JP2010175662A - Auditory information providing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auditory information providing device with excellent dust proof and water proof performance, capable of improving sound pressure of sound output by sound generator. <P>SOLUTION: A combination meter 1 for vehicles includes a case 10, a facing 4 and a front glass 5. A sound generator storage section 15 is provided in the case 10. The sound generator storage section 15 accommodates a buzzer 20 inside, and includes a first aperture section 17 which opens to a front face 10a of the facing 4 side of the case 10, and everything other than the first aperture section 17 is closed. A sound guide section 45 is provided in the facing 4. The sound guide section 45 is connected to the first aperture section 17, and includes a second aperture section 46 which opens to the front glass 5, and everything other than the second aperture section 46 is closed. A gap 54 which opens to a rear face 10b which is separated from the facing 4 of the case 10, is provided between the front glass 5 and the second aperture section 46. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an auditory information providing apparatus that is mounted on a moving body such as an automobile or a ship and informs a passenger of the moving body of various types of information by sound generated by a sounding body such as a buzzer, a speaker, or a relay.

  A moving body such as an automobile or a ship is equipped with an instrument device that displays information measured by various measuring means to passengers of the moving body. As such an instrument device, for example, an analog type device using a pointer is known, and the information is made visible to a passenger of a moving body. Furthermore, the instrument device includes a sounding body such as a buzzer, a speaker, or a relay, and there is a device that notifies the occupant of the information or the like by a sound (sound) generated by the sounding body (see, for example, Patent Documents 1 to 6). Hereinafter, an instrument device having a sounding body is referred to as an auditory information providing device.

  The auditory information providing apparatus described in Patent Documents 1 to 3 includes a case in which a printed wiring board mounted with a movement or a sounding body that rotates a pointer is housed, a front glass that covers the case, a case and a front glass It has a payback placed between them. The case includes a case main body disposed on the occupant side and a back cover disposed on the side away from the occupant and attached to the case main body.

  The sounding body is mounted on the surface of the printed wiring board on the side away from the occupant and accommodated in the case. Further, the auditory information providing apparatus is provided with a hole for transmitting to the occupant with sufficient sound pressure through the sound generated by the sounding body. The hole is provided through the back cover and opens toward the passenger.

  In the auditory information providing apparatus described in Patent Document 4, holes through which sound produced by the sounding body is passed are provided in the printed wiring board, the case main body, and the turn, respectively, and these holes communicate with each other. And the hole provided in return is opened toward the passenger | crew side.

  In the auditory information providing apparatus described in Patent Documents 5 and 6, the sounding body is mounted on the surface of the printed wiring board on the passenger side. A cylindrical sound guide member is connected to the case body. One end of the sound guide member is overlapped with the printed wiring board to position the sounding body on the inner side, and the other end is opened toward the occupant to transmit the sound emitted by the sounding body to the occupant through the inner side.

JP 2007-69886 A JP 2008-207658 A JP 2008-290590 A Japanese Patent Laid-Open No. 2007-3630 JP 2006-96241 A JP 2006-173817 A

  The auditory information providing apparatus described in Patent Documents 1 to 6 described above includes a hole and a sound guide member through which sound generated by a sounding body passes. These holes and sound guide members are opened toward the occupant in order to convey the occupant with sufficient sound pressure. For this reason, there is a possibility that liquids such as dust, dust, and water may enter the auditory information providing apparatus from the outside through these holes and the sound guide member and adhere to the printed wiring board, etc., and the dust resistance and waterproofness are low. There was a problem.

  In particular, when such an auditory information providing device is used in agricultural vehicles such as tractors, the driver's seat is often not sealed (and even without a roof) unlike a passenger car, and the occupant is visible from above. Since the holes and the sound guide members are arranged along the vertical direction (close direction), liquids such as dust, dust and water are more likely to enter the auditory information providing apparatus. there were.

  The present invention aims to solve such problems. That is, an object of the present invention is to provide an auditory information providing apparatus that is excellent in dust resistance and waterproofness and that can improve the sound pressure of sound produced by a sounding body.

