JPH0442614U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 2.
4 is a sectional view taken along the line C-C in FIG. 2, FIGS. Explanatory diagram of the operation of the piezoelectric actuator for position adjustment in No. 1, No. 7
Figures a and b are explanatory diagrams of the operation of the second fixing piezoelectric actuator in Figure 2, and Figure 8 is an explanatory diagram showing an example of an optical imaging device in which the focal position adjustment device of the present invention is used. DESCRIPTION OF SYMBOLS 1... Image pickup element, 2... Inner case, 3... Intermediate case, 4... Outer case, 5... First piezoelectric actuator for fixing, 6... First piezoelectric actuator for position adjustment, 7... Second piezoelectric actuator for fixing, 8a, 8b...Second piezoelectric actuator for position adjustment.

Claims (1)

[Scope of utility model registration request] an image sensor, an inner case having a surface opposite to the light-receiving surface of the image sensor fixed inside, a portion corresponding to the light-receiving surface of the image sensor being open, and an end surface substantially parallel to the light-receiving surface; and the end surface. an intermediate case having an L-shaped outer shape, a planar part that is in contact with the plane, substantially parallel to the light-receiving surface, and having an opening in a portion corresponding to the light-receiving surface; and a peripheral wall that is perpendicular to the plane part and provided on the outer periphery of the plane part; has one end fixed to the plane part of the intermediate case, and the other end presses and fixes the inner case against the intermediate case, so that when an external driving voltage is applied, the inner case is substantially orthogonal to the plane of the intermediate case. a plurality of first fixing piezoelectric actuators extending in the direction of At least two pairs of piezoelectric actuators for first position adjustment are arranged in parallel with each other, and a pair of first position adjustment piezoelectric actuators that have a gap between them and the outer circumference of the case in steady state and extend from the one end to the other end when an external driving voltage is applied. 1 in the direction almost perpendicular to the 2 pairs
A first position adjustment piezoelectric actuator group arranged in pairs, the longitudinal direction of which extends in the longitudinal direction by a drive voltage applied from the outside in a direction substantially perpendicular to the light receiving surface, and one end fixed to the external case. a pair of second piezoelectric actuators for position adjustment whose other ends face each other across the intermediate case and are disposed with a gap between the other end and the intermediate case when the external drive voltage is 0; A second piezoelectric actuator group for position adjustment, which is arranged in at least three pairs, and a distal end thereof is inserted from the inside of the circumferential wall through through holes respectively provided on mutually opposing surfaces of the circumferential wall, and the inserted distal end is inserted outside the circumferential wall. The intermediate case is fixed to a case, and has a head whose external shape is larger than the diameter of a through hole provided in the peripheral wall, and the intermediate case is formed between the head and the outer case in a normal state. A focal position adjusting device comprising a pair of second position fixing piezoelectric actuators that are fixed and create a gap between the head and the outer peripheral portion when a driving voltage is applied from the outside. .