A sliding connecting rod, sand belt adjusting device, tambourine and tuning method of the tambourine

Abstract

The application provides a sliding connecting rod arranged at a bottom frame of a drum, comprising a main body part, a driving part and a transmission part, the driving part is connected at one end of the main body part and located outside a side plate of the drum, the transmission part is connected at the other end of the main body part and located below a bottom surface of the drum, wherein the main body part is in a curved shape to avoid a bottom corner formed by the bottom surface and the side plate. The sliding connecting rod provided by the application can avoid the bottom frame of the drum, the curved shape of the sliding connecting rod can bypass the bottom frame, the transmission part is located below the bottom surface of the drum, the driving part is located beside the side plate of the drum, and then the transmission part of the sliding connecting rod can be connected with a sand belt, so that the hand of a player can control the sliding connecting rod as long as the hand is beside the drum, and then the function of adjusting the tone is achieved. The application also provides a sand belt adjusting device, a drum and a tuning method of the drum.

Description

Technical Field

[0001] This invention relates to the field of musical instrument technology, and in particular to a sliding linkage, a sandpaper adjustment device, a drum, and a tuning method. Background Technology

[0002] Existing drums, such as the sander drum disclosed in CN209216572U, control the tension of the sander belt by setting an adjustment mechanism on the drumhead to adjust the tension of the sander belt, thereby achieving tone adjustment. However, in this technical solution, the sander belt runs through both ends of the entire drum base, which not only results in an excessively long sander belt, but also makes it prone to wear and breakage due to the bending stress required to connect the sander belt to the adjustment mechanism on the side of the drum, since the sander belt also needs to be bent.

[0003] Furthermore, existing drums can only adjust the tone by adjusting the tightness of the sand tape, but cannot adjust the tone by adjusting the distance between the sand tape and the drumhead. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a sliding link, a sand belt adjustment device, and a drum, which are set on the frame of the drum bottom, so that the sand belt does not need to go around the frame and the end of the sand belt is connected to the adjustment device on the side of the drum, thereby avoiding the problem of wear and breakage caused by the bending of the sand belt.

[0005] To solve the above-mentioned technical problems, the present invention provides a sliding linkage disposed at the bottom frame of a drum, comprising a main body, a driving part, and a transmission part. The driving part is connected to one end of the main body and located outside the side plate of the drum, and the transmission part is connected to the other end of the main body and located below the lower drum surface of the drum, wherein: The main body is curved to avoid the bottom angle formed by the lower drum surface and the side plate, and the drive part and the transmission part form an obtuse angle. The two ends of the connection between the drive unit and the main body are respectively provided with a first pivot shaft arranged coaxially; the two ends of the connection between the transmission unit and the main body are respectively provided with a second pivot shaft arranged coaxially, and the second pivot shaft is parallel to the first pivot shaft; The driving part is used to drive the driven component; the transmission part is used to connect with the sand belt connecting component.

[0006] Alternatively, the drive unit maintains an acute angle with the side plate during movement; the acute angle is not less than 30 degrees and not greater than 85 degrees. During the movement, the transmission part maintains a parallel or acute angle with the lower drum surface, and the acute angle is within ±5 degrees.

[0007] Alternatively, the driving part may be provided with a driving rod or a driving groove, the driving rod being perpendicularly connected to the driving part and parallel to the first pivot axis; the driving part may be a single rod or a parallel double rod structure, and when the driving part is a double rod structure, the driving rod is connected between the double rod structures; the driving groove is arranged along the longitudinal direction of the driving part.

[0008] Alternatively, the length of the drive rod is less than the distance between the two first pivot axes and less than the distance between the two second pivot axes; when the drive rod is projected onto the first pivot axis or the second pivot axis, both ends of the drive rod are located between the two first pivot axes or between the two second pivot axes.

[0009] Alternatively, the transmission part may be provided with bushings at both ends, which are connected to the sand belt connecting component. Correspondingly, the connecting end of the sand belt connecting component is provided with a hook connecting shaft, which is inserted into the bushing.

[0010] Alternatively, the main body may be plate-shaped, and the curvature of the main body may be arc-shaped, L-shaped, or irregular. When the curvature is arc-shaped, the arc does not exceed 1 / 2 of the circumference.

