JP2017173697A - Attachment structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment structure which can prevent accidental separations of components from each other.SOLUTION: An attachment structure includes a first member and a second member, the first member having an attachment part with a flexible part and with a hanging part at one end of the flexible part and the second member having an opening with a first opening region and a second opening region, the first opening region being large enough for passage of the hanging part and the second opening region not being large enough for passage of the hanging part when they are viewed from above. The second opening region has a first side in common with the first opening region and has a second side obliquely opposed to the first side.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a mounting structure that couples parts by utilizing elasticity of a material. In particular, the present invention relates to a key mounting structure of a keyboard device.

  Conventionally, a simple mounting structure using the elasticity of a material is known as a method for joining parts together. Such a mounting structure is generally called a snap fit, and is used when a combination of molded parts such as plastic is combined.

  The above-described mounting structure is required to have the ability of being easily fixed to each other and being fixed so as not to be easily removed once the components are connected. As an attachment structure considering such performance, for example, a technique described in Patent Document 1 is disclosed.

Japanese Utility Model Publication No. 1-176987

  However, since the technique described in Patent Document 1 does not consider the variation in the component dimensions, the components are unintentionally separated due to the variation in the component dimensions, and it is difficult to attach the components to each other. It may become.

  Further, as a design that takes into account variations in component dimensions, it is conceivable to provide a certain margin in the claw portion of the snap fit to absorb the variations in component dimensions. However, since the rattling of the components occurs when the margin is provided, the components may be unintentionally separated.

  One of the objects of the present invention is to provide an attachment structure capable of preventing unintentional separation between components.

  The mounting structure according to an embodiment of the present invention includes a first member including a flexible portion and a mounting portion having a hook portion provided at one end of the flexible portion, and the hook portion passes when viewed from above. And a second member including an opening having a first opening area having a size that is possible and a second opening area having a size that prevents the hook portion from passing therethrough, and the second opening area includes the first opening area. And a second side provided obliquely facing the first side.

  In a state where the first member is attached to the second member, it is preferable that the attachment portion is in contact with both the first side and the second side. In that case, it is preferable that the first side and the second side are in contact with the mounting portion so as to sandwich the mounting portion. Furthermore, it is preferable that the attachment portion contacts the second side at a corner on the rear side.

  The flexible portion may be less flexible in a direction orthogonal to the direction toward the first side than the flexibility in the direction toward the first side.

  An obtuse angle may be formed between the lower surface of the hanging portion and the surface of the flexible portion continuous to the lower surface.

  The mounting structure according to an embodiment of the present invention includes a first member including a flexible portion and a mounting portion having a hook portion provided at one end of the flexible portion, and the hook portion passes when viewed from above. And a second member including an opening having a first opening area of a possible size and a second opening area of a size through which the hook portion cannot pass, and the second opening area is provided on the second member. On the other hand, in a state where the first member is mounted, the side member has a side that works in a direction in which the amount of the hooking portion with respect to the second member increases.

  The one side of the second opening region is preferably arranged obliquely with respect to the other side facing the one side.

  It is preferable that the lower surface of the hooking portion works in a direction in which the hooking amount of the hooking portion with respect to the second member increases in a state where the first member is attached to the second member.

  According to the embodiment of the present invention, unintended separation between components can be prevented.

It is a figure which shows the structure of the keyboard apparatus of 1st Embodiment. It is a block diagram which shows the structure of the sound source device of 1st Embodiment. It is a figure which shows an example which looked at the structure inside the housing | casing of 1st Embodiment from the side. It is a figure which shows an example which looked at the structure of the structure containing the rod-shaped flexible part of 1st Embodiment from the side. It is a figure which shows an example which looked at the structure of the attachment structure of 1st Embodiment from diagonally upward. It is a figure which shows an example which looked at the structure of the 1st member in the attachment structure of 1st Embodiment from diagonally upward. It is a figure which shows an example which looked at the structure of the 1st member in the attachment structure of 1st Embodiment from the side. It is a figure which shows an example which looked at the structure of the hanging part in the attachment structure of 1st Embodiment from the side. It is a figure for demonstrating the effect | action of the hook part in the attachment structure of 1st Embodiment. It is a figure which shows an example which looked at the structure of the 2nd member in the attachment structure of 1st Embodiment from diagonally upward. It is a figure which shows an example which looked at the structure of the 2nd member in the attachment structure of 1st Embodiment from upper direction. It is a figure which shows an example which looked at the structure which cut | disconnected the 2nd member in the attachment structure of 1st Embodiment by A-A 'shown in FIG. It is a figure which shows an example which looked at the structure which cut | disconnected the 2nd member in the attachment structure of 1st Embodiment by B-B 'shown in FIG. It is a figure which shows an example which looked at the structure of the 2nd member in the attachment structure of 1st Embodiment from the back surface. It is a figure for demonstrating the upper end of the 1st opening part which the 2nd member in the attachment structure of 1st Embodiment has. It is a figure which shows the positional relationship of the 1st opening part which the 2nd member has in the attachment structure of 1st Embodiment, and the hook part which a 1st member has. It is a figure which shows the modification of the hook part in the attachment structure of 1st Embodiment. It is a figure which shows the modification of the main-body part in the attachment structure of 1st Embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments are examples of embodiments of the present invention, and the present invention should not be construed as being limited to these embodiments. Note that in the drawings referred to in the present embodiment, the same portion or a portion having a similar function is denoted by the same reference symbol or a similar reference symbol (a reference symbol simply including A, B, etc. after a number) and repeated. The description of may be omitted. In addition, the dimensional ratios of the drawings (the ratios between the components, the ratios in the vertical and horizontal height directions, etc.) may be different from the actual ratios for convenience of explanation, or some of the configurations may be omitted from the drawings.

