JPS6350714Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a drum that improves the vibration efficiency of the drum and improves the acoustic characteristics.

[Prior art]

The drum supports and tensions a drum head at each open end of the drum, transmits the vibration of each drum head to the other drum head using an air column in the drum as a vibration transmission medium, and at the same time transmits it to the drum itself to cause the drum to resonate, The sound is expanded and radiated. Therefore, the drum must maintain a stable shape, not be deformed by climatic conditions, drum head tension, etc., have little deviation in articulation, and not cause self-vibration or self-absorption. Ru.

However, in the case of conventional drums, the lugs that constitute the drum head's support and tension means are directly fixed to the outer circumferential surface of the drum, so the vibration efficiency of the drum itself is poor, preventing natural vibrations and reducing the volume. The drawbacks were that the acoustic characteristics were degraded due to lack of tracking power and generation of noise.

[Summary of the idea]

This idea was made in view of the above points, and consists of a trunk body and a rim that is fitted and fixed to the open end of the trunk body, and a plurality of rims are attached to the outer periphery of the trunk body via mounting plates. The fixing part of this mounting plate is fixed to the rim part or the overlapping part of the trunk body and the rim, and the other parts are separated from the trunk body, thereby making the trunk body more efficient. To provide a drum that can be vibrated well and has improved acoustic characteristics.

This invention will be described in detail below based on embodiments shown in the drawings.

〔Example〕

FIG. 1 is a longitudinal cross-sectional view of a main part showing an embodiment of a drum according to this invention. Drum 1, drum 2, drum 2
A pair of upper and lower drum heads 3A, 3B, which are stretched with a predetermined tension at both end openings of the drum head 3A,
It is generally composed of 3B support tension means 4 and the like.

The body 2 includes a body 2A that is open at both ends and is formed into a cylindrical shape from wood, laminated plywood, light metal such as aluminum, fiber-reinforced plastic, etc.;
It is comprised of a pair of upper and lower rims 2B, 2B that are fitted onto the outer peripheral surface of each opening of A and fixed respectively. Each of the rims 2B, 2B is made of hard wood such as birch, beech, or maple, high-density fiber-reinforced plastic (for example, glass fiber-reinforced plastic), or light alloy such as aluminum or zinc. Further, each of the rims 2B, 2B has a substantially J-shaped cross section, so that the fitting groove 7 into which the outer circumferential surface of the opening of the drum body 2A fits, and a curved surface with a small curvature, are formed on each drum head. It has an edge part a that supports the peripheral parts of 3A and 3B.

The supporting and tensioning means 4 is fitted into a pair of upper and lower head frames 9a and 9b that are fitted around the outer periphery of the opening of the drum head 2 and hold the periphery of each drum head 3A and 3B, and is fitted onto the outer periphery of each head frame 9a and 9b. The head frame 9
A pair of upper and lower clamping frames 10a and 10b that respectively press a and 9b toward the center of the body 2, and a plurality of lugs 11 arranged at predetermined intervals around the outer periphery of the body 2.
and the respective clamping frames 10a, 10b are connected to the respective lugs 11.
It is composed of a plurality of tightening bolts 12, a lug mounting plate 6, etc. that are fixed to the holder. The lug 11 is made of zinc die-casting or the like, and has through holes 14a and 14b formed in its upper and lower surfaces, respectively.
One ends of a and 13b are loosely inserted into the inside of the lug 11 to prevent them from coming off. Each lug nut 13
a and 13b are biased by springs 15a and 15b, respectively, in the direction of protruding from the lug 11, and are threadedly connected to the tightening bolts 12 attached to the respective tightening frames 10a and 10b, respectively.

The lug mounting plate 6 is disposed corresponding to each lug 11, and its upper and lower ends are attached to each of the rims 2B, 2B or each rim 2B, by means of the setscrews 5.
2B is fixed to the trunk main body 2A, and the portion other than this fixed portion is spaced apart from the trunk main body 2A.
Then, the lug 11 is attached to the surface of the lug mounting plate 6.
is firmly fixed by a set screw 16.
Therefore, the lug 11 and the trunk body 2A are spaced apart from each other.

The tension of each drum head 3A, 3B is adjusted by rotating each tightening bolt 12, and each tightening frame 10a, 10 is adjusted by rotating each tightening bolt 12.
The timbre and pitch of the drum 1 are adjusted individually by moving the drum 1 up and down, thereby changing the tone and pitch of the drum 1.

Here, the lugs 11 are the upper and lower clamping frames 10a, 10b.
It is not limited to those commonly used for the lug mounting plate 6, but is also manufactured separately and independently for each clamping frame 10a, 10b, as shown in FIG. 2, and is commonly fixed to one lug mounting plate 6. It may be. In addition, 4 in FIG. 1 is a nut, and 5 is a set screw.

In addition, the lug mounting plate 6 is attached to the rim 2 as shown in FIG.
It may be fixed with a set screw 5 to a nut 30 embedded in B, 2B.

Thus, according to the drum 1 having such a configuration, the drum 2 is composed of a drum main body 2A, a pair of upper and lower rims 2B,
2B, and each lug 11 is connected to each rim 2B, 2B.
Alternatively, the trunk body 2A is fixed to the overlapping part A of the trunk body 2A and each rim 2B, 2B via the lug attachment plate 6, and the lug 11 and the trunk body 2A are spaced apart.
vibrates well without being hindered by the lugs 11, and fully exhibits its function as a vibration resonator. Therefore, the volume and power of the sound increase, and the sustain becomes longer, improving the acoustic characteristics of the drum.

Also, since the lug 11 is attached to the body 2 via the lug attachment plate 6, the size of the lug attachment plate 6 should be adjusted to the body 2.
By changing the lug 11 according to the size of the drum, the lug 11 can be used in common for various drums of different sizes.
It is possible to make the lug 11 a common part.

[Effect of idea]

As explained above, the drum according to this invention is
The torso is composed of a torso body and a rim that is fitted and fixed to the open end of the torso body, and a plurality of lugs are arranged on the outer periphery of the torso body via a mounting plate, and the fixing part of this mounting plate is Since it is fixed to the rim or the overlapping part of the drum body and the rim, and the other parts are separated from the drum body, the drum body can be vibrated well without being affected by the lugs. It is possible to improve the acoustic characteristics of the Moreover, the structure is simple and manufacturing is easy.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of the main part showing one embodiment of the drum according to this invention, Fig. 2 is a side view showing another embodiment of the lug mounting plate and the lug, and Fig. 3 is another embodiment of this invention. FIG. 1... Drum, 2... Trunk, 2A... Trunk body, 2
B...Rim, 3A, 3B...Drum head, 4...
...Support tension means, 6...Lug mounting plate, 9a, 9b
...Head frame, 10a, 10b...Clamping frame, 11...
...Lug, 12...Tightening bolt, A...Overlapping part.

Claims (1)

[Scope of utility model registration request] a body consisting of a body and a rim that is fitted and fixed in an opening of the body and supports the peripheral edge of the drum head; a plurality of lugs disposed on the outer peripheral surface of the body through mounting plates; The mounting plate includes a clamping frame that presses a head frame that holds the peripheral edge of the drum head, and a plurality of clamping bolts that connect the clamping frame to each of the lugs, and the mounting plate on which each of the lugs is arranged is A drum characterized in that a fixing part is fixed to the rim part or an overlapping part of the drum body and the rim, while a portion other than the fixing part is spaced apart from the drum body.