  In order to solve the problems and achieve the object, the invention described in claim 1 is arranged between a case containing a sounding body, a front glass covering the case, and the case and the front glass. In the auditory information providing device provided with a turnback, the sound information providing device is provided in the case, accommodates the sounding body therein, and has a first opening opened in front of the turnout side of the case, and A sound generator housing portion that is sealed except for the one opening portion, the second opening portion that is provided in the facing and has a second opening portion that is continuous with the first opening portion and opens toward the front glass. Except for a sound-conducting part that is sealed, and a gap that is provided between the front glass and the second opening and opens toward the back side away from the facing of the case. A hearing information providing device .

  According to a second aspect of the present invention, in the auditory information providing apparatus according to the first aspect, the case includes a case main body disposed on the facing side and a back cover attached to the case main body. The sound generator housing portion includes a cylindrical tube portion projecting from the inner surface of the back cover toward the case body, and the first opening portion provided in the case body and communicating with the tube portion. In addition, a first reflection surface is provided on the inner surface of the cylindrical portion so as to be inclined with respect to the central axis of the cylindrical portion, and reflects the sound emitted by the sounding body toward the first opening. This is an auditory information providing apparatus characterized by this.

  According to a third aspect of the present invention, in the auditory information providing apparatus according to the first or second aspect, the outer edge of the second opening portion on the inner side of the sound guide portion and on the side away from the case. The auditory information providing apparatus is characterized in that a second reflection surface for reflecting the sound guided into the sound guide section toward the second opening is provided.

  According to the first aspect of the present invention, the sound emitted by the sound generator accommodated in the sound generator accommodating portion of the case enters the reversing sound guide portion through the first opening portion, and the second opening portion. After passing through the gap between the turning glass and the front glass, it proceeds toward the back side of the case through this gap and is transmitted to the outside of the auditory information providing apparatus. Since this gap is opened on the back side of the case, it is possible to prevent liquids such as dust, dust and water from entering the auditory information providing apparatus from the gap.

  In particular, when the auditory information providing apparatus is mounted so that the occupant can view from above, the gap opens downward, so that foreign matter can be prevented more reliably. In addition, compared to the case where the case has a hole opened toward the back side of the case, the sound is transmitted to the outside of the auditory information providing device through a path closer to the occupant. The sound pressure can be improved, and a sound that is more easily heard by the occupant can be provided.

  According to the second aspect of the present invention, the sound in the cylindrical portion is reflected by the first reflecting surface and easily travels toward the first opening. For this reason, the sound pressure of the sound transmitted outside the auditory information providing apparatus can be further improved.

  According to the third aspect of the present invention, the sound in the sound guide portion is reflected by the second reflecting surface and easily travels toward the second opening. For this reason, the sound pressure of the sound transmitted outside the auditory information providing apparatus can be further improved.

It is a front view which shows a part of combination meter for vehicles concerning one Embodiment of this invention. It is sectional drawing along the II-II line | wire in FIG. It is sectional drawing which shows the modification of the combination meter for vehicles shown by FIG.

  Hereinafter, an auditory information providing apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. An auditory information providing apparatus according to an embodiment of the present invention is a vehicle combination meter 1 shown in FIG. The vehicle combination meter 1 is a device that is mounted on a moving body such as an automobile and notifies a passenger of the moving body of the state of the moving body.

  The vehicle combination meter 1 further includes a buzzer 20 as a sounding body, and notifies the occupant of the situation by sound (auditory information) in addition to visual information. As shown in FIG. 2, the vehicle combination meter 1 includes a case 10, a buzzer 20, a sound generator housing unit 15, a display instrument 3, a turnback 4, a sound guide unit 45, a front glass 5, and the like. ing.

  The case 10 is made of a synthetic resin and includes a case main body 11 disposed on the facing 4 side and a back cover 14 attached to the case main body 11 as shown in FIG. The case body 11 includes an upper wall 11a having a rectangular planar shape, and an outer peripheral wall 11b erected from the outer edge of the upper wall 11a toward the back cover 14, and is formed in a box shape opened to the back cover 14 side. ing. In addition, the case body 11 is provided with a concave portion provided from the upper wall 11 a toward the back cover 14 to which a later-described dial plate 33 is attached, or from the upper wall 11 a toward the back cover 14. A wiring board attaching portion 13 is provided which is formed by a plurality of partition walls and to which a printed wiring board 22 described later is attached.

