JP2006308838A - Small-sound alarm system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sound alarm system capable of sounding for a pedestrian or bicycle rider with sound volume which is not unnecessarily large, but large enough to attract attention. <P>SOLUTION: The small-sound alarm system comprises a small-sound alarm independent of an existent alarm system, a relay, and a switch, and the sound pressure level of the small-sound alarm is set to 60 to 100 dB(A), preferably, 70 to 90 dB(A). The small-sound alarm system is independent of the existent alarm system and uses the switch which is totally different from the one used for the existent alarm system. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a weak sound alarm system, and more particularly to a sound alarm system mounted on an automobile, which is composed of a weak sound alarm, a relay, and a switch independent of an existing alarm sound system. The present invention relates to a weak sound alarm system characterized in that the sound pressure level of the sound alarm is set lower than that of an existing sound alarm system. The sound pressure level is set within the range of 60 dB (A) to 100 dB (A), preferably within the range of 70 dB (A) to 90 dB (A). is there. In addition, the switch of the weak sound alarm system can be provided on any one of a handle, a dashboard, a center console, and a driver side door.

  An example of a very general configuration of a conventional automobile alarm system hs is shown in FIG. In FIG. 8, b is an on-vehicle battery, r is a relay composed of a coil c and a relay switch rsw, sc is a spiral cable, sw is a switch of the entire system, h1 is a high pitch audible alarm, and h2 is a low pitch audible alarm. It is a vessel.

  The battery b has a normal voltage of 12V, and the sound alarms h1 and h2 are both configured to operate at the voltage of 12V. The basic frequency of the high pitch horn h1 is about 420 Hz, and the basic frequency of the low pitch horn h2 is often about 350 Hz. Two kinds of horns of high pitch and low pitch are sounded simultaneously. The reason for combining the two types of horns of high pitch and low pitch in this way is the richness of the timbre, and if there is only one type, it will inevitably be a simple timbre, so normally there are two types of high pitch and low pitch. The horn is built in as a set. However, some light vehicles have only one type of alarm. Further, the sound pressure level of the alarm devices h1 and h2 is normally set to about 110 dB.

  The horns h1 and h2 are usually mounted near the inside of a radiator grille (not shown) at the front of the car, and the switch sw is installed in the center of the driver's handle HD as shown in FIG. ing. The spiral cable sc is a known technique as seen in Patent Document 2 below, and is a configuration for sending a signal from the switch sw to the relay r without being affected by the rotation of the handle. If the system is provided in the part, the spiral cable sc is unnecessary.

  The operation of the normal alarm system hs in FIG. 8 is as follows. First, when the driver feels that it is necessary to sound the alarm sound h1, h2, the driver presses the switch sw. Then, the switch sw is energized, and the signal is transmitted to the relay r through the spiral cable sc. The coil c is energized in the relay r, the relay switch rsw is closed by the electromagnetic induction action, the current from the battery b flows into the sound alarms h1 and h2, and the sound alarms h1 and h2 sound. The horns h1 and h2 keep ringing while the driver continues to press the switch sw.

  When the driver wants to stop the sound alarms h1 and h2, the driver stops pressing the switch sw. Then, the switch sw is turned off, the energization to the coil c in the relay r is cut off, the relay switch rsw is opened, and the current from the battery b does not flow to the alarm devices h1, h2, and the alarm devices h1, h2 The action is stopped.

Since the normal alarm system hs is configured as described above, the driver keeps pressing the switch sw only while he / she wants to sound the alarms h1 and h2.
When the horn sound system hs is used, most of them warn of danger to vehicles other than their own. For example, it is assumed that an oncoming vehicle is sounded in a curved part of a narrow mountain road without a curve mirror. Or, a warning may be issued to a car that changes the oblique line forcibly on an urban road. In such a case, the driver continuously presses the switch sw for a time during which it is determined that it is necessary to warn the other vehicle of the danger, while the alarms h1 and h2 are at the rated sound pressure. Continue to ring at the level.

  However, for example, in a narrow alley in an urban area, when you want to emit a warning sound for pedestrians and bicycles that are in front of you (accurately a bicycle driver, but will be referred to simply as a bicycle below) In many cases, in the conventional alarm system hs, the sound pressure level is too high to be difficult to use. If the alarm system hs is operated continuously for a certain time, as in the case of a car-to-car, a pedestrian or bicycle may be surprised, and an elderly pedestrian or bicycle may even fall. In addition, since there are many quiet places in narrow alleys of the city, if the normal alarm system hs that has a sound pressure level set so that it can be heard sufficiently even on a noisy road with many vehicles, it will cause noise pollution. .

