KR20010035360A - Mobile computer with versatile functions usable during move - Google Patents

Abstract

PURPOSE: A mobile computer having complex functions and used during moving is provided for a user to offer a convenience by storing a mobile phone and a mobile cassette tape in a notebook computer. CONSTITUTION: The upper surface of a mobile computer consists of a monitor and the lower portion of the computer consists of a keyboard. The back upper surface of the computer consists of a speaker(10) and a mike(11), and the right upper end of the upper surface consists of a headset connection jack and a communication connection jack, and the right surface of the computer consists of a power switch button, a sound adjusting slider. A snap fastener is mounted on the lower portions of the left and right surface for engaging to a case. A printed circuit board is built in a main body of the computer, and mobile phone dial and function keys are provided at the left surface of a main body. If the printed circuit board is connected to a communication modem, it is possible to transmit/receive in wireless to a wanted person and to connect to a wireless internet. A radio receiving device and a cassette player are built in the computer, and a digital tuner displaying window(7), a digital tuning adjusting bar(71) and a cassette tape inserting/extracting groove are provided at the side portion or the lower portion of the speaker(10) a mike(11).

Description

Mobile computer with versatile functions usable during move}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile computer that can be used on the go. In particular, a cassette player widely known as a mobile phone and a walkman, which are information and communication devices that can be used regardless of time and place, indoors or outdoors. A secondary radio receiver is built into the main body of the mobile computer, and each function is to provide a device that can be used in combination with each module simultaneously.

A conventional personal desk-top computer (PC) is a machine having a function of processing information inputted by an input device according to a process defined by computer properties and outputting a result. In addition, the phenomenal development of the microprocessor chip, which is the core of the central processing unit (CPU), has greatly improved the processing speed of data, as well as the main memory RAM or the hard disk hard disk. The amount of memory has increased dramatically. In terms of application, the application software (Software, S / W) has been developed in a fantastic variety, so you can enjoy a lot of business and personal affairs as well as entertainment such as various games. Reading, learning, listening to music, etc. can be output by reading books, videos, music, etc. stored in CD-ROM, etc. Although it is a very useful device as an all-round machine that can access the Internet and search for necessary information, its large volume and weight make it portable. In particular, e-books are useful only when they can be seen anywhere, anytime. E-books can eliminate all the cumbersome printing equipment, huge equipment costs, and complicated distribution process of paper books made through complicated bookmaking process, making it easier to produce books and lowering the price of books. It is very easy to get a book by selecting a book by paying a book price wirelessly, downloading it on the web, and reading or learning through a monitor. However, if such an e-book can be printed only on a desktop computer, the above usefulness is halved do. Therefore, the development of e-books and the Internet depends on the development of computers that can be used stably on the go. Many companies are currently developing e-books in various ways, including how to store content on CDs, mask ROMs in ROMs, etc., and Microsoft's Extensible Markup Language (XML), a format developed by US companies. Representative e-book technology is a method of storing text information as digital files and distributing them through a viewer, such as Adobe's Portable Document Format (PDF). We are also developing additional technologies such as technology to prevent unauthorized copying of e-books and selling contents of e-books. However, we can easily utilize e-books produced by any production method on the go. There was no prize, and the desktop computer is not portable despite its usefulness. In order to solve this problem, various types of portable computers have been developed.

The laptop computer (Lap-top computer) closest to the function and performance of the desktop computer is a computer that can be used on a lap at the size of a briefcase and can be used as a liquid crystal display (LCD) or a plasma display panel. It can be connected to internet through modem and communication line, but its weight is 3 ~ 10kg and it is not used as a portable computer because it is heavy to carry.

Note-book computer, which is lighter than the laptop computer, can be carried and used by the built-in rechargeable battery even without a separate power supply, and can be used for liquid crystal display (ICD) or plasma display (PDP). It was developed as a personal portable computer with a flat panel integrated into the main body and made into an A4 size notebook. Especially, this display device is suitable for connecting to the Internet through a communication modem and searching for necessary information. In addition to the high price-to-performance ratio, various types of cards can be inserted into a CD drive or PCM CIA to be used for various purposes such as desktop computers. . However, the notebook computer cannot be used when walking or standing, and if you want to sit and use it on your knees, you need to flip the monitor, which is a display unit, back to the horizontal to get the user's vision. Stability is deteriorated, and when a notebook computer is used, it is usually placed on a desk or on an inclined flat solid. When using it on a desk, even if a slight external force is accidentally applied to the monitor, it is easy to move backwards, so use caution. After all, a notebook computer is a portable computer, but it is not suitable for use on the go, so there is a drawback that even when a wireless information communication terminal is connected to a notebook computer or a wireless modem is installed, the Internet cannot be used while moving.

