WO2018021334A1

WO2018021334A1 - Attachment structure

Info

Publication number: WO2018021334A1
Application number: PCT/JP2017/026906
Authority: WO
Inventors: 俊介市来
Original assignee: ヤマハ株式会社
Priority date: 2016-07-26
Filing date: 2017-07-25
Publication date: 2018-02-01
Also published as: JP2018017798A

Abstract

An attachment structure according to the present invention is provided with: a first member that includes an attachment part having a flexible section and a hook section that is provided at one end of the flexible section; and a second member that includes an inclined surface that is inclined with respect to an insertion/removal direction of the attachment part. In a state in which the first member is attached to the second member, the flexible section is partially inserted into a groove section provided on the inclined surface, and the inclined surface is located below the hook section.

Description

Mounting structure

The present invention relates to a mounting structure that couples parts using the 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 be easy to join parts together and to be fixed so that it cannot be easily detached after being joined once. As an attachment structure considering such performance, for example, Patent Document 1 proposes an attachment structure for a printed wiring board.

Japanese Utility Model Publication No. 1-176987

However, since the mounting structure proposed in Patent Document 1 does not consider variations in component dimensions, components may be unintentionally separated due to variations in component dimensions, or may be mounted between components. May become difficult.

Also, as a design that takes into account variations in component dimensions, it is conceivable to provide a certain margin in the nail 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 parts.

An attachment structure according to an embodiment of the present invention includes a first member having an attachment portion, and a second member to which the first member can be attached. The attachment portion includes a flexible portion extending in one direction and the A hook portion provided at one end of the flexible portion; the second member has an insertion hole into which the attachment portion can be inserted; and the inner wall surface of the insertion hole has an insertion direction of the attachment portion. An inclined surface that is inclined with respect to the second member is formed, and in a state where the first member is attached to the second member, a part of the flexible portion enters a groove provided in the inclined surface, and the inclined surface is Located below the hook. At this time, in the state where the first member is attached to the second member, the insertion / extraction direction of the attachment portion substantially coincides with the longitudinal direction of the flexible portion.

It is desirable that the inclined surface functions so as to keep the hook portion away from the mounting position in the process of mounting the first member on the second member. In other words, it is desirable that the inclined surface functions to guide the hook portion to the entrance of the groove portion when the first member is attached to the second member.

When the first member is attached to the second member, the hook portion may be configured to slide on the inclined surface.

The width of the groove (for example, a distance orthogonal to the length in the longitudinal direction) is preferably wider than the flexible portion and narrower than the hook portion.

In the state in which the first member is attached to the second member, it is preferable that the hook portion contacts the second member at at least two places sandwiching the groove portion.

The upper surface of the second member may include a restraining surface that works to prevent the first member from falling off when the first member is attached to the second member. The stop surface may be a surface that is inclined with respect to the insertion / extraction direction of the attachment portion at an angle different from that of the inclined surface. At this time, in a state where the first member is attached to the second member, the hook portion is disposed above the groove portion, and the restraining surface is disposed below the hook portion. it can.

The flexible portion may be less flexible in a direction orthogonal to the pressing direction than the flexibility in the pressing direction in which the hook portion is pressed by the inclined surface.

The passage can be constituted by an insertion hole penetrating the second member, and the inclined surface can be formed on the inner wall surface of the insertion hole.

The above-described attachment structure may be applied to a keyboard device having a structure in which a key is attached to a frame using the attachment structure. At this time, it is preferable that the longitudinal direction of the groove portion coincides with the scale direction of the key.

