JP2003263165A - Attachment device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily attach/detach an attachment device to/from an electronic instrument body and to optionally change the direction of the attachment device when attached. <P>SOLUTION: A mount 30 is fixed to the upper surface of an electronic musical instrument 1 to be the electronic instrument body and an attaching tool 40 is fixed to the lower surface of a loudspeaker unit 2 which is an attachment device. A fitting protrusion formed on the mount 30 is fitted with a fitting recess formed on the attaching tool 40, the direction of the loudspeaker unit 2 is adjusted in a state that an operation lever 43 for locking the fitting is turned up to a way to a lock position, and then the lever 43 is turned to the lock position, so that the fitting of the protrusion and the recess is locked and the mount and the attaching tool 40 are mutually fixed to fix the loudspeaker unit 2 on the electronic musical instrument 1. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment device for attaching an accessory device (optional device) such as a speaker unit to a main body of an electronic device such as an electronic keyboard instrument.

[0002]

2. Description of the Related Art In some cases, it may be desired to attach an accessory device to an electronic equipment main body for use. For example, there is a case where it is desired to attach a pair of speaker units to an electronic musical instrument such as a portable electronic keyboard musical instrument and perform the performance. Conventional electronic musical instruments generally have a built-in speaker, so you can play with just that.However, professional instruments do not have a built-in speaker, but you can install a large speaker separately and connect it to play. ing. However, when practicing or in small concerts,
It would be convenient if a small speaker could be attached to the body of the electronic musical instrument to play.

[0003]

However, there is no conventional electronic musical instrument in which an accessory device such as a speaker unit can be easily attached and detached. For various other electronic devices (for example, personal computers, televisions, compact stereos, VCRs, cassette recorders with radios, CD players, electronic game machines, etc.), if an accessory device (optional device) is desired to be connected and used. , It is common to secure a space to install it and use its attached device by connecting it with a connection cord.It is difficult to secure the installation space, and it takes time to prepare for use. There was a problem that the connection cord might get in the way or come off.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an attachment device for easily attaching and detaching an accessory device to an electronic equipment body. Further, the attachment device may be attached to the main body of the electronic device so that its orientation can be arbitrarily changed, or a connection cord for electrically connecting the attachment device and the main body of the electronic device, the attachment device or It is also an object of the present invention to allow a cable, a power cord, or the like for connecting an electronic device body and another electronic device to be easily stored or protected.

[0005]

In order to achieve the above object, the present invention comprises a mounting base fixed to an electronic equipment main body and a mounting tool fixed to an auxiliary equipment. Provided is an attachment device for mounting. The attachment device is provided with a fitting concave portion on one of the mounting base and the mounting tool, and a fitting convex portion on the other side, and a fitting locking operation member is provided on either the mounting base or the mounting tool. When the operating member is operated (operated) to the unlocked position, the fitting convex portion can be fitted and rotated in the fitting concave portion from the disengaged state, and the fitting convex portion becomes the fitting concave portion. At least one of the side surfaces of the fitting convex portion and the fitting concave portion is configured so that the fitting convex portion cannot be separated from the fitting concave portion when the operating member is operated (operated) to the lock position in the fitted state. It is characterized in that the part has a retaining shape.

The fitting / locking operation member is an operation lever, a lock operation screw, a push knob, or the like, and it is preferable that this member is provided so as to face the side surface or the back surface of the electronic apparatus main body. The fitting recess is provided on the mounting tool, the fitting projection is provided on the mounting base, and the operating member of the lock mechanism is provided on the mounting tool, or the fitting recess is mounted on the mounting base.
The fitting protrusions may be provided on the respective fittings, and the operating member of the lock mechanism may be provided on the mounting base. It is preferable that at least a part of one side surface of each of the fitting convex portion and the fitting concave portion is formed into a tapered surface that prevents the other from coming off to have the above-mentioned retaining shape. An opening for die cutting may be formed in the member having the tapered surface. If at least one of the side surfaces of the fitting convex portion and the fitting concave portion is formed into a conical surface, the fitting convex portion and the fitting concave portion can easily rotate relative to each other. The surface of the operating member (lever) facing the tapered surface may also be formed as a tapered surface inclined in the opposite direction to the tapered surface.

