JP2001078286A - Structure of loudspeaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the assembling of a loudspeaker by using fixed parts of a pair of cases and the loudspeaker in common to reduce fixing members such as screws and their fixing parts. SOLUTION: In this structure for loudspeaker, a tentative fixing section 22 to tentatively fixing a loudspeaker 2 is provided to an upper end face of a hollow boss section 21 provided to a lower case 4, the hollow boss section 21 and the mount boss section 20 are tightened by screws 24 while a loudspeaker 2 tentatively fixed by the tentative fixing section 22 is clamped between the hollow boss section 21 and the mount boss section 20 provided to the upper case 3 to fix the loudspeaker 2 into a musical instrument body 1. Thus, the fixing part of the upper case 3, the lower case 4 and the fixing part of the loudspeaker 2 are used in common, the number of the screws 24 and screw fastening parts can be decreased more than those of a conventional structure so as to simplify the assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker structure used for audio equipment such as an electronic musical instrument.

[0002]

2. Description of the Related Art Conventionally, some electronic musical instruments, such as electronic pianos, include a musical instrument body (equipment body) 1 provided with a speaker 2 as shown in FIG. The instrument body 1 of this electronic musical instrument comprises an upper case 3 and a lower case 4,
The speaker 2 includes a speaker body 5 and a cone section 6. In the upper case 3, a sound emission hole 7 is provided corresponding to the cone portion 6 of the speaker 2. On the inner surface of the upper case 3 near the periphery of the sound emission hole 7, speaker mounting bosses 8 are provided corresponding to the four corners near the periphery of the sound emission hole 7 of the upper case 3. These speaker mounting bosses 8 are for mounting the speakers 2 therein.
A screw hole 8a is formed from below. That is, the gasket 9 provided on the cone portion 6 of the speaker 2 is positioned on each speaker mounting boss portion 8, and in this state, the cone portion 6 of the speaker 2 is attached with the screw 10 screwed into the screw hole 8a.

A case mounting boss 11 is provided on the inner surface of the upper case 3 near the speaker mounting boss 8. The height of the case mounting boss 11 is higher than the height of the speaker mounting boss 8, and a screw hole 11a is formed in a lower portion of the case mounting boss 11 from below. On the other hand, a hollow boss 12 is provided at the bottom in the lower case 4 so as to correspond to the case mounting boss 11 of the upper case 3. Each of the hollow boss portions 12 is provided with an insertion hole 12a for inserting a screw 13 at each upper end surface thereof.
The screw 13 inserted into the upper case 3 is attached to the case mounting boss 11 of the upper case 3 by screwing into a screw hole 11 a formed in the case mounting boss 11 of the upper case 3. Thereby, the upper case 3 and the lower case 4 are joined to each other to form the musical instrument main body 1.

[0004] A speaker net 14 is provided on the upper surface of the upper case 3 so as to cover the sound emission hole 7 of the upper case 3. That is, this speaker net 14
As shown in the figure, the peripheral portion 16 of the speaker net 14 is inserted into the net mounting groove 15 provided near the peripheral edge of the sound emission hole 7 of the upper case 3, and in this state, the peripheral portion 16 of the speaker net 14 is welded by high frequency welding. It is fixed in the net mounting groove 15.

In such an electronic musical instrument, when the speaker 2 is mounted in the musical instrument main body 1, first, the gasket 9 of the speaker 2 is positioned so as to correspond to the speaker mounting boss 8 of the upper case 3, and in this state, Cone part 2
Is attached to the speaker mounting boss 8 of the upper case 3 with screws 10. Thereafter, the case mounting boss 1 of the upper case 3
1 and the hollow boss 12 of the lower case 4
3 Thus, the upper case 3 and the lower case 4 are joined to form the musical instrument main body 1, and the speaker 2 is mounted inside the musical instrument main body 1.

[0006]

However, in such a speaker structure of an electronic musical instrument, the speaker 2 is mounted on the speaker mounting boss 8 of the upper case 3 with screws 10 and then the case mounting boss 11 of the upper case 3 is mounted. And the hollow boss 12 of the lower case 4 are fastened by the screw 13,
Screw 10 for attaching speaker 2 and upper case 3
In addition, a screw 13 for attaching the lower case 4 is required, so that the number of the screws 10 and 13 is increased and the number of screwing points is increased, so that there is a problem that the assembling work is complicated and troublesome.

In this speaker structure, the upper case 3
Since the speaker net 14 is attached to the upper case 3 by inserting the peripheral portion 16 of the speaker net 14 into the net mounting groove 15 provided near the periphery of the sound emission hole 7 and fixing the speaker net 14 by high-frequency welding. There is a problem that the net 14 cannot be easily removed from the upper case 3 and the speaker net 14 cannot be easily separated when the used parts are recycled.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a common fixing point for both a pair of cases and a speaker, to reduce fixing members such as screws and the fixing points, and to simplify the assembling work. Another object of the present invention is to make it possible to easily remove the speaker net from the device main body, and to easily separate the speaker net used at the time of recycling.