  The back cover 14 includes a bottom wall 14a having a planar shape substantially equal to the upper wall 11a of the case main body 11, and an outer peripheral wall 14b erected from the outer edge of the bottom wall 14a toward the case main body 11, and on the case main body 11 side. It is formed in an open box shape. The back cover 14 is attached to the case main body 11 so that the front end surface of the outer peripheral wall 14b overlaps the front end surface of the outer peripheral wall 11b of the case main body 11 described above, and a lock portion (not shown) provided on the outer peripheral walls 14b and 11b. ) Engage with each other, and the case 10 is assembled. The front end surfaces of these outer peripheral walls 14b and 11b are in close contact with each other through a packing (not shown) made of an elastic material such as rubber disposed between them, and dust, Prevent foreign matter such as dust and water.

  In the case 10 described above, a buzzer 20, a movement 31 described later, an LED 21 as a light source for the pointer 32 and the dial 33, and the like are accommodated. The buzzer 20, the movement 31 and the LED 21 are mounted on the printed wiring board 22. The printed wiring board 22 is attached to the wiring board attaching portion 13 of the case main body 11 and attached to the inner surface of the case main body 11 on the back cover 14 side. The printed wiring board 22 has an LED 21 mounted on the surface on the case body 11 side, and an electronic component (not shown) such as a buzzer 20, a movement 31 and a microcomputer for controlling these operations on the surface on the back cover 14 side. Has been implemented.

  The buzzer 20 is a known piezoelectric buzzer, for example. The buzzer 20 is connected to vehicle speed measuring means (not shown) that measures the vehicle speed mounted on the vehicle, and emits a sound when the measured amount measured by the vehicle speed measuring means exceeds a predetermined value, Inform the crew of the situation. Note that the buzzer 20 may be connected to measuring means corresponding to other meters and gauges to be described later of the display instrument 3, or other detecting means other than these measuring means (for example, wearing or not wearing a seat belt) Or a detecting means for detecting the

  As shown in FIG. 2, the sound generator housing portion 15 is provided in the case 10 described above and houses the buzzer 20 therein. The sounding body housing portion 15 includes a first tube portion 16 as a tube portion and a first opening portion 17.

  The first cylinder portion 16 is provided on the back cover 14 and is formed in a cylindrical shape protruding toward the case body 11 from the inner surface of the back cover 14, that is, the inner surface of the bottom wall 14 a on the case body 11 side. The inner diameter of the first tube portion 16 is formed larger than the outer diameter of the buzzer 20. The first tube portion 16 is provided at a position overlapping with the buzzer 20 attached to the case body 11 via the printed wiring board 22 in a plan view of the case 10 as indicated by the diagonally downward slanting line in FIG. Yes. The 1st cylinder part 16 accommodates the buzzer 20 inside.

  A first reflecting surface 16 a is provided on the inner surface of the first tube portion 16. The first reflecting surface 16 a is formed over the entire circumference of the first cylindrical portion 16 at a connection portion with the bottom wall 14 a of the first cylindrical portion 16. The first reflecting surface 16a is formed so as to be inclined with respect to the central axis P in a direction gradually approaching the central axis P of the first cylindrical portion 16 as the bottom wall 14a is approached. As will be described later, the first reflecting surface 16 a reflects the sound emitted by the buzzer 20 accommodated in the first tube portion 16 toward the first opening 17.

  The first opening 17 is provided in the case main body 11 and opens in the front surface 10 a on the side 4 of the case 10. The first opening 17 communicates the inside of the case 10 and the outside of the case 10 with each other. The 1st opening part 17 is provided with the through-hole 17a and the 2nd cylinder part 17b. The through hole 17a passes through the upper wall 11a of the case body 11. The through hole 17 a is provided closer to the outer peripheral wall 11 b of the case body 11 than the dial 33 attached to the front surface 10 a of the case 10, and is provided at a position not covered by the dial 33.

