CN1024051C - Keyboard device of musical instrument - Google Patents

Abstract

The present invention relates to a keyboard device of a musical instrument such as an electronic piano, a keyboard of an electronic organ or an acoustic keyboard, the keyboard device has a musical instrument case, a plurality of keys assembled on the musical instrument case (1) and a key mounted on the musical instrument case The manipulation panel, the key covering member for covering the base ends of the plurality of sets of keys are integrally injection-molded with one edge of the manipulation panel, so the number of parts is reduced, and the assembly is easy and low cost.

Description

The present invention relates to a keyboard device of an electronic musical instrument, such as an electronic musical instrument keyboard for an electronic piano or an electronic organ.

In an electronic keyboard such as an electronic piano, an electronic organ or an electronic synthesizer, a plurality of key sets consisting of white keys and black keys are mounted on a musical instrument body (hereinafter referred to as "instrument case") in a predetermined arrangement. The keys are housed in the case such that each key rotates in a vertical direction around each base end portion as a rotation axis.

In such electronic musical instrument keyboard devices, there are many ways of installing keys in the musical instrument case. In the first mounting method, the base end portion of each key is mounted directly from the upper surface side of the musical instrument case with the front plate integrally molded therewith. In the second mounting method, the base end of each key is first attached to the keyboard chassis as another part. The keyboard chassis is then installed from the side of the lower surface in an instrument case with an integrally molded front panel for exposing the keys on the instrument case.

In the foregoing first mounting method, the base end portions of the keys can be mounted from the musical case front surface side on the musical case, and therefore, the mounting work is simple and easy. However, since the mounting structure of the base end portion of the key is exposed outside the instrument case, its appearance is defective, and therefore, this musical instrument particularly needs a covering member for covering the mounting structure of the base end portion of the key, and the covering member increases The number of parts of the keyboard device, and thus the cost, is increased.

In the following second mounting method, the mounting structure of the base end portion of the key is mounted in the musical instrument case, and therefore, the mounting structure is not exposed outside the musical instrument case. However, the work of installing such a keyboard chassis as another part on the side of the rear surface of the musical instrument case causes trouble in assembling the keyboard unit. The keyboard chassis increases the part count and thus the cost of the keyboard assembly.

A keyboard device having a plurality of groups of keys, each of which is integrally molded by synthetic resin, is disclosed, for example, Japanese patent applications of published unexamined Nos. 64-91186 and 64-91187 and U.S. patent USP Nos. 3,205,754 and 3,797,357, in this keyboard device, the number of assembly steps and parts directly related to multiple groups of keys is reduced to a certain extent, but the number of parts of an integral keyboard device and the number of assembly steps One reduction is not enough.

The present invention has been devised in view of the above description, and an object of the present invention is to provide a keyboard device in which the mounting structure of the keys to the base end portion of the instrument case is not exposed outside the instrument body.

Another object of the present invention is to provide a keyboard device in which assembly work is sufficiently improved and the number of parts is reduced.

In order to achieve the purpose of the present invention described above, according to the present invention, the keyboard device includes: a musical instrument body; connected keys and a manipulation plate mounted on said instrument body, which plate is used to cover the base end portion of said key and the instrument body; and an edge of said manipulation plate, which covers the key all The body mold is formed by injection, and the covering part is used to cover the base end part where the key is connected with the musical instrument body.

In a structural example of the present invention, base ends of a plurality of groups of keys are connected to the instrument body, and then a manipulation panel is connected to the instrument body, and the manipulation panel is integrally injection-molded with the keyboard cover. The manipulation plate can be directly attached to the instrument body from the upper surface so that the key covering portions cover the base end portions of the keys. Therefore, the assembly work of the keyboard device can be performed simply and easily, and the key cover portion integrally molded with the manipulation board covers the keys while the manipulation board is mounted on the instrument body for preventing the mounting structure from being exposed to the instrument body. Base end installation structure. The appearance of the keyboard structure is thus improved. The integral injection molding of the key cover portion and the manipulation panel reduces the number of parts of the keyboard device.

In another structural example of the present invention, the control panel is integrally molded together with the key cover part and the speaker fixing part. The cover part is used to cover the installation structure of the base ends of multiple sets of keys. The loudspeaker and the control panel are fixed on the instrument body. Therefore, a separately formed key cover is not necessary, and when a plurality of types of switches are mounted on the operation panel, the speaker is simultaneously mounted on the speaker mounting member, so that the speaker mounting work can be simply and easily performed.