  Therefore, some drivers of automobiles are forced to sound a horn for pedestrians and bicycles, and when the switch sw is momentarily pressed, the horns h1 and h2 are briefly turned off. Many people use the method of ringing. However, the sound pressure level of horns h1 and h2 is too high for pedestrians and bicycles, so that elderly people, weak pedestrians and bicycles are surprised and fall down. There is a risk that it may lead to unforeseen circumstances such as accidents.

  In addition, when the driver of the vehicle is unfamiliar, it is often difficult to make it sound instantaneously, such as when it does not sound at all, or when it does not sound, it is pushed too hard and it sounds longer. Or, since the sensing performance of the switch sw is slightly different depending on the type of automobile, even if it sounds well instantaneously in a vehicle that you are used to, it may not sound well if you ride an unfamiliar vehicle.

  In view of the above circumstances, there is a demand for a sound alarm system that operates reliably with respect to pedestrians and bicycles rather than a very high volume, that is, a weak sound alarm system. And this weak sound alarm system can be clearly distinguished from the normal alarm sound system, and is used only for pedestrians and bicycles. It is desirable that the sound pressure level be sufficient not to surprise the pedestrian or the bicycle even if it is sounded for a long time, and to sufficiently act as a warning sound for the pedestrian or the bicycle.

Conventionally, a sounding device in which a sounding volume and a sounding color change depending on how the sounding device switch is pressed has been disclosed. This is a “vehicle alarm device in which the alarm color and the alarm volume change due to the pressing pressure of the alarm switch” described in Patent Document 1, and according to the present invention, the alarm switch is used as a pressing force detector. The conventional alarm sound is detected by detecting the pressing pressure of the alarm switch of the vehicle driver and controlling the sound generation control device according to the detected information, thereby driving the sound generator and changing the sound volume and sound color. Two disadvantages of the container system,
I. Giving unnecessary noise around when used in narrow alleys.
B. When a warning is given to pedestrians, especially elderly people and small children, the sound may be surprised and dangerous.
It is said that it was made to solve the problem.

  That is, the object of the invention of Patent Document 1 is substantially the same as the object of the present invention. However, it must be pointed out that the invention of Patent Document 1 has the following problems. That is, according to the invention of Patent Document 1, since the sound volume and sound color change depending on how the sounder switch is pressed, the sounder is used to some extent in order to properly use this system in accordance with the purpose. Proficiency in pressing the switch is required. In addition, even if you are proficient, it is a system that uses the same horn switch to change the volume with a single press, so in some cases it may unnecessarily loudly sound for pedestrians and bicycles. Or, conversely, other automobiles that require a high volume may not be able to sound at a sufficient volume.

  It is dangerous to make a loud sound for pedestrians and bicycles, and it is also a noise pollution, but if a loud sound is not produced when a loud sound is required for other cars, it will lead to a serious accident. There is a risk. In other words, the invention of Patent Document 1 has a fatal flaw that envisages the possibility that the alarm function for preventing accidents, which is the original function of the alarm system, will not operate sufficiently. It must be pointed out.

As a cause of this, it must be said that there is a problem in the basic idea of the invention of Patent Document 1 in which the same switch is used to sound from a large volume to a small volume. Therefore, a conventional alarm system having an alarm pressure level of about 110 dB (A) is kept as it is, and a separate weak sound is separated from the conventional alarm system. There is a need to configure a horn system. The weak sound alarm system of this invention is made | formed from such a request | requirement.
JP 2001-356786 A Japanese Patent Laid-Open No. 7-231549 Pamphlet edited and published by the Japan Environment Association “Considering Noise and Vibration in the Living Environment” December 25, 1990

From the above, the subject of the present invention was set as follows.
<Problem 1>
We will develop a low-pitched sound alarm system that can be used to alert pedestrians and bicycles at a volume that is not surprising and that is sufficient to alert them.
<Problem 2>
The weak sound alarm system is completely independent from the existing alarm system in the vehicle, and the switch for the driver to sound the alarm is completely different from the switch of the existing alarm system. This switch shall be used.

