Patent Publication Number: US-2005128877-A1

Title: Alarm electronic timepiece and conductive spring

Description:
TECHNICAL FIELD  
      The present invention relates to an electronic timepiece. Moreover, the present invention relates to a conductive spring which can be used in an alarm electronic timepiece, or the like.  
     BACKGROUND ART  
      Referring to  FIG. 11 , in a conventional first type of alarm electronic timepiece, a movement  700  comprises a main plate  702 . A dial  706  is arranged at the back side of the main plate  702 . In this movement  700 , a signal output pattern for outputting a piezobuzzer drive signal is provided on the surface of a circuit board  712 . A signal input pattern for inputting a piezobuzzer drive signal is provided on a piezobuzzer  742  arranged inside of a case back  740 . A conductive coiled spring  716  for electrically connecting the signal output pattern on the circuit board  712  and the signal input pattern on the piezobuzzer  742 , is provided in the movement  700 . One end of the conductive coiled spring  716  is arranged so as to contact with the signal output pattern on the surface of the circuit board  712 . The conductive coiled spring  716  is formed from a conductive material such as stainless steel. A guiding section  710  for guiding the conductive coiled spring  716  is provided in a battery frame  710 . A window section  714   a  for clearance from the conductive coiled spring  716  is provided in a switch spring  714 . The guiding section  710   c  includes a cylindrical part and a truncated conical part. The conductive coiled spring  716  is located by providing the guiding section  710   c.    
      Referring to  FIG. 12 , in a conventional second type of alarm electronic timepiece, in a movement  750 , a signal output pattern for outputting a piezobuzzer drive signal is provided on the back face of a circuit board  712 . A signal input pattern for inputting a piezobuzzer drive signal is provided on a piezobuzzer  742  arranged inside of a case back  740 . A conductive plate spring  770  for electrically connecting the signal output pattern on the circuit board  712  and the signal input pattern on the piezobuzzer  742 , is provided in the movement  750 . The conductive plate spring  770  comprises a base section  770   a  and a contact point spring section  770   b . The base section  770   a  is arranged between the circuit board  712  and a battery frame  760 . That is, the base section  770   a  is arranged so as to contact with the signal output pattern on the back face of the circuit board  712 . A tip of the contact point spring section  770   b  contacts with the signal input pattern. The conductive plate spring  770  is formed from a conductive material such as stainless steel. A guiding section  760   c  for guiding the conductive plate spring  770  is provided on the battery frame  760 . A window section  764   a  for clearance from the conductive plate spring  770  is provided in a switch spring  764 . The guiding section  760   c  includes a cylindrical part and a truncated conical part. The conductive plate spring  770  is located by providing the guiding section  760   c.    
      However, in a conventional first type of alarm electronic timepiece, if a movement comprising a conductive coiled spring for transferring a signal to a piezobuzzer is incorporated in an exterior case having a screw type (rotation installation type) case back, as shown by imaginary lines in  FIG. 11 , due to the rotation of the case back, the conductive coiled spring may fall, causing a defect in the electrical connection. Moreover, in a conventional second type of alarm electronic timepiece, if a movement comprising a stainless conductive plate spring for transferring a signal to a piezobuzzer is incorporated in an exterior case having a screw type case back, due to the tip of the conductive plate spring, the signal input pattern on the piezobuzzer may be scraped away. Furthermore, when a movement comprising a stainless conductive plate spring is fitted to an exterior case having a screw type case back, if the longitudinal direction of the conductive plate spring is not formed in the tangential direction of the circumference and the concentric circle of the case back, the conductive plate spring may be distorted, causing a defect in the electrical connection between the conductive plate spring and the signal input pattern.  
      Furthermore, when a movement comprising a stainless conductive plate spring is fitted to an exterior case having a screw type case back, the conductive plate spring may be buckled. Moreover, in a movement comprising a conductive coiled spring, if a conductive coiled spring is arranged at the center of a movement, there are problems in that it becomes difficult to mount a lithium battery of a diameter of about 20 mm into the movement, or the size and the thickness of the movement become large. If the tip of the conductive plate spring is lubricated with oil, the resistance between the conductive plate spring and the signal input pattern on the piezobuzzer is increased so that the sound pressure of the piezobuzzer may be decreased, or the consumption current may be increased.  
      Moreover, in a conventional electronic timepiece, an earthing coiled spring for earthing a movement to the case back is used. In this construction, if the movement is incorporated in an exterior case having a screw type case back, due to the rotation of the case back, the earthing coiled spring may fall, causing a defect in the electrical connection. Moreover, in a structure where an earthing plate spring is provided for the electrical connection between the movement and the case back, if the longitudinal direction of the earthing plate spring is not formed in the tangential direction of the circumference and the concentric circle of the case back, if the movement is incorporated in an exterior case having a screw type case back, the earthing plate spring may be distorted, causing a defect in the electrical connection between the earthing plate spring and the case back. Furthermore, in a conventional electronic timepiece, when a movement comprising a stainless earthing plate spring for earthing the movement to the case back is fitted into an exterior case having a screw type case back, the earthing plate spring may be buckling loaded in the longitudinal direction, causing buckling. Moreover, if an earthing coiled spring or an earthing plate spring is arranged at the center of a movement, there are problems in that it becomes difficult to mount a lithium battery of a diameter of about 20 mm into the movement, or the size and the thickness of the movement become large.  
      Moreover, in a conventional electronic timepiece, a mode conductive plate spring which transfers a signal for setting the mode to a mode setting signal inputting pattern of a circuit block, is used. In this construction, the thinner the mode conductive plate spring, the more likely that, when mode setting, the mode conductive plate spring will be distorted, causing a defect in the electrical connection between the mode conductive plate spring and the mode setting signal inputting pattern. On the other hand, in this construction, the thicker the mode conductive plate spring, the more likely that, when mode setting, due to the mode conductive plate spring, the mode setting signal inputting pattern may be scraped away. Therefore, it has been difficult to design a mode conductive plate spring in an appropriate size.  