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 at the time of seeing the structure inside the housing | casing of 1st Embodiment from the side surface. It is a figure which shows an example at the time of seeing 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 at the time of seeing the structure which combined the 1st member and 2nd member of 1st Embodiment from the side. It is a figure which shows an example at the time of seeing the structure of the 1st member of 1st Embodiment from the side. It is a figure which shows an example at the time of seeing the structure of the 1st member of 1st Embodiment from the front. It is a figure which shows an example at the time of seeing the structure of the 2nd member of 1st Embodiment from upper direction. It is a figure which shows an example of the structure of the one cross section in the 2nd member of 1st Embodiment. It is a figure which shows an example of the structure of the one cross section in the 2nd member of 1st Embodiment. It is a figure which shows an example at the time of seeing the structure which combined the 1st member and 2nd member of 1st Embodiment from upper direction. It is a figure which shows an example of the structure of the one cross section in the structure which combined the 1st member and 2nd member of 1st Embodiment. It is a figure which shows an example of the structure of the one cross section in the structure which combined the 1st member and 2nd member of 1st Embodiment. It is a figure which shows an example at the time of seeing the operation | movement at the time of combining the 1st member and 2nd member of 1st Embodiment in the cross section from a side. It is a figure which shows an example at the time of seeing the operation | movement at the time of combining a 1st member and a 2nd member from upper direction. It is a figure which shows an example at the time of seeing the operation | movement at the time of combining a 1st member and a 2nd member toward the front from the inside of a 1st insertion hole. It is a figure which shows an example at the time of seeing the structure of the 1st member of 2nd Embodiment from the side. It is a figure which shows an example at the time of seeing the structure of the 1st member of 2nd Embodiment from the front. It is a figure which shows an example of the structure of the one cross section in the 2nd member of 3rd Embodiment. It is a figure which shows an example of the structure of the one cross section in the 2nd member of 4th Embodiment. It is a perspective view which shows the other example of the attachment structure of this invention. It is a side view of FIG. It is a top view of FIG. It is a side view which shows the process until the attachment of the 1st member and 2nd member in the attachment structure shown in FIG.

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, and the white key 100w and the black key 100b are arranged side by side. The number of keys 100 is N, and is 88 in the example of FIG. 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 simply referred to. Also in the following description, when “w” is added at the end of the reference sign, it means that the structure 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 housing 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 key 100), and operates 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 disposed 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 keyboard assembly 10 includes a plurality of connecting portions 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.

Each key 100 is pivotally connected to the frame 500 via each connecting portion 180. Specifically, the connection part 180 includes a plate-like flexible part 181, a key-side support part 183, and a rod-like flexible part 185a. 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-shaped 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.

In the present embodiment, both the coupling portion between the rod-shaped flexible portion 185a and the key-side support portion 183 of the key 100 and the coupling portion between the rod-shaped flexible portion 185a and the frame-side support portion 585 of the frame 500 will be described later. An attachment structure 20 (so-called snap fit) is provided. In the present embodiment, the mounting structure is designed so that the direction in which the snap fit flexible portion bends greatly (the direction along the X axis in FIG. 6) and the longitudinal direction of the key 100 are orthogonal to each other. That is, the direction in which the flexible portion of the snap fit largely bends and the key scale direction coincide with each other. The advantages will be described later.

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 a first member 20a described later is 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. is doing. Thereby, the key side support part 183 and the rod-like flexible part 185a, and the frame side support part 585 and the rod-like flexible part 185a are coupled. 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 covers the front end frame guide 511 of the frame 500 and slidably contacts the front end frame guide 511. 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 disposed in a region corresponding to the non-appearance portion NV on the side surface of the key 100, and is present on the key front end side with respect to the connection portion 180 (plate-like flexible portion 181). However, the side key guide 153 may be disposed in a region corresponding to the appearance portion PV.

The hammer assembly 200 is attached to the frame 500 so as to be rotatable. 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 portion 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. On the other hand, 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.).

The 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]
Next, the mounting structure 20 in this 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 showing a configuration of the mounting structure 20 of the first embodiment as viewed from the side. 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.

In the following description of the mounting structure, for convenience of explanation, the relative positional relationship between the respective parts constituting the first member 20a and the second member 20b with reference to the X axis, the Y axis, and the Z axis shown in FIG. 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 a combination of the first member 20a and the second member 20b. 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 mounted side (receiving side), the state where the first member 20a is mounted on the second member 20b is as shown in FIG. The first member 20a and the second member 20b are joined together.

In the present embodiment, the front-rear direction (direction along the X axis) of the mounting structure 20 matches the scale direction of the key 100 shown in FIGS. As will be described later, the first member 20a is configured to be attached to the second member 20b by hooking the hook portion 22 on the upper surface (restraining surface) of the second member 20b. The mounting structure 20 has a structure that is difficult to come out with respect to a force in the left-right direction (direction along the Y axis).

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

First, the first member 20a will be described with reference to FIGS. Drawing 6 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. Drawing 7 is a figure showing an example at the time of seeing composition of the 1st member 20a in attachment structure 20 of a 1st embodiment from the front.

