A mesh tension adjustment device and drum

Abstract

This invention provides a mesh tension adjustment device and a drum. The adjustment device includes a drum shell, a mesh surface, a pressure ring, and an adjustment mechanism. The top of the drum shell has an opening that is tightly connected to the mesh surface. The pressure ring is located outside the opening of the drum shell, and its pressing surface is connected to the edge of the mesh surface. The adjustment mechanism forms an adjustable circumferential ring, which is connected to the drum shell and / or the pressure ring. The vertical mating distance between the drum shell and the pressure ring changes with the circumference of the circumferential ring. This invention reduces the circumferential size of the circumferential ring formed by the adjustment mechanism, uniformly changing the circumferential shape of the adjustment mechanism, thereby changing the vertical mating distance between the drum shell and the pressure ring. This results in smoother and more even vertical translation of the pressure ring, avoiding uneven force distribution. Furthermore, the adjustment operation is simple and avoids repeated corrections.

Description

Technical Field

[0001] This invention belongs to the field of musical instrument technology, and in particular relates to a mesh tension adjustment device and a drum. Background Technology

[0002] For drum-type instruments, the mesh needs to be stretched taut over the drumhead to facilitate striking. However, the mesh can deform during prolonged striking, requiring it to be stretched again, i.e., adjusting the tightness of the fit between the mesh and the drumhead.

[0003] In existing technologies, a pressure ring is typically used to hold the mesh surface in place. This pressure ring is vertically fixed to the drum shell by several screws. During adjustment, these screws need to be tightened sequentially, causing the pressure ring to continue pressing down, thus adjusting the force exerted by the pressure ring on the mesh surface. However, adjusting the tension requires repeatedly tightening and adjusting each screw. Since screws are single-point force connections, tightening only one screw can easily cause uneven force on the mesh surface, leading to wrinkles or misalignment. Furthermore, the adjustment process is cumbersome and complex.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mesh tension adjustment device and drum, which is mainly used to solve the problems of inconvenient mesh tension adjustment and poor effect in the prior art.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a mesh tension adjustment device, comprising a drum shell, a mesh surface, a pressure ring, and an adjustment mechanism. The top of the drum shell is provided with an opening that is tightly connected to the mesh surface. The pressure ring is located outside the opening of the drum shell, and the pressing surface of the pressure ring is connected to the edge of the mesh surface. The adjustment mechanism forms an adjustable circumferential ring in the circumferential direction. The circumferential ring is connected to the drum shell and / or the pressure ring. The vertical mating distance between the drum shell and the pressure ring changes with the circumference of the circumferential ring.

[0007] In some embodiments, the adjustment mechanism includes a fastening rope and a buckle, the buckle being connected to the fastening rope and used to adjust the circumferential size of the loop enclosed by the fastening rope.

[0008] Furthermore, the fastening rope is provided with a snap-fit ​​structure, and the snap-fit ​​part is provided with a snap-fit ​​structure that is connected to the snap-fit ​​structure.

[0009] In some embodiments, the adjusting mechanism includes a ring and an adjusting part, the ring having a contraction notch and being elastic, and the adjusting part being connected to the ring and used to adjust the opening size of the contraction notch.

[0010] Furthermore, the ring includes a first force-applying surface and a second force-applying surface, which are respectively connected to the drum shell and the pressure ring. At least one of the first force-applying surface and the second force-applying surface has an inclination relative to the horizontal plane.

[0011] In some embodiments, the inner side of the ring hoop is provided with a protrusion, and the upper and lower sides of the protrusion are provided with a first force-applying surface and a second force-applying surface. The drum shell is provided with a plurality of outwardly extending first locking blocks, and the plurality of first locking blocks are arranged at intervals in the circumference of the drum shell. The pressure ring is provided with a plurality of second locking blocks, and the second locking blocks are inserted into the gap between two first locking blocks. The first force-applying surface is connected to the surface of the first locking block, and the second force-applying surface is connected to the surface of the second locking block.