Further, according to the present invention, a lock mechanism is provided for fixing the mounting base and the mounting tool in a state where the mounting base and the mounting tool are aligned with each other, and a connection cord is held on at least one of the mounting base and the mounting tool. There is also provided an attachment device provided with a grip portion. In a state in which the grip portion is attached to the electronic device body, the surface (inside surface) facing the electronic device body is a concave surface, and the opposite surface (outer surface) is a convex surface. Then, it is possible to wind the connection cord for easy accommodation and to prevent the back wall surface from being damaged.

The connection cord is a cord for electrically connecting the accessory device to the electronic equipment main body or another electronic equipment, or a cable such as a power cord of the electronic equipment main body or a MIDI code. The above-mentioned gripping portion also functions as a protector so as not to be pressed against the opposing wall when the device is connected and used. Further, when the electronic device is not used, the holding part functions as a storage part for winding and storing the connection cord.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the embodiment to be described below, the case where the accessory device attached to the portable electronic keyboard musical instrument (hereinafter referred to as "electronic musical instrument") is a speaker unit will be described. However, the attachment device according to the present invention can be used in various electronic devices other than this. It can also be used to attach ancillary equipment.

First, an outline of a usage example of the attachment device according to the present invention will be described with reference to FIGS. FIG. 1 is a side view showing a state in which speaker units are attached to an electronic musical instrument using the attachment device according to the embodiment of the present invention, and FIG. 2 is a pair of speaker units near both ends of the upper surface of the electronic musical instrument. It is a schematic perspective view which shows the state which attached. FIG. 3 is a schematic plan view showing a stored state in which only a pair of mounting bases are fixed to the electronic musical instrument and the connection cord is wound around the holding portion.

In FIG. 1, the electronic musical instrument 1 has its outer case fitted with a resin upper case 11 and a resin lower case 12, and is fixed integrally by screwing a set screw into a boss described later. . A keyboard portion 13 is provided on the front side of the upper case 11, and an operation panel portion and a display device are provided on the upper surface 11a. In addition, in the vicinity of the corner from the rear end of the upper surface 11a of the upper case 11 to the rear surface 11b, in the vicinity of both sides in the key arrangement direction shown in FIG. 2 and FIG.
Mounting base 3 for a pair of attachment devices 3 according to the present invention
It is configured to fix 0 respectively. The fixing means will be described later.

The mounting base 30 is provided with a circular pedestal 31, a mounting portion 33 and a grip portion 34, and as shown in FIG.
An inverted frustoconical fitting protrusion 32 is provided so as to project concentrically from the upper surface of the fitting protrusion 1. The details will be described later. The grip portion 34 is a column portion 34 that projects rearward in a substantially horizontal direction from the mounting portion 33 along the back surface 11b of the upper case 11.
a, and a pair of gripping pieces 34b, 34b which are integrally provided on both sides thereof and extend substantially vertically. On the other hand, each of the pair of speaker units 2, which is an accessory device, has a plurality of speakers built in a resin-made box 21, and a front surface is a speaker grill 22. On the lower surface 21a of the box 21 of each speaker unit 2, the mounting tool 4 of the attachment device 3 according to the present invention is attached.
0 is stuck. The fixing means will be described later.

The mounting device 40 is provided with a circular cap type base body 41 and an operating lever 43, which is an operating member for fitting lock and protrudes from the opening 41a to the outside, so as to be rotatable with respect to the base body 41. In addition, a fitting recess 42 described later with reference to FIG. 4 and the like is formed inside the base 41. The fitting convex portion 32 (FIG. 3) of the mounting base 30 of the attachment device 3 is fitted in the base body 41 as shown in FIG.
, And the mounting table 30 and the mounting tool 40 are aligned on the mating surface (the upper surface of the mounting table 30 and the lower surface of the mounting tool 40).
FIG. 1 shows a state in which the operation lever 43 is pivoted to the lock position and locked.