In a further structural example of the present invention, the control plate, which is integrally molded together with the tone cartridge of the key cover part, is fixed on the instrument body, and the cover part is used to cover the installation structure of the base ends of multiple sets of keys. , the tone card box is used for holding tone cards. Therefore, a separately formed key cover part is not particularly required. When various types of switches are mounted on the control panel, electrical components such as connectors can be connected to the music cartridge at the same time, so the connection work of connecting the electrical components of the connector to the control panel can be done simply and quickly. .

In another structural example of the present invention, the control panel integrally injection-molded with the key cover part, the tone cartridge and the loudspeaker fixing part is mounted on the musical instrument body, and the cover part is used to cover the base ends of the plurality of groups of keys. The installation structure of the present invention is that the tone card box is used for accommodating the tone card, and the speaker is installed on the speaker installation part. Therefore, the key cover part formed separately is not particularly required, so electrical components, such as connectors, can be easily and quickly connected to the tone cartridge and when various types of switches are mounted on the operation panel, the speaker can be easily and quickly installed on the speaker mounting parts.

That is to say the present invention proposes a keyboard device comprising a musical instrument case (1), a plurality of sets of keys (12, 15, 18, 131), which are detachably connected to the musical instrument case at their base ends (11, 14, 17) (1), and a manipulation plate (5) mounted on said instrument case to cover the base ends (11, 14, 17) of said keys fitted to the instrument case (1), said manipulation plate ( 5) one side edge is integrally molded together with a key cover (41), and this cover (41) is used to cover the base ends (11, 14, 17);

The sets of keys (12, 15, 18, 131) are mutually molded at their base ends (11, 14, 17);

The control panel (5) is detachably mounted on the musical instrument case (1);

The control panel (5) is integrally molded together with the musical instrument case (1) through a book elastic part (105), and the book elastic part (105) is formed at a peripheral edge position of the musical instrument case, and the edge is located at the same the side opposite the base end portion (11, 14, 17) of the key;

The loudspeaker fixing part (43) for fixing the loudspeaker (44) is further integrally molded together with the control panel (5);

The tone card box (61) for holding the tone card is further integrally molded together with the control panel (5);

The speaker fixing part (43) of the fixable speaker (44) and the tone card box for accommodating the tone card (63) are further integrally injection molded together with the control panel (5).

Additional objects and advantages of the invention will be set forth below. Some of these will be obvious from the description or may be acquired from practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the claims.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate several presently preferred embodiments of the invention and, together with the foregoing general description and the following detailed description of the preferred embodiments, serve to clarify the gist of the invention.

Fig. 1 is the three-dimensional exploded view showing the main part of the electronic musical instrument keyboard device according to the first embodiment of the present invention;

Fig. 2 is a plan view representing the electronic musical instrument keyboard device in Fig. 1;

Fig. 3 is a sectional view along III-III of Fig. 2;

4 is an exploded perspective view of a main body of an electronic musical instrument keyboard device according to a second embodiment of the present invention;

Fig. 5 is a plan view showing the electronic musical instrument keyboard device shown in Fig. 4 .

Fig. 6 is a sectional view along VI-VI of Fig. 5 .

Fig. 7 is a three-dimensional exploded view showing a main part of an electronic musical instrument keyboard device according to a third embodiment of the present invention;

Fig. 8 is a plane showing the electronic musical instrument keyboard device of Fig. 7 picture;

Fig. 9 is a sectional view along IX-IX of Fig. 8;

Fig. 10 is a sectional view along X-X of Fig. 8 part;

Fig. 11 is a three-dimensional exploded view showing a temporary attachment column of the manipulation panel of the electronic musical instrument keyboard device of Fig. 7;

Fig. 12 is a sectional view showing part of Fig. 8 along XII-XII;

Fig. 13 is a three-dimensional exploded view showing another temporary attachment column of the manipulation panel of the electronic musical instrument keyboard device of Fig. 7;

Fig. 14 is a bottom view showing an example of a dry battery box fixed on the control panel;

Fig. 15 is a sectional view along XV-XV of Fig. 14;

Fig. 16 is a cross-sectional view showing another example of a dry battery box fixed on the control panel;

Fig. 17 is a longitudinal sectional view showing a main part of a keyboard device according to a fourth embodiment of the present invention;

Fig. 18 is a longitudinal sectional view showing a main part of a keyboard device according to a fifth embodiment of the present invention.

