A folk drum with fixed pitch

Abstract

The utility model discloses a can fixed tone's civilian drum, it includes: drum barrel, the upper and lower two sides symmetry of drum barrel are covered with skin, one side of skin relative all is fixedly connected with the thimble, the inboard of thimble all is with drum barrel upper and lower sliding fit, one side of thimble relative all is inlayed fixedly with the sleeve hoop, the inboard of sleeve hoop all corresponds with drum barrel nest fixedly, the outside of thimble all is erected with extrusion ring, the inboard of extrusion ring corresponds with thimble sliding contact, the opposite side of extrusion ring corresponds with skin extrusion fit, utilize extrusion ring to push up skin and form the taper inclined plane between the drum barrel outer edge and thimble to make it correspond to occur elastic bending deformation, and then indirectly to the skin of drum barrel inner edge 360's outer expansion tight adjustment, and this kind of adjustment drum surface tightness degree's mode is softer, and the skin is not easy to break, and its drum surface tightness degree adjustment range is more accurate, and the corresponding pitch adjustment is more accurate and comprehensive.

Description

Technical Field

[0001] This utility model relates to the field of percussion instrument technology, and in particular to a folk drum that can be tuned. Background Technology

[0002] The timpani is a percussion instrument consisting of a drumhead, a drum body, and drumsticks. The timpani is the cornerstone of a band or symphony orchestra. The timpani consists of a brass or copper resonator (shaped like a basin), on which a calfskin or plastic drumhead is stretched taut. The drumhead is fixed by a wooden ring and then secured with a metal ring, and the tightness can be adjusted with several screws. The player uses this to adjust the pitch of the timpani. The jar drum, also known as the ethnic timpani, is a new type of percussion instrument that was modified from the jar drum and incorporated the pitch characteristics of the Western timpani.

[0003] The common tuning method for folk drums is similar to that of Western timpani. Both adjust the pitch by pulling the drumhead tension downwards using a ring array of screws and threaded seats. However, this method of pulling the drumhead directly along its edge is quite direct, resulting in high stress on the tensioned surface. This can easily lead to cracking and loss of elasticity, damaging the instrument. Furthermore, the displacement adjustment of the corresponding tuning screws is not proportional to the change in drumhead tension, resulting in relatively low adjustment precision. Utility Model Content

[0004] The purpose of this invention is to provide a folk drum that can be tuned, which can indirectly adjust the tension of the drumhead skin in 360° outward. This method of adjusting the tension of the drumhead is relatively gentle and less likely to crack the skin. Furthermore, the displacement of the compression ring is proportional to the change in the tension of the skin, resulting in a more precise range of tension adjustment and more accurate and comprehensive pitch adjustment.

[0005] To achieve the above objectives, a folk drum capable of tuning is provided, comprising: a drum body, the upper and lower sides of which are symmetrically covered with skin surfaces; a collar is fixedly connected to the opposite side of each skin surface; the inner side of each collar slides and fits against the drum body; a hoop is fitted and fixed to the opposite side of each collar; the inner side of each hoop is nested and fixed to the drum body; a compression ring is mounted on the outer side of each collar; the inner side of each compression ring slides in contact with the collar; the opposite side of each compression ring is pressed and fitted against the skin surface; a plurality of rotating shafts are rotatably connected in a circular array to the opposite side of each compression ring; a tuning threaded rod is fixedly connected to the upper and lower opposite ends of each rotating shaft; the tuning threaded rod passes through the hoop and is threadedly connected to it; the tuning threaded rod... Tuning knobs are fixedly connected to the upper and lower ends of the drumhead. First, the drumhead is covered with the leather, and then its outer edge is fixed with a collar and fitted onto the corresponding hoop. The hoop is set up near the upper and lower middle parts of the drumhead. Then, a compression ring is set up on the outside of the collar and its vertical linear displacement is adjusted. The compression ring pushes the leather surface upward on the conical slope formed between the outer edge of the drumhead and the collar, causing it to elastically bend and deform. This indirectly adjusts the leather surface of the inner edge of the drumhead 360° outward expansion and tightening. This method of adjusting the tightness of the drumhead is relatively gentle and does not easily crack the leather surface. Moreover, the displacement of the compression ring is proportional to the change in the tightness of the leather surface, resulting in a more precise range of adjustment for the tightness of the drumhead and more accurate and comprehensive pitch adjustment.

[0006] According to the aforementioned folk drum capable of tuning, the outer surface of each tuning knob is surrounded by an anti-slip rubber sleeve, and an internal hexagonal groove is formed at the center of the opposite end of each tuning knob. This prevents slippage when turning to tune.

