Abstract:
A harness protecting structure is provided for a vehicular horn for a vehicle, in which the vehicle has a grille defining an air intake opening in a front part of the vehicle, a radiator located posterior to the grille, and the horn being disposed in front of the radiator and facing the opening of the grille. The grille is provided with a peripheral wall, the peripheral wall extending posterior to the lower and side edge of the grill, and a part of the peripheral wall extending across and anterior to a peripheral region of the horn so as to form a protective surface. The harness of the horn is laid from the outside of the region of the horn behind the protective surface.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a harness protecting structure for a vehicular horn, which is arranged inside a radiator grille that forms an outside air intake opening in the front part of a vehicle. 
       BACKGROUND OF THE INVENTION 
       [0002]    A radiator grille, disposed in the front part of a vehicle body, has an opening divided into small sections to prevent foreign matter from entering into an engine chamber, but allows outside air to enter into a radiator and the engine chamber for cooling.  FIG. 1  shows a honeycomb louver type radiator grille  2  disposed in the slanted front part of the vehicle body. Such a radiator grille has a problem in that the lower the portion thereof, the larger the space between the radiator grille and the radiator ( 5 ) because of the slant, and due to this space, the interior of the engine chamber is undesirably visible through the radiator grille. 
         [0003]    In addition, a horn ( 6 ) may be used by the driver as an alarm for alerting other vehicles or pedestrians, and the horn is generally disposed inside of the radiator grille or the engine chamber. In recent years, security systems using horns have been put to practical use. The security system sounds the horn at a high volume to issue an alarm to the surrounding area when a parked vehicle is forcibly unlocked for the purpose of theft, etc. However, situations have arisen in which an experienced criminal who is familiar with such security systems executes a crime after making the horn inoperative by inserting a cutting tool through the opening of the radiator grille in advance and cutting the horn harness. 
         [0004]    In order to provide the alarm sound with a sufficient sound pressure, the horn is advantageously arranged near the grille opening (refer to Japanese Utility Model Publication No. 63-23238); however, consideration has not been given to the above-mentioned circumstances. Usually, the radiator is disposed at the rear of the radiator grille, and a horn harness that is disposed in front of the radiator must be laid so as to go around the side of the radiator, and this makes access to the harness from the outside easy. The horn is sometimes arranged at a position hidden by a bumper or an engine hood (refer to Japanese Patent Application, First Publication No. 2000-103303 and Japanese Patent Application, First Publication No. 2004-330852). In this case, the alarm sound inevitably has a tendency to be muffled on the inside of the bumper or the engine hood. Even if the horn is arranged at a somewhat distant position, a radical solution to the above-mentioned situation is not achieved. 
       BRIEF SUMMARY OF THE INVENTION 
       [0005]    The present invention has been made in view of the above circumstances, and accordingly, an object thereof is to provide a harness protecting structure for a vehicular horn, which is arranged at the rear of a grille in the front part of a vehicle and can prevent a harness from being cut by a cutting tool inserted through a grille opening, while at the same time providing an alarm sound with a sufficient sound pressure. 
         [0006]    To achieve the above object, the present invention provides a harness protecting structure for a vehicular horn on a vehicle, the vehicle having a grille defining an air intake opening in the front part of the vehicle and a radiator located posterior to the grille, the horn being disposed in front of the radiator and facing the opening of the grille, wherein the grille is provided with a peripheral wall, the peripheral wall extending posterior to the lower and side edge of the grill, and a part of the peripheral wall extending across and anterior to a peripheral region of the horn so as to form a protective surface; and the harness of the horn is laid from the outside of the peripheral region of the horn behind the protective surface. 
         [0007]    Since the harness protecting structure for a vehicular horn in accordance with the present invention is configured as described above, the harness can be prevented from being cut by a malicious person because the harness is disposed so as to go around the radiator and is hidden by the peripheral wall and cannot be seen from the outside, and also the harness is protected from a cutting tool being inserted through the opening of grille by means of the peripheral wall and thereby the access to the harness is made impossible, and the horn is arranged posterior to the grille in the vehicle front part and facing to the opening so that the alarm sound can be provided with a sufficient sound pressure. 
         [0008]    In the present invention, in a mode in which the peripheral wall is formed with a swelled surface that is continuous with the protective surface and projects anterior to the lower part of the horn, by a trough-shaped surface formed along the outer periphery of the horn by the protective surface and the swelling surface, the alarm sound of the horn can be transmitted reliably to the front without being dissipated in an engine chamber, and can be generated to the outside of vehicle efficiently. 
         [0009]    Also, in the present invention, in a mode in which the peripheral wall is formed by an inner cover attached to the grille, the opening shape of the grille and the shape around the protective surface can be formed easily. 