[0009]

According to the first aspect of the present invention,
A device main body including a pair of cases, a speaker disposed in the device main body, a first mounting portion provided in one case of the device main body and having a temporary fixing portion for temporarily fixing the speaker; A second mounting portion corresponding to the first mounting portion via the speaker provided on the other case of the main body and temporarily fixed by the temporary fixing portion; and a first mounting portion and the second mounting portion. With the speaker temporarily fixed by the temporary fixing portion therebetween, the first mounting portion and the second
And a fixing member for fixing the speaker by fastening the mounting portion. According to the present invention, the speaker is temporarily fixed by the temporary fixing portion of the first mounting portion provided in one case of the device main body, and the speaker is sandwiched between the first mounting portion and the second mounting portion in this state. Since the speaker is fixed in the device body by fastening the first mounting portion and the second mounting portion with a fixing member, the fixed portion of the pair of cases and the fixed portion of the speaker can be shared. For this reason, the number of fixing members and the number of fixing portions can be reduced as compared with the conventional one, so that the assembling work can be simplified.

[0010] In this case, as in claim 2, the other case is provided with a positioning guide portion for guiding the speaker temporarily fixed by the temporary fixing portion of the one case to a predetermined position. Then, the speaker temporarily fixed to the temporary fixing portion can be guided to the predetermined position of the pair of cases by being guided by the positioning guide portion, and the speaker can be accurately fixed in the device body. Further, as described in claim 3, on the opposing surfaces of the pair of cases, partition portions surrounding the speaker are formed so as to face each other, and among these partition portions, the partition portion of at least one case is a pair. If the structure includes a hollow pedestal portion formed by connecting the distal ends of the support walls and a rib formed at the distal end of the pedestal portion, even if the distance between the opposing surfaces of the pair of cases is large, The rigidity of the entire partition part of at least one of the cases can be increased by the hollow pedestal part formed by connecting the tips of the support walls, thereby preventing vibration of the partition part by the speaker and obtaining good acoustic characteristics. Can be.

According to a fourth aspect of the present invention, there is provided an apparatus body provided with a sound emission hole, a speaker provided in the equipment body corresponding to the sound emission hole, and the sound emission hole of the equipment body. It is characterized by comprising a speaker net to be covered, and attaching means for detachably attaching a peripheral portion of the speaker net to the device main body. According to the present invention, since the peripheral portion of the speaker net is detachably attached to the device main body by the attachment means, the speaker net can be detached from the device main body, thereby easily separating the speaker net used at the time of recycling. be able to.

In this case, as set forth in claim 5, the mounting means is provided at a locking hole provided in the main body of the device near the periphery of the sound emission hole, and at a periphery of the speaker net. And the engaging portion of the speaker net is fixed to the device main body by inserting the engaging portion into the locking hole so as to be releasably engaged with the device main body. The speaker net can be temporarily fixed to the device main body by being inserted into and engaged with the locking hole of the device. In this state, the engaging portion can be securely fixed to the device main body by the screw member. By removing the member, the fixing of the engaging portion of the speaker net can be released, and in this state, the speaker net can be easily detached from the device main body by detaching the engaging portion of the speaker net from the locking hole of the device main body. To be removed It can be.

According to a sixth aspect of the present invention, the mounting means is alternately provided on a net mounting groove provided in the main body of the device and into which a peripheral portion of the speaker net is inserted, and an opposing surface in the net mounting groove. If it is provided with a holding portion for holding the peripheral portion of the speaker net, the peripheral portion of the speaker net is inserted into the net mounting groove of the device body so that the peripheral portion of the speaker net is inserted into the net mounting groove. The speaker net can be attached to the equipment body by being sandwiched by the alternately formed holding parts on the opposite surface of the speaker net, and the peripheral part of the speaker net is attached to the net against the holding force of the holding part in the net mounting groove. By extracting the speaker net from the groove, the speaker net can be easily removed from the device body.

Further, as set forth in claim 7, the attachment means includes a net attachment groove provided in the device main body,
An elastic fixing member that fits around the periphery of the speaker net and that is elastically press-fitted into the net groove; the elastic fixing member is fitted to the periphery of the speaker net; By elastically press-fitting into the net mounting groove of the device body together with the peripheral edge of the speaker net,
The speaker net can be attached to the device main body, and by extracting the peripheral edge of the speaker net from the inside of the net attachment groove against the elastic pressure input of the elastic fixing member,
The speaker net can be removed from the device body.
In this case, as described in claim 8, if the inner surface of the net mounting groove is provided with a convex portion that bites into the elastic fixing member, when the elastic fixing member is pressed into the net mounting groove, the convex portion is formed. Because the part elastically bites into the elastic fixing member,
The elastic fixing member can be securely fixed in the net mounting groove, and a highly airtight member can be obtained.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment in which the speaker structure of the present invention is applied to an electronic musical instrument will be described below with reference to FIGS. The same parts as those in the conventional example shown in FIGS. 11 and 12 are denoted by the same reference numerals, and description thereof will be omitted. In this electronic musical instrument, a hollow boss portion 21 as a first attachment portion for temporarily fixing the speaker 2 is provided at the bottom of the lower case 4, and an attachment boss portion 20 as a second attachment portion is provided on the inner surface of the upper case 3. Other than these, the configuration is almost the same as the conventional example. That is, as shown in FIG. 1, the mounting boss portions 20 of the upper case 3 are provided at four corners near the periphery of the sound emission hole 7 of the upper case 3. The speaker 2 is positioned and attached to these mounting bosses 20, and a screw hole 20a is formed therein from below.

