JP5907790B2 - Electronic device speaker mounting structure - Google Patents

Description

  The present invention relates to a speaker mounting structure for an electronic device.

  Electronic devices such as mobile phones, electronic dictionaries, and notebook computers have built-in small and thin speakers. In this case, in order to make it easy for the user to hear the sound from the speaker, an opening for sound emission is formed in a part of the casing of the electronic device, and the speaker is disposed in the vicinity of the inside of the opening.

In these electronic devices, when the anti-phase sound radiated from the back of the speaker interferes with the sound radiated from the sound emitting surface in front of the speaker, the volume of the sound radiated outside the electronic device is reduced. End up. For this reason, a speaker mounting structure for an electronic device that suppresses a decrease in volume due to an antiphase sound has been proposed (see, for example, Patent Documents 1 and 2).
Moreover, what uses the resin molded product shape | molded using the metal mold | die is known as a housing | casing of an electronic device.

JP 2000-112568 A JP 2008-28595 A

However, the speaker fixing method for an electronic device described in Patent Document 1 and the buzzer device described in Patent Document 2 describe nothing about the speaker mounting structure when the casing of the electronic device is a resin molded product. Absent.
That is, when the housing of the electronic device is a resin molded product, it is possible to form a through-hole in the direction perpendicular to the mold removal direction in the housing, but the mold structure is complicated and difficult to manufacture, Cost increases. On the other hand, the speaker has a generally flat shape, and the hole corresponding to the through hole of the housing is provided so as to face the front direction of the speaker. Therefore, when the through hole of the housing and the hole of the speaker are communicated and the speaker is fixed to the housing with, for example, bolts and nuts, it is difficult to fix the speaker in a direction perpendicular to the direction of mold release of the housing. In addition, there was a problem of high costs. In addition, when the speaker is fixed by being pushed into a V-shaped groove or the like formed in the housing, a gap is formed between the V-shaped groove and the speaker, and noise is generated by the vibration of the speaker during operation. There was a problem.

  The present invention has been made in view of such a problem, and even if the casing of an electronic device is a resin molded product, the speaker can be securely fixed regardless of the direction of removing the mold of the casing. The main object of the present invention is to provide a speaker mounting structure for an electronic device that can be used.

Thus, according to the present invention, the first wall of the housing of the electronic device product having the first wall along the direction orthogonal to the mold drawing direction and the second wall along the mold drawing direction in resin molding. A fixing portion provided on an inner surface, a speaker provided in the housing, and a speaker holder for holding the speaker and fixing the speaker to the fixing portion so that a front surface of the speaker faces the second wall ;
There is provided a speaker mounting structure for an electronic device in which the speaker holder has a cylindrical member provided on the periphery of the speaker at least on the back side .
Here, in the present invention, the “die cutting direction” and the “direction perpendicular to the die cutting direction” include directions deviated from the direction by a predetermined angle.
Moreover, according to another viewpoint of this invention, the self-propelled cleaner provided with the said speaker attachment structure is provided.

According to the speaker mounting structure for an electronic device of the present invention, even if the housing of the electronic device is a resin-molded product, the speaker can be securely fixed regardless of the mold removal direction of the housing.
Moreover, since the anti-phase sound radiated from the back surface of the speaker is difficult to turn to the front side by the cylindrical member, it is possible to suppress a decrease in volume due to the sound radiated from the front surface of the speaker interfering with the anti-phase sound. .

It is a perspective view of the self-propelled cleaner of Embodiment 1 provided with the speaker mounting structure of the present invention. It is a partial plane sectional view which shows the speaker attachment structure of Embodiment 1 provided in the self-propelled cleaner shown in FIG. It is AA arrow sectional drawing of the self-propelled cleaner shown by FIG. It is a schematic bottom view of the self-propelled cleaner shown in FIG. FIG. 4 is a view corresponding to FIG. 3, illustrating a state in which the lid of the housing is opened and the dust collecting unit is taken out. It is a block diagram which shows the electrical structure of the self-propelled cleaner shown by FIG. It is the fragmentary sectional view which looked at the speaker attachment structure in the self-propelled cleaner shown in FIG. 1 from the left side. 3 is a plan view showing a speaker unit in the speaker mounting structure of Embodiment 1. FIG. It is a front view of the speaker unit of FIG. It is a bottom view of the speaker unit of FIG. It is a right view of the speaker unit of FIG. It is a rear view of the speaker unit of FIG. It is a left view of the speaker unit of FIG. It is BB arrow sectional drawing of the speaker unit of FIG.9 (B). It is CC sectional view taken on the line of the speaker unit of FIG.9 (C). It is a disassembled perspective view of the speaker unit of FIG. It is the fragmentary sectional view which looked at Embodiment 2 of the speaker mounting structure of the present invention from the left side. It is the fragmentary sectional view which looked at Embodiment 3 of the speaker mounting structure of the present invention from the left side. It is the fragmentary sectional view which looked at Embodiment 4 of the speaker attachment structure of the present invention from the left side. It is a perspective view which shows the speaker attachment part of the self-propelled cleaner as a comparison with respect to the embodiment of the present invention. It is sectional drawing which looked at the speaker attachment part of FIG. 15 from the side.

According to another aspect of the present invention, there is provided a speaker mounting structure for an electronic device having a first wall along a direction orthogonal to a mold drawing direction and a second wall along a mold drawing direction in resin molding. A fixing portion provided on an inner surface of one wall, a speaker provided in the housing, and a speaker holder for holding the speaker and fixing the speaker to the fixing portion so that a front surface of the speaker faces the second wall. And the speaker holder has a cylindrical member provided on the periphery of the speaker on at least the back side . Here, as an electronic device, if it is an electronic device provided with the housing | casing which has the 1st wall along the direction orthogonal to the metal mold extraction direction in resin molding, and the 2nd wall along the metal mold extraction direction, especially Typically, self-propelled electronic devices such as a self-propelled cleaner and a self-propelled ion generator can be cited.