Various embodiments and modifications of the present invention will be described in detail below with reference to the accompanying drawings.

1 to 3 schematically show the main body of a first embodiment of an electronic musical instrument keyboard device according to the present invention.

In this electronic musical instrument keyboard device, as shown in FIGS. Containing one type and made of synthetic resin, these white and black key groups are mounted on the front half of the upper surface of the musical instrument case 1 in a predetermined order, and a manipulation panel 5 made of synthetic resin is mounted on the musical instrument case 1 On the rear half of the surface, the musical instrument case 1 is made of synthetic resin and constitutes the musical instrument body.

Each set of white keys 2 of two types of a plurality of sets of white keys has four white keys 12 for the designated tones C, E, G and B. The four white keys 12 are integrally molded together with the common mounting bar 11 (FIG. 1), so that the four white keys are connected to the common mounting bar 11 through the thin elastic member 13. Between adjacent two of the four white keys there is a gap corresponding to the width of the white key. Another type has three or four white keys 15 of the nominal tones D, F and A or D, F, A and C per group of white keys 3 . These three or four white keys 15 are integrally molded together with a common mounting bar 14 which has the same length as the common mounting bar 11 of the previous type of white key set 2 and passes through a thin elastic member 16. , the common installation bar 14 is connected with the white key group 3 . Between adjacent two of the four or three white keys there is a gap corresponding to the width of the white key. Each black key group 4 has five black keys 18 respectively labeled with the tones C ^# , D ^# , F ^# , G ^# and A ^# . These 5 black keys 18 are integrally molded together with the common mounting bar 17, which has the same length as the mounting bar 11 of the white key group 2 of the previous class, and passes through the thin elastic member 19 (Fig. 3 ) The black key 18 is connected to the common installation bar 17.

When the above-described key groups 2 to 4 are installed at predetermined positions of the musical instrument case 1 , the common mounting bar 17 of each black key group 4 is mounted at predetermined positions on the upper surface of the musical instrument case 1 . Then, the shared mounting bar 14 of the white key group 3 of one of the two white key types is stacked on the predetermined position on the upper surface of the shared mounting bar 17 of the black key group 4, and another type of white key described above The common installation bar 11 of the key group 2 is stacked on the upper surface of the common installation bar 14 of the white key group 3 at a predetermined position. The white keys 12, 15 and black keys 18 that form an octave are installed in a pre-arranged row. The screw screw-in holes (not shown among the figures) on the mounting strips 11, 14 and 17 coincide with each other. When the screw 20 is inserted into the screw insertion hole overlapping with each other and screwed into the threaded hole (not represented among the figures) formed on the instrument case 1, the white key group 2, 3 and black key group 4 forming an octave are contained in the On the instrument case 1. Note that black key set 4 can provide two octaves instead of one. In this case, the two common mounting bars 11 of the two white key sets 2 of the same type are mounted on the common mounting bar 17 of the black key set 4, each white key set of the same type for one octave interval, the black key group 4 is used for two octaves. And two shared mounting bars 14 of two white key groups 3 of another type are stacked on it, and each white key group of this type is used for an octave.

The keys of each key group 2, 3 and 4 will be described as represented by the black key 18, and the description of the white keys 12, 15 will be omitted.

As shown in FIG. 3 , each black key 18 has a cross-section pressure switch protrusion 21 at the center of the lower surface. Push-button automatic recovery type rubber switch (referred to as rubber switch hereinafter) 22 is contained under pressure switch projection 21. Rubber switch 22 is contained on the annular plate 24, and this annular plate is fixed on the inner surface of musical instrument case 1 with screw 23, passes through the through hole 25 in the musical instrument case 1 like this, and rubber switch 22 stretches out from the musical instrument case upper surface. The black key 18 is pressed up tightly by the resilience of the thin elastic part 19 on the base end and the restoring force of the rubber switch 22. The maximum upward movement position of the black key 18 (the initial position before the key is pressed) is limited by the L-shaped hook 27 which forms the front lower end of the side plate 26 of the black key 18 and protrudes downward through the formed The through hole 28 on the instrument case, and then contacts with the bar-shaped upper limit stopper 29, and this upper limit stop block 29 is made of such as felt or similar material, and is installed in the interior of the instrument case 1. On the surface, adjacent to the through hole 28; the strip-shaped lower limit stopper 31, for example made of felt or similar felt, is installed on the upper surface of the instrument case 1, and this position is located at the same position as the upper limit stopper 29. Correspondingly, when the black key rotates downward from the above-mentioned initial position under the guidance of the key guide rod 30, the lower end of the side plate 26 of the black key 18 touches the lower limit stop block, and the lower limit stop block 31 limits the black key. Maximum downward movement position of key 18. A reinforcing rib 32 and a post 33 with a threaded hole are formed to protrude downward in a region of the inner surface of the instrument case 1 , and the reinforcing rib 32 and post 33 are placed around the annular plate 24 . A lower cover 34 made of metal plate is attached to the protruding end of the post 33 by screws 35 . The legs 36 are integrally molded with the musical instrument case 1 at multiple positions on the lower surface of the musical instrument case 1 .