     DISCLOSURE OF INVENTION  
      The construction of the present invention is such that, an electronic timepiece is constituted to notify by a piezobuzzer arranged inside of a case back of an exterior case, including: a buzzer signal transferring conductive spring for electrically connecting a signal output pattern on a circuit block and a signal input pattern on the piezobuzzer. Furthermore, the construction of the present invention is such that, an electronic timepiece being constituted to display a mode by a rotatable mode display wheel, including: a mode setting conductive spring for electrically connecting a signal input pattern on a circuit block and said mode display wheel which is constituted by a conductive material. Moreover, the construction of the present invention is such that, an electronic timepiece having an exterior case including a case back, including: an earth conductive spring for electrically connecting an electrode on one side of a power source and said case back which is formed from a conductive material. In the electronic timepiece of the present invention, the conductive spring is constituted to include one or more curved sections so as to be deformable, and the conductive spring is formed from a filler containing resin having a base resin of thermoplastic resin, and carbon filler mixed with this base resin.  
      In the electronic timepiece of the present invention, preferably the base resin is selected from a group consisting of: polystyrene, polyethylene terephthalate, polycarbonate, polyacetal (polyoxymethylene), polyamide, a modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, and polyether imide.  
      Furthermore, in the electronic timepiece of the present invention, preferably the carbon filler is selected from a group consisting of: a monolayer carbon nanotube, a multilayer carbon nanotube, a vapor grown carbon fiber, a nanografiber, a carbon nanohorn, a cup stack type carbon nanotube, a monolayer fullerene, a multilayer fullerene, and a mixture of any one of the carbon fillers doped with boron.  
      The conductive part of the present invention is constituted so as to be provided with a conductive spring which is constituted to include one or more curved sections so as to be deformable, and a housing which retains the conductive spring. In the conductive part of the present invention, the conductive spring is formed from a filler containing resin having a base resin of thermoplastic resin, and carbon filler mixed with this base resin.  
      In the conductive part of the present invention, preferably the base resin is selected from a group consisting of: polystyrene, polyethylene terephthalate, polycarbonate, polyacetal (polyoxymethylene), polyamide, a modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, and polyether imide.  
      Moreover, in the conductive part of the present invention, preferably the carbon filler is selected is selected from a group consisting of: a monolayer carbon nanotube, a multilayer carbon nanotube, a vapor grown carbon fiber, a nanografiber, a carbon nanohorn, a cup stack type carbon nanotube, monolayer fullerene, multilayer fullerene, and a mixture of any one of the carbon fillers doped with boron.  
      In the electronic timepiece of the present invention, the conductive spring is not buckled, the other parts are not damaged, and the conducting performance is stable. Moreover, the conductive spring of the present invention is not buckled, the other parts are not damaged, and it has a reliable conducting performance. Furthermore, in the conductive part of the present invention, the conductive spring is not buckled, the other parts are not damaged, and the conducting performance is stable. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a plan view showing a schematic configuration of a movement seen from the obverse side, in an embodiment of the present invention (some components are omitted in  FIG. 1 ).  
       FIG. 2  is a schematic fragmentary sectional view showing a part from a second motor to a second hand, in the embodiment of the present invention.  
       FIG. 3  is a schematic fragmentary sectional view showing a part from a minute motor to a minute hand, in the embodiment of the present invention.  
       FIG. 4  is a schematic fragmentary sectional view showing a part from an hour motor to an hour hand, in the embodiment of the present invention.  
       FIG. 5  is a schematic fragmentary sectional view showing a part of a hand setting stem, a mode conductive spring, and a switch contact point, in the embodiment of the present invention.  
       FIG. 6  is a schematic fragmentary sectional view showing a conducting structure of a circuit board and a piezobuzzer, in the embodiment of the present invention.  
       FIG. 7  is a schematic fragmentary sectional view showing a conducting structure of a circuit board and a mode display wheel, in the embodiment of the present invention.  
       FIG. 8  is a plan view showing a schematic configuration of a movement seen from the back side, in the embodiment of the present invention (some components are omitted in  FIG. 8 ).  
       FIG. 9  is a plan view showing a schematic configuration of a complete timepiece (an exterior case with the movement incorporated therein), in the embodiment of the present invention.  
       FIG. 10  is a schematic sectional view showing a structure of a conductive part in the embodiment of the present invention.  
       FIG. 11  is a schematic fragmentary sectional view showing a conducting structure using a coiled spring, in a conventional alarm electronic timepiece.  
       FIG. 12  is a schematic fragmentary sectional view showing a conducting structure using a plate spring, in a conventional alarm electronic timepiece. 
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION  
     (1) First Embodiment  
      First is a description of an electronic timepiece of an embodiment of the present invention. The embodiment of the present invention is an analog electronic timepiece.  
      (1-1) Structure of an Electronic Timepiece of Present Invention  
      Referring to  FIG. 1  to  FIG. 4 , in the embodiment of the present invention, a movement (machine body)  100  of the analog electronic timepiece is provided a main plate  102  constituting a substrate of the movement. A hand setting stem  110  is rotatably built into a hand setting stem guiding bole of the main plate  102 . A dial  104  (denoted by imaginary lines in  FIG. 2 ) is attached to the movement  100 . The movement  100  is provided with a switching spring  166  which determines the position in the axial direction of the hand setting stem  110 . On the “obverse side” of the movement  100 , a battery  120 , a circuit block  116 , an hour motor  210 , an hour display wheel train  220 , a minute motor  240 , a minute display wheel train  250 , a second motor  270 , a second display wheel train  280 , and the like are arranged. The main plate  102 , a wheel train bridge  112 , and a second bridge  114  constitute support members.  
      The configuration is such that rotation of the hour motor  210  cause rotation of the hour display wheel train  220  so that an hour hand  230  can display the “hour” of the present time. Moreover, the configuration is such that rotation of the minute motor  240  cause rotation of the minute display wheel train  250  so that the minute hand  260  can display the “minute” of the present time. Furthermore, the configuration is such that rotation of the second motor  270  cause rotation of the second display wheel train  280  so that the second hand  290  can display the “second” of the present time.  
