JP4329768B2 - Key structure - Google Patents

Description

  The present invention relates to a key structure applied to a key having a wood part.

  Conventionally, wood has been adopted for a key structure that functions as a key in order to improve texture. As a wooden key structure, for example, a wooden key for an acoustic piano is often used because of its availability (see Patent Documents 1 and 2 below).

In general, the key structure has a key function such as a key fulcrum part, a driving part for driving other elements such as a mass body and a key switch, and a guided mechanism part for being guided by a key operation guide. Parts are provided.
Japanese Patent Laid-Open No. 05-313656 JP 2000-99026 A

  However, in the above-described conventional key structure, the key fulcrum part, various drive parts, and the mechanism part are also configured by processing the wood part, so the degree of freedom in design regarding their function and shape is low, and the processing accuracy is low. However, since there are many inferior restrictions, there is a problem that it is not easy to secure a highly accurate key function.

  The present invention has been made to solve the above-described problems of the prior art, and an object thereof is to increase the degree of freedom of design of the key function unit and to facilitate a high-precision key function while giving a wooden texture to the key. An object of the present invention is to provide a key structure that can be secured.

Key structure according to claim 1 of the present invention in order to achieve the above object, the upper plate portion and the connecting portion substantially parallel to the lower plate portion on the upper plate portion and a solid wood that provides the key operation surface A key structure having a key body, wherein the upper plate portion and the lower plate portion are connected by the connecting portion, and the upper plate portion, the lower plate portion, and the connecting portion have a cross-section H. The lower plate portion includes a guided mechanism portion to be guided by the key operation guide, an actuator for driving the key switch, a mass body driving portion for driving the mass body, and a keyboard device. At least one of the key drop prevention mechanism portions for preventing the dropout from being removed is integrally formed, and the wood portions are provided on both left and right sides of the connecting portion, and the left and right wood portions are respectively provided on the lower surface of the upper plate portion. The key is fixed to the upper surface of the lower plate portion and the side surface of the connecting portion. The key body is configured so that the upper plate portion, the lower plate portion, the connecting portion, and the left and right wooden portions are integrated. And

  According to the present invention, it is possible to easily secure a high-precision key function by increasing the degree of freedom in designing the key function unit while giving a wooden texture to the key.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view of a keyboard device including a key structure according to a first embodiment of the present invention.

  The key structure 100 functions as a key, and the figure shows a cross section cut between the B key and the C key. Therefore, in the figure, the right side view of the key structure 100 that is the B key is shown from the viewpoint of the player. The key structure 100 is applied to the white key, but may be applied to the black key. Hereinafter, the player side of the keyboard device and the key structure 100 is referred to as the front.

  The key structure 100 is configured by integrally coupling a key base body 40 (key function member) and a key body part BOD, and the key body part BOD is composed of an upper plate body 50 and a wooden wood part 60. The upper plate body 50 is formed by integrally forming a front portion 50a and an upper plate portion 50b that provides a key operation surface with resin. The wood portion 60 has substantially the same length as the upper plate portion 50b of the upper plate body 50, and is bonded to the upper plate portion 50b and the front portion 50a so as to be coupled to the upper plate body 50, thereby the key body. Part BOD is configured.

  The key base body 40 is formed by integrally forming a base end portion 40a and an extending portion 40b extending forward from the base end portion 40a with a resin member. A keyed guide part 42 (guided mechanism part), a mass body drive part 43, a key actuator 44 (switch drive part), and a key drop prevention mechanism part 45, which are key function parts, are integrally formed. The extending portion 40b extends to the front portion 50a of the upper plate 50 substantially parallel to the longitudinal direction of the key body portion BOD. The proximal end portion 40 a also corresponds to the rear end portion of the key structure 100. A rotation fulcrum 41 is provided at the rear part of the base end portion 40a, and the key structure 100 is rotatable in the vertical direction around the rotation fulcrum 41. A sliding member 46 for securing smooth sliding is attached to the lower end portion of the mass body driving unit 43.

  On the other hand, below the key structure 100, mass bodies 71 are disposed corresponding to the key structures 100. The driven portion 71 a of the mass body 71 is driven by the sliding member 46 via the mass body driving portion 43 of the key base body 40 in accordance with the key pressing operation. As a result, the mass body 71 rotates about the mass body rotation shaft 72, so that an appropriate key pressing feeling is given. The keyboard device is also provided with a two-make first key switch 73 and a second key switch 74, respectively. The first key switch 73 is pressed and driven by the key actuator 44 of the key base body 40 to detect a key operation. The second key switch 74 is pressed and driven by a key actuator 71b provided on the mass body 71 to detect a key operation. Since the key switches 73 and 74 detect key operations including off-touch at different timings, various musical tone controls are possible based on these detection results.

