JP3618504B2 - Keyboard instrument heating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a keyboard instrument heating apparatus for heating a keyboard instrument and a player's feet and knees.
[0002]
[Prior art]
When playing a keyboard instrument in cold weather, especially in the morning in the winter, the keyboard is cold, which may cause the fingertips to bite, impede performance and reduce the desire to play. is there. 2. Description of the Related Art Conventionally, as a keyboard musical instrument heating apparatus that solves this problem, a heater such as a heating wire heater is embedded in the keyboard to electrically warm the keyboard itself.
[0003]
[Problems to be solved by the invention]
According to the above conventional keyboard instrument heating device, in order to embed a heating wire heater or the like in the keyboard, it is necessary to perform wiring in the keyboard portion, which makes it difficult to manufacture and costs high. In particular, in the case of an acoustic piano, unlike an electronic keyboard instrument, this problem is significant because it is not originally structured to be wired. In addition, because the keyboard itself is heated, the keyboard itself is warmed, but there is also a problem that the feet and the vicinity of the knees are cold until the room temperature rises, and the performance becomes painful.
[0004]
The present invention has been made in order to solve the above-described problems, and is an easy-to-manufacture product that can reduce production costs and can effectively warm the keyboard and the player's feet and the vicinity of the knee. An object is to provide a heating device.
[0005]
[Means for Solving the Problems]
According to the heating device for a keyboard instrument according to claim 1, a cloth of a size that is provided so as to be movable separately from the keyboard instrument and can cover the entire keyboard of the keyboard instrument is built in the cloth and adjacent to the cloth. A heating wire heater meanderingly arranged so that the heating wires are close to each other, and a heating wire heater that generates heat by power supply, and a pair of surface fasteners that can be engaged with each other , and one of the surface fasteners It is fixed to the surface of the cloth, and the other is fixed near the keyboard of the keyboard instrument.
[0006]
According to this keyboard instrument heating device, the heating wire heater is meandering so that the heating wires adjacent to each other are close to each other. A sufficient heater length can be secured to increase the heat generation effect. As a result, when the entire keyboard is covered with a cloth incorporating the heating wire heater and the heating wire heater is heated by the supply of power, the entire keyboard can be uniformly and effectively warmed. Further, since this cloth is separate from the keyboard instrument, it is easier to manufacture than the conventional one in which the heater is embedded in the keyboard, and the manufacturing cost can be reduced. Furthermore, since this cloth is movable with respect to the keyboard instrument, it can be placed on the performer's knee as a lap for playing, thereby effectively warming the player's feet and the vicinity of the knee. Further, the cloth containing the heating wire heater can be fixed to the vicinity of the keyboard by a one-touch operation of engaging one and the other of the hook-and-loop fasteners. This prevents the cloth from coming off the keyboard or falling to the floor, so that the keyboard can be reliably warmed.
[0007]
In the above, it is preferable that the cloth can be folded into almost the same size as the whole keyboard via the folding part, and a heating wire heater is preferably built in a part other than the folding part.
[0008]
According to this keyboard instrument heating device, since the cloth can be folded to the same size as the entire keyboard via the folding part, it can be folded when the keyboard is heated, and spread when used as a lap. Can be used in large sizes. In addition, the cloth has a built-in heating wire heater in a portion other than the folding portion, and even when the folding and unfolding operations are repeated, a bending load is hardly applied to the heating wire heater, so that it is difficult to disconnect. Thereby, durability improves.
[0011]
It is preferable to further include a switch for turning on / off the heating wire heater according to opening / closing of the keyboard lid.
[0012]
According to this keyboard instrument heating device, the heating wire heater is automatically turned on when the keyboard lid is opened by the switch, and is automatically turned off when the keyboard lid is closed. Even when the heater is closed, the heating wire heater does not remain on. Thereby, overheating of the heating wire heater and waste of electric power can be prevented, and safety and economy are improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a keyboard instrument heating device according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an electric blanket to which the present invention is applied. In the figure, an electric blanket (heating device) 1 is composed of a rectangular blanket (cloth) 1a having a horizontally long plan shape, and a heating wire heater 2 is wired therein. The heating wire heater 2 is composed of heating wires 2a that are wired one by one up and down across the center of the blanket 1a. The heating wires 2a are adjacent to each other. It is wired with a very narrow and repeated meandering with a constant width, and it is wired very densely without gaps. Thereby, the heating wire heater 2 can increase its heat generation effect by increasing its length, and when placed on the keyboard 4 (FIG. 4), as will be described later, the entire keyboard 4 is uniform, Can warm evenly.