From this state, when the operation lever 43 is rotated in the unlocking direction, the mounting base 30 and the mounting tool 40 are unlocked from the fitting convex portion and the fitting concave portion, and are relatively rotatable. As shown in FIG. 2, the speaker unit 2 can be freely rotated in the directions of arrows A and B with respect to the electronic musical instrument 1. Therefore, depending on the application, when the performer practices, the speaker grill 22 is placed on the performer side (keyboard part 1
The direction of each speaker unit 2 can be arbitrarily changed, for example, by directing the speaker grill 22 toward the audience when performing in a venue where the audience is present. Then, when the operation lever 43 is rotated to the lock position at that position, the speaker unit 2 is fixed so as not to be rotated and detachable. Further, when each speaker unit 2 is in a rotatable unlocked state, it can be easily removed from the electronic musical instrument 1 by slightly sliding the speaker unit 2 toward the operation lever 43 and lifting it.

FIG. 3 shows a mounting base 3 of the attachment device 3.
The usage example of the grip part 34 provided in 0 is shown. When the mounting base 30 is mounted on the electronic musical instrument 1, the grip portion 34 is used as a handle (handle) for an operator to hold the mounting base 30 and press the mounting base 30. The electronic musical instrument 1 is used as a member for holding or storing the connection cord 5 when the electronic musical instrument 1 is in use or is not used (when stored). The connection cord 5 is a speaker unit 2 which is an accessory device.
Is a cord for electrically connecting the electronic musical instrument 1 which is the main body of the electronic device or another electronic device, or a power cord of the electronic musical instrument 1, a cable such as a MIDI cord, etc. When using the instrument 1,
Even if there is the opposing wall 6 behind, the pair of grips 34 also function as a protector for keeping the distance between the opposing wall 6 and the back surface 11b of the electronic musical instrument 1 so that the connecting cord 5 is not pressed against it.

Further, when the electronic musical instrument 1 is not used, the grip portion 34 functions as a storage portion for winding and storing the connection cord 5 by the support portion 34a and the grip piece 34b. Each gripping piece 34b of the gripping portion 34 is a surface (inner surface) on the side facing the electronic musical instrument 1 when the mounting base 30 is mounted on the electronic musical instrument 1 as shown in FIG.
34c is a concave surface, and the opposite surface (outer surface) 34d is formed in a convex shape, so that the connection cord 5 can be wound and stored easily, and the back wall surface is not damaged. You can The connection cords may be individually hooked or wound around the pair of gripping portions 34, 34 protruding to the rear surface of the electronic musical instrument 1 to be held or stored. Alternatively, as shown in FIG. , 34, the long connecting cord 5 can be spanned or wound to be held or stored.

Next, the structure and mounting state of the attachment device described above will be described in detail with reference to FIGS. 4 to 7 and 10. FIG. 4 shows a mounting base 30 of the attachment device 3.
FIG. 3 is a rear view showing a state in which the mounting instrument 40 is fixed to the electronic musical instrument 1 and the mounting unit 40 is fixed to the speaker unit 2 in a sectional view of only the mounting unit 40 side. FIG. 5 shows a mounting base 30 along the line C-C in FIG.
6 is an enlarged cross-sectional view excluding the grip portion 34, FIG. 6 is a bottom view of the speaker unit 2 to which the mounting tool 40 is fixed, and FIG. 7 is a state in which the speaker unit 2 is attached to the electronic musical instrument 1 and locked from the state shown in FIG. FIG. 7 is a rear view showing only the wearing tool 40 as a cross section taken along the line dd of FIG. 6.

The mounting base 30 shown in FIG. 4 is provided with a circular pedestal 31, a mounting portion 33 and a gripping portion 34 as shown in FIG.
An inverted frustoconical fitting protrusion 32 is provided so as to concentrically project from the upper surface of the circular pedestal 31. The circular pedestal 31 is formed in the shape of an inverted frustoconical dish as shown in the cross section of FIG. A step portion 31a serving as a spacer is formed, and a mounting portion 33 extending downward and a reinforcing portion 31b thereof are integrally formed on the back side.

