JPH11202065A - Electronic wrist watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic wrist watch capable of cheaply producing in a short time with the same component constitution even with an electronic wrist watch of type of different display design and the like. SOLUTION: Provided are a time measuring means measuring time information, an indication means 4 in dot-matrix indicating the measured time information, a memory 12 storing at least one indication screen data indicated in the indication means 4. The indication screen consisting of the dot-matrix is constituted in the hard case body 2. In this dot-matrix, variable information image regions A and B for calendar information, time information, address information, etc., and a fixed information image region C expressing the body design of wrist watch are arbitrarily variably indicated on the indication screen by the indication screen data stored in the memory 12 and a control means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic wrist watch having a plurality of display screen designs by changing display screen data with the same device configuration.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture a plurality of types of electronic wristwatches, display designs and the like are different.
ED panels and the like were designed and manufactured for each model.

[0003]

As described above, in the conventional electronic wrist watch, since different designs and manufacturings are performed for each model, the development period of the product is lengthened and the development cost is also reduced. There was a problem that it took a lot.

[0004] Therefore, the present invention has been made in view of the above-mentioned problems, and even if the electronic wristwatch is of a model having a different display design or the like, it can be manufactured in a short time with almost the same device configuration.
It is an object of the present invention to provide an electronic watch that can be manufactured at low cost.

[0005]

In order to solve the above-mentioned problems, an electronic wristwatch according to the present invention comprises a time measuring means for measuring time information, and a dot matrix display means for displaying the measured time information. A memory for storing at least one display screen data displayed on the display means;
A display screen composed of the dot matrix is formed on the hard case body, and the dot matrix includes display information stored in the memory and variable information such as calendar information, time information, address information, and the like. It is characterized in that the image area and the fixed information image area expressing the design of the main body of the wristwatch are changed and displayed on the display screen at any time. According to this feature, by storing display screen data based on various display designs in the memory, a display screen including a fixed information image area and a variable information image area based on the display design can be used to display an arbitrary display screen. Developed electronic wristwatches with different display designs by creating display screen data based on the display design with almost the same equipment configuration, since the display will be displayed on the dot matrix display means that can be displayed In addition to being able to manufacture, greatly shortening the design and development periods and reducing development costs, since the equipment configuration can be made almost the same for each model, the cost of component equipment is also low. The electronic wristwatch can be manufactured at low cost.

In the electronic wristwatch of the present invention, a plurality of display screen data are stored in the memory, and an input means for switching the display screen is provided, and the display screen can be switched by an input from the input means. Is preferred.
With this configuration, a display screen based on a plurality of display designs is displayed on the display unit.
The owner can select and display a desired display screen at any time.

In the electronic wristwatch of the present invention, it is preferable that the memory is non-volatile and is detachable. In this way, by replacing the memory, an electronic wristwatch having a different display design can be easily obtained.

In the electronic wristwatch of the present invention, it is preferable that the memory is rewritable. With this configuration, the memory can be removed, the display screen data based on the new display design can be written and stored in the memory, and the user can change his / her electronic wristwatch to the new memory. Without doing this, an electronic wristwatch having a display screen based on these new display designs can be easily achieved.

In the electronic wristwatch of the present invention, it is preferable that the memory is built in a band portion. By doing so, it is not necessary to provide a separately removable memory, the number of parts can be reduced, the cost can be reduced, and display data based on a display design adapted to the band can be stored in the memory. Thus, a total design can be implemented.

[0010] In the electronic wristwatch of the present invention, it is preferable that the memory is a serial memory that outputs data in a serial manner. With this configuration, the number of connection terminals required for connection between the memory and the main unit including the display means can be reduced, and connection can be facilitated.

In the electronic wristwatch of the present invention, the memory is stored in a memory case having a protruding connection pin, and the main body having the display means is fitted with the connection pin to store the memory case. It is preferable that a storage portion is provided, and a rubber member for sealing the storage portion is provided on a lid portion that covers the storage portion. With this configuration, the waterproofness of the electronic wristwatch can be improved by sealing the memory case and the connection pin portion.

In the electronic wristwatch of the present invention, it is preferable that the memory case and the cover are integrated. In this case, the number of parts is reduced, and manufacturing costs such as assembly costs can be reduced.

