Hand held tactile toy

A shaped object that fits into the palm of the hand to give a pleasurable tactile sensation is disclosed. The tactile sensation is created by a unique combination of resistant and pliable sections in the object.

BACKGROUND OF THE INVENTION 
The present invention relates to a hand held tactile toy or amusement 
device having exterior surfaces of differing texture and resiliency. The 
sensation associated with holding and manipulating an object comprising 
different textures and/or resiliency provides both physical and 
psychological pleasure, particularly a sense of calmness and sereneness. 
The device can therefore aid in reducing anxiety as well as induce a 
comfortable, relaxed state of mind. 
BACKGROUND ART 
The following patents typify hald-held objects which have components which 
are pliable to some degree. 
U.S. Pat. No. 1,549,710 describes an oblong object having a compressible 
outer shell and an inner core of air. 
U.S. Pat. No. 3,265,389 describes an object of uniformly resilient material 
having open areas. 
U.S. Pat. No. 2,994,530 describes an object for exercising particular parts 
of the hand. Two connected rigid gripping bodies are provided with a wrap 
of a spongy resilient pad to provide a secure grip when the two grip 
members are compressed toward each other. 
U.S. Pat. No. 4,040,619 describes an exercise device comprising a flexible 
hour-glass shaped object, having two interior compartments containing a 
liquid which can be squeezed from one compartment to the other. 
U.S. Pat. No. 4,754,963 describes a hand held exercise device having a 
generally puck-shaped body of resilient material within which are openings 
containing relatively rigid ball members held by friction in the openings 
of the resilient material. The inserted balls provide increased resistance 
to compression of the puck-shaped body. 
In common, none of these patents disclose a hand-held tactile object 
wherein a hard smooth body has a portion of its surface interrupted by 
cavities containing soft pliable bodies which protrude from the surface of 
the hard body. In contrast to the prior art devices, the present invention 
provides a generally rigid support body and requires little or no applied 
pressure to achieve the benefits of contrasting sensations of a hard 
smooth surface interrupted by one or more smooth pliable soft surfaces. 
SUMMARY OF THE INVENTION 
In accordance with the invention, a generally oblong smooth, hard body 
which resides comfortably in the palm of the hand is provided with at 
least one cavity within which resides a pliable, smooth, generally round 
or ellipsoid soft body. A portion of the soft body protrudes from the 
first body and provides an independent and localized area of contact and 
pressure with the hand. The tactile contrast of the smooth relatively 
unyielding surface of the hard body with pliable forgiving nature of the 
soft body provides a pleasing sensation to the holder. The object can be 
manipulated so that different portions of the hand come in contact with 
the pliable second body, thus moving the contrasting of hard/soft bodies 
to differing sensing areas of the hand.

DETAILED DESCRIPTION OF THE INVENTION 
Referring to FIGS. 1 and 2 of the drawings the device of the invention show 
is a hand held tactile object 10 which comprises a smooth hard body 11 
whose surface has a cavity 12 which is adapted to receive a generally 
round, smooth soft body 13 made from a pliable material. The soft body 12 
fills only a portion of the cavity, there being at least a substantial 
portion of the soft body which protrudes from the cavity and extends 
beyond the surrounding surface areas of the hard body 11. The size of the 
hard body 11 is that which would comfortably fit within the human hand. 
Different sizes could be provided for persons of different hand-size or 
growth. A generally oblong shape is shown for the rigid body as this is a 
comfortable shape for the hand and maximizes the area of tactile contact 
and hence sensation. The soft body, on the other hand, provides a separate 
area of contact. Because it protrudes, the soft pliable nature of the body 
will necessarily be sensed when the object is held and squeezed. However, 
the different sensation does not require much pressure, and ordinarily the 
weight of the object itself will suffice the "squeeze" the smooth 
resilient body when the latter is positioned against the palm of the hand. 
The important feature is that both bodies be relatively smooth, i.e., not 
rough, and that both be of substantially different resiliency. Although 
overall smoothness is preferred, the hard body 11 can have some texture, 
such as the strippled effect of leather. The hard body can be made of any 
relatively hard material, such as rigid plastics, glass, hard rubber, 
reconstituted marble, reconstituted stone, metal or wood. Glass, stone, 
metal and plastic tend to give a "cool" feel, not unlike that of crystal 
hand-coolers. Wood and hard rubber give a warmer silky feel. 