Inside the circular pedestal 31, a boss portion 31c is provided at the center, a cylindrical fitting convex portion support portion 31d is provided around the boss portion, and an annular rib 31e and a large number of radial ribs 31f are provided outside the boss portion 31c. It is provided. Further, a positioning protrusion 31g extending downward is provided at the center of the bottom surface. The protrusion 31g is fitted in a groove 11g and a hole 11e of FIG. 10 described later. A groove portion 33a having a depth equal to or higher than the height of the head of the screw for fixing the grip portion 34 is provided on the surface of the mounting portion 33 that comes into contact with the back surface of the electronic musical instrument 1, and a pair of mounting screws are provided at intervals in the longitudinal direction. Hole 33b for screw and hole 33c for screw for fixing the grip portion 34 to the intermediate portion thereof
And are provided. Each part of the circular pedestal 31 and the mounting part 33 are integrally molded with resin.

As shown in FIG. 5, the fitting protrusion 32 is also formed in the shape of an inverted frusto-conical plate, and the bottom of the fitting protrusion 32 is recessed into a circle to form a fitting bottom 32a. It fits into the support portion 31d. At that time, the fitting convex portion support portion 31d
The protrusion provided on the outer periphery of the a is fitted into the groove b formed on the inner periphery of the a-fitting bottom portion 32a to prevent rotation. An annular rib 32b and a radial rib 32c are also formed in the fitting convex portion 32. Then, the fitting bottom portion 32a of the fitting convex portion 32
A screw 35 for mounting the fitting convex portion is inserted into a hole formed in the center of the screw and screwed into a screw hole of the boss portion 31c of the circular pedestal 31, so that the fitting convex portion 32 cannot be relatively rotated on the circular pedestal 31. Stick to.

As shown in FIG. 4 and the above-described FIGS. 1 and 3, the grip portion 34 of the mounting base 30 is a column that projects substantially horizontally from the mounting portion 33 along the back surface of the electronic musical instrument 1. The portion 34a and a pair of gripping pieces 34b, 34b that are integrally provided on both sides of the tip portion and extend substantially vertically.
Consists of. This grip portion 34, as shown in FIG.
The screw 36 is screwed into the column portion 34a through the hole 33c (FIG. 5) of the mounting portion 33 and fixed to the mounting portion 33. Similarly, as shown in FIG. 10, the positioning protrusions 31g on the lower surface of the circular pedestal 31 are fitted into the positioning holes 11c formed on the upper surface 11a of the upper case 11 of the electronic musical instrument 1, and the step portion 31a is positioned on the upper surface. 11a to abut the mounting portion 33
To the rear surface 11b of the upper case 11 and attach the mounting screws 3 to the mounting screw holes 33b and 33b (FIG. 5), respectively.
7, 37 are inserted and screwed into the screw holes on the back surface 11b of the upper case 11 to fix the mounting base 30 to the electronic musical instrument 1.

On the other hand, as shown in FIGS. 4 and 6, the mounting tool 40 has an opening 41a formed at one side of a circular cap type base body 41, and a pair of inner surfaces facing each other at an equal distance from the center. Of the parallel rib walls 41b and 41b and the inclined wall 41c provided between the ends farther from the opening 41a form the fitting concave portion 42 into which the fitting convex portion 32 of the mounting base 30 is fitted. is doing. The distance Da (FIG. 6) between the facing surfaces of the pair of rib walls 41b, 41b forming the fitting concave portion 42 is slightly wider than the maximum outer diameter Db (FIG. 5) of the fitting convex portion 32 of the mounting base 30, and Da≈Db. Inclined wall 4
The inner side surface of 1c forms a tapered surface 41d (FIG. 4) in the same direction as the outer peripheral surface of the fitting convex portion 32 and has a retaining shape. The taper surface 41d has a rubber piece 4 for preventing slippage.
4 is pasted. Further, the inclined wall 41c serves as an undercut portion that cannot be die-cut when the base 41 is molded with resin. Therefore, the opening 41e for die cutting is formed larger than the portion corresponding to the inclined wall 41c on the upper surface of the base 41.