  Hereinafter, embodiments of a speaker mounting structure for an electronic apparatus according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments.

(Embodiment 1)
Embodiment 1 demonstrates the speaker attachment structure of a self-propelled cleaner. First, the overall configuration of the self-propelled cleaner 1 according to the present invention will be described, and then the speaker mounting structure according to the present invention will be described in detail.
FIG. 1 is a perspective view of a self-propelled cleaner of Embodiment 1 having the speaker mounting structure of the present invention, and FIG. 2 is a speaker attachment of Embodiment 1 provided in the self-propelled cleaner shown in FIG. It is a partial plane sectional view showing a structure. 3 is a cross-sectional view taken along line AA of the self-propelled cleaner shown in FIG. 1, FIG. 4 is a schematic bottom view of the self-propelled cleaner shown in FIG. 1, and FIG. FIG. 6 is a view corresponding to FIG. 3 showing a state in which the body lid is opened and the dust collecting part is taken out, and FIG. 6 is a block diagram showing an electrical configuration of the self-propelled cleaner shown in FIG. Hereinafter, the “self-propelled cleaner” may be referred to as a “cleaning robot”.

This cleaning robot 1 cleans the floor surface by sucking air containing dust on the floor surface and exhausting the air from which dust has been removed while running on the floor surface of the place where it is installed.
The cleaning robot 1 includes a disk-shaped casing 2, and a rotating brush 9, a pair of side brushes 10, a dust collection box 30, an electric blower 22, a pair of drive wheels 29, and a rear part are provided inside or outside the casing 2. Components such as a control unit including a wheel 26, a front wheel 27, and various sensors are provided.
In this cleaning robot 1, the portion where the front wheel 27 is disposed is the front portion, the portion where the rear wheel 26 is disposed is the rear portion, and the portion where the dust collection box 30 is disposed is the intermediate portion.

  The housing 2 opens and closes when the dust collection box 30 is taken in and out of the housing 2 and the bottom plate 2a having a suction port 6 formed at a position near the boundary with the intermediate portion in the front portion. A top plate 2b having a lid portion 3 at an intermediate portion, and a bottom plate 2a and a side plate 2c having an annular shape in plan view provided along the outer periphery of the top plate 2b are provided.

  The bottom plate 2a is formed with a plurality of hole portions for projecting the lower portions of the front wheel 27, the pair of drive wheels 29 and the rear wheel 26 from the inside of the housing 2 to the outside, near the boundary between the front portion and the middle portion of the top plate 2b. An exhaust port 7 is formed.

The side plate 2c can be divided into upper and lower parts as a whole, and is divided into a front half part and a rear half part. The front half of the side plate 2c is movable in the front-rear direction with respect to the bottom plate 2a and the top plate 2b, and functions as a bumper. Therefore, in the housing 2, the lower half 2c ₁ of the side plate 2c is connected along the outer periphery of the circular bottom plate 2a, and the bottom plate 2a and the lower half 2c ₁ of the side plate 2c are produced by integral molding of resin. ing. At this time, the bottom plate 2a is formed along the direction perpendicular to the die cutting direction (Z direction: see FIG. 7) in resin molding, and the lower half 2c of the side plate 2c curved along the die cutting direction (Z direction). ₁ is formed.

Then, a plurality of openings 2cw are formed in a stripe pattern for the sound radiation and some late bottom 2c ₁ of the side plate 2c, a speaker mounting structure E ₁ is provided in the vicinity of the opening 2cw on the bottom plate 2a . Further, when viewed from the side, the cross-sectional shape of the side plate 2c is curved, and the angle θ between the bottom plate 2a and the lower half 2c ₁ having the opening 2cw of the side plate 2c is greater than 90 ° (see FIG. 7). . A reinforcing rib 2cr is provided between two adjacent openings 2cw.

Further, as shown in FIG. 3, the housing 2 has a front storage chamber R1 for storing a motor unit 20, an electric blower 22, an ion generator 25 (see FIG. 5) and the like in the front portion, and an intermediate portion. The rear storage chamber has an intermediate storage chamber R2 for storing the dust collection box 30 in the part, and the control board 15 of the control unit, the battery 14, the speaker mounting structure E ₁ including the speaker S, the charging terminal 4 and the like in the rear part. It has R3, and has a suction passage 11 and an exhaust passage 12 in the vicinity of the boundary between the front portion and the intermediate portion. The suction path 11 communicates the suction port 6 and the intermediate storage chamber R2, and the exhaust path 12 communicates the intermediate storage chamber R2 and the front storage chamber R1. Each of the storage chambers R1, R2, R3, the suction path 11 and the exhaust path 12 is partitioned by a partition wall 39 provided inside the housing 2 and constituting these spaces.

The pair of driving wheels 29 are fixed to a pair of rotating shafts 29a that intersect at right angles with a center line C (see FIG. 3) passing through the center of the casing 2 that is circular in plan view, and the pair of driving wheels 29 are in the same direction. When it rotates, the housing 2 advances and retreats, and when each drive wheel 29 rotates in the opposite direction, the housing 2 rotates around the center line C.
The pair of rotating shafts 29a are coupled so that rotational force can be obtained individually from a pair of motors (not shown), and each motor is fixed to the bottom plate 2a of the housing directly or via a suspension mechanism.

