(a) Technical Field of the Invention
The present invention relates to an improved structure of a base drum counter-hoop mounted clamp, which comprises a clamp body having upper and lower locking platforms coupled to a counter hoop of the base drum and a vertical plate arranged therebetween forming centrally an opening and a projecting pivot seat to accommodate insertion and coupling of a movable connection member, the connection member having an end to which a V-shaped clip block is pivoted to oppose to a clip plate mounted to an underside of the upper platform for respectively clamping against opposite surfaces of the counter hoop and an opposite end to which a threaded bolt bar is rotatably coupled so that with the threaded bolt bar tightened and driven downward, the clip block pivoted to the end of the connection member is pushed upward to securely clamp and position on the counter hoop for allowing a holder formed on the upper platform to mount a support bar that carries a music instrument, whereby simple and convenient racking of the music instrument to the base drum is realized to provide a safe and practical purposes of simple assembling.
(b) Description of the Prior Art
For the need of performance, music instruments are often arranged and racked together in a set. The racking of the music instruments requires racks/stands, as shown in FIG. 6 of the attached drawings, wherein a base drum 30 is provided as a core of the racking of the music instruments. Pre-shaped rack 31 is arranged around the base drum 30 for mounting various instruments 32 for a performer to move within a limited space to play these instruments. Such a racking of the music instruments is very inconvenient in connecting and assembling of the parts thereof, and due to that all the stands or racks are independently arranged, the legs 33 are expanded and occupy quite a floor area to firmly and safely support the music instruments. This is certainly a waste of the floor space and also leads to an undesired expansion of the limited space that the performer is moving therein for playing the instruments, resulting in the inconvenience of performing percussion of the drums. In addition, the expanded legs 33 make the practical operation/movement in the stage in convenient; especially for a small stage, it would become very crowded. To make the arrangement of music instruments with a simplified configuration to make the racking space more concentrated for convenience of use, racking devices are available in the market, such as a drum-mounted clamp disclosed in U.S. Pat. No. 5,684,258, wherein a pivotally connected bar and a clamp body are arranged in a vertical direction and pivoted and a locking bar is provided for assembling purposes to mounting the clamp body to the counter hoop of the base drum. With the locking effect realized by the locking bar and a spring encompassing around the locking bar, the clamp body can be secured. However, since force applied in percussion of the instrument is variable, the resilient clamping will result in instability of the clamp body. Due to the instability of mounting of the clamp body, the music instrument supported thereby can not effect stable production of sound and satisfy the needs of racking. Thus, such a solution is not appealing to the users. In addition, the known solution uses a ringed bar to support and secure also surfaces instability of receiving and holding the instrument. This is because the straight knurled surface of an insertion ring thereof is not able to effectively hold and fix a straight bar like support rack, leading to unsafe racking. This also makes it not appealing to the users. It is thus desired to alleviate the above mentioned impracticability of the known racking structure and provide a more practical music instrument racking that features simplified assembling.