Sound emitter

Abstract

To provide a sound emitter configured to alert a pedestrian, as necessary, that its own vehicle is approaching.SOLUTION: A sound emitter, configured to emit sound when it contacts and is flipped by a spoke of a rotating wheel, includes: a sound emitting body movably disposed between a sound emitting position in which a distal end portion contacts the spoke and emits sound and a sound-muffling position in which the distal end portion separates from the spoke and does not emit sound; and a holding body holding the sound emitting body on a frame so as to rotate the sound emitting body around the frame supporting the wheel so as to rotate the wheel. The sound emitting body contacts the spoke at an acute angle with respect to the rotation direction at the sound emitting position, and is thereby consecutively flipped by the rotating spoke to emit sound continuously.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a sound generating device. [Background technology]

[0002] A vehicle approach warning device and a vehicle equipped with the vehicle approach warning device are known, in which a sound-producing body extending from a vehicle component toward the road surface on which the vehicle runs is attached to the vehicle component so that it can be brought into contact with and separated from the road surface (Patent Document 1).

[0003] A bicycle with a music box is also known in which the sound-producing member of the music box, which consists of a sound-producing member with multiple diaphragms that make sound when flicked and an operating member with multiple protrusions for flicking each of the diaphragms, is attached to a frame for supporting the bicycle wheel, while the operating member for the music box is attached to the side of the bicycle wheel in a position where it can flick the diaphragms, so that the music box plays when the wheel is rotated (Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-20736 A [Patent Document 2] Japanese Patent Application Publication No. 4-293691 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention provides a sound generating device that notifies pedestrians of the approach of the vehicle as required. [Means for solving the problem]

[0006] In order to solve the above problem, the sound generating device according to claim 1 comprises: A sound-producing device that produces sound by being struck by the spokes of a rotating wheel, a sound generating body that is movable between a sound generating position where a tip portion of the sound generating body contacts the spoke to generate sound and a sound silencing position where the tip portion of the sound generating body is separated from the spoke to generate sound; a frame that rotatably supports the wheels, and a holder that rotatably holds the sound generating body around the frame, It is characterized by:

[0007] The invention described in claim 2 is the sound generating device described in claim 1, The sound generating body generates sounds successively by being struck by the rotating spoke at the sound generating position at an acute angle to the rotation direction of the spoke. It is characterized by:

[0008] The invention described in claim 3 is the sound generating device described in claim 2, The sound volume of the sound generating body is changed by changing the angle at which the sound generating body abuts against the spoke. It is characterized by:

[0009] The invention described in claim 4 is the sound generating device described in any one of claims 1 to 3, The sound generating body is replaceably held by the holder. It is characterized by:

[0010] The invention described in claim 5 is the sound generating device described in any one of claims 1 to 3, The sound generating body and the holding body are integrally formed using a synthetic resin material. It is characterized by: Effect of the Invention

[0011] According to the invention recited in claim 1, it is possible to notify pedestrians of the approach of one's own vehicle as necessary.

[0012] According to the invention as recited in claim 2, the sound can be produced stably by contacting the spokes without interfering with the rotation of the wheel.

[0013] According to the invention described in claim 3, the volume of the sound can be changed as necessary.

[0014] According to the invention as recited in claim 4, the sound generating body can be replaced as required.

[0015] According to the invention as set forth in claim 5, the sound generation device can be further simplified. [Brief description of the drawings]

[0016] [Figure 1] 1 is a diagram showing a bicycle equipped with a sound generation device according to an embodiment of the present invention; [Diagram 2] FIG. 2A is a front view showing the sound generation device according to the present embodiment, and FIG. 2B is a schematic plan sectional view showing the sound generation device according to the present embodiment. [Diagram 3] FIG. 2A is a schematic cross-sectional plan view showing the sound generation device located at the sound generation position, and FIG. 2B is a schematic cross-sectional plan view showing the sound generation device located at the silencing position. [Figure 4] 3 is a schematic cross-sectional plan view illustrating sound production by the sound production device. FIG. [Diagram 5] 11 is a schematic cross-sectional plan view illustrating adjustment of the volume of sound produced by the sound producing device. FIG. [Figure 6] 13 is a schematic cross-sectional plan view showing a sound generation device according to a modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The present invention will now be described in more detail with reference to the drawings, showing embodiments and specific examples, but the present invention is not limited to these embodiments and specific examples. In addition, in the following description using the drawings, the drawings are schematic, and elements other than those necessary for the description are omitted as appropriate for ease of understanding.