         [0010]    Furthermore, in the present invention, in a mode in which the inner cover is provided with an upper wall extending in the vehicle width direction along the upper edge of the grille, and a notch corresponding to the external shape of the horn is formed in the upper wall anterior to the horn, the alarm sound of the horn can be generated to the outside of vehicle efficiently through the notch, while the upper part of the horn is protected by the upper wall. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0011]      FIG. 1  is a perspective view showing the front part of an automobile to which the harness protecting structure in accordance with the present invention is applied; 
           [0012]      FIG. 2  is a perspective view showing a disassembled state of the front part of an automobile; 
           [0013]      FIG. 3  is a front view showing a radiator grille to which a harness protecting structure for a vehicular horn in accordance with the present invention is applied; and 
           [0014]      FIG. 4  is a perspective view of an essential portion, showing a disassembled state of a radiator grille and an inner cover and showing the positional relationship with a horn. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0015]    An embodiment of the present invention will now be described in detail with reference to the accompanying drawings. 
         [0016]      FIG. 1  is a perspective view showing the front part of an automobile provided with a horn to which a harness protecting structure in accordance with the present invention is applied. In  FIG. 1 , in the front part of the automobile, a bumper fascia  1  is provided, and a radiator grille  2  is mounted in an opening  10  formed in the upper part of the bumper fascia  1 . An upper edge portion  23  of the radiator grille  2  is adjacent to the front end edge of an engine hood  5  that covers an engine chamber, and headlamps  4  are disposed on both sides of the radiator grille  2 . The bumper fascia  1  extends to both sides along the lower edges of the headlamps  4 , and both end portions thereof are adjacent to fenders  6 . 
         [0017]      FIG. 2  shows a disassembled state of the front part of the automobile. In  FIG. 2 , in the foremost part of a vehicle body  7 , a reinforcement  71  and a core support  72  are provided so as to extend in the vehicle width direction. In the center of the core support  72 , a hood lock support  73  is provided integrally, and the lower end thereof is connected to the reinforcement  71 . At the rear of the reinforcement  71  and the hood lock support  73 , a radiator  8  supported by the core support  72  is disposed. 
         [0018]    A horn  9  is attached to the lower end of a stay  91 . The stay  91  extends downward from one side of the core support  72 , and the horn  9  is disposed in front of the upper side portion of the radiator  8 . Therefore, a harness  92  for supplying power to the horn  9  is pulled out once from the back surface of the horn  9  to the side, and it is laid around the side of the radiator  8 . As previously described, this layout provides ease of access to the harness from the outside. 
         [0019]    The bumper fascia  1  is disposed to cover the front side of the reinforcement  71 , and the opening  10  is provided on the upper side of a portion corresponding to the reinforcement  71 . Around the opening  10 , an attachment portion  11  is provided for the radiator grille  2 . The entire surface of the radiator grille  2  is provided with opening  20  divided into small sections to prevent foreign matter from entering into the engine chamber, but allows outside air to enter the engine chamber through the opening  20 . In the example shown in the figures, between the upper edge portion  23  that is adjacent to the front end edge of the engine hood  5  and extends substantially linearly in the vehicle width direction and a lower edge portion  21  consisting of a central portion extending substantially horizontally and an inclined portion smoothly continuous with both sides of the central portion, a honeycomb lattice portion  2  is formed into a honeycomb louver shape. 
         [0020]    The radiator grille  2  configured as described above has an inclination corresponding to the slanted shape of a front part of the vehicle, and thereby, the closer to the lower edge portion  21 , the larger the space between the radiator grille  2  and the radiator  8 . Therefore, conventionally, the upper surface of the reinforcement  71  and the like are undesirably visible from the outside through the radiator grille  2 . In particular, in the case in which the radiator grille  2  has a dark color, such as black, if the paint color of the vehicle body including the reinforcement  71 , the core support  72 , and the hood lock support  73 , is a bright color such as white, the appearance of the vehicle front part is greatly deteriorated. 
         [0021]    Accordingly, an inner cover  3  is mounted on the back surface of the radiator grille  2 . The inner cover  3  has a function as an inlet for guiding outside air into the radiator  8  and the engine chamber to improve the cooling performance of engine, and also has a function as a screen for the reinforcement  71 , the core support  72 , and the hood lock support  73 . 
         [0022]    The inner cover  3  has an external shape that is almost the same as that of the radiator grille  2 , and has a peripheral wall  31  (a shelflike surface) extending posterior to the lower and side edge portion thereof attached to the back surface of the radiator grille  2 . In the finally attached state shown in  FIG. 3 , the peripheral wall  31  is positioned above the reinforcement  71 , and it functions as a screen for the reinforcement  71 . The central portion of the inner cover  3 , which divides an opening  30  thereof into two right and left sections, covers the hood lock support  73 . 
