Patent Application
20210199235
The present invention relates to a musical instrument stand, and more particularly to a tightening structure of a musical instrument stand.
Some instruments, such as drums, cymbals, etc., are disposed at predetermined positions for percussion to produce musical sounds. However, different musicians have their own comfortable percussion habits, so it is necessary to adjust the setting angle of the instrument.
U.S. Pat. No. 7,395,994 discloses a percussion instrument arm adapted. An angle adjusting device is provided between a support rod and a musical instrument to be held. The angle adjusting device includes an immovable toothed disc and a movable toothed disc. When the two are separated from each other, the movable toothed disc can be pivoted relative to the immovable toothed disc, thereby changing the setting angle of the instrument. When the teeth of the movable toothed disc are engaged with the teeth of the immovable toothed disc, the movable toothed disc is locked, thereby holding the instrument. However, in the conventional structure, the angle of the musical instrument is adjusted based on the slot width of the teeth of the movable and immovable toothed disc, and only an integer multiple of the slot width serves as the adjustment extent. It is impossible to make a fine adjustment as desired, so that the user cannot adjust the instrument to the most suitable position.
On the other hand, the angle adjusting device is further provided with a tightening bolt. After the instrument is adjusted to the desired angle, the tightening bolt is tightened for the movable toothed disc to be engaged with the immovable toothed disc. The process of operating the tightening bolt takes a lot of time, and it also takes a lot of strength when it is tightened tightly, resulting in inconvenience in use.
Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems.
The primary object of the present invention is to provide a tightening structure of a musical instrument stand. The setting angle of the musical instrument can be steplessly adjusted as desired, and the tightening and fixing operation of the musical instrument stand is easy and labor-saving, which is convenient to use.
In order to achieve the above object, a tightening structure of a musical instrument stand is provided. The tightening structure comprises a movable member, an immovable member, and a first fastening bolt. The movable member has a first connecting portion for connecting a first arm of the musical instrument stand. The movable member is provided with a cylindrical shaft extending outward in an axial direction. The immovable member has a second connecting portion for connecting a second arm of the musical instrument stand. One side of the immovable member is recessed to form a recess. A bottom of the recess forms a semi-circular arc with a radius of curvature corresponding to that of the shaft. The shaft is inserted into the recess and abuts against the bottom of the recess. The immovable member is provided with a first screw hole communicating with a top of the recess. The first screw hole is perpendicular to the axial direction. The first fastening bolt is screwed in the first screw hole. One end of the first fastening bolt is inserted into the recess and has a flared end portion. Another end of the first fastening bolt is connected with a handle. When the handle is rotated, the flared end portion is driven to abut against the shaft, thereby fixing the movable member.
In an embodiment, the first connecting portion includes a through hole configured to receive the first arm and an elongate slot that extends in a direction same as that of the through hole and communicates with the through hole laterally. The movable member is provided with a second screw hole communicating with the elongate slot. A second fastening bolt is screwed to the second screw hole. The elongate slot is provided with an elongate pad. The elongate pad has a first side that is tightly pressed by the second fastening bolt and a second side that is in close contact with the first arm so as to fix the first arm.
Preferably, the movable member is provided with a pin hole communicating with the elongate slot. The elongate pad is provided with a perforation corresponding in position to the pin hole. A pin is inserted in the pin hole and the perforation.
Preferably, the second side is formed with a concave arc portion corresponding in shape to the first arm.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
Referring to
One side of the movable member 2 is provided with a cylindrical shaft 21 extending outward in an axial direction. One side of the immovable member 1 is recessed to form a recess 11. The bottom 111 of the recess 11 forms a semi-circular arc with a radius of curvature corresponding to that of the shaft 21. The shaft 21 is inserted into the recess 11 and abuts against the bottom 111 of the recess 11, as shown in
As shown in
When the setting angle of the musical instrument stand is to be adjusted, the user only needs to turn the handle 32, so that the first fastening bolt 3 drives the flared end portion 31 to move away from the shaft 21. The movable member 2 can be turned freely, and the setting angle of the musical instrument stand can be changed. Furthermore, when the flared end portion 31 is moved away from the shaft 21, the movable member 2 can be rotated as desired as shown in
Furthermore, as long as the flared end portion 31 of the first fastening bolt 3 contacts or leaves the shaft 21, it can quickly tighten or loosen the shaft 21. Therefore, the user does not need to turn the handle 32 greatly, and only needs to rotate a little angle to lock or unlock the movable member 2. It does not require much strength, so it is easy to operate.
The elongate slot 23 is provided with an elongate pad 26. The elongate pad 26 has a first side 261 facing the second fastening bolt 25 and a second side 262 facing the first arm 4. In this embodiment, the second side 262 is formed with a concave arc portion 263 corresponding in shape to the first arm 4. When the second fastening bolt 25 is tightened, the second tightening bolt 25 abuts against the first side 261 of the elongate pad 26, so that the elongate pad 26 has the concave arc portion 263 on the second side 262 to be in close contact with the first arm 4. Thus, the elongate pad 26 is pressed against the first arm 4 to position the first arm 4.
As shown in
Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.
