JP4847925B2 - Horn mounting structure - Google Patents

Description

  The present invention relates to a horn mounting structure for a motorcycle, and more particularly to a horn mounting structure in which a horn is provided in the vicinity of an engine.

  A motorcycle or the like is provided with a horn as a horn, and the horn blows in conjunction with a driver's switch operation to alert other vehicles and pedestrians (hereinafter simply referred to as others). be able to.

  When a small horn is used, the degree of freedom in layout and design in a motorcycle increases, but a horn of a certain size is used to obtain a sufficient sound pressure.

  For example, in the motorcycle described in Patent Document 1, a horn is provided on the side and the horn is covered with a cover so that the horn cannot be seen from the front, and a plurality of small windows are formed on the inclined side surface. Yes.

Japanese Utility Model Publication No. 62-162178

  In motorcycles, how to install a horn having a certain size is important because of space constraints and design requirements.

  When the horn must be provided at a position where it can be visually recognized, a cover is provided so as not to damage the design, but the sound pressure is lowered by the cover, and a larger horn is required. .

  Moreover, it is desirable that the harness connected to the horn is as short as possible for ease of design and assembly.

  Furthermore, it is desirable that the horn can give attention to others, especially in front of the rear.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a horn mounting structure that improves aesthetics while ensuring a sufficient sound pressure and that does not make a connecting harness conspicuous.

  The horn mounting structure according to the present invention has the following characteristics.

  First feature: In a horn mounting structure for a motorcycle, a horn is provided between an engine and a tank above the engine, and the main direction of sound propagation is directed to the upper surface of the engine. It is provided so that it may face the front rather than.

  In this way, by providing the horn between the engine and the tank, the horn and its connection harness become inconspicuous and the aesthetics can be improved.

  Here, the main direction is the direction of the central axis on the structure of the horn, and is the direction in which the sound pressure of the generated sound is highest. The tank is generally a fuel tank, but includes a large-capacity air chamber or the like, and is a generic name for tank-shaped members provided at a position where the driver's knee or inner thigh can come into contact.

  Second feature: The engine includes a cylinder directed obliquely forward, and the horn is provided such that the main direction is directed to an upper surface of the cylinder.

  In this way, when the horn generates sound toward the upper surface of the cylinder, the sound is easily reflected toward the upper surface and transmitted forward.

  Third feature: The engine is a V-type engine, and the engine includes a front cylinder directed obliquely forward and a rear cylinder directed obliquely rearward, and the cylinder is a front cylinder. Thereby, it becomes applicable also to a V-type engine, and the sound of a horn is easy to be reflected toward the front.

  Fourth feature: The motorcycle has a pair of down tubes that are bifurcated from a head column and extend diagonally downward to the left and right, and the location where the main direction hits the upper surface of the engine is the front of the motorcycle. It arrange | positions between a pair of said down tubes by projection view, It is characterized by the above-mentioned.

  Thus, in a front view, when a portion where the main direction of the sound hits the upper surface of the engine is provided between the pair of down tubes, the sound is not shielded and easily transmitted forward.

  Fifth feature: the motorcycle has a radiator provided on the pair of down tubes, and the location where the main direction hits the upper surface of the engine is disposed above the radiator in a front projection view of the motorcycle. It is characterized by being. This makes it difficult for the sound of the horn to be blocked by the radiator.

  According to the horn mounting structure according to the present invention, by providing the horn between the engine and the tank as described above, the horn and its connection harness are not noticeable, and the aesthetic appearance can be improved. In addition, the horn is provided so that the main direction of sound propagation is directed to the upper surface of the engine and to the front rather than directly below, so that the reflected sound is easily transmitted forward and sufficient sound pressure is achieved. Can be secured.

  Embodiments of the horn mounting structure according to the present invention will be described below with reference to FIGS.

  As shown in FIGS. 1 and 2, the horn mounting structure 10 according to the present embodiment is applied to a motorcycle 12. The motorcycle 12 is configured based on a cradle-type frame 14, and the frame 14 is divided into a head column 16 at the tip and a pair of down tubes that are bifurcated from the head column 16 and extend obliquely downward to the left and right. 18a, 18b, and an inclined top tube 20 that gently falls rearward from the head column 16. A front wheel 24 is rotatably connected to the head column 16 via a pair of forks 22. A handle 26 for steering the front wheel 24 is provided above the head column 16. The handle 26 is provided with a plurality of operating devices including a horn switch 27. A rear wheel 30 is provided behind the frame 14 via a suspension 28.