      An IC  118  and a quartz resonator  122  are installed in the circuit block  116 . The circuit block  116  is fixed with respect to the main plate  102  and the wheel train bridge  112  by a switch spring  162  through an insulating plate  160 . The switching spring  166  is integrally formed with the switch spring  162 . The battery  120  constitutes the power source of the analog electronic timepiece. A rechargeable secondary battery or a rechargeable capacitor may be also used for the power source of the analog electronic timepiece. The quartz resonator  122  constitutes the oscillation source of the analog electronic timepiece. It oscillates for example at 32,768 Hertz.  
      Referring to  FIG. 1  and  FIG. 2 , a second motor  270  includes a second coil block  272 , a second stator  274 , and a second rotor  276 . When the second coil block  272  inputs a second motor drive signal, the second stator  274  is magnetized to rotate the second rotor  276 . The second rotor  276  is configured for example so that it rotates 180 degrees per second. The second rotor  276  includes an upper-shaft section  276   a , a lower-shaft section  276   b , a pinion section  276   c , and a rotor magnet  276   d . The upper-shaft section  276   a , the lower-shaft section  276   b , and the pinion section  276   c  are formed from a metal such as carbon steel.  
      The configuration is such that, based on rotation of the second rotor  276 , a second wheel  284  rotates through rotation of a second transfer wheel  282 . The second transfer wheel  282  includes an upper-shaft section  282   a , a lower-shaft section  282   b , a pinion section  282   c , and a gear wheel section  282 . The pinion section  276   c  is configured so that it meshes with the gear wheel section  282   d . The upper-shaft section  282   a , the lower-shaft section  282   b , and the pinion section  282   c  are formed from a metal such as carbon steel. The gear wheel section  282   d  is formed from a metal such as brass. The second wheel  284  is configured for example so that it rotates once per minute. The second wheel  284  includes an upper-shaft  284   a , a bead section  284   b , and a gear wheel section  284   d . The pinion section  282   c  is configured so that it meshes with the gear wheel section  284   d . The upper-shaft section  284   a  and the bead section  284   b  are formed from a metal such as carbon steel. The gear wheel sections  284   d  is formed from a metal such as brass.  
      The second hand  290  is attached to the second wheel  284 . The second hand  290  constitutes a second display member. The second display wheel train  220  includes the second transfer wheel  282  and the second wheel  284 . The second rotor  276  and the second transfer wheel  282  are rotatably supported with respect to the main plate  102  and the wheel train bridge  112 . The second wheel  284  is rotatably supported with respect a center pipe  126  provided on the second bridge  114  and the wheel train bridge  112 . That is, the upper-shaft section  276   a  of the second rotor  276 , the upper-shaft section  282   a  of the second transfer wheel  282 , and the upper-shaft section  284   a  of the second wheel  284  are rotatably supported with respect to the wheel train bridge  112 . Moreover, the lower-shaft section  276   b  of the second rotor  276  and the lower-shaft section  282   b  of the second transfer wheel  282  are rotatably supported with respect to the main plate  102 . A bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  276   a  of the second rotor  276 , a bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  282   a  of the second transfer wheel  282 , and a bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  284   a  of the second wheel  284 , are lubricated with lubricating oil. A bearing of the main plate  102  which rotatably supports the lower-shaft section  276   b  of the second rotor  276 , and a bearing of the main plate  102  which rotatably supports the lower-shaft section  282   b  of the second transfer wheel  282 , are lubricated with lubricating oil. For this lubricating oil, it is preferable to use precision instrument oil, and it is particularly preferable to use so-called chronometer oil. Examples of such chronometer oil include “Moebius Synt-A-Lube 9010 (trademark)” available from MOEBIUS Co, Ltd.  
      In order to increase the retention capacity of the lubricating oil, it is preferable to provide the respective bearings of the wheel train bridge  112  and the respective bearings of the main plate  102 , with sump sections of cone, cylindrical, or truncated cone shape. If the sump section is provided, the lubricating oil can be effectively prevented from spreading by the surface tension of the oil. The main plate  102  and the wheel train bridge  112  are formed from a metal such as brass.  
      Referring to  FIG. 1  to  FIG. 4 , a battery negative terminal  170  is attached in the main plate  102 . The battery negative terminal  170  electrically connects a negative electrode of the battery  120  and a negative input section Vss of an IC  118 , through the negative pattern of the circuit block  116 . A battery clamp  320  is incorporated in a switch spring  162 . An insulating plate  352  for insulating the negative electrode of the battery  120  from the switch spring  162  is arranged between the battery  120  and the battery clamp  320 . The insulating plate  352  is formed from a plastic sheet such as polyimide. A battery frame  310  for locating the battery  120  is fixed with respect to the main plate  102 . The battery frame  310  is formed from a plastic such as polycarbonate. The battery  120  is fixed with respect to the main plate  102  by the battery clamp  320 . The battery clamp  320  and the switch spring  162  electrically connect a positive electrode of the battery  120  and a positive electrode inputting section Vss of an IC  118 , via a positive electrode pattern on the circuit block  116 . The main plate  102  is electrically connected to the positive electrode of the battery  120  via the battery clamp  320  and/or the switch spring  162 .  
      Referring to  FIG. 1  and  FIG. 3 , a minute motor  240  includes a minute coil block  242 , a minute stator  244 , and a minute rotor  246 . When the minute coil block  242  inputs a minute motor drive signal, the minute stator  244  is magnetized to rotate the minute rotor  246 . The minute rotor  246  is configured for example so that it rotates 180 degrees per 20 seconds. The minute rotor  246  includes an upper-shaft section  246   a , a lower-shaft section  246   b , a pinion section  246   c , and a rotor magnet  246   d . The upper-shaft section  246   a , the lower-shaft section  246   b , and the pinion section  246   c  are formed from a metal such as carbon steel.  