[0012] Furthermore, both the first force-applying surface and the second force-applying surface are inclined surfaces. The first snap-fit ​​block is provided with a first force-receiving inclined surface adapted to the first force-applying surface, and the second snap-fit ​​block is provided with a second force-receiving inclined surface adapted to the second force-applying surface.

[0013] In some embodiments, the inner side of the ring hoop is provided with a concave portion, and the upper and lower sides of the concave portion are provided with a first force-applying surface and a second force-applying surface. The drum shell is provided with an outwardly extending first locking ring, and the pressure ring is provided with a second locking ring. The second force-applying surface is connected to the first locking ring surface, and the first force-applying surface is connected to the second locking ring surface.

[0014] Furthermore, both the first force-applying surface and the second force-applying surface are inclined surfaces, the first snap-fit ​​ring is provided with a second force-receiving inclined surface adapted to the second force-applying surface, and the second snap-fit ​​ring is provided with a first force-receiving inclined surface adapted to the first force-applying surface.

[0015] In some embodiments, the adjusting part is an adjusting screw, which is screwed to both ends of the contraction notch.

[0016] In some embodiments, the adjusting part is an adjusting rope that wraps around the outer ring of the hoop and is used to adjust the opening size of the contraction notch.

[0017] In some embodiments, the pressure ring is provided with a first guide portion, and the drum shell is provided with a second guide portion that cooperates with the first guide portion, wherein the sliding direction of the first guide portion and the second guide portion is vertical.

[0018] In some embodiments, the adjusting screw is provided with a retaining ring, and the end of the retaining ring is provided with a snap-fit ​​portion, the snap-fit ​​portion having the same structure as the inner side of the ring clamp.

[0019] Secondly, the present invention provides a drum including the above-mentioned mesh tension adjustment device.

[0020] Compared with the prior art, the beneficial effects of the present invention include at least the following:

[0021] By reducing the circumferential size of the ring encircled by the adjustment mechanism and uniformly changing the circumferential shape of the adjustment mechanism, the vertical mating distance between the drum shell and the pressure ring can be changed. The overall vertical translation of the pressure ring is smoother and more fluid, avoiding the problem of uneven force distribution. Moreover, the adjustment operation is simple and avoids repeated corrections.

[0022] The inner side of the ring hoop can be a protrusion or a concave part. When it is a protrusion, the ring hoop is located between the first snap-fit ​​block and the second snap-fit ​​block, with the first force-bearing inclined surface of the first snap-fit ​​block on top and the second force-bearing inclined surface of the second snap-fit ​​block on the bottom. The more the ring hoop contracts inward, the more distant the first force-bearing inclined surface and the second force-bearing inclined surface become, so that the pressing surface of the pressure ring is pressed down.

[0023] When it is a concave part, the ring is set on the outer periphery of the first snap-fit ​​block and the second snap-fit ​​block, with the first force-bearing inclined surface of the first snap-fit ​​block at the bottom and the second force-bearing inclined surface of the second snap-fit ​​block at the top. The more the ring shrinks inward, the closer the first force-bearing inclined surface and the second force-bearing inclined surface become, so that the pressing surface of the pressure ring is pressed down.

[0024] In embodiments where the ring hoop has a shrinkage notch, in order to prevent the ring hoop from being unable to apply locking force to the first locking block and / or the second locking block at the shrinkage notch, which could cause the pressure ring to shift due to uneven force, the deformation of the pressure ring is limited by the vertically sliding first guide portion and the second guide portion, thereby improving the connection strength between the pressure ring and the drum shell.

[0025] In addition, a retaining ring is set in the middle of the adjusting screw to compensate for the lack of force applied by the ring clamp at the shrinkage notch, so that the force between the pressure ring and the drum shell is more uniform. Attached Figure Description

[0026] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0027] Figure 1 This is an exploded view of the structure of a mesh tension adjustment device according to one embodiment of the present invention.

[0028] Figure 2 yes Figure 1A half-section diagram of the mesh tension adjustment device.