[0011] The present invention also provides a sanding belt adjustment device for adjusting the distance between the free end of the sanding belt and the lower drum surface of a musical drum. The device includes the sliding linkage, the driving component, a housing, and the sanding belt connecting component. The housing is fixed to the side plate of the musical drum. The housing has a key hole and irregularly shaped sliding groove plates located on both sides of the key hole. The driving component is installed in the key hole and can slide up and down along the key hole. The two irregularly shaped sliding groove plates are perpendicularly connected to the housing. The irregularly shaped sliding groove plates have a first groove and a second groove. A first pivot shaft is placed in the first groove, and a second pivot shaft is placed in the second groove. The first groove is located outside the side plate and has a continuously curved irregular structure. The second groove is located below the lower drum surface and is parallel to or slightly inclined to the lower drum surface. One end of the sanding belt connecting component is connected to the free end of the sanding belt, and the other end is pivotally connected to the transmission part of the sliding linkage.

[0012] When the driving part is driven by the driving member, the first pivot shaft and the second pivot shaft slide in the first slide groove and the second slide groove respectively, so that the bushing rotates up and down around the fixed end of the sand belt and keeps the distance between the bushing and the fixed end of the sand belt constant, thereby keeping the tension of the sand belt constant.

[0013] Alternatively, when the driving part is driven by the driving member, the first pivot shaft and the second pivot shaft slide in the first slide groove and the second slide groove respectively, so that the bushing rotates up and down around the fixed end of the sand belt as the axis, and the distance between the bushing and the fixed end of the sand belt increases or decreases, thereby increasing or decreasing the tension of the sand belt.

[0014] The driving component includes a hand-held block, a sliding groove, and an elongated support leg. The elongated support leg and the sliding groove are both connected to the side of the hand-held block near the drum. There are two sliding grooves, positioned on either side of the elongated support leg, and each sliding groove is L-shaped to form a groove with the hand-held block. When the driving component is installed in the keyhole of the housing, the hand-held block is located outside the keyhole, and the sliding groove is located inside the keyhole. The elongated support leg has a sliding groove structure for connection to the driving rod, or a driving shaft is mounted on the elongated support leg for connection to the driving groove. The up-and-down movement of the driving component is then transmitted to the driving part of the sliding connecting rod.

[0015] Alternatively, the driving component may be provided with a locking structure, which is connected to the housing; the locking structure includes spherical protrusions, which are disposed on both sides of the slide rail edge, and correspondingly, a plurality of positioning ball pits adapted to and connected to the spherical protrusions are provided on the inner side of the irregular slide rail plate.

[0016] The present invention also provides a drum, including a base frame, side plates, a lower drumhead, and a sand belt. The sand belt adjustment device described above is provided, wherein the fixed end of the sand belt is fixedly connected to the drum, and the free end of the sand belt is connected to the sand belt connecting component of the sand belt adjustment device; the sand belt adjustment device is fixedly connected to the base frame.

[0017] The bottom frame is provided with a notch that allows the sliding connecting rod to pass through, so as to further reduce the distance between the sand belt and the lower drum surface, and make the sand belt closer to the lower drum surface.

[0018] The sand belt adjustment device also includes a fastening cover, which is connected below the housing and the sliding connecting rod. The housing is supported on the bottom frame after passing through the tapping block at the front end of the fastening cover with a long support screw, thereby adjusting the distance between the housing and the bottom frame and thus adjusting the tension of the sand belt.

[0019] The fastening cover is also provided with a support foot at its rear end. The support foot and the tapping block are located on both sides of the bottom frame, and the support foot is located between the bottom frame and the sand belt connecting component.

[0020] The fixed end of the sand belt is fixedly connected to the bottom frame, and the free end of the sand belt is connected to the long flat hook of the sand belt connecting component.

[0021] The present invention also provides a method for tuning a drum, using the above-described sandpaper tuning device, comprising: Step 1: Provide a drum with the aforementioned abrasive belt adjustment device, the abrasive belt adjustment device having a first groove and a second groove with defined shapes, and a first pivot and a second pivot with defined distances; The second step is to drive the drive unit vertically to adjust its position on the housing. Third step: Under the drive of the driving member, the first pivot shaft and the second pivot shaft slide in the first slide groove and the second slide groove respectively. Fourth step: The driving component has multiple adjustment positions on the housing. When the driving component is adjusted to the corresponding adjustment position, the bushing of the sliding connecting rod rotates up and down only around the fixed end of the sand belt, so that the distance between the bushing and the fixed end of the sand belt remains unchanged, thereby keeping the tension of the sand belt constant and completing the tone adjustment of the drum.

[0022] The present invention also provides a method for tuning a drum, using the above-described sandpaper tuning device, comprising: Step 1: Provide a drum with the aforementioned abrasive belt adjustment device, the abrasive belt adjustment device having a first groove and a second groove with defined shapes, and a first pivot and a second pivot with defined distances; The second step is to drive the drive unit vertically to adjust its position on the housing. Third step: Under the drive of the driving member, the first pivot shaft and the second pivot shaft slide in the first slide groove and the second slide groove respectively. Fourth step: The driving component has multiple adjustment positions on the housing. When the driving component is adjusted to the corresponding adjustment position, the bushing rotates up and down around the fixed end of the sand belt as the axis, and at the same time increases or decreases the distance between the bushing and the fixed end of the sand belt, thereby increasing or decreasing the tension of the sand belt and completing the tone adjustment of the drum.