Palm-top computer can be placed on the palm of your hand and can be used regardless of time and place.It can be used regardless of your posture.However, the storage capacity is too small and the keyboard is small. As it is not used, it is used with electronic organizers such as schedule management and address book. A hand-held computer is the size of a handheld calculator that fits in your pocket in a compact computer that fits in one hand. Therefore, the palmtop computer or the handheld computer has its own storage capacity too small, and the auxiliary storage device or communication modem cannot be built in, so its use is extremely limited and the use of the work or the Internet is inappropriate. Personal digital assistants (PDAs), which are in widespread use, are high-performance electronic notebooks with simple data management such as address book management, calendar memos, and e-mail checking. It is compatible and can be connected to a mobile phone or attaches a separate communication module for internet access.However, it is inconvenient to input data due to the lack of a keyboard.The storage capacity is too small for general business use. You must have a subscription to access the Internet.

The portable computers developed in general are composed of a liquid crystal display (LCD) or a plasma display (PDP), which is a flat panel monitor unit, and recently, an organic electroluminescence device (organic EL). New flat panels are being developed. The portable computers are composed of two parts, a monitor and an input device keyboard, so that the two parts are folded and overlapped when being carried and moved, so that the surface area is reduced to half, making it easy to carry. It is supposed to be. All in all, a laptop with a fast central processing unit, a large main memory, a secondary memory, and a monitor of the right size to fully search and utilize the rich information of the Internet is easy to carry, As it is not suitable, it is not easy to use e-books or access to the Internet while the laptop computer is too heavy to carry, whereas the portable palm-top or handheld computer has a slow processing speed and a small storage capacity. There is a problem that the use is limited and access to the Internet is not possible.

Mobile phones, which are portable wireless information and communication devices, are widely used by almost all adults because of the convenience of communicating with anyone who wants anytime, anywhere, and the Internet and web browsing on the go. It becomes the fourth necessity. However, the text input method is too inconvenient to access the Internet and browse the web, and the search box and storage capacity are so small that the device for exchanging, searching, and storing necessary information is very inadequate. And the communication fee is expensive.

The cassette player unit radio receiver, commonly referred to as a conventional walkman, has no problems in listening to broadcasts or playing and recording audio signals of cassette tapes, which are inherent to the device itself. Because it must be provided separately, it was not possible to use other than the audio function outdoors. In order to solve the problem of having to prepare a dictionary separately when studying a foreign language, Korean Utility Model Publication No. 1999-4055 (1999.01.25.) Proposes a `` cassette player with an electronic dictionary notebook '', which is attached to the front of the cassette player. Although the monitor provides a device for querying the words of a foreign language, the storage capacity is so small that it cannot contain all the words and examples contained in the dictionary that is on the market. There was a drawback that the learning efficiency was low because there was no space to store the textbooks, so it was only learning to listen to the cassette tapes without the textbooks.

In addition, when a user wants to access the Internet, talk on a wireless phone, or learn audio from a place other than his or her work or home, he or she needs to purchase a portable computer, a mobile phone, a walkman, and so on. Not only have to carry and carry each device when going out, there is a problem such as inconvenience and hassle to operate each device in each storage position even when using.

Therefore, the main object of the present invention is to improve the conventional notebook computer to be able to use while moving to solve the above problems, and to integrate the mobile phone and walkman, etc. built in the main body and can use the respective functions in combination In order to improve its utility, it was devised. In other words, it is possible to use a conventional laptop computer that has sufficient storage capacity and can use an auxiliary storage medium or PCM CIA while operating or standing while walking or standing in public transportation. You can also print or read e-books downloaded through Mask ROM or Web, or you can connect with the built-in communication modem to connect to the Internet or wirelessly communicate with your mobile phone. Instead of listening to the music or news you want with the built-in radio receiver, you can learn broadcasting and communication education while watching the textbook on the monitor. If you look at the textbook on the monitor attached to the unknown word content While viewed as a pre-mas chrome it is an object to provide a device capable of studying a foreign language. In short, it is an invention in which a computer, a mobile phone, a radio receiver, and a cassette player are integrated and mounted in one main body, and when each function is used, each module operates as a module and a plurality of functions can be used at the same time. You can also watch TV broadcasts anywhere by embedding a TV receiver in the main unit.