[0029] Figure 3 This is an exploded view of the structure of a mesh tension adjustment device in another embodiment of the present invention.

[0030] Figure 4 yes Figure 3 A half-section diagram of the mesh tension adjustment device.

[0031] Figure 5 This is a half-section schematic diagram of a mesh tension adjustment device according to one embodiment of the present invention.

[0032] Figure 6 yes Figure 5 A front view of a mesh tension adjustment device.

[0033] Figure 7 This is a half-section schematic diagram of a mesh tension adjustment device according to another embodiment of the present invention.

[0034] Figure 8 yes Figure 7 A front view of a mesh tension adjustment device. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Reference Figures 1 to 4In a first aspect, the present invention provides a mesh tension adjustment device, comprising a drum shell 1, a mesh surface 2, a pressure ring 3, and an adjustment mechanism 4. The top of the drum shell 1 has an opening 110 that is tightly connected to the mesh surface 2. The mesh surface 2 is tensioned and fastened above the opening 110. The pressure ring 3 is located outside the opening 110 of the drum shell 1, and is fastened from top to bottom at the opening 110. The pressing surface of the pressure ring 3 is connected to the edge of the mesh surface 2. The adjustment mechanism 4 forms an adjustable-size annular ring 40 in the circumferential direction. The annular ring 40 may occupy the entire adjustment mechanism 4 or may be a part of the adjustment mechanism 4. The annular ring 40, as the part that applies outward force, may be connected only to the drum shell 1, only to the pressure ring 3, or simultaneously to both. Connected to the drum shell 1 and the pressure ring 3, when the circumference of the retaining ring 40 changes, the force between the retaining ring 40 and the drum shell 1 and the pressure ring 3 also changes. The force between the retaining ring 40 and the drum shell 1 and the pressure ring 3 can be direct or indirect. In short, under the action of the retaining ring 40, the vertical mating distance between the drum shell 1 and the pressure ring 3 also changes, converting the circumferential contraction force into a vertical downward pressing force. That is, when the drum shell 1 is fixed, the pressure ring 3 presses down. Since the pressing surface is a complete circular plane, it applies a downward pressing force evenly to the edge of the mesh surface 2, so that the mesh surface 2 on the opening 110 of the drum shell 1 is evenly tensioned. Moreover, the adjustment is convenient, and only the adjustment mechanism 4 needs to be tightened.

[0038] It should be noted that, in one implementation, the annular ring 40 formed by the adjusting mechanism 4 is connected to both the drum shell 1 and the pressure ring 3. When the annular ring 40 contracts inward, while the drum shell 1 remains stationary, a force is applied to the pressure ring 3. This force is directed inward and downward, and can be divided into a vertical component force, causing the pressure ring 3 to press down. Similarly, in another implementation, the annular ring 40 formed by the adjusting mechanism 4 only directly contacts the pressure ring 3. When the annular ring 40 is tightened, a portion of the structure of the pressure ring 3 narrows accordingly. The part where the drum shell 1 and the pressure ring 3 are connected is constricted, forming an inverted triangle shape, which makes the fit between the pressure ring 3 and the drum shell 1 deeper, thus achieving the effect of the pressure ring 3 pressing down. Alternatively, as another implementation, the annular ring 40 formed by the adjusting mechanism 4 is in direct contact with the drum shell 1. When the annular ring 40 is tightened, a part of the structure of the drum shell 1 narrows, while the part where the pressure ring 3 and the drum shell 1 are connected is divergent, forming an equilateral triangle shape, which makes the fit between the pressure ring 3 and the drum shell 1 deeper, thus achieving the effect of the pressure ring 3 pressing down.

[0039] Example 1:

[0040] In this embodiment 1, the adjustment mechanism includes a fastening rope and a buckle. The buckle is connected to the fastening rope and is used to adjust the circumferential size of the ring enclosed by the fastening rope. The fastening rope can be a closed rope or an open rope. The fastening rope can be a steel wire rope or a rubber rope. The buckle is also adjusted and fixed on the fastening rope. The fastening rope and the buckle together form a ring. The ring is contracted by pulling the fastening rope tight.