The first member 20a shown in FIGS. 6 and 7 includes a plate-like connecting portion 27, a mounting portion 23 disposed on the connecting portion 27, and a positioning portion 25 that is also disposed on the connecting portion 27. I have. The attachment portion 23 includes a flexible portion 21 extending in one direction from the connecting portion 27 and a claw-shaped hook portion 22 provided at one end of the flexible portion 21.

The flexible part 21 is a rod-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. As an aspect, the flexible portion 21 of the present embodiment is configured by a plate-like member 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 flexible portion 21 is greatly bent 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 bent smaller than the direction along the X axis. ing. 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 such that the hook portion 22 enters deeper into a groove portion 32 of the second member 20b described later by increasing the flexibility in the direction along the X axis.

The hook portion 22 is a portion that is hooked to the second member 20b in the mounting structure 20, and is provided at one end of the flexible portion 21, and forward (see FIG. 6) and left-right direction (see FIG. 7) from the flexible portion 21. It becomes the part which protruded toward. That is, it is formed in a nail shape. In the present embodiment, the shape protruding forward is described as an example, but it is not always necessary to protrude in the front-rear direction. The first member 20a of the present embodiment only needs to protrude at least in the width direction (that is, the left-right direction) of the groove portion 32 provided in the second member 20b.

In addition, in this embodiment, although the flexible part 21 and the hook part 22 are integrally formed, it is also possible to comprise by a respectively different member.

In the hanging portion 22 of the present embodiment, the protruding portion in the left-right direction (the portion protruding with respect to the flexible portion 21) is, as will be described later, when the first member 20a is attached to the second member 20b. It is a part caught on the upper surface of the second member 20b. In this embodiment, when the flexible portion 21 enters the groove portion 32 of the second member 20 b, the hook portion 22 is disposed on the groove portion 32. Therefore, the protruding portion 22a in the left-right direction of the hanging portion 22 can contact the upper surface of the second member 20b, and can support the force in the Z-axis direction (insertion / removal direction of the first member 20a) applied to the flexible portion 21. As a result, the first member 20a can be prevented from falling off from the second member 20b.

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. The positioning portion 25 is formed so as to extend in a rod shape substantially parallel to the flexible portion 21 of the mounting portion 23. More specifically, the positioning portion 25 includes a positioning portion main body 251 having a rectangular cross section standing from the connecting portion 27 and a tip portion 252 disposed at the tip thereof, and these are integrally formed. . And the outer diameter of the front-end | tip part 252 is smaller than the positioning part main body 251. FIG. In addition, 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 insertion hole 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 becomes constant, the first member 20a can be mounted at a stable position.

Next, the second member 20b will be described with reference to FIGS. FIG. 8 is a diagram illustrating an example of the configuration of the second member 20b of the first embodiment as viewed from above. 9 is a cross-sectional view taken along line AA ′ of FIG. 10 is a cross-sectional view taken along the line BB ′ of FIG.

The second member 20b shown in FIGS. 8 to 10 corresponds to a member on the receiving side with respect to the first member 20a in the mounting structure 20 of the present embodiment. The second member 20b includes a rectangular parallelepiped body portion 31, and the body portion 31 is formed with a first insertion hole 33 and a second insertion hole 35 extending in the Z direction. 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 insertion hole 33 penetrates the main body 31 in the Z direction. 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 insertion hole 33 from below the main body portion 31. Therefore, it can be said that the first insertion hole 33 is an internal space having the main body portion 31 as a wall surface, which is formed to insert the attachment portion 23 (the flexible portion 21 and the hanging portion 22) in the first member 20a.

The second member 20b of the present embodiment has a pair of inclined surfaces 33a as the inner wall surface of the first insertion hole 33, as shown in FIGS. Each inclined surface 33a is formed in parallel to the front surface of the first insertion hole 33 with a space in the left-right direction, whereby a groove 32 is formed between both inclined surfaces 33a. Each inclined surface 33 a extends from near the middle in the vertical direction of the first insertion hole 33 to the upper end of the first insertion hole 33, that is, the upper surface 31 a of the main body 31. More specifically, each inclined surface 33a is formed to extend rearward in the X direction as it goes upward in the Z-axis direction. That is, the width of the first insertion hole 33 in the X direction becomes narrower as it goes upward in the portion where the both inclined surfaces 33a are formed. As a result, as shown in FIG. 8, in the upper surface 31a of the main body 31, the opening of the first insertion hole 33 is shortened in the length (X1) in the front-rear direction at the portion where each inclined surface 33a is formed. Yes. And the protrusion part (groove part 32) extended ahead is formed in this opening by the groove part 32 between the inclined surfaces 33a.

