受験番号：28IPM020[0003][Solution to Problem]
However, even when an object has a smooth surface, the object cannot be free from airresistance, which affects the fuel efficiency, acceleration, maximum speed, stability, andother performance of the above examples of transportation objects. In particular, the fuelefficiency, which is a matter directly related to environmental problems including energy
resources, pollution, acid rain, and global warming, is becoming more important as theenergy for transportation has been increasing. In addition, an object flying at a very highspeed involves a concern about frictional heat generated with air (aerodynamic heating).
For example, a space shuttle travels as fast as at a speed of 7.6 km per second during
atmospheric re-entry, and thus part of its surface may have a temperature equal to or
greater than 1400°C caused by frictional heat. Therefore, heat-resisting materials andheat-insulated structures have been regarded as difficult to develop and remain greatchallenges, and future new ideas for solving problems including durability are desired
and urgently needed.
[0004]
An objective of the present invention is to solve the above-described problems byproviding a structure with reduced fluid resistance having a breakthrough object surface
providing dramatically improved innovation technologies compared with conventional
levels. Based on a new hydrodynamic theory, such structure of the present invention
establishes that, for example, an object surface has a lower fluid resistance than smoothsurfaces; the fuel efficiency, acceleration, maximum speed, stability, and otherperformance of, for example, every transportation object can be improved; in particular,
efforts to address energy saving and environmental problems can be made on a global
basis; and durability, cost, and other factors for heat-resisting materials and heat-insulated
structures can be improved by reducing frictional head and various types of parasite dragon an object flying at a very high speed.
問２
Next, as illustrated in Fig. 2, each of the bell-shaped cores 1 was put in place ina die cavity for the final hollow molded product.
The die includes a die A, a die B, and a die C, which are indicated by reference
numbers 20, 30, and 40, respectively in FIG. 2, and which include projections 22 and 23,projections 32 and 33, and projections 41, respectively.

Specifically, the projection 22 of the die A and the projection 32 of the die B are
placed so as to abut on an upper projection 11 of the core 1, and the projection 23 of thedie A and the projection 33 of the die B are placed so as to abut on a through-hole 12 of
the core 1 and to be spaced apart from an inner wall of the core 1. In addition, theprojection 41 of the die C is inserted into a recess 13 of the core 1, whereby the core 1 isplaced in a predetermined position in the die cavity.
Each outer resin (B) 5 was poured, at the injection molding temperature (320°C),
from an inlet 21 to fill around the each of the cores 1 placed in the die, injection molded,and cooled, thereby providing a core-integrated molded product.
(omitted)
Good: No crack or chap was visually observed on the outer resin (the coreincluded in the obtained core-integrated molded product was not deformed).
Fair: Cracks and chaps were observed on the outer resin (the core was slightly
deformed during injection molding of the resin (B)).
Bad: Cracks and chaps were significantly observed on the outer resin (the core
was significantly deformed during injection molding of the resin (B)).
コメント○、△、×を Good、Fair、Bad としました。
問３[Claim 1]
A simplified zoom lens mechanism comprising:a lens barrel comprising fixed lens groups disposed at both ends of the lens barrel
and two moving lens groups disposed along an optical axis L between the fixed lensgroups, one of the moving lens groups being for zooming and capable of varying amagnification of an imaged subject, and the other one of the moving lens group being for
focusing intended to adjust a focus, wherein the two moving lens groups in the lens barrel
are movable along an optical axis L in a zoom lens mechanism; andan active axis 5 and an passive axis 6 each being parallel to the optical axis L
and disposed around the optical axis L;
an active body 8 slidably fit into the active axis 5, the active body 8 being integral
with a frame of the focusing moving lens group 4; anda passive body 9 slidably fit into the passive axis 6, the passive body 9 being
integral with a frame of the zooming moving lens group 4,

wherein the passive body 9 on the passive axis 6 is capable of coupled-driving
driven by the active body 8 on the active axis 5, whereby the zooming moving lens group
3 and the focusing moving lens group 4 are movable along the optical axis L.