<First Embodiment>
[Configuration of keyboard device]
FIG. 1 is a diagram illustrating a configuration of a keyboard device according to the first embodiment. In this example, the keyboard device 1 is an electronic keyboard instrument that emits sound in response to a user (player) key depression such as an electronic piano. Note that the keyboard device 1 may be a keyboard-type controller that outputs control data (for example, MIDI) for controlling an external sound source device in response to a key depression. In this case, the keyboard device 1 may not have a sound source device.

  The keyboard device 1 includes a keyboard assembly 10. The keyboard assembly 10 includes a white key 100w and a black key 100b. A plurality of white keys 100w and black keys 100b are arranged side by side. The number of keys 100 is N, which is 88 in this example. This arranged direction is called a scale direction. When the white key 100w and the black key 100b can be described without particular distinction, the key 100 may be referred to. Also in the following description, when “w” is added to the end of the reference sign, it means that the configuration corresponds to the white key. Further, when “b” is added at the end of the code, it means that the configuration corresponds to the black key.

  A part of the keyboard assembly 10 exists inside the housing 90. When the keyboard device 1 is viewed from above, a portion of the keyboard assembly 10 covered by the casing 90 is referred to as a non-appearance portion NV, and a portion exposed from the casing 90 and visible to the user is referred to as an appearance portion PV. . That is, the appearance part PV is a part of the key 100 and indicates an area where the user can perform a performance operation. Hereinafter, a portion of the key 100 that is exposed by the appearance portion PV may be referred to as a key body portion.

  Inside the casing 90, a sound source device 70 and a speaker 80 are arranged. The tone generator 70 generates a sound waveform signal when the key 100 is pressed. The speaker 80 outputs the sound waveform signal generated in the sound source device 70 to an external space. The keyboard device 1 may be provided with a slider for controlling the volume, a switch for switching timbres, a display for displaying various information, and the like.

  In the description of FIGS. 1 to 3, directions such as up, down, left, right, front, and back indicate directions when the keyboard device 1 is viewed from the performer when performing. Therefore, for example, the non-appearance part NV can be expressed as being located on the back side with respect to the appearance part PV. Further, the direction may be indicated with the key 100 as a reference, such as the key front end side and the key rear end side. In this case, the key front end side indicates the front side as viewed from the performer with respect to the key 100. The rear end side of the key indicates the back side viewed from the performer with respect to the key 100. According to this definition, the black key 100b can be expressed as a portion protruding upward from the white key 100w from the front end to the rear end of the key body of the black key 100b.

  FIG. 2 is a block diagram illustrating a configuration of the sound source device according to the first embodiment. The sound source device 70 includes a signal conversion unit 710, a sound source unit 730, and an output unit 750. The sensor 300 is provided corresponding to each key 100, detects a key operation, and outputs a signal corresponding to the detected content. In this example, the sensor 300 outputs a signal according to the key depression amount in three stages. The key pressing speed can be detected according to the interval of this signal.

  The signal conversion unit 710 acquires the output signal of the sensor 300 (sensors 300-1, 300-2,..., 300-88 corresponding to the 88 keys 100), and performs an operation according to the operation state of each key 100. Generate and output a signal. In this example, the operation signal is a MIDI signal. Therefore, the signal conversion unit 710 outputs note-on according to the key pressing operation. At this time, the key number indicating which of the 88 keys 100 has been operated and the velocity corresponding to the key pressing speed are also output in association with the note-on. On the other hand, in response to the key release operation, the signal conversion unit 710 outputs the key number and note-off in association with each other. A signal corresponding to another operation such as a pedal may be input to the signal conversion unit 710 and reflected in the operation signal.

  The sound source unit 730 generates a sound waveform signal based on the operation signal output from the signal conversion unit 710. The output unit 750 outputs the sound waveform signal generated by the sound source unit 730. This sound waveform signal is output to, for example, the speaker 80 or the sound waveform signal output terminal.