The manipulation panel 5 will now be described in detail below.

As shown in Fig. 1 and Fig. 2, operating panel 5 has key covering portion 41, and this portion 41 is in the whole area of its front end, also has the recessed portion 42 (not showing among the figure) of two music scores at its rear end. The control panel 5 also has speaker mounting posts 43 (as shown in FIG. 3 ). Posts 43 with threaded holes are located at various positions on the left end in FIG. 1 , and speakers 44 are mounted on the speaker mounting posts 43 by screws 45 . A portion of the operation panel 5 has a sound hole 44a for allowing the sound generated from the speaker 44 to diffuse, and the hole is located opposite to the speaker 44. As shown in FIG.

As shown in Figure 3, when the manipulation panel 5 was installed in the instrument case 1, screws (not shown) were screwed into the manipulation panel 5 from the rear surface side of the instrument case 1, so that the key cover 41 was installed on the key. Stacks of groups 2, 3, and 4 share common mounting strips 11, 14, and 17.

As shown in Figure 2, the slide button 51 in the slide switch group and the switch buttons 52 of many push-button switches are installed on the upper surface of the manipulation panel 5 in a predetermined order, and these slide-type and push-button switches are electrically connected with the main ring A plate (not shown in the figure) is connected, and this plate is contained in the protruding end surface of a downwardly protruding support column with a threaded hole, which is formed on the inner surface of the manipulation plate 5. The annular plate 24 housing the rubber switches 22 is also electrically connected to the main annular plate. A group of dry batteries 54 supply electric current to the main annular plate, and this dry battery group is packed in the dry battery box 53, and this dry battery box 53 is formed by the two side walls that protrude downward from the predetermined position of the inner surface of the control panel 5. Formed, the two side walls are arranged parallel to each other, as shown in FIG. 1 .

According to the electronic musical instrument keyboard device constructed in the first embodiment as described above, when the keys 12, 15 and 18 are pressed against the elastic force of the thin elastic members 13, 16 and 19 and the elastic force of the rubber switch, the pressure switch protrudes. The block 21 squeezes the corresponding rubber switch 22, and the pressed rubber switch 22 is opened due to elastic deformation, and at the same time, the above-mentioned main annular disc (not shown) sends a prefabricated sound corresponding to the pressed button from the speaker 44. Press the rubber switch 22 tones. When the pressure applied to the pressed keys 12, 15 and 18 disappears, the keys 12, 15 and 18 return to their original positions due to the elastic restoring force of the thin elastic members 13, 15 and 19 and the elastic restoring force of the rubber switch 22. , while the rubber switch 22 recovers from the elastically deformed state and is turned off.

In the electronic musical instrument keyboard device, the common mounting bars 11, 14 and 17 of the key groups 2, 3 and 4 can be directly installed on the musical instrument case 1 from the upper surface side, and one octave of the keyboard is composed of 3 key groups, Or the two octaves of the keyboard are made up of 5 key groups. Therefore, the installation work of the keys in the musical instrument case 1 can be performed simply and easily. By installing the manipulation panel 5 at the instrument case 1, the key cover portion 41 of the manipulation panel 5 is installed above the thin elastic members 13, 16 and 19 of the key groups 2, 3 and 4 and their shared mounting strips 11, 14 and 17, so that Cover thin elastic members 13, 16 and 19 and common mounting strips 11, 14 and 17. This avoids the need for separate dedicated covering parts for covering the thin elastic parts 13, 16, 19 and the common mounting strips 11, 14 and 17.

4 to 6 show a main part of an electronic musical instrument keyboard device according to a second embodiment of the present invention. In these figures, the same numerals as those in Fig. 1 to Fig. 3 in the first embodiment are used to designate the same or equivalent parts as those in the first embodiment, and the detailed description of these parts will be is omitted.