      The configuration is such that, based on rotation of the minute rotor  246  a first minute transfer wheel  252  rotates, and based on rotation of the first minute transfer wheel  252  a minute wheel  256  rotates through rotation of a second minute transfer wheel  254 . The first minute transfer wheel  252  includes an upper-shaft section  252   a , a lower-shaft section  252   b , a pinion section  252   c , and a gear wheel section  252   d . The pinion section  246   c  is configured so that it meshes with the gear wheel section  252   d . The upper-shaft section  252   a , the lower-shaft section  252   b , and the pinion section  252   c  are formed from a metal such as carbon steel. The gear wheel section  252   d  is formed from a metal such as brass. The second minute transfer wheel  254  includes an upper-shaft section  254   a , a lower-shaft section  254   b , a pinion section  254   c , and a gear wheel section  254   d . The pinion section  254   c  is configured so that it meshes with the gear wheel section  254   d . The upper-shaft section  254   a , the lower-shaft section  254   b , and the pinion section  254   c  are formed from a metal such as carbon steel. The gear wheel section  254   d  is formed from a metal such as brass. The minute wheel  256  includes a cylindrical section  256   a  and a gear wheel section  256   d . The pinion section  254   c  is configured so that it meshes with the gear wheel section  256   d . The cylindrical section  256   a  is formed from a metal such as carbon steel. The gear wheel sections  256   d  is formed from a metal such as brass.  
      The minute wheel  256  is configured so that it rotates once per hour. The minute hand  260  is attached to the minute wheel  256 . The center of rotation of the minute wheel  256  is the same as the center of rotation of the second wheel  284 . The minute hand  260  constitutes a minute display member. The minute display wheel train  250  includes the first minute transfer wheel  252 , the second minute transfer wheel  254 , and the minute wheel  256 . The minute rotor  246 , the first minute transfer wheel  252 , and the second minute transfer wheel  254  are rotatably supported with respect to the main plate  102  and the wheel train bridge  112 . The minute wheel  256  is rotatably supported and contacts with a periphery of a center pipe  126  provided on the second bridge  114 . That is, the upper-shaft section  246   a  of the minute rotor  246 , the upper-shaft section  252   a  of the first minute transfer wheel  252 , and the upper-shaft section  254   a  of the second minute transfer wheel  254  are rotatably supported with respect to the wheel train bridge  112 . Moreover, the lower-shaft section  246   b  of the minute rotor  246 , the lower-shaft section  252   b  of the first minute transfer wheel  252 , and the lower-shaft section  254   b  of the second minute transfer wheel  254  are rotatably supported with respect to the main plate  102 .  
      A bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  246   a  of the minute rotor  246 , a bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  252   a  of the first minute transfer wheel  252 , and a bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  254   a  of the second minute transfer wheel  254 , are lubricated with lubricating oil. A bearing of the lower-shaft section  246   b  of the minute rotor  246 , a bearing of the main plate  102  which rotatably supports the lower-shaft section  252   b  of the first minute transfer wheel  252 , and a bearing of the main plate  102  which rotatably supports the lower-shaft section  254   b  of the second minute transfer wheel  254 , are lubricated with lubricating oil. For this lubricating oil, it is preferable to use precision instrument oil, and it is particularly preferable to use so-called chronometer oil. In order to increase the retention capacity of the lubricating oil, it is preferable to provide the respective bearings of the wheel train bridge  112  and the respective bearings of the main plate  102 , with sump sections of cone, cylindrical, or truncated cone shape.  
      Referring to  FIG. 1  and  FIG. 4 , an hour motor  210  includes an hour coil block  212 , an hour stator  214 , and an hour rotor  216 . When the hour coil block  212  inputs an hour motor drive signal, the hour stator  214  is magnetized to rotate the hour rotor  216 . The hour rotor  216  is configured for example so that it rotates 180 degrees per 20 minutes. The hour rotor  216  includes an upper-shaft section  216   a , a lower-shaft section  216   b , a pinion section  216   c , and a rotor magnet  216   d . The upper-shaft section  216   a , the lower-shaft section  216   b , and the pinion section  216   c  are formed from a metal such as brass.  
      The configuration is such that, based on rotation of the hour rotor  216  a first hour transfer wheel  222  rotates, and based on rotation of the first hour transfer wheel  222  an hour wheel  226  rotates through rotation of a second hour transfer wheel  224 . The first hour transfer wheel  222  includes an upper-shaft section  222   a , a lower-shaft section  222   b , a pinion section  222   c , and a gear wheel section  222   d . The pinion section  216   c  is configured so that it meshes with the gear wheel section  222   d  The upper-shaft section  222   a , the lower-shaft section  222   b , and the pinion section  222   c  are formed from a metal such as carbon steel. The gear wheel section  222   d  is formed from a metal such as brass. The second hour transfer wheel  224  includes an upper-shaft section  224   a , a lower-shaft section  224   b , a pinion section  224   c , and a gear wheel section  224   d . The pinion section  222   c  is configured so that it meshes with the gear wheel section  224   d . The upper-shaft section  224   a , the lower-shaft section  224   b , and the pinion section  224   c  are formed from a metal such as carbon steel. The gear wheel section  224   d  is formed from a metal such as brass. The hour wheel  226  includes a cylindrical section  226   a  and a gear wheel section  226   d . The pinion section  224   c  is configured so that it meshes with the gear wheel section  226   d . The hour wheel  226  is formed from a metal such as brass.  
      The hour wheel  226  is configured so that it rotates once per 12 hours. The hour hand  230  is attached to the hour wheel  226 . The center of rotation of the hour wheel  226  is the same as the center of rotation of the minute wheel  256 . Therefore, the center of rotation of the hour wheel  226 , the center of rotation of the minute wheel  256 , and the center of rotation of the second wheel  284  are the same. The hour hand  230  constitutes an hour display member. The hour display wheel train  220  includes the first hour transfer wheel  222 , the second hour transfer wheel  224 , and the hour wheel  226 . The hour rotor  216 , the first hour transfer wheel  222 , and the second hour transfer wheel  224  are rotatably supported with respect to the main plate  102  and the wheel train bridge  112 . The hour wheel  226  is rotatably supported and contacts with a periphery of the minute wheel  256 . That is, the upper-shaft section  216   a  of the hour rotor  216 , the upper-shaft section  222   a  of the first hour transfer wheel  222 , and the upper-shaft section  224   a  of the second hour transfer wheel  224  are rotatably supported with respect to the wheel train bridge  112 . Moreover, the lower-shaft section  216   b  of the hour rotor  216 , the lower-shaft section  222   b  of the first hour transfer wheel  222 , and the lower-shaft section  224   b  of the second hour transfer wheel  224  are rotatably supported with respect to the main plate  102 .  