The front wheel 27 is made of a roller, and contacts the step appearing on the path, and the bottom plate 2a of the housing 2 is slightly lifted from the floor F where the driving wheel 29 contacts the ground so that the housing 2 can easily get over the step. A part is rotatably provided.
The rear wheel 26 is a free wheel, and is rotatably provided on a part of the bottom plate 2a of the housing 2 so as to be in contact with the floor surface F to which the driving wheel 29 is grounded.
In this way, the pair of driving wheels 29 is arranged in the middle in the front-rear direction with respect to the housing 2, the front wheels 27 are lifted from the floor surface F, and the weight of the cleaning robot 1 can be supported by the pair of driving wheels 29 and the rear wheels 26. Thus, the weight is distributed to the housing 2 in the front-rear direction. Thereby, the dust in front of the course can be guided to the suction port 6 without being blocked by the front wheel 27.

The suction port 6 is an open surface of the recess 8 formed on the bottom surface 2a _{1 of the} housing 2 (the lower surface of the bottom plate 2a) so as to face the floor surface F. A rotating brush 9 that rotates about a horizontal axis parallel to the bottom surface 2 a _{1 of the} housing 2 is provided in the concave portion 8, and perpendicular to the bottom surface 2 a _{1 of the} housing 2 on the left and right sides of the concave portion 8. A side brush 10 that rotates around a vertical axis is provided. The rotating brush 9 is formed by implanting a brush spirally on the outer peripheral surface of a roller that is a rotating shaft. The side brush 10 has a plurality of brush bundles provided radially at the lower end of the rotating shaft. The rotating shaft of the rotating brush 9 and the rotating shaft of the pair of side brushes 10 are pivotally attached to a part of the bottom plate 2a of the housing 2 and include a motor unit 20 provided in the vicinity thereof, a pulley, a belt, and the like. They are independently connected via a transmission mechanism.

  As shown in FIG. 4, a floor surface detection sensor 13 for detecting the floor surface F is disposed between the bottom surface 2 a of the housing 2 and the front wheel 27, and the same in front of the side portions of the left and right drive wheels 29. A floor detection sensor 19 is disposed. When the downstairs are detected by the floor surface detection sensor 13, the detection signal is transmitted to the control unit, and the control unit controls the drive wheels 29 to stop. Further, when the floor detection sensor 13 breaks down, the floor detection sensor 19 can detect the descending stair and stop both driving wheels 29, so that the cleaning robot 1 is prevented from falling to the descending stair. . Further, when the floor surface detection sensor 19 detects the descending staircase, the detection signal may be transmitted to the control unit, and the control unit may control the drive wheel 29 to travel avoiding the descending staircase.

The control board 15 is provided with a control circuit that controls each element of the cleaning robot 1 such as the driving wheel 29, the rotating brush 9, the side brush 10, the electric blower 22, and the speaker S.
A charging terminal 4 for charging the battery 14 is provided at the rear end of the side plate 2 c of the housing 2. The cleaning robot 1 that cleans the room while traveling by itself returns to the charging stand 40 installed in the room. Thereby, the charging terminal 4 contacts the terminal part 41 provided in the charging stand 40, and the battery 14 is charged. The charging stand 40 connected to a commercial power source (outlet) is usually installed along the side wall S in the room.
The battery 14 is charged from the charging stand 40 via the charging terminal 4 and supplies power to each element such as the control board 15, the drive wheel 29, the rotating brush 9, the side brush 10, the electric blower 22, and various sensors.

The dust collection box 30 is usually stored in the intermediate storage chamber R2 above the axis of the rotation shaft of the drive wheels 29 in the housing 2, and the dust collected in the dust collection box 30 is collected. When discarding, as shown in FIG. 4, the lid 3 of the housing 2 can be opened and the dust collection box 30 can be taken in and out.
The dust collection box 30 includes a dust collection container 31 having an opening, a filter unit 33 that covers the opening of the dust collection container 31, and a cover unit 32 that covers the filter 33 and the opening of the dust collection container 31. ing. The cover part 32 and the filter part 33 are pivotally supported by the opening edge of the front side of the dust collecting container 31 so that rotation is possible.
In the state where the dust collection box 30 is stored in the intermediate storage chamber R <b> 2 of the casing 2, the inflow path 34 that communicates with the suction path 11 of the casing 2 and the casing 2 are disposed at the front portion of the side wall of the dust collection container 31. An exhaust passage 35 communicating with the exhaust passage 12 is provided.

  As shown in FIG. 6, the control unit for controlling the operation of the entire cleaning robot 1 includes a control board 15 having a control circuit composed of a CPU 15a and other electronic parts (not shown), and a storage unit for storing a travel map 18a. 18, a motor driver 22a for driving the electric blower 22, a motor driver 51a for driving the traveling motor 51 of the drive wheel 29, a louver 17 rotatably provided near the exhaust port 7 in the housing 2, and A control unit 17a for driving it, an odor sensor 52 and its control unit 52a, a humidity sensor 53 and its control unit 53a, a human sensor 54 and its control unit 54a, a contact sensor 55 and its control unit 55a, etc. Composed.

The CPU 15a is a central processing unit and transmits control signals individually to the motor drivers 22a and 51a and the control unit 17a based on the program data stored in advance in the storage unit 18, and the electric blower 22, the traveling motor 51, and the louver. 17 is driven and controlled, and a series of cleaning operation and ion emission operation are performed.
Further, the CPU 15a accepts a condition setting related to the operation of the cleaning robot 1 by the user from an operation panel (not shown) and stores it in the storage unit 18. The storage unit 18 can store a travel map 18 a around the installation location of the cleaning robot 1. The travel map 18a is information related to travel such as the travel route and travel speed of the cleaning robot 1, and is stored in advance in the storage unit 18 by the user or automatically recorded during the cleaning operation by the cleaning robot 1 itself. Can do.