[Configuration of keyboard assembly]
FIG. 3 is an explanatory diagram when the configuration inside the housing in the first embodiment is viewed from the side. As shown in FIG. 3, the keyboard assembly 10 and the speaker 80 are arranged inside the housing 90. The speaker 80 is disposed on the back side of the keyboard assembly 10. The speaker 80 is arranged so as to output a sound corresponding to the key depression toward the upper side and the lower side of the housing 90. The sound output downward advances from the lower surface side of the housing 90 to the outside. On the other hand, the sound output upward passes through the space inside the keyboard assembly 10 from the inside of the housing 90, and is externally transmitted from the gap between the adjacent keys 100 in the exterior portion PV or the gap between the key 100 and the housing 90. Proceed to

  The configuration of the keyboard assembly 10 will be described with reference to FIG. The keyboard assembly 10 includes a connection portion 180, a hammer assembly 200, and a frame 500 in addition to the key 100 described above. The keyboard assembly 10 is a resin-made structure whose most configuration is manufactured by injection molding or the like. The frame 500 is fixed to the housing 90.

  The connection unit 180 connects the key 100 so as to be rotatable with respect to the frame 500. The connecting portion 180 includes a plate-like flexible portion 181, a key side support portion 183, and a rod-like flexible portion 185 a. The plate-like flexible part 181 extends from the rear end of the key 100. The key side support portion 183 extends from the rear end of the plate-like flexible portion 181. The rod-like flexible portion 185 a connects the key side support portion 183 and the frame side support portion 585 of the frame 500. In other words, the rod-shaped flexible portion 185 a is disposed between the key 100 and the frame 500. The key 100 can be rotated with respect to the frame 500 by bending the rod-shaped flexible portion 185a.

  The rod-like flexible portion 185a is coupled to the key side support portion 183 and the frame side support portion 585 using an attachment structure (so-called snap fit) described later. In the present embodiment, the mounting structure is designed so that the direction in which the snap-fit claw portion is hooked matches the longitudinal direction of the key 100. Since the snap-fit claw portion has a circumstance that it is desired to bend as much as possible, it can be said that the longitudinal direction is more advantageous from the viewpoint of securing the space than the scale direction in which the keys 100 are arranged with high density.

  FIG. 4 is a diagram illustrating a configuration of the structure 185 including the rod-like flexible portion 185a according to the first embodiment as viewed from the side. As shown in FIG. 4, the structure 185 has a structure in which first members 20a described later are attached to both ends of a rod-like flexible portion 185a. In FIG. 3, the first member 20a is provided at both ends of the rod-like flexible portion 185a so as to be opposite to each other, and each first member 20a is attached to the key side support portion 183 and the frame side support portion 585, respectively. By doing so, the key side support part 183 and the frame side support part 585 are coupled to the rod-like flexible part 185a. Details of the mounting structure including the first member 20a will be described later.

  The key 100 includes a front end key guide 151 and a side key guide 153. The front end key guide 151 is slidably in contact with the front end frame guide 511 of the frame 500. The front end key guide 151 is in contact with the front end frame guide 511 on both sides of the upper and lower scale directions. The side key guide 153 is slidably in contact with the side frame guide 513 on both sides in the scale direction. In this example, the side key guide 153 is arranged in a region corresponding to the non-appearance portion NV on the side surface of the key 100 and exists on the key front end side with respect to the connection portion 180 (plate-like flexible portion 181). You may arrange | position in the area | region corresponding to the part PV.

  The hammer assembly 200 is rotatably attached to the frame 500. At this time, the shaft support part 220 of the hammer assembly 200 and the rotation shaft 520 of the frame 500 are slidably contacted at least at three points. The front end portion 210 of the hammer assembly 200 contacts the inner space of the hammer support portion 120 so as to be slidable in the front-rear direction. The sliding portion, that is, the portion where the front end portion 210 and the hammer support portion 120 are in contact is located below the key 100 in the appearance portion PV (frontward from the rear end of the key body portion).

  In the hammer assembly 200, a metal weight 230 is disposed on the back side of the rotation shaft. In a normal state (when the key is not pressed), the weight portion 230 is placed on the lower stopper 410, and the front end portion 210 of the hammer assembly 200 pushes the key 100 back. When the key is depressed, the weight portion 230 moves upward and collides with the upper stopper 430. The hammer assembly 200 applies weight to the key depression by the weight portion 230. The lower stopper 410 and the upper stopper 430 are formed of a buffer material or the like (nonwoven fabric, elastic body, etc.).

  A sensor 300 is attached to the frame 500 below the hammer support portion 120 and the front end portion 210. When the sensor 300 is crushed on the lower surface side of the front end portion 210 by the key depression, the sensor 300 outputs a detection signal. As described above, the sensor 300 is provided corresponding to each key 100.

[Configuration of mounting structure]
Hereinafter, the mounting structure 20 in the present embodiment will be described. The attachment structure 20 of this embodiment is what is called a snap fit, and is a structure which couple | bonds components using the elasticity of material. A schematic configuration of the mounting structure 20 of the present embodiment will be described with reference to FIG.

