BACKGROUND OF THE INVENTION 0001 The present invention is related to a card-type anti-miss/anti-theft alarm device including a portable mainframe and an alarm sub-frame. The alarm sub-frame is designed as a thin card with a dimension smaller than or equal to that of an existent credit card, whereby the alarm sub-frame can be easily placed and hidden in a small-size article carried with a user, such as awallet, a suitcase, a portable computer, etc. In case the user misses the article or the article is stolen by a thief and spaced from the user by a certain distance, an alarm is emitted to warn the user. 0002 It often takes place that a person misses a portable article or even a kid in a hurry. In order to solve this problem, a portable detection alarm has been developed. Such detection alarm includes a tracing transmitter and a cooperative receiving alarm. The transmitter continuously transmits intermittent a signal of a certain frequency for the receiving alarm to receive. In case the transmitter is spaced from the receiving alarm by a distance exceeding the monitoring range and the receiving alarm can hardly receive the signal, an internal alarm is driven to emit an alarm. In use, the tracing transmitter and the receiving alarm are respectively placed in a user and a portable article or a kid. The activation of the alarm is determined by whether the distance between the tracing transmitter and the receiving alarm exceeds the preset distance. The alarm is able to prevent the user from missing the article or the kid. 0003 However, the tracing transmitter and the receiving alarm of the above portable detection alarm have large volumes so that it is inconvenient to carry such alarm device and the alarm device can be hardly well hidden. Also, the application of such detection alarm is quite limited. Such detection alarm is only applicable to specific large-size article and is easy to be found a thief. As a result, the thief can easily disassemble the alarm and make the user hard to locate the article.

SUMMARY OF THE INVENTION 0004 It is therefore a primary object of the present invention to provide a card-type anti-miss/anti-theft alarm device including a portable mainframe and an alarm sub-frame. The alarm sub-frame is designed as a thin card with a dimension smaller than or equal to that of an existent credit card, whereby the alarm sub-frame can be easily placed in or sandwiched between layers of a small-size article carried with a user. Accordingly, the alarm sub-frame can be well hidden and more mobilely used. A thief can hardly find the alarm device and disassemble the same. 0005 The present invention can be best understood through the following description and accompanying drawings wherein:

BRIEF DESCRIPTION OF THE DRAWINGS 0006 FIG. 1A is a perspective view of the portable mainframe of the present invention; 0007 FIG. 1B is a perspective view of the alarm sub-frame of the present invention; 0008 FIG. 2 is a block circuit diagramview of the portable mainframe of the present invention; 0009 FIG. 3 is a circuit diagram view of the portable mainframe of the present invention; 0010 FIG. 4 is a block circuit diagram view of the alarm sub-frame of the present invention; 0011 FIG. 5 is a circuit diagram view of the alarm sub-frame of the present invention; 0012 FIG. 6A shows that the portable mainframe of the present invention is carried with a user; 0013 FIG. 6B shows that the alarm sub-frame of the present invention is placed in an article; and 0014 FIG. 7 shows that hanging strings are tied on the portable mainframe and alarm sub-frame of the present invention via the string holes.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 0015 Please refer to FIGS. 1 to 4. The card-type anti-miss/anti-theft alarm device of the present invention includes a portable mainframe 1 and an alarm sub-frame 2. A user can hang or place the portable mainframe 1 on his/her body 30. The mainframe 1 is designed as a small thin sheet. The alarm sub-frame 2 is designed as a thin card. The dimension of the alarm sub-frame 2 is smaller than that of an existent credit card so that the alarm sub-frame 2 can be easily placed into a small article 40 such as a wallet or sandwiched between layers of an important article. Accordingly, the alarm sub-frame 2 can be hidden in the article and easily carried. FIGS. 2 and 3 show the circuit block diagram and circuit diagram of the portable mainframe 1. A central processing/controlling unit 11 serves as a control center of the mainframe 1. A power supply unit 12 supplies power for all the components of the mainframe 1. An intermittent oscillating transmission unit 13 receives the signal coming from the central processing/controlling unit 11 to intermittently transmit a high frequency radio signal wave. An optical reminding circuit 14 serves to emit a flickering signal for reminding a user to replace the power source in the case of weak power. 0016 Referring to FIGS. 4 and 5, the alarm sub-frame 2 includes a central processing unit 21 serving as a control center, a power supply unit 22 supplying power for all the components of the sub-frame 2, a signal receiving unit 23 for receiving the radio signal wave transmitted by the mainframe 1 and a sonic/optical reminding circuit 24. In the case that the signal wave coming from the mainframe receivable by the signal receiving unit 23 is weaker than the set value, the central processing unit 21 provides a controlling signal to the sonic/optical reminding circuit 24 to emit apparent warning sound and light so as to remind the user. 0017 By means of the separated mainframe 1 and sub-frame 2 of the present invention, it can be detected whether an important article is spaced from the user by a distance exceeding the set distance. If so, an alarm is emitted to warn the user. Both the mainframe 1 and sub-frame 2 are equipped with light emitting elements. In the case of exhaustion of power, the light emitting elements will remind the user. 0018 In addition, referring to FIG. 7, in order to facilitate carriage, the housings of the mainframe 1 and sub-frame 2 are formed with string holes 10, 20 for tying hanging strings 50 on the mainframe 1 and sub-frame 2. Accordingly, a user can wear or hang the mainframe 1 and sub-frame 2 on his/her body. 0019 The card-type anti-miss/anti-theft alarm device of the present invention is able to prevent an important article from missing or being stolen. Moreover, the card-type anti-miss/anti-theft alarm device of the present invention can help in finding the article. Especially, the card-type sub-frame has thin and small design and can be well hidden and more mobilely used. A thief can hardly find the card-type anti-miss/anti-theft alarm device and disassemble the same. 0020 The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.