  The keyboard device is also provided with a key operation guide 75 and an engaging portion 77. The keyed guide portion 42 of the key structure 100 is guided by the key operation guide 75 at the time of key operation, whereby the key structure 100 swings in the key arrangement direction (the left and right direction of the key structure 100). It is suppressed. The key drop prevention mechanism part 45 engages with the engagement part 77 to prevent the key structure 100 from dropping mainly forward during key operation.

  FIG. 2 is a view showing a cross section at each position of the key structure 100. (A)-(f) is sectional drawing which follows the AA line-FF line | wire of FIG. 1, respectively. Since FIG. 2 illustrates the B key, the key structure 100 has a width for arranging the adjacent black key (G # key). In (f), the left side (side surface 100a side) viewed from the player is narrow.

  As shown in FIG. 2A, the key structure 100 is configured such that the wood portion 60 is sandwiched between the upper plate portion 50 b of the upper plate body 50 and the key base body 40. On the upper part of the extension part 40b of the key base body 40, a protrusion 40c is formed from the front part to the vicinity of the connection part between the extension part 40b and the base end part 40a. In addition, the wood portion 60 is formed with a groove-like recess 60c that is shaped to fit to the protrusion 40c. And, first, after creating the key body part BOD, the protrusion 40c of the extending part 40b is fitted into the groove-like recessed part 60c of the wooden part 60, and the wooden part 60 and the extending part 40b are bonded, A key structure 100 is configured.

  The wood part 60 plays a role of imparting a wood texture to the key structure 100. That is, when a key is pressed, a part of the side surface of the key adjacent to the key is visible to the player, but the wooden part 60 is arranged on the side surfaces 100a and 100b of the key structure 100. The side surfaces 60a and 60b of the key structure 100 are visually recognized, and it looks as if the key structure 100 is made of wood except for the upper surface and the front surface. Thereby, a wood texture is given to the key structure 100 and a high-class feeling is given.

  Further, as shown in FIG. 1, the keyboard device is provided with a panel portion 76 above the key structure 100. The panel unit 76 includes various operators and a display unit (not shown), and also serves as a blindfold that blinds the rear portion. Here, in the wood part 60, since the key body part BOD is extended to the rear from the panel part 76, the boundary between the key body part BOD and the base end part 40a of the key base body 40 cannot be seen by the player. The appearance has been improved.

  According to the present embodiment, the side surfaces 60a and 60b, which are the wood surfaces of the wood portion 60, are arranged on the side surfaces in the longitudinal direction of the key body portion BOD. The In addition, the long key body part BOD and the key base body 40 can be operated integrally, and the extended part 40b of the key base body 40 is formed substantially parallel along the longitudinal direction of the key body part BOD. Further, since the key function part that functions as a key, such as the keyed guide part 42, is integrally formed in the extended part 40b, a wooden key is adopted and the wood function part is used for the key function part as in the past. Compared with the case of machining, since the degree of freedom in design regarding these functions and shapes is high and the machining accuracy is also excellent, it is easy to ensure a highly accurate key function. Therefore, it is possible to easily secure a high-precision key function by increasing the degree of freedom in designing the key function unit while giving a wood texture to the key.

  In addition, since the key base body 40 is made of resin, the degree of freedom in design, durability, and wear resistance including the key function portion can be improved, and higher accuracy of the key function can be maintained over a long period of time. Can do. Furthermore, since the wooden part 60 is in a so-called jammed state in the key structure 100, high rigidity is ensured.

  The configuration of the key structure 100 is not limited to that illustrated.

  FIG. 3 is a diagram illustrating a modification of the key structure. The same figure (a)-(d) shows sectional drawing corresponding to Drawing 2 (a) of this modification.

  For example, in the example of FIG. 3A, portions corresponding to the upper plate portion 50 and the key base body 40 are integrally formed of resin. That is, the upper plate portion 10a and the lower plate portion 10c are connected by the connecting portion 10b, and the cross-sectional shape is a shape in which “H” is laid sideways. In this example, the wood part is divided into wood parts 20L and 20R, and is arranged on both sides of the connecting part 10b to constitute a key structure.

  Moreover, in the example of FIG.3 (b), while providing the protrusion part 31a toward the downward direction from the resin upper board part 31, the connection part 32a and the lower board part 32b are integrally formed with resin, and a connection part is formed. A groove-like recess 32aa that fits into the protrusion 31a is provided on the upper portion of 32a. Then, the protruding portion 31a of the upper plate portion 31 is adhesively fitted to the recess portion 32aa of the connecting portion 32a, and the wood portions 20L and 20R are disposed similarly to the example of FIG. A structure is constructed.

  Moreover, as shown in FIG.3 (c), you may form integrally with resin so that the upper board part 33a and the lower board parts 33d and 33e may be connected by the two connection parts 33b and 33c. In this case, a recess 35 is formed between the connecting portions 33b and 33c. Then, the wood parts 34L and 34R thinner than the wood parts 20L and 20R are disposed outside the connecting parts 33b and 33c, thereby forming a key structure.