[0023] The sliding link provided by this invention can avoid the bottom frame of the drum. The bending shape of the sliding link can bypass the bottom frame. The transmission part is located below the lower drum surface of the drum, and the driving part is located on the side of the side plate of the drum. This allows the transmission part of the sliding link to be connected to the sand tape, so that the musician's hand can control the sliding link from the side of the drum, thereby achieving the function of adjusting the tone. The abrasive belt adjustment device provided by the present invention tightly fits the sliding connecting rod with the driving component and the housing. By selecting different shapes of the first sliding groove, it is possible not only to adjust the distance between the free end of the abrasive belt and the lower drum surface while keeping the abrasive belt tension constant, but also to adjust both the abrasive belt tension and the distance between the free end of the abrasive belt and the lower drum surface at the same time, thereby completing the adjustment of the drum tone.

[0024] The drum provided by this invention, using the above-mentioned sand belt adjustment device, can adjust the distance between the free end of the sand belt and the lower drum surface by selecting different shapes of the first and second slide grooves. This not only keeps the sand belt tension constant but also adjusts both the sand belt tension and the distance between the free end of the sand belt and the lower drum surface, thereby completing the adjustment of the drum's tone. Attached Figure Description

[0025] Figure 1 This is a structural appearance diagram of the present invention; Figure 2 This is a partially cutaway structural diagram of the present invention; Figure 3 This is a schematic diagram of the shell structure in this invention; Figure 4 This is a schematic diagram of the shell structure in this invention; Figure 5 This is a schematic diagram of the driving component in this invention; Figure 6 This is a schematic diagram of the sliding link in this invention; Figure 7 This is a schematic diagram of the structure of the sand belt connecting component in this invention; Figure 8 This is a schematic diagram of the fastening cover in this invention.

[0026] In the picture: 1. Sand belt adjustment device; 2. Driving component; 21. Slide groove retaining edge; 22. Spherical protrusion; 23. Slender support leg; 24. Hand-held block; 3. Sliding link; 31. Drive rod; 32. First pivot shaft; 33. Second pivot shaft; 34. Bushing; 35. Main body; 36. Drive unit; 37. Transmission unit; 4. Sand belt connecting parts; 41. Hook connecting shaft; 42. Long flat hook; 5. Fastening cap; 51. Tapping block; 52. Support foot; 6. Housing; 61. Keyhole; 62. Irregularly shaped slide plate; 63. First slide groove; 64. Second slide groove; 65. Positioning ball pit; 66. Fastening hole; 67. Mounting hole; 7. Sand belt; 8. Drum; 81. Base frame; 82. Side plate; 83. Lower drumhead; 84. Notch; 9. Long support screws. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] like Figure 1-8 As shown, this embodiment of the invention provides a sliding linkage 3, which is disposed at the bottom frame 81 of the drum 8. It includes a main body 35, a driving part 36, and a transmission part 37. The driving part 36 is connected to one end of the main body 35 and located outside the side plate 82 of the drum 8. The transmission part 37 is connected to the other end of the main body 35 and located below the lower drum surface 83 of the drum 8. The main body 35 is curved to avoid the bottom corner formed by the lower drum surface 83 and the side plate 82, and to make the drive part 36 and the transmission part 37 form an obtuse angle. So that after the sliding link 3 is installed on the drum 8, the curved shape of the main body 35 can provide sufficient space for the drive part 36 and the transmission part 37 to move, so that the sliding link 3 can rotate within a certain angle range under the action of the drive. The two ends of the connection between the drive unit 36 ​​and the main body 35 are respectively provided with a first pivot shaft 32 arranged coaxially; the two ends of the connection between the transmission unit 37 and the main body 35 are respectively provided with a second pivot shaft 33 arranged coaxially, and the second pivot shaft 33 is parallel to the first pivot shaft 32; the two pivot shafts can slide in the corresponding slide grooves, so that the sliding link 3 can also perform a certain range of translational movement while rotating, so as to compensate for the change in distance between the bushing 34 and the fixed end of the sand belt 7 caused by the rotation of the sliding link 3.

[0031] The drive unit 36 ​​is used to drive the driven component 2; the transmission unit 37 is used to connect with the sand belt connecting component 4.