The present invention has been made to solve the above problems, and provides the following means for solving the problems.
<Solution 1>
A sound alarm system to be mounted on an automobile, which is composed of a weak sound alarm, a relay and a switch independent of the existing sound alarm system, and the sound pressure level of the weak sound alarm is the alarm of the existing alarm system. A low sound alarm system characterized in that it is set lower than the sounder.
<Solution 2>
The weak sound horn system according to Solution 1, wherein the sound pressure level of the weak sound horn is set in a range of 60 dB (A) to 100 dB (A).
<Solution 3>
The sound audible alarm system according to Solution 2, wherein the sound pressure level of the weak audible alarm is set within a range of 70 dB (A) to 90 dB (A).
<Solution 4>
4. The weak sound alarm system according to Solution 1 or Solution 2 or Solution 3, wherein the weak sound alarm is composed of a low pitch weak sound alarm and a high pitch weak sound alarm.
<Solution 5>
5. The weak sound alarm system according to the solution 1, the solution 2, the solution 3, or the solution 4, wherein the switch of the weak sound alarm system is attached to a part of the handle.
<Solution 6>
5. The weak sound alarm system according to Solution 1 or Solution 2, or Solution 3 or Solution 4, wherein the switch of the weak sound alarm system is attached to a part of the dashboard.
<Solution 7>
The weak sound alarm system according to Solution 1 or Solution 2 or Solution 3 or Solution 4, wherein the switch of the weak sound alarm system is attached to a part of the center console.
<Solution 8>
The weak sound alarm system according to Solution 1 or Solution 2 or Solution 3 or Solution 4, wherein the switch of the weak sound alarm system is attached to a part of the door on the driver's seat side. .

  The grounds for limiting the numerical value of the sound pressure level of the low sound audible alarm described in Solution 2 and Solution 3 of the present invention will be described below. FIG. 9 shows a diagram “example of noise magnitude” described in the pamphlet “Noise and Vibration in Living Environment” (Non-Patent Document 1) edited and published by the Japan Environment Association. According to this figure, the sound pressure level of the car horn (2 m ahead) is 110 dB (A). Note that the unit dB representing the sound pressure level is normally used after being corrected by a frequency, and in this case, it is expressed as dB (A) (reading is decibel a or decibel ray). In the present application, the unit of dB (A) is used as the sound pressure level of the alarm. Details are described in detail on page 3 of the pamphlet of Non-Patent Document 1 described above, and that part is shown in FIG.

  As can be seen from FIG. 9, when the sound pressure level exceeds 100 dB (A), the volume becomes louder than that under the guard when the train passes, and a sense of pressure that is not much different from the sound pressure level of a normal alarm system is heard. Can give to things. Therefore, a numerical value of 100 dB (A) is first given as the upper limit value of the sound pressure level of the weak sound horn in the weak sound horn system of the present invention.

  However, at this upper limit value of 100 dB (A), it is felt that the sound is still too loud for use in a particularly quiet residential area, and therefore a more desirable upper limit value obtained by lowering the sound pressure level slightly from 100 dB (A) is obtained. If so, 90 dB (A) which is a sound pressure level in a loud singing or noisy factory can be mentioned. In quiet residential areas, the volume exceeding “singing loudly” is also a noise pollution, and the pedestrians and bicycles that were struck are also surprising.

  On the other hand, to obtain the lower limit value, first, 60 dB (A), which is the sound pressure level of ordinary conversation, can be cited. It is clear that a warning horn with a sound level lower than that of a normal conversation does not make a warning meaning, so the sound pressure level of a weak horn cannot be lowered below 60 dB (A). . However, in noisy shopping streets, it is possible that the sound pressure level of ordinary conversation will not be used for warning, so if you want a more desirable value for the lower limit, it is the sound pressure level of the telephone bell 70 dB (A) would be appropriate. If the sound level is higher than the sound level of the telephone bell, it can be heard well in noisy shopping streets.

  From the above-mentioned concept, in the numerical limitation of the sound pressure level of the weak sound alarm described in Solution 2 of the present invention, the sound pressure level is within the range of 60 dB (A) to 100 dB (A), and described in Solution 3 The numerical value of the sound pressure level of the weak sound alarm is limited to the range of 70 dB (A) to 90 dB (A), but when actually commercialized, the sound pressure level is around 80 dB (A). Seems to be appropriate. According to FIG. 9, the sound pressure level of 80 dB (A) is the sound pressure level in the subway car. If a weak beep is sounded at such a sound pressure level, it will surprise pedestrians and bicycles. And the meaning of the warning can be fully communicated.