  The 2nd cylinder part 17b is formed in the cylinder shape standingly arranged toward the back cover 14 from the outer edge of the through-hole 17a. The inner and outer diameters of the second cylinder part 17 b are formed smaller than the inner and outer diameters of the first cylinder part 16. The second cylindrical portion 17 b is provided on the outer peripheral wall 11 b side of the case main body 11 with respect to the printed wiring board 22 attached to the case main body 11, and the opening is provided at a position where the printed wiring board 22 is not covered. Further, the second cylindrical portion 17b is provided at a position where the entirety of the second cylindrical portion 17b overlaps with the first cylindrical portion 16 in a plan view of the case 10, as indicated by a diagonal line rising to the right in FIG. A cutout portion on which the outer edge of the printed wiring board 22 is placed is provided at the tip of the second cylinder portion 17b on the center side of the case body 11.

  In the sound generator housing portion 15 described above, when the back cover 14 is attached to the case main body 11 and the case 10 is assembled, the entire circumference of the tip surface of the first tube portion 16 is the tip surface of the second tube portion 17b or the printed wiring board. The first cylindrical portion 16 accommodates the buzzer 20 inside by being pressed and adhered to any one of the surfaces of 22. At this time, in the sound generator housing portion 15, the first tube portion 16 and the first opening portion 17 communicate with each other, and the portions other than the first opening portion 17 are sealed. In addition, in order to make the front end surface of the 1st cylinder part 16, the front end surface of the 2nd cylinder part 17b, and the surface of the printed wiring board 22 contact more reliably, you may interpose packing etc. between these.

  The display meter 3 includes a speedometer 30 that displays the speed of the vehicle, a tachometer that displays the engine speed (not shown), a fuel gauge that displays the remaining amount of fuel, and a temperature gauge that displays the temperature of the engine coolant. I have. Since the speedometer 30, the tachometer, the fuel gauge, and the temperature gauge have substantially the same structure, the speedometer 30 will be described as a representative.

  The speedometer 30 includes a movement 31, a pointer 32, a dial plate 33, a light guide member 34, and the like. The movement 31 is connected to the vehicle speed measuring means described above. The movement 31 includes an output shaft that rotates in accordance with a measurement amount measured by the vehicle speed measurement means.

  The pointer 32 is made of a translucent synthetic resin. The pointer 32 includes a proximal end portion 32a and an instruction portion 32b. The base end portion 32a is formed in a disc shape, and an insertion tube into which the output shaft of the movement 31 is inserted protrudes from the center. The instruction portion 32b is connected to the base end portion 32a and is formed in a rod shape extending from the base end portion 32a toward the outside of the base end portion 32a.

  The above-described pointer 32 is attached in a state where the insertion tube of the base end portion 32 a is attached to the output shaft of the movement 31 and the base end portion 32 a is located at the center of the dial 33. The pointer 32 rotates integrally with the output shaft of the movement 31 around the base end portion 32a. The pointer 32 is rotated by the movement 31 in accordance with the measurement amount measured by the measurement means, and displays the measurement amount in cooperation with a scale 33a or the like (described later) attached to the dial 33.

  The dial plate 33 is made of a translucent synthetic resin and is formed in a disk shape. In the center of the dial 33, a hole for positioning the output shaft and the like of the movement 31 is provided. Further, a light shielding layer is formed on the surface of the dial plate 4 on the side of the turn 4 side, and a scale 33a (FIG. 1) for displaying the vehicle speed is formed on the surface by removing a part of the light shielding layer. Yes. The dial 33 is attached to the dial attachment portion 12 of the case body 11 and attached to the front surface 10 a of the case 10. The light guide member 34 is disposed on the surface of the dial 33 on the case body 11 side. The light guide member 34 guides the light from the LED 21 to the dial plate 33 and the pointer 32 to shine the scale 33 a and the pointer 32 on the dial plate 33.

  The speedometer 30 having the above-described configuration rotates the output shaft and the pointer 32 in accordance with the measurement amount measured by the vehicle speed measurement unit. The pointer 32 indicates the scale 33a on the dial 33, thereby displaying the status of the moving body to the occupant. Similarly, the tachometer, fuel gauge, and temperature gauge rotate the output shaft and the pointer according to the measurement amount measured by the corresponding measuring means, respectively, and the pointer indicates the scale on the dial so that the occupant can On the other hand, the status of the moving object is displayed.