[0032] The second pivot 33 in the lower part of the sliding link 3 is equivalent to the fixed fulcrum in the middle of the lever principle. The drive rod 31 of the drive part 36 is equivalent to one end of the long arm in the lever principle. The symmetrical sleeve 34 of the transmission part 37 is equivalent to one end of the short arm in the lever principle. Moving the long arm can make the short arm end obtain a slightly reverse displacement.

[0033] The sliding link provided by this invention can avoid the bottom frame of the drum. The bending shape of the sliding link can bypass the bottom frame. The transmission part is located below the lower drum surface of the drum, and the driving part is located on the side of the side plate of the drum. This allows the transmission part of the sliding link to be connected to the sand tape, so that the musician's hand can control the sliding link from the side of the drum, thereby achieving the function of adjusting the tone.

[0034] Alternatively, the drive unit 36 ​​maintains an acute angle with the side plate 82 during movement; the acute angle is not less than 30 degrees and not greater than 85 degrees. During the movement, the transmission part 37 maintains a parallel or acute angle with the lower drum surface 83, which is within ±5 degrees.

[0035] Alternatively, the drive unit 36 ​​may be provided with a drive rod 31 or a drive groove, the drive rod 31 being perpendicularly connected to the drive unit 36 ​​and parallel to the first pivot shaft 32; the drive unit 36 ​​may be a single rod or a parallel double rod structure, and when the drive unit 36 ​​is a double rod structure, the drive rod 31 is connected between the double rod structures; the drive groove is arranged along the longitudinal direction of the drive unit 36. In conjunction with the following embodiments, the drive rod 31 can cooperate with the sliding groove structure within the elongated support leg 23 to drive the drive unit 36 ​​of the sliding link 3; alternatively, the drive unit 36 ​​may also be provided with a drive groove, and correspondingly, a drive shaft is provided on the elongated support leg 23 of the drive member. In this embodiment, the drive member 2 drives the sliding link 3 through the connection of the sliding groove and the rod (shaft) structure.

[0036] Alternatively, the length of the drive rod 31 is less than the distance between the two first pivot axes 32 and less than the distance between the two second pivot axes 33; when the drive rod 31 is projected onto the first pivot axis 32 or the second pivot axis 33, both ends of the drive rod 31 are located between the two first pivot axes 32 or the two second pivot axes 33. This allows the force transmitted from the drive rod 31 to the first pivot axis 32 and the second pivot axis 33 via the main body 35 to better avoid the problem of overall force imbalance caused by a larger force on one side of the pivot axis; to solve this problem, it is best to position the drive rod 31 at the middle position between the two first pivot axes 32 when projected relative to the first pivot axis 32.

[0037] Alternatively, the transmission part 37 may be provided with bushings 34 at both ends, which are connected to the sand belt connecting part 4. Correspondingly, the connecting end of the sand belt connecting part 4 is provided with a hook connecting shaft 41, which is inserted into the bushing 34.

[0038] Alternatively, the main body 35 may be plate-shaped, and the curvature of the main body 35 may be arc-shaped, L-shaped, or irregular. When the curvature is arc-shaped, the arc does not exceed 1 / 2 of the circumference, thereby minimizing the space occupied while avoiding the bottom frame of the drum 8.

[0039] This invention also provides a sanding belt adjustment device 1 for adjusting the distance between the free end of the sanding belt 7 and the lower drum surface of the drum 8. It includes a sliding connecting rod 3, a driving component 2, a housing 6, and a sanding belt connecting component 4. The housing 6 is fixed to the side plate 82 of the drum 8. The housing 6 has a relatively complex structure; its main design features a key hole 61 and irregularly shaped sliding plates 62 located on both sides of the key hole 61. The driving component 2 is installed in the key hole 61 and can slide up and down along the key hole 61. The two irregularly shaped sliding plates 62 are perpendicular to the housing 6. The straight connection is provided with a first slide groove 63 and a second slide groove 64 on the irregular slide plate 62. The first pivot shaft 32 is placed in the first slide groove 63 and the second pivot shaft 33 is placed in the second slide groove 64. The first slide groove 63 is located outside the side plate 82 and has a continuously curved irregular structure. The second slide groove 64 is located below the lower drum surface 83 and is parallel to or slightly inclined to the lower drum surface 83. One end of the sand belt connecting component 4 is connected to the free end of the sand belt 7, and the other end is pivotally connected to the transmission part 37 of the sliding connecting rod 3.

[0040] The abrasive belt adjustment device provided by the present invention tightly fits the sliding connecting rod with the driving component and the housing. By selecting different shapes of the first sliding groove, it is possible not only to adjust the distance between the free end of the abrasive belt and the lower drum surface while keeping the abrasive belt tension constant, but also to adjust both the abrasive belt tension and the distance between the free end of the abrasive belt and the lower drum surface at the same time, thereby completing the adjustment of the drum tone.