In addition, the insertion / extraction direction of the above-mentioned attachment part 23 substantially corresponds to the longitudinal direction of the flexible part 21 shown in FIG.6 and FIG.7. Here, “substantially match” means not only when matching in a strict sense, but also matching in a direction extending long as a whole regardless of the shape of the flexible portion 21. Moreover, in this embodiment, although the inclined surface 33a showed the example provided in a part of inner wall surface of the 1st insertion hole 33, it inclined entirely from a lower end to an upper end, and it has the inclined surface 33a with it. It is good.

The inclined surface 33 a is disposed at a position where the hook portion 22 corresponding to the tip of the mounting portion 23 contacts when the mounting portion 23 is inserted into the first insertion hole 33. Therefore, when the attachment portion 23 is inserted into the first insertion hole 33, the hook portion 22 slides on the inclined surface 33a, so that the position of the hook portion 22 (position with respect to the positioning portion 25) is the front-rear direction. It moves in (X-axis direction).

In addition, when the hanging portion 22 slides on the inclined surface 33a, strictly speaking, the upper surface of the hanging portion 22 contacts the inclined surface 33a. 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.

The second insertion hole 35 penetrates the main body portion 31 in the Z direction similarly to the first insertion hole 33. More specifically, the first insertion hole 33 and the second insertion hole 35 are disposed substantially in parallel so as to be aligned in the X direction, the first insertion hole 33 is disposed on the front side, and the second insertion hole 35 is disposed on the rear side. ing. The second insertion hole 35 has a rectangular cross section over almost the entire Z direction, but only the upper end portion has a circular cross section. Thereby, a circular opening is formed in the upper surface 31 a of the main body 31. Further, the circular opening has a shape corresponding to the distal end portion 252 of the positioning portion 25. The portion of the second insertion hole 35 having a rectangular cross section is substantially the same as the outer shape of the positioning portion main body 251, whereby the positioning portion main body 251 is fixed in the second insertion hole 35.

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 insertion hole 35 from below the main body portion 31. Then, the positioning portion 25 is fixed inside the second insertion hole 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 second insertion hole 35 is an internal space that is formed to insert the positioning portion 25 in the first member 20a and has the main body portion 31 as a wall surface.

Next, a state where the first member 20a is attached to the second member 20b will be described. FIG. 11 is a diagram illustrating an example of a structure (mounting structure 20) in which the first member 20a and the second member 20b are combined as viewed from above. 12 is a cross-sectional view taken along line AA ′ of FIG. 13 is a cross-sectional view taken along line BB ′ of FIG.

As shown in FIGS. 11 to 13, in a state where the first member 20a is attached to the second member 20b, a part of the flexible portion 21 of the first member 20a is provided on the inclined surface 33a of the second member 20b. It will be in the state where it was settled in the groove part 32 formed. Thereby, the hook part 22 contacts the second member 20b (specifically, the upper surface 31a of the main body part 31) at at least two places sandwiching the groove part 32, and is supported from below. Therefore, even if a force for pulling downward with respect to the flexible portion 21 (a force in a direction of pulling out the attachment portion 23 from the second member 20b) is applied, the hanging portion 22 is applied to the upper surface 31a of the main body portion 31 in the second member 20b. Because it gets caught, it does not fall off easily. That is, unintentional separation between components constituting the attachment structure 20 can be prevented.

In order to obtain the mounting state described above, the width of the groove portion 32 is designed to be wider than the width of the flexible portion 21 and narrower than the width of the hanging portion 22. However, “width” here refers to the distance in the Y-axis direction. Moreover, the part except the groove part 32 among the 1st insertion holes 33 has ensured the magnitude | size which the hook part 22 can pass.

Further, the length in the longitudinal direction of the groove portion 32 (the distance in the X-axis direction in FIG. 11) is not particularly limited, but from the viewpoint of preventing the hanging portion 22 from falling off, at least the length of the hanging portion 22 in the X-axis direction. Is also preferably long. That is, in the state where the first member 20a is attached to the second member 20b, the length of the groove portion 32 in the longitudinal direction is set so that the entire hook portion 22 is superposed on the upper surface 31a of the main body portion 31. Is preferably designed.