The hollow boss portions 21 of the lower case 4 are provided corresponding to the respective mounting boss portions 20, as shown in FIG. A temporary fixing portion 22 for temporarily fixing the speaker 2 is provided at an upper end portion of the hollow boss portion 21 located at two places on the lower side of the cone portion 6 of the speaker 2 shown in FIG. ing. These two temporary fixing portions 22
As shown in FIG. 3, the upper end of the hollow boss 21 is
The end portion of the cone portion 6 of the speaker 2 is sandwiched between the protruding portion and the upper end surface of the hollow boss portion 21 so that the speaker 2 is temporarily fixed. ing. In this case, the two temporary fixing portions 22
The two hollow bosses 22 are provided at the upper ends of the hollow bosses 22 so as to be opposed to each other, thereby sandwiching the cone 6 of the speaker 2 from both sides with some margin, and also in the front-rear direction (vertical direction in FIG. 2) perpendicular to this. It is configured to move slightly. As shown in FIG. 2, position regulating ribs 23 for regulating the position of the cone 6 of the speaker 2 are provided on the inner surfaces of the four hollow bosses 21 and the lower case 4.

The upper end surfaces of the four hollow boss portions 21 are provided with insertion holes 25 into which screws 24 are inserted. In this case, the insertion holes 25 of the two hollow boss portions 21 provided with the temporary fixing portions 22 are formed without overlapping the temporary fixing portions 22. Also, the cone 6 of the speaker 2
As shown in FIG. 2, through holes 26 corresponding to the respective insertion holes 25 of the hollow boss 21 are provided at the four corners. These through holes 26 are formed in a long hole shape slightly larger than the respective insertion holes 25 so as to correspond to the respective insertion holes 25 of the hollow boss portion 21 with a margin. The screw 24 is inserted into the hollow boss 21 from the lower side of the lower case 4, and the tip of the screw 24 passes through the insertion hole 24 of the hollow boss 21 and the through hole 26 of the speaker 2. Of the horn 6 of the speaker 2
The mounting boss 20 and the hollow boss 21 are fastened to each other across the end of the boss.

On the inner surface of the upper case 3, as shown in FIG. 1, a positioning guide for guiding and positioning the speaker 2 temporarily fixed to the hollow boss portion 21 of the lower case 4 with respect to each mounting boss portion 20. A portion 27 is provided corresponding to each mounting boss portion 20. These positioning guides 27
When the upper case 3 and the lower case 4 are butt-assembled, the edges of the cone portion 6 of the speaker 2 come into contact with each other, thereby guiding the temporarily fixed speaker 2 to each mounting boss portion of the upper case 3. The two screw holes 20a, the through-holes 26 at the four corners of the speaker 2, and the insertion holes 25 of the hollow boss portions 21 of the lower case 4 are positioned at corresponding predetermined positions. As shown in FIG. 1, a speaker net 14 is attached to the upper surface of the upper case 2 so as to cover the sound emission hole 7. Further, as shown in FIG. 2, a keyboard portion 28 in which white keys and black keys are arranged is provided on the lower case 4 so as to be exposed upward.

In such a speaker structure of an electronic musical instrument,
As shown in FIG. 1, the speaker 2 is inserted into the hollow boss portion 21 by inserting two corners of the cone portion 6 of the speaker 2 into the temporary fixing portion 22 of each hollow boss portion 21 provided in the lower case 4. Can be temporarily fixed. In this state, the upper case 3 and the lower case 4 are abutted sideways. That is, when each of the cases 3 and 4 is turned sideways (that is, the state of FIG. 1 is rotated 90 ° counterclockwise) with the left sides of the upper case 3 and the lower case 4 shown in FIG. As shown by the dotted line in FIG. 1, the temporarily fixed speaker 2 is inclined.