[0041] To improve the connection strength between the fastening rope and the buckle, the fastening rope is equipped with a snap-fit ​​structure, and the buckle is equipped with a buckle structure that connects to the snap-fit ​​structure. Through the locking function of the snap-fit ​​structure and the buckle structure, the problem of connection failure between the fastening rope and the buckle is avoided when the net surface 2 is hit. Under human intervention, the snap-fit ​​structure can be unlocked by manually opening the buckle structure.

[0042] In addition, to avoid discontinuities in the force application of the fastening rope in the area where the buckle connects to the fastening rope, a transition block is provided on the inward side of the buckle. The transition block is made of rubber and can deform under pressure. The inner side of this transition block is crescent-shaped. However, since the structural dimensions of this transition block do not change once they are fixed, the size of this crescent-shaped transition block is designed to match the size of the initial ring. As the ring becomes smaller, the transition block deforms accordingly using the properties of rubber, which can compensate for the force gap caused at the buckle position.

[0043] Example 2:

[0044] In this embodiment 2, the adjustment mechanism 4 includes a ring hoop 410 and an adjustment part 420. The ring hoop 410 is provided with a contraction notch 430 and is elastic. The adjustment part 420 is connected to the ring hoop 410 and is used to adjust the opening size of the contraction notch 430. By operating the adjustment part 420, the contraction notch 430 can be tightened or loosened.

[0045] More specifically, the ring hoop 410 includes a first force-applying surface and a second force-applying surface. The first force-applying surface and the second force-applying surface are connected to the drum shell 1 and the pressure ring 3, respectively. At least one of the first force-applying surface and the second force-applying surface has an inclination relative to the horizontal plane, that is, at least the following situations exist: the first force-applying surface is a plane and the second force-applying surface is an inclination; the first force-applying surface is an inclination and the second force-applying surface is a plane; the first force-applying surface is an inclination and the second force-applying surface is an inclination. As long as one of the force-applying surfaces is an inclination, when the ring hoop 410 contracts inward, it can provide a downward component force to the pressure ring 3.

[0046] Combination Figure 1 and Figure 2In one embodiment, the ring 410 has a protrusion 411 on its inward side. The protrusion 411 has a wedge-shaped structure. The upper and lower sides of the protrusion 411 have a first force-applying surface 440A and a second force-applying surface 450A. The drum shell 1 has a plurality of outwardly extending first locking blocks 120A, which are spaced apart around the circumference of the drum shell 1. The pressure ring 3 has a plurality of second locking blocks 310A, which extend vertically along the pressure ring 3 and include a radially outwardly extending skirt at their ends. The second locking blocks 310A are inserted into the gap between two first locking blocks 120A. During installation, the second locking blocks 310A are moved from top to bottom along the first locking blocks 120A. Insert the second locking block 310A into the gap between the two first locking blocks 120A. The width of the second locking block 310A is equal to the width of the gap between the two first locking blocks 120A. The two first locking blocks 120A are used to lock the second locking block 310A to prevent the pressure ring 3 from rotating. After the pressure ring 3 is installed, the first locking block 120A and the second locking block 310A form a mating angle on their skirts in the radial direction. This mating angle is open outward. At this time, the skirt of the first locking block 120A is on top and the skirt of the second locking block 310A is on the bottom. Then, the ring 410 is locked at this mating angle, and the first force-applying surface 440A of the ring 410 is connected to the surface of the first locking block 120A, and the second force-applying surface 450A is connected to the surface of the second locking block 310A.