The base 41 is located outside the inclined wall 41c,
The bolt 45 and the nut 46 fix the speaker unit 2 to the lower surface 21 a of the box 21. In addition, the inner portion of the opening 41a also has a bearing portion 43a of the operating lever 43.
Along with the bolt 47 and the double nut 48, it is attached to the lower surface 21a of the box 21.
3 is mounted rotatably in the direction of the arrow between the unlocked position and the locked position shown in FIG. A surface of the inner end portion of the operation lever 43, which engages with the outer peripheral surface of the fitting convex portion 32 of the mounting base 30 described above, has an arc shape concentric with the rotation center of the operation lever 43 and is opposite to the tapered surface 41d. Taper surface 43 inclined to
It is b. The operating portion of the operating lever 43 is the base 4
Although it protrudes to the outside from the opening 41a of No. 1, it is bent in a V shape so as not to protrude greatly and is easy to operate (in FIG. 4, it is simplified and shown straight and short). A groove for preventing slippage is formed in the vertical direction on the tip surface 43c.

The sloped wall 41 to which the inverted convex truncated cone-shaped fitting convex portion 32 and the rubber piece 44 constituting the fitting concave portion 42 are attached.
The c and the operating lever 43 constitute a lock mechanism. Then, as shown in FIG. 6, when the operation lever 43 is rotated to the unlocked position, the minimum distance between the taper surface 41d of the inclined wall 41c forming the fitting recess 42 and the taper surface 43b of the operation lever 43 (lowermost part) Is the mounting base 3
It is wider than the maximum outer diameter of the fitting protrusion 32 of 0. In this state, the speaker unit 2 is held vertically with the lower surface 21a facing down, and the mounting tool 40 is aligned with its center position with respect to the mounting base 30 fixed to the electronic musical instrument 1 as shown in FIG. When lowered, the fitting convex portion 32 of the mounting base 30 is attached to the mounting tool 4
It can be fitted into the zero fitting recess 42.

When the operation lever 43 is rotated to the lock position shown in FIG. 6, the tapered surface 41 of the inclined wall 41c is rotated.
The distance between d and the tapered surface 43b of the operating lever 43 becomes substantially the same as the outer diameter of the fitting convex portion 32 of the mounting base 30 in the entire area in the height direction, and the rubber piece 44 is compressed, so that its elastic force is increased. Strongly locked and locked by. FIG. 7 shows the state. The fitting protrusion 32 of the mount 30 is fitted into the fitting recess 42 of the fitting 40, and the mating surface 30a of the fitting 30 and the mating surface 40a of the fitting 40 shown in FIG. When the lever 43 is turned partway in the locking direction, the minimum distance between the tapered surface 41d and the tapered surface 43b becomes narrower than the maximum outer shape of the fitting convex portion 32, and the taper surface of the outer periphery of the fitting convex portion 32 becomes smaller. Is prevented from falling out. That is, the inclined wall 41c of the mounting tool 40 and the tapered surface 43b of the operation lever 43 prevent the fitting protrusion 32 of the mounting base 30 from coming off.

Therefore, although the speaker unit 2 cannot be detached from the electronic musical instrument 1, the speaker unit 2 can be freely rotated to change its direction as shown by arrows A and B in FIG.
Therefore, after each speaker unit 2 is oriented in a desired direction, the operation lever 43 is completely rotated to the lock position, whereby each speaker unit 2 can be fixed at that position. Further, from that state, if the operation lever 43 is turned in the unlocking direction partway, the speaker unit 2 can be turned to change its direction, and if it is completely turned to the unlocked position, Speaker unit 2
It can also be easily removed from the electronic musical instrument 1 by slightly sliding the knob toward the operation lever 43 and lifting it.

Next, the joint structure of the upper case 11 and the lower case 12 of the electronic musical instrument 1 used in this embodiment, the shrinkage preventing groove thereof and the method of using the same will be described with reference to FIGS. 8 to 11. FIG. 8 is an enlarged cross-sectional view showing a portion where the boss and the reinforcing rib are formed in the upper and lower cases of the electronic musical instrument 1 (however, the upper and lower parts of the boss have different sectional positions), and FIG. It is a bottom view which shows only a part of boss and the rib for reinforcement formed inside. FIG. 10 is a sectional view similar to FIG. 8 showing a state in which mounting bases are fixed to the upper and rear corners of the upper case 11 of the electronic musical instrument 1, and FIG. FIG.