However, at this time, the edge of the cone portion 6 of the speaker 2 temporarily fixed to the hollow boss portion 21 of the lower case 4 comes into contact with the positioning guide portion 27 of the upper case 3, and the positioning guide portion 27 2 is guided and positioned at a predetermined position. Thereby, the screw holes 20 a of the mounting bosses 20 of the upper case 3, the through holes 26 at the four corners of the speaker 2, and the insertion holes 25 of the hollow bosses 21 of the lower case 4 correspond to each other. In this state, screws 24 are inserted into the respective hollow boss portions 21 from the lower case 4 side, and the tips of these screws 24 are inserted through the insertion holes 25 of the hollow boss portion 21 and the through holes 26 at the four corners of the speaker 2. 3 is screwed into the screw hole 20a in the mounting boss 20. As a result, the speaker 2 is positioned and fixed between the mounting boss portion 20 of the upper case 3 and the hollow boss portion 21 of the lower case 4, and the upper case 3 and the lower case 4 are assembled at the same time. 1 is assembled.

As described above, in this speaker structure, the speaker 2 is temporarily fixed to the temporary fixing portion 22 provided on the hollow boss portion 21 of the lower case 4, and in this state, the mounting boss portion 20 of the upper case 3 and the lower case 4 are fixed. The speaker 2 can be fixed in the musical instrument main body 1 by fastening the hollow boss portion 21 of the lower case 4 with the screw 24. Therefore, the mounting boss portion 20 of the upper case 3 and the hollow boss portion 21 of the lower case 4 The mounting locations of the upper case 3 and the lower case 4 and the mounting location of the speaker 2 can be made common, so that the screws 24
And the number of places where the screws 24 are fastened can be halved, which greatly simplifies the assembling work. In this case, since the upper case 3 is provided with the positioning guide portion 27 for guiding and positioning the speaker 2 temporarily fixed to the temporary fixing portion 22 of the lower case 4 to a predetermined position, the temporary fixing portion 22 is temporarily provided. Even if the position of the stopped speaker 2 is slightly displaced, when the upper case 3 and the lower case 4 are butted and assembled, the speaker 2 can be guided by the positioning guide portion 27 and positioned at a predetermined position. Thus, the speaker 2 can be fixed in the musical instrument main body 1 with higher accuracy.

[Second Embodiment] Next, referring to FIG.
A second embodiment in which the speaker structure of the present invention is applied to an electronic musical instrument will be described. In this case, the same portions as those of the first embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and description thereof will be omitted. The speaker structure of this electronic musical instrument differs from the first embodiment in the mounting structure of the speaker net 14, and has the same configuration as the first embodiment except for this. That is, in the vicinity of the sound emitting hole 7 in the upper case 3, FIG.
As shown in FIG. 3, a net mounting groove 30 into which the peripheral portion 16 of the speaker net 14 is inserted is provided. A locking hole 31 is provided at a predetermined position on the bottom of the net mounting groove 30. That is, these locking holes 31 are configured such that predetermined portions of the bottom of the net mounting groove 30 are respectively cut out in a concave shape, thereby penetrating the predetermined portions of the net mounting groove 30 vertically.

At the lower end of the peripheral edge portion 16 of the speaker net 14 inserted into the net mounting groove 30, an engaging hook 32 which is inserted into an engaging hole 31 and engages removably is provided in each of the engaging holes 3.
1 is provided. These engaging hooks 32
Are formed by being bent in a substantially inverted “L” shape, and when they are inserted into the locking holes 31 of the net mounting groove 30, they are elastically deformed in directions approaching each other, and are inserted into the lower side of the locking holes 31. When it protrudes, the tip returns to the net mounting groove 3
The lower end of the upper case 3 is temporarily fixed to the upper case 3. In this case, the engagement hook is formed to be longer than the depth of the notch recess of the locking hole 31, so that the lower end protrudes below the locking hole 31. A screw mounting hole 33 is provided on the inner surface of the upper case 3 in correspondence with each locking hole 31. In these screw mounting holes 33, fixing screws 34 are provided.
Attached through. The holding plate 35 is a washer having a large diameter, abuts against the lower end of the engaging hook 32 of the speaker net 14, and presses the lower end of the engaging hook 32 of the speaker net 14 in accordance with the tightening of the fixing screw 34. Thereby, the tip of the engaging hook 32 is pressed against the lower end surface of the net mounting groove 30 to be fixed.

In such a speaker structure of an electronic musical instrument,
Before assembling the upper case 3 and the lower case 4, the peripheral portion 16 of the speaker net 14 is
0 of the speaker net 14
Is inserted into the locking hole 31 of the net mounting groove 30 to protrude downward. At this time, the engaging hooks 32 are elastically deformed in a direction approaching each other and are inserted into the locking holes 31. When the engaging hooks 32 project below the locking holes 31, the engaging hooks 32 elastically return. The tip of the speaker net 14 abuts on the lower end surface of the net mounting groove 30, whereby the speaker net 14 is temporarily fixed to the upper case 3. In this state, when the fixing screw 34 is attached to the screw attachment hole 33 provided on the inner surface of the upper case 3 via the holding plate 35, the holding plate 35 is
Hook 3 of the speaker net 14 according to the tightening of the
2 is pressed, whereby the tip of the engagement hook 32 is pressed against the lower end surface of the net mounting groove 30, so that the speaker net 14 is securely fixed to the upper case 3.