  The odor sensor 52 detects odor around the outside of the housing 2. As the odor sensor 52, for example, a semiconductor type or catalytic combustion type odor sensor can be used. In order to detect the odor around the outside of the cleaning robot 1, for example, the odor sensor 52 is arranged in a state of being exposed to the outside from the side plate 2c or the top plate 2b of the housing 2. The CPU 15a is connected to the odor sensor 52 via the control unit 52a, and obtains odor information around the outside of the housing 2 based on an output signal from the odor sensor 52.

  The humidity sensor 53 detects the humidity around the outside of the housing 2. As the humidity sensor 53, for example, a capacitance type or electric resistance type humidity sensor using a polymer moisture sensitive material can be used. In order to detect the relative humidity around the outside of the cleaning robot 1, for example, the humidity sensor 53 is arranged in a state of being exposed to the outside from the side plate 2c or the top plate 2b of the housing 2. The CPU 15a is connected to the humidity sensor 53 via the control unit 53a, and obtains humidity information around the outside of the housing 2 based on an output signal from the humidity sensor 53.

  In the travel map 18a, a location where an odor above a predetermined threshold at a location where the cleaning robot 1 is installed and a location where the humidity is higher than the predetermined threshold may be stored in advance as specific locations. In this way, the CPU 15a can determine that this specific location is a location determined based on the surrounding environment of the housing 2. That is, like the odor sensor 52 and the humidity sensor 53, the travel map 18a serves as an environment detection device that detects the surrounding environment of the housing 2.

  As the human sensor 54, for example, a human sensor that detects the presence of a person using infrared rays, ultrasonic waves, visible light, or the like can be used. In order to detect the presence of a person around the outside of the cleaning robot 1, for example, the human sensor 54 is disposed in a state of being exposed to the outside from the side plate 2c or the top plate 2b of the housing 2. The CPU 15a is connected to the human sensor 54 through the control unit 54a, and obtains presence information of people around the outside of the housing 2 based on an output signal from the human sensor 54.

  The contact sensor 55 is disposed, for example, at the front portion of the side plate 2c of the housing 2 in order to detect that the cleaning robot 1 has come into contact with an obstacle during traveling. The CPU 15a is connected to the contact sensor 55 via the control unit 55a, and obtains presence information of obstacles around the outside of the housing 2 based on an output signal from the contact sensor 55.

  In the cleaning robot 1 configured as described above, the electric blower 22, the ion generator 25, the drive wheel 29, the rotating brush 9, and the side brush 10 are driven by a cleaning operation command. As a result, in a state where the rotary brush 9, the side brush 10, the drive wheel 29 and the rear wheel 26 are in contact with the floor surface F, the casing 2 self-propells within a predetermined range and removes dust on the floor surface F from the suction port 6. Inhale air containing. At this time, the dust on the floor surface F is scraped up by the rotation of the rotating brush 9 and guided to the suction port 6. Further, the dust on the side of the suction port 6 is guided to the suction port 6 by the rotation of the side brush 10.

  The air containing dust sucked into the housing 2 from the suction port 6 passes through the suction passage 11 of the housing 2 and the inflow passage 34 of the dust collection box 30 as indicated by an arrow A1 in FIG. It flows into the dust collecting container 31. The airflow that has flowed into the dust collecting container 31 passes through the filter portion 33, flows into the space 50 between the filter portion 33 and the cover portion 32, and is discharged to the exhaust passage 12 of the housing 2 through the discharge passage 35. Is done. At this time, the dust contained in the airflow in the dust collecting container 31 is captured by the filter unit 33, so that the dust accumulates in the dust collecting container 31.

The airflow flowing into the exhaust passage 12 of the housing 2 from the dust collection box 30 flows into the front storage chamber R1 as indicated by an arrow A2 in FIG. 3, and flows through a first exhaust passage and a second exhaust passage (not shown). . The airflow flowing through the first exhaust path includes ions (plasma cluster ions) released by the ion generator 25. Then, as shown by an arrow A3 in FIG. 3, an air flow containing ions is exhausted obliquely upward at the rear from the exhaust port 7 provided on the upper surface of the housing 2. Thereby, cleaning on the floor surface F is performed, and indoor sterilization and deodorization are performed by ions contained in the exhaust of the cleaning robot 1. At this time, exhaust is performed obliquely upward from the exhaust port 7 to the rear, so that the dust on the floor surface F is prevented from being rolled up, and the cleanliness of the room can be improved.
Although not shown, a part of the airflow flowing through the first exhaust path may be guided to the recess 8. In this way, since ions are included in the airflow guided from the suction port 6 to the suction path 11, the inside of the dust collection container 31 of the dust collection box 30 and the filter unit 33 can be sterilized and deodorized.

  Further, the cleaning robot 1 turns around the center line C by rotating the left and right drive wheels 29 forward in the same direction, moving forward, moving backward in the same direction, moving backward, and rotating in opposite directions. For example, when the cleaning robot 1 reaches the periphery of the cleaning area and collides with an obstacle on the course, the driving wheel 29 stops and the left and right driving wheels 29 rotate in opposite directions to change their directions. Thereby, the cleaning robot 1 can be self-propelled while avoiding obstacles in the entire installation place or the entire desired range.