[0047] Preferably, both the first force-applying surface 440A and the second force-applying surface 450A are inclined surfaces. The first locking block 120A has a first force-receiving inclined surface 130A adapted to the first force-applying surface 440A, and the second locking block 310A has a second force-receiving inclined surface 320A adapted to the second force-applying surface 450A. In terms of position, the first force-receiving inclined surface 130A of the first locking block 120A is on top, and the second force-receiving inclined surface 320A of the second locking block 310A is on the bottom. However, in terms of direction, the first force-receiving inclined surface 130A faces downward and outward, sloping downward and outward, while the second force-receiving surface faces upward and outward. Facing outwards, the protrusion 411 on the inner side of the ring 410 is triangular. The first force-applying surface 440A faces inwards and upwards, and the second force-applying surface 450A faces inwards and downwards, which perfectly matches the first force-bearing inclined surface 130A and the second force-bearing inclined surface 320A. The more the ring 410 contracts inwards, the greater the thickness of the protrusion 411 at the same point. Under the guidance of the inclined surface, the ring 410 opens the first locking block 120A and the second locking block 310A, making the first force-bearing inclined surface 130A and the second force-bearing inclined surface 320A more distant, so that the pressing surface of the pressure ring 3 is pressed down.

[0048] Combination Figure 3 and Figure 4In another embodiment, the ring hoop 410 has an inwardly facing concave portion 412, which has a V-shaped groove structure. The upper and lower sides of the concave portion 412 have a first force-applying surface 440B and a second force-applying surface 450B. The drum shell 1 has an outwardly extending first snap-fit ​​ring 120B, which is a complete flange ring. The pressure ring 3 has a second snap-fit ​​ring 310B, which is also a complete flange ring. Both the first snap-fit ​​ring 120B and the second snap-fit ​​ring 310B have a tendency to tilt and shrink at their edges. Under normal circumstances, there is a gap between the first snap-fit ​​ring 120B and the second snap-fit ​​ring 310B, and their edges shrink towards this gap. The first snap-fit ​​ring 120B and the second snap-fit ​​ring 310B form a mating sharp angle at their edges. The ring hoop 410 covers the outwardly facing side of the two flange rings. The lower second force-applying surface 450B is connected to the surface of the first snap-fit ​​ring 120B.

[0049] Preferably, both the first force-applying surface 440B and the second force-applying surface 450B are inclined surfaces. The first snap-fit ​​ring 120B is provided with a second force-receiving inclined surface 130B that is adapted to the second force-applying surface 450B. The second force-receiving inclined surface 130B is inclined outward and downward. The second snap-fit ​​ring 310B is provided with a first force-receiving inclined surface 320B that is adapted to the first force-applying surface 440B. The first force-receiving inclined surface 320B is inclined outward and upward. The inclination of the second force-receiving inclined surface 130B is the same as that of the second force-applying surface 450B. The inclination of the first force-receiving inclined surface 320B is the same as that of the first force-applying surface 440B. As the ring 410 shrinks inward, the V-shaped groove-shaped concave portion 412 will bring the first force-receiving inclined surface 320B closer to the second force-receiving inclined surface 130B, making the gap between the first force-receiving inclined surface 320B and the second force-receiving inclined surface 130B smaller and smaller, so that the pressing surface of the pressure ring 3 is pressed down.

[0050] As a preferred embodiment, the adjusting part 420 is an adjusting screw 421, which is screwed to both ends of the contraction notch 430. By tightening or loosening the adjusting screw 421 and the locking nut, the size of the opening of the contraction notch 430 of the ring 410 can be adjusted.

[0051] Combination Figures 5 to 8As another preferred option, the adjustment part is an adjustment rope 422. The adjustment rope is wrapped around the outer ring of the hoop 410 and is used to adjust the opening size of the contraction notch 430. By tightening or loosening the adjustment rope, the contraction notch 430 is narrowed or widened, thereby adjusting the circumferential size of the ring 40 enclosed by the hoop 410. Of course, a groove is provided on the outer ring of the hoop 410, and the adjustment rope 422 is inserted into this groove. There are multiple ways to keep the adjustment rope 422 knotted and fixed, such as manually knotting without the need for other structures; or using a cable tie, so that the adjustment rope 422 will not rebound after being tightened, can remain tight, and can maximize the uniform force on the hoop 410, avoiding uneven force that causes deformation of the mesh surface 2.