      A bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  216   a  of the hour rotor  216 , a bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  222   a  of the first hour transfer wheel  222 , and a bearing of the wheel train bridge  112  which rotatably supports the upper-shaft section  224   a  of the second hour transfer wheel  224 , are lubricated with lubricating oil. A bearing of the lower-shaft section  216   b  of the hour rotor  216 , a bearing of the main plate  102  which rotatably supports the lower-shaft section  222   b  of the first hour transfer wheel  222 , and a bearing of the main plate  102  which rotatably supports the lower-shaft section  224   b  of the second hour transfer wheel  224 , are lubricated with lubricating oil. For this lubricating oil, it is preferable to use precision instrument oil, and it is particularly preferable to use a so-called chronometer oil. In order to increase the retention capacity of the lubricating oil, it is preferable to provide the respective bearings of the wheel train bridge  112  and the respective bearings of the main plate  102 , with sump sections of cone, cylindrical, or truncated cone shape.  
      A mode display wheel  180  is rotatably constituted with respect to the main plate  102 . The mode display wheel  180  is formed from a conductive material such as brass. The mode display wheel  180  is electrically connected to a positive electrode of the battery  120  via a battery clamp  320  and/or a switch spring  162 .  
      Referring to  FIG. 5 ,  FIG. 7  and  FIG. 8 , the construction is such that, when the hand setting stem  110  is arranged on a first step, the mode display wheel  180  can be rotated by rotating the hand setting stem  110 . The position of the mode display wheel  180  is located by a locating jumper spring  376 . On the surface on the side having a dial  104  of the mode display wheel  180 , characters denoting modes such as “AL”, “OFF”, “SET”, “TIME”, “INI”, “AUX” and the like are provided. The construction is such that, when the hand setting stem  110  is arranged on the first step, by rotating the hand setting stem  110 , the mode display wheel  180  is rotated so that a character denoting a mode can be seen from a window arranged on the dial  104 . “AL” denotes a mode to buzz an alarm. “OFF” denotes a mode not to buzz the alarm. “SET” denotes a mode to set a time to buzz an alarm. “TIME” denotes a mode to display a present time. “INI” denotes a mode to initialize the contents of an IC counter. “AUX” denotes a mode of other additional functions, for example, chronograph and the like.  
      A rotation restricting section  102   t  (for example, rotation restricting pin) for restricting the rotation of the mode display wheel  180  is provided on the main plate  102 . The construction is such that, a locating section provided on the circumference of the mode display wheel  180  is contacted with the rotation restricting section  102   t  so as to restrict the rotation of the mode display wheel  180 .  
      The hand setting stem  110  includes a tip shaft section  110   a , a correcting wheel mating part  110   b , a bead section  110   c , and a guiding shaft  110   d . The tip shaft section  110   a  and the guiding shaft  110   d  are rotatably built in with respect to the main plate  102 . A hand setting stem locating section  162   g  of a switch spring  162  is arranged so that it contacts with the bead section  110   c . A correcting wheel  380  is arranged so that a teeth section meshes with the teeth section of the mode display wheel  180 . The construction is such that, when the hand setting stem  110  is arranged on a first step, the correcting wheel mating part  110   b  of the hand setting stem  110  fits to a central hole of the correcting wheel  380  and the hand setting stem  110  is rotated so as to integrally rotate the correcting wheel  380 . By rotating the correcting wheel  380 , the mode display wheel  180  can be rotated. The construction is such that, when the hand setting stem  110  is arranged on a zero step, the correcting wheel mating part  110   b  of the hand setting stem  110  does not fit to the central hole of the correcting wheel  380 , even if the hand setting stem  110  is rotated, so as not to rotate the correcting wheel  380 .  
      The correcting wheel  380  is preferably formed from a plastic such as polycarbonate. The construction is such that, when the hand setting stem  110  is arranged on a first step and the hand setting stem  110  is rotated, so that the mode display wheel  180  is rotated by the rotation of the correcting wheel  380 , and a locating section provided on the circumference of the mode display wheel  180  is contacted with the rotation restricting section  102   t , the central hole of the correcting wheel  380  and the correcting wheel mating part  110  of the hand setting stem  110  slip. Therefore, when the hand setting stem  110  is arranged on the first step and the locating section provided on the circumference of the mode display wheel  180  is contacted with the rotation restricting section  102   t , even if the hand setting stern  110  is further rotated, the correcting wheel  380 , the mode display wheel  180  and the hand setting stem  110  will not damaged.  
      On the switch spring  162 , four switch terminal sections  162   a  to  162   d  are provided. Push buttons  382   a  to  382   d  are provided so as to correspond to the four switch terminal sections  162   a  to  162   d . The construction is such that, by pressing the push buttons  382   a  to  382   d , the switch terminal sections  162   a  to  162   d  are electrically connected to the switch pattern on the circuit block  116  so as to perform predetermined operations. As described above, the battery clamp  320  and the switch spring  162  are electrically connected to the positive electrode of the battery  120 . Therefore, the construction is such that, when the switch terminal sections  162   a  to  162   d  are electrically connected to the switch pattern on the circuit block  116 , the switch pattern on the circuit block  116  is electrically connected to the positive electrode of the battery  120 . The switch terminal section  162   a  and the push button  382   a  are arranged approximately on the two o&#39;clock side of the movement. The switch terminal section  162   b  and the push button  382   b  are arranged approximately on the four o&#39;clock side of the movement. The switch terminal section  162   c  and the push button  382   c  are arranged approximately on the eight o&#39;clock side of the movement. The switch terminal section  162   d  and the push button  382   d  are arranged approximately on the ten o&#39;clock side of the movement.  
