JP2011076018A - Vehicle electric horn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle electric horn that simplifies a fixation structure for mounting a foreign matter entry prevention material into a resonance tube, and has no possibility that the horn falls off. <P>SOLUTION: A sonic wave opening part 25b of the resonance tube 25 includes an internal concave groove 25d on an opening peripheral part of which the foreign matter entry prevention material 26 is mounted. The foreign matter entry prevention material 26 includes an outward concave groove 26d that is inserted into the inward concave groove 25d on a material peripheral part thereof. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an electric horn (sound alarm) for a vehicle provided with a resonance tube.

  The electric horn vibrates air with a diaphragm that vibrates due to electromagnetic force, and emits sound waves through a resonance tube. That is, the air vibration generated by the diaphragm is transmitted to the outside of the electric horn through the air passage inside the resonance tube.

  In the case of an electric horn for a vehicle, rain water, splashes during traveling, or water during car washing may enter the resonance tube from the sound wave outlet opening of the resonance tube. When these foreign substances enter the resonance tube, the sound pressure or the like may change, causing problems such as temporarily reducing the sound.

  Therefore, several electric horns for vehicles that can prevent the entry of water droplets and the like have been developed. For example, an electric horn has been developed in which a cap having the same size as the outlet opening is fixed to a sound wave outlet opening of a resonance tube with a claw formed around the cap (for example, see Patent Document 1).

  In addition, an electric horn has been developed in which an entrance prevention plate that has the same air permeability as the exit opening of the resonance tube and that does not allow foreign objects to pass through is fixed by a fixing member with a claw (for example, a patent) Reference 2).

  In addition, an electric horn in which a reflecting member is integrally extended from a sound wave outlet opening of a resonance tube has been developed (see, for example, Patent Document 3).

Japanese Utility Model Publication No. 5-71045 JP 2009-122272 A JP 2008-89627 A

  In the conventional electric horn in which the foreign matter intrusion preventing member is fixed to the sound wave outlet opening of the resonance tube with a claw, the strength of the claw is insufficient, and there is a risk of dropping off due to an impact during traveling. Further, since the sound wave outlet opening of the resonance tube has a complicated shape, the shape of the claw is also complicated, and it is not easy to attach the foreign matter intrusion prevention member to the resonance tube.

  Further, the electric horn in which the foreign matter intrusion preventing member extends integrally from the sound wave outlet opening of the resonance tube has the following problems. The resonance tube is integrally formed by molding a resin. However, in order to extend the foreign matter intrusion prevention member integrally from the resonance tube, the mold is complicated and expensive.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide an electric horn for a vehicle that simplifies the assembly and fixing structure of a foreign matter intrusion preventing member to a resonance tube and has no fear of falling off. To do.

  An electric horn for a vehicle according to the present invention, which has been made to solve the above problems, resonates a horn housing, a vibration member fixed to the horn housing that generates sound waves, and a sound wave generated from the vibration member. An electric horn for a vehicle comprising: a resonance tube connected to the horn housing; and a foreign matter entry prevention member that is attached to a sound wave outlet opening of the resonance tube and prevents foreign matter entry into the resonance tube, The sound wave outlet opening of the resonance tube has an inward concave groove for mounting the foreign matter intrusion prevention member on the peripheral edge of the opening, and the foreign matter intrusion prevention member is an outward convex portion inserted in the inward concave groove on the member peripheral edge. It is characterized by providing.

  In the above-described electric horn for a vehicle, the sound wave outlet opening is a rectangular opening having at least one side where the inward concave groove is not formed, and the foreign matter entry preventing member is substantially the same as the rectangular opening. Good shape.

  Moreover, it is good to have the backlash prevention means which prevents the backlash of the said foreign material approach prevention member.

  The foreign matter entry prevention member can be assembled simply by inserting the convex portion outwardly arranged at the peripheral portion of the foreign matter entry prevention member into the inward concave groove arranged at the opening peripheral portion of the resonance tube. Is simple.

  Since the outward convex part of the peripheral part of a foreign material approach prevention member engages with the inward concave groove of the peripheral part of a resonance tube, it does not drop out.

  The sound wave outlet opening is a rectangular opening having at least one side on which no inward concave groove is formed, and when the foreign matter entry preventing member has substantially the same shape as the rectangular opening, the foreign matter entry preventing member faces outward. Since the convex portion can be slid sideways from the side where no inward concave groove is formed and inserted into the concave groove, further assembly becomes easier. When the foreign matter intrusion prevention member is of a type having a plurality of waveguides that change the sound wave emitting direction, the sound wave emitting direction can be changed by 180 degrees by inserting the foreign matter intrusion preventing member by rotating it 180 degrees.

  Since the rattling prevention means is provided, it is possible to prevent the foreign matter entry preventing member from rattling.