  Further, as shown in FIG. 3 (d), a wood structure 37 is sandwiched from the upper and lower directions between the upper plate portion 36 and the lower plate portion 38 made of resin, and bonded to form a key structure integrally joined. May be.

(Second Embodiment)
FIG. 4 is a side view showing the configuration of the key structure according to the second embodiment of the present invention.

  In the first embodiment, the key structure 100 is composed of a key base body 40 and a key body part BOD, and the key body part BOD is composed of an upper plate body 50 and a wood part 60. The key base body 40 has an extended portion 40b extending from the base end portion 40a, and the “key function portion” is formed integrally with the extended portion 40b.

  On the other hand, in the second embodiment of the present invention, the key body part BOD2 includes a key base body 140 and a wood part 160. The “key function unit” is formed integrally with the key base body 140.

  That is, a rotation fulcrum 140b is provided at the rear of the base end portion 140a of the resin key base body 140, and the upper plate portion 140c extends from the base end portion 140a to the front. From the upper plate portion 140c, in addition to the front portion 140d, a keyed guide portion 140e, a mass body driving portion 140f, a key actuator 140g, and a key drop prevention mechanism portion 140h are respectively provided downward as a wood portion 160. Is penetrating through. The wooden part 160 of the wood is bonded to the lower part of the upper plate part 140c substantially in parallel with the upper plate part 140c.

  In the present embodiment, the upper plate portion 140c serves as both the “key body portion” and the “key function member”. However, according to the present embodiment, the wood portion 160 is provided on the side surface in the longitudinal direction of the key body portion BOD2. Since the key function part is formed integrally with the upper plate part 140c of the key base body 140, the wood texture is given to the key and the degree of freedom in designing the key function part is increased. The same effects as those of the first embodiment can be achieved with respect to easily ensuring a high-precision key function.

  The arrangement of the wood part may be similarly applied to the black key. In the first embodiment, the wooden parts 60 are arranged on both side surfaces of the key structure 100. However, the wooden parts 60 may be provided only in the parts that are visually recognized when the keys are operated. That is, in the first embodiment, the wood part 60 is disposed from the front part to the rear part of both side surfaces of the key structure 100 for the all white key, but from the viewpoint of reducing the cost while maintaining the wood texture. May be arranged only in the portion where the black key is not adjacent to the both side surfaces of the key structure 100 for the white key. This may also be applied to the second embodiment.

  From the viewpoint of providing a wood texture, the wood part may be a wood-based material, not wood, for example, a wood-tone decorative board (including printing, coating, painting, attached board, etc.), plywood, wood You may employ | adopt material (MDF) etc.

  Although the key base body 40 is made of resin, other materials can be used as long as the material can maintain the durability and performance of the key function part such as the key guide part 42 formed integrally and can be easily processed. For example, you may comprise with a metal. Moreover, it is not always necessary to form all the key function units integrally with the key base body 40, and the key function units may be applied only to some key function units.

It is sectional drawing of the keyboard apparatus containing the key structure which concerns on the 1st Embodiment of this invention. It is a figure which shows the cross section in each position of a key structure. It is a figure which shows the modification of a key structure. It is a side view which shows the structure of the key structure which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 Key structure, 42 Keyed guide part (a part of key function part), 43 Mass body drive part (a part of key function part), 44 Key actuator (a part of key function part), 45 Key drop prevention mechanism Part (a part of the key function part), 10a, 31 upper plate part, 10c, 32b lower plate part, 10b, 32a connecting part, 20L, 20R wood part

Claims (2)

A key structure comprising a key body made of an upper plate portion and the connecting portion and a solid wood substantially parallel to the lower plate portion on the upper plate portion that provides a key operating surface,
The upper plate portion and the lower plate portion are connected by the connecting portion, and the upper plate portion, the lower plate portion, and the connecting portion are configured in a cross-sectional H shape,
The lower plate portion is guided by a key operation guide, an actuator for driving a key switch, a mass body driving unit for driving a mass body, and preventing falling off from a keyboard device. At least one key captive portion for but are formed integrally,
The wood portions are provided on both left and right sides of the connecting portion, and the left and right wood portions are fixed to the lower surface of the upper plate portion, the upper surface of the lower plate portion, and the side surfaces of the connecting portion, respectively. It is arranged so that it can be seen on both left and right sides in the longitudinal direction of
The key body is characterized in that the upper plate portion, the lower plate portion, the connecting portion, and the left and right wood portions are integrally formed.   2. The key structure according to claim 1, wherein the key body has a solid portion in which the upper plate portion, the lower plate portion, the connecting portion, and the left and right wood portions are integrated. .

Images