  FIG. 5 is a diagram illustrating a case where the configuration of the mounting structure 20 according to the first embodiment is viewed from an oblique direction. Specifically, FIG. 5 shows a state in which the first member 20a and the second member 20b constituting the attachment structure 20 are coupled. In FIG. 5, the description will focus on only the portion of the mounting structure 20, but as described above, the first member 20 a is a member provided at both ends of the rod-shaped flexible portion 185 a as shown in FIG. 3. The second member 20b is a member constituting the mounting structure 20 in a pair with the first member 20a, and is a member corresponding to the key side support portion 183 and the frame side support portion 585 shown in FIG.

  For convenience of explanation, in the explanation of the mounting structure 20, the relative positional relationship between the respective parts constituting the first member 20 a and the second member 20 b with reference to the X axis, the Y axis, and the Z axis shown in FIG. 5. Will be explained. Specifically, the direction of the X-axis arrow is “front”, the opposite direction is “rear”, the direction of the Y-axis arrow is “right”, and the opposite direction is “left”. The direction of the Z-axis arrow is “upward” and the opposite direction is “downward”.

  As shown in FIG. 5, the mounting structure 20 in this embodiment uses the 1st member 20a and the 2nd member 20b combining. According to the above-described definition, the attachment structure 20 is configured by mounting the first member 20a from below the second member 20b. Here, in order to describe the first member 20a as the mounting side and the second member 20b as the receiving side, the state where the first member 20a is mounted to the second member 20b is the first member as shown in FIG. A state in which 20a and the second member 20b are coupled to each other.

  Further, in the present embodiment, the front-rear direction (direction along the X axis) of the mounting structure 20 coincides with the longitudinal direction of the key 100 shown in FIGS. As will be described later, the first member 20a is configured to be strongly coupled to the second member 20b when the flexible portion 21 is bent, but it is preferable that this bending be as large as possible.

  Since the key 100 is arranged at a high density in the scale direction (direction orthogonal to the longitudinal direction), there is little room to secure a space for greatly bending the first member 20a. Therefore, by making the front-rear direction of the mounting structure 20 coincide with the longitudinal direction of the key 100, the amount of bending of the first member 20a can be increased as much as possible, and space saving can be achieved.

  Next, the first member 20a and the second member 20b will be described individually.

  First, the 1st member 20a is demonstrated using FIG.6 and FIG.7. FIG. 6 is a diagram illustrating an example of the configuration of the first member 20a in the mounting structure 20 according to the first embodiment as viewed obliquely from above. Drawing 7 is a figure showing an example at the time of seeing the composition of the 1st member 20a in mounting structure 20 of a 1st embodiment from the side.

  The first member 20a shown in FIGS. 6 and 7 corresponds to the claw side member in the mounting structure 20 of the present embodiment. The first member 20 a connects the flexible portion 21, the hook portion 22 provided at one end of the flexible portion 21, the positioning portion 25 connected to the flexible portion 21, and the flexible portion 21 and the positioning portion 25. A connecting portion 27 is included. Here, for convenience of explanation, in the following explanation, the flexible portion 21 and the hanging portion 22 are collectively referred to as an attachment portion 23.

  The flexible part 21 is a bar-like or plate-like part made of a flexible material. For example, a plastic material can be used as the flexible material, but the material is not limited to this. The flexible portion 21 of the present embodiment is configured by a plate-shaped portion in which the direction along the X axis is the thickness direction and the direction along the Y axis is the width direction. Therefore, the flexibility of the flexible portion 21 is greatly deflected in the direction along the X axis (that is, the front-rear direction), and the direction along the Y axis (that is, the left-right direction) is larger than the direction along the X axis. It is designed to bend slightly. That is, the flexible portion 21 has a shape that is less flexible in the direction along the Y axis than the flexibility in the direction along the X axis.

  As shown in FIG. 5, when the first member 20a is attached to the second member 20b, the hooking portion 22 of the first member 20a is caught by a part of the second member 20b, so that the drop-off is prevented. Will be combined. Therefore, the flexible portion 21 is configured so that the hook portion 22 overlaps the second member 20b more deeply (that is, the hook amount increases) by increasing the flexibility in the direction along the X axis. ing.

  The hanging portion 22 is a portion that functions as a claw that is hooked to the second member 20 b in the mounting structure 20, is provided at one end of the flexible portion 21, and is a portion that protrudes forward from the flexible portion 21. Yes. In addition, in this embodiment, although the shape made to protrude only forward was illustrated, there is no restriction | limiting in particular in the direction to protrude, According to the structure (especially position of the surface where the hook part 22 is hooked) suitably What is necessary is just to make it protrude in a required direction.

  In the present embodiment, for convenience of explanation, the lower part from the one-dot chain line 24 shown in FIG. 7 is called the flexible part 21, and the upper part is called the hanging part 22. In the present embodiment, the flexible portion 21 and the hooking portion 22 are integrally formed. However, the flexible portion 21 and the hanging portion 22 may be formed of different members.