  The facing 4 is made of a light shielding synthetic resin. As shown in FIGS. 1 and 2, the facing 4 includes a facing main body 40, an inner wall 41, an outer peripheral wall 42, and a flange portion 43. The facing main body 40 is formed in a plate shape whose planar shape is slightly smaller than the upper wall 11 a of the case main body 11. The facing main body 40 is provided with an exposure window 40 a that is formed in a round hole shape penetrating the facing main body 40 and exposes the dial 33 attached to the case main body 11.

  The inner wall 41 includes a cylindrical portion 41a and a connecting portion 41b. The cylindrical portion 41a is formed in a cylindrical shape standing from the entire outer edge of each exposure window 40a toward the case 10. The cylindrical portion 41 a is formed in such a length that the tip thereof is in close contact with the dial 33 when the turn 4 is attached to the case 10. The connecting portion 41b is formed in a flange shape, and is provided to extend outward from the outer surface of the center half in the center axis direction of each cylindrical portion 41a and the left half in FIG. 2 in the circumferential direction.

  The outer peripheral wall 42 is formed in a cylindrical shape extending from the end portion (left side in FIG. 2) of the connecting portion 41b away from the cylindrical portion 41a or the outer edge (right side in FIG. 2) of the facing main body 40 toward the case 10. ing. The flange portion 43 is provided so as to extend outward from the end portion of the outer peripheral wall 42, and is provided over the entire circumference of the outer peripheral wall 42.

  In the above-described facing 4, the flange portion 43 is pressed against and closely contacts the outer edge of the upper wall 11a of the case main body 11, and the lock portions (not shown) provided on the flange portion 43 and the case main body 11 are engaged with each other. And attached to the case 10. When the dial 4 is attached to the case 10, the distal end surface of the tubular portion 41 a is pressed against the outer edge of the dial 33 to be in close contact with the dial 33, and the dial 33 is sandwiched between the case 10. The lookback 4 exposes the display portion of the display instrument 3 such as the dial 33 through the exposure window 40a to the occupant and shields other portions than the display portion from the occupant.

  As shown in FIG. 2, the sound guide portion 45 is provided in the look-back 4 described above. The sound guide portion 45 is formed by the inner wall 41 and the outer peripheral wall 42 of the turn-up 4, and the cross-sectional shape is formed in a U shape or a V shape. The sound guide portion 45 causes the sound that has traveled out of the sound generator housing portion 15 through the first opening portion 17 to enter a ring-shaped space (inside) surrounded by the inner wall 41 and the outer peripheral wall 42.

  Further, when the turn 4 is attached to the case 10, as described above, the front end surface of the tubular portion 41a of the inner wall 41 is in close contact with the outer edge of the dial 33 disposed on the center side of the case body 11 with respect to the through hole 17a. The flange portion 43 is in close contact with the outer edge of the upper wall 11a that is farther from the center of the case body 11 than the through-hole 17a. Thus, the sound guide portion 45 is arranged so as to cover the first opening portion 17, and continues to the first opening portion 17. Further, the sound guide portion 45 is closed by the upper wall 11 a of the case body 11 except for the portion connected to the first opening portion 17. In addition, in order to make the front-end surface of the cylindrical part 41a and the surface of the dial plate 33, and the flange part 43 and the upper wall 11a adhere more reliably, you may interpose packing etc. between these, respectively.

  Further, the sound guide portion 45 has a second opening 46. The second opening 46 is formed in a slit shape extending in the vertical direction in FIG. 2, is formed across the outer peripheral wall 42 and the flange portion 43, and penetrates the outer peripheral wall 42 and the flange portion 43. . The second opening 46 is provided in the vicinity of the first opening 17 (that is, in the vicinity of the buzzer 20) in the circumferential direction of the outer peripheral wall 42 and the flange 43, and opens toward the front glass 5. The sound guide 45 is sealed except for the second opening 46.

  Further, a second reflecting surface 46a is provided on the outer edge of the second opening 46 on the inner side of the sound guide portion 45 and away from the case 10, that is, on the inner surface of the connecting portion 41b facing the case 10. It has been. The second reflecting surface 46a is formed to be inclined (curved) gradually toward the case 10 as it approaches the tubular portion 41a. The second reflection surface 46 a reflects the sound guided into the sound guide portion 45 toward the second opening 46 as will be described later.

