Abstract: A first load transmission surface 54 and a second load transmission surface 56 are each formed as a flat surface extending parallel to a load input direction. Therefore, elastic deformation occurring in each of an outer body part 66 and an inner body part 68 in a stopper elastic body 64 includes a main component of a shear deformation component, and a secondary component of a compressive and tensile deformation component that is small relative to the shear deformation component. Consequently, a sharp increase in deformation resistance and dynamic spring constant when a high load is input can be effectively suppressed.

Abstract: A first load transmission surface 54 and a second load transmission surface 56 are each formed as a flat surface extending parallel to a load input direction. Therefore, elastic deformation occurring in each of an outer body part 66 and an inner body part 68 in a stopper elastic body 64 includes a main component of a shear deformation component, and a secondary component of a compressive and tensile deformation component that is small relative to the shear deformation component. Consequently, a sharp increase in deformation resistance and dynamic spring constant when a high load is input can be effectively suppressed.

Abstract: A surface acoustic wave device is provided which includes a phase-modulated interdigital electrode and a uniform interdigital electrode having an equal electrode finger width and spacing, and the device is arranged to avoid occurrence of deviation of the actual performance thereof from the designed one. To this end, the electrode finger width and spacing of the uniform interdigital electrode are determined such that the ratio of metal surface to unmetallized substrate area in the phase-modulated interdigital electrode becomes equal to the ratio of metal surface to unmetallized substrate area in the uniform inter-digital electrode.

Abstract: An elastic surface wave device including interdigital finger electrodes comprising interdigital fingers each of which consists of a pair of divided finger elements having an equal width. The spacing between adjacent ones of the interdigital fingers is equal to the spacing between the pair of divided finger elements thereof. Importantly, at least one of the interdigital fingers is differentiated from the remainder of the interdigital fingers in respect of the distance from the center of the spacing between one of the interdigital fingers and that one of the interdigital fingers which is adjacent thereto on one side to the center of the spacing between the aforementioned one interdigital finger and that one of the interdigital fingers which is adjacent thereto on the other side. Furthermore, the interdigital finger electrode is designed such that the width of the respective finger elements is equal to the spacing therebetween.