  Also, the place where the low-pitched sounding device is installed may be the back side of the radiator grill at the front of the automobile, as in the case of the existing sounding device. In addition, the switch can be installed on the steering wheel, dashboard, center console, driver's side door, etc., but in any case, it should be installed independently so as not to make a mistake with the switch of the existing alarm system. It is important that

  According to the invention of Solution 1 of the present invention, the sound pressure level of a low-noise sounder is set lower than that of an existing sound signal system, which is a warning sound system mounted on an automobile. Therefore, it is possible to provide a low-pitched sound alarm system that can be sounded at a volume that is not enough to surprise a pedestrian or bicycle and that is sufficient to call attention.

  Furthermore, because it is composed of a low-pitched sounder, a relay, and a switch that are independent of the existing sounding system, the sounding sounding device will sound reliably without being confused with the existing sounding system during operation. It is something that can be done. In addition, since the existing alarm system is not affected at all by the weak alarm system of the present invention, the alarm function for preventing the car-to-vehicle accident of the existing alarm system is completely this. Can be held. In other words, when operating the existing sound alarm system, the existing sound alarm system can be used as usual without considering the weak sound alarm system of the present invention at all. In this way, by making it independent from the existing alarm system, mutual interference can be completely eliminated, and it can be used independently only for each purpose.

  According to the invention of Solution 2 of the present invention, the sound pressure level of the weak alarm is set in the range of 60 dB (A) to 100 dB (A), so that it is higher than that under the guard when the train passes. The volume is not reduced, and the volume is not lower than normal conversation.

According to the invention of Solution 3 of the present invention, the sound pressure level of the low sound alarm is set within the range of 70 dB (A) to 90 dB (A), so that noise pollution can be achieved even in a quiet residential area. Never be surprised by pedestrians or bicycles. Even in a noisy shopping street, pedestrians and bicycles can be alerted sufficiently as warning sounds.

According to the invention of Solution 4 of the present invention, since the low-pitched sound horn is composed of a low-pitch low-range sound horn and a high-pitch low-range sound horn, it is rich in timbre and may cause discomfort to the listener. Absent.

According to the invention of Solution 5 of the present invention, since the switch of the low sound alarm system is mounted on a part of the handle, it is extremely convenient in operation.

According to Solution 6 or Solution 7 or Solution 8 of the present invention, the switch of the weak sound alarm system is mounted on a part of the dashboard, a part of the center console, or a part of the door on the driver's seat side. Therefore, in addition to the convenience of operation, there is no possibility of being confused with the switch of the existing alarm system that is usually mounted at the center of the steering wheel.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings. In addition, Example 1 is one example of the invention of the solving means 5, Example 2 is one example of the invention of the solving means 6, Example 3 is one embodiment of the invention of the solving means 7, The fourth embodiment is an embodiment of the invention of the solving means 8.

<Configuration of Example 1>
FIG. 1 shows a circuit configuration of a weak sound alarm system HS1 according to the first embodiment. In FIG. 1, 1 is a switch of the entire weak sound alarm system HS1, and 2 is a spiral cable. The spiral cable 2 is necessary when the switch 1 is attached to a part of the handle HD as shown in FIG. 4, but is attached to a place other than the handle HD as shown in FIGS. In such a case, the circuit configuration becomes unnecessary as shown in FIG.

  In FIG. 1, reference numeral 3 denotes a relay, which includes a coil 31 and a relay switch 32. Reference numeral 4 denotes an in-vehicle battery, 5 denotes a high pitch weak sound alarm, and 6 denotes a low pitch weak sound alarm. The spiral cable 2, the relay 3, and the battery 4 have substantially the same configuration as that used in the existing alarm system hs (see FIG. 8).

  The switch 1 is mounted on the right side of the T-shaped portion that supports the steered wheel HDR of the handle HD as shown in FIG. 4 showing the state of the cockpit CP as viewed from the driver's vision. Note that sw is a switch of the existing alarm system hs (see FIG. 8), DB is a dashboard, CC is a center console, and DR is a door on the driver's seat side. Of course, the switch 1 can be mounted on a part of the steering wheel HDR.