[0014]
Moreover, the heating wire 2a of each one line of upper and lower sides is connected by the both ends 2b and 2b, respectively, and this connection part 2b and 2b protrudes the exterior of the blanket 1a, and folds the blanket 1a into a half in the center part horizontally. At that time, almost no bending load is applied. In addition, the connecting portions 2b and 2b are covered with a synthetic resin or rubber coating on the surface thereof, and are reinforced so as not to be damaged by an external force. Further, as shown in FIG. 1, the blanket 1 a is not provided with the heating wire 2 a in the left-right direction of the central portion inside, and this portion is a folded portion. When the blanket 1a is folded in half via this folding part, the heating wire 2a is wired other than the folding part, so that almost no bending load is applied. Further, when the blanket 1a is folded, its width and length are configured to be approximately the same size as the entire keyboard 4 so that the entire keyboard 4 can be covered when placed on the keyboard 4. ing.
[0015]
Furthermore, a power cord 2c for supplying household power (AC 100V) to the heating wire heater 2 is connected to one end portion (left end portion in FIG. 1) of the heating wire heater 2, and this power cord 2c As shown in FIG. 2, a controller C is provided. This controller C is for the user to set the upper limit temperature of the heating wire heater 2, the heating time, the heating start time, and the like, and heating / stopping of the heating wire heater 2 is automatically performed according to the settings. To be done.
[0016]
As shown in FIG. 3, the power cord 2c extends from the controller C into the upright piano (keyboard musical instrument) 3 and is connected to a household power outlet (not shown). Is provided. As shown in FIG. 3, the limit switch 5 is disposed on the upper surface of the time tree 6 of the upright piano 3, and performs an on / off operation according to the opening / closing of the keyboard lid 7, and the heating wire heater 2. The power supply to the side is executed / stopped.
[0017]
Moreover, as shown to Fig.4 (a), the three surface fasteners 8a are being fixed to the edge part (upper end part or lower end part of the figure) of the blanket 1a, and these surface fasteners are fixed. 8a has many small ridges 8c on its surface. On the other hand, as shown in FIG. 4 (b), the surface presser 9 of the upright piano 3 is fixed with three surface fasteners 8b (only one is shown), and these surface fasteners 8b It has many small rings 8d on the surface. These hook and loop fasteners 8a and 8b are paired to form one hook and loop fastener 8 one by one. The face with the flange 8c and the face with the ring 8d face each other and are pressed against each other. Thus, the flange 8c is locked to the wheel 8d. Thereby, the hook and loop fastener 8a is fixed to the hook and loop fastener 8b, so that the end portion of the blanket 1a in the width direction can be fixed to the keyboard presser 9.
[0018]
The operation of the electric blanket (heating device) 1 configured as described above will be described. First, when the electric blanket 1 is used, the user folds the electric blanket 1 in a horizontally long manner in the folding portion (the left-right direction of the central portion) as shown in FIG. At this time, as shown in FIG. 1, the heating wire 2a is not wired inside the folding portion, so that the bending load is hardly applied to the heating wire 2a and the wire is not disconnected. Next, in this state, the keyboard lid 7 of the upright piano 3 is opened, and as shown in FIG. 4B, the electric blanket 1 is placed on the keyboard 4 and the surface fastener 8a is pressed against the surface fastener 8b. At this time, since the hook 8c of the hook and loop fastener 8a is locked to the ring 8d of the hook and loop fastener 8b, the electric blanket 1 is fixed to the keyboard presser 9 and does not fall or shift from the top of the keyboard 4.
