Telecommunications – Receiver or analog modulated signal frequency converter – Combined with diverse art device
Reexamination Certificate
1998-03-24
2001-01-16
Tsang, Fan (Department: 2746)
Telecommunications
Receiver or analog modulated signal frequency converter
Combined with diverse art device
C455S090300, C455S274000, C455S351000, C343S718000, C343S720000, C343S788000
Reexamination Certificate
active
06175729
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention relates to a wrist-fit type communication device having the function of receiving and transmitting communication radio waves. More particularly, the present invention relates to a clasp structure of two wrist bands which are integrated with two antenna sheets, respectively, for forming a loop-like antenna when fitted to a wrist.
2. Description of Related Art
As portable transmitters or receivers, wristwatches with FM radios and wristwatch-type individual select call receivers have been known. In these portable communication devices, a wristwatch-type wrist-fitting communication device includes, as shown in FIG.
15
(A), a device main body
2
C containing communication circuits; a first wrist band
3
C covering a first antenna plate
30
C, extending from the 6 o'clock side of a wristwatch of the device main body
2
C, with a flexible insulating material; and a second wrist band
4
C covering a second antenna plate
40
C, extending from the
12
o'clock side, with a flexible insulating material. In addition, a clasp metal fitting main body
5
C electrically connected to the first antenna plate
30
C, and clasping hook metal fitting
6
C are fixed to the end portion of the first wrist band
3
C and a predetermined position of the second wrist band
4
C, respectively, as shown in
FIGS. 15
(B) and
15
(C). When the first wrist band
3
C and the second wrist band
4
C are clasped, the first antenna plate
30
C and the second antenna plate
40
C are electrically connected by these metal fittings.
Since the described clasp device is widely adopted for common watches, a detailed description thereof will be omitted. When the hook metal fitting
6
C is rotated around the axis of a connecting shaft
62
C so that it is overlapped onto the clasp metal fitting main body
5
C, after a hooking portion
61
C of the hook metal fitting
6
C has been hooked on one engagement shaft
51
C of two engaging shafts included in the clasp metal fitting main body
5
C, a catch portion
63
C of the hook metal fitting
6
C catches the other engagement shaft
52
C of the clasp metal fitting main body
5
C while it is elastically deformed, so that the first wrist band
3
C and the second wrist band
4
C are clasped.
As a result, the first antenna plate
30
C is electrically connected to the second antenna plate
40
C through the connecting shaft
62
C, the hook metal fitting
6
C, the catch portion
63
C, the engagement shaft
52
C, and the clasp metal fitting main body
5
C. In addition, if a presser plate
54
C supported by the engagement shaft
53
C on the side of the clasp metal fitting main body
5
C is raised, the clasp metal fitting main body
5
C can be slid on the first wrist band
3
C, so that the length of the band can be adjusted to the circumference of a user's wrist. At this time, since recessed portions
301
C are formed on the inner peripheral surface in the longitudinal direction of the first wrist band
3
C where the first antenna plate
30
C is bare at predetermined intervals, if the clasp metal fitting main body
5
C is shifted to the position where positioning projections
55
C of the clasp metal fitting main body
5
C are fitted to any of these recessed portions
301
C and thereafter, and the presser plate
54
C is folded, the clasp metal fitting main body
5
C is returned to a state where it is fixed to the first wrist band
3
C because a band presser pawl (not shown) is formed on the presser plate
54
C. In this state, the positioning projections
55
C are electrically connected to the first antenna plate
30
C in the recessed portions
301
C, so that the first antenna plate
30
C and the clasp metal fitting main body
5
C are electrically connected.
However, although the conventional wrist-fit-type communication device is of a type in which two separate wrist bands are connected through the clasp metal fitting main body
5
C and the hook metal fitting
6
C, the first antenna plate
30
C and the second antenna plate
40
C are integrated with the first wrist band
3
C and the second wrist band
4
C, respectively, and these antenna plates are covered with thick synthetic resin so as not to injure a user's wrist. Thus, the first wrist band
3
C and the second wrist band
4
C have poor flexibility compared with bands included in common wristwatches. For this reason, when the second wrist band
4
C is to be drawn after the device main body
2
C has been placed on the wrist and the first wrist band
3
C has been wound around the wrist, the second wrist band
4
C does not hang over the wrist but remains extended horizontally, so that the user's fingers cannot easily reach the second wrist band
4
C, whereby the problem of poor fitting to the wrist is encountered.
In consideration of the problems described above, an object of the present invention is to provide a wrist-fit-type communication device including two antenna plates integrated with the wrist band, respectively, wherein the fitting property to a wrist can be improved.
In addition, an object of the present invention is to provide a wrist-fit-type communication device including a contact mechanism capable of electrically connecting the two antenna plates with certainty even when the fitting to the wrist is improved.
SUMMARY OF THE INVENTION
In order to solve the problems, according to the present invention, there is provided a wrist-fit-type communication device including a device main body containing communication circuits; a first wrist band covering a first antenna plate, extending from one side of either the 6 o'clock side or the 12 o'clock side in a wristwatch of the device main body, with a flexible insulating material; a second wrist band covering a second antenna plate, extending from the other side, with a flexible insulating material; and a clasp device including a contact mechanism for electrically connecting the first antenna plate and the second antenna plate to form a loop-like antenna when the second wrist band and the first wrist band are clasped, wherein the clasp device has a three fold structure including a clasp lower plate of which a base end portion is fixed to the first wrist band; a clasp intermediate plate connected to a tip portion of the clasp lower plate through a first connecting shaft; a clasp upper box connected to a tip portion of the clasp intermediate plate through a second connecting shaft and fixed to the second wrist band; and a clasping lock mechanism which fixes the clasp upper box to the clasp lower plate when the clasp intermediate plate is rotated around the axis of the first connecting shaft and overlapped onto the clasp lower plate, and which can be released from the fixed condition.
According to the present invention, since the three fold clasp device is used for clasping the first wrist band and the second wrist band, the first wrist band and the second wrist band are clasped after passing a wrist through a ring formed by the device main body, the first wrist band, the clasp device, and the second wrist band. Therefore, unlike a case where the conventional separated two wrist bands are used, there is no inconvenience such that the wrist-fit-type communication device undesirably falls off of the wrist. Especially, since the first antenna plate and the second antenna plate are contained, and they are covered with the insulating materials, even when the first wrist band and the second wrist band are relatively hard, an operation of drawing the first wrist band after winding the second wrist band around the wrist is not required unlike the wrist band of two separated band-type, so that there is an advantage that the wrist bands can be easily fitted to the wrist.
In the present invention, synthetic resin, leather, nylon, synthetic leather, cloths, and so forth can be used as the insulating material for covering the antenna plates in the wrist bands. When the antenna plate is covered with synthetic resin as the insulating material, there is an advantage that the wrist band can be manufactu
He Zhujun
Saruwatari Tomozumi
Terasawa Dai
Jackson Blane S.
Oliff & Berridg,e PLC
Seiko Epson Corporation
Tsang Fan
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