  An engine 32 is provided behind the down tubes 18 a and 18 b and below the top tube 20. The engine 32 is a V-type two-cylinder and includes a front cylinder 36 extending obliquely forward from a lower crankcase 34, a rear cylinder 38 extending obliquely rearward, a front cylinder 36 and a rear cylinder. 38, and a combination switch cover 40 provided between the two. The angle formed by the front cylinder 36 and the rear cylinder 38 is, for example, about 60 °. Exhaust pipes protrude from the front cylinder 36 and the rear cylinder 38, respectively, and a muffler 42 is formed as a single unit on the way.

  A fuel tank 44 is provided above the engine 32. The fuel tank 44 is provided so as to straddle part of the top tube 20, and an appropriate space is provided between the fuel tank 44 and the front cylinder 36. A seat 46 is provided behind the fuel tank 44. Below the seat 46, an electrical component 48 such as a battery or a controller is provided. The electrical component 48 is connected to an operating device such as a horn switch 27 in the handle 26 by a main harness 50 (see FIG. 4). ing. The main harness 50 is provided along the top tube 20, and most of the main harness 50 is surrounded by the seat 46 and the fuel tank 44, so that it does not stand out. A radiator 52 is provided between the pair of down tubes 18a and 18b. The radiator 52 is provided from the lower end portions of the down tubes 18a and 18b to a substantially intermediate height portion, and the upper portion is open (see FIG. 6).

  The horn mounting structure 10 according to the present embodiment is a mounting structure for the horn 60. The horn 60 blows out based on the operation of the horn switch 27 to alert others, and is controlled directly from the horn switch 27 or controlled via a predetermined controller.

  As shown in FIG. 3, the horn 60 is an electric flat type in which a disk-like vibrator vibrates and generates sound when a voltage is applied. The horn 60 has a pair of terminals 60a for applying voltage and a stay 60b for attachment.

  4 and 5, the horn 60 is provided between the engine 32 and the fuel tank 44 above the engine 32, and is fixed to the top tube 20 via a stay 60b (see FIG. 3). Yes. The horn 60 is provided so that the main direction A in which sound propagates is directed to the upper surface of the cylinder head 37 in the front cylinder 36 and slightly forward from directly below. Here, the main direction A is basically the direction of the central axis of the circular vibrator when the horn 60 is a flat type, and is the direction in which the sound pressure of the generated sound is highest.

  Thus, when the horn 60 generates sound toward the upper surface of the upper cylinder head 37 in the front cylinder 36, the sound is reflected on the upper surface of the cylinder head 37 and easily transmitted forward. That is, as shown in FIG. 4, the main direction A hits the point P of the cylinder head 37, and the sound is reflected at the point P and easily transmitted forward. Since sound diffuses, it goes without saying that it is properly propagated in the direction other than the direction of the arrow in FIG.

  Further, as shown in FIG. 5, by making the periphery of the point P on the upper surface of the cylinder head 37 a smooth surface without projections, useless irregular reflection is prevented, and the sound is more easily propagated forward. Instead of smoothing the cylinder head 37 itself, a cover or reflecting plate having a smooth surface may be provided between the cylinder head 37 and the horn 60.

  In the vicinity of the point P in the cylinder head 37, it is preferable that the protrusions are eliminated in order to facilitate the propagation of sound toward the front, and the shape is gently inclined toward the front and not inclined in the left-right direction. Depending on the design conditions, an appropriate inclination may be provided in the left-right direction in order to sufficiently distribute the sound to the left and right.

  As is apparent from FIG. 4, even if the entire horn 60 is exposed in a side view, the horn 60 is mounted substantially downward and only the side surface is exposed, so that the exposed area is Is small and does not stand out. Even if the horn 60 is exposed in a side view, the horn 60 is covered with the fuel tank 44 from the upper side or the diagonally upper side, which is the viewpoint of the viewer, and is not visually recognized.

  In such a horn mounting structure 10, sound is likely to propagate forward, but the space in which the horn 60 is mounted is also open in the left-right direction, and appropriate sound is transmitted in a balanced manner in the left-right direction. Is done. Since this space is covered by the fuel tank 44, the rear is covered by the combination switch cover 40 and the seat 46, and the lower part is closed by the engine 32, the sound emitted by the horn 60 is mainly forward and It will come off to the side, and it will be possible to alert the front and side others efficiently. Therefore, the degree of freedom in layout and design is improved without excessively increasing the size of the horn 60.

