JPH0655187U - Large bass recorder with rectangular tube - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding the key that closes the sound hole at the bottom of the large bass recorder with a square tubular body and the sound hole next to it, that is, when the finger is not operated, that is, when the key is open. Keep the open amount constant so as not to spoil the aesthetic appearance, and prevent the key from being damaged due to being too open and subject to shock. [Structure] Adjacent two thin type sound hole opening / closing keys are formed so that the thin projections formed on the engaging portions of the sound hole opening / closing keys are overlapped with each other. The protruding part is also pushed up, the two sound hole opening / closing keys simultaneously open and close the sound hole, and perform the same movement, and
It is characterized in that only the engaging portion of the upper protruding portion is pushed up so that only the sound hole opening / closing key is moved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bass bass recorder key such as a contrabass recorder having a rectangular tube, and more particularly to an improvement of a key combination operated by a little finger.

[0002]

[Prior art]

 As shown in FIG. 3, a large bass recorder such as a rectangular contrabass recorder is composed of a head tube (A), a middle tube (B) and a lower tube (C). An S-shaped mouthpiece pipe is connected to the tip of the head tube (A), and constitutes a mouthpiece. Keys are installed in the middle pipe (B) and the lower pipe (C) to open and close each sound hole. The rectangular tubular body has four plates, that is, a front plate (D), a back plate (E), and left and right side plates (F), which are bonded together to form a resonance chamber for angular air vibration. The keys of the middle tube (B) and the lower tube (C) are thin plates and have a rectangular shape. The shaft rod is penetrated through the thick portion along one side of the rectangle, and the shaft rod It is supported by a suspension column standing on the edge side of the surface plate (D), and this shaft serves as a fulcrum (G) so that the key makes an angular motion to open and close the sound hole.

When the key, that is, the sound hole opening / closing key (I) opens and closes the sound hole, the system directly closes the sound hole by pressing the sound hole side of the fulcrum (G) with a fingertip, and an operation key ( There is a system in which the tip end of H) pushes up the engaging portion (L) on the opposite side of the sound hole of the fulcrum (Gb) to close the sound hole. The former system is installed in both the middle pipe (B) and the lower pipe (C), and the latter system is installed to open and close the sound hole at the bottom end of the lower pipe (C) and the sound hole next to it. , It is designed to be operated with the little finger.

[0004]

[Problems to be solved by the present invention]

 As shown in FIG. 4, the key system operated by the little finger is composed of an operation key (H) and a sound hole opening / closing key (I). The operation key (H) is a thin and long rectangular shape, and the little finger at one end A lever (J) for operation is formed, and the other end reaches the sound hole at the lowermost end of the tubular body, and the sound hole opening / closing key (I) located there is moved by levering around the fulcrum (Ga). It has become. As described above, the sound hole opening / closing key (I) has a rectangular shape, and the shaft bar supported by the suspension column standing on one edge of the surface plate (D) of the tubular body serves as a fulcrum (Gb). exercise. In this case, the engaging portion (L) receives a force from the operation key (H) and is pushed up, and as a result, the sound hole opening / closing key (I) closes the sound hole. This key system consists of two operation keys (Ha, Hb) and two sound hole opening / closing keys (Ia, Ib) for closing the sound hole at the lowermost end and the sound hole next to it. Both the operation keys (Ha, Hb) are operated by the little finger.

In this case, the two sound hole opening / closing keys (Ia, Ib) are lined up in front and back, and the sound hole opening / closing key (I) of 1 is activated by moving the operation key (H) of 1 respectively. Both sound hole opening / closing keys (Ia, Ib) are operated by simultaneously moving the operation keys (2, 2) (Ha, Hb). When operating, the sound hole opening / closing key (Ia) that closes the lowest sound hole is pressed by the long operation key (Ha), and the sound hole opening / closing key (Ib) that closes the adjacent sound hole is pressed by the short operation key (Hb). It is pushed up to operate. Although this operation key (Ha, Hb) moves, the fulcrum (Ga) of the lever movement is shared, and since it moves so as to rotate around that fulcrum (Ga), the movement of the long operation key (Ia) becomes large, The movement of the short operation key (Hb) is slightly small. Therefore, the amount of opening / closing movement of the sound hole opening / closing key (I) operated by receiving a force from the operation key (H) is large in the case of the sound hole (lowermost sound hole) opening / closing key (Ia). In the case of the sound hole opening / closing key (Ib) on the front side, it is slightly smaller. As a result, since both keys (Ia, Ib) block the sound holes on the same plane that are opened in the surface plate of the pipe body, the sound hole opening / closing key (Ia) at the lowermost end opens greatly when the sound hole is opened. The key (Ib) in front of it must be set to open slightly smaller. This has the disadvantage that the open bottom edge key is not only aesthetically pleasing, but it is also susceptible to external impacts and is easily damaged. Also, when the operation key reaches the position of the sound hole at the very lower end from the operation position and is very long, and therefore the key that composes this is made of wood, the quality of the wood deteriorates and the key warps. Will have the disadvantage of rubbing against each other and slowing down.