In the electronic wristwatch according to the present invention, the memory is a nonvolatile and rewritable memory, provided with communication means with the outside, and stored in the memory by external instruction data and display screen data. It is preferable that the added and updated display screen data is made. With this configuration, the user writes the display screen data based on the new display design into the memory from the outside, so that the user can use his / her own electronic wrist watch as the display screen based on the new display design. Can be done easily.

[0014] In the electronic wristwatch of the present invention, the communication means may include:
It is preferable that instruction data and display screen data be received in a non-contact manner. This eliminates the need to expose and provide connection terminals and the like for data communication with the outside, so that the entire electronic wristwatch can be hermetically sealed, so that its airtightness is improved and its waterproof performance and the like are improved. be able to.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is an external perspective view showing an electronic wristwatch of Embodiment 1 and FIG. 2 is a perspective view of the electronic wristwatch of Embodiment 1 as viewed from the bottom. 3 is
FIG. 4 is a cross-sectional view illustrating a configuration of a memory unit used in the electronic wristwatch according to the first embodiment. FIG. 4 is a block diagram illustrating a configuration of the electronic wristwatch and the memory unit according to the first embodiment.

The electronic wristwatch 1 according to the first embodiment has an appearance as shown in FIG. 1 and has a dot matrix configuration for displaying display screens of various display designs.
A rectangular main body 2 having a CD panel 4, a power switch 5 and a display screen change switch 6 provided on a front surface thereof.
A belt 3 joined and integrated with the main body 2, a memory case 10 having a ROM 12 storing display screen data and the like displayed on the LCD panel 4, and
Removable memory unit 7 comprising lid 8 attached to recess 14 provided on the bottom surface of main body 2
And is composed of

The structure of the main body 2 is as shown in FIG.
A panel 4, an LCD driver 19 for controlling the display operation, a real-time clock (RTC) 18 as time measuring means for measuring time information, a crystal oscillator 17 for outputting a pulse signal of a predetermined frequency to the RTC 18, A power switch 5 and a display screen change switch 6;
And a micro-processing unit (MPU) 20 for controlling these devices, the time information measured by the RTC 18 is output to the MPU 20, and the MPU 20 stores the time information and the ROM.
12 based on the display screen data stored in
Display is performed on the LCD panel 4 via the CD driver 19.

The memory unit 7 has an appearance and a structure as shown in FIGS. 1, 2 and 3, and includes a ROM 12 in which display screen data is stored. Memory case 10 provided with connection terminal 11 for conducting
And a cover member 8 provided with a threaded portion 9 for attaching to the main body 2 on the side outer periphery thereof,
By mounting the memory unit 7 in the concave portion 14 at a portion where the lid member 8 comes into contact with the inner surface of the concave portion 14 provided on the bottom surface of the main body 2, the internal space in which the ROM 12 is stored is externally provided. Rubber packing 1 for sealing
3 are arranged.

The ROM 12 used in the present embodiment is a serial ROM for serially outputting data. Therefore, the connection terminal 11 between the ROM 12 and the main body 2 has two terminals, a negative terminal and a positive terminal. It is composed of a total of four power supply terminals, an output terminal for outputting data, and a clock terminal for transmitting a data clock.

In the following, the operation of the electronic wristwatch 1 according to the first embodiment will be described. A user selects a memory case 10 having a ROM 12 in which his / her desired display screen data is stored, and places it in a cover member 8. After mounting the memory unit 7 in the recess on the back surface of the main body 2 so that the connection terminal 11 and the terminal fitting portion 15 are fitted and connected, the user presses the power button 5 Then, the electronic wristwatch 1 is started.

Based on this input, the MPU 20
The display screen data of the display design to be displayed on the LCD panel 4 is read from the ROM 12.

Next, based on the time information data output from the RTC 18 and the display screen data read from the ROM 12, the MPU 20 displays a day information display A and a time information as a variable image information area as shown in FIG. A display screen including a display B and a character information display C as a fixed image information area is generated.
Output to CD driver 19.

The LCD driver 19 includes an MPU 20
Based on the output, each dot on the LCD panel 4 is controlled and display is performed as needed.

Further, in the first embodiment, as shown in FIG. 1, the MPU is so arranged that the time information display B moves in the left-right direction every predetermined time (in this embodiment, one second).
20.

In this way, a predetermined display design based on the display screen data stored in the ROM 12 is displayed.