1 is a front view of the main body of the present invention

2 is a left side perspective view of the present invention in which a mobile telephone is incorporated into a mobile computer.

3 is a rear and right perspective view of the present invention in which a cassette player and a radio receiver are incorporated in a mobile computer.

4 is a perspective view of a mobile computer storage case

5 is a perspective view and a cross-sectional view of a mobile computer according to a modified embodiment

6 is an enlarged view of a cross-sectional view of FIG.

FIG. 7 is a state diagram just before the keyboard is fully drawn out and connected to the connector in FIG.

FIG. 8 is a perspective view before the keyboard is connected to the main body by a connector in the modified embodiment of FIG.

9 is a state in which a mobile user uses a mobile computer.

※ Explanation of symbols for main parts of drawing

1 ... Body 2 ... Monitor 3 ... Keyboard 4 ...

5 ‥ · Case 6 ‥ ・ Dial button for mobile phone

7 ... Digital tuner display window 8 ... Cassette tape insertion and removal

9 ‥ ・ Headset connecting jack 10 ‥ ・ Speaker

11 ‥ ・ Mic 12 ‥ ・ Underlay 13 ‥ ・ Skip the bookcase 14 ‥ ・ Bookmark

21 Keyboard room 22 Shaft 23 Track perturbation roller

24 ‥ ・ Track 25 ‥ ・ Keyboard connector 26 ‥ ・ Keyboard connection port

51 ‥ · lid 52 ‥ · Suspenders first section 53 ‥ · Suspenders second section

54 ... suspenders 55 ... suspenders third section 56 ... female button 57 ...

61 ‥ Antenna 62 ‥ Mobile phone dial window

71 Tuning adjustment bar 81 ... Cassette player control buttons

91 ‥ ・ function select button

In order to provide a structure of a mobile computer for achieving the above object, a monitor and an input device keyboard, which are output devices of a conventional notebook computer, are integrated into a single plane, and the front side is about 2 / 3 The upper half constitutes a flat panel such as a liquid crystal display (LCD) or a plasma display (PDP), and the lower half of about 1/3 constitutes an input device of a keyboard, and serves as an auxiliary so that the present invention can be used while moving. Provides connections for the case and suspender components. The present invention differs from the conventional notebook computer in that the monitor and the keyboard are integrally formed in one plane without being folded, and the case is provided with a suspender component that can be used while moving. This is a light that can be used in combination with other built-in functions.

Referring to the accompanying drawings, a preferred embodiment of the present mobile computer that can be used while moving is as follows.

1 is a mobile computer according to a first preferred embodiment of the present invention, and FIG. 4 is a perspective view of a case providing a means for using a computer even when moving in combination with the mobile computer.

The upper surface of the mobile computer is composed of a monitor (2), the lower part of the keyboard (3), the rear top of the speaker 10 and the microphone 11 is built-in, the upper right end of the headset connection jack (not shown) And a communication connection jack (not shown), and a power switch button, a volume control slider (or knob), and the like are provided on the right side. At the bottom of the left and right sides of the main body, a fastener (external) (4) is mounted, which is fastened when combined with a case of hard material for use during movement.

Female fasteners (Internal) (56) (56) is mounted on the middle of both sides of the case (5) to engage with the means weight (4) when the case and the main body is engaged. The length L from the female button 56 to the lower end of the case is the length to pull the main body out of the case for use during movement, which is approximately the length of the keyboard. The suspenders, the first suspenders 52, the second suspenders 53 and the suspenders 3rd section 55 are made of hard materials and have the same width and thickness as those of the suspenders 54. And, the length from the position where the first suspender 52 is fastened to the upper left side of the case by rivets to the position connected to the second suspender 53 and the pivot is equal to L. Therefore, when the main body is pulled out by the length L from the case in order to use the mobile computer during movement, the top of the mobile computer comes to the position of the top of the suspenders first node 52. The lower end of the suspenders second section 53 is formed with a support 59 for supporting the mobile computer. Suspenders third section 55 is fastened by rivets on the lower right side of the case, and the suspenders 54 of the fiber material are connected between the suspenders second section and the suspenders third section. A fastener is attached to the upper right side of the case so that the suspender connected to the third suspender can be fixed to the right side of the case. When the mobile computer is placed in the case and the shoulder fastener is attached to the shoulder, the case can be stabilized by joining the fasteners. .