  In the hanging portion 22 of the present embodiment, the lower surface (surface located on the lower side) 22a of the protruding portion functions as a portion on which the hanging portion 22 is hooked when the first member 20a is attached to the second member 20b. It is. That is, the lower surface 22a of the protruding portion in the hook portion 22 is a portion corresponding to the nail in the snap fit. In the present embodiment, the lower surface 22a of the hook portion 22 receives the force in the Z-axis direction applied to the flexible portion 21, so that the first member 20a can be prevented from falling off from the second member 20b.

  Here, FIG. 8A is a diagram illustrating an example of the configuration of the hanging portion 22 in the mounting structure 20 of the first embodiment as viewed from the side. FIG. 8B is a diagram for explaining the operation of the hook portion 22 in the mounting structure 20 of the first embodiment.

  As shown in FIG. 8A, in this embodiment, when the hanging portion 22 is viewed from the side, the lower surface 22a of the hanging portion 22 and the surface 21a of the flexible portion 21 (specifically, the surface of the flexible portion 21). Of the whole, the angle α formed with the surface facing the side where the lower surface 22a exists is an obtuse angle. In other words, when viewed from the side, the lower surface 22a of the hook portion 22 can be said to be a surface inclined in the positive direction of the Z-axis (the direction of the arrow) with respect to the X-axis shown in FIG. Here, the X axis shown in FIG. 7 substantially coincides with the direction (flexible direction) in which the flexible portion 21 bends when the hanging portion 22 is superimposed on the second member 20b. Therefore, it can be said that the lower surface 22 a of the hanging portion 22 is a surface inclined upward with respect to the flexible direction of the flexible portion 21. As a result, when the first member 20a is attached to the second member 20b, the lower surface 22a of the hanging portion 22 is in contact with the upper surface of the second member 20b (the upper surface 31a of the main body 31 of the second member 20b described later). In this state, it is superimposed on the second member 20b.

  FIG. 8B shows a state in which the hanging portion 22 is coming off from the upper surface 31a of the second member 20b by a dotted line. In this state, force is applied to the hanging portion 22 in the direction of the arrow by the elastic force of the flexible portion 21. Therefore, the hanging portion 22 slides in the direction of the arrow while the lower surface 22a is in contact with the corner of the upper surface 31a (specifically, the edge of the first opening 33 described later), and the position indicated by the solid line Move to.

  As described above, for example, even when the hanging portion 22 is about to be detached from the second member 20 b due to deformation of the hanging portion 22, the elastic force toward the front of the flexible portion 21 is caused by the lower surface 22 a of the hanging portion 22. It is converted into an upward force. As a result, the lower surface 22a of the hook portion 22 works in a direction of increasing the hook amount of the hook portion 22 on the second member 20b (the length of the hook portion 22 superimposed on the second member 20b). That is, by making the angle α formed by the lower surface 22a of the hook portion 22 and the surface 21a of the flexible portion 21 continuous with the lower surface 22a of the hook portion 22 into an obtuse angle, the amount of hook portion self-healing action (hang) Part pulling action) can be added.

  Even if the position of the hanging portion 22 slightly varies, the lower surface 22a is always in contact with the second member 20b, so that backlash in the vertical direction can be prevented.

  The positioning part 25 is a part for determining the relative position of the attachment part 23 (particularly the hook part 22) with respect to the second member 20b, and is connected to the flexible part 21 by the connecting part 27. As will be described later, the relative positional relationship between the first member 20a and the second member 20b is fixed by inserting the positioning portion 25 into the second opening 35 of the second member 20b. As a result, since the relative position of the hook portion 22 with respect to the second member 20b is constant, a stable hook amount can be ensured.

  Next, the second member 20b will be described with reference to FIGS. FIG. 9 is a diagram illustrating an example of the configuration of the second member 20b in the mounting structure 20 according to the first embodiment as viewed obliquely from above. FIG. 10 is a diagram illustrating an example of the configuration of the second member 20b in the mounting structure 20 according to the first embodiment as viewed from above. FIG. 11 is a diagram illustrating an example of a configuration in which the second member 20b in the mounting structure 20 of the first embodiment is cut along A-A ′ illustrated in FIG. 9. FIG. 12 is a diagram illustrating an example of a configuration in which the second member 20b in the mounting structure 20 according to the first embodiment is cut along B-B ′ illustrated in FIG. 9. FIG. 13 is a diagram illustrating an example of the configuration of the second member 20b in the mounting structure 20 of the first embodiment when viewed from the back (back side).

  The second member 20b shown in FIGS. 9 to 13 corresponds to a receiving-side member with respect to the first member 20a in the mounting structure 20 of the present embodiment. The second member 20 b includes a main body 31, and a first opening 33, a second opening 35, a notch 37, and a protrusion 39 provided in the main body 31. As described above, the main body portion 31 of the present embodiment is a main body portion of the second member 20b and corresponds to the key side support portion 183 and the frame side support portion 585 shown in FIG.