In the electronic musical instrument keyboard device in the second embodiment, a tone cartridge is integrally molded with the manipulation panel 5 in FIGS. 4 and 5 , and it is located at the right rear end of the manipulation panel 5 . The tone card cover 61 has an opening on the manipulation panel 5, and this opening is covered by an openable cover 62. The tone card 63 is removably placed in the opening, and tone information such as harmony, auxiliary performance, and chords are stored in the tone card.

7 to 9 show an electronic musical instrument keyboard device according to a third embodiment of the present invention. In these figures, the same numerals as those in Figs. 1 to 3 of the first embodiment are used to designate the same or equivalent parts as those in the first embodiment, and the detailed description of these parts will be is omitted.

In the third embodiment, in order to simplify the installation of the manipulation panel in the musical instrument case 1, the manipulation panel 5 can be temporarily attached to the musical instrument case 1 during the above-mentioned installation work.

The manipulation panel 5 in this embodiment has temporary attachment pegs 143 and 144 at two positions, one right and one left, on the inner surface thereof. as shown in the picture 10 and 11, a rectangular opening 145 is formed at the position corresponding to the temporary attachment column 143 on the left side of the musical instrument case 1, and the slit 146 is opened at the outer sides of a pair of short edges of the opening 145. A pair of musical instrument cases 1 The bridge-shaped section 147 constitutes a pair of spring members, and the bridge-shaped section 147 is formed between a pair of short sides of the rectangular opening 145 and a pair of elongated openings 146. The distance between a pair of short sides of the rectangular opening 145 is slightly smaller than the outer diameter of the left temporary attachment peg 143, as shown in FIGS. There is an upwardly directed post 148 with a hole. The opening of the convex end surface of the post 148 is rectangular and the distance between a pair of short sides of the opening is slightly shorter than the outer diameter of the right temporary attachment plug 144 .

When the manipulation panel having the above-mentioned configuration is installed in the musical instrument case 1, the left temporary attachment bolt 143 is press-fitted into the opening 145 against the elastic force of the pair of bridge sections 147, and the right temporary attachment bolt 144 is press-fitted. fit into openings on the protruding surface of the post 148 so that the key covering member 41 is mounted over the common mounting bars 11, 14 and 17 of the keysets 2, 3 and 4.

In this state, even when the instrument case 1 is mounted with its rear surface facing upward, the manipulation panel 5 does not fall from the instrument case. In order to fix the control panel 5 on the instrument case 1, screwing the screws into the overhanging rear surface of the instrument case becomes more convenient. When the manipulation board 5 is fixed on the instrument case 1, the protruding end surface of the wall part 149 formed by protruding downward at a predetermined position of the inner surface of the manipulation board 5 is in the same position as the upper surface of the common mounting bar 11 of the white key group 2. Touch, this shared installation bar 11 is installed in the uppermost part of the key installation position on the upper surface of instrument case 1, and this contact reinforces operating panel 5.

Figure 9 shows the main annular plate 155 on which a group of slide switches with slide buttons 51 (as in Figure 8) and a number of push-button switches with buttons 52 (as in Figure 8) are installed, and these buttons 51 and Buttons 52 protrude from the upper surface of the manipulation panel 5 . The main annular plate 155 is fixed at the protruding end of the post 152 with a threaded hole protruding downward from the inner surface of the steering plate 5, and the annular plate 24 is connected to the main annular plate 155 with an electrical connection. On this plate 24, rubber switches 22 are mounted as already described in the first embodiment. The main annular plate 155 obtains power from a set of batteries 54 housed in a battery case 53, which includes a pair of side walls 161 protruding downward at predetermined positions on the inner surface of the control panel 5, the two sides The walls are arranged parallel to each other.

The dry battery case 53 is shown in detail in FIGS. 14 and 15 . The dry battery box portion 53 has an end wall 162 formed on the inner surface of the manipulation panel 5 for blocking one end of a space between a pair of parallel side walls 161, and a pair of posts 163 formed on the manipulation panel 5. On the inner surface of the plate 5 and disposed at the other end of the space between the pair of side walls 161 . The pair of columns 163 are spaced apart from each other in a direction perpendicular to the pair of side walls 161, and each column has a C-shaped cross section. Openings of sections of the columns 163 are opposed to each other, and in order to avoid vibration of each dry cell between a pair of side walls 161 , vibration protection tapes 164 are stuck to opposite surfaces of the two side walls 161 . Helical spring 165 is contained on the inner surface of end wall 162, so that be contained in two side walls 161 and the negative end of that joint dry cell 54 between end wall 162 is connected, a pair of posts 163 pass terminal plate 166 both sides The sides are clamped in their openings to support a terminal plate 166, which is in contact with the positive terminal of the dry cell mounted between the two side walls and next to the post 163.

