| 摘要 |
<p>The device has support parts (1,2) extending in a vertical direction, and a base portion (12) resting on a floor. Rod shaped or curved spring units (31) are arranged in a quiver, where force applied by a user by a flexible string unit strikes at the free upper end section of the spring unit. The spring unit elastically deforms in a space defined by the support parts in the given vertical plane, and not sideways from the space.</p> |