[0052] Example 3:

[0053] In this embodiment 3, considering that when the ring 410 has a contraction notch 430, the first locking block (ring) and / or the second locking block (ring) corresponding to this contraction notch 430 lacks force, while the first locking block (ring) and / or the second locking block (ring) at other positions are subjected to the force applied by the ring 410, as the ring 410 becomes increasingly tighter, it is easy for torsional deformation to occur in the area corresponding to the contraction notch 430. Therefore, in order to prevent the pressure ring 3 from undergoing torsional deformation, the pressure ring 3 is provided with a first guide portion, and the drum shell 1 is provided with a second guide portion that cooperates with the first guide portion. The first guide portion and the second guide portion The sliding direction is vertical. In one embodiment, the first guide part is a retaining strip and the second guide part is a retaining groove. When the pressure ring 3 is placed from top to bottom around the opening 110 of the drum shell 1, the first guide part is engaged with the second guide part and slides in along the vertical direction. When the ring hoop 410 contracts inward, the relative displacement direction between the first guide part and the second guide part is vertical. The lower the position, the thicker the first guide part or the shallower the groove of the second guide part, the more downward the pressing surface, and the tighter the engagement between the first guide part and the second guide part. This restricts the deformation of the pressure ring 3 and improves the connection strength between the pressure ring 3 and the drum shell 1.

[0054] Example 4:

[0055] In this embodiment 4, the adjusting screw 421 is provided with a retaining ring. One end of the retaining ring is fixed to the screw, and the other end is provided with a retaining part. The retaining part has the same structure as the inner side of the ring 410. That is, in order to make up for the lack of force of the ring 410 at the shrinkage gap 430, an additional retaining ring is added to complete the force integrity of the shrinkage gap 430 area, so that the force between the pressure ring 3 and the drum shell 1 is more uniform.

[0056] Preferably, the adjusting screw 421 has several retaining strips at the screw end, and one end of the retaining ring can move on the retaining strips, that is, the fixed position of the retaining ring on the screw can be adjusted to adapt to the position adjustment of the retaining ring when the size of the ring 40 is different, and to avoid interference between the ring 410 and the retaining ring when the ring 410 shrinks. When adjustment is required, since the head of the adjusting screw 421 does not move, the shrinkage notch 430 is shrunk by tightening the nut at the tail end, and one end of the ring 410 is closer to the retaining ring. In order to ensure that the retaining part of the retaining ring can still maintain the force between the first retaining block (ring) and / or the second retaining block (ring) under different sizes of ring 40, the retaining ring is made of rubber material, which can produce a certain adaptive deformation under pressure and can ensure a certain force supply.

[0057] Secondly, the present invention provides a drum including the above-mentioned mesh tension adjustment device.

[0058] Compared with the prior art, the present invention provides a mesh tension adjustment device and drum, which reduces the circumferential size of the ring 40 enclosed by the adjustment mechanism 4. By uniformly changing the circumferential shape of the adjustment mechanism 4, the vertical mating distance between the drum shell 1 and the pressure ring 3 can be changed, and the overall vertical translation of the pressure ring 3 is smoother and more responsive, avoiding the problem of uneven force. Moreover, the adjustment operation is simple and avoids repeated corrections.

[0059] The inner side of the ring 410 can be a protrusion 411 or a concave part 412. When it is a protrusion 411, the ring 410 is located between the first snap block and the second snap block, with the first force-bearing inclined surface of the first snap block on top and the second force-bearing inclined surface of the second snap block on the bottom. The more the ring 410 contracts inward, the more distant the first force-bearing inclined surface and the second force-bearing inclined surface become, so that the pressing surface of the pressure ring 3 is pressed down.

[0060] When it is a concave portion 412, the ring hoop 410 is located on the outer periphery of the first snap-fit ​​block and the second snap-fit ​​block, with the first force-bearing inclined surface of the first snap-fit ​​block at the bottom and the second force-bearing inclined surface of the second snap-fit ​​block at the top. The more the ring hoop 410 contracts inward, the closer the first force-bearing inclined surface and the second force-bearing inclined surface become, so that the pressing surface of the pressure ring 3 is pressed down.