[0041] When the drive unit 36 ​​is driven by the drive member 2, the first pivot shaft 32 and the second pivot shaft 33 slide in the first slide groove 63 and the second slide groove 64 respectively, causing the bushing 34 to rotate up and down around the fixed end of the sand belt 7, and keeping the distance between the bushing 34 and the fixed end of the sand belt 7 constant, thereby keeping the tension of the sand belt 7 constant. The sand belt adjustment device provided in this embodiment, through the structural design of two slide grooves, can keep the distance between the bushing 34 and the fixed end of the sand belt 7 constant when the two pivot shafts of the sliding connecting rod 3 move in the two slide grooves, thereby adjusting only the distance between the free end of the sand belt 7 and the lower drum surface, and thus adjusting the tone of the drum.

[0042] Alternatively, when the drive unit 36 ​​is driven by the drive member 2, the first pivot shaft 32 and the second pivot shaft 33 slide in the first slide groove 63 and the second slide groove 64 respectively, causing the bushing 34 to rotate up and down around the fixed end of the sand belt 7 as the axis, and increasing or decreasing the distance between the bushing 34 and the fixed end of the sand belt 7, thereby increasing or decreasing the tension of the sand belt 7. The sand belt adjustment device provided in this embodiment, through the structural design of two slide grooves, allows the two pivot shafts of the sliding connecting rod 3 to move within the two slide grooves, simultaneously adjusting the distance between the bushing 34 and the fixed end of the sand belt 7, as well as the distance between the free end of the sand belt 7 and the lower drum surface, thereby adjusting the tone of the drum.

[0043] The driving component 2 includes a hand-held block 24, a sliding groove retaining edge 21, and an elongated support leg 23. The elongated support leg 23 and the sliding groove retaining edge 21 are both connected to the side of the hand-held block 24 near the drum. There are two sliding groove retaining edges 21, which are located on both sides of the elongated support leg 23. The sliding groove retaining edges 21 are L-shaped to form a clamping groove structure with the hand-held block 24. When the driving component 2 is installed in the key hole 61 of the housing 6, the hand-held block 24 is located outside the key hole 61, and the sliding groove retaining edge 21 is located inside the key hole 61, so that the hand-held block 24 and the sliding groove retaining edge 21 can be clamped in the key hole 61 and can slide along the wall of the key hole. The elongated support leg 23 is provided with a sliding groove structure to connect with the driving rod 31, or a driving shaft is installed on the elongated support leg 23 to connect with the driving groove, so that the up and down movement of the driving component 2 is transmitted to the driving part 36 of the sliding connecting rod 3. The main function of the drive component 2 is to receive the force from the musician's hand, and to move up and down along the key hole 61, thereby driving the drive part 36 of the sliding link 3 through the slender support leg 23.

[0044] Alternatively, the drive component 2 is provided with a locking structure, which is connected to the housing 6. The locking structure includes a spherical protrusion 22, which is disposed on both sides of the slide rail edge 21. A spring is provided inside the spherical protrusion 22, and the spring force allows the spherical protrusion 22 to be compressed and then reset. Correspondingly, multiple positioning ball pits 65 that are adapted to and connected to the spherical protrusion 22 are provided on the inner side of the irregular slide rail plate 62. The spherical protrusion 22 can enter the positioning ball pits 65. There are usually more than three positioning ball pits 65, thereby realizing the adjustment of multiple different timbres.

[0045] The present invention also provides a drum 8, including a base frame 81, a side plate 82, a lower drum surface 83, and a sand belt 7 or more sand belt adjustment device 1. The fixed end of the sand belt 7 is fixedly connected to the drum 8, and the free end of the sand belt 7 is connected to the sand belt connecting component 4 of the sand belt adjustment device 1; the sand belt adjustment device 1 is fixedly connected to the base frame 81.

[0046] The drum provided by this invention is movably connected to the drive rod of a curved sliding link via a manually operated, up-and-down sliding drive component. The end of the sliding link is connected to the sand belt via a sand belt connecting component. Two sets of pivot shafts in the middle of the sliding link are respectively locked in arc-shaped and straight-shaped sliding grooves, which limit the bushing at the end of the sliding link to move in a straight up-and-down manner. Thus, by moving the sliding key up and down, one end of the sand belt connected to it can move along a straight line perpendicular to the lower drum surface, pressing against the drum surface, slightly separating from the drum surface, and completely separating from the drum surface. In this process, the tension of the sand belt can be adjusted or kept constant, thereby achieving the purpose of conveniently adjusting the tone of the drum.