         [0023]    In addition, both right and left sides of the peripheral wall  31  are continuous with side wall portions  31   a  curvedly inclined upward. In the finally attached state, as shown in  FIGS. 3 and 4 , the side wall portion  31   a  extends close to the front surface of the horn  9  and obliquely crosses the lower part of the horn  9 . From the back surface of the region in which the side wall portion  31   a  crosses, the harness  92  is laid to the side. 
         [0024]    Therefore, the harness  92  cannot be seen from the outside due to the side wall portion  31   a , and also, a cutting tool, etc., inserted from the outside of the radiator grille  2 , cannot reach the harness  92 . That is to say, the side wall portions  31   a  of the peripheral wall  31  form a protective surface for the harness  92  for the horn  9 . 
         [0025]    Furthermore, in the lower part of the side wall portion  31   a  of the peripheral wall  31 , a swelled surface  31   b  is formed which swells from the side wall portion  31   a  smoothly curved along the lower edge portion  21  of the radiator grille  2 . As shown in  FIG. 3 , the swelled surface  31   b  swells to the front surface lower part of the horn  9 , and forms the protective surface over a wider angle together with the side wall portion  31   a . In particular, the swelled surface  31   b  is effective in preventing a cutting tool, etc., from reaching the harness  92  from the lower side of the horn  9 . 
         [0026]    On the other hand, along the lower side of an upper edge portion  33  of the inner cover  3 , an upper wall surface  32  extending in the vehicle width direction is provided. The upper wall surface  32  has an inclination along the back surface of the radiator grille  2 , and in the finally attached state, is joined to the back surface of the radiator grille  2 . The upper wall surface  32  has a function as a screen for preventing the upper portion of the radiator  8 , the attachment portion to the core support  72 , and the like from being visible from the outside. 
         [0027]    Also, as shown in  FIGS. 3 and 4 , in a portion corresponding to the horn  9  of the upper wall surface  32 , a notch  32   a  along the external shape of the horn  9  is formed. In the finally attached state, the upper front surface of the horn  9  is opened, so that not only is the alarm sound not hindered, but also the back of the horn  9  cannot be seen from above, and a cutting tool, etc., can be effectively prevented from reaching the harness  92  from the upper side. 
         [0028]    As shown in  FIG. 4 , the inner cover  3  configured as described above is mounted on the back surface of the radiator grille  2  by a method as described below. Claw portions  23   b  are provided projecting on the upper back surface of the radiator grille  2  and are inserted into slits  33   b  provided in the upper edge portion  33 , and locking pieces  31   c  are provided in a lower edge portion ( 31 ) and are locked to locking portions ( 21   c ) of the radiator grille  2  to temporarily fix the inner cover  3  to the radiator grille  2 . Then, screws inserted into holes  33   a  are threadedly tightened to engagement portions  23   a  of the radiator grille  2 . 
         [0029]    The radiator grille  2  to which the inner cover  3  has been mounted integrally in advance as described above is fixed to the opening  10  of the bumper fascia  1  by locking pieces  21   c , which are also used as the locking portions, in the lower edge portion  21  and locking pieces  23   c  provided in the upper edge portion  23  to the attachment portion  11  around the opening  10  of the bumper fascia  1  and by threadedly engaging the radiator grille  2  with the bumper fascia  1  with screws (not shown). As shown in  FIG. 3 , one screw hole  31   d  of a plurality of screw holes for fixing the radiator grille  2  is provided on the lower side of the swelled surface  31   b . Thereby, the rigidity of the protective surface  31   a , 31   b  ranging from the side wall portion  31   a  to the swelled surface  31   b  is improved. Therefore, since the deformation is restrained, a more reliable protecting effect can be achieved. 
         [0030]    In addition, since the protective surface  31   a , 31   b  is disposed so as to avoid the central portion of the horn  9 , the alarm sound is not hindered from being generated toward the front. Instead, the alarm sound is effectively transmitted to the front by the trough-shaped protective surface  31   a , 31   b  extending linearly from a portion near the sound-generating part of the horn  9  to the front (having a slightly downward inclination), so that the protective surface  31   a , 31   b  is also advantageous in preventing the sound pressure from being decreased by the diffusion to the engine chamber side. 
         [0031]    The above is a description of one embodiment of the present invention. The present invention is not limited to the above-described embodiment. Various modifications and changes based on the technical concept of the present invention can be made. 
         [0032]    For example, at least one of the peripheral wall surfaces  31  of the inner cover  3 , the side wall portion  31   a , and the swelled portion  31   b  can be formed integrally on the radiator grille  2  side. In addition, depending on the shape of the radiator grille, a portion corresponding to any other part or the entirety of the peripheral wall surface  31  and further the entirety of the inner cover excluding the central portion corresponding to the hood lock support  73  can be formed integrally on the radiator grille  2  side.