[0061] In the embodiment where the ring hoop 410 has a shrinkage notch 430, in order to avoid the ring hoop 410 being unable to apply locking force to the first locking block and / or the second locking block at the shrinkage notch 430, which could cause the pressure ring 3 to shift due to uneven force, the deformation of the pressure ring 3 is limited by the vertically sliding first guide portion and the second guide portion, thereby improving the connection strength between the pressure ring 3 and the drum shell 1.

[0062] In addition, a retaining ring is provided in the middle of the adjusting screw 421 to compensate for the lack of force applied by the ring 410 at the shrinkage notch 430, so that the force between the pressure ring 3 and the drum shell 1 is more uniform.

[0063] Finally, it should be emphasized that the present invention is not limited to the above-described embodiments. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0064] The above description outlines the main process steps of the invention. Other functional steps may be interspersed within this process, and the logical order and process steps may be disrupted. If the data processing method follows this process step format or the core idea of ​​the data processing is similar or identical, it should be protected.

Claims

1. A mesh tension adjustment device, characterized in that, The device includes a drum shell, a mesh surface, a pressure ring, and an adjustment mechanism. The top of the drum shell has an opening that is tightly connected to the mesh surface. The pressure ring is located outside the opening of the drum shell, and the pressing surface of the pressure ring is connected to the edge of the mesh surface. The adjustment mechanism forms an adjustable circumferential ring, which is connected to the drum shell and / or the pressure ring. The vertical mating distance between the drum shell and the pressure ring changes with the circumference of the circumferential ring. The adjustment mechanism includes a ring and an adjustment part. The ring has a contraction notch and is elastic. The adjustment part is connected to the ring and is used to adjust the opening size of the contraction notch. The ring includes a first force-applying surface and a second force-applying surface, which are respectively connected to the drum shell and the pressure ring; The ring hoop has a protrusion on its inward side, and a first force-applying surface and a second force-applying surface are provided on its upper and lower sides. The drum shell has a plurality of outwardly extending first locking blocks, which are spaced apart around the circumference of the drum shell. The pressure ring has a plurality of second locking blocks, which are inserted into the gap between two first locking blocks. The first force-applying surface is connected to the surface of the first locking block, and the second force-applying surface is connected to the surface of the second locking block. The width of the second locking block is equal to the width of the gap between two first locking blocks. The first locking blocks and the second locking blocks form a mating angle at their skirts in the radial direction. This mating angle is open outward, with the skirt of the first locking block on top and the skirt of the second locking block on the bottom. The ring hoop is engaged at this mating angle. Both the first force-applying surface and the second force-applying surface are inclined surfaces. The first snap-fit ​​block is provided with a first force-receiving inclined surface adapted to the first force-applying surface, and the second snap-fit ​​block is provided with a second force-receiving inclined surface adapted to the second force-applying surface.

2. The mesh tension adjustment device according to claim 1, characterized in that, The adjusting part is an adjusting screw, which is screwed to both ends of the contraction notch.

3. The mesh tension adjustment device according to claim 1, characterized in that, The adjusting part is an adjusting rope, which is wrapped around the outer ring of the hoop and used to adjust the opening size of the contraction notch.

4. The mesh tension adjustment device according to claim 2, characterized in that, The pressure ring is provided with a first guide portion, and the drum shell is provided with a second guide portion that cooperates with the first guide portion. The sliding direction of the first guide portion and the second guide portion is vertical.

5. The mesh tension adjustment device according to claim 2, characterized in that, The adjusting screw is provided with a retaining ring, and the end of the retaining ring is provided with a snap-fit ​​part, which has the same structure as the inner side of the ring clamp.

6. A drum, characterized in that, Includes the mesh tension adjustment device as described in any one of claims 1 to 5.

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