| 摘要 |
<p>Exercising devices for jaw muscles comprise resilient biassing means. In a device for enhancing opening power of the jaw (Figure 4), a band 66 engages the user's head and a pad 80 engages under the user's chin. The band and pad are linked by a tension spring 84. In a device for improving bite (Figure 1) the device can be clenched between the teeth. The biassing means can be adjustable - nut 36, (90).</p> |