[0006]

[Means for solving the problem]

 As described above, when the sound hole opening / closing key (Ia) at the bottom end and the sound hole opening / closing key (Ib) in front of it are open, the opening amounts are not uniform, which impairs aesthetics and simultaneously increases the size. Open keys eliminate the disadvantages of being susceptible to impact and being easily damaged, and when the keys are made of wood, the quality of the wood may change and the keys may warp, causing them to rub against each other and to move. In order to solve the disadvantage that the sound hole opening / closing key becomes sluggish, in the first aspect, the engagement of another sound hole opening / closing key is provided on the thin protrusion provided on a part of the engaging portion of the adjacent sound hole opening / closing key. The thin protrusions of the joint are formed so as to overlap with each other, and the operation key of 1 is made to act on the engaging portion of the thin protrusion of the lower part so that the sound hole opening / closing keys of 2 simultaneously move, and The other one operation key only on the engaging part of the thin wall protruding part It is characterized in that only one sound hole opening / closing key is operated so that the operation key and the sound hole opening / closing key have substantially the same length in the above combination. It is characterized by a key combination such that

[0007]

[Action]

 According to the present invention, the structure in which the thin protrusions of the engaging portions of the adjacent sound hole opening / closing keys are formed so as to overlap the thin protrusions of the engaging portions of the other sound hole opening / closing keys are When the engagement part is pushed up by the thin-walled protrusion, the engaging part of the overlapping thin-walled protrusion is also pushed up at the same time, so the two sound hole opening / closing keys move simultaneously, and the same movement is always performed. can do. Therefore, the two keys open and close the sound hole at the same angle, and even when they are stationary, they are stationary at the same angle, so there is no unevenness and the appearance can be adjusted. For this reason, it is possible to prevent that the key is specially opened greatly, and thus it is easy to receive a shock and break easily. Further, when only the engaging portion forming the upper thin protrusion is pushed up, only the sound hole opening / closing key 1 can be operated. The sound hole opening / closing key can thus move independently or independently, or can move simultaneously with the movement of the key of the lower thin protrusion as described above.

Further, when the operation key and the sound hole opening / closing key are made to have substantially the same length, two conventional long operation keys, that is, a sound that opens from the finger operation position to the lowermost end of the pipe body. The key that reaches the position of the hole can be significantly shortened, so that when the wood key that composes it changes in quality, the operation key will warp and rub against each other during key operation. It is possible to prevent the drawback that the movement becomes slow.

[0009]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a key system according to the present invention. 1 is a rectangular tube body, 2 is a front plate, 3 is a side plate, 4 is a back plate, 5 is an operation key, 6 is a lever, 7 is a sound hole opening / closing key, 8 is an engaging portion, 9 is a fulcrum, and 10 is a fulcrum. The thin protrusion 11, 11 is a suspension column.

On the side plate (3) of the tubular body (1), two lever type operation keys (5a, 5b) by a fulcrum (9a) are arranged. The levers (6a, 6b) at the tip are pushed down by the little finger, and the other end acts on the engaging portions (8a, 8b) of the sound hole opening / closing keys (7a, 7b), and the engaging portions ( 8a, 8b) are pushed up.

Two lever type sound hole opening / closing keys (7a, 7b) are formed on the surface plate (2) of the tubular body (1), and the lever (9b) supported by the suspension column (11) makes a lever movement. do. In this case, the sound hole opening / closing keys (7a, 7b) are moved by applying the force of the operation keys (5a, 5b) at the engaging portions (8a, 8b). The sound hole opening / closing keys (7a, 7b) are adjacent to each other and work to open / close the lowest sound hole and the sound hole adjacent thereto. In this case, the sound hole opening / closing keys (7a, 7b) are engaged. A thin protrusion (10a, 10b) is formed on the joint portion (8a, 8b), and the protrusion (10b) of the engagement portion (8b) is provided on the protrusion (10a) of the engagement portion (8a). ) Are configured to overlap. By overlapping the protrusion (10a) and the protrusion (10b), the sound hole opening / closing key (7b) moves in response to the force of the operation key (5a). Can move, and at the same time can perform angular movement of opening and closing the sound hole. As a result, the two keys are opened at the same angle even when the key is not operated, that is, when the sound hole is opened, and the way of opening the key does not become uneven like the sound hole opening and closing keys of the past. . Further, when only the engaging portion (8b) forming the upper thin protrusion (10b) is pushed up, the sound hole opening / closing key (7b) can also move independently as described above. Thus, it is possible to move simultaneously with the movement of the key (7a) of the lower thin protrusion (10a).