      The configuration is such that, based on the oscillation of a quartz resonator  212 , a frequency dividing circuit divides an output signal from an oscillation circuit. The configuration is such that, based on the output signal from the frequency dividing circuit, an hour motor driving circuit outputs a motor drive signal which drives the hour motor  210 , to the hour motor  210 . The configuration is such that, based on the output signal from the frequency dividing circuit, a minute motor driving circuit outputs a motor drive signal which drives the minute motor  240 , to the minute motor  240 . The configuration is such that, based on the output signal from the frequency dividing circuit, a second motor driving circuit outputs a motor drive signal which drives the second motor  270 , to the second motor  270 . In a normal time display mode, the configuration is such that the hour motor driving circuit outputs a motor drive signal which drives the hour motor  210 , to the hour motor  210 , the minute motor driving circuit outputs a motor drive signal which drives the minute motor  240 , to the minute motor  240 , and the second motor driving circuit outputs a motor drive signal which drives the second motor  270 , to the second motor  270 , in order to display a time to buzz an alarm by the hour hand  230 , the minute hand  260 , and the second hand  290 . An alarm time calculating circuit is configured to calculate the time to buzz the alarm, based on an output signal from the frequency dividing circuit.  
      In the alarm time setting mode, the constitution is such that, when a push button is pressed, the hour motor driving circuit outputs a motor drive signal which drives the hour motor  210 , to the hour motor  210 , and the minute motor driving circuit outputs a motor drive signal which drives the minute motor  240 , to the minute motor  240 , in order to display a time to buzz an alarm by the hour hand  230  and the minute hand  260 . In the alarm time setting mode, the constitution is such that, when the time has come to buzz the alarm, the piezobuzzer driving circuit outputs a piezobuzzer drive signal which makes a piezobuzzer  342  perform based on the output signal from the alarm time calculating circuit, to the piezobuzzer  342 .  
      The oscillation circuit, the frequency dividing circuit, the hour motor driving circuit, the minute motor driving circuit, the second motor driving circuit, the alarm time calculating circuit, and the piezobuzzer driving circuit are incorporated in an IC  118 . The IC  118  may be a PLA-IC having a built-in program to perform various types of operations. In the embodiment of the electronic timepiece of the present invention, external elements such as a resistor, a capacitor, a coil, a diode, a transistor may be used in addition to the IC  118  as necessary.  
      Referring to  FIG. 6 , a signal output pattern for outputting a piezobuzzer drive signal is provided on the surface of the circuit block  116 . A signal input pattern for inputting a piezobuzzer drive signal is provided on a piezobuzzer  342  arranged inside of a case back  340 . A buzzer conductive spring  316  for electrically connecting the signal output pattern on the circuit block  116  and the signal input pattern for inputting the piezobuzzer drive signal on the piezobuzzer  342 , is provided in the movement  100 . The buzzer conductive spring  316  is preferably constituted to include one or more curved sections so as to be deformable. The buzzer conductive spring  316  is preferably formed into a “v” shape, a “U” shape, an “Ω”shape, or the like. Or, the buzzer conductive spring  316  is preferably formed into a “v” shape having bend sections on both ends, a “U” shape having bend sections on both ends, an “Ω”shape having both ends opened, or the like. The buzzer conductive spring  316  preferably has a waveform shape including a convex curved section being convex outwards and a concave curved section being concave outwards. The buzzer conductive spring  316  is formed from a conductive material.  
      The constitution is such that at least one end of the buzzer conductive spring  316 , or at least a curved section close to one end, contacts with the signal output pattern. The constitution is such that a convex curved section being convex outwards in the middle of the buzzer conductive spring  316  contacts with the signal input pattern. On the part where the buzzer conductive spring  316  and the signal output pattern contact, a switch spring  162  is preferably arranged. A window section  162   a  for clearance from the buzzer conductive spring  316  is provided in the switch spring  162 . Due to this constitution, deflection of the circuit block  116  can be prevented so as to ensure the contact force of the buzzer conductive spring  316  and the signal output pattern. To the switch spring  162  on the part where the buzzer conductive spring  316  and the signal output pattern contact, a presser spring section for adding to the elastic force toward the buzzer conductive spring  316  may be provided. As a modified example, the configuration may be such that the end section of the buzzer conductive spring  316  is soldered to the signal output pattern.  
      A guiding section  310   c  for guiding the buzzer conductive spring  316  is provided in the battery frame  310 . A recessed section  310   d  for clearance from both ends of the buzzer conductive spring  316  is provided in the battery frame  310 . The guiding section  310   c  may be cylindrical, conical, truncated conical, or quadratic prism. The buzzer conductive spring  316  can be reliably located by providing the guiding section  310   c . The buzzer conductive spring  316  is formed from a filler containing resin having a base resin of thermoplastic resin, and carbon filler mixed with this base resin. This filler containing resin is a conductive material. Therefore, by forming the buzzer conductive spring  316  from a filler containing resin, the conductivity performance required for the buzzer conductive spring  316  can be ensured.  
      An earthing spring  322  for earthing the movement  100  to the case back is provided in the movement  100 . The earthing spring  322  is preferably constituted to include one or more curved sections so as to be deformable. The shape of the earthing spring  322  is preferably similar to the shape of the buzzer conductive spring  316  described above. The earthing spring  322  is formed from a conductive material. The earthing spring  322  is constituted so as to contact with the battery clamp  320 . Therefore, the earthing spring  322  is electrically connected to the positive electrode of the battery  120 . A guiding section  310   f  for guiding the earthing spring  322  is provided in the battery frame  310 . The guiding section  310   d  is preferably formed in a slender window shape. The earthing spring  322  can be reliably located by providing the guiding section  310   d . As a modified example, the configuration may be such that the end section of the earthing spring  322  is soldered to any one of the battery clamp  320 , the switch spring  162 , or the positive electrode pattern of the circuit block  116 . The earthing spring  322  is formed from a filler containing resin having a base resin of thermoplastic resin, and carbon filler mixed with this base resin. The filler containing resin is a conductive material. Therefore, by forming the earthing spring  322  from a filler containing resin, the conductivity performance required for the earthing spring  322  can be ensured.  