The outer case of this electronic musical instrument 1 is the upper case 1.
1 and the lower case 12, and as shown in FIGS. 8 to 10, a taper for connecting the lower case is provided inside a position near the rear surface 11b of the upper panel portion 11A forming the upper surface 11a of the upper case 11. A cylindrical boss 11d is provided so as to hang downward. The plurality of bosses 11d are provided at intervals in the width direction of the upper case 11 (direction perpendicular to the paper surface in FIG. 8), and are arranged between the upper part and the upper panel part 11A in a direction parallel to the back surface 11b. Four reinforcing ribs 11e are integrally formed in the orthogonal direction. Each boss 1
A screw hole 11f is formed in the lower portion of 1d from the lower end surface. Further, each boss 11d is provided inside the high step portion 12a near the rear end of the lower case 12 fitted to the lower side of the upper case 11.
A flange portion 12b having a through hole 12c is integrally formed at a position facing each other. The upper case 11 and the lower case 12 are fitted to each other as shown in FIG.
11d of the boss 11d and the flange portion 12b of the lower case 12 are brought into contact with each other, and the mounting screw 15 is attached to the boss 11d through the through hole 12c.
The upper case 11 and the lower case 12 are joined by screwing into the screw holes 11f.

In such an exterior case structure, when the boss 11d and its reinforcing rib 11e are integrally molded with the upper case 11 by resin, a recess due to the shrinkage is formed on the upper surface 11a at a position opposite to the boss 11d and the rib 11e. . Therefore, in order to prevent the occurrence of dents due to this shrinkage,
A groove 11g for preventing shrinkage is provided along the arrangement direction on the upper surface 11a outside the position where the plurality of bosses 11d of the upper case 11 and each rib 11e along the arrangement direction are provided. If the width of the shrinkage preventing groove 11g is D1, it is desirable that the relationship between the diameter D2 of the upper end of the boss 11d and the thickness D3 of the rib 11e satisfy D2> D1 and D3 <D1. By thus providing the groove from the beginning, it is possible to make the shrinkage not occur or to make it inconspicuous even if it occurs.

Further, in this embodiment, as shown in FIG. 10 and FIG. 11, the positioning protrusion 31g provided on the lower surface of the mounting base 30 is provided in the shrinkage preventing groove 11g.
Is formed with a positioning hole 11c. Then, the grip portion 34 of the mounting base 30 is gripped, and the positioning protrusion 31g provided on the lower surface of the grip portion 34 is attached to the upper case 1 of the electronic musical instrument 1.
The rear surface 11b of the upper case 11 adjacent to the upper surface 11a of the upper case 11 is fitted with the positioning hole 11c formed in the groove 11g for preventing shrinkage of the upper surface 11a of the upper case 11 for positioning.
Then, as shown in FIG. 10, the mounting portion 33 can be fixed to the electronic musical instrument 1 by connecting the mounting portion 33 to the rear surface 11b of the electronic musical instrument 1 with the mounting screws 37, 37 as shown in FIG. The mounting tool 4 fixed to the lower surface of the speaker unit 2 is attached to the mounting base 30.
When 0 is fitted and locked, the speaker unit 2 which is an accessory device to the electronic musical instrument 1 can be fixed to the electronic musical instrument 1.

FIG. 11 is a perspective view showing an external appearance example of the electronic musical instrument 1. A keyboard portion 13 is provided on the front side of the upper case 11, and an operation portion panel portion 16 and a display device 17 such as an LCD 17 are provided on the upper surface 11a. Etc. are provided, and the space around the left and right ends is a mounting space for the speaker unit. A groove 11g for preventing shrinkage is formed in the vicinity of the rear edge of the upper surface 11a of the upper case 11 over substantially the entire length in the longitudinal direction thereof, and the groove for preventing shrinkage corresponds to the speaker unit mounting position. A positioning hole 11c is formed in 11g.