Furthermore, it is preferable that the longitudinal direction of the groove 32 is provided so as to be orthogonal to the longitudinal direction of the key 100 shown in FIGS. In other words, the groove 32 is designed such that its longitudinal direction coincides with the scale direction of the key 100.

In the mounting structure 20 of the present embodiment, in the state where the first member 20a is attached to the second member 20b, what force is applied to the first member 20a in the left-right direction (the direction along the Y axis). However, the first member 20a does not fall off. Therefore, by aligning the longitudinal direction of the key 100 with the direction orthogonal to the longitudinal direction of the groove portion 32, it is possible to effectively prevent the first member 20a from being accidentally dropped off.

Further, the positioning portion 25 is inserted into the second insertion hole 35. At this time, the distal end portion 252 of the positioning portion 25 is in a state of slightly protruding from the upper end opening of the second insertion hole 35 to the outside. Further, since the positioning portion 25 is fixed inside the second insertion hole 35 by an interference fit, the positioning portion main body 251 can be prevented from moving in the X direction or the Y direction within the second insertion hole 35. .

Here, the operation when the first member 20a is attached to the second member 20b will be described with reference to FIGS. FIG. 14 is a diagram illustrating an example of an operation when combining the first member and the second member when viewed in a cross-section from the side. FIG. 15 is a diagram illustrating an example of an operation when combining the first member and the second member as viewed from above. FIG. 16 is a diagram illustrating an example of an operation when combining the first member and the second member when viewed from the inside of the first insertion hole 33 toward the front. FIG. 16 corresponds to an example of a cross section taken along CC ′ in FIG.

FIG. 14 shows a state where the first member 20a is attached to the second member 20b by moving the first member 20a in the direction of the arrow from below. At this time, the attachment portion 23 and the positioning portion 25 are inserted into the first insertion hole 33 and the second insertion hole 35, respectively, and when the hook portion 22 moves upward, the upper surface of the hook portion 22 first comes into contact with each inclined surface 33a. .

Thereafter, as the attachment portion 23 moves upward in the first insertion hole 33, the hook portion 22 is pressed backward while sliding on both inclined surfaces 33a. Along with this, the flexible portion 21 bends backward, and the hanging portion 22 moves backward (in the direction indicated by the arrow in FIG. 15). Here, as described above, since the width of the hook portion 22 is larger than the width of the groove portion 32, the hook portion 22 does not enter the groove portion 32 as shown in FIG. 16. That is, in the state shown in FIGS. 14 to 16, a force directed forward (in the direction of the arrow on the X axis in FIG. 14) is applied to the hanging portion 22 by the bending of the flexible portion 21. However, since the hook portion 22 does not enter the groove portion 32 and comes into contact with the inclined surface 33a, as a result, the hook portion 22 slides back on the inclined surface 33a as the mounting portion 23 moves upward ( It moves in the direction opposite to the arrow on the X axis in FIG.

Then, when the entire hook portion 22 passes through the first insertion hole 33, the pressing from the inclined surface 33a against the hook portion 22 is released. Therefore, as the bending of the flexible portion 21 returns to the original state, the hanging portion 22 moves forward. As a result, the flexible portion 21 enters the groove portion 32, and the hook portion 22 can move above the groove portion 32 (that is, above the inclined surface 33a). FIGS. 11 to 13 described above show a state in which the first member 20a is attached to the second member 20b through the operations described above.

In this manner, the inclined surface 33a provided on the inner wall surface of the first insertion hole 33 keeps the hook portion 22 away from the final mounting position (the mounting position of the hook portion 22 shown in FIGS. 11 to 13). It can be said that this is a functional site. In other words, it can be said that the portion functions to guide the hook portion 22 to the entrance of the groove portion 32.

In order to move the hook portion 22 inserted into the first insertion hole 33 backward (in the direction opposite to the arrow on the X axis in FIG. 14), the inclined surface 33 a is located above the hook portion 22. It is sufficient that at least a part of the hook portion 22 (specifically, the upper surface of the hook portion 22) is provided at a position where it slides. For example, as shown in FIG. 14, it may be provided in a part of the inner wall surface of the first insertion hole 33, or the entire inner wall surface may function as the inclined surface 33a.