When the user wants to change the display screen to a display screen of a different display design, the user presses the display screen change switch 6 to input.

Based on this input, the MPU 20
By reading other display screen data stored in the ROM 12 in the same manner as described above and displaying it on the LCD panel 4, the time can be displayed on a screen of a different display design.

When the user wants to display the time on a screen of a different display design that is not stored in the ROM 12, the user replaces the ROM 12 storing different display screen data with the internal memory case 10. Then, it can be easily implemented.

(Embodiment 2) FIG. 5 is an external perspective view showing an electronic wristwatch of Embodiment 2 and FIG. 6 is a perspective view of a detachable memory module 21 used in Embodiment 2. It is sectional drawing which shows a structure.

As shown in FIG. 5, the electronic wristwatch according to the second embodiment has a main body 2 'having substantially the same configuration as that of the first embodiment.
And the ROM 12 used in the first embodiment is included.
The main body 2 'is constituted by a memory module 21 which can be attached and detached from the side thereof.

The device configuration of the main body 2 ′ of the second embodiment is substantially the same as that of the main body 2 of the first embodiment. However, in the second embodiment, as shown in FIG. Le 2
1 is configured to be attached to and detached from the side direction, the shape of the connecting portion to the memory module 21 is different from that of the main body 2 of the first embodiment, and the second embodiment is different from the first embodiment.
The only difference is that the power switch 5 and the display screen change switch 6 provided in the above are omitted.

In the second embodiment, the memory module of the first embodiment is different from the memory module 10 of the first embodiment in that the memory case 10 and the lid 8 are separate.
Have a configuration in which they are integrated, and have a configuration as shown in FIGS.

These memory modules 21 are provided at their ends with pawls 24 for engaging with the main body 2 ', and a portion protruding toward the side into which the memory module 21 is slid is inserted into a recess provided in the main body 2'. The four connection terminals 2 similar to those in the first embodiment are provided on side surfaces of the protruding portions.
3 are provided so as to be electrically connected to the terminal receiving portions provided on the main body 2 ′.

A rubber packing 25 is provided around the protruding portion. When the memory module 21 is mounted on the main body 2 ', it comes into contact with the main body 2', The inside is sealed.

According to the second embodiment, the number of components constituting the memory module 21 can be reduced, and the memory module 21 can be attached and detached from the horizontal direction. -It is possible to carry out the exchange of the tool, and the exchange can be easily performed.

(Embodiment 3) FIG. 7 is an external perspective view showing an electronic wristwatch according to a third embodiment.

In the third embodiment, as shown in FIG. 7, a band module 26 having a configuration in which the memory module 21 of the second embodiment is integrated with the band 3 is used.

The band module 26 is configured such that the memory module 21 of the second embodiment is arranged on an L-shaped base 27, and the band 3 is mounted on the base 27. Are joined and integrated, and a claw portion 28 is provided on the upper surface of the base 27 so as to be fitted into a fitting recess provided on the bottom surface of the main body 2 '. 28 and the fitting recess, and the side portion of the main body 2 ′ is fitted with the protruding portion provided with the connection terminal 23, so that the main body 2 ′ is fitted to the band module 26. It is fixed.

By doing so, the display screen data stored in the ROM 12 disposed in the band module 26 can be unified with the design of the band and the like, and the electronic wristwatch can be used. Design can be enhanced.

Fourth Embodiment FIG. 8 is an external perspective view showing an electronic wristwatch according to a fourth embodiment.

In the electronic wristwatch of the fourth embodiment, as shown in FIG. 8, a ROM 12 is provided inside a band 3, and a hook for fitting the main body 2 '' is provided at a connection between the band 3 and the main body 2 ''. A connector 30 having a portion 31 at a side end portion was provided.
It is characterized in that a detachable belt module 29 is used.
And 3 are almost the same.

In the fourth embodiment, a connection terminal for connecting to the belt module 29 is provided in the recess 32 on the side of the main body 2 ", and a terminal receiving portion for connecting to this connection terminal is provided for the connector 30. I have.

In this manner, similarly to the third embodiment, the ROM 12 included in the belt module 29 is provided.
The display screen data stored in the LCD panel 4 is unified with the design of the band, etc.
And the design of the band can be unified, and the design of the electronic wristwatch can be enhanced. Even if the connection terminal is in a state in which the belt module 29 is removed, the concave portion of the main body 2 "is formed. Since the connection terminal is not exposed by being stored in the inside 32, the connection terminal does not bend or break.