In this speaker structure, the upper case 3
With the upper case 3 and the lower case 4 detached from each other,
When the fixing screw 34 is loosened and removed from the screw mounting hole 33, the pressing of the engaging hook 32 by the pressing plate 35 is released, whereby the engaging hook 32 becomes elastically deformable. The engagement hooks 32 can be pulled out from the locking holes 31 of the net mounting groove 30 by elastically deforming the engagement hooks 32 toward each other. As a result, the speaker net 14 can be easily removed from the upper case 3, so that when the used parts are recycled, the speaker net 14 can be easily separated and can be reused satisfactorily. .

Third Embodiment Next, a third embodiment in which the speaker structure of the present invention is applied to an electronic musical instrument will be described with reference to FIGS. Also in this case, FIG.
-The same parts as those of the first embodiment shown in Fig. 3 are denoted by the same reference numerals, and description thereof will be omitted. The speaker structure of this electronic musical instrument differs from the first embodiment in the mounting structure of the speaker net 14, and has the same configuration as the first embodiment except for this. That is, the upper case 3 includes the speaker net 14
Is provided near the periphery of the sound output hole 7. On opposite surfaces in the net mounting groove 40, holding ribs 41, 42 for sandwiching the peripheral portion 16 of the speaker net 14 are provided alternately.

Of these holding ribs 41, 42, the holding rib 41 is, as shown in FIG.
An inclined portion 41a is provided on the right side of the inside, and is inclined upward to the right from a substantially middle position of the bottom of the net mounting groove 40 toward the upper right end, and a locking projection 41b is formed below the inclined portion 41a. Configuration. As shown in FIG. 6B, the holding rib 42 is provided on the left side in the net mounting groove 40, and is inclined upward and leftward from a substantially middle position of the bottom of the net mounting groove 40 toward the upper left end. Inclined part 4
2a is formed, and a locking projection 4 is formed below the inclined portion 42a.
2b is formed. In this case, each locking projection 41b of the right holding rib 41 is attached to the net mounting groove 40.
Each of the locking protrusions 42b of the left holding rib 42 slightly protrudes rightward from a substantially middle position of the net mounting groove 40.

In such a speaker structure of an electronic musical instrument,
When the peripheral edge portion 16 of the speaker net 14 is inserted into the net mounting groove 40 of the upper case 3, the inclined portions 41a of the holding ribs 41 and 42 alternately formed in the net mounting groove 40,
The peripheral edge 16 of the speaker net 14 is guided and inserted by 42a, and the peripheral edge 16 is inserted into each of the holding ribs 41, 42.
The speaker net 1
The outer peripheral portion 16 of the base member 4 is held in the net mounting groove 40 by being held between the holding ribs 41 and 42. That is, since the holding ribs 41 and 42 are formed alternately in the net mounting groove 40, the peripheral edge 16 of the speaker net 14 is pressed toward the left by the right holding rib 41, and the left holding rib 42 is pressed. By speaker net 1
4 is pressed toward the right side, and as shown in FIG. 5, the peripheral portion 16 of the speaker net 14 is bent and clamped in a wave shape, whereby the peripheral portion 16 of the speaker net 14 is It is mounted in the mounting groove 40. In this case, when the lower end of the peripheral portion 16 of the speaker net 14 is inserted deeply so as to contact the bottom of the net mounting groove 40, the lower end of the inclined portions 41a, 42a of the holding ribs 41, 42 is formed. Since the locking projections 41b and 42b lock the peripheral edge 16 of the speaker net 14, the peripheral edge 16 of the speaker net 14 can be securely fixed in the net mounting groove 40.

In this speaker structure, the upper case 3
By pressing the speaker net 14 from the inside of the upper case 3 with the and the lower case 4 removed, the peripheral portion 16 of the speaker net 14 can be removed from the net mounting groove 40. That is, at this time, the locking force of the peripheral portion 16 of the speaker net 14 by the locking projections 41b and 42b formed on the inclined portions 41a and 42a of the holding ribs 41 and 42, and the locking force in the net mounting groove 40 alternately. By simply pressing the speaker net 14 from the inside of the upper case 3 against the holding force of the provided holding ribs 41 and 42, the peripheral portion 16 of the speaker net 14 can be easily removed from the net mounting groove 40. it can. As a result, similarly to the second embodiment, the speaker nets 14 can be easily separated when the used parts are recycled, and can be reused satisfactorily.

Fourth Embodiment Next, a fourth embodiment in which the speaker structure of the present invention is applied to an electronic musical instrument will be described with reference to FIGS. Also in this case, FIG.
-The same parts as those of the first embodiment shown in Fig. 3 are denoted by the same reference numerals, and description thereof will be omitted. The speaker structure of this electronic musical instrument is different from the first embodiment in the mounting structure of the speaker net 14, and is substantially the same as the first embodiment except for this.