  The first opening 33 is a portion corresponding to a hole provided through the main body 31. When the first member 20a is attached to the second member 20b, the attachment portion 23 of the first member 20a is inserted into the first opening 33 from below the main body portion 31. Then, after passing through the first opening portion 33, the first member 20 a and the second member 20 b are coupled to each other by the overlapping portion 22 of the first member 20 a overlapping the upper surface 31 a of the main body portion 31. Thus, it can be said that the 1st opening part 33 is an internal space which uses the main-body part 31 as the wall surface formed in order to insert the attachment part 23 (the flexible part 21 and the hook part 22) in the 1st member 20a.

  As shown in FIGS. 11 and 12, the second member 20b of the present embodiment has two inclined surfaces, that is, a first inclined surface 34a and a second inclined surface 34b, as inner wall surfaces of the first opening 33. ing. As shown in FIG. 11, the first inclined surface 34 a is an inclined surface that constitutes a part of the front wall surface when the cross section including the X axis is viewed from the left side, and the second inclined surface 34 b is As shown in FIG. 12, when the cross section containing a Y-axis is seen from the front side, it is an inclined surface which comprises a part of wall surface of the right side (direction of the arrow of a Y-axis). Any of the inclined surfaces is provided so that the width of the first opening 33 becomes narrower toward the top when the cross section of the first opening 33 is viewed from the side.

  The first inclined surface 34 a and the second inclined surface 34 b are arranged at a position where the hook portion 22 corresponding to the tip portion of the mounting portion 23 contacts when the mounting portion 23 is inserted into the first opening 33. Therefore, when the attachment portion 23 is inserted into the first opening 33, the hook portion 22 slides on the respective inclined surfaces, so that the position of the hook portion 22 (position when the positioning portion 25 is used as a reference) is front and back. Move in the left or right direction. In addition, when the hanging portion 22 slides on the first inclined surface 34a and the second inclined surface 34b, strictly speaking, the upper surface of the hanging portion 22 is in contact with each inclined surface. Here, the “upper surface of the hook portion” refers to the entire surface visually recognized when the hook portion 22 is viewed from above. That is, when the hanging portion 22 is a quadrangular pyramid as in the present embodiment, vertices and ridge lines included in the range viewed from above are also included in the upper surface.

  Similarly to the first opening 33, the second opening 35 is a portion corresponding to a hole provided through the main body 31. When the first member 20a is attached to the second member 20b, the positioning portion 25 of the first member 20a is inserted into the second opening 35 from below the main body portion 31. The positioning portion 25 is fixed inside the second opening 35 by an interference fit, whereby the relative positional relationship of the mounting portion 23 with respect to the second member 20b is determined. Thus, it can be said that the 2nd opening part 35 is an internal space which uses the main-body part 31 as the wall surface formed in order to insert the positioning part 25 in the 1st member 20a.

  A notch 37 shown in FIG. 13 is a slit-like portion provided on the back surface 31 b of the main body 31. In the present embodiment, for example, a case where a plate-like member is connected to the positioning portion 25 to reinforce the strength of the entire mounting structure, or the key-side support portion 183 and the frame-side support portion are connected by connecting the plate-like members. When extending the length of 585, it is provided so that these plate-like members can be arranged.

  The protrusion 39 is a portion provided at the end of the notch 37, and is provided for the purpose of regulating the spread of the notch 37. Specifically, in a state where the first member 20a is attached to the second member 20b, the two protrusions 39 are sandwiched by a part of the first member 20a, so that the spread of the notch 37 is restricted. The

  Next, an effect based on the shape of the upper end (opening region formed in the upper surface 31a) of the first opening 33 of the second member 20b will be described. FIG. 14 is a view for explaining the upper end of the first opening 33 of the second member 20b in the mounting structure 20 of the first embodiment. FIG. 15 is a diagram illustrating a positional relationship between the first opening 33 included in the second member 20b and the hanging portion 22 included in the first member 20a in the mounting structure 20 according to the first embodiment.

  As shown in FIG. 14, the first opening 33 in the present embodiment includes a first opening region 33 a and a second opening region 33 b when viewed from above. The “opening region” means a region surrounded by an outline formed by the edge of the opening when the opening is viewed from the upper surface. That is, if the outline formed by the edge of the first opening portion 33 is divided into two with the dotted line 33c as a boundary, it can be understood as the first opening region 33a and the second opening region 33b.

  At this time, the first opening region 33a has a size that allows the hook portion 22 of the first member 20a to pass therethrough, and the second opening region 33b has a size that the hook portion 22 of the first member 20a cannot pass therethrough. Have. In the present embodiment, the central axis of the flexible portion 21 is shifted in advance to the right side (the direction in which the Y-axis arrow is directed) with respect to the central axis of the positioning portion 25. That is, the central axis of the flexible part 21 and the central axis of the positioning part 25 are not parallel. Therefore, the hook portion 22 inserted from below the first opening portion 33 passes through the first opening region 33a at the position indicated by the dotted line in FIG. 15 and then indicated by the solid line in FIG. 15 due to the elastic force of the flexible portion 21. Move until it is in place.