[0007] According to the aforementioned folk drum capable of tuning, several sliding sleeves are fixedly arranged in a circular array on opposite sides of the hoop. These sliding sleeves and tuning threaded rods are equidistantly distributed around the outer side of the drum body. Springs are fitted inside each sliding sleeve, and limiting slide rods are fixedly connected to opposite ends of each spring. These limiting slide rods slide vertically with the sliding sleeves, and their opposite ends slide through the hoop and are fixedly connected to a compression ring. This assists in tightening the drumhead, maintaining uniform drumhead tension.

[0008] According to the aforementioned folk drum capable of tuning, the outer side of the tuning threaded rod is threaded with elastic washers, and the opposite sides of the elastic washers are elastically pressed and fitted against the sleeve. This helps to tighten the tuning threaded rod and the sleeve, preventing them from loosening.

[0009] According to the aforementioned folk drum capable of tuning, the outer center of the drum body is concave, and both the upper and lower outer edges of the drum body are rounded, with a sliding membrane covering the corresponding rounded corner surfaces. The sliding membrane slides and adheres to the skin surface. A smooth contact treatment is applied to the portion of the skin surface that is taut and slides against the drum body.

[0010] According to the aforementioned folk drum capable of tuning, the outer surface of the compression ring is polished and coated with a layer of lubricant. This makes it smoother when it is compressed into the leather surface, reducing frictional wear.

[0011] The above-mentioned solution has the following beneficial effects:

[0012] In this invention, the drumhead is first covered with a leather strap, and its outer edge is fixed by a collar and fitted onto a hoop. The hoop is positioned near the upper and lower middle parts of the drumhead. Then, a compression ring is placed on the outside of the collar and its vertical linear displacement is adjusted. The compression ring pushes the leather strap upwards, causing the tapered slope formed between the outer edge of the drumhead and the collar to undergo elastic bending deformation. This indirectly adjusts the tightness of the leather strap along the inner edge of the drumhead in a 360° outward expansion and contraction. This method of adjusting the tightness of the drumhead is relatively gentle and less prone to cracking. Furthermore, the displacement of the compression ring is proportional to the change in the tightness of the leather strap, resulting in a more precise range of adjustment for the tightness of the drumhead and more accurate and comprehensive pitch adjustment.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram of a folk drum that can be tuned according to the present invention;

[0016] Figure 2 This is a schematic diagram of the covering of the skin surface of a folk drum that can be tuned according to this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure between the tuning threaded rod and the limiting slide rod in a folk drum that can be tuned to a specific pitch according to this utility model.

[0018] Figure 4 This is a schematic diagram of the connection structure between the limiting slide rod and the sliding sleeve in a folk drum that can be tuned according to this utility model.

[0019] Legend:

[0020] 1. Drum barrel; 2. Leather surface; 3. Collar; 4. Hoop; 5. Extrusion ring; 6. Shaft; 7. Tuning threaded rod; 8. Tuning knob; 9. Limiting slide rod; 10. Sliding sleeve; 11. Spring; 12. Elastic screw washer. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figure 1-4 This utility model provides a folk drum that can be tuned, including: a drum body 1, with skin surfaces 2 symmetrically covered on the upper and lower sides of the drum body 1. A collar 3 is fixedly connected to the opposite side of each skin surface 2. The inner side of each collar 3 slides and fits against the drum body 1. A hoop 4 is fitted and fixed to the opposite side of each collar 3. The inner side of each hoop 4 is nested and fixed to the drum body 1. A compression ring 5 is provided on the outer side of each collar 3. The inner side of the compression ring 5 slides and contacts the collar 3. The opposite side of the compression ring 5 is pressed and fits against the skin surface 2. The compression ring 5 pushes the skin surface 2 upward to form a conical inclined surface between the outer edge of the drum body 1 and the collar 3, causing it to elastically bend and deform, thereby indirectly adjusting the outer expansion and tightening of the skin surface 2 on the inner edge of the drum body 1 by 360°.

[0023] On one side of the compression ring 5, a ring array is rotatably connected to several rotating shafts 6. Each of the upper and lower opposite ends of the rotating shaft 6 is fixedly connected to a tuning thread rod 7. Each of the tuning thread rods 7 passes through the sleeve 4 and is threaded to it. Each of the upper and lower opposite ends of the tuning thread rod 7 is fixedly connected to a tuning knob 8. Each of the outer surfaces of the tuning knob 8 is surrounded by a non-slip rubber sleeve. Each of the opposite ends of the tuning knob 8 has an internal hexagonal groove at its center. The screw thread is retracted to control and adjust the tightness of the drumhead and adjust the pitch accordingly.

