RU178626U1 - DEVICE FOR IMPROVING SOUND OF A SHOCK MUSICAL INSTRUMENT - Google Patents

Abstract

The utility model relates to improving the sound of percussion musical instruments and can be used in the production of percussion musical instruments, such as cajon. The technical result is achieved by the fact that the faces of the casing and the intermediate insert are connected by vertical and horizontal struts, a whisker is fixed in the lower end of the vertical strut, into which a threaded rod is screwed in, secured with an end screw connection with a nut, lock nut and washer, and the threaded rod passes through the hole in the intermediate insert, at the end of the threaded rod, the adjustment knob is rigidly mounted, a whisker is fixed in the right end of the horizontal strut, into which a threaded rod, fixed mechanical snap connection with a nut, a lock nut, a washer, the threaded rod passes right through the opening face on which end is fixedly mounted adjustment knob. Adjust the knobs for the desired timbre. The use of the proposed device in the manufacture of percussion musical instruments, such as cajon, showed that the range of the timbre of sound and volume is higher than without tension of the front edge. 5 ill.

Description

The utility model relates to improving the sound of percussion musical instruments and can be used in the production of percussion musical instruments, such as cajon.

A percussion musical instrument is known, which is a resonator in the form of a box-shaped structure made of parts of plywood or plastic bonded to each other, having two side walls, a back wall on which a round hole is made, and a front working game wall-deck made of plywood or thick plastic no more than 5 mm, on the inside of which at least three parallel or V-shaped guitar strings are vertically attached with the ability to control their tension on the outside of the playing th wall, top cover and bottom wall, which are made of a thickness of at least 10 mm and have additional vertical fastening between each other in the form of an reinforcing stand placed inside the structure, the working game wall is covered on both sides with a removable sound-absorbing screen made of paper, film or veneers with a thickness of not more than 1 mm, and metal objects in the form of bells, plates or bells (RU 121394 U1) are attached to a vertical rack.

The known device is difficult to control and adjust the tension of the guitar strings from the outside of the playing wall, it is especially difficult to adjust in the field of bass sound (there is the sound of strings on a bass beat) and does not allow you to configure the cajon to sound completely without strings (bongo cajon).

Known percussion musical instrument (TWM 470357 U, Applicant Lin Shi-Zhong, publ. 01/11/2014) containing a hollow parallelepiped housing with a phase inverter in the form of a hole and six faces: lower, upper, left, right, rear and front deck , a binder with strings, a substrate and a gasket, a mechanism for adjusting the position of the substrate with a binder relative to the front deck.

However, all known constructions make it possible to adjust the timbre of an instrument only by changing the tension of the strings and the radius of the bass reflex.

The technical result consists in creating a simple mechanism for expanding the range of timbre and sound volume.

The technical result is achieved by the fact that the faces of the casing and the intermediate insert are connected by vertical and horizontal struts, a whisker is fixed in the lower end of the vertical strut, into which a threaded rod is screwed in, secured with an end screw connection with a nut, lock nut and washer, and the threaded rod passes through the hole in the intermediate insert, at the end of the threaded rod, the adjustment knob is rigidly mounted, a whisker is fixed in the right end of the horizontal strut, into which a threaded rod, fixed mechanical snap connection with a nut, a lock nut, a washer, the threaded rod passes right through the opening face on which end is fixedly mounted adjustment knob. To obtain the desired timbre, turn the control knobs.

The utility model is illustrated by a detailed description and illustrations, which depict:

FIG. 1 - percussion musical instrument - cajon (front view).

FIG. 2 - percussion musical instrument - cajon (view without frontal face / tapa), the option of arranging elements inside the instrument.

FIG. 3 - scheme of fastening the spacers to the right side of the cajon.

FIG. 4 is a diagram of the mounting of the spacer in the lower part of the cajon.

FIG. 5 - a mustache (mortise) nut.

The list of positions:

1 - frontal face (playing surface)

2 - back side

3 - upper edge

4 - right side

5 - left side

6 - sound hole (bass reflex)

7 - bottom face

8 - intermediate insert (upper edge of the bass reflex)

9, 10 - adjusting knob

11 - vertical strut

12 - horizontal strut

13 - washer

14 - nut

15 - locknut

16, 17 - mustache (mortise) nut

18 - threaded stud.

Percussion musical instrument (Fig. 1) contains a hollow body in the form of a parallelepiped with six faces: front 1, rear 2, top 3, right 4, left 5, bottom 7 sides, sound hole (phase inverter) 6 and intermediate insert 8.

The edges of the housing 4, 5, 3 and the intermediate insert 8 are connected by vertical 11 and horizontal 12 struts (Fig. 2). In the lower end of the vertical strut 11 (Fig. 2, 3), which abuts against the intermediate insert 8, a mustache nut 16 is fixed (Fig. 5), into which the threaded rod 18 is screwed. The threaded rod 18 is fixed by the end screw connection with the nut 15, the lock nut 14, the washer 13 (Fig. 2, 3). The threaded rod 18 passes through the hole in the intermediate insert 8, at the end of which the adjusting knob 9 is rigidly mounted. At the right end of the horizontal strut 12 (Fig. 4), which abuts against the right side 4, a mustache 17 is fixed (Fig. 5), in which the threaded rod 19 is screwed in. The threaded rod 19 is fixed by the end screw connection with the nut 15, the lock nut 14 and the washer 13. The threaded rod 19 passes through the hole of the right side 4, at the end of which the adjusting knob 10 is fixed (Fig. 4).

The device operates as follows.

The adjusting knobs 9, 10 (Figs. 2, 3, 4) rotate. The rotational movement is transmitted to the threaded rods 18, 19, as a result of which the rods move relative to the strut 12 and the strut 11 and the mortise (whisker) nut 16, 17 together with the nut 15, the lock nut 14 and the washer 13. When unscrewing the threaded rods 18, 19 from the mortise (whiskers) nuts 16, 17, the washer 13 abuts against the face of the tool and with further rotation of the handles 9, 10, the edges 3, 4, 5, 7 of the tool are moved apart from the initial state, thereby stretching the playing surface 1, rigidly fixed with the faces. The playing surface 1 is pulled using the adjusting knobs 9, 10 to the desired timbre.

The use of the proposed device in the manufacture of a percussion musical instrument, such as cajon, showed that by rotating the adjustment knobs it is possible to change the timbre range and sound volume due to the tension of the front edge (playing surface).

The proposed device is industrially applicable, simple to manufacture and does not require large expenditures, which allows to expand the range of musical percussion instruments with a wide range of sound.

Claims (2)

1. Device for improving the sound of a percussion musical instrument, containing a hollow body in the form of a parallelepiped with six faces: front, back, top, right, left, bottom and a sound hole, characterized in that the faces of the body and the intermediate insert are connected by vertical and horizontal spacers, a whisker is fixed in the lower end of the vertical strut, into which a threaded rod is screwed in, secured by an end corkscrew connection with a nut, a lock nut and a washer, the threaded rod passing through a hole in the intermediate insert, an adjustment knob is rigidly mounted on the end of the threaded rod, a whisker is fixed in the right end of the horizontal strut, into which a threaded rod is screwed in, secured with an end snap connection with a nut, lock nut, washer, and the threaded rod passes through the hole of the right side, on the end of which is rigidly mounted adjustment knob. 2. The device according to p. 1, characterized in that to obtain the desired sound tone, rotate the adjustment knobs.

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