  As shown in FIG. 15, the hook portion 22 that is in a predetermined position overlaps the second member 20 b beyond the first side 32 a common to the first opening region 33 a and the second opening region 33 b. That is, in the case of the present embodiment, the lower surface 22a of the hanging portion 22 is superimposed on the second member 20b and is in contact with the first side 32a. Here, when the length that the hanging portion 22 overlaps with the second member 20b is L, this length L corresponds to the “hanging amount”.

  The second opening region 33b has a second side 32b provided obliquely with respect to the first side 32a common to the first opening region 33a. As shown in FIG. 14, the second side 32b is provided diagonally facing the first side 32a. There is no particular limitation on the angle formed by the first side 32a and the second side 32b, but in consideration of ease of pulling in the mounting portion 23, which will be described later, into the second opening region 33b, 5 ° to 30 ° (preferably 10 ° to 20 °) is preferable.

  As shown in FIG. 15, in a state where the first member 20a is attached to the second member 20b, the attachment portion 23 is in contact with the first side 32a and the second side 32b of the second member 20b. Specifically, the first side 32 a and the second side 32 b are in contact with the mounting portion 23 so as to sandwich the mounting portion 23.

  Therefore, in the state shown in FIG. 15, the inner wall surface of the first opening portion 33 including the second side 32 b is applied even if a downward force (a force pulling the attachment portion 23 downward) is applied to the flexible portion 21. It plays the role which prevents the movement to the back side of the hanging part 22. FIG. As described above, the mounting structure 20 of the present embodiment can prevent the first member 20a from dropping off from the second member 20b with a simple structure, and can prevent unintended separation of components.

  Further, even if the position of the hooking portion 22 slightly varies, a part of the mounting portion 23 is always in contact with the second member 20b.

  In addition, it does not matter in particular which part of the attachment part 23 touches the 1st edge | side 32a and the 2nd edge | side 32b. That is, with regard to the second side 32b, the flexible portion 21 may be in contact with the engagement portion 22 depending on the amount of engagement described above. In any case, it is important that the attachment portion 23 is sandwiched between the first side 32a and the second side 32b.

  Further, at this time, as shown in FIG. 15, the attachment portion 23 is in contact with the second side 32 b at a rear corner portion (here, a right corner portion) of the attachment portion 23. As described above, when the attachment portion 23 is inserted into the first opening portion 33, force is always applied to the right side of the entire flexible portion 21 and the hanging portion 22. Therefore, the corner on the rear side of the mounting portion 23 contacts the second side 32b (strictly speaking, the inner wall surface of the first opening 33 including the second side 32b). A force that moves forward (in the direction of the arrow on the X axis) acts, and as a result, the amount of engagement of the engagement portion 22 on the second member 20b increases.

  Furthermore, in the mounting structure 20 of the present embodiment, as described with reference to FIGS. 8A and 8B, when viewed from the side, the lower surface 22 a of the hanging portion 22 and the lower surface 22 a of the hanging portion 22 can be continuous. An angle α formed with the surface 21a of the flexible portion 21 is an obtuse angle. Therefore, since the force which moves to the front side acts further on the attachment part 23, it has the structure which the amount of hooks to the 2nd member 20b of the hook part 22 increases more.

(Modification 1)
A modification of the first embodiment will be described. FIG. 16A is a diagram illustrating a configuration of the hanging portion 41 in the mounting structure 20 of Modification 1 of the first embodiment.

  As illustrated in FIG. 16A, the hanging portion 41 of the first modification has a lower surface 41 a of the hanging portion 41 and a surface 21 a of the flexible portion 21 (specifically, the surface of the flexible portion 21 when viewed from the side. The angle β formed with the entire surface) is an acute angle. In other words, when viewed from the side, the lower surface 22a of the hooking portion 22 is a surface inclined in the negative direction of the Z axis (the direction opposite to the direction of the arrow) with respect to the X axis shown in FIG. It can also be said. That is, it can be said that the lower surface 22a of the hanging portion 22 is a surface inclined downward with respect to the flexible direction of the flexible portion 21 described above. Thereby, when the 1st member 20a is mounted | worn with respect to the 2nd member 20b, the hook part 22 overlaps with the 2nd member 20b in the state which the front-end | tip part 41b contact | connected the upper surface of the 2nd member 20b.

  When the hanging part 41 having the configuration shown in FIG. 16A is used, even if a strong downward force is applied to the flexible part 21 and the hanging part 41, the hanging part 41 is not easily deformed. That is, when the configuration of the first modification is employed, it is possible to realize a mounting structure that has high strength against the force of pulling downward.