      The base resin used in the present invention is generally polystyrene, polyethylene terephthalate, polycarbonate, polyacetal (polyoxymethylene), polyamide, modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, or polyether imide. That is, in the present invention, the base resin is preferably made of a so-called general-purpose engineering plastic or a so-called super engineering plastic. In the present invention, a general-purpose engineering plastic or a super engineering plastic other than the above can also be used for the base resin. It is preferable that the base resin used for the present invention is a thermoplastic resin. The carbon filler used in the present invention is generally; a monolayer carbon nanotube, a multilayer carbon nanotube, a vapor grown carbon fiber, a nanografiber, a carbon nanohorn, a cup stack type carbon nanotube, a monolayer fullerene, a multilayer fullerene, or a mixture of any one of the aforementioned carbon fillers doped with boron. Preferably the carbon filler is contained as 0.2 to 60% by weight of the total weight of the filler containing resin. Or preferably the carbon filler is contained as 0.1 to 30% by volume of the total volume of the filler containing resin.  
      Preferably the monolayer carbon nanotube has a diameter of 0.4 to 2 μm, and an aspect ratio (length/diameter) of 10 to 1000, specifically an aspect ratio of 50 to 100. The monolayer carbon nanotube is formed in a hexagon shaped netlike having a cylindrical shape or a truncated-cone shape, and is a monolayer structure. The monolayer carbon nanotube can be obtained from Carbon Nanotechnologies Inc. (CNI) in the U.S.A. as “SWNT”.  
      Preferably the multilayer carbon nanotube has a diameter of 2 to 100 nm, and an aspect ratio of 10 to 1000, specifically an aspect ratio of 50 to 100. The multilayer carbon nanotube is formed in a hexagon shaped netlike having a cylindrical shape or a truncated-cone shape, and is a multilayer structure. The multilayer carbon nanotube can be obtained from NIKKISO as “MWNT”.  
      Such carbon nanotubes are described in “Carbon Nanotubes and Accelerated Electronic Applications” (“Nikkei Science” March, 2001 issue, pp 52-62) and “The Challenge of Nano Materials” (“Nikkei Mechanical” December, 2001 issue, pp 36-57) by P. G. Collins et. al., or the like. Moreover, the configuration and the manufacturing method of carbon fiber-containing resin composition has been disclosed for example in Japanese Unexamined Patent Application, First Publication No. 2001200096.  
      Preferably the vapor grown carbon fiber has a diameter of 50 to 200 nm, and an aspect ratio of 10 to 1000, specifically an aspect ratio of 50 to 100. The vapor grown carbon fiber is formed in a hexagon shaped netlike having a cylindrical shape or a truncated-cone shape, and is a multilayer structure. The vapor grown carbon fiber can be obtained from SHOWA DENKO as “VGCF (trademark)”. The vapor grown carbon fiber has been disclosed for example in Japanese Unexamined Patent Application, First Publication No. H05-321039, Japanese Unexamined Patent Application, First Publication No. H07-150419, and Japanese Examined Patent Application, Second Publication No. H03-61768.  
      Preferably the nanografiber has an outer diameter of 2 to 500 nm, and an aspect ratio of 10 to 1000, an aspect ratio of 50 to 100 being particularly preferable. The nanografiber has an almost solid cylindrical shape. The nanografiber can obtained from ISE ELECTRON/now changed to NORITAKE ITRON CORP.  
      Preferably the carbon nanohorn has a diameter of 2 to 500 nm, and an aspect ratio of 10 to 1000, an aspect ratio of 50 to 100 being particularly preferable. The carbon nanohorn has a cup shape being a hexagon shaped netlike.  
      Preferably the cup stack type carbon nanotube has a shape where the carbon nanohorn is laminated into a cup shape, and an aspect ratio of 10 to 1000, an aspect ratio of 50 to 100 being particularly preferable.  
      Fullerene is a molecule which uses a carbon cluster as a parent. The definition of CAS, is that it is a molecule being a closed globular shape with 20 or more carbon atoms respectively combined with adjacent three atoms. Monolayer fullerene has a football like shape. Preferably the monolayer fullerene has a diameter of 0.1 to 500 nm. Preferably the composition of the monolayer fullerene is C60 to C540, the monolayer fullerene is for example C60, C70, and C120. The diameter of C60 is about 0.7 nm. Multilayer fullerene has a telescopic shape with the monolayer fullerene mentioned above concentrically laminated. Preferably the multilayer fullerene has a diameter of 0.1 nm to 1000 nm, a diameter of 1 nm to 500 nm being particularly preferable. Preferably the multilayer fullerene has a composition of C60 to C540. Preferably the multilayer fullerene has a configuration with for example C70 arranged on the outside of C60, and C120 arranged further on the outside of C70. Such multilayer fullerene has been described for example in “The Abundant Generation of Onion Structured Fullerene and Application to Lubricants” (“Japan Society for Precision Engineering” vol.67, No.7, 2001) by Takahiro Kakiuchi et. al.  
      Furthermore, the aforementioned carbon filler may also be made with any of the carbon fillers (a monolayer carbon nanotube, a multilayer carbon nanotube, a vapor grown carbon fiber, a nanografiber, a carbon nanohorn, a cup stack mold carbon nanotube, a monolayer fullerene, or a multilayer fullerene) doped with boron. The method of doping the carbon filler with boron is disclosed in Japanese Unexamined Patent Application, First Publication No. 2001-200096 or the like. In the method disclosed in Japanese Unexamined Patent Application, First Publication No. 2001-200096, the carbon fiber and boron manufactured by the gaseous-phase method, are mixed by means of a Henschel mixer type mixer, and this mixture is heat-treated at about 2300° C. in a high-frequency induction furnace or the like. Then, the heat-treated mixture is ground by a grinder. Next, the base resin and the ground mixture are blended at a predetermined rate, and melting and kneading carried out by an extruder in order to manufacture a pellet.  