It is a front view of the electric horn for vehicles concerning the present invention. It is the sectional view on the AA line of FIG. It is a fragmentary sectional view of the electric horn for vehicles concerning the present invention attached to the front part of vehicles downward. It is an exploded perspective view of the electric horn for vehicles concerning the present invention. It is a fragmentary perspective view of the foreign material approach prevention member in FIG. FIG. 6 is a sectional view taken along line B-B in FIG. 5. It is CC sectional view taken on the line of FIG. It is a front view of the foreign material approach prevention member of a modification.

  Embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the electric horn 1 for a vehicle according to the present invention is configured by attaching a foreign matter entry preventing member 26 to a sound wave outlet opening 25 b of a resonance tube 25. In the electric horn 1 for a vehicle, a sound wave outlet opening 25b is attached to the front part of the vehicle in a downward direction (−Y direction) in order to prevent foreign matter entering from the front of the vehicle (Z direction) (sound wave outlet opening 25b). Facing the ground GL).

  2 is a cross-sectional view taken along line AA in FIG. In FIG. 2, reference numeral 10 denotes a horn housing that houses an electromagnet 12, a fixed iron core 21, and others that vibrate the plate-like vibrating member 11.

  The electromagnet 12 is provided with a coil 14 wound around a bobbin 13, and a lower portion of the movable iron core 15 is disposed in a central hole portion of the bobbin 13. At the upper part of the movable iron core 15, the central part of the vibration member 11 is fixed by caulking. The outer peripheral end of the vibration member 11 is fastened and fixed to the outer peripheral end of the horn housing 10.

  The outer peripheral end portion of the housing cover 10a is 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 from above. An opening 10b is provided at the center of the housing cover 10a.

  The resonance tube 25 is fixed to the housing cover 10a, and defines the sound wave emission path 25c with the housing cover 10a. The resonance tube 25 has an inlet opening 25a that partitions a part of one end of the sound wave emission path 25c, and a rectangular sound wave outlet opening 25b that partitions the other end of the ventilation path 25c. The air passage 25c is partitioned in a spiral shape around the inlet opening 25a.

  Since the structure is as described above, the sound wave (air vibration) transmitted from the opening 10b of the housing cover 10a is emitted outward through the air passage 25c.

  As shown in FIGS. 3 and 4, the sound wave outlet opening 25b of the resonance tube 25 has a rectangular shape, and the inwardly recessed groove 25d in which the foreign substance intrusion prevention member 26 is mounted is provided on the three sides of the opening periphery. Is formed in a U-shape. Further, an outward convex portion 26d is formed on the peripheral edge portion of the foreign matter intrusion preventing member 26 having substantially the same shape as the sound wave outlet opening 25b. Therefore, by moving the foreign matter entry prevention member 26 in the direction of arrow E, the outward convex portion 26d is inserted into the inward concave groove 25d, and the foreign matter entry prevention member 26 can be easily assembled.

  In the present embodiment, among the U-shaped concave grooves 25d, the width (b) of the concave grooves parallel to the Z axis is narrower than the width of the concave grooves (a) parallel to the X axis (not shown). ). By setting the width of the concave groove (b) parallel to the Z axis to a width that the convex portion 26d is fitted to, the foreign object entry preventing member 26 is moved in the direction of the arrow E and is moved smoothly. The leading end (c) of the convex portion 26d is fitted into a concave groove (b) parallel to the Z-axis, thereby preventing rattling of the leading end (c) of the convex portion 26d.

  As shown in FIGS. 4 to 6, among the convex portions 26d, the convex portions parallel to the X axis are provided with protrusions (rattle prevention means) 26d1 projecting in the −Y direction near the center. The convex part parallel to the axis does not rattle in the concave groove (A) parallel to the X axis.

  Furthermore, as shown in FIGS. 4, 5 and 7, among the convex portions 26 d, the convex portions parallel to the Z-axis are provided with hooks 26 d 2 protruding in the Y direction near the center, so that the foreign matter entry preventing member 26 is Once assembled, it will not fall out.

  The foreign matter entry preventing member 26 is fixed to the left and right support plates 26b so that the plate-like member 26a forms a predetermined angle θ with respect to the plane (Z direction) including the sound wave exit opening 25b, and the sound wave exit opening A plurality of waveguides 26c are defined to change the sound wave emitting direction (−Y direction) perpendicular to the plane including the portion 25b into the θ direction. And it arrange | positions so that the projection to the plane containing the sound wave exit opening part 25b of the adjacent plate-shaped member 26a may be connected at least.