[0018] (1) Structure of the sound generating device FIG. 1 is a diagram showing an example of a bicycle 100 equipped with a sound producing device 1 according to this embodiment, FIG. 2(a) is a front view showing the sound producing device 1 according to this embodiment, (b) is a schematic planar cross-sectional view showing the sound producing device 1 according to this embodiment, FIG. 3(a) is a schematic planar cross-sectional view showing the sound producing device 1 positioned at the sound producing position, and (b) is a schematic planar cross-sectional view showing the sound producing device 1 positioned at the silencing position. The sound generation device 1 according to this embodiment will be described below with reference to the drawings.

[0019] The sound producing device 1 comprises a sound producing body 10 that produces sound when its tip 10a comes into contact with a spoke SP of a wheel 110 and is bounced off, and a frame FR that rotatably supports the wheel 110, and a holder 20 that rotatably holds the sound producing body 10 around the frame FR. The sound generating device 1 is attached to the frame FR of the bicycle 100 so that it can notify pedestrians of the approach of the bicycle as necessary.

[0020] (1.1) Sound body 2, the sounding body 10 is a thin plate-like member that extends in the length direction and is elastically deformable, i.e., flexible, starting from a base end 10b, and is made of, for example, synthetic resin. Specifically, the sounding body 10 is a thin plate-like member that is attached to the bicycle frame FR by a holder 20 and has a length L of 50 mm to 150 mm so that the tip end 10a can reliably contact the spokes SP of the wheel, a width W of 5 mm to 10 mm so that the tip end 10a can reliably contact the spokes SP of the wheel 110, and a thickness T of 1 mm to 2 mm so that the tip end 10a can bend in contact with the spokes SP of the wheel. The synthetic resin material may be selected in terms of its quality, hardness, etc., taking into consideration durability, sound volume, friction with the spokes SP, etc. For example, POM (polyacetal) is suitable from the standpoint of mechanical properties, wear properties, cost, etc.

[0021] (1.2) Holder The holder 20 supports the two half-split members 20A, 20B, whose inner surfaces 20Aa, 20Ba are formed in a concave shape to conform to the shape of the frame FR of the bicycle 100, at one end 20a so as to be openable and closable, and the base end 10b of the sounding body 10 is sandwiched at the other end 20b and fixed with a screw S, thereby holding the sounding body 10 to the frame FR. Since the base end 10b of the sounding body 10 is sandwiched between the two half-split members 20A, 20B constituting the holder 20 and fixed with a screw, the sounding body 10 can be replaced with another sounding body 10 as necessary. For example, if the sounding body 10 is used for a long period of time in contact with the spokes SP and the tip end 10a is worn, it can be replaced with a new unused sounding body 10 and used. In addition, the sound volume can be changed by replacing it with a sounding body 10 having a different thickness T.

[0022] For the concave inner surfaces 20Aa, 20Ba of the half members 20A, 20B, it is preferable to use a material 21, such as rubber, elastomer resin, etc., that has a certain degree of elasticity to conform to the shape of the frame FR and has a certain degree of friction between the frame FR. This allows the holder 20 to be stably fixed so as to easily conform to the shape of the frame FR, and the fixed position of the holder 20 will not shift even if vibrations are applied while the bicycle 100 is in motion.

[0023] (1.3) Installation of sound generating device The sound generating body 10 is attached to the frame FR of the bicycle 100 by a holder 20 so as to be rotatable around the frame FR, with the tip portion 10a facing the spoke SP of the wheel 110. Specifically, the sound generating body 10 is attached to the frame FR of the bicycle 100 by a holder 20 so as to be movable between a sound generating position (shown in Figure 3(a)) where the tip portion 10a comes into contact with the spoke SP of the wheel to generate sound, and a sound silencing position (shown in Figure 3(b)) where the tip portion 10a is separated from the spoke SP of the wheel and does not generate sound.

[0024] (2) Function of the sound generating device FIG. 4 is a schematic cross-sectional plan view for explaining sound production by the sound production device 1, and FIG. 5 is a schematic cross-sectional plan view for explaining adjustment of sound production by the sound production device 1. As shown in FIG. As shown in FIG. 3(a), the sound producing body 10 produces sounds successively by being struck in succession by the spokes SP of the wheel 110 which rotate in contact with the sound producing position at an acute angle (see θ in FIG. 3(a)) with respect to the rotational direction (indicated by arrow R in FIG. 3) of the spokes SP of the wheel 110.

[0025] As shown in FIG. 1, the spokes SP of the wheel 110 are paired together, with each pair crossing each other between the rim 111 and the hub 112 of the wheel 110, connecting the hub 112 and the rim 111. When the wheel 110 rotates, as indicated by the arrow R in FIG. 4, the sound generating body 10 is in a state where the tip portion 10a is in elastic contact with the pair of spokes SP1 (see FIG. 4(a)). As shown by the arrow R in FIG. 4, the tip portion 10a moves away from the pair of spokes SP1 and is released from the flex (see FIG. 4(b)), and is in elastic contact with the pair of adjacent spokes SP2 (see FIG. 4(c)). At this time, the sound generating body 10 is bounced by the pair of spokes SP1 and comes into elastic contact with the pair of adjacent spokes SP2, thereby generating sound. When the wheel 110 rotates, each pair of spokes SP1, SP2, SP3, ... bounces the sound generating body 10 to generate sound continuously. In this way, the sound generating device 1 can stably generate sound by elastically contacting the spokes SP without interfering with the rotation of the wheel 110.