Suitable plastics are, for example, acrylic or Lucite.RTM.. Plastics and 
glass can be clear, but they may also be pigmented or not, to make the 
hard body a colored transparent, translucent or opaque material. The soft 
body 13 can be formed from any of the generally known elastomeric 
polymers, synthetic or natural. For example, elastomers of 
polybutadiene/styrene, cis-polybutadiene, butyl rubber, ethylene-propylene 
rubber, and polyisoprene are useful. It is generally preferred that such 
elastomers be from formulations of relatively low hardness and high 
softness, in order to maximize the contrast with the hard body 10 and to 
allow depression of the resilient body 12 with relatively little pressure. 
Although a resilient elastomer is preferred, it is also contemplated that 
the soft body be made from malleable materials that maintain their shape 
to some degree when distorted, such as shape-memory polymers of 
transpolyisoprene. 
A preferred embodiment of the soft body 12 is depicted in FIG. 3. That 
figure shows a soft body 14 having an outer skin or shell 14 of a soft 
elastomer and an inner core 15 of a viscous liquid or gel-like substance. 
Very low molecular weight elastomeric polymers make an appropriate gel or 
liquid core. The combination of FIG. 3 gives a particularly soft, pliable 
feel and can be depressed with little energy. A preferred example of such 
a composite elastomeric structure is a silicone elastomer filled with a 
silicone gel. Silicone elastomers are well known (e.g., Sylgard.RTM. 184 
or Silastic.RTM. Q7-2213 or Q7-2630 from Dow Corning Corp., Midland, 
Mich.). The base silicone polymer can be formed by known means into a 
tough, pliable, virtually transparent film. The film preferably has a 
thickness of between about 0.007 inch and 0.020 inch, with 0.010 inch 
being preferred. Thicknesses outside this range may be used but are less 
preferred because thinner thicknesses increase the risk of puncture and 
thicker ones have less tactile appeal. Typically the film is built up on a 
mandrel through repeated dippings in a bath of siloxane polymer. When the 
desired thickness is reached, the film is vulcanized and then sealed into 
a generally round shape with a silicone adhesive, like, for example, 
Silastic.RTM. adhesive from Dow Corning. The shell 16 thus formed can then 
be filled with a clear siloxane gel, for example, polydimethylsiloxane 
(PDMS). A PDMS gel system is available commercially as Q7-2218, 
Q7-2167/Q7-2108, or Q7-2150/Q7-2146 Silicone Gel Systems from Dow Corning. 
The gel itself is made in known manner by curing the gel base resin with a 
suitable polysiloxane hardener. The filling step can be done with a 
hypodermic needle, the hole being sealed with silicone adhesive. 
Previously prepared encapsulated gels of the type described exist in 
commerce and have been used in medical applications such as in female 
breast repair and testicular implants. 
The weight of the object 10 is normally dictated by the composition of the 
hard body 11. For lighter weights an acrylic plastic can be used. If a 
heavier weight is desired, one can select from the heavier materials such 
as stone, metal and glass. The selection of materials may also be dictated 
by the desire to achieve a certain visual appearance, e.g., clear vs. 
opaque, or dark vs. light, or metallic vs. glass-like. 
The gel-filled soft body 13 of FIG. 3 is generally clear and can provide a 
pleasant visual contrast with the various choices of materials available 
for the hard body 11. It is also contemplated by this invention to achieve 
visual effects in addition to those dictated by the choice of materials 
for the rigid body and the soft body. The gel 17 may itself be pigmented 
to provide additional visual effects. It is also contemplated by this 
invention that the core of the soft body 13 contain, in addition to the 
gel or viscous liquid, admixed thermochromic liquid crystals which are 
capable of changing color in reaction to temperature changes created by 
the warmth of the hand, as by the pressure of the hand. Such crystals, 
also known as cholesteric or chiral nematic crystals, change color at low 
temperatures, generally going from clear to red as the temperature is 
changed or pressure is increased and then on to other colors as the 
temperature or pressure continues to change. When using such crystals in a 
clear soft body 13 of the invention, the back of the cavity 12 is suitably 
colored flat black to provide better contrast and visualization. It is 
preferred that such crystals be of the micro-encapsulated variety. 