  The specifications of the weak sound alarm 5 are a rated voltage of 12 V, a basic frequency of 420 Hz, a sound pressure level of 80 dB (A), and an operating current of 3 A. The specifications of the weak sound alarm 6 are a rated voltage of 12 V, a basic frequency of 350 Hz, a sound pressure level of 80 dB (A), and an operating current of 3 A. As shown in FIG. 1, the weak sound alarms 5 and 6 are connected in parallel, and are configured to sound simultaneously when the switch 1 is on. The weak sound alarms 5 and 6 are disposed on the back side of a radiator grill (not shown) in front of the vehicle.

<Operation of Example 1>
The operation of the weak sound alarm system HS1 according to the first embodiment will be described with reference to FIG. In FIG. 1, when the driver turns on the switch 1, the coil 31 of the relay 3 is energized. At this time, the coil 31 of the relay 3 is energized when the switch 1 is turned on without being affected by the operation state of the handle HD (see FIG. 4) due to the action of the spiral cable 2.

  When the coil 31 of the relay 3 is energized, the relay switch 32 is closed by the electromagnetic induction action, and the relay 3 is turned on. Here, the circuit connecting the battery 4 and the weak sound horns 5 and 6 is closed, the current from the battery 4 flows to the weak sound horns 5 and 6, and the weak sound horns 5 and 6 are simultaneously operated.

  When the driver stops pressing the switch 1, the switch 1 is turned off, the coil 31 of the relay 3 is deenergized, the relay switch 32 is opened, and the current from the battery 4 flows to the low sound alarms 5 and 6. The operation of the weak sound alarms 5 and 6 is stopped. That is, the beep audible alarms 5 and 6 continue to sound only while the driver is pressing the switch 1.

  The position of the switch 1 is the position shown in FIG. 4. This position is a position where the driver can easily operate with the thumb of the right hand while holding the handle HD. Although the switch sw and the switch 1 of the existing alarm system hs are close to each other, the areas of the switch sw and the switch 1 are largely different from each other, so that they are not confused. Furthermore, if the height of the outer edge portion 11 of the switch 1 is configured to be slightly higher, it is possible to prevent an error that the switch sw is intended to push the switch 1 or vice versa.

  FIG. 2 shows a circuit configuration of a weak sound horn system HS1 ′ in which the low pitch weak sound horn 6 is removed in the weak sound horn sound system HS1 of the first embodiment. The weak sound horn system HS1 ′ is merely the same as the weak sound horn sound system HS1 shown in FIG. Further, the operation is different from the weak sound alarm system HS1 only in that when the switch 1 is pressed, only the high pitch weak sound alarm 5 sounds.

  FIG. 3 shows a circuit configuration of the weak sound alarm system HS2 of the second embodiment. In the weak sound alarm system HS2 according to the second embodiment, since the switch 1 is disposed in a part of the dashboard DB as shown in FIG. 5, the weak sound alarm system HS1 according to the first embodiment (FIG. 1). The other circuit configuration is the same as that of the weak sound alarm system HS1 of the first embodiment except that the spiral cable 2 existing in (see) is not necessary. Also, the operation is slightly the same as the operation of the weak sound alarm system HS1 of the first embodiment although the operability slightly changes from the position of the switch 1 being different.

  In the weak sound alarm system HS2 of the second embodiment, since the switch 1 is disposed in a part of the dashboard DB as shown in FIG. 5, the switch of the existing alarm system hs (see FIG. 1). It is far from sw and there is no confusion between switch 1 and switch sw. The switch 1 is operated by moving the left hand holding the handle HD one end away from the handle HD, but in many cases where the low sound alarm system HS2 is required, the car itself is considered to be in a slow state. Therefore, it is considered that there is no inconvenience or danger in operation.

  The circuit configuration of the weak sound alarm system HS3 of the third embodiment is the same as the circuit configuration of the weak sound alarm system HS2 of the second embodiment as shown in FIG. In addition, the operability of the switch 1 is slightly different from the position where the position of the switch 1 is different from that of the weak sound horn system HS2 of the second embodiment. It is.

  In the weak sound alarm system HS3 of the third embodiment, since the switch 1 is disposed at a part of the center console CC as shown in FIG. 6, the existing alarm system hs (FIG. 1) is the same as the second embodiment. The switch 1 is far from the switch sw and the switch 1 and the switch sw are not confused at all. The switch 1 is operated by separating the left hand holding the handle HD from the handle HD at one end. However, in many cases where the low sound alarm system HS3 is required as in the second embodiment, the vehicle itself is in a slow state. It is considered that there is no inconvenience or danger in operation.