In addition, the cleaning robot 1 is grounded at three points of the left and right drive wheels 29 and the rear wheel 26, and the weight is distributed in such a balance that the rear wheel 26 does not lift from the floor F even if it stops suddenly during forward movement. Yes. Therefore, it is prevented that the cleaning robot 1 suddenly stops in front of the descending stairs while moving forward, and thereby the cleaning robot 1 is tilted forward and falls to the descending stairs. The drive wheels 29 are formed by fitting rubber tires having grooves into the wheels so that they do not slip even when suddenly stopped.
Further, since the dust collection box 30 is disposed above the rotation shaft of the drive wheel 29, the weight balance of the cleaning robot 1 is maintained even if the weight increases due to dust collection.

The cleaning robot 1 can execute a unique operation based on information obtained from the odor sensor 52, the humidity sensor 53, the travel map 18a, and the human sensor 54, which are environment detection devices. For example, the cleaning robot 1 can stay for a certain period of time at a specific location determined based on the surrounding environment detected by the environment detection device, and can release an airflow including ions from the exhaust port 7. Further, the cleaning robot 1 can emit sound effects, voices, and the like from the speaker S based on a predetermined program.
The cleaning robot 1 returns to the charging stand 40 when cleaning is completed. Thereby, the charging terminal 4 contacts the terminal part 41 and the battery 14 is charged.

  Moreover, the cleaning robot 1 can drive the electric blower 22 and the ion generator 25 in a state of returning to the charging stand 40. As a result, an airflow containing ions is released obliquely upward from the exhaust port 7, and the airflow containing ions rises along the side wall S and circulates along the indoor ceiling wall and the opposite side wall. As a result, ions spread throughout the room, and the sterilization effect and deodorization effect can be improved. Thus, the cleaning robot 1 can also perform the ion emission operation alone.

  An operation unit is provided on the upper surface of the cleaning robot 1, and a cleaning operation and an ion emission operation can be executed by the operation unit. In addition, a receiving unit may be provided in the housing 2 and a transmitter that transmits a command signal to the receiving unit may be provided so that the remote controller can be operated. In addition, a command signal may be transmitted to the cleaning robot 1 from a mobile phone called a smartphone via an Internet line and a router provided in the room so that it can be remotely operated.

<Speaker mounting structure>
The speaker mounting structure E ₁ of the present invention shown in FIG. 7 includes a speaker S, a fixing portion 60 provided on the bottom wall 2 a of the housing 2, and a speaker that holds the speaker S and is fixed to the fixing portion 60. A holder 70. In the following description of the speaker mounting structure, “left and right” means the left and right direction viewed from the front of the speaker S, and “front” means the front side of the speaker S.

8A to 10B show the structure of the speaker unit U ₁ in which the speaker S is held by the speaker holder 70, and FIG. 11 shows the speaker unit U ₁ in an exploded state. The speaker S is the same as the speaker S described with reference to FIGS. 14 and 15, and through holes S _3a1 for inserting bolts are formed at the left and right ends S _3a of the flange portion S ₃ .

The speaker S has a large-diameter portion S ₁ on the front side (sound radiation surface side), a small-diameter portion S ₂ on the back side, and a flange portion S ₃ between the large-diameter portion S ₁ and the small-diameter portion S _2. The left and right ends S _3a of the flange portion S ₃ protrude greatly. The large-diameter portion S ₁ and the small-diameter portion S ₂ communicate with _each other internally, and cone paper, a center cap, a damper, etc. are provided inside the large-diameter portion S ₁ , and inside the small-diameter portion S _2. A magnet, a voice coil, and the like are provided.

  The speaker holder 70 is covered with a cover member 71 provided in the periphery of the front surface (sound radiation side) of the speaker S, a cylindrical member 72 provided in the periphery of the back surface opposite to the front surface, and the speaker S. Two sets of bolt members 73 and nut members 74 for connecting the member 71 and the cylindrical member 72 are provided.

The cover member 71 is an integrally molded product of resin, and includes a concave portion into which the outer peripheral portion of the large-diameter portion S ₁ and the flange portion S _{3 of} the speaker S are fitted, and an opening 71 a for sound emission formed in the concave portion, It has a plurality of protrusions 71b provided along the outer peripheral end of the flange portion S ₃ of the speaker S housed in the recess, and a through hole 71c communicating with the through-hole S _3a1 of the flange portion S _3.

Tubular member 72 is an integral molding of resin, and the cylindrical portion 72a of a substantially constant diameter, is provided along the front end outer peripheral surface of the cylindrical portion 72a contacts the right and left ends S _3a of the flange portion S ₃ of the speaker S The left and right presser pieces 72b, the left and right presser pieces 72b and the left and right contact pieces 72c connected to the cylindrical portion 72a, the through holes 72d formed in the left and right presser pieces 72b, and the left and right contact pieces 72c It has a long hole 72e that penetrates, and a U-shaped positioning convex part 72f formed on the lower surface of the left and right contact pieces 72 so as to surround the long hole 72e.

  More specifically, the left and right pressing pieces 72b are formed in a direction orthogonal to the axis P of the cylindrical portion 72a, and the left and right contact pieces 72c are directed to the axis P on the front side (front) of the speaker S. It is inclined in the approaching direction. Further, a stopper portion for positioning an upper end of a left boss portion 61 of the fixing portion 60 described later is provided at the rear end of the left positioning convex portion 72f shown in FIGS. 7, 9B, and 9C. 72fa is provided. Note that the rear end of the right positioning projection 72f shown in FIGS. 9A and 9B is open to prevent interference inside the housing.

  As shown in FIG. 7, the fixing portion 60 provided on the bottom plate 2 a of the housing 2 includes a pair of left and right boss portions 61 having screw insertion holes in the die removal direction (Z direction) provided at the speaker mounting position. The bolt member 62 is inserted through the screw insertion hole, and the nut member 63 is screwed into the bolt member 62. In FIG. 7, only the left boss portion 61 is shown.