[0019]
Thereafter, the controller C sets the heating temperature and heating time of the electric blanket 1 to desired ones. At this time, the limit switch 5 is turned on by opening the keyboard lid 7 of the upright piano 3, so that power can be supplied to the heating wire heater 2. 4 is warmed. When the keyboard 4 is heated, the electric blanket 1 is sized so that the entire keyboard 4 can be warmed in a state of being folded in half. Further, the heating wire 2a in the electric blanket 1 is adjacent to the adjacent heating wire 2a. Since they meander so that they are close to each other and are wired very densely, when the heating wire heater 2 generates heat, the entire keyboard 4 can be uniformly heated without unevenness.
[0020]
When the keyboard cover 7 is accidentally closed while the electric blanket 1 is placed on the keyboard 4 during heating, the limit switch 5 is turned off by the keyboard cover 7 to supply power to the heating wire heater 2. Is refused. Thus, when the keyboard lid 7 is closed, the heating wire heater 2 is always turned off, and overheating of the heating wire heater 2 and waste of electric power can be prevented, so that safety and economy are improved.
[0021]
After that, when the keyboard 4 is warmed to a desired temperature, the electric blanket 1 is removed from the keyboard 4 by removing the surface fastener 8. At this time, since the electric blanket 1 is simply connected to the power cord 2c, the electric blanket 1 can be easily moved, and the performer can spread the electric blanket 1 and put it on the knee as needed (FIG. 3). ). Thereby, at the time of a performance, a player's step and knee vicinity can be warmed effectively. In addition, since the electric blanket 1 is separate from the upright piano 3, the electric blanket 1 can be easily manufactured as compared with a conventional case in which a heater is embedded in a keyboard, and the manufacturing cost can be reduced.
[0022]
In the above embodiment, the limit switch 5 is used as a switch for turning off the heating wire heater 2 when the keyboard lid 7 is closed. However, the present invention is not limited to this, and the opening / closing of the keyboard lid 7 is detected by a photo sensor. Then, the heating wire heater 2 may be turned on / off, and any switch may be used as long as the heating wire heater 2 can be turned on / off in accordance with opening / closing of the keyboard lid 7. The place where the surface fastener 8b is fixed may be a keyboard lid, as long as it is in the vicinity of the keyboard. Further, when the electric blanket 1 is folded in half, the size is almost the same as that of the entire keyboard. However, the present invention is not limited to this, and the electric blanket 1 may be folded in any manner such as a trifold.
[0023]
【The invention's effect】
As described above, according to the keyboard musical instrument heating device of the present invention, it is easy to manufacture, the manufacturing cost can be reduced, and the keyboard and the player's feet and the vicinity of the knee can be effectively warmed. Moreover, the durability, safety, and economical efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view in which a part of a keyboard instrument heating device according to the present invention is cut away.
FIG. 2 is a perspective view showing a state where an electric blanket is folded in half and placed on a keyboard.
FIG. 3 is a perspective view showing a state in which the electric blanket is used as a lap for playing an upright piano.
4A is a perspective view showing a surface tape fixed to an electric blanket, and FIG. 4B is a perspective view showing the surface tape fixed to a keyboard presser.
[Explanation of symbols]
1 Electric blanket (heating device)
1a Blanket (cloth)
2 Heating wire heater 2a Heating wire 3 Upright piano (keyboard instrument)
4 Keyboard 5 Limit switch (switch)
7 Keyboard lid 8 A pair of surface fasteners 8a Surface fasteners 8b Surface fasteners

Claims (3)

A cloth of a size that can be moved separately from the keyboard instrument and that can cover the entire keyboard of the keyboard instrument;
A heating wire heater that is built in this cloth and has a heating wire that is meandered so that adjacent heating wires are close to each other, and generates heat by power supply;
A pair of hook-and-loop fasteners engageable with each other,
One of the hook-and-loop fasteners is fixed to the surface of the cloth, and the other is fixed in the vicinity of the keyboard of the keyboard instrument. 2. The cloth can be folded to a size substantially the same as the whole keyboard via a folding part, and the heating wire heater is incorporated in a part other than the folding part. The heating device for the keyboard instrument described. The keyboard instrument heating device according to claim 1, further comprising a switch for turning on / off the heating wire heater in accordance with opening / closing of the keyboard lid.

Images