  Next, the operation will be described. In the electric horn 1, the movable iron core 15 is intermittently attracted to the fixed iron core 21 and vibrates by intermittently energizing the coil 14. When the movable iron core 15 vibrates, the vibration member 11 also vibrates together, and a sound wave (air vibration) is propagated from the opening 10b of the housing cover 24 into the resonance tube 25. The sound wave propagating through the resonance tube 25 reaches the sound wave outlet opening 25b, and is radiated in the θ direction through the waveguide 26c.

  The foreign matter intrusion prevention member 26 is fixed to the support plate 26b so as to form a predetermined angle θ with respect to the plane (Z direction) including the sound wave outlet opening 25b, and includes the sound wave outlet opening 25b. It has a plurality of waveguides 26c that change the sound wave emitting direction (−Y direction) perpendicular to the plane into the θ direction. And since it arrange | positions so that the projection to the plane containing the sound wave exit opening part 25b of the adjacent plate-shaped member 26a may connect at least, the sound wave exit with the high probability of approaching deeply into the resonance tube 25 and reaching the vibration member 11 Foreign matter intrusion from a direction perpendicular to the plane including the opening 25b (Y direction) can be prevented. Further, since the foreign matter intrusion preventing member 26 is attached to the sound wave outlet opening 25b of the resonance tube 25 so that the inclined waveguide 26c faces the vehicle side (−Z direction), the foreign matter entering through the waveguide 26c does not enter. Almost no. This is because many foreign objects fly from the front of the vehicle (Z direction) to the vertical direction (Y direction), but hardly come from the rear of the vehicle (−Z direction).

  In the above embodiment, as shown in FIGS. 3 and 4, the stay 22 for attaching the electric horn 1 to the vehicle is located behind the electric horn 1. However, depending on the vehicle, the stay 22 may be the electric horn 1. It is necessary to attach so that it may be located further forward. That is, in order to avoid interference with the vehicle, in some cases, it is necessary to rotate the electric horn 1 around the axis parallel to the Y direction and attach it. Then, in FIG. 3, since the front of the vehicle is in the −Z direction, the inclined waveguide 26c comes to face front (−Z direction), and it is impossible to prevent the entry of foreign matters flying from the front. In this case, in FIG. 4, the foreign matter entry preventing member 26 is rotated 180 degrees about the axis parallel to the Y direction and moved in the direction of arrow E, whereby the outward convex portion 26 d is inserted into the inward concave groove 25 d. The foreign matter entry preventing member 26 is assembled. By assembling in this manner, the waveguide 26c comes to face rearward (Z direction), and entry of foreign matters flying from the front can be prevented.

  Since the sound wave outlet opening 25b is a rectangular opening having at least one side where the inward concave groove 25d is not formed, and the foreign matter entry preventing member 26 has substantially the same shape as the rectangular opening 25b, the foreign matter entry preventing member The sound wave emission direction can be changed by 180 degrees by inserting 26 by rotating it by 180 degrees about the axis parallel to the Y direction. As a result, the degree of freedom of attachment of the electric horn 1 to the vehicle increases.

  The foreign matter entry prevention member provided in the electric horn 1 of the present invention is not limited to the above, and may be, for example, a foreign matter entry prevention member 26A shown in FIG. The foreign matter entry preventing member 26A includes a mesh portion 26Aa, a cross-shaped portion 26Ab, and an outwardly projecting portion 26Ad. The mesh portion 26Aa is a substantially rectangular plate having a mesh on the entire surface, and the mesh size is 250 mesh.

  Further, as shown in FIG. 8B, a foreign matter entry preventing member 26A may be used which closes the right half where foreign matter is likely to enter. Further, the left half need not be provided with a mesh.

DESCRIPTION OF SYMBOLS 1 ... Electric horn 10 ... Horn housing 11 ... Vibration member 25 ... Resonance tube 25b ... Sound wave exit opening 25d ... Inward groove 26 ... Foreign matter entry prevention member 26d ... Outward convex part 26d1 ... Prevention means with backlash

Claims (3)

A horn housing, a vibration member fixed to the horn housing for generating sound waves, a resonance tube connected to the horn housing for resonating sound waves generated from the vibration member, and a sound wave outlet opening of the resonance tube A vehicular electric horn having a foreign matter entry preventing member mounted and preventing foreign matter entry into the resonance tube,
The sound wave outlet opening of the resonance tube has an inwardly recessed groove for mounting the foreign matter intrusion preventing member on the periphery of the opening, and the foreign matter intrusion preventing member is an outwardly convex member inserted in the inwardly recessed groove on the periphery of the member. An electric horn for a vehicle comprising a portion.   The said sound wave exit opening part is a rectangular opening part provided with at least one edge | side in which the said inward concave groove is not formed, The said foreign material approach prevention member is substantially the same shape as the said rectangular opening part. Electric horn for vehicles.   The electric horn for a vehicle according to claim 1 or 2, further comprising backlash prevention means for preventing backlash of the foreign matter entry prevention member.

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