When assembling the speaker mounting structure E ₁ , for example, first, the large-diameter portion S ₁ and the flange portion S ₃ of the speaker S are fitted into the concave portion of the cover member 71 via the rubber ring-shaped cushion 75. Next, the left and right ends S _3a of the flange portion S ₃ of the speaker S are pressed by the left and right pressing pieces 72b of the cylindrical member 72. Then, the bolt member 73 is passed through the through-holes 72d, S _3a1 , 71c _{communicating with} the cylindrical member 72, the speaker S and the cover member 71, and tightened with the nut member 74. As a result, the speaker unit U _{1 in} which the cover member 71 and the cylindrical member 72 are firmly connected is assembled while the speaker S is sandwiched between the cover member 71 and the cylindrical member 72 without wobbling. In the speaker unit U ₁ , the axis P of the speaker S and the axis of the cylindrical member 72 coincide with each other.

Subsequently, the contact piece 72c of the left and right speaker units U _1, is put on top of the boss portion 61 of the left and right in the casing 2, positioned against the left boss portion 61 to the left of the stopper portion 72Fa. Then, the bolt member 62 inserted from below the boss portion 61 is inserted into the screw insertion hole of the boss portion 61 and the long hole 72e of the contact piece 72c and tightened with the nut member 63. Thereby, as shown in FIG. 7, the speaker unit U ₁ is firmly fixed to the fixing portion 60 having the left and right boss portions 61.

In the speaker mounting structure E ₁ assembled in this way, the left and right contact pieces 72c of the speaker unit U ₁ are inclined in the direction approaching the axis P on the front side (front) of the speaker S. The left and right contact pieces 72c are fixed to the horizontal upper ends (parallel to the bottom plate 2a) of the left and right boss portions 61, so that the front surface of the speaker S faces downward. Thereby, compared with the case where the front surface of the speaker S is vertical, the downward front surface of the speaker S faces the lower half 2c ₁ of the side plate 2c of the housing 2 in a state of being almost parallel. Therefore, the sound from the speaker S can be efficiently radiated to the outside through the opening 2cw.

In addition, the cylindrical member 72 provided on the back side of the speaker S makes it difficult for the antiphase sound radiated from the back surface of the speaker S to go to the front side, so that the sound radiated from the front surface hardly interferes with the antiphase sound. Therefore, a decrease in volume can be suppressed. Further, since the speaker S is held by the speaker holder 70 without wobbling and the speaker unit U ₁ is fixed to the fixing portion 60 without wobbling, it is possible to prevent noise such as chatter noise from being generated by the vibration of the speaker S. Is done.

(Embodiment 2)
FIG. 12 is a partial cross-sectional view of the second embodiment of the speaker mounting structure of the present invention as viewed from the left side. In FIG. 12, elements similar to those in FIG. 7 are denoted by the same reference numerals.
As shown in FIG. 12, a first wall 2ax formed along a direction orthogonal to the mold punching direction and a second wall 2cx formed perpendicular to the first wall 2ax along the mold punching direction are provided. In the case of the speaker mounting structure E ₂ of the second embodiment provided in the housing 2x, the left and right contact pieces 72cx in the speaker unit U ₂ are formed so as to be parallel to the axis P of the speaker S.

In this case, the housing 2x can be formed by configuring a part of the lower mold for forming the opening 2cwx of the second wall 2cx as a movable mold that can move in the horizontal direction.
In this way, it is possible to manufacture the speaker mounting structure E _{2 in} which the front surface of the speaker S faces the opening 2cwx of the second wall 2cx that is vertical. In the second embodiment, other configurations are the same as those in the first embodiment.

(Embodiment 3)
FIG. 13 is a partial sectional view of the third embodiment of the speaker mounting structure of the present invention as viewed from the left side. In FIG. 13, the same elements as those in FIGS. 7 and 12 are denoted by the same reference numerals.
In the third embodiment, a first wall 2ay formed along a direction perpendicular to the mold punching direction and a second wall 2cy inclined with respect to the first wall 2ay formed along the mold punching direction are provided. a speaker mounting structure E ₃ provided in the housing 2y having. Also in this case, the housing 2x can be molded by configuring a part of the lower mold that molds the opening 2cwy of the second wall 2cy as a movable mold that can move in the horizontal direction.

In the third embodiment, the speaker unit U ₂ of the _second embodiment (FIG. 12) can be fixed after adding the first and second tapered washers 64 and 65 to the fixing portion 60 described in the first embodiment. In more detail, the first tapered washer 64 is disposed between the contact piece 72cx the boss portion 61 and the speaker unit U _2, second tapered washer 65 is disposed between the contact piece 72cx and the nut member 63 The At this time, the thin portion of the first taper washer 64 is directed forward, and the thick portion of the second taper washer 65 is directed forward.

  Accordingly, the contact piece 72cx can be fixed to the vertical bolt member 62 in a state where the contact piece 72cx is tilted downward toward the front, and the front surface of the speaker S can be opposed to the inclined side wall 2cy in parallel. In the third embodiment, other configurations are the same as those in the first embodiment.

(Embodiment 4)
FIG. 14 is a partial cross-sectional view of the speaker mounting structure according to the fourth embodiment of the present invention as viewed from the left side. In FIG. 14, the same elements as those in FIG. 7 are denoted by the same reference numerals.
In the first to third embodiments (see FIGS. 7 to 13), the speaker unit U ₁ , U ₂ and the bottom wall 2 a are fixed, and the speaker holder 70 is fixed between the tubular member 72 and the cover member 71. Although the bolt-nut connection is exemplified, the present invention is not limited to this fixing method. For example, a fixing method in which a tapping screw is screwed to the boss portion as in the fourth embodiment may be used.