That is, in the upper case 3, a net mounting groove 51 into which the peripheral portion 16 of the speaker net 14 is pressed together with the elastic fixing member 50 is provided in the vicinity of the sound output hole 7. A locking hole 52 is provided at the bottom of the net mounting groove 51. The locking hole 52 is configured so as to penetrate the net mounting groove 51 up and down at a predetermined spread angle θ by cutting the bottom of the net mounting groove 51 into a concave shape. In addition, at least one of the inner surfaces (the inner surface on the left side in FIGS. 7 and 8) of the opposing surfaces of the net mounting groove 51 has a convex portion 5 that bites into the elastic fixing member 50.
3 is provided near the upper portion of the locking hole 52.
The convex portion 53 is formed in a gently inclined mountain shape.

The elastic fixing member 50 is made of an elastic material such as rubber, and has a U-shaped cross section as shown in FIG. Inside the elastic fixing member 50, a net fitting recess 54 into which the peripheral edge portion 16 of the speaker net 14 is inserted and fitted from above is formed, and a lower outer surface thereof has
A constriction 55 is formed. This elastic fixing member 50
In a state in which the lower side of the constricted portion 55 is inserted into the locking hole 52 of the net mounting groove 51 and the convex portion 53 of the net mounting groove 51 bites into the constricted portion 55, it is elastically pressed into the net mounting groove 51. It is configured to be.

In such a speaker structure of an electronic musical instrument,
The peripheral edge 16 of the speaker net 14 is inserted into the net fitting recess 54 of the elastic fixing member 50, and in this state, the elastic fixing member 50 is elastically inserted into the net mounting groove 51 of the upper case 3 together with the peripheral edge 16 of the speaker net 14. Then, the lower side of the constricted portion 55 of the elastic fixing member 50 is inserted into the locking hole 52 of the net mounting groove 51, and the constricted portion 55 corresponds to the convex portion 53 of the net mounting groove 51. Thereby, the speaker net 14 can be easily attached to the upper case 3.

At this time, as shown in FIG. 8, the lower side of the narrow portion 55 of the elastic fixing member 50 is
Of the speaker net 14 together with the elastic fixing member 50 is securely inserted into the net mounting groove 51 because the convex portion 53 of the net mounting groove 51 bites into the constricted portion 55. Can be fixed,
A highly sealed product can be obtained. In particular, since the inner surface of the net fitting recess 54 of the elastic fixing member 50 elastically bites into the mesh of the peripheral portion 16 of the speaker net 14 as shown in FIG. The peripheral portion 16 of the net 14 can be securely fixed.

When the speaker net 14 is detached from the upper case 3, the elastic fixing member 50 is formed of an elastic material such as rubber. The speaker net 14 can be easily removed from the upper case 3 by extracting the peripheral portion 16 of the speaker net 14 from the upper case 3. in this case,
Since the convex portion 53 provided on the inner surface of the net mounting groove 51 is formed in a gently inclined mountain shape, the peripheral portion 16 of the speaker net 14 is easily extracted from the inside of the net fitting concave portion 54 of the elastic fixing member 50. be able to. Note that, with the speaker net 14 removed, the elastic fixing member 5
When 0 is left in the net mounting groove 51, a tool such as a screwdriver is inserted from below into the locking hole 52 at the bottom of the net mounting groove 51 to push up the elastic fixing member 50, so that the inside of the net mounting groove 51 is raised. To elastic fixing member 5
0 can be easily removed. As a result, similarly to the second embodiment, the speaker nets 14 can be easily separated when the used parts are recycled, and can be reused satisfactorily.

[Fifth Embodiment] Next, FIG. 9 and FIG.
A fifth embodiment in which the speaker structure of the present invention is applied to an electronic musical instrument will be described with reference to FIG. Also in this case, the same parts as those of the first embodiment shown in FIGS. The speaker structure of this electronic device is
The speaker section 60 and the musical instrument body (equipment body) 61 are the first
Other than this, the structure is almost the same as that of the first embodiment. In other words, the speaker unit 60
As shown in FIG.
3 and a pass reflex port 64, which are provided in the musical instrument main body 61. As in the first embodiment, the musical instrument main body 61 includes an upper case 3 and a lower case 4, and partitions 65, 66 surrounding the speaker unit 60 are formed on the upper and lower opposing surfaces inside thereof so as to face each other. ing.