Furthermore, a pair of music stand supporting holes 11h, 11h, near the central portion in the longitudinal direction in the groove 11g for preventing shrinkage,
11h is formed. Then, a ridge extending in the longitudinal direction and a pair of protrusions are formed on the lower surface of a plate-shaped music stand (not shown), and the ridge is fitted into the groove 11g for preventing shrinkage,
By fitting the pair of protrusions into the holes 11h, 11h for supporting the music stand, the music stand can be easily mounted when necessary. Instead of these holes 11c and 11h, recesses deeper than the groove 11g for preventing shrinkage may be provided. Alternatively, if longitudinal positioning is not required,
The groove 11g for preventing shrinkage can be used as follows. That is, the groove for preventing the shrinkage is directly attached to the above-mentioned mounting base and various accessory devices (lighting equipment, music stand, computer display, speaker, external HDD, sub electronic keyboard instrument, writing or composition desk, etc.). By providing a protrusion or a protrusion that fits in 11g, the protrusion or the protrusion is fitted into the groove 11g for preventing shrinkage, and the accessory device is temporarily supported, and is coupled to the back surface or the like as necessary. It is possible to fix the connection part to the main body of the electronic device such as the electronic musical instrument 1 by screwing the connection part.

Next, various modifications of the attachment device according to the present invention will be described. The attachment device according to the present invention is not limited to the above-described embodiment, and various modifications can be made. The applicable device is not limited to an electronic musical instrument, and various accessory devices can be easily attached to and detached from various electronic device bodies. It can be used to attach to be freely changeable. In the above-described embodiment, the fitting convex portion is provided on the mounting base and the fitting concave portion is provided on the mounting tool, but by reversing this,
The mounting base may be provided with a fitting concave portion, and the mounting tool may be provided with a fitting convex portion. Also, the operation lever may be provided on the mounting base side. The fitting lock operating member is not limited to one that rotates like an operating lever that has a lever function or an operating screw that locks by screwing, but that that operates directly such as a push knob or push rod (pushing in). It is also possible to provide such a device that is locked by, and unlocked by pushing or pulling again). It is preferable that these operation members are provided so as to face the side surface or the back surface of the electronic device main body in a normal mounting state to the electronic device main body.

Although the shape for preventing the fitting convex portion and the fitting concave portion from slipping off has been described as an example in which the fitting convex portion and the fitting concave portion are formed on the tapered surface which is inclined in the direction in which the fitting convex portion and the fitting concave portion are prevented from coming off, the present invention is not limited thereto. It may be an uneven shape or a step shape in which the recesses are inserted into each other in a direction orthogonal to the fitting and disengaging directions. However, if at least one of the side surfaces of the fitting convex portion and the fitting concave portion is formed into a conical surface, it becomes easy to relatively rotate the fitting convex portion and the fitting concave portion in a fitted state. The grip portion may be provided not only on the mounting base side but also on the mounting tool side, or on both the mounting base side and the mounting tool side. The shape is not limited to the one shown in the above-described embodiment, and various connection cords as described above can be held or stored, and the space between the electronic device body and the back wall surface is maintained, Any shape can be used as long as it can protect the connection cord.

Further, when a boss and / or a reinforcing rib for coupling the upper case and the lower case, which are molded from resin of the electronic equipment body, are provided inside the upper case, a shrinkage preventing groove is provided on the outside thereof to prevent the shrinkage. By providing a hole or a recess into which the protrusion or the protrusion provided on the attachment base of the attachment device is fitted, it is possible to prevent the occurrence of shrinkage and make it inconspicuous even if it occurs, and use it to make an attachment. The device can be easily positioned. Further, by using the shrinkage prevention groove, it is possible to easily support or temporarily lock various accessory devices as described above to the electronic apparatus main body and to attach them.

[0036]

As described above, when the attachment device according to the present invention is used, the attachment device can be easily attached to and detached from the electronic equipment main body, and the attachment device is attached to the electronic equipment main body. The direction can be changed arbitrarily. Alternatively, by providing the attachment device with a grip portion protruding rearward,
It is also possible to easily store or protect the connection cord for electrically connecting the accessory device and the electronic device main body, the cable or the power cord connecting the accessory device or the electronic device main body to another electronic device. .

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a speaker unit is attached to an electronic musical instrument using the attachment device according to the embodiment of the present invention.

FIG. 2 is a schematic perspective view of an electronic musical instrument in which a pair of speaker units are attached near both ends of the upper surface.