[0047] The drum provided by this invention features a sliding linkage that avoids the bottom frame of the drum. The bending shape of the sliding linkage allows it to bypass the bottom frame. The transmission part is located below the lower drum surface, and the drive part is located to the side of the drum's side plate. This allows the transmission part of the sliding linkage to connect with the sanding belt, enabling the musician to control the sliding linkage from the side of the drum, thereby adjusting the tone. The sanding belt adjustment device tightly fits the sliding linkage with the drive component and the housing. By selecting different shapes of the first sliding groove, it is possible to adjust not only the distance between the free end of the sanding belt and the lower drum surface while maintaining the sanding belt tension, but also to simultaneously adjust both the sanding belt tension and the distance between the free end of the sanding belt and the lower drum surface, thus completing the adjustment of the drum's tone.

[0048] The drum provided by this invention, using the above-mentioned sand belt adjustment device, can adjust the distance between the free end of the sand belt and the lower drum surface by selecting different shapes of the first and second slide grooves. This not only keeps the sand belt tension constant but also adjusts both the sand belt tension and the distance between the free end of the sand belt and the lower drum surface, thereby completing the adjustment of the drum's tone.

[0049] The bottom frame 81 is provided with a notch 84 that allows the sliding connecting rod 3 to pass through, so as to further reduce the distance between the sand belt 7 and the lower drum surface 83, so that the sand belt 7 is closer to the lower drum surface 83, and can significantly reduce the height of the sand belt adjustment device protruding from the bottom frame.

[0050] The sand belt adjustment device 1 also includes a fastening cover 5, which is connected to the lower part of the housing 6 and the sliding connecting rod 3. The housing 6 is supported on the bottom frame 81 after the long support screw 9 passes through the tapping block 51 at the front end of the fastening cover 5, thereby adjusting the distance between the housing 6 and the bottom frame 81, and thus adjusting the tension of the sand belt 7.

[0051] The rear end of the fastening cover 5 is also provided with a support foot 52. The support foot 52 and the tapping block 51 are located on both sides of the bottom frame 81. The support foot 52 is located between the bottom frame 81 and the sand belt connecting part 4. The support foot 52 can provide a limiting function for the entire fastening cover 5, and prevent the tension of the sand belt 7 from increasing significantly when the long support screw 9 is turned out too much. It plays a protective role for the sand belt 7 and prevents the sand belt 7 from breaking due to excessive tension.

[0052] The fixed end of the sand belt 7 is fixedly connected to the bottom frame 81, and the free end of the sand belt 7 is connected to the long flat hook 42 of the sand belt connecting component 4.

[0053] This invention also provides two methods for tuning the drum, based on the different adjustment principles of the drums provided in the above embodiments: The first method for tuning a musical drum provided by this invention uses the above-mentioned sandpaper tuning device 1, comprising: Step 1: Provide a drum 8 with a sand belt adjustment device 1. The sand belt adjustment device 1 has a first groove 63 and a second groove 64 with defined shapes, and a first pivot shaft 32 and a second pivot shaft 33 with defined distances. The second step is to drive the drive component 2 vertically to adjust the position of the drive component 2 on the housing 6. Third step: Driven by the drive unit 2, the first pivot shaft 32 and the second pivot shaft 33 slide in the first slide groove 63 and the second slide groove 64 respectively. Fourth step: The drive component 2 has multiple adjustment positions on the housing 6. When the drive component 2 is adjusted in the corresponding adjustment position, the bushing 34 of the sliding link 3 rotates up and down only around the fixed end of the sand belt 7, so that the distance between the bushing 34 and the fixed end of the sand belt 7 remains unchanged, thereby keeping the tension of the sand belt 7 unchanged and completing the tone adjustment of the drum 8.

[0054] This invention also provides a second method for tuning a musical drum, using the above-mentioned sandpaper tuning device 1, comprising: Step 1: Provide a drum 8 with a sand belt adjustment device 1. The sand belt adjustment device 1 has a first groove 63 and a second groove 64 with defined shapes, and a first pivot shaft 32 and a second pivot shaft 33 with defined distances. The second step is to drive the drive component 2 vertically to adjust the position of the drive component 2 on the housing 6. Third step: Driven by the drive unit 2, the first pivot shaft 32 and the second pivot shaft 33 slide in the first slide groove 63 and the second slide groove 64 respectively. Fourth step: The drive component 2 has multiple adjustment positions on the housing 6. When the drive component 2 is adjusted in the corresponding adjustment position, the bushing 34 rotates up and down around the fixed end of the sand belt 7 as the axis. At the same time, the distance between the bushing 34 and the fixed end of the sand belt 7 increases or decreases, thereby increasing or decreasing the tension of the sand belt 7, thus completing the tone adjustment of the drum 8.