When using this mobile computer at a desk in a home or office, the main body can be taken out of the case and installed according to the user's preference by tilting the base of the main unit slightly inclined, or by using the mobile computer in close contact with the floor while the base is folded. In this case, the suspenders bonded to the upper right side of the case by the surface fasteners are released, and the body 1 is pulled out of the case by L, and the female buttons (Int. Snap fastener) 56 of the case and the means weights on the lower sides of the main body ( Ext.snap fasteners (4), and the first suspenders are kept in parallel with the main body so as to be in close contact with the left side of the main body, and the second suspenders are rotated at an obtuse angle with respect to the first suspenders. Support the lower supporter 59 so that the top of the back of the main body is covered, and then turn the suspenders 54 back to the neck and diagonally across the back from the left shoulder. Carried to go down as shown in Figure 9 when in close contact with the bottom of the case to upper abdomen is in a state that is available to the mobile computer in a stable manner. At this time, the keyboard of the mobile computer is separated from the chest by the length L, so keyboard input is easy. In other words, to provide a means that can be used while moving the mobile computer is provided by a case having a special shape of several sections of suspenders.

2 is a printed circuit board capable of transmitting and receiving wireless information communication to a mobile computer that can be used stably as described above, and the dial and function keys (6) for a wireless mobile phone on the left side of the main body Coupling with a communication modem allows you to send and receive wirelessly with anyone you want, anytime, anywhere. When the mobile computer is placed in the case and the user wants to communicate while moving, the user can dial directly from the mobile phone dial window 62 provided on the left side of the case and handset the headset. However, in general, the charges for wireless mobile phones are expensive and low speed. Therefore, when using the Internet for a long time, the local area network (LAN) can be used in places where a local area network (LAN) is installed or where a high-speed internet network is installed. The main body is provided with a communication connection jack (not shown).

3 shows a digital tuner display window 7 and a digital tuning adjustment bar 71 incorporating a radio receiver and a cassette player in the mobile computer, and on or under the speaker 10 and the microphone 11 on the rear of the main body. By disposing the cassette tape inserting slot 8, the user can listen to radio broadcasting and music while traveling, learn foreign language listening, and learn while watching the textbook using a monitor. The main body also has a port for connecting a mouse (PS-2 type port) that can be used occasionally.

FIG. 5 shows a mobile computer according to a second embodiment of the present invention, which is a two-piece type in which an output portion of a monitor and an input portion of a keyboard are separately configured. The two-piece mobile computer is also characterized by being configured as a drawer type so that the keyboard can be embedded in or withdrawn from the body, rather than a folding type like a notebook computer. Therefore, the present invention provides a device that allows the keyboard to be drawn out when the mobile computer is used in the main body. To this end, inside the left and right sides of the main body, the tracks 24 of which the middle portion is curved upwardly are laid four at two on one side, and the shafts 22 with the shaft rollers 23 which perturb along each track are attached. ) Is attached to the left and right sides of the keyboard, and the length of the shaft is such that the end of the shaft 22 is in the same position as the ends of the tracks 24a and 24c when the keyboard 3 is completely inserted into the main body. do. The four tracks are the same shape and start horizontally at the end and extend horizontally backwards to allow the keyboard to bend upwards and backwards, just before the keyboard exits the keyboard room until the keyboard reaches the same level as the monitor. When it is completely withdrawn and reaches the same level as the monitor, it can be pushed back. In this case, the keyboard connection connector 25 is provided on the upper side of the keyboard so that the keyboard connection connector and the keyboard connection port can be coupled, and the keyboard connection port 26 is embedded in the lower side of the main body. On the right, left, and bottom of the monitor (2) on the top of the main body, editing keys such as Page Up, Page Dn, Home, End, Insert, and Delete, direction keys, flip through the bookshelf (13), and bookmark (14) are provided. do. This two-piece mobile computer can output the e-book to the monitor and then insert the keyboard back into the main body to reduce the volume of the computer when reading, and only flip the bookshelf (13) and bookmark (14) keys arranged around the monitor. It is easy to handle and use because it can be operated, and it becomes very convenient when viewing the e-book by public transportation. The basic shape of the storage case of this two-piece mobile computer is the same as that of Fig. 4, but the overall dimensions are set to the size of the body when the keyboard is inserted into the body, and the length of the first leg of the suspender is set to the length of the L + keyboard. . The method of using the computer of the second embodiment while moving is the same as the method of using the mobile computer of the first embodiment.