In the embodiment 4, and inserted into the through-hole S _3a1 tapping screws 173 to the left and right of the through-hole 72d and the speaker S of the right and left cylindrical members 72 of the speaker holder 70, the left and right cylindrical through hole of the cover member 71 (the boss portion ) The speaker unit U ₃ is assembled by screwing the tapping screw 173 into the self-tapping 71c.
In the fourth embodiment, the fixing portion 160 includes a boss portion 161 having a cylindrical insertion hole provided in the mold drawing direction, and a tapping screw 162 that is screwed into the insertion hole. Then, the tapping screw 162 of the fixed portion 160 through a washer 163 inserted into the through hole of the contact piece 72c of the speaker holder U _3, by screwing the tapping screw 162 with self-tapping into the insertion hole of the boss portion 161 The speaker piece 171 is fixed to the bottom plate 2a of the casing by pressing the contact piece 72c against the boss 161.
The through hole may be arbitrarily provided depending on the length of the tapping screw and the length of the boss portion, and may not be a through hole.

(Other embodiments)
1. The speaker unit U _{1 of the} first embodiment may be fixed to the fixing portion 60Y of the third embodiment having the first and second tapered washers 64, 65. Accordingly, the front surface of the speaker S of the speaker unit U ₁ shown in FIG. 7 can be made more parallel to the opening 2 cw of the side wall 2 c ₁ .

2. In the speaker holder 70 according to the first embodiment, the contact piece 72c is inclined on the front side of the speaker S in the direction approaching the axis P, but the contact piece is close to the axis on the back side of the speaker S. You may incline in the direction to do.

3. 15 is a perspective view showing a speaker mounting portion of a self-propelled cleaner as a comparison with the embodiment of the present invention, and FIG. 16 is a cross-sectional view of the speaker mounting portion of FIG.
As shown in FIGS. 15 and 16, the self-propelled cleaner includes a casing 111 having a circular bottom wall 111a and an outer peripheral wall 111b that rises gently along the outer peripheral portion of the bottom wall 111a. Sound emission openings 111b ₁ are formed in stripes in a part of the outer peripheral wall 111b, and ribs 111b ₂ are formed between and on both sides of the openings 111b ₁ . The speaker S is disposed in the vicinity of the opening 111b ₁ of the housing 111.

A holding portion 112 that holds the speaker S is provided on the bottom wall 111 a of the casing 111. The holding portion 112 has a pair of front plate 112a erected in front of the right and left ends S _3a of the flange portion S ₃ of the speaker S, and a plate 112b after being erected after the flange portion S _3, The front plate 112a and the rear plate 112b are supported by ribs 112c. That is, by pushing the left and right ends S _3a of the flange portion S ₃ of the speaker S into the V-shaped grooves between the front plate 112a and the rear plate 112b before and after the holding portion 112, the speaker S is perpendicular to the bottom wall 111a. And held in a state directed to the opening 111b ₁ . Note that notch semicircular fitted into the small diameter portion S ₂ of the speaker S is formed on the upper edge of the front plate 112a.

The casing 111 of the self-propelled cleaner described with reference to FIGS. 15 and 16 is a resin molded product formed by removing a mold in a direction perpendicular to the bottom wall 111a (in the direction of the arrow Z). For this reason, forming through holes in the direction perpendicular to the die removal direction (arrow Z direction) in the front plate 112a and the rear plate 112b of the holding portion 112 is a cost increase factor. Therefore, the holes formed in the left and right ends S _3a of the flange portion S ₃ of the speaker S are communicated in accordance with the positions of the through holes, the bolt member is passed through the communication hole, and the nut member is tightened, and the flange portion S ₃ is moved forward. It cannot be fixed to the plate 112a and the rear plate 112b.

Under such circumstances, the speaker S is attached to the housing 111 simply by pushing the left and right ends S _3a of the flange portion S ₃ into a V-shaped groove between the front plate 112a and the rear plate 112b. As a result, a slight gap G is formed between the upper ends of the left and right ends S _3a of the flange portion S ₃ and the upper ends of the front plate 112a and the rear plate 112b, and the speaker S vibrates during operation. 112a and the upper end of the rear plate 112b vibrate to generate a noise called “billing noise”, and in the case of a self-propelled cleaner, the speaker is easily detached due to vibration during running.

  In the case of the self-propelled cleaner shown in FIGS. 14 and 15, the reverse phase sound radiated from the back side of the speaker S turns to the front side, and the sound radiated from the front side of the speaker S to the outside. However, there was a problem that the volume decreased due to interference with the antiphase sound. In addition, since the speaker attachment structure which suppresses the volume reduction | decrease by antiphase sound shown by patent document 1 and 2 is a structure which fixes a speaker to the housing | casing wall part in which the opening for sound radiation was formed, it is self-propelled. It is difficult to apply to the housing of a vacuum cleaner.

Further, as shown in FIG. 16, the speaker S is perpendicular to the bottom wall 111 a, whereas the outer peripheral wall 111 b provided with the opening 111 b ₁ is not parallel to the speaker S but is inclined, so that the speaker S Could not be efficiently radiated to the outside through the opening 111b ₁ .

(Summary)
As described above, the electronic apparatus speaker mounting structure of the present invention is configured. Therefore, in order to enhance the understanding of the present invention, the present invention is summarized below.
According to another aspect of the present invention, there is provided a speaker mounting structure for an electronic device having a first wall along a direction orthogonal to a mold drawing direction and a second wall along a mold drawing direction in resin molding. A fixing portion provided on an inner surface of one wall, a speaker provided in the housing, and a speaker holder for holding the speaker and fixing the speaker to the fixing portion so that a front surface of the speaker faces the second wall. And the speaker holder has a cylindrical member provided on the periphery of the speaker on at least the back side .
The speaker mounting structure for an electronic device according to the present invention only needs to have the above-described configuration, and may be configured as follows.