[0055] The above two methods of tuning the drum are mainly based on the structural changes of the first slide 63 and the second slide 64, so as to adjust the tension of the sand belt or keep the tension constant while adjusting the distance between the sand belt and the lower drum surface.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A musical drum (8), characterized in that, The device includes a base frame (81), side plates (82), a lower drum surface (83), a sand belt (7), and a sand belt adjustment device (1). The fixed end of the sand belt (7) is fixedly connected to the drum (8), and the free end of the sand belt (7) is connected to the sand belt connecting component (4) of the sand belt adjustment device (1). The sand belt adjustment device (1) is fixedly connected to the base frame (81). The sand belt adjustment device (1) is used to adjust the distance between the free end of the sand belt (7) and the lower drum surface of the drum (8), and includes a sliding connecting rod (3), a driving component (2), a housing (6), and the sand belt connecting component (4). A sliding link (3) is located at the bottom frame (81) of the drum (8), and includes a main body (35), a drive part (36), and a transmission part (37). The drive part (36) is connected to one end of the main body (35) and located outside the side plate (82) of the drum (8). The transmission part (37) is connected to the other end of the main body (35) and located below the lower drum surface (83) of the drum (8). The main body (35) is curved to avoid the bottom angle formed by the lower drum surface (83) and the side plate (82), and to make the drive part (36) and the transmission part (37) form an obtuse angle. The drive unit (36) and the main body (35) are connected at both ends with a first pivot shaft (32) arranged coaxially; the transmission unit (37) and the main body (35) are connected at both ends with a second pivot shaft (33) arranged coaxially, and the second pivot shaft (33) is parallel to the first pivot shaft (32); The drive unit (36) is used to drive the driven component (2); the transmission unit (37) is used to connect with the sand belt connecting component (4); The housing (6) is fixed to the side plate (82) of the drum (8). The housing (6) is provided with a key hole (61) and irregularly shaped sliding plates (62) located on both sides of the key hole (61). The driving member (2) is installed in the key hole (61) and can slide up and down along the key hole (61). The two irregularly shaped sliding plates (62) are vertically connected to the housing (6). The irregularly shaped sliding plates (62) are provided with a first sliding groove (63) and a second sliding groove (64). The first pivot shaft (32) is placed on the first sliding groove. In the groove (63), the second pivot shaft (33) is placed in the second slide groove (64), wherein the first slide groove (63) is located outside the side plate (82), and the first slide groove (63) is a continuously curved irregular structure. The second slide groove (64) is located below the lower drum surface (83) and is parallel to or at a slight angle to the lower drum surface (83). One end of the sand belt connecting component (4) is connected to the free end of the sand belt (7), and the other end is pivotally connected to the transmission part (37) of the sliding connecting rod (3).

2. The drum according to claim 1, characterized in that, During the movement, the drive unit (36) maintains an acute angle with the side plate (82); the acute angle is not less than 30 degrees and not greater than 85 degrees; During the movement, the transmission part (37) maintains a parallel or acute angle with the lower drum surface (83), the acute angle being within ±5 degrees.

3. The drum according to claim 1, characterized in that, The drive unit (36) is provided with a drive rod (31) or a drive groove. The drive rod (31) is perpendicularly connected to the drive unit (36) and is parallel to the first pivot shaft (32). The drive unit (36) is a single rod or a parallel double rod structure. When the drive unit (36) is a double rod structure, the drive rod (31) is connected between the double rod structures. The drive groove is arranged along the longitudinal direction of the drive unit (36). The length of the drive rod (31) is less than the distance between the two first pivot axes (32) and less than the distance between the two second pivot axes (33); when the drive rod (31) projects onto the first pivot axis (32) or the second pivot axis (33), the two ends of the drive rod (31) are located between the two first pivot axes (32) or between the two second pivot axes (33); The transmission part (37) is provided with bushings (34) at both ends, and is connected to the sand belt connecting component (4) through the bushings (34). Correspondingly, the connecting end of the sand belt connecting component (4) is provided with a hook connecting shaft (41), and the hook connecting shaft (41) is inserted into the bushing (34). The main body (35) is plate-shaped, and the bending shape of the main body (35) is arc-shaped, L-shaped or irregular. When the bending shape is arc-shaped, the arc does not exceed 1 / 2 circumference.

4. The drum according to claim 3, characterized in that, When the drive unit (36) is driven by the drive member (2), the first pivot shaft (32) and the second pivot shaft (33) slide in the first slide groove (63) and the second slide groove (64) respectively, so that the bushing (34) rotates up and down around the fixed end of the sand belt (7) and keeps the distance between the bushing (34) and the fixed end of the sand belt (7) unchanged, so that the tension of the sand belt (7) remains unchanged; Alternatively, when the drive unit (36) is driven by the drive member (2), the first pivot shaft (32) and the second pivot shaft (33) slide in the first slide groove (63) and the second slide groove (64) respectively, so that the bushing (34) rotates up and down around the fixed end of the sand belt (7) as the axis, and the distance between the bushing (34) and the fixed end of the sand belt (7) increases or decreases, thereby increasing or decreasing the tension of the sand belt (7).