  The front glass 5 is made of a translucent synthetic resin. As shown only in FIG. 2, the front glass 5 includes a front glass main body 50, an outer peripheral wall 51, a first flange portion 52, and a second flange portion 53. The front glass body 50 is formed in a plate shape whose outer shape is formed in substantially the same shape as the facing main body 40 and slightly curved convexly toward the case 10. The outer peripheral wall 51 is formed in a cylindrical shape extending from the outer edge of the front glass body 50 toward the case 10.

  The first flange portion 52 is provided so as to extend outward from the end portion of the outer peripheral wall 51 away from the front glass body 50, and is provided over the entire circumference of the outer peripheral wall 51. The second flange portion 53 is provided to extend from the end portion of the first flange portion 52 away from the outer peripheral wall 51 toward the case 10, and is provided over the entire circumference of the first flange portion 52.

  The front glass 5 described above is stacked on the case 10 to which the turn 4 is attached so that the front glass body 50 overlaps the turn main body 40, and the turn 4 is positioned between the case 10 and the case 10. Then, the front glass 5 is attached to the case 10 so that lock portions (not shown) provided on the second flange portion 53 and the case main body 11 are engaged with each other to cover the case 10. The front glass 5 prevents liquids such as dust, dirt and water from entering the vehicle combination meter 1 from the exposed window 40a of the turn 4.

  In addition, the front glass 5 attached to the case 10 in this way has the outer peripheral wall 42 whose outer peripheral wall 51 is turned 4, the first flange portion 52 is the turned flange portion 43, and the second flange portion 53 is the case main body. 11 and an outer peripheral surface, respectively, and a gap 54 is formed. The gap 54 is open toward the back surface 10b side away from the facing 4 of the case 10. Moreover, the clearance gap 54 is formed over the perimeter of the surface glass 5, and of course, is also formed between the surface glass 5 and the 2nd opening part 46 (the part turning-off 4 provided).

  Hereinafter, in the vehicle combination meter 1 having the above-described configuration, a path (an example is indicated by a dashed-dotted arrow A in FIG. 2) when sound generated by the buzzer 20 is transmitted to the outside of the vehicle combination meter 1 will be described.

  The buzzer 20 is mounted on the surface of the back cover 14 side on the printed wiring board 22 attached to the case body 11 so as to protrude toward the back cover 14, and the first tube portion 16 of the sound generator housing portion 15. Is positioned within. For this reason, the buzzer 20 emits a sound within the first tube portion 16.

  Then, this sound is reflected by the inner surface of the first tube portion 16 and the inner surface of the bottom wall 14 a and proceeds toward the first opening portion 17 which is the only opening of the sound generator housing portion 15. Furthermore, at this time, the sound is also reflected by the first reflecting surface 16 a provided on the inner surface of the first tube portion 16, and can easily travel toward the first opening portion 17.

  Next, the sound passes through the first opening 17 and travels outside the sound generator housing portion 15, that is, outside the case 10, and enters the sound guide portion 45 of the turn 4. Then, the sound is reflected by the outer surface of the cylindrical portion 41 a of the turn-up 4 constituting the sound guide portion 45 and proceeds toward the second opening 46. Furthermore, at this time, the sound is also reflected by the second reflecting surface 46 a provided on the inner surface of the connecting portion 41 b of the counterclockwise 4, so that the sound can easily travel toward the second opening 46.

  Thereafter, the sound passes through the second opening 46 and advances to the outside of the sound guide portion 45, that is, outside the face 4, and enters the gap 54 between the front glass 5 and the face 4. The sound is reflected on the outer peripheral wall 51 of the front glass 5, the inner surfaces of the first flange portion 52 and the second flange portion 53, the flange portion 43 of the facing 4, the outer peripheral surface of the case body 11, and the like, while being reflected by the gap 54. It passes toward the back surface 10b side of the case 10 through. Thus, after the sound has traveled out of the vehicle combination meter 1, the sound is transmitted to the passenger through the vehicle combination meter 1 and the instrument panel to which the vehicle combination meter 1 is attached.

  According to the present embodiment, the sound emitted by the buzzer 20 accommodated in the sound generator accommodating portion 15 of the case 10 enters the sound guiding portion 45 of the turn 4 through the first opening portion 17, and the second After entering the gap 54 between the turn 4 and the front glass 5 through the opening 46, it proceeds toward the back surface 10 b side of the case 10 through this gap 54 and is transmitted to the outside of the vehicle combination meter 1. Since the gap 54 opens to the back surface 10b side of the case 10, it is possible to prevent foreign matter such as liquid such as dust, dust and water from entering the vehicle combination meter 1 from the gap 54.

