JP2014153579A - Electric horn for vehicle use - Google Patents

Abstract

PROBLEM TO BE SOLVED: To downsize electric horns while restraining invasion of foreign matter through openings of sound wave outlets.SOLUTION: By disposing on an inner wall face near a sound wave outlet opening 202 in a resonance tube 20 a wind shield wall 203 that slows down the flow speed of running winds W invading from the sound wave outlet opening 202 into a sound passage 201, the running winds W are prevented from readily invading deep into the sound passage 201 to make it possible to restrain invasion of foreign matter. Also, as the wind shield wall 203 is arranged within the resonance tube 20, the electric horn can be reduced in size.

Description

  The present invention relates to a vehicular electric horn attached to a vehicle such as a passenger car, a bus, or a truck.

  In a conventional electric horn for a vehicle, air is vibrated by a vibrating member that vibrates due to electromagnetic force to generate a dense wave (sound wave), which is amplified by a resonance tube and emitted from a sound wave outlet opening. In order to suppress entry of foreign matter such as water, snow, and sand from the sound wave outlet opening, a foreign matter intrusion prevention member is attached to the resonance tube so as to cover the sound wave outlet opening (for example, Patent Document 1). reference).

JP 2011-76018 A

  However, since the foreign matter intrusion preventing member is arranged outside the resonance tube, there is a problem that the electric horn is increased in size.

  In view of the above points, an object of the present invention is to reduce the size of an electric horn while suppressing entry of foreign matter from a sound wave outlet opening.

  In order to achieve the above object, according to the first aspect of the present invention, the horn housing (10), the vibration member (11) that is fixed to the horn housing and generates sound waves, is connected to the horn housing, and the sound path (201 208) is formed in the interior and includes a resonance tube (20) for resonating a sound wave generated from the vibration member, in the vicinity of the sound wave outlet opening (202, 209) in the resonance tube. The inner wall surface is provided with a windbreak wall (203) for reducing the flow velocity of the traveling wind entering the sound path from the sound wave outlet opening.

  According to this, since the flow velocity of the traveling wind that enters the sound path is reduced, the traveling wind does not easily enter the depths of the sound path, and foreign objects can be prevented from entering. Moreover, since the windbreak wall is disposed inside the resonance tube, the electric horn can be reduced in size.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is sectional drawing which shows the structure of the electric horn for vehicles which concerns on 1st Embodiment of this invention. It is A arrow directional view of FIG. It is a B arrow line view of FIG. It is CC sectional drawing of FIG. It is a perspective view of the electric horn for vehicles concerning a 2nd embodiment of the present invention. It is a top view of the electric horn of FIG. It is a D arrow line view of FIG. It is EE sectional drawing of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
A first embodiment of the present invention will be described. In addition, the top and bottom arrows in the figure indicate the top and bottom direction when mounted on the vehicle, and the front and rear arrows indicate the front and rear direction of the vehicle when mounted on the vehicle.

  As shown in FIG. 1, a stepped cylindrical horn housing 10 is fixed with a thin plate-like vibrating member 11 that generates a sound wave so as to cover an opening at one end of the horn housing 10, and further vibrates. A plate-like cover member 12 is fixed so as to cover the member 11. An opening 120 is provided at the center of the cover member 12. Then, the outer peripheral end portion of the cover member 12 is wound and fixed to the outer peripheral end portion of the horn housing 10 so as to overlap the outer peripheral end portion of the vibration member 11.

  In the horn housing 10, a cylindrical coil 13, a columnar fixed iron core 14, and a columnar movable iron core 15 are arranged for vibrating the vibrating member 11 by electromagnetic force. The coil 13 and the fixed iron core 14 are fixed to the horn housing 10. The movable iron core 15 is caulked and fixed to the central portion of the vibration member 11.