As described above, in the attachment structure 20 of the present embodiment, as shown in FIG. 10, the pair of inclined surfaces 33 a that are inclined with respect to the insertion / extraction direction 40 of the attachment portion 23 are provided in the second insertion hole 35, and The groove portion 32 is provided between the both inclined surfaces 33a. Thereby, in the process of mounting the first member 20a on the second member 20b, the hook portion 22 is moved backward (in a direction away from the inclined surface 33a) while sliding, and the groove portion 32 and the inclined surface are mounted in the mounted state. It becomes possible to arrange the hanging portion 22 above 33a.

As a result, even if a strong force pulling downward is applied to the flexible portion 21 of the mounting portion 23, the hooking portion 22 contacts the upper surface 31a of the main body portion 31 of the second member 20b and supports the downward force. The first member 20a does not easily fall off. That is, unintentional separation between components constituting the attachment structure 20 can be prevented.

Second Embodiment
2nd Embodiment demonstrates the example which made the structure of the attachment part 23 different in the 1st member 20a of 1st Embodiment. Specifically, the case where the outer shape of the hanging portion 22 is a cylindrical shape will be described. In the present embodiment, description will be made by paying attention to the difference in configuration from the first member 20a of the first embodiment, and the same components may be denoted by the same reference numerals and description thereof may be omitted.

FIG. 17 is a diagram illustrating an example of the configuration of the first member 20a-1 according to the second embodiment as viewed from the side. FIG. 18 is a diagram illustrating an example of the configuration of the first member 20a-1 of the second embodiment as viewed from the front.

In the present embodiment, a cylindrical hook portion 22a is provided at one end of the flexible portion 21 to constitute the attachment portion 23a. An axis 22b of the hook portion 22a extends in the Y direction. Similar to the first embodiment, the hook portion 22a may be provided as a separate member with respect to the flexible portion 21, or may be integrally formed. In the present embodiment, the flexible portion 21 and the hanging portion 22a are integrally formed by injection molding.

When the shape of the hanging portion 22a is a cylindrical shape as in the present embodiment, the hanging portion 22a and the inclined surface 33a are always in line contact in the process of mounting the first member 20a-1 on the second member 20b. There is an advantage that it becomes possible. For this reason, when the first member 20a-1 is attached, the hooking portion 22a moves backward (in the direction of the arrow on the Z axis) with a light force toward the rear (the direction opposite to the arrow on the X axis). It can be converted into force and can be installed smoothly.

In the present embodiment, an example in which the shape of the hook portion 22a is cylindrical in order to bring the hook portion 22a and the inclined surface 33a into line contact is shown. However, the present invention is not limited thereto, and the upper surface is a curved surface. It suffices to be configured. For example, the outer shape of the hook portion can be a semi-cylindrical shape so that the upper surface side of the hook portion 22a has an arc shape. In other words, the present invention is not limited to the example shown in FIG. 17, and the same effect as that of the present embodiment can be obtained as long as the surface in contact with the inclined surface 33 a is a curved surface when viewed from the side.

<Third Embodiment>
In the third embodiment, an example in which the configuration of the main body 31 is different in the second member 20b of the first embodiment will be described. Specifically, the case where the upper surface 31a of the main body 31 is configured by at least two surfaces intersecting each other will be described. In the present embodiment, description will be made by paying attention to the difference in configuration from the second member 20b of the first embodiment, and the same components may be denoted by the same reference numerals and description thereof may be omitted.

FIG. 19 is a diagram showing an example of a cross-sectional configuration of the second member 20b-1 of the third embodiment. As shown in FIG. 19, in the present embodiment, an inclined surface 31b is provided on a part of the upper surface 31a of the main body 31-1. At this time, as shown in the enlarged view of the region surrounded by the frame line 36, when the angle of the inclined surface 33a with respect to the insertion / extraction direction 40 of the mounting portion 23 is α1, and the angle of the inclined surface 31b is α2, α1 and α2 are The angles are different from each other with respect to the insertion / extraction direction 40 of the mounting portion 23, and α2 is larger than α1.

From another viewpoint, as shown in FIG. 19, it can be said that the upper surface 31a of the main body 31-1 is provided with a protrusion that forms the inclined surface 31b. The protrusion is provided so as to protrude upward from the upper surface 31a at the edge (side) where the groove 32 is provided in the edge of the first insertion hole 33. By this protrusion, the inclined surface 33a in the first insertion hole 33 extends upward. Further, although not shown in FIG. 19, the first insertion hole 33 is arranged with a predetermined length in the depth direction (Y-axis direction) along the edge.

