JP2744892B2 - Music drums - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a music drum,
More specifically, the present invention relates to a drum structure using a supporting edge having a synthetic resin material edge provided at one or both ends of a drum shell.

[0002]

2. Description of the Related Art The structure of music drums is changing. A typical drum has a cylindrical drum shell and a drum head provided at one or both ends. A latch or some other suitable device is used to secure the drumhead to the end of the shell and to tension the head to provide the desired interrogation. Drum shell is metal, wood,
It has been constructed from various materials such as fiber materials.

[0003] Current drum shells employ a composite structure having a shell formed of pressed or laminated fiber material to provide basic stiffness and sound quality, and the shell has a good appearance. To have a suitable external coating.

[0004] Drum shells made of various woody and composite materials, such as fibers and fiberglass, tend to collapse at or along the edges of the shell to which the drumhead is attached and pulled. Edge collapse usually occurs as a result of the stress concentration built up in the area caused by the tensioning process and the constant banging of the drumstick over the drumhead surface. Crushed edges usually appear as cracks and distortions. The fiber laminate may begin to peel, resulting in a weaker edge. When this happens, the sound quality of the instrument begins to become extremely poor.

[0005] In order to solve these problems, attempts have been made to provide a cylindrical ring inside the shell at or near the top to provide rigidity to the end of the shell. A thicker shell could have been used, but the increased thickness would actually add to the weight of the shell, so the weight of this drum makes it possible for drummers, such as children, to carry the drum in parades. It becomes difficult. Efforts have also been made to use metal retaining edges that fit the shape of one or both ends of the drum shell. However, metal is a relatively heavy material, which adds to the weight of the instrument and makes it more difficult to play, for example, carrying drums in a marching band. Further, the metal holding edge has been required to appropriately fix the metal to the drum shell by using screws, nails or the like. Therefore, the process of using the metal holding edge is an extremely difficult operation, which substantially adds to the manufacturing cost of the device.

[0006] The deterioration of the edge of drum shells made of wood and fiber materials as described above is not the only obstacle associated with these materials. Edges assembled from these require a significant amount of work, sanding and shaping to produce edges that can effectively support the drumhead and promote the instrument to produce its most desirable timbre. I do. The steps involved in the manufacture of a drum shell using wood or a suitable fiber material, such as the metal holding edges described above, are also extremely difficult operations.

Accordingly, it can be assembled using techniques that do not require a lot of work, can maintain its uniformity and structural integrity over time, and can continuously apply the tensioning process and the drum head surface. There is a need in the art to provide a retaining edge that constantly withstands the deterioration typically caused by the high stresses on the edge caused by tapping.

[0008]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an improved drum structure.

It is another object of the present invention to provide an improved support edge at one or both ends of a drum shell made of wood, fiber, fiberglass, plastic, or the like.

[0010] Another object of the present invention is to provide an improved support edge, preferably substantially inverted "V" shaped, attached to the end of the drum shell to reinforce the end of the drum shell. , To provide a low friction edge to stretch the drumhead.

Yet another object of the present invention is to provide an improved support edge glued to one or both ends of a drum shell so as to maintain shape uniformity and structural integrity over time. It is to be.

[0012]

SUMMARY OF THE INVENTION The present invention solves the above problems not addressed by the prior art and enhances the sound produced on the drum. The present invention provides a molded resin support edge or base, which is secured to the end of a drum shell, preferably formed of wood, fiber, fiberglass, etc., in a conventional molding process. Has a substantially inverted "V" shape. The drumhead is essentially properly tensioned against the apex of the supporting edge. The molded resin support edge reinforces the shell end and eliminates the tendency of the drumhead to diminish in tension. The edges clarify the sound produced by the drum and maintain flat or line contact on the underside of the drumhead. The present invention also provides an edge with minimal friction, which allows the drumhead to be easily tensioned. You have selected the inverted "V" shape, but the vertices are shifted to one side or the other (inward or outward radially from the centerline of the edge), are slightly rounded,
Or almost any other edge shape can be applied, including warped shapes such as being flat.

Thus, the present invention significantly increases the strength of the drum and imparts desirably improved sound characteristics. The invention also provides that the opposite end of the inverted "V" is
Plane, which is essentially the surface of the drum shell.
Secured to a flat end.

The above and other objects and features of the present invention will be better understood through the embodiments described below with reference to the drawings.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows several sets of conventional latches 13, 1
4 shows a conventional cylindrical drum shell 10 having an upper drum head 11 and a lower drum head 12 attached to the drum shell 10. US Patent 3,
No. 647,931 shows one form of an exemplary drum of the prior art.