(Embodiment 5) FIG. 9 is an external perspective view showing an electronic wristwatch according to Embodiment 5 of the present invention.

In the electronic wristwatch of the fifth embodiment, as shown in FIG. 9, the main body 46 is integrated with the band 3 and has a battery 3 and a rewritable EEPROM 47 therein.
5 can be attached to and removed from the belt module 34 in the vertical direction.

The main body 46 of the fifth embodiment is substantially the same as that of the second embodiment except that no battery 38 is provided inside the main body 46 and the upper surface of the belt module 34 The difference is that a terminal receiving portion for performing connection with the provided connection terminal 40 is provided at a predetermined position on the bottom surface of the main body 46.

Also, the belt module 34 of the fifth embodiment is used.
As shown in FIG. 9, the main body 46 is formed in a flat plate shape, and is fitted at a predetermined position on the bottom surface of the main body 46 at the center on both sides of the front surface so that the main body 46 can be mounted. A fitting claw portion 39 that fits into the concave portion and fixes the main body portion 46 is provided. Inside the battery 38, as described above, the battery 38 is sealed and stored by the lid member 37, and is rewritable. An EEPROM 47 is also stored. The anode and the cathode of the battery are connected to the power supply line of the connection terminal 40, respectively. The EEPROM 47 outputs data in the serial system used in the first embodiment and the like. , A data signal line and a clock signal line are connected to the predetermined connection terminals 40, respectively.

The battery 3 is provided on the upper surface of the base 35.
8 and a rubber packing 36 are provided so as to surround the connection terminal 40, and the inside of the rubber packing 36 is sealed by contacting the main body 46.

According to the fifth embodiment, since the main body 46 can be detached upward, the attachment and detachment of the main body 46 and the belt module 34 can be easily performed.

The memory included in the belt module 34 is made to be an EEPROM, so that the
A predetermined display screen data stored in the PROM 47 is transferred to the connection terminal 40 between the data signal line and the clock signal line.
Can be rewritten by removing the main body 46 and connecting it to a predetermined writing device.
When it is desired to change the display to another display design, the display screen data based on the new display design is written and updated in the same belt module 34 without changing the parts or the like. By changing the display screen, an electronic wristwatch having a new display design can be obtained.

(Embodiment 6) FIG. 10 is an external perspective view showing an electronic wristwatch and a writing apparatus according to a sixth embodiment, and FIG. 11 is a block diagram showing a configuration of the electronic wristwatch and the writing apparatus according to the sixth embodiment. It is.

As shown in FIG. 10, the electronic wristwatch 1 'of the sixth embodiment has almost the same appearance as that of the first embodiment, but the electronic wristwatch of the sixth embodiment has the same structure as that of the first embodiment. In this embodiment, the memory module 7 is detachable. In the sixth embodiment, these memories are used as the memories in the fifth embodiment.
As shown in FIG. 11, the EEPROM 47 used is fixedly provided.

In the electronic wristwatch 1 'of the sixth embodiment,
Inside these main units, a receiving coil 49 for non-contactly receiving transmission data modulated into a predetermined carrier by a writing device 41 described later, and a predetermined carrier received by the receiving coil 49 are demodulated. A demodulation unit 48 for outputting the data to the MPU 20 is provided.

The writing device 4 used in the sixth embodiment
1 has the appearance and configuration as shown in FIG. 10 and FIG. 11, and includes a transmission coil 44 for transmitting a predetermined carrier wave and transmission data inside the writing device 41 as described above. A modulating unit 50 for modulating the predetermined carrier;
And a communication unit 51 for communicating these transmission data with a control device such as a computer (not shown). The control device is connected to the control device via a communication cable 45.

The usage of the electronic wristwatch 1 'and the writing device 41 of the sixth embodiment will be described below. When the user normally uses the electronic wristwatch 1', the EEPR
The display screen data stored and stored in the OM 47 is MP
The information is read by U20, and a predetermined display design is displayed on the LCD panel 4 based on the time information from the RTC 18.