( 1 ) The second wall intersects with the first wall at an angle,
The speaker may be fixed while being inclined with respect to the first wall so that a front surface of the speaker faces the second wall. For example, the angle θ at which the first wall and the second wall intersect may be greater than 90 ° (see FIG. 7).
In other words, the second wall intersects with the first wall so as to be inclined outward, and the speaker has an angle β at which the front of the speaker and the first wall intersect with each other so as to be smaller than 90 °. The front surface may be fixed while being inclined toward the second wall (see FIG. 7).
In this way, the speaker held by the speaker holder can be directly opposed to the second wall inclined obliquely upward toward the outside of the bowl-shaped housing, so that the sound of the speaker can be efficiently used. It can radiate well outside.

( 2 ) The fixing portion has a boss portion having a screw insertion hole provided in the mold drawing direction, a bolt member inserted through the screw insertion hole, and a nut member screwed into the bolt member. And
The speaker holder has a contact piece having a through hole,
The speaker member may be fixed to the housing by pressing the contact piece against the boss portion by screwing the nut member onto the bolt member inserted through the screw insertion hole and the through hole. .
In this way, the speaker holder holding the speaker can be easily fixed to the housing. Further, the angle of the speaker axis with respect to the first wall of the housing can be defined by the angle of the contact piece with respect to the speaker axis. For example, if the contact piece is parallel to the axis of the speaker, the front surface of the speaker can be perpendicular to the first wall of the housing. Further, when the contact piece is not parallel to the speaker axis, the front surface of the speaker can be brought closer to or away from the first wall of the housing.

( 3 ) Instead of ( 2 ), the following may be used.
That is, the fixed portion has a boss portion having an insertion hole provided in the mold drawing direction, and a tapping screw screwed into the insertion hole,
The speaker holder has a contact piece having a through hole,
The speaker holder may be fixed to the housing by pressing the contact piece against the boss portion by screwing the tapping screw into at least one of the insertion hole and the through hole by self-tapping.
Even if it does in this way, the effect similar to said ( 2 ) will be acquired.

( 4 ) In the case of ( 2 ) or ( 3 ), the fixing portion may further include a taper washer through which the bolt member or the tapping screw is inserted.
If it does in this way, direction of the front of a speaker to the 1st wall of a case can be adjusted with a taper washer.

( 5 ) The speaker holder may have a cover member provided around the front of the speaker.
This makes it easier for the cover member to radiate the sound radiated from the front of the speaker, which is advantageous for radiating the sound to the outside without reducing the volume. It will also protect you.

( 6 ) The case is a case of a self-propelled electronic device having a bottom wall as the first wall and a side wall as the second wall provided along an outer peripheral portion of the bottom wall. May be.
In this way, it is possible to obtain a self-propelled cleaner that can prevent chatter noise and can efficiently radiate the sound of the speaker to the outside with a sufficient volume.

1 Cleaning robot (self-propelled electronic equipment)
2, 2x, 2y Housing 2a Bottom wall 2ax, 2ay First wall 2c Side wall 2cx, 2cy Second wall 60, 60Y Fixed portion 61, 161 Boss portion 62 Bolt member 63 Nut member 64 First taper washer 65 Second taper washer 70 Speaker holder 71 Cover member 72 Cylinder member 72c Contact piece 72e Long hole (through hole)
162, 173 Tapping screw P Axis center S Speaker Z Die removal direction θ angle

Claims (7)

A fixing portion provided on the inner surface of the first wall of the housing of the electronic device product having a first wall along a direction orthogonal to a mold drawing direction and a second wall along the mold drawing direction in resin molding; A speaker provided in the housing; and a speaker holder for holding the speaker and fixing the speaker to the fixing portion so that a front surface of the speaker faces the second wall ;
A speaker mounting structure for an electronic apparatus, wherein the speaker holder has a cylindrical member provided at a rear side at least on a peripheral portion of the speaker. The second wall intersects the first wall at an angle;
2. The speaker mounting structure according to claim 1, wherein the speaker is fixed while being inclined with respect to the first wall so that a front surface of the speaker faces the second wall. The electronic device speaker mounting structure according to claim 2 , wherein an angle between the first wall and the second wall is greater than 90 °. The speaker holder has a contact piece having a through hole,
The fixing portion includes a boss portion having a screw insertion hole provided in a mold drawing direction, and a bolt inserted into the screw insertion hole and the through hole in a state where the contact piece is in contact with the boss portion. A member, and a nut member that is screwed onto the screw insertion hole and the bolt member that is inserted into the through hole so as to press the contact piece against the boss portion and fix the speaker holder to the housing. speaker mounting structure of an electronic device according to any one of claims 1 to 3 for Yes. The speaker holder has a contact piece having a through hole,
The fixing portion includes a boss portion having an insertion hole provided in a mold drawing direction and the boss portion so that the contact piece is pressed against the boss portion to fix the speaker holder to the housing. speaker electronic apparatus according to any one of claims 1 to 3 which have a and tapping screws screwed by self-tapping with at least one of said insertion hole and said through-hole in a state of being abutted against the contact piece Mounting structure. Speaker mounting structure of an electronic device according to the speaker holder, any one of claims 1 to 5 having a cover member provided on the periphery of the front of the speaker. A self-propelled cleaner provided with the speaker mounting structure according to any one of claims 1 to 6 .