  As shown in FIG. 3, the circuit configuration of the weak sound horn system HS4 of the fourth embodiment is the same as the circuit configuration of the weak sound horn system HS2 of the second embodiment and the weak sound horn system HS3 of the third embodiment. In addition, the operability of the switch 1 is slightly different from that of the second and third embodiments. Basically, the weak sound alarm system HS2 according to the second embodiment and the weak sound alarm according to the third embodiment. The operation is the same as that of the system HS3.

  In the weak sound alarm system HS4 according to the fourth embodiment, the switch 1 is disposed in a part of the driver side door DR as shown in FIG. It is far from the switch sw of the system hs (see FIG. 1), and there is no possibility of confusion between the switch 1 and the switch sw. The switch 1 is operated by separating the right hand holding the handle HD from the handle HD at one end. However, in many cases where the low sound alarm system HS4 is required as in the second and third embodiments, the vehicle itself is slowly driven. Since it is considered to be a state, it is considered that there is no inconvenience or danger in operation.

  Since the present invention is a weak sound alarm system that can be installed as a separate system that is completely independent of the existing alarm system, it can of course be installed in a new car, even in a vehicle currently in use. It can be done relatively easily. Moreover, it can be mounted on any vehicle such as a truck, a bus, and a motorcycle by arranging a little, not limited to a passenger car. If the low sound alarm system of the present invention is installed in many vehicles, pedestrians and bicycles will not be threatened by loud sound alarms, and drivers will be safe with respect to pedestrians and bicycles. A horn can be used, and noise pollution by the horn is also reduced.

It is a circuit block diagram of the weak sound alarm system of Example 1 of this invention. It is a circuit block diagram by another structure of the weak sound alarm system of Example 1 of this invention. It is a circuit block diagram of the weak sound alarm system of Examples 2-4 of this invention. It is a reference perspective view which shows the arrangement | positioning location of the switch of the weak sound alarm system of Example 1 of this invention. It is a reference perspective view which shows the arrangement | positioning location of the switch of the weak sound alarm system of Example 2 of this invention. It is a reference perspective view which shows the arrangement | positioning location of the switch of the low sound alarm system of Example 3 of this invention. It is a reference perspective view which shows the arrangement | positioning location of the switch of the low sound alarm system of Example 4 of this invention. It is a circuit block diagram of an example of the conventional alarm system. It is a reference figure which shows the example of the magnitude of noise. It is a reference figure explaining the meaning of dB (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Switch 11 Outer edge part 2 Spiral cable 3 Relay 31 Coil 32 Relay switch 4 Battery 5 Low sound alarm 6 Low sound alarm CC Center console CP Cockpit DB Dashboard DR Door HD Handle HDR Steering wheel HS1 Low sound alarm system HS2 Low sound Audible alarm system HS3 weak audible alarm system HS4 weak audible alarm system HS1 'weak audible alarm system b battery c coil h1 audible alarm h2 audible alarm hs audible alarm system r relay rsw relay switch sc spiral cable sw switch

Claims (8)

  A sound alarm system to be mounted on an automobile, which is composed of a weak sound alarm, a relay and a switch independent of the existing sound alarm system, and the sound pressure level of the weak sound alarm is the alarm of the existing alarm system. A low sound alarm system characterized in that it is set lower than the sounder. The sound pressure level of the weak sound alarm is set in a range of 60 dB (A) to 100 dB (A), the weak sound alarm system according to claim 1. The sound pressure level of the weak sound alarm is set within a range of 70 dB (A) to 90 dB (A), the weak sound alarm system according to claim 2.   4. The weak sound alarm system according to claim 1, wherein the low sound alarm is composed of a low pitch weak sound alarm and a high pitch weak sound alarm.   5. The weak sound alarm system according to claim 1, wherein the switch of the weak sound alarm system is attached to a part of the handle.   The weak sound alarm system according to claim 1, claim 2, claim 3, or claim 4, wherein a switch of the weak sound alarm system is attached to a part of the dashboard.   The weak sound alarm system according to claim 1, claim 2, claim 3, or claim 4, wherein a switch of the weak sound alarm system is attached to a part of the center console. 5. The weak sound alarm system according to claim 1, wherein the switch of the weak sound alarm system is attached to a part of a door on the driver's seat side. .