When the user wants to change to a display screen of a different display design which is not stored in the EEPROM 47, the display screen data of the desired display screen to be displayed on the EEPROM 47 is stored in the EEPROM 47.
Or write to the display screen data
It is necessary to erase the data and write and update the new display screen data. In order to write the new display screen data into the EEPROM 47, the user must
The electronic wristwatch 1 ′ according to the sixth embodiment is provided on the upper surface of the outer case 42 of the writing device 41.
Are disposed in the groove 43 having substantially the same shape.

Thereafter, the desired display screen data is output from the control device via the communication cable 45, and the display screen data is output from the communication section 51 to the modulation section 50. You.

In the modulating section 50, a predetermined carrier is modulated based on the display screen data from the communication section 51 and output from the transmitting coil 44.

The carrier wave output from the transmission coil 44 is received by a reception coil 49 disposed inside the main body of the electronic wristwatch 1 ′ disposed immediately above the transmission coil 44, and a predetermined display screen image is demodulated by the demodulation section 48. And is output to the MPU 20.

The display screen data from the demodulation unit 48 is:
New writing or updating is performed on the EEPROM 47 by the MPU 20.

The display screen data newly written or updated in this manner is read out by the MPU 20 at any time when the user inputs the display screen change switch 6, and displayed on the LCD panel 4. You.

According to the sixth embodiment, input of display screen data and the like can be performed in a non-contact manner without providing a connection terminal for inputting display screen data and the like from outside. Therefore, it is only necessary to place the main body of the electronic wristwatch 1 'on the writing device, writing can be easily performed, and the airtightness of the main body of the watch in which various electronic components and the like are present can be increased. Thus, the waterproof performance of the main body can be improved.

In the sixth embodiment, non-contact data transmission is performed using a predetermined carrier. However, the present invention is not limited to this, and other non-contact data may be used. Data transmission, for example, a transmission method using light such as infrared light may be used.

In the sixth embodiment, data transmission is performed by non-contact transmission. However, data transmission and the like may be performed using a normal connection terminal or the like. .

Although the embodiments have been described with reference to the drawings, the present invention is not limited to these embodiments, and changes and additions may be made without departing from the gist of the present invention. Needless to say, this is included in the present invention.

In the above embodiments, the dot matrix LCD panel 4 is used as the display means.
The present invention is not limited to this, and other dot matrix display panels, such as LCD and EL,
A display device such as plasma may be used.

[0068]

The present invention has the following effects.

(A) According to the first aspect of the present invention, by storing display screen data based on various display designs in the memory, a fixed information image area and a variable information image area based on the display design are formed. Since the display screen is displayed on a dot matrix display means capable of displaying an arbitrary display screen, it is only necessary to create display screen data based on the display design with a substantially common device configuration. , It is possible to develop and manufacture electronic wristwatches with different display designs, greatly shorten the design period and development period, and reduce the development cost,
Since the device configuration can be made substantially common to each model, the cost of the component devices can be kept low, and an electronic wrist watch can be manufactured at low cost.

(B) According to the second aspect of the present invention, a display screen based on a plurality of display designs is displayed on the display means, so that the owner can select a desired display screen at any time. Can be displayed.

(C) According to the third aspect of the present invention, an electronic wristwatch having a different display design can be easily obtained by replacing the memory.

(D) According to the invention of claim 4, the memory can be removed, and display screen data based on a new display design can be written and stored in the memory.
The user can easily make the electronic wristwatch of the display screen based on these new display designs without changing his or her own electronic wristwatch to a new memory.

(E) According to the fifth aspect of the present invention, it is not necessary to provide an individually removable memory, the number of parts can be reduced, the cost can be reduced, and the display design based on the band can be achieved. By storing display data in the memory, a total design can be implemented.

(F) According to the invention of claim 6, the number of connection terminals required for connection between the memory and the main body having display means can be reduced, and connection can be facilitated. become able to.

(G) According to the seventh aspect of the present invention, the waterproofness of the electronic wristwatch can be enhanced by sealing the memory case and the connection pin portion.

(H) According to the eighth aspect of the invention, the number of parts is reduced, and manufacturing costs such as assembly costs can be reduced.

(I) According to the ninth aspect of the present invention, by writing display screen data based on a new display design from the outside to the memory, the user can change his / her electronic wristwatch to these new display designs. Electronic wristwatch having a display screen based on the electronic watch.