The second member 20b-1 of the present embodiment is such that the inclined surface 31b is positioned between the hanging portion 22 and the entrance of the groove portion 32 in a state where the first member 20a is mounted on the second member 20b-1. An inclined surface 31b is provided. As a result, the inclined surface 31b supports the hanging portion 22 from the rear side (the first insertion hole 33 side) after the first member 20a is mounted on the second member 20b-1, and more effectively removes the first member 20a. Effect of deterrence. That is, it can be said that the inclined surface 31b included in the second member 20b-1 of the present embodiment is a surface that functions as a stop surface that works to prevent the first member 20a from falling off.

As described above, in the case of the mounting structure using the second member 20b-1 of the present embodiment, the first member 20a is more strongly detached from the second member 20b-1 after the first member 20a is mounted. It is possible to suppress.

<Fourth embodiment>
In the fourth embodiment, an example in which the configuration of the main body 31 is different in the second member 20b of the first embodiment will be described. Specifically, a case will be described in which the inclined surface 31b-1 is provided on a part of the upper surface 31a of the main body 31 (at least the position where the hanging portion 22 is mounted). In the present embodiment, description will be made by paying attention to the difference in configuration from the second member 20b of the first embodiment, and the same components may be denoted by the same reference numerals and description thereof may be omitted.

FIG. 20 is a diagram illustrating an example of a cross-sectional configuration of the second member 20b-2 of the fourth embodiment. As shown in FIG. 20, in the present embodiment, an inclined surface 31b-1 is provided on a part of the upper surface 31a of the main body 31-2. At this time, as shown in the enlarged view of the region surrounded by the frame line 37, if the angle of the inclined surface 33a with respect to the insertion / extraction direction 40 of the mounting portion 23 is α1, and the angle of the inclined surface 31b-1 is α3, then α1 α3 has a different angle with respect to the insertion / extraction direction 40 of the mounting portion 23, and α3 is larger than α1.

As shown in FIG. 20, on the upper surface 31a of the main body portion 31-2, the position where the hanging portion 22 is mounted is constituted by the inclined surface 31b-1, and therefore the first member 20a is compared with the second member 20b-2. In a state in which is mounted, the inclined surface 31b-1 functions to prevent the rearward movement of the hook portion 22 (the direction opposite to the arrow on the X axis). That is, it can be said that the inclined surface 31b-1 provided in the second member 20b-2 of the present embodiment is a surface that functions as a stop surface that works to prevent the first member 20a from falling off as a whole.

In this embodiment as well, as in the case of the third embodiment, the inclined surface 31b-1 has a predetermined length in the depth direction (Y-axis direction) along the front edge of the first insertion hole 33. May be arranged.

As described above, in the case of the mounting structure using the second member 20b-2 according to the present embodiment, the first member 20a is more strongly detached from the second member 20b-2 after the first member 20a is mounted. It is possible to suppress.

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.

In the above embodiment, the positioning member 25 is provided in the first member 20a and the second insertion hole 35 is provided in the second member 20b, but these are not necessarily required. Accordingly, the first member 20a and the second member 20b can be fixed by the mounting portion 23 of the first member 20a and the first insertion hole 33 of the second member 20b.

The shape of the hanging portion 22 is not particularly limited, and various forms are possible besides the claw shape and the cylindrical shape as shown in each of the above embodiments, and after the first insertion hole 33 is passed, the first member Any shape that can come into contact with the upper surface 31a of 20a may be used.

In the said embodiment, the 1st insertion hole 33 is formed in the 2nd member 20b, and the 1st member 20a and the 2nd member 20b are inserted by inserting the attachment part 23 of the 1st member 20a in this 1st insertion hole 33. However, the structure through which the attachment portion 23 passes in the second member 20b is not limited to this. For example, the second member 20b can be structured as shown in FIGS. 21 is a perspective view of the mounting structure, FIG. 22 is a side view of FIG. 21, and FIG. 23 is a plan view of FIG.

21 to 23, the side surface of the second member 20b includes a base surface 39 extending in the vertical direction and an inclined surface 33c extending from the upper end of the base surface 39. The inclined surface 33c is inclined in a direction away from the base surface 39 as it goes upward, and its upper end is connected to the upper surface 31a of the second member 20b. Further, a groove portion 38 extending in the vertical direction is formed on the inclined surface 33c, and this groove portion 38 is opened on the upper surface 31a of the second member 20b.