  In the horn housing 10, a movable contact 16 and a fixed contact 17 for opening and closing an energization circuit to the coil 13 are arranged. The movable contact 16 is fixed to the spring plate 18 and is biased toward the fixed contact 17 side by the spring force of the spring plate 18.

  The distal end side of the spring plate 18 faces the movable iron core 15, and when the movable iron core 15 is attracted to the fixed iron core 14 side, the movable iron core 15 moves the distal end side of the spring plate 18 to the fixed iron core 14 side, and the movable contact point. 16 leaves the fixed contact 17 and the energization circuit to the coil 13 is opened.

  When the energization circuit is opened and the electromagnetic force disappears, the movable iron core 15 moves away from the fixed iron core 14 so that the movable contact 16 contacts the fixed contact 17 and the energization circuit to the coil 13 is closed. It has become.

  A resin resonance tube 20 is fixed to the horn housing 10 so as to cover the cover member 12.

  As shown in FIGS. 1 and 2, a sound wave inlet opening 200 serving as an inlet for sound waves generated from the vibrating member 11 is formed at the center of the resonance tube 20. A spiral sound path 201 that propagates while amplifying the sound wave transmitted from the sound wave inlet opening 200 is formed inside the resonance tube 20. A sound wave outlet opening 202 for emitting the sound wave that has passed through the sound path 201 to the outside is formed at the outer edge of the resonance tube 20.

  Here, as shown in FIG. 2, the electric horn of the present embodiment is mounted on the vehicle so that the sound path 201 looks spiral when viewed in the vehicle front-rear direction (vertical direction in FIG. 2). Is done. In addition, the electric horn of the present embodiment is mounted on the vehicle such that the sound wave outlet opening 202 is positioned below.

  As shown in FIGS. 1, 3, and 4, the inner wall surface forming the sound path 201 enters the sound path 201 from the sound wave outlet opening 202 in the vicinity of the sound wave outlet opening 202 and on the rear side of the vehicle. A windbreak wall 203 that reduces the flow velocity of the traveling wind W is formed integrally.

  The windbreak wall 203 has a plate shape, extends in the left-right direction of the vehicle (the vertical direction in FIG. 3), and protrudes from the inner wall surface forming the sound path 201 toward the sound path 201 side. Further, the windbreak wall 203 is disposed between the top in the top-and-bottom direction (hereinafter referred to as the sound path apex) of the sound path 201 and the sound wave outlet opening 202.

  Next, the operation of the electric horn configured as described above will be described. The electric horn vibrates by intermittently attracting the movable iron core 15 to the fixed iron core 14 by intermittently energizing the coil 13. When the movable iron core 15 vibrates, the vibration member 11 also vibrates together, and the vibration member 11 generates sound waves. The sound wave enters the sound path 201 from the sound wave entrance opening 200, reaches the sound wave exit opening 202 through the sound path 201, and is emitted from the sound wave exit opening 202 to the outside as an alarm sound.

  By the way, during traveling of the vehicle, the traveling wind W enters the sound path 201 from the sound wave outlet opening 202. The traveling wind W flows along the inner wall surface on the vehicle rear side of the inner wall surface in the vicinity of the sound wave outlet opening 202, but the windbreak wall 203 becomes a resistance and the flow velocity is reduced. Therefore, it becomes difficult for the traveling wind W to enter the depth of the sound path 201, and foreign objects can be prevented from entering with the traveling wind W.

  If the traveling wind W does not reach the top of the sound path, foreign matter such as water, snow, and sand does not exceed the top of the sound path. Therefore, the specification of the windbreak wall 203 is set so that the flow velocity of the traveling wind W decreases to a speed at which the traveling wind W does not reach the top of the sound path.

  Further, since the windbreak wall 203 is disposed inside the resonance tube 20, the electric horn can be reduced in size.

  Further, since the windbreak wall 203 is formed integrally with the resonance tube 20, it is not necessary to provide another component such as a conventional foreign matter entry preventing member.