(J) According to the tenth aspect of the present invention, there is no need to expose and provide connection terminals and the like for data communication with the outside, and the entire electronic wristwatch can be hermetically sealed. Thus, the waterproof performance and the like can be improved.

[0079]

[Brief description of the drawings]

FIG. 1 is a perspective view showing an electronic wristwatch according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the electronic wristwatch according to the first embodiment of the present invention when viewed from a bottom surface direction.

FIG. 3 is a cross-sectional view illustrating a configuration of a memory unit used in the electronic wristwatch according to the first embodiment of the present invention.

FIG. 4 is a block diagram illustrating a configuration of an electronic wristwatch and a memory unit according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing an electronic wristwatch according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a configuration of a memory unit used in Embodiment 2 of the present invention.

FIG. 7 is a perspective view illustrating an electronic wristwatch according to a third embodiment of the present invention.

FIG. 8 is a perspective view showing an electronic wristwatch according to a fourth embodiment of the present invention.

FIG. 9 is a perspective view showing an electronic wristwatch according to a fifth embodiment of the present invention.

FIG. 10 is a perspective view showing an electronic wristwatch and a writing device according to a sixth embodiment of the present invention.

FIG. 11 is a block diagram illustrating a configuration of an electronic wristwatch and a writing device according to a sixth embodiment of the present invention.

[Explanation of symbols]

1 Electronic wristwatch 1 'Electronic wristwatch 2 Main unit (hard case) 2' Main unit (hard case) 2 "Main unit (hard case) 3 Band 4 LCD panel (display means) 5 Power switch 6 Display screen change switch Reference Signs List 7 memory unit 8 lid 9 screw part 10 memory case 11 connection terminal 12 ROM (memory) 13 rubber packing 14 recess 15 terminal fitting part 16 battery 17 crystal oscillator 18 real-time clock (RTC; time measuring means) 19 LCD driver 20 Microprocessing unit (MPU;
Control means) 21 Memory module 22 Module case 23 Connection terminal 24 Claw 25 Rubber packing 26 Band module 27 Base base 28 Claw 29 Belt module 30 Connector 31 Claw 32 Depression 33 Connection terminal 34 Belt module 35 Base 36 Rubber packing 37 Lid material 38 Battery 39 Fitting claw part 40 Connection terminal 41 Writing device 42 External case 43 Groove part 44 Transmission coil 45 Communication cable 46 Main unit (hard case body) 47 EEPROM (memory) 48 Demodulation unit 49 Receiving coil 50 Modulation unit 51 Communication Part A Day information display (variable information image area) B Time information display (variable information image area) C Character information display (fixed information image area)

Claims (10)

[Claims] 1. A time measuring means for measuring time information, a dot matrix display means for displaying the measured time information, and a memory for storing at least one display screen data displayed on the display means. A display screen composed of the dot matrix is formed on the hard case body, and the dot matrix includes display information stored in the memory and variable information such as calendar information, time information, address information, and the like. An electronic wristwatch, wherein an image area and a fixed information image area expressing a design of a main body as a wristwatch are changed and displayed on a display screen as needed. 2. The display device according to claim 1, wherein a plurality of display screen data is stored in the memory, and input means for switching the display screen is provided, and the display screen can be switched by an input from the input means. Electronic wrist watch. 3. The electronic wristwatch according to claim 1, wherein the memory is non-volatile and detachable. 4. The electronic wristwatch according to claim 3, wherein the memory is rewritable. 5. The electronic wristwatch according to claim 3, wherein the memory is built in a band portion. 6. The electronic wristwatch according to claim 3, wherein the memory is a serial memory that outputs data in a serial manner. 7. A storage unit in which the memory is stored in a memory case having a protruding connection pin, and a main unit provided with the display means is provided with a storage unit fitted with the connection pin and storing the memory case. 7. The electronic wristwatch according to claim 3, wherein a rubber member for sealing the storage unit is provided on a cover unit that covers the storage unit. 8. The electronic wristwatch according to claim 7, wherein the memory case and the lid are integrated. 9. The display screen stored in the memory according to instruction data and display screen data from the outside, wherein the memory is a nonvolatile and rewritable memory, provided with a communication unit with the outside. Adding, deleting,
3. The electronic wristwatch according to claim 1, wherein the electronic wristwatch is updated. 10. The electronic wristwatch according to claim 9, wherein said communication means receives instruction data and display screen data in a non-contact manner.