[0026] The sound volume of the sounding body 10 changes by changing the angle θ at which the sounding body 10 abuts against the spoke SP of the wheel 110. Specifically, as shown in FIG. 5(a), when the tip 10a of the sounding body 10 is in contact with the spoke SP, as shown in FIG. 5(b), the holder 20 is rotated around the frame FR in a direction in which the sounding body 10 approaches the spoke SP (see the arrow in FIG. 5(b)), the tip 10a of the sounding body 10 is bent, the contact pressure between the tip 10a and the spoke SP increases, and the flicking sound of the spoke SP becomes louder. Similarly, as shown in FIG. 5(c), when the holder 20 is rotated around the frame FR in a direction in which the sounding body 10 moves away from the spoke SP (see the arrow in FIG. 5(c)), the deflection of the tip 10a of the sounding body 10 becomes smaller, the contact pressure between the tip 10a and the spoke SP decreases, and the flicking sound of the spoke SP becomes quieter. In this way, the sound production device 1 can adjust the volume of the sound produced by changing the angle θ at which the sound production device 1 abuts against the spokes SP of the wheel 110 in accordance with the noise conditions around the vehicle. In addition, by rotating the retaining body 20 around the frame FR in a direction in which the sound producing body 10 moves away from the spoke SP, the contact pressure between the tip 10a of the sound producing body 10 and the spoke SP can be reduced, thereby suppressing damage to the spoke SP caused by the sound producing body 10.

[0027] "Variations" FIG. 6 is a schematic cross-sectional plan view showing a sound generation device 1A according to a modified example. In the sound producing device 1A according to the modified example, the sound producing body 10A and the holder 10B are integrally formed using a synthetic resin material, and are attached to the frame FR of the bicycle 100 via a material 21A having a certain degree of friction. One example of such a sound producing device 1A is a tie wrap band 50.

[0028] As shown in Figure 6, the fastening portion 51 of the tie wrap band 50 is wrapped around the frame FR of the bicycle 100, the tip side 51a of the tie wrap band 50 is inserted through the insertion hole 52 and the tip side 51a is pulled, and the fastening portion 51 fastens and fixes the frame FR. As a result, the tip side 51a of the fastening and fixing portion 51 extending from the insertion hole 52 in the longitudinal direction of the tie-wrap band 50 becomes the sound-making body 10A that makes sound by contacting the spoke SP of the wheel 110, and the fastening and fixing portion 51 that is wrapped around the frame FR and fastens the frame FR becomes the retaining body 10B.

[0029] In this way, by wrapping the tie-wrap band 50 around the frame FR of the bicycle 100 and fastening it, it is possible to obtain the sound generation device 1A in which the sound generation body 10A and the holding body 10B are integrally formed using a synthetic resin material. According to the sound generation device 1A of the modified example, it is possible to further simplify the sound generation device. [Explanation of symbols]

[0030] 1, 1A... Sound generating device 10, 10A... sound-producing body, 10a... tip portion, 10b... base end portion 20, 20B... Holding body, 20A, 20B... Half-split member, 50 : tie wrap band, 51 : fastening portion, 52 : insertion hole 100···bicycle, 110···wheel, 111···rim, 112···hub, FR···frame, SP···spoke

Claims

1. A sound-producing device that produces sound by being struck by the spokes of a rotating wheel, a sound generating body that is movable between a sound generating position where a tip portion of the sound generating body contacts the spoke to generate sound and a sound silencing position where the tip portion of the sound generating body is separated from the spoke to generate sound; a frame that rotatably supports the wheels, and a holder that rotatably holds the sound generating body around the frame, A sound producing device characterized by:

2. The sound generating body generates sounds successively by being struck by the rotating spoke at the sound generating position at an acute angle to the rotation direction of the spoke.

2. The sound generating device according to claim 1 .

3. The sound volume of the sound generating body is changed by changing the angle at which the sound generating body abuts against the spoke.

3. The sound generating device according to claim 2.

4. The sound generating body is replaceably held by the holder.

4. The sound generating device according to claim 1, wherein the sound generating device is a sound generating device.

5. The sound generating body and the holding body are integrally formed using a synthetic resin material.

4. The sound generating device according to claim 1, wherein the sound generating device is a sound generating device.

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