(Second Embodiment)
A second embodiment of the present invention will be described. In addition, the top and bottom arrows in the figure indicate the top and bottom direction when mounted on the vehicle, and the front and rear arrows indicate the front and rear direction of the vehicle when mounted on the vehicle.

  In the present embodiment, the configuration of the resonance tube 20 is different from that of the first embodiment, and the other parts are the same as those of the first embodiment. Therefore, only different portions will be described.

  As shown in FIGS. 5 to 8, the wall surface of the resonance tube 20 on the vehicle front side is parallel to the parallel wall surface 205 parallel to the end surface 204 on the horn housing 10 (see FIG. 1) side and the end surface 204 on the horn housing 10 side. The surface of the resonance tube 20 on the vehicle front side is stepped. Further, between the parallel wall surface 205 and the inclined wall surface 206, an orthogonal wall surface 207 extending perpendicularly to the end surface 204 on the horn housing 10 side and extending in the vertical direction is formed.

  The resonance tube 20 includes a branched sound path 208 branched from the sound path 201 at a position close to the sound wave outlet opening 202. A second sound wave outlet opening 209 that emits sound waves that have passed through the branch sound path 208 to the outside is formed in the orthogonal wall surface 207. The sound wave outlet opening 202 and the second sound wave outlet opening 209 emit sound waves in different directions.

  On the inner wall surface forming the branched sound path 208, a windbreak wall 203 that reduces the flow velocity of the traveling wind W that enters the branched sound path 208 from the second sound wave outlet opening 209 is integrally formed. The windbreak wall 203 has a plate shape, extends in the vertical direction, and protrudes from the inner wall surface forming the branched sound path 208 toward the branched sound path 208 side. Further, the windbreak wall 203 is disposed between the top in the vertical direction of the sound path 201 and the second sound wave outlet opening 209.

  In the above configuration, the sound wave generated by the vibrating member 11 passes through the sound path 201 to the sound wave outlet opening 202 and is emitted from the sound wave outlet opening 202 to the outside as an alarm sound. The second sound wave outlet opening 209 is passed through 208 and emitted from the second sound wave outlet opening 209 to the outside as an alarm sound.

  By the way, after the traveling wind W colliding with the parallel wall surface 205 changes its direction and enters the branch sound path 208 from the second sound wave outlet opening 209, a part of the traveling wind W flows to the sound path 201 side. Here, the traveling wind W that has entered the branch sound path 208 from the second sound wave outlet opening 209 is reduced in flow velocity by the windbreak wall 203 acting as a resistance. Therefore, the traveling wind W flowing from the branching sound path 208 toward the sound path 201 becomes difficult to penetrate to the back of the sound path 201, and foreign matter can be prevented from entering with the traveling wind W.

  In addition, each said embodiment can be arbitrarily combined in the range which can be implemented.

DESCRIPTION OF SYMBOLS 10 Horn housing 11 Vibrating member 20 Resonance tube 201 Sound path 202 Sound wave exit opening 203 Windbreak wall 208 Branch sound path 209 2nd sound wave exit opening

Claims (3)

A horn housing (10);
A vibrating member (11) fixed to the horn housing and generating sound waves;
An electric horn for a vehicle comprising a resonance tube (20) connected to the horn housing and having a sound path (201, 208) formed therein to resonate a sound wave generated from the vibration member,
A windbreak wall (203) is provided on an inner wall surface of the resonance tube in the vicinity of the sound wave outlet opening (202, 209) for reducing the flow velocity of traveling wind entering the sound path from the sound wave outlet opening. Electric horn for vehicles. The sound path is spiral when viewed in the horizontal direction,
2. The electric horn for a vehicle according to claim 1, wherein the windbreak wall is disposed between an uppermost portion in the top-and-bottom direction of the sound path and the sound wave outlet opening.   3. The electric horn for a vehicle according to claim 1, wherein the windbreak wall is formed integrally with the resonance tube.

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