(Modification 2)
Another modification of the first embodiment will be described. FIG. 16B is a diagram illustrating a configuration of the main body 42 in the mounting structure 20 according to the second modification of the first embodiment.

  As shown in FIG. 16B, the main body portion 42 of the second modification has an inclined portion 42 a in the vicinity of the edge of the first opening portion 33. That is, in this modification, an example in which the inclined portion (lower surface 22a) is not provided on the hanging portion side as shown in FIG. 8A but on the main body portion 42 side is shown.

  In FIG. 16B, the example which combined the hook part 41 by the modification 1 shown to FIG. 16A with respect to the 2nd member 20b which has the inclination part 42a is shown. In this case, the front end portion 41b of the hook portion 41 and the inclined portion 42a are in contact with each other, and the front end portion 41b slides on the slope of the inclined portion 42b by the forward force caused by the bending of the flexible portion 21. . As a result, a mounting structure having a high strength with respect to the downward pulling force is realized, and a force for moving the hooking portion 41 forward by the inclined portion 42a works, so that the hooking portion 41 is hooked on the second member 20b. The amount is increased.

  In addition, although the example which combined the hanging part 41 by the modification 1 was shown here, it is not restricted to this, What kind of hanging part will be sufficient if it is the structure which the front-end | tip part of a hanging part can slide on the inclination part 42a. May be used.

  As described above, on the basis of the configuration described as the embodiment of the present invention, a person skilled in the art appropriately added, deleted, or changed a design, or a process added, omitted, or changed conditions, As long as the gist of the present invention is provided, it is included in the scope of the present invention.

  Of course, other operational effects that are different from the operational effects brought about by the above-described embodiment are obvious from the description of the present specification or can be easily predicted by those skilled in the art. It is understood that this is brought about by the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Keyboard device, 10 ... Keyboard assembly, 70 ... Sound source device, 80 ... Speaker, 90 ... Housing, 100 ... Key, 100w ... White key, 100b ... Black key, 120 ... Hammer support part, 151 ... Front end key guide, 153... Side key guide, 180 .. connection portion, 181... Plate-like flexible member, 183... Key side support portion, 185... Structure including a rod-like flexible portion, 185 a. 210: Front end portion, 220: Shaft support portion, 230 ... Weight portion, 410 ... Lower stopper, 430 ... Upper stopper, 500 ... Frame, 511 ... Front end frame guide, 513 ... Side frame guide, 520 ... Rotating shaft, 585 ... frame side support part, 710 ... signal conversion part, 730 ... sound source part, 750 ... output part, 185a ... rod-shaped flexible part, 20 ... mounting structure, 20a ... first member, 20b ... second member, 2 DESCRIPTION OF SYMBOLS 1 ... Flexible part, 22 ... Hanging part, 22a ... Lower surface, 23 ... Mounting part, 25 ... Positioning part, 27 ... Connection part, 31 ... Main body part, 31a ... Upper surface, 32a ... First edge, 32b ... Second edge 33 a first opening region 33 b a second opening region 34 a a first inclined surface 34 b a second inclined surface 35 a second opening 37 a notch 39 ... Projection part, 41 ... hanging part, 41a ... lower surface, 41b ... tip part, 42 ... main body part, 42a ... inclined part

Claims (9)

A first member including a flexible portion and a mounting portion having a hook portion provided at one end of the flexible portion;
A second member including an opening having a first opening region having a size through which the hook portion can pass and a second opening region having a size through which the hook portion cannot pass, when viewed from above;
With
The second opening region has a first side common to the first opening region and a second side provided obliquely facing the first side.   The attachment structure according to claim 1, wherein the attachment portion is in contact with both the first side and the second side in a state where the first member is attached to the second member.   The mounting structure according to claim 2, wherein the first side and the second side are in contact with the mounting portion so as to sandwich the mounting portion.   The attachment structure according to claim 2 or 3, wherein the attachment portion contacts the second side at a rear corner.   The mounting structure according to claim 1, wherein the flexible portion has a lower flexibility in a direction orthogonal to the direction toward the first side than the flexibility in the direction toward the first side.   The mounting structure according to claim 1, wherein an angle formed between a lower surface of the hanging portion and a surface of the flexible portion is an obtuse angle. A first member including a flexible portion and a mounting portion having a hook portion provided at one end of the flexible portion;
A second member including an opening having a first opening region having a size through which the hook portion can pass and a second opening region having a size through which the hook portion cannot pass, when viewed from above;
With
The mounting structure, wherein the second opening region has one side that works in a direction in which a hooking amount of the hooking portion with respect to the second member increases in a state where the first member is attached to the second member.   The mounting structure according to claim 7, wherein the one side of the second opening region is disposed obliquely with respect to the other side facing the one side.   The attachment structure according to claim 7, wherein a lower surface of the hook portion acts in a direction in which a hook amount of the hook portion with respect to the second member increases in a state where the first member is attached to the second member.

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