Thermochromic liquid crystals are available from Hallcrest, Inc. of 
Glenview, Ill. The amount of such crystals needed to provide a desired 
visual effect, depending on the clarity of the soft body 13 and the 
reflectivity of the selected cavity, can be readily established through 
trial. 
As noted, the capsules or soft bodies are of generally round shape, but 
they may also be oblong, egg-shaped, pear shaped, etc. Thus, by "generally 
round" I do not limit myself to spheroids, but include ellipsoid bodies 
having substantially continuous surfaces wherein at least some of the 
plane sections are circles or ellipses. A round clear body will behave 
naturally like a magnifying a lens. Therefore it is further contemplated 
by this invention that the cavity of the hard body can contain a colored 
symbol, insignia, message or other image which will be magnified by the 
clear soft body Referring to FIGS. 11 and 12, such an embodiment is 
depicted wherein an image 25 located between the cavity and the soft body 
is magnified when viewed from the front. It could be used, for example, to 
provide indicia of an event, organization or award. The whole object 10 
could therefore be suitable for presentations, advertising, and 
promotional gifts. The image to be observed through the soft clear body 
could be attached in any suitable manner such as a coating applied to the 
cavity wall or on the adjacent surface of the soft body or on a separate 
film or sheet placed in the back of the cavity before the soft body is put 
in the cavity. 
Depending on the rigidness and relative resilience of the hard body and the 
soft body, the latter may either be held in the cavity by friction, or by 
an adhesive appropriate to the selection of materials. In most cases, an 
adhesive will be required. In the event no adhesive is used, the soft body 
may be removed and exchanged for other soft bodies of contrasting 
properties (e.g, colored rather than clear, or containing thermochromic 
liquid crystals, or containing a different symbol on the interior 
surface). 
The hard body may be provided with a multiplicity of cavities containing 
soft bodies. FIGS. 4 and 5 depict such an embodiment. There, the hand held 
tactile object 16 comprises a hard smooth body 17 having several cavities 
which receive smooth soft, pliable protruding bodies 18. This embodiment 
spreads out the areas of soft contact when the object is held in the hand 
and thereby changes the over-all tactile information the holder senses. 
The number of such soft contact areas and hence the relative sensations 
between softness and hardness is obviously a matter of choice. Conceivably 
the entire surface could be covered by the soft bodies in which case the 
sensation is almost totally one of smooth softness supported by the heft 
and weight of the hard body 17. FIG. 10 depicts such an embodiment. Here 
too, any of the soft bodies, when made of a clear material such as 
silicone elastomer/gel, could be modified to contain thermochromic 
crystals, pigmentation or magnified indicia as indicated above for the 
single soft body. However, with the multiple soft bodies, one could 
provide each or any of the bodies with different such treatments thereby 
creating, if desired, image/patterns from the composite effect of the 
differing treatments of individual soft bodies. 
Users of tactile toys take particular pleasure in observing and handling an 
object in the shape of an animal. Hence, it is advantageous to make the 
body in the shape of an animal, such as a bird, rabbit, cat, etc. FIG. 6 
depicts such an embodiment in the shape of an owl 19. The cavity for 
receiving the soft body 21 is located in the breast area of the hard body 
20. The contours of the body are kept smooth and with a minimum of sharp 
features or detail so that the object as a whole will still feel 
comfortable in the hand. The user could derive tactile pleasure by gently 
touching or poking the animal in the soft area of the central body with 
the finger from one hand while holding the animal in the other, or the 
user could hold the object in the palm of the hand, squeezing the soft 
component against the fat of the palm or by the thumb. 
FIGS. 7 and 8 depict another embodiment in which the hard body 22 resembles 
a hollowed out semi-ellipsoid, the cavity being substantially co-extensive 
with a plane through the central axis of the ellipse (as shown in FIG. 7). 
A single relatively large soft body 24 resides within that cavity. In this 
embodiment the single soft body has almost the same contact area with the 
hand as the hard body.