The partitions 65 and 66 are connected to the speaker 6
0 for sealing the upper partition 65.
As shown in FIG. 10, the upper rib 65a is formed of an upper rib 65a formed substantially perpendicularly to the upper inner surface of the upper case 3, and reinforcing ribs 65b formed on both sides thereof. The lower partition 66 includes a hollow pedestal 67 formed substantially perpendicular to the lower inner surface of the lower case 4 and a lower rib 68 formed on the upper end surface of the pedestal 67. This lower rib 68
A rubber packing 69 is mounted on the upper end of the lower rib 68, and the lower rib 68 and the upper rib 65a are configured to face each other with the rubber packing 69 interposed therebetween. In this case, the pedestal 67 has a structure in which the upper ends of a pair of support walls 67a formed substantially perpendicular to the bottom of the lower case 4 are connected, and a reinforcing rib 67b is formed between the pair of support walls 67a. ing. The lower partition 66 is formed at substantially the same height as the depth of the lower case 4.
6 is formed at a height of half or more of the height. The lower rib 68 is formed such that its length in the height direction is sufficiently shorter than the length of the pedestal portion 67 in the height direction.

In such a speaker structure of an electronic musical instrument,
Of the partitioning portions 65, 66 formed on the facing surface of the upper case 3 and the lower case 4 so as to face each other, the partitioning portion 66 of the lower case 4 is formed by connecting the upper ends of a pair of support walls 67a to each other. Since the base 67 and the lower rib 68 formed at the upper end of the base 67 are formed, the thickness of the pair of support walls 67 a of the base 67 is substantially the same as the thickness of the lower case 4. In addition, since the height of the pedestal portion 67 in the height direction is sufficiently longer than the length of the lower rib 68 in the height direction, the upper case 3 and the lower case 4 face each other. Even if the spacing between the surfaces is large, the rigidity of the entire lower partition 66 can be sufficiently increased by the pedestal 67 of the lower partition 66.
5, 66 can be suppressed, and good acoustic characteristics can be obtained.

In the first to fifth embodiments, the case where the present invention is applied to an electronic musical instrument such as an electronic piano has been described. However, the present invention is not limited to this, and can be widely applied to other audio equipment such as a CD radio cassette player. it can.

[0040]

As described above, according to the first aspect of the present invention, the first device provided in one case of the device main body.
The speaker is temporarily fixed at the temporary fixing portion of the mounting portion, and in this state, the first mounting portion and the second mounting portion are fastened by a fixing member with the speaker sandwiched between the first mounting portion and the second mounting portion. By
Since the speaker is fixed in the device main body, the fixing point of the pair of cases and the fixing point of the speaker can be made common, so that the number of fixing members and the fixing point can be reduced as compared with the conventional one. Thus, the assembly work can be simplified.

In this case, the other case is provided with a positioning guide portion for guiding the speaker temporarily fixed at the temporary fixing portion of the one case to a predetermined position.
The speaker temporarily fixed to the temporary fixing portion can be guided to the predetermined position of the pair of cases by being guided by the positioning guide portion, so that the speaker can be accurately fixed in the device body. In addition, partition portions surrounding the speakers are formed on the facing surfaces of the pair of cases so as to face each other,
Of these partition portions, at least one of the case partition portions includes a hollow pedestal portion formed by connecting the tips of a pair of support walls, and a rib formed at the tip of the pedestal portion. Even if the distance between the opposing surfaces in the case is large, the rigidity of the entire partition portion of at least one of the cases can be sufficiently increased by the hollow pedestal portion formed by connecting the tips of the pair of support walls. Vibration of the partition by the speaker can be prevented, and good acoustic characteristics can be obtained.

According to the fourth aspect of the present invention, since the peripheral portion of the speaker net covering the sound emission hole of the device main body is detachably attached to the device main body by the attaching means, the speaker net is detached from the device main body. As a result, the speaker nets used at the time of recycling can be easily separated and can be reused satisfactorily. In this case, the mounting means is provided on the device main body located near the peripheral edge of the sound emission hole, and is provided on the peripheral portion of the speaker net and is inserted into the locking hole and engages detachably. By providing the engaging portion and the screw member for fixing the engaging portion to the device main body, the fixing of the engaging portion of the speaker net can be released by removing the screw member. The speaker net can be easily removed from the device main body by detaching the engaging portion from the locking hole of the device main body.

Further, the mounting means is provided in the main body of the apparatus and has a net mounting groove into which the peripheral edge of the speaker net is inserted, and the mounting means are alternately formed on opposing surfaces in the net mounting groove to sandwich the peripheral edge of the speaker net. By providing the holding portion, the speaker net can be mounted on the main body of the device by holding the peripheral portion of the speaker net with the holding portion formed alternately on the opposing surface in the net mounting groove. By pulling out the periphery of the speaker net from the inside of the net mounting groove against the clamping force of the speaker net, the speaker net can be easily removed from the main body of the device.

Further, if the mounting means has a net mounting groove provided in the device main body and an elastic fixing member which fits into the net groove by fitting the peripheral edge of the speaker net, By fitting the elastic fixing member to the peripheral edge of the speaker net and elastically pressing the elastic fixing member together with the peripheral edge of the speaker net into the net mounting groove of the device main body in this state, the speaker net can be attached to the device main body. Also, the speaker net can be detached from the device body by extracting the peripheral edge of the speaker net from the inside of the net mounting groove against the elastic pressing force of the elastic fixing member. In this case, if a convex portion that bites into the elastic fixing member is provided on the inner surface of the net mounting groove, the convex portion elastically bites into the elastic fixing member when the elastic fixing member is pressed into the net mounting groove. Therefore, the elastic fixing member can be reliably fixed in the net mounting groove, and a highly sealed one can be obtained.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view of a main part showing a first embodiment in which a speaker structure of the present invention is applied to an electronic musical instrument.