The microphone and speaker circuits built into the main unit are connected directly to the first circuit directly connected to the mobile phone, the second circuit connected in parallel to the Internet of the mobile phone and the function selection button, and to the circuits of the mobile phone and the computer in parallel. The mobile telephone button in the function selection button while being connected in parallel to the third circuit where the circuit is interrupted by the device of the mobile phone button in the function selection button and the computer power switch button, and the circuits of the mobile phone and the radio. Fourth circuit where the circuit is interrupted by the device of a button and a radio button, a circuit which is connected in parallel with the circuits of a mobile phone and a cassette player, and a circuit which is interrupted by the device of a mobile phone button and a cassette player button in a function selection button. It consists of 5 circuits. The circuit of the headset connection jack is connected to the circuit of the speaker and the microphone, and the circuit of the speaker and the microphone is cut off when the plug of the headset is inserted. The mobile phone is always powered when the mobile computer is in use or stopped. The circuit is designed to activate the ringing tone whenever a wireless phone is received, and the call can be made using the built-in speaker, microphone, or headset. can do. When the mobile phone is received while the radio or cassette player is in operation, pressing the mobile phone button in the function selection button enables the radio signal of the radio or cassette tape to be muted and wirelessly transmit and receive.

Referring to the operation of the multi-functional mobile computer configured as described above are as follows. When a user selects a desired function, that is, a computer, a mobile phone, a radio, or a cassette player by using a function selection button, a unique function according to each property of the module is activated. In order to further improve the utility value of the present invention, even when the two functions are used in combination, they can be used in combination by pressing and simultaneously pressing a desired function. Complex functions include computers and mobile phones, computers and radios, computers and cassette players, and radio and cassette players. For example, if you want to connect to the Internet while you are on the go, press the computer power switch and the Internet button on the function selection button to connect the built-in mobile phone to the communication modem and enter the Internet mode. It is possible to use the Internet more efficiently because it can search the text and image information by accessing the Internet with the much larger monitor and convenient input device of the mobile computer than by the web browsing method. When a securities investor searches a market by searching a securities site in the above-mentioned Internet mode, he / she conducts a trade on the Internet directly to a trading securities company where an Internet account is opened while searching a market on a computer for reference. By ordering securities investment can be timely, the monitor of the present invention is much larger than the search window of the mobile phone, it is possible to search a plurality of trends or market conditions and charts of interest items. When a user learns a foreign language with a cassette tape, select the computer power switch and the cassette player function from the function selection button, then output the textbook stored on the computer to the monitor, insert the cassette tape into the cassette tape inlet and insert the cassette player operation button. By pressing the play button, you can achieve the desired learning. In case of learning books, reference books, various foreign language dictionaries, general books, etc., character information signals are computer-programmed. When you want to search the contents of a book stored in a read-only memory (ROM) as needed, the central processing unit immediately retrieves and processes the data and outputs it as text information or video information signal to the monitor of the mobile computer. When learning a foreign language, the textbook stored in the storage device can be displayed on the monitor, and the audio signal stored in the cassette tape can be reproduced and amplified and listened to by a built-in speaker or a headset. When taking a course by radio broadcasting instead of a cassette tape, instead of the cassette player, the frequency of a radio receiver is adjusted to receive radio waves, modulated them into an audio signal by an internal amplifier, and then listen to the speaker or a headset. Since the mask ROM is high in density and advantageous to mass production, if the textbook, various dictionaries, and reference books of the mask ROM are embedded in the mobile computer, one of the present inventions can carry out the school teaching and learning of the students. If you select the radio reception and cassette player functions in the function selection button, you can store (record) the music as a voice signal on the cassette tape when music loved by the radio is received.