  Further, since the horn 60 is provided between the fuel tank 44 and the engine 32 and is attached to the top tube 20, the distance from the main harness 50 disposed along the top tube 20 is extremely short. . Therefore, the branch harness 50a (see FIG. 4) for connecting the main harness 50 and the horn 60 is very short, reduces the cost, does not stand out, and is easy to dispose. The branch harness 50a is covered by the fuel tank 44 and is hardly visually recognized.

  The direction of the horn 60 is set parallel to the direction in which the top tube 20 extends in a side view, and attachment to the top tube 20 is easy.

  As shown in FIG. 6, in the front projection view of the motorcycle 12, the point P where the main direction A hits the upper surface of the cylinder head 37 faces between the down tubes 18 a and 18 b and the radiator 52. Therefore, there is nothing that shields the sound reflected by the point P and traveling forward, and the sound is easily propagated forward.

  In front view (see FIG. 2), the point P may be hidden by the front wheel 24, but the front wheel 24 is narrow and the sound reflected at the point P is moderately diffused at the location of the front wheel 24. Sound is almost unobstructed.

  In general, since the fuel tank 44 has a structure that can be easily removed, maintenance of the horn 60 provided in the lower portion of the fuel tank 44 is easy.

  As described above, according to the horn mounting structure 10 according to the present embodiment, by providing the horn 60 between the engine 32 and the fuel tank 44, the horn 60 and the branch harness 50a connected thereto become inconspicuous, Aesthetics can be improved. Further, by providing the main direction A in which the sound propagates is directed to the upper surface of the cylinder head 37 of the front cylinder 36 and to the front rather than directly below, the sound is easily propagated forward, so that sufficient sound can be transmitted. For example, even if a small horn 60 is used, the sound pressure regulations of each country can be satisfied. In the horn mounting structure 10, a small horn 60 is sufficient to secure a predetermined sound pressure, and power consumption can be suppressed.

  In the horn mounting structure 10, it is possible to effectively alert the other person in front in particular. In the space in which the horn 60 is provided, at least the point P is opened to the left and right, and sound can be produced in a balanced manner in the left-right direction. In the horn mounting structure 10, it is not necessary to provide a design cover for covering the horn 60, so that sound is not attenuated unnecessarily, and an appropriately small one can be employed.

  The motorcycle 12 to which the horn mounting structure 10 is applied may be other types. The engine 32 is not limited to the V type 2 cylinder, but may be another type such as a V type 4 cylinder or an in-line 4 cylinder.

  Of course, the horn mounting structure according to the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the gist of the present invention.

1 is a side view of a motorcycle to which a horn mounting structure according to an embodiment is applied. 1 is a front view of a motorcycle to which a horn mounting structure according to an embodiment is applied. It is a front view of a horn. It is a side view of the periphery of a horn mounting structure in a motorcycle. FIG. 3 is a perspective view of the periphery of a horn mounting structure in a motorcycle. FIG. 2 is a front view of a motorcycle with a front wheel and a fork omitted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Horn mounting structure 12 ... Motorcycle 18a, 18b ... Down tube 20 ... Top tube 32 ... Engine 36 ... Front cylinder 37 ... Cylinder head 38 ... Rear cylinder 40 ... Combination switch cover 44 ... Fuel tank 50 ... Main harness 52 ... Radiator 60 ... Horn

Claims (5)

In the horn mounting structure of a motorcycle,
A horn is provided between the engine and the tank above the engine, and the horn is provided so that the main direction of sound propagation is directed to the upper surface of the engine and to the front rather than directly below. A horn mounting structure characterized by In the horn mounting structure according to claim 1,
The engine includes a cylinder directed diagonally forward;
The horn mounting structure, wherein the horn is provided such that the main direction is directed to an upper surface of the cylinder. In the horn mounting structure according to claim 2,
The engine is a V-type engine, and the engine includes a front cylinder directed obliquely forward and a rear cylinder directed obliquely rearward,
The horn mounting structure, wherein the cylinder is a front cylinder. In the horn mounting structure according to any one of claims 1 to 3,
The motorcycle has a pair of down tubes that are bifurcated from the head column and extend diagonally downward on the left and right sides,
A horn mounting structure, wherein a portion where the main direction hits the upper surface of the engine is disposed between the pair of down tubes in a front projection view of the motorcycle. In the horn mounting structure according to claim 4,
The motorcycle has a radiator provided on the pair of down tubes,
A horn mounting structure, wherein a portion where the main direction hits the upper surface of the engine is disposed above the radiator in a front projection view of the motorcycle.

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