FIG. 2 is a plan view of a main part showing a state where an upper case is removed in FIG. 1;

FIG. 3 is an enlarged sectional view of a main part of FIG. 1;

FIG. 4 is an enlarged sectional view of a main part showing a second embodiment in which the speaker structure of the present invention is applied to an electronic musical instrument.

FIG. 5 is an enlarged plan view of a main part showing a third embodiment in which the speaker structure of the present invention is applied to an electronic musical instrument.

FIGS. 6A and 6B show cross sections of FIG. 5, wherein FIG. 6A is a cross sectional view taken along line AA of FIG. 5, and FIG. 6B is a cross sectional view taken along line BB of FIG.

FIG. 7 is an enlarged cross-sectional view of a main part of a fourth embodiment in which the speaker structure of the invention is applied to an electronic musical instrument.

8 is a sectional view of a state where FIG. 7 is assembled.

FIG. 9 is an enlarged plan view of a main part showing a fifth embodiment in which the speaker structure of the present invention is applied to an electronic musical instrument.

FIG. 10 is an enlarged sectional view taken along the line CC of FIG. 9;

FIG. 11 is an exploded cross-sectional view of a main part in which a conventional speaker structure is applied to an electronic musical instrument.

FIG. 12 is an enlarged sectional view of a main part showing a mounting structure of the speaker net in the conventional example of FIG. 11;

[Explanation of symbols]

 1, 61 Musical instrument main body 2, 62, 63 Speaker 3 Upper case 4 Lower case 7 Sound emission hole 14 Speaker net 16 Peripheral edge of speaker net 20 Mounting boss 21 Hollow boss 22 Temporary fixing part 24 Screw 27 Positioning guide part 30, 40, 51 Net mounting groove 31 Locking hole 32 Engagement hook 34 Fixing screw 35 Holding plate 41, 42 Clamping rib 50 Elastic fixing member 53 Convex part of net mounting groove 54 Net fitting concave part 60 Speaker part 65, 66 Partition part 67 Base 67a Support wall 68 Lower rib

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Shinichi 3-2-1, Sakaemachi, Hamura-shi, Tokyo Casio Computer Co., Ltd. Hamura Technical Center F-term (reference) 5D017 AF01 AF08 AG02 AG02 AG07 AG17

Claims (8)

[Claims] A first attachment having a device main body composed of a pair of cases, a speaker arranged in the device main body, and a temporary fixing portion provided in one case of the device main body and temporarily fixing the speaker. Part, a second mounting part corresponding to the first mounting part via the speaker provided on the other case of the device main body and temporarily fixed by the temporary fixing part, the first mounting part and the second mounting part. 2 With the speaker temporarily fixed by the temporary fixing portion sandwiched between the mounting portion and the
A speaker structure, comprising: a fixing member for fixing the speaker by fastening the mounting portion and the second mounting portion. 2. The other case is provided with a positioning guide portion for guiding the speaker temporarily fixed to the temporary fixing portion of the one case to a predetermined position. The speaker structure as described. 3. A pair of partitions surrounding the speaker are formed on opposite surfaces of the pair of cases so as to face each other, and at least one of the partitions is formed by a tip of a pair of support walls. The speaker structure according to claim 1, comprising a hollow pedestal portion formed by connecting the pedestal and a rib formed at an end of the pedestal portion. 4. A device body provided with a sound emitting hole, a speaker provided in the device body corresponding to the sound emitting hole,
A speaker structure comprising: a speaker net that covers the sound emission hole of the device main body; and mounting means for detachably attaching a peripheral portion of the speaker net to the device main body. 5. The mounting means is provided with a locking hole provided in the main body of the device located near the periphery of the sound emission hole, and inserted into the locking hole provided in a periphery of the speaker net. The speaker structure according to claim 4, further comprising: an engaging portion that is detachably engaged; and a screw member that fixes the engaging portion to the device main body. 6. The mounting means is provided in the main body of the device, and has a net mounting groove into which a peripheral portion of the speaker net is inserted, and a peripheral portion of the speaker net formed alternately on an opposing surface in the net mounting groove. The speaker structure according to claim 4, further comprising a holding portion for holding the portion. 7. The mounting means includes a net mounting groove provided in the device main body, and an elastic fixing member which fits a peripheral edge of the speaker net and elastically presses into the net groove. The speaker structure according to claim 4, wherein: 8. The loudspeaker structure according to claim 7, wherein a convex portion which bites into said elastic fixing member is provided on an inner surface of said net mounting groove.