The drum shell is made of a variety of materials, including metal, wood, fibrous materials, including wood fibers, paper and / or glass fiber fibers that are molded or laminated to form a composite structure, and plastics. The present invention relates to drums having drum shells of non-metallic construction, including drum shells of wooden, plastic, fibrous and various other non-metallic types, but for convenience the "fibre" drum shell or "fibre" Drum shells having the structure "" are referred to in the examples and the claims. However, in appropriate circumstances, the invention applies to metal drum shells and drum shells made of various other materials.

FIG. 2 shows a typical composite drum shell 19 having a fiber shell 20 with a plastic outer cover 21.
FIG. Shell 20 is conventional and consists of wood fibers in the form of a fiber tube. In a typical structure,
Using a paper fiber material having multiple layers of stacks pressed together, this structure is approximately 4.8 mm (3/16
Inches) wall thickness. Plastic outer layer 2
1 can be of any suitable thickness or of any color, and this layer 21 is primarily for protecting the appearance and the outer surface of the shell 20. Preferably, layer 21 covers substantially the entire outer surface of shell 21.

When firmly fixing the drumhead to the end of a conventional fiber shell 20, it is necessary and often necessary to substantially extend the head using a conventional tensioning mechanism. When doing so, it is common for the edge of the shell to deteriorate, distort, and eventually collapse, over time. Edge deterioration is accelerated as a result of the constant hitting of the drumhead surface with a drumstick. In a drum shell made by the method of the prior art, an inverted version of "V" (not shown)
It has been applied to the ends of wooden shells to minimize the edge friction of the drumhead shell. However, the thin vertices of the edge are relatively brittle, which further contributes to the collapse of the edge of the shell. Due to this exacerbation problem, some fiber shells will soon begin to emit dull or unpleasant overtones that deviate from the overall sound quality of the instrument.

FIG. 3 shows a molded resin support edge 22 of the present invention. The molded resin support edge 22 has an inverted “V” shape, and extends downward from the apex toward the pair of hem portions 30 and 31. As shown in FIG. 4, the shape of the edge 22 can be such that the vertex 24 is shifted to one side or the other side, and as shown in FIG. 5, the shape of the edge 22 can be rounded. Although not shown, it can be somewhat flattened if desired. The support edge 22 is secured to the end 26 of the fiber shell 20 by a natural bond that occurs between the outer surface of the end 26 and the underside of the support edge 22 during the molding process. Lower side of support edge 22 and end 26
An adhesive (not shown) such as an epoxy resin supplied between the shell 20 and the outer surface of the shell 20.
Some other suitable means of fixing to is normally not necessary. The bond between the support edge 22 and the outer surface of the end 26 is further enhanced by a constant downward pressure applied to the end 22 and to the end 26 by tensioning the drumhead with a tensioning mechanism. Can be The other end (not shown) of the shell 20 as shown in FIG. 2 may have a similar structure and a molded resin support edge 22 provided thereon.

Any suitable resin material can be used to mold the molded resin support edge 22, but any conventional injection molding using the compound polyurethane or polyurea can be used. It has been found appropriate to shape the edge 22 into the shape shown in FIGS. 3-5 using a process.
The molded resin support edge 22 extends completely around the end 26 of the shell 20 so that substantially continuous line contact is made by the apex 24 of the support edge 22 and continues over the entire end 26. A round shape is provided. This gives a flat surface, in other words a circular line contact with the underside of the drum head, so that the flatness of the contact portion of the edge of the head is maintained.

Accordingly, a key feature of the present invention is the use of a molded resin support edge in the fiber drum shell, preferably with the edge having a substantially inverted "V" cross-section. That is. This structure is very strong in terms of strength, so this support edge can damage the drum head early, even if the drumhead is tensioned around a standard-thick fiber shell. It turns out there is no possibility. The support edge 22 made in accordance with the present invention also provides an instrument that produces a clearer and sharper sound while preventing catastrophic and consequent overall collapse.

[0022]

According to the present invention, the addition of a molded resin support edge 22 allows the shell 20 to be
Is mechanically reinforced both radially and axially. The plane formed by the support edge at the vertex 24 is kept flat, and the shape of the support edge is perfect and complete, so that the portion surrounded by the shell is kept circular. The apex 24 provides a single circular line contact point, essentially to the underside of the drumhead. The drum thus obtained produces a more variable and reliable frequency, and the resulting sound is considered to be more audibly acceptable.

While the present invention has been described in terms of a particular preferred embodiment, it will be understood that it is not intended to limit the invention to this particular embodiment. Rather, it is intended to cover all modifications, improvements, and equivalents that fall within the spirit and scope of the invention as defined by the appended claims.

[Brief description of the drawings]

FIG. 1 is a perspective view of a conventional drum incorporating the concept of the present invention.

FIG. 2 is a cross-sectional view of the drum shell of the present invention before fixing a molded support edge.

FIG. 3 is a cross-sectional view of a drum shell end of the present invention having a substantially inverted "V" shaped molded support edge secured to the end of the shell.