  In particular, the vehicle combination meter 1 is suitably used for agricultural vehicles such as tractors. In an agricultural vehicle, unlike a passenger car, the driver's seat is often not sealed, and the vehicle combination meter 1 is often attached so that an occupant can see from above. For this reason, the clearance gap 54 opens below, and it can prevent more reliably that a foreign material enters the combination meter 1 for vehicles.

  Further, as compared with the case where a hole opened toward the back surface 10b side of the case 10 is provided in the case 10, the sound is transmitted to the outside of the vehicle combination meter 1 through a path closer to the occupant, so the vehicle combination meter 1 The sound pressure of the sound transmitted to the outside can be improved, and a sound that is more easily heard by the occupant can be provided.

  Further, the sound generator housing portion 15 of the case 10 is provided with a first reflecting surface 16a. For this reason, the sound in the cylindrical portion is reflected by the first reflecting surface 16 a and easily travels toward the first opening portion 17. Therefore, the sound pressure of the sound transmitted outside the vehicle combination meter 1 can be further improved.

  Further, a second reflecting surface 46 a is provided in the vicinity of the second opening 46 of the facing 4. For this reason, the sound in the sound guide portion 45 is reflected by the second reflecting surface 46 a and easily travels toward the second opening portion 46. Therefore, the sound pressure of the sound transmitted outside the vehicle combination meter 1 can be further improved.

  In the embodiment described above, the vehicle combination meter 1 has been described as an example of the auditory information providing apparatus. However, for example, an apparatus including a sounding body connected to a detection unit that detects whether the seat belt is worn or not is used. Such a device other than the meter without the display meter 3 may be used. In the embodiment described above, the buzzer 20 has been described as an example of a sounding body. However, the sounding body may be anything that emits sound (sound), and may be a speaker, a blinker relay, or the like.

  Further, in the above-described embodiment, the case 10 is provided with the first reflecting surface 16a and the look-back 4 is provided with the second reflecting surface 46a. However, even if only one of these reflecting surfaces is provided. Alternatively, both may not be provided as shown in FIG.

  The above-described embodiments are merely representative examples of the present invention, and the present invention is not limited to the above-described embodiments. That is, various modifications can be made without departing from the scope of the present invention.

1 Vehicle combination meter (auditory information provision device)
4 Look-back 5 Front glass 10 Case 10a Front 10b Back 11 Case body 14 Back cover 15 Sounding body accommodation part 16 1st cylinder part (cylinder part)
16a First reflective surface 17 First opening 20 Buzzer (sounding body)
45 Sound Conducting Section 46 Second Opening 47 Second Reflecting Surface 54 Gap P Center Axis

Claims (3)

In an auditory information providing apparatus comprising a case containing a sounding body, a front glass covering the case, and a look placed between the case and the front glass,
A sounding body housing portion provided in the case, housing the sounding body therein, having a first opening opened in front of the facing side of the case, and being sealed except for the first opening; ,
A sound guide portion that is provided in turn and has a second opening that opens to the front glass and that is continuous with the first opening, and is sealed except for the second opening;
An auditory information providing apparatus comprising: a gap provided between the front glass and the second opening, and opening toward a back side away from the facing of the case. The case includes a case main body arranged on the facing side, and a back cover attached to the case main body,
The sound generator housing portion includes a cylindrical tube portion that protrudes from the inner surface of the back cover toward the case body, and the first opening that is provided in the case body and communicates with the tube portion. ,
A first reflection surface is provided on the inner surface of the cylindrical portion so as to be inclined with respect to the central axis of the cylindrical portion and to reflect the sound produced by the sounding body toward the first opening. The auditory information providing apparatus according to claim 1, wherein   A second reflecting surface for reflecting the sound guided into the sound guide portion toward the second opening portion is provided on the outer edge portion of the second opening portion on the inner side of the sound guide portion and away from the case. The auditory information provision apparatus according to claim 1, wherein the hearing information provision apparatus is provided.

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