JPS581827Y2 - Brass instrument valve mechanism - Google Patents

Description

[Detailed description of the invention] This invention relates to a pulp mechanism for a brass instrument with a five-point structure that can be easily operated.

Brass instruments such as trumpets are generally equipped with a valve mechanism between the blowpipe a and the bell section C (trumpet tube) as shown in Figure 1.
As shown in Figure A, it is composed of multiple cylinders S with elongated piston-shaped valves V, and since each cylinder and valve V are made of copper alloy, the instrument itself becomes heavy and difficult to play. It is laborious and difficult to handle, especially for T41 children, and the several stages of air passages provided in the pulp V, such as the opening in the figure, are made with complex curved surfaces, making it difficult for sound to pass through. However, it has drawbacks such as requiring many steps and manpower to produce and being expensive.

This invention was developed in view of the above circumstances, and aims to provide a valve mechanism for a brass instrument that is easy to manufacture, lightweight, easy to operate, and has good sound quality.

Referring to the drawings, the embodiment will be described. In FIG. 3, reference numeral 1 denotes a rectangular parallelepiped plastic cylinder case, and vertical partition walls 2ae are provided at required intervals.
2b is divided into three cylinder chambers a and bee, and both side walls 1as1b are formed thick [and both ends of a valve, which will be described later, are fitted and slid into positions corresponding to the cylinder chambers a and bC. They each have wide recesses 3a and 3b for movement.

The valve 4 is also made of plastic material, and as shown in FIG. 4A9, the main body part 4a has a V-shaped plane and a rectangular flange part wider than the main body part 4a. A straight through hole 5a facing the longitudinal direction of the cylinder case 1 is bored at a lower position, and horizontal straight through holes 5b are formed at positions above the through hole 5a on both sides of the collar 4b. It is provided.

A small screw hole 6 is provided on the upper end surface, and a downward protrusion T for locking a restoring spring is provided at the center of the lower end surface.

Such pulp 4 is fitted into the recesses 3a and 3b provided in the side walls 1a and 1bK of the cylinder case 1 at the ends of the brim portion 4b and the V-shaped main body portion 4a, and is then inserted into each cylinder chamber Qe be.
C, but the center one is oriented in the opposite direction to the two end ones.

As shown in FIG. 5, on the bottom plate of the cylinder case 1, an upright rod 8 serving as a stopper for the pulp 4 is provided at the center of each cylinder chamber B*bec, and a downward protrusion 7 on the lower end surface of the pulp 4 is provided. A restoring spring S is disposed between the pulps 4 and 4, and each pulp 4 is biased upward so that its upper end surface substantially coincides with the upper surface of the cylinder case 1 when not in operation.

Then, as shown in FIGS. 3 and 5, both end walls 1c, 1d and partition wall 2a = 2bK of the cylinder case 1 are connected to the main body 4a of each pulp 4 [with a through hole 5a corresponding to a certain through hole 5a] when not in operation, as shown in FIGS. 3 and 5. 9 and 10 are provided on both end walls 1c and 1
A blowing pipe A is connected to the through hole 9 d.

In addition, in the portion of one side wall 1b of the cylinder case 1 corresponding to the cylinder chambers a and C on both sides, an end wall 1c=1
d and a U-shaped detour pipe u1 having different lengths and opening at the height of the through holes 9 and 10 of the partition walls 2a and 2b.
and u3, except that the side wall 1a is similarly provided with a U-shaped detour u2 having different lengths.

In addition, 11 is an operating rod attached to the screw hole 6 on the upper end surface of each pulp 4, 12 is a lid body to be attached to the upper end of each cylinder chamber asb*d, and FIG. This shows the completed state after connecting the .

In the illustrated state in which each operating rod 11 is not operated, both side walls 1a
*The bypass pipe ultu2tu3 provided in 1b is closed by the collar 4b of each pulp 4, so in this state, if you blow through the blowing pipe A to send in this air, the air will flow to the front end wall of the cylinder case 1. 1c (7) The through holes 9, 5a, 10 enter the cylinder chamber a through the through hole 9 and are aligned in a line such as the through hole 5as of the pulp 4 and the through hole 10 of the partition wall 2a.
Then, it passes straight through the through hole 9 in the other end wall and exits into the trumpet tube B, producing the desired musical tone.