This mobile computer can be used stably even when you are on the go, so you can use the Internet by connecting the built-in mobile phone and communication modem anywhere and anytime. · You can look up, and text input method is easier than mobile phone, so you can browse the web more effectively. When you study with cassette player, you can learn by watching textbooks and dictionaries. It is much more effective than a notebook, and it has a much larger storage capacity than a portable computer, and is configured to be easy to use while moving, so that many electronic books can be stored and read on the go. The advantage of storing the e-book and easily using the e-book on the go can achieve the following chain effects. Above all, the publication of electronic books becomes more active and cheap e-books can be easily obtained, and students can store various learning books such as school textbooks and reference books printed on paper in the present invention and store them in bags according to the daily schedule. Instead of going to school, you can carry your computer to school with all the books you need as an e-book, save yourself the heavy lifting of carrying a heavy bag, become familiar with your computer from a young age, become adept at computer operation, It is possible to speed up / advanced informatization of information, and it is easy to review and self-study because it is possible to use the mobile computer stably when going to and from the subway, and the production of electronic books is much cheaper than printing on paper even when publishing books. Can be produced at a cost to promote a publishing and authoring culture. Therefore, this mobile computer user can read e-books at low cost, thus increasing the people's access to books, which will improve the people's level of consciousness and reduce the environmental damage by reducing demand for paper pulp. When moving, heavy and bulky books are not transported, so moving costs and labors are saved, and environmental pollution caused by unnecessary disposal of books is reduced. This effect is because the development and settlement of e-books is possible with the development of mobile computers that provide a means that can be used on the go. Recently, a computer connected to an asymmetrical digital subscriber line (ADSL) has been installed in a place with a lot of people's traffic, and when a certain amount of coins are put in, a public Internet can be used for a certain period of time. It won't be long until high-speed or satellite Internet jacks are installed in public spaces for use.

Claims (3)

A computer body comprising a flat panel liquid crystal display monitor and a keyboard capable of outputting text and video information, a case of hard material for storing the computer, a suspender of hard material for use of the present invention, and a suspender of textile material. A computer comprising components, The monitor and keyboard are integrated into one plane to form a monitor on the front of the main body, and a keyboard on the bottom of the main body. Speakers and microphones are installed on the upper part of the rear, and a means weight is mounted on the lower left and right sides of the main body. The front upper half forms a lid, and the middle left and right sides of the case are equipped with female arms that can be fastened with a means weight mounted on the lower left and right sides of the main body. The first and second suspenders are pivotally connected, and the third and second suspenders are fastened by rivets at the bottom of the right side of the case, and between the second and the third suspenders of the fiber material. Suspenders are connected, the lower end of the second suspenders characterized in that the support 59 is formed to support the computer body East computer. In the two-piece computer of the flat panel monitor and the keyboard which can output a character and the image information, On the left and right sides of the main body, four tracks 24 each having a middle portion curved upwardly are laid on one side, and two shaft rollers perturbed along the track are attached to each side. It is attached to the side, and the keyboard can be inserted into or withdrawn from the inside of the main body like a drawer, and a keyboard connection connector 25 is provided on the upper side of the keyboard so that the keyboard is embedded on the lower side of the main body. It is installed to be connected to the connecting port 26, and the track for reversing the keyboard is installed to be connected to the keyboard connector and the keyboard connection port, and when the keyboard is embedded in the lower part of the main body A keyboard room is provided to accommodate the keyboard. Page Up, Page Dn, Home, End, Insert, and Delete are located on the right, left, and bottom of the monitor. Key, direction key, and the Flip shelves 13 keys, a bookmark (14) moves, characterized in that the key is provided a computer arranged device. 3. A main body according to claim 1 or 2, wherein a main body includes a printed circuit board, a radio receiver, and a cassette player device for a mobile telephone, and the printed circuit board for a mobile telephone is connected to a communication modem embedded in the main body. The mobile phone dial and function keys are arranged on the left side of the main body, and the digital tuner display window, the tuning adjustment bar, and the cassette tape insertion and exit slot are provided on the rear side of the main body. The volume control slider is installed below the function selection button and the cassette player operation button in parallel. The mobile phone dial window is installed on the left side of the case, and the function selection button and the cassette player operation button on the right side of the case. A mobile computer comprising a cassette player operating window operable to operate.