FIG. 3 is a schematic plan view showing a housed state in which only a pair of mounting bases are fixed to the electronic musical instrument and the connection cord is wound around the grip portion.

FIG. 4 is a rear view showing a state in which the mounting base of the attachment device according to the present invention is fixed to an electronic musical instrument and the mounting device is fixed to the speaker unit, with only the mounting device side being a cross section taken along line d-d of FIG.

5 is an enlarged cross-sectional view taken along the line C-C of FIG. 4 excluding a grip portion of the mounting base.

6 is a bottom view of the speaker unit to which the wearing tool shown in FIG. 4 is fixed.

7 is a state in which the speaker unit is attached to the electronic musical instrument and locked from the state shown in FIG.
It is a rear view shown as a section taken along the line -d.

FIG. 8 is a cross-sectional view showing, in an enlarged manner, a portion in which a boss and a reinforcing rib are formed in the upper and lower cases of the electronic musical instrument.

FIG. 9 is a bottom view showing only a part of a boss and a reinforcing rib formed in the upper case.

FIG. 10 is a sectional view similar to FIG. 8, showing a state in which mounting bases are fixed to the upper and rear corners of the upper case of the electronic musical instrument.

FIG. 11 is a perspective view showing an example of an electronic musical instrument in which an anti-shrinkage groove is formed near the rear edge of the upper surface, with a part cut away.

[Explanation of symbols]

1 ... Electronic musical instrument (electronic device body) such as portable keyboard,
2 ... Speaker unit (attached device), 3 ... Attachment device, 5 ... Connection cord, 6 ... Opposite wall, 11 ... Upper case, 11a ... Top surface, 11b ... Back surface, 11c ... Positioning hole, 11d ... For lower case connection Boss, 11e ... Reinforcing rib, 11f ... Screw hole, 11g ... Shrinkage preventing groove, 11
h ... hole for supporting music stand, 12 ... lower case, 12a ... high step part, 12b ... flange part, 12c ... through hole, 13 ... keyboard part, 15 ... mounting screw, 21 ... box, 22 ... speaker grill, 30 ... Mounting base 31, 31 ... Circular pedestal, 31a ... Step portion, 31b ... Reinforcing portion, 31c ... Boss portion, 31d ... Fitting convex portion supporting portion, 31e ... Annular rib, 31f ... Radial rib, 3
1g ... Positioning protrusion, 32 ... Fitting convex part, 32a ... Fitting bottom part, 32b ... Annular rib, 32c ... Radial rib, 33 ...
Mounting portion, 34 ... Gripping portion, 34a ... Strut portion, 34b ... Gripping piece, 34c ... Inner surface, 34d ... Outer surface, 35, 3
6, 37 ... Screw, 40 ... Mounting tool, 41 ... Circular cap type base, 41a ... Opening part, 41c ... Inclined wall, 41d ... Tapered surface, 41e ... Die-cutting opening, 42 ... Fitting concave part, 4
3 ... Operation lever (operation member), 44 ... Rubber piece, 45, 4
7 ... Bolt, 46 ... Nut, 48 ... Double nut,

Claims (2)

[Claims] 1. An attachment device for attaching the accessory device to the electronic device body, comprising an attachment base fixed to the electronic device body and a mounting fixture fixed to the accessory device. The fitting recess is provided on one of the fittings, and the fitting projection is provided on the other, and a fitting lock operating member is provided on either the mount or the fitting, and the operating member is unlocked. When operated to the position, the fitting convex portion can be fitted and rotated into the fitting concave portion from the disengaged state, and the operating member is locked with the fitting convex portion fitted in the fitting concave portion. The attachment device is characterized in that at least a part of the side surfaces of the fitting convex portion and the fitting concave portion are formed in a retaining shape so that the fitting convex portion cannot be separated from the fitting concave portion when actuated to the position. . 2. An attachment device for mounting the accessory device to the electronic device body, comprising an attachment base fixed to the electronic device body and a mounting tool fixed to the accessory device. An attachment characterized in that a lock mechanism is provided for fixing the fitting tool in a state of being matched with each other on a mating surface, and a grip portion for holding a connection cord is provided on at least one of the mounting base and the fitting tool. apparatus.