If you now operate the operating rod 11 in front of you to push down the pulp 4 in the cylinder chamber a, the pulp 4 will open through the longitudinal hole 5a.
communication with the through hole 9 of the end wall 1c is blocked (each cylinder chamber asbse is provided with a wall that blocks the through hole 5a when the pulp 4 is pushed down).

) Conversely, since the through holes 5b on both sides of the collar 4b coincide with the openings of the front detour pipe u1, the air entering the front of the cylinder chamber a from the through hole 9 of the end wall 1c passes through the detour pipe u1. Enter the pulp 4 through the through hole 10 of the partition wall 2a, the adjacent cylinder chamber b1, the through hole 5as of the pulp 4, and the next partition wall 2b.
It exits from the trumpet tube B through the through hole 10, and the length of the conduit changes from the case described above, and a musical tone with a different pitch than before is emitted.

Furthermore, if the pulp 4 in the other cylinder chambers S or C is manipulated, the length of the conduit will change accordingly, and the pitch will also change accordingly.

And the operation can be performed easily.

As mentioned above, in this invention, the cylinder case and the block-shaped pulp housed therein are made into a linear shape, and the through holes provided in the end walls and bulkheads of the pulp and cylinder case are also linear and have complex curved surfaces. I tried not to let them have it, so
It can be easily manufactured by molding plastic, is significantly lighter in weight than conventional metal products, can be played for long periods of time without getting tired, is easy for children to operate, and has air ventilation. The holes do not have complicated curved surfaces, so sound can pass through easily, and since bypass pipes that open into each cylinder chamber are connected to both side walls, the pitch can be easily changed during the performance. .

[Brief explanation of drawings]

Figure 1 shows the oblique fJffl of a conventional brass instrument. FIG. 2A is a perspective view of a part of the valve mechanism. The opening in Figure 2 is a front view of the pulp. FIG. 3 is a perspective view of the pulp mechanism according to this invention. FIG. 4A is a perspective view of the pulp. Figure 4 is a side view of the pulp. FIG. 5 is a front view of the pulp mechanism. FIG. 6 is a plan sectional view taken along the line XX in FIG. 5. Figure 7 is a perspective view of a brass instrument with a pulp mechanism of this invention. In the figure, 1 is the cylinder case, 1a*1b is the side wall, 1c=
1d is the end wall, 2as2b is the partition 3a, 3b is the recess, 4 is the pulp, 4a is the main body, 4b is the collar, 5a is the through hole in the main body, 5b is the horizontal passage L, 9 is the through hole in the end wall , 10 is a through hole in the partition wall, A is a blowing pipe, B is a trumpet pipe, uleu2s
u3 is a bypass pipe, S is a spring.

Claims (1)

[Scope of utility model registration request] A rectangular parallelepiped plastic cylinder case 1 is divided into a plurality of cylinder chambers aeb*e by a plurality of partition walls 2a, 2b, and each cylinder/chamber a, b, c has a plastic cylinder case 1 made of a main body 4a and a flange 4b. A block-shaped pulp 4 is accommodated in a state of offering, and the main body portion 4a is provided with a straight through hole 5a facing the longitudinal direction of the cylinder case 1, and the collar portion 4b is provided with a straight through hole 5a at a position above the through hole 5a. A straight horizontal through hole 5b is provided in the cylinder case 1, and straight through holes 9 and 10 are bored in the both end walls 1cm1d of the cylinder case 1 and the partition walls 2a and 2b to communicate with the through hole 5a of the pulp 4 when not in operation. , each cylinder chamber a s b on both side walls 1a=1b
It is made by connecting detour pipes of different lengths that open to e.
The opening of the detour pipe opens the pulp 4 when the valve 4 is operated.
A valve mechanism for a brass instrument, characterized in that it communicates with a horizontal passage hole 5b.