      Referring to  FIG. 7 , a mode signal input pattern for inputting a mode signal onto the back face of the circuit block  116  is provided. A mode conductive spring  370  for electrically connecting the signal input pattern on the circuit block  116  and the mode display wheel  180  is provided in the movement  100 . The mode conductive spring  370  is preferably constituted to include one or more curved sections so as to be deformable. The mode conductive spring  370  is preferably formed into a “v” shape, a “U” shape, an “Ω”shape, or the like. Or, the mode conductive spring  370  is preferably formed into a “v” shape having bend sections on both ends, a “U” shape having bend sections on both ends, an “Ω”shape having both ends opened, or the like. The mode conductive spring  370  preferably has a waveform shape including a convex curved section being convex outwards and a concave curved section being concave outwards. The mode conductive spring  370  is formed from a conductive material.  
      Both ends of the mode conductive spring  370  are fixed to the mode display wheel  180 . The constitution is such that a convex curved section being convex outwards in the middle of the mode conductive spring  370  contacts with the mode signal input pattern. On the part where the mode conductive spring  370  and the mode signal output pattern contact, a switch spring  162  is preferably arranged. Due to this constitution, deflection of the circuit block  116  can be prevented so as to ensure the contact force of the mode conductive spring  370  and the mode signal output pattern. In the circuit block  116 , “AL pattern” which receives a signal for setting a mode to buzz the alarm, “OFF pattern” which receives a signal for setting a mode not to buzz the alarm, “SET pattern” which receives a signal for setting a mode to set a time to buzz an alarm, “TIME pattern” which receives a signal for setting a mode to display a present time, “INI pattern” which receives a signal for setting a mode to initialize the contents of an IC counter, “AUX pattern” which receives a signal for setting a mode of other additional functions, for example, chronograph and the like, are provided.  
      The mode conductive spring  370  is formed from a filler containing resin having a base resin of thermoplastic resin, and carbon filler mixed with this base resin. This filler containing resin is a conductive material. Therefore, by forming the mode conductive spring  370  from a filler containing resin, the conductivity performance required for the mode conductive spring  370  can be ensured. The specification of this base resin and the carbon filler is similar to the buzzer conductive spring  316  described above. Since the mode conductive spring  370  is constituted to include one or more curved sections so as to be deformable, the mode conductive spring  370  is not distorted when mode setting. Moreover, since the mode conductive spring  370  is formed from a filler containing resin, the pattern for inputting a mode signal of the circuit block  116  is not scraped away by the mode conductive spring  370 . Due to the above constitution, the mode conductive spring  370  is electrically connected to the positive electrode of the battery  120  through the mode display wheel  180 , the main plate  102 , the battery clamp  320  and/or the switch spring  162 . The pattern for inputting a mode signal of the circuit block  116  is not electrically connected to the positive electrode of the battery  120  at normal times. The constitution is such that, if the mode conductive spring  370  contacts with the mode signal input pattern of the circuit block  116  so that the mode signal input pattern is electrically connected to the positive electrode of the battery  120 , then a signal for setting the mode is input to the IC  118 .  
      (1.2) Operation of Electronic Timepiece of the Present Invention  
      Next is a description of an operation of the electronic timepiece of the present invention. Referring to  FIG. 1  and  FIG. 5  to  FIG. 8 , a crown  110   b  is incorporated in the hand setting stem  110 . When the crown  110   b  is drawn out and the hand setting stem  110  is arranged at the first step, by rotating the hand setting stem  110 , the mode display wheel  180  can be rotated. The mode display wheel  180  is rotated so that “INT” is displayed in the window section of the dial. In this condition, a convex curved section being convex outwards in the middle of the mode conductive spring  370  contacts with the “INT pattern” of the circuit block  116 . Next, by pressing a push button  382   d  for 3 seconds or more, the contents of the IC counter is set to a condition enabling initializing. Next, by pressing the push button  382   a , the hour motor  210  is driven to adjust the hour hand  230  to the position of 12 o&#39;clock. Next, by pressing the push button  382   b , the minute motor  240  is driven to adjust the minute hand  260  to the position of 12 o&#39;clock. Next, by pressing the push button  382   c , the second motor  270  is driven to adjust the second hand  290  to the position of 12 o&#39;clock. Next, by pressing the push button  382   d  for 3 seconds or more, initialization of the contents of the IC counter is finished. In this condition, even if the hand setting stem  110  is moved to the zero step, no operation is performed.  
      When the hand setting stem  110  is arranged at the first step, by rotating the hand setting stem  110 , the mode display wheel  180  can be rotated. The mode display wheel  180  is rotated so that “TIME” is displayed in the window section of the dial. In this condition, the convex curved section being convex outwards in the middle of the mode conductive spring  370  contacts with the “TIME pattern” of the circuit block  116 . Next, by pressing the push button  382   d  for 3 seconds or more, the contents of the IC counter is set to a condition enabling display of the present time. Next, by pressing the push button  382   a , the hour motor  210  is driven to adjust the hour hand  230  to the position of “hour” of the present time. Next, by pressing the push button  382   b , the minute motor  240  is driven to adjust the minute hand  260  to the position of “minute” of the present time.  
      Next, by pressing the push button  382   c , the second motor  270  is driven to adjust the second hand  290  to the position of “second” of the present time. The constitution is such that, if the push button  382   c  is pressed for 3 seconds or more, the second hand  290  can be adjusted to the position of 12 o&#39;clock. Next, the push button  382   d  is pressed so that the present time is displayed by the hour hand  230 , the minute hand  260 , and the second hand  290 . At this time, the hour hand  230  is rotated from the adjusted position, and moved to the position between an hour scale and another hour scale, corresponding to “minute”. Moreover, the minute hand  260  is rotated from the adjusted position, and moved to the position between a minute scale and another minute scale, corresponding to “second”. In this condition, even if the hand setting stern  110  is moved to the zero step, no operation is performed. In this condition, the hour hand  230 , the minute hand  260 , and the second hand  290  continue to display the present time.  
      When the hand setting stem  110  is arranged at the first step, by rotating the hand setting stem  110 , the mode display wheel  180  can be rotated. The mode display wheel  180  is rotated so that “SET” is displayed in the window section of the dial. In this condition, the convex curved section being convex outwards in the middle of the mode conductive spring  370  contacts with the “SET pattern” of the circuit block  116 . Next, by pressing the push button  382   d  for 3 seconds or more, the condition is set for setting the time to buzz the alarm. Next, by pressing the push button  382   a , the