Opening portions 167 are formed at both longitudinal ends of each end wall 161 . When the dry battery contained in the dry battery case 53 is, for example, an AA-type (in the United States) or a TANSAN-type (in Japan) dry battery, the dry battery has an outer diameter of 14.5 mm, and the distance between the pair of side walls 161 corresponds to this outer diameter. The diameter is relatively small. Therefore, it is difficult to insert a finger between the pair of side walls 161, and thus it is difficult to complete the sticking work of the vibration protection tape 164 . The opening portion 167 facilitates the sticking work of the vibration protection tape 164 . More precisely, an end portion (as the right end portion of FIG. 14 ) of the vibration protection band 164 is in contact with the bottom surface of an opening portion 167 of the corresponding side wall 161, so that the position of the vibration protection band 164 on the height direction is limited and It is attached to the outer surface of one end of the side wall 161 . Then, the vibration protection band 164 is pasted on the inner surface of the corresponding side wall 161 in a tensioned state, and the other end portion of the vibration protection band 164 is bent into another opening portion 167, and is pasted on the corresponding side wall 161 other end outer surface , while the belt 164 is in contact with the bottom surface of the other end opening. As a result, the vibration protection belt 164 can be simply and easily attached at a predetermined height position on the inner surface of the corresponding side wall 161 without wrinkling.

The protruding end surfaces of the pair of side walls 161 of the dry battery case 53 are near the upper surface of the musical instrument case 1 when the operating panel 5 is installed at a predetermined position of the musical instrument case 1 . When one or both protruding surfaces of the pair of side walls 161 are in contact with the upper surface of the musical instrument case 1, the manipulation panel 5 can be reinforced. As shown in FIG. 7, when the dry battery outlet 171 is provided at a predetermined position of the musical instrument case 1, the dry battery 54 can be replaced without removing the manipulation panel 5 from the musical instrument case 1, and this predetermined position is between the pair of side walls 161. Corresponding dry battery storage space. The dry battery outlet 171 is closed by a battery cover. (not shown in the figure)

When the manipulation panel 5 is installed at a predetermined position of the instrument case 1, if the protruding end surfaces of the two side walls 161 are separated from the upper surface of the manipulation panel 1, as shown in FIG. On the inner surface of the control panel 5, the outer side of the side wall 161 protrudes downward, and the dry battery cover 173 is fixed on the protruding end of the post 172 by screws 174 to cover the opening of the dry battery box, which is on the protruding ends of a pair of side walls 161. at the side.

Fig. 17 is a diagram showing a main part of an electronic musical instrument keyboard device according to a fourth embodiment of the present invention.

In the keyboard device of this embodiment, the bottom case 102 is integrally molded with the front end of the keyboard chassis 100 of synthetic resin, which constitutes the musical instrument case 1, through the thin elastic member 103. The manipulation board 5 is integrally molded with the rear end of the keyboard chassis 100 through the thin elastic member 105 . All the black keys 18 are integrally molded with the front end portion of the manipulation panel 5 through the thin elastic member 107 .

Posts 111 with threaded holes are formed at various positions on the lower surface of the keyboard chassis 100 to protrude downward. When the injection molding is just completed, as shown by the dashed line in the figure, the bottom box 102 is arranged on one side of the keyboard chassis 100 . In this assembly process, firstly, as shown by the solid line, the bottom case 102 is moved to the lower side of the keyboard chassis 100 by elastically deforming the thin elastic member 103 . The bottom case 102 is in contact with the lower end surface of the post 111 of the keyboard chassis 100, and the screw 112 inserted into the through hole (not shown in the figure) formed at the bottom case 102 is screwed into the threaded hole on the lower end face of the post 111, so that The bottom box 102 is fixed to the lower end surface of the column 111 . Legs 113 are formed at various locations on the lower surface of the bottom box 102 .