And in order to connect the 1st member 20a and the 2nd member 20b, as shown in FIG. 24, the attaching part 23 of the 1st member 20a is moved upwards along the side surface of the 2nd member 20b. And the hook part 22 of the attaching part 23 is pressed in the direction which leaves | separates from the base surface 39 by moving along the inclined surface 33c, and the flexible part 21 bends back in connection with this. Then, when the hanging portion 22 reaches the upper surface 31a of the second member 20b beyond the inclined surface 33c, the pressing by the inclined surface 33c is released. As a result, the flexible portion 21 that has been bent is restored to its original shape, that is, extends in the vertical direction, and is fitted into the groove portion 38. As a result, the hook portion 22 is engaged with both sides of the groove portion 38 on the upper surface 31a of the second member 20b, and the attachment portion 23 is restricted from coming out downward. In this way, the first member 20a is fixed to the second member 20b so as not to come out downward.

Therefore, the attachment portion 23 of the first member 20a does not necessarily have to be an insertion hole, but may be a side surface as shown in FIGS. A space including the side surface and through which the attachment portion 23 passes corresponds to the passage of the present invention.

In the above embodiment, the mounting structure of the present invention is used for fixing a key and a frame in a keyboard instrument, but the present invention is not limited to this. That is, the present invention can be appropriately applied to a structure that is required to fix two members by so-called snap fit.

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 portion, 183 .. key side support portion, 185... Structure including a rod-like flexible portion, 185 a. ... 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 section, 710 ... Signal conversion section, 730 ... Sound source section, 750 ... Output section, 185a ... Flexible rod section, 20 ... Mounting structure, 20a ... First member, 20b ... Second member, 21 ... flexible part, 22 ... hanging part, 23 ... attachment part, 25 ... positioning part, 27 ... connecting part, 31 ... main body part, 31a ... upper surface, 32 ... groove part, 33 ... first insertion hole, 33a ... inclined surface, 35 ... 2nd insertion hole, 36, 37 ... Frame line

Claims

A first member having an attachment portion;
A second member on which the first member can be mounted;
With
The attachment part has a flexible part extending in one direction and a hook part provided at one end of the flexible part,
The second member has a passage through which the attachment portion passes, and an inclined surface that is inclined with respect to a passage direction of the attachment portion is formed on a wall surface of the passage.
An attachment structure in which a part of the flexible part enters a groove provided in the inclined surface and the inclined surface is positioned below the hooking part in a state where the first member is attached to the second member. .
The attachment structure according to claim 1, wherein in a state where the first member is attached to the second member, a passing direction of the attachment portion substantially coincides with a longitudinal direction of the flexible portion.
2. The mounting structure according to claim 1, wherein the inclined surface functions to move the hook portion away from a mounting position in a process of mounting the first member on the second member.
The mounting structure according to claim 1, wherein the inclined surface functions to guide the hooking portion above the groove portion when the first member is attached to the second member.
2. The mounting structure according to claim 1, wherein when the first member is attached to the second member, the hooking portion is configured to slide on the inclined surface.
The mounting structure according to any one of claims 1 to 5, wherein a width of the groove portion is wider than a width of the flexible portion and narrower than a width of the hook portion.
The state in which the first member is attached to the second member, the hook portion is in contact with the second member at at least two places sandwiching the groove portion. Mounting structure.
8. The upper surface of the second member includes a stop surface that works to prevent the first member from falling off in a state where the first member is attached to the second member. The mounting structure described.
The mounting structure according to claim 8, wherein the stop surface is a surface that is inclined with respect to the insertion / extraction direction of the mounting portion at an angle different from that of the inclined surface.
The state according to claim 8 or 9, wherein, in a state where the first member is attached to the second member, the hook portion is disposed above the groove portion, and the stop surface is disposed below the hook portion. Mounting structure.
11. The flexible portion according to claim 1, wherein the flexible portion has a lower flexibility in a direction orthogonal to the pressing direction than a flexibility in a pressing direction in which the hook portion is pressed by the inclined surface. The mounting structure described in the section.
The mounting structure according to any one of claims 1 to 11, wherein the passage is configured by an insertion hole penetrating the second member, and the inclined surface is formed on an inner wall surface of the insertion hole.
Frame,
Multiple keys,
The mounting structure according to any one of claims 1 to 12,
With
The plurality of keys are attached to the frame using the attachment structure,
A keyboard device in which a longitudinal direction of the groove matches a scale direction of the key.