[0024] On one side of the sleeve 4, several sliding sleeves 10 are fixedly embedded in a circular array. The sliding sleeves 10 and the tuning threaded rod 7 are distributed equidistantly around the outside of the drum barrel 1. The inner side of each sliding sleeve 10 is equipped with a spring 11. The upper and lower opposite ends of each spring 11 are fixedly connected to a limiting slide rod 9. The limiting slide rod 9 slides and engages with the sliding sleeve 10, and its upper and lower opposite ends slide through the sleeve 4 and are fixedly connected to the compression ring 5. The outer side of the tuning threaded rod 7 is threaded with an elastic washer 12. The upper and lower opposite sides of the elastic washer 12 are elastically compressed and adhered to the sleeve 4 to help tighten the drumhead and maintain uniform drumhead tension. In addition, it helps to press the tuning threaded rod and the sleeve to prevent them from loosening.

[0025] The outer center of the drum barrel 1 is concave. The outer edges of the upper and lower ends of the drum barrel 1 are rounded, and a layer of sliding film is covered on the corresponding rounded corner cut surface. The sliding film slides and fits against the leather surface 2. The outer surface of the extrusion ring 5 is polished and coated with a layer of lubricant to smooth the sliding contact part of the leather surface 2 and reduce friction loss.

[0026] Working principle: In this invention, the drumhead 2 is first wrapped around the drum barrel 1, and its outer edge is fixed by the collar 3 and correspondingly fitted and fixed on the hoop 4. The hoop 4 is respectively set near the upper middle and lower middle parts of the drum barrel 1. Then, the compression ring 5 is set on the outside of the collar 3 and its vertical linear displacement is adjusted. The compression ring 5 pushes the tapered inclined surface formed between the outer edge of the drum barrel 1 and the collar 3, causing it to elastically bend and deform. This indirectly adjusts the tension of the drumhead 2 at the inner edge of the drum barrel 1 in a 360° outward expansion and contraction. This method of adjusting the tension of the drumhead is relatively gentle and is not easy to break the drumhead 2. Moreover, the displacement of the compression ring 5 is proportional to the change in tension of the drumhead 2, so the tension adjustment range of the drumhead is more precise and the corresponding pitch adjustment is more accurate and comprehensive.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A type of folk drum capable of setting pitch, comprising: A drum barrel (1), characterized in that the upper and lower sides of the drum barrel (1) are symmetrically covered with leather surfaces (2), and each leather surface (2) is fixedly connected to a collar (3) on the opposite side. The inner side of each collar (3) slides and fits against the drum barrel (1) vertically. Each collar (3) is fitted and fixedly fitted with a hoop (4) on the opposite side. The inner side of each hoop (4) is nested and fixedly fitted against the drum barrel (1). Each collar (3) is supported by a compression ring (5). The inner side corresponds to the sliding contact with the collar (3), and the opposite side of the extrusion ring (5) corresponds to the extrusion and fits against the leather surface (2). The opposite side of the extrusion ring (5) is connected to several rotating shafts (6) in a ring array. The upper and lower opposite ends of the rotating shafts (6) are fixedly connected to tuning thread rods (7). The tuning thread rods (7) pass through the collar (4) and are threaded to it. The upper and lower opposite ends of the tuning thread rods (7) are fixedly connected to tuning knobs (8).

2. A folk drum capable of tuning according to claim 1, characterized in that, The outer surface of each tuning knob (8) is surrounded by an anti-slip rubber sleeve, and an internal hexagonal groove is provided at the center of the opposite end of each tuning knob (8).

3. A folk drum capable of tuning according to claim 1, characterized in that, On one side of the sleeve (4), several sliding sleeves (10) are fixedly fitted in a ring array. The sliding sleeves (10) and the tuning thread rod (7) are distributed equidistantly around the outside of the drum (1). The inner side of each sliding sleeve (10) is equipped with a spring (11). The upper and lower ends of each spring (11) are fixedly connected to a limiting slide rod (9). The limiting slide rod (9) slides and engages with the sliding sleeve (10) in a sliding manner, and its upper and lower ends slide through the sleeve (4) and are fixedly connected to the compression ring (5).

4. A folk drum capable of tuning according to claim 1, characterized in that, The outer side of the tuning threaded rod (7) is threaded with an elastic threaded washer (12), and the upper and lower opposite sides of the elastic threaded washer (12) are elastically squeezed and fitted with the sleeve (4).

5. A folk drum capable of tuning according to claim 1, characterized in that, The outer middle of the drum barrel (1) is concave. The outer edges of the upper and lower ends of the drum barrel (1) are rounded and covered with a layer of sliding film on the corresponding rounded corner cut surface. The sliding film slides and fits against the leather surface (2).

6. A folk drum capable of tuning according to claim 1, characterized in that, The outer surface of the extrusion ring (5) is polished and a layer of lubricant is applied to it.

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