4 similar to FIG. 3 of the drum shell end of the present invention, having a substantially inverted "V" shaped molded support edge secured to the end of the drum shell and having a vertex offset to one side; It is sectional drawing.

5 is a cross-sectional view of the drum shell end of the present invention as in FIG. 3, having a molded support edge secured to the end of the drum shell and having a shape that is rounded along the top surface.

[Explanation of symbols]

 Reference Signs List 10 drum shell 11 upper drum head 12 lower drum head 13, 14 latch 19 drum shell 20 fiber shell 22 support edge 26 end 30, 31 hem

 ──────────────────────────────────────────────────の Continuation of the front page (73) Patent holder 595028731 12804 Rayer Street, North Hollywood, California 91605, United States of America (56) Reference JP-A-60-230700 (JP, A) 53-101413 (JP, A) JP-A-55-64286 (JP, A) JP-A-8-69280 (JP, A) JP-A-57-70291 (JP, U) JP-A-54-55320 (JP, A) U) Japanese Utility Model 1979-134016 (JP, U) Japanese Utility Model 58-109790 (JP, U) Japanese Utility Model 60-169689 (JP, U) Japanese Utility Model Utility Model 1-101293 (JP, U) Japanese Utility Model 63 −36384 (JP, Y2) Jikken Sho 63-50714 (JP, Y2) Special table Hei 8-502838 (JP, A)

Claims (13)

(57) [Claims] 1. A substantially cylindrical drum shell having at least one end to which a drumhead is to be mounted, fixed to said end substantially continuously around said end,
A support edge made of a resin material having an outer shape substantially providing a vertex adapted to contact and support the drum head, the vertex side of said support edge having an inverted "V"shape; Said
A drum for music , wherein the other end of the supporting edge is flat . 2. The music drum according to claim 1 , wherein said end of said shell is substantially flat and is molded with said support edge in contact with said shell. 3. The music drum according to claim 1, wherein said resin material is made of polyurethane. 4. The music drum according to claim 1, wherein said resin material is made of polyurea. 5. The music drum according to claim 1, wherein the drum shell has a fiber structure. 6. A cylindrical drum shell made of a fibrous structure having at least one end to which a drumhead is to be mounted, fixed to said end substantially continuously around said end,
One end of the substantially inverted "V" shape is adapted to have the apex of the "V" shape contact and support the drumhead.
And a supporting edge made of a molded material having an outer shape having the other end of the surface . 7. A substantially cylindrical drum shell made of a fibrous structure having at least one end to which a drumhead is to be mounted, secured to said end substantially continuously around said end. ,
A support edge made of a molded resin material having an outer shape having one end of a substantially inverted "V" shape and the other end of a plane, the one end being a vertex; A music drum, comprising: 8. The method according to claim 1, wherein said end of said shell is substantially flat in shape, and said support edge is continuously mounted around said end of said shell and is fixed to said end. The music drum according to claim 7, wherein: 9. A substantially cylindrical drum shell made of a fibrous structure having at least one substantially flat shaped end to which a drumhead is to be mounted, and said end being continuous around said end. is fixed to the section, one end has a substantially reverse "V" shape, a <br/> supporting edge the other end is flat, the other end side end portion having said plane said end of said shell Attached and engaged close to the part,
A support edge fixed to an end of the shell, thereby forming a circular portion where the top supports and contacts the drum head; and a drum stretched from the apex of the support edge and fixed to the drum shell. A music drum having a head. 10. A substantially cylindrical drum shell made of a fibrous structure having at least one end to which a drumhead is to be attached, secured to said end substantially continuously around said end. ,
Outside has a substantially flat shape, it supports edge der made of resin material molded, one end opposite "V"
A music drum, comprising: a support edge that is a vertex of a character shape and the other end side is a plane; and a drum head that extends from the vertex of the support edge. 11. A substantially cylindrical drum shell made of a fibrous structure having at least one end to which a drumhead is to be attached, secured to said end substantially continuously around said end. ,
Outside has a substantially rounded shape, it supports edge der made of resin material molded, one end opposite
The support edge is a vertex of a “V” shape and the other end is flat.
And a drum head stretched from the apex of the support edge. 12. A substantially cylindrical drum shell having at least one end to which a drumhead is to be mounted, fixed as a discrete component substantially continuously around said end. A molded support edge having a shape that substantially provides an apex on one end to contact and support the drum head, and a molded support edge that is flat on the other end. Music drum. 13. A substantially cylindrical drum shell made of a fibrous structure having at least one end to which a drumhead is to be attached, and substantially continuous with said end about said end. It is fixed and has an inverted “V” -shaped vertex at one end and a flat end at the other end.
A substantially distorted inverted "V" -shaped profile having a shape that is a surface and wherein the apexes are offset to one side or the other to contact and support the drumhead. And a support edge made of a material molded in a mold.