Reinforcing ribs 116 are formed at a plurality of positions inside the rear surface of the steering panel 5 . The opening 115 is formed at the bottom of one side of each reinforcing rib plate 116, near the thin elastic part 105, when its entire injection molding has just been completed, the control panel 5 is on the side of the keyboard chassis 100 (as indicated by the dotted line) shown) and black keys 18 are placed together. In the assembly process, as shown in the solid line, the elastic deformation of the thin elastic member 105 is used to move the control panel 5 to the upper side of the rear of the keyboard chassis 100 (as shown in the solid line), and each reinforcing rib The opening portion 115 of 116 is engaged with an engaging wall 117 protruding upward at the rear end of the upper surface of the keyboard chassis 100 so that the manipulation panel 5 is fastened to the rear of the keyboard chassis 100 . If the posts with threaded holes are provided on the inner surface of the console 5 or the upper surface of the keyboard chassis 100, the screws can be screwed into the threaded holes of the posts through the console 5 or the chassis 100 without posts, thereby placing The manipulation panel 5 is fixed to the rear of the upper surface of the keyboard chassis 100 .

When the manipulation panel 5 is fixed to the rear of the keyboard chassis 100 as described above, as shown by the solid line in FIG. The button type automatic recovery rubber switch 22 is located under the pressure switch projection 21, and this projection 21 protrudes downward from the center on the lower surface of the black key 18, and the switch 22 is mounted on the front end of the elastic ring plate 123. Apparently, the elastic ring plate 123 is installed on the upper surface of the keyboard chassis 100 . The rear end portion of the elastic ring plate 123 extends to a position below the manipulation panel 5, and constitutes an electric circuit of the keyboard device.

The elastic recovery force of the thin elastic member 107 and the elastic automatic recovery force of the rubber switch 22 push the black keys 18 tightly upwards, and use an L-shaped hook 125 to determine the maximum upward movement position (initial position) of each black key 18. This hook 125 protrudes downwards from the front end of one of the two side walls 124, and passes through the through hole 126 of the front end of the keyboard chassis 100, and contacts with the bar-shaped upper limit stopper 127, and this stopper 127 is formed by Made of felt or the like, it is near the through hole 126 at the lower surface of the key rib chassis 100 . When the black key 184 is pressed, the lower limit stopper 128 made of felt or the like is used to limit the maximum downward movement position of each black key 18, and the lower limit stopper 118 is located corresponding to the upper limit stopper. The position on the keyboard chassis upper surface of 127, the lower end of paired side walls 124 of each black key 18 contacts with lower limit stopper 128. A plurality of guide rods 129 are installed on the front upper surface of the keyboard chassis 100 , and the guide rods 129 are used to guide the vertical movement of the black keys 18 . When the corresponding black key 18 moves in the vertical direction, each guide rod 129 is slidably in contact with the inner surface of the double side wall 124 of the corresponding black key 18, so that when the black key 18 moves in the vertical direction, Lateral movement is avoided.

In this keyboard device, the bottom case 102 and the manipulation panel 5 are integrally molded together with the keyboard chassis 100 of synthetic resin through thin elastic members 103, 105, and the black keys 18 are further integrally formed through thin elastic members 107. Mold injection together with control panel 5. Therefore, the number of components and the number of assembly steps of the keyboard device are greatly reduced, thereby reducing production and assembly costs. The fit precision among components, especially the fit precision of the black key 4 is improved.

In FIG. 17, the white keys are not shown, but the white keys may be integrally molded together through the thin elastic member and the front end of the manipulation plate 5 as in the case of the black keys 18. For example, as in the case of the fifth embodiment described later, the white keys formed separately may be mounted on the keyboard chassis 100, so that the white keys may be placed on the front end portion of the manipulation panel 5 in a predetermined arrangement corresponding to the black keys 18. Front part. In other words, only the white keys can pass through the thin elastic member and the control panel 5 entirely. The front parts are molded together, and individually molded black keys may be installed at predetermined positions on the keyboard chassis 100 .

Fig. 18 shows the main part of a keyboard device according to a fifth embodiment of the present invention. In FIG. 18, the same part numbers as those in FIG. 17 are used to designate equivalent or identical components, and detailed description will be omitted.