FIG. 2 shows a second embodiment, which is characterized in that the operation keys and the sound hole opening / closing keys are formed to have substantially the same length. . Two sound hole opening / closing keys (17a, 17b) are arranged on the surface plate (2) of the pipe body (1), and the sound hole opening / closing keys (17a, 17b) are arranged on the surface plate (2) of the pipe body (1). ) The levers (21) stood on the left and right edges of the brackets (21) perform a lever motion with a fulcrum (19) set to straddle the pipe (1). At this time, the sound hole opening / closing key is moved by receiving the force of the operation keys (15a, 15b) at a part of the engaging portions (18a, 18b). And the said engaging part (18a, 18b) forms a thin protrusion part (20a, 20b), and the protrusion part of the engaging part (18b) is on the protrusion part (20a) of this engaging part (18a). (20b) is configured to overlap. Accordingly, when the sound hole opening / closing key (17a) moves by receiving the force of the operation key (15a) when (20b) overlaps the protruding portion (20a), the sound hole opening / closing key (17b) is moved. ) Can move, and the sound holes can be opened and closed at the same time by the engagement of the protrusions (20a, 20b). Also, when only the engaging portion (18b) forming the upper thin protrusion (20b) is pushed up, the sound hole opening / closing key (17b) can move independently as described above. As described above, it is possible to move simultaneously with the movement of the key (17a) of the lower thin protrusion (20a).

As a result, even when the key is not operated, that is, when the sound hole is opened, the two keys are opened at the same angle, and the way of opening the key is uneven like the sound hole opening and closing keys of the past. It never happens. In the past, the operation key was long, that is, it reached from the finger operation position to the lowermost position of the sound hole, but since the present invention can be formed in half the length, the operation key is made of wood. In this case, it is possible to eliminate the disadvantage that the wood materials that make up this warp when they change, rubbing against each other and slowing down the movement.

[0014]

【effect】

 According to the present invention, in the tubular key of the large rectangular bass recorder, each sound hole opening / closing key that opens and closes the two sound holes at the bottom end has a large key at the bottom end when the sound hole is opened. It opens, and the key in front of it opens slightly smaller, eliminating the drawback of becoming uneven, and it can be opened with the same size, so it also works in terms of aesthetics and is less susceptible to external shocks. , It became hard to be damaged.

Further, since the number of operation keys formed on the side plate of the tubular body is about half that of the conventional operation keys, even if the wood quality of the operation keys is slightly altered and warped, the movement is slow due to rubbing. Can be eliminated, and a smooth key movement can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a key combination of a large-sized bass recorder having a rectangular tubular body according to the present invention.

FIG. 2 is a perspective view showing another embodiment of the key combination according to the present invention.

FIG. 3 is an overall perspective view of a conventional large-sized bass recorder having a rectangular tubular body.

FIG. 4 is a perspective view showing a key combination of a conventional large-sized bass recorder having a rectangular tubular body.

[Explanation of symbols]

 1: Square tube, 2: Front plate, 3: Side plate, 4: Back plate, 5a, 5b, 15a, 15b: Operation key, 6a, 6b: Lever 7a, 7b, 17a, 17b: Sound hole opening / closing key 8a, 8b, 18a, 18b: Engagement part 9a, 9b, 19: Support point 10a, 10b, 20a, 20b: Projection part 11, 21: Suspended column

Claims (2)

[Scope of utility model registration request] 1. A combination of two adjacent lever-type operation keys and two adjacent lever-type sound hole opening / closing keys which are actuated by the force of the operation keys to engage the sound hole opening / closing keys. Is formed so that the thin-walled projecting portion of the other sound hole opening / closing key overlaps the thin-walled projecting portion of the other portion, and the operation key of 1 is acted on the engaging portion of the lower thin-walled projecting portion. Two sound hole opening / closing keys are moved at the same time, or the other one operation key is operated only on the engaging portion of the upper thin projection so that only one sound hole opening / closing key is moved. A large bass recorder with a square tubular body. 2. A large bass recorder having a rectangular tubular body, wherein the operation keys and the sound hole opening / closing keys have substantially the same length.