摘要:
A piezoelectric actuator is constructed to have a displacement value caused by bending to be added to a usual d31 component displacement, thereby increasing the total amount of displacement of the actuator. The actuator includes an actuator body having a layered structure of piezoelectric layers and internal electrodes, and external electrodes disposed on an external surface of the actuator body at both ends thereof. One of the outermost piezoelectric layers is made piezoelectrically active as a result of making an extension portion of the first external electrode, through the one of the outermost piezoelectric layers, face the inner electrodes, to have a polarity which is different from that of the extension portion, while a second of outermost piezoelectric layers is made piezoelectrically inactive as a result of either making an extension portion of the second external electrode facing, through the second of the outermost piezoelectric layers, the inner electrodes, to have a polarity which is identical to that of the extension portion of the second external electrode or as a result of not forming an extension portion on the outer electrode.
摘要:
A monolithic piezoelectric body includes first internal electrodes which extend to a first side surface of the piezoelectric body but do not extend to a second side surface of the piezoelectric body, and second internal electrodes which extend to the second side surface but do not extend to the first side surface. A connecting internal electrode is disposed within the piezoelectric body and extends between the first and second side surfaces. A first external electrode is disposed on the first side surface and is electrically connected to the first internal electrodes. A second external electrode is arranged on the first side surface so as to be separated from the first external electrode and electrically connected to the connecting internal electrode. A third external electrode is disposed on the second side surface so as to electrically connect the second internal electrodes and the connecting internal electrode.
摘要:
Disclosed is a piezoelectric resonator device. This piezoelectric resonator device comprises a piezoelectric substrate having an almost rectangular plane shape. The piezoelectric substrate is provided with a slit extending to the inside from one edge of the piezoelectric substrate, for forming a tuning fork portion, and a pair of slits for separating the tuning fork portion, spaced apart from the slit forming the tuning fork portion by a predetermined distance on both sides of the slit forming the tuning fork portion, and approximately parallel with the slit forming the tuning fork portion. Vibrating electrodes are formed on both major surfaces of the piezoelectric substrate at a piezoelectric vibrating portion, between the slits separating the tuning fork portion from non-vibrating portions of the substrate.
摘要:
Disclosed is a piezoelectric resonator device. This piezoelectric resonator device comprises a piezoelectric substrate having an almost rectangular plane shape. The piezoelectric substrate is provided with a slit extending to the inside from one edge of the piezoelectric substrate, for forming a tuning fork portion, and a pair of slits for separating the tuning fork portion, spaced apart from the slit forming the tuning fork portion by a predetermined distance on both sides of the slit forming the tuning fork portion, and approximately parallel with the slit forming the tuning fork portion. Vibrating electrodes are formed on both major surfaces of the piezoelectric substrate at a piezoelectric vibrating portion between the slits separating the tuning fork portion from non-vibrating portions of the substrate.
摘要:
Disclosed is a piezoelectric resonator device. This piezoelectric resonator device comprises a piezoelectric substrate having an almost rectangular plane shape. The piezoelectric substrate is provided with a slit extending to the inside from one edge of the piezoelectric substrate, for forming a tuning fork portion, a pair of slits for separating the tuning fork portion, spaced apart from the slit forming a tuning fork portion by a predetermined distance on both sides of the slit forming the tuning fork portion, and approximately parallel with the slit forming a tuning fork portion. Vibrating electrodes are formed on both major surfaces of the piezoelectric substrate at a piezoelectric vibrating portion, between the slits separating the tuning fork portion from non-vibrating portions of the substrate.
摘要:
A piezoelectric filter of an energy-trapped type utilizing a second harmonic wave of the thickness-extensional vibration mode, characterized in that an earth electrode is formed around the center of a piezoelectric substrate in the direction of thickness, and an input electrode and an output electrode are formed on one or both major surfaces of the piezoelectric substrate so as to be opposed to the earth electrode.
摘要:
A piezoelectric resonator of an energy-trapped type utilizing a second harmonic wave of the thickness-extensional vibration mode, in which an inner electrode is formed in a position at a height around the center of a piezoelectric substrate in the direction of thickness, outer electrodes are formed on both major surfaces of the piezoelectric substrate so as to be opposed to the inner electrode through a piezoelectric substrate portion, and the dimension of at least one of the outer electrodes in the direction of the length of the inner electrode is made smaller than the dimension of the outer electrode in the direction of the width of the inner electrode.
摘要:
A print control system includes an order detection circuit for detecting an effective digit number of numeral information. A converter ROM is provided for developing a character pattern code signal in response to the numeral information and the order information thereof. A dot matrix printer responds to the character pattern code signal so as to print the numeral information through the use of, for example, alphabetical or kana characters derived from Chinese characters.
摘要:
This disclosure is directed to an improved strip type or rectangular type piezoelectric resonator utilizing length mode vibration, which includes a piezoelectric ceramic substrate, and first and second main electrode faces formed on opposite surfaces of the piezoelectric ceramic substrate, and which is characterized in that there is further provided a groove which is formed in one of said first and second main electrode faces so as to extend over an entire length of the piezoelectric ceramic substrate in a direction parallel to the longitudinal direction thereof. The groove is set to have a depth in the range of 30 to 70% of the thickness of the piezoelectric substrate.
摘要:
An electronic cash register electrically communicates with an electronic weighing scale. An interface circuit is included in the electronic cash register for introducing weight information data from the electronic weighing scale into the electronic cash register. An abnormal condition detection system is included in the electronic cash register for detecting an abnormal condition occurring within the electronic weighing scale. The electronic cash register includes a synthetic speech sound generation system for audibly informing an operator of the abnormal condition detected by the abnormal condition detection system.