In the keyboard device of the fifth embodiment, the keyboard chassis 100, the bottom case 102 and the operation panel 5 are integrally molded with each other with synthetic resin, and the black keys 18 and white keys 131 are formed as separate members. 5 black keys 18 for five tones, such as C ^# , D ^# , F ^# , G ^# and A ^# , are integrally molded together with the common mounting bar 134 through the thin elastic member 133, and form a black key group, the five black keys 18 have a length corresponding to one octave. Seven white key groups 131 are molded together by thin elastic parts 135 and common installation bar 134 and form a white key group 136, and these seven white keys have seven tones, such as C, D, E, F, G, A Like B, the 7 white keys have a length corresponding to one octave.

The above-described black key group 4 and white key group 136 are installed in the keyboard chassis 100 so as to form one octave of the keyboard as will be described below. The installation bar 132 of the black key group 4 is first installed at a predetermined position on the upper surface of the keyboard chassis 100, and the common installation bar 134 of the white key group 136 is stacked on the upper surface of the common installation bar 132 of the black key group 4 , in this case, the black keys 18 of the black key group 4 for one octave and the white keys 131 of the white key group 136 for one octave are installed in a predetermined arrangement for one octave of the keyboard The keyboard is on the front half of the upper surface of the pan chassis 100, and screw insertion holes (not shown in the figure) are coincidently formed on the common mounting bars 132, 134 respectively. After the screw 136 is inserted into the corresponding screw insertion hole, it is screwed into a threaded hole (not shown in the figure), and the hole is formed on the keyboard chassis 100 . Such a black key set 4 and a white key set 136 are installed on the keyboard chassis 100 .

After a predetermined number of black key groups 4 and white key groups 136 are installed on the predetermined positions of the keyboard chassis 100, the operating panel 5 is mounted on the rear portion of the keyboard chassis 100 using an elastically bent thin elastic member 105, so that the black keys The common mounting bars 132 and 134 and the thin elastic members 133 , 135 of the key set 4 and the white key set 136 are covered by the manipulation plate 5 . Therefore, the appearance of the keyboard device can be improved without using a separately formed key covering member.

In the manipulation panel 5 of the keyboard device, push-button switches are installed as follows: a group of rubber switches 141 are installed on the upper surface of the elastic ring-shaped plate 123, which extends below the manipulation panel 5 on the upper surface of the keyboard chassis 100 , and a set of stick-type buttons 142 for pressing rubber switches 141 is installed in a guide 143 which is installed in the manipulation panel 5 and a guide opening 144 is formed on the upper wall of the manipulation panel 5 . The button 142 is prevented from falling out of the guide 143 and its opening 144 . A group of rubber switches 22 for selected tones are mounted on the front end of an elastic ring-shaped plate 123 which constitutes a keyboard device electrical path, and the above-mentioned rubber switch 141 is mounted on the rear end of the ring-shaped plate Therefore, an electrical connection is omitted in the keyboard device and the number of parts of the keyboard device is simplified.

Additional advantages and improvements are readily apparent from the above-described embodiments in this field. The present invention is therefore not limited in terms of keyboards to the specific details and representative apparatus described and shown herein, and various modifications may be made without departing from the spirit or scope of the general concept of the invention as defined in the claims and equivalents thereof type.

Claims (7)

1. A keyboard device comprising a musical instrument case (1), a plurality of sets of keys (12, 15, 18, 131) detachably connected to the musical instrument case (1) at its base ends (11, 14, 17), and a manipulation plate (5) mounted on said instrument case to cover the base ends (11, 14, 17) of said keys mounted to the instrument case (1), characterized in that said manipulation plate ( 5) one side edge is integrally molded together with a key cover (41), and this cover (41) is used to cover the base ends (11, 14, 17). 2. Apparatus according to claim 1, characterized in that said sets of keys (12, 15, 18, 131) are mutually molded at their base ends (11, 14, 17). 3. The device according to claim 1, characterized in that said control panel (5) is detachably installed on said musical instrument case (1). 4. The device according to claim 1, characterized in that, said manipulation plate (5) is integrally molded together with said musical instrument case (1) through a thin elastic part (105), and the thin elastic part (105) formed at the position of the peripheral edge of the instrument case on the side opposite to the base end portions (11, 14, 17) of the keys. 5. The device according to claim 1, characterized in that the loudspeaker fixing part (43) for fixing the loudspeaker (44) is further integrally molded together with the control panel (5). 6. The device according to claim 1, characterized in that the tone card box (61) for holding the tone card is further integrally molded together with the operation panel (5). 7. The device according to claim 1, characterized in that the speaker fixing part (43) that can fix the speaker (44), and the tone card box for holding the tone card (63) are further integrated with the control panel (5) Injection molded together.

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