5. The drum according to claim 3, characterized in that, The driving component (2) includes a hand-held block (24), a sliding groove edge (21), and an elongated support leg (23). The elongated support leg (23) and the sliding groove edge (21) are both connected to the side of the hand-held block (24) near the drum. There are two sliding groove edges (21), which are located on both sides of the elongated support leg (23). The sliding groove edges (21) are L-shaped to form a groove structure with the hand-held block (24). The driving component is installed in the housing. When the key hole (61) of (6) is in the key hole (61), the hand block (24) is located outside the key hole (61), and the sliding groove edge (21) is located inside the key hole (61); the slender support leg (23) is provided with a sliding groove structure to connect with the drive rod (31), or a drive shaft is installed on the slender support leg (23) to connect with the drive groove, and then the up and down movement of the drive member (2) is transmitted to the drive part (36) of the sliding link (3). The driving component (2) is provided with a locking structure, which is connected to the housing (6). The locking structure includes a spherical protrusion (22), which is provided on both sides of the slide rail edge (21). Correspondingly, a plurality of positioning ball pits (65) adapted to and connected to the spherical protrusion (22) are provided on the inner side of the irregular slide rail plate (62).

6. The drum according to claim 1, characterized in that, The bottom frame (81) is provided with a notch (84) that allows the sliding link (3) to pass through, so as to further reduce the distance between the sand belt (7) and the lower drum surface (83) and make the sand belt (7) closer to the lower drum surface (83). The sand belt adjustment device (1) also includes a fastening cover (5), which is connected to the lower part of the housing (6) and the sliding connecting rod (3). The housing (6) is supported on the bottom frame (81) after passing through the tapping block (51) at the front end of the fastening cover (5) by a long support screw (9), thereby adjusting the distance between the housing (6) and the bottom frame (81) and thus adjusting the tension of the sand belt (7). The fastening cover (5) is also provided with a support foot (52) at the rear end. The support foot (52) and the tapping block (51) are located on both sides of the bottom frame (81), and the support foot (52) is located between the bottom frame (81) and the sand belt connecting component (4). The fixed end of the sand belt (7) is fixedly connected to the bottom frame (81), and the free end of the sand belt (7) is connected to the long flat hook (42) of the sand belt connecting component (4).

7. A method for tuning a musical drum, using the musical drum described in any one of claims 1-6, characterized in that, include: Step 1: Provide a drum (8) with the abrasive belt adjustment device (1), the abrasive belt adjustment device (1) having a first groove (63) and a second groove (64) with defined shapes, and a first pivot (32) and a second pivot (33) with defined distances. The second step is to drive the drive member (2) vertically to adjust the position of the drive member (2) on the housing (6); Third step: Under the drive of the drive member (2), the first pivot shaft (32) and the second pivot shaft (33) of the drive unit (36) slide in the first slide groove (63) and the second slide groove (64) respectively; Fourth step: The drive member (2) has multiple adjustment positions on the housing (6), and when the drive member (2) is adjusted in the corresponding adjustment position, the bushing (34) of the sliding link (3) rotates up and down only around the fixed end of the sand belt (7) as the axis, so that the distance between the bushing (34) and the fixed end of the sand belt (7) remains unchanged, thereby keeping the tension of the sand belt (7) unchanged, and completing the tone adjustment of the drum (8).

8. A method for tuning a musical drum, using the musical drum described in any one of claims 3-5, characterized in that, include: Step 1: Provide a drum (8) with the abrasive belt adjustment device (1), the abrasive belt adjustment device (1) having a first groove (63) and a second groove (64) with defined shapes, and a first pivot (32) and a second pivot (33) with defined distances. The second step is to drive the drive member (2) vertically to adjust the position of the drive member (2) on the housing (6); Third step: Under the drive of the drive member (2), the first pivot shaft (32) and the second pivot shaft (33) of the drive unit (36) slide in the first slide groove (63) and the second slide groove (64) respectively; Fourth step: The drive component (2) has multiple adjustment positions on the housing (6). When the drive component (2) is adjusted in the corresponding adjustment position, the bushing (34) rotates up and down around the fixed end of the sand belt (7) as the axis. At the same time, the distance between the bushing (34) and the fixed end of the sand belt (7) increases or decreases, thereby increasing or decreasing the tension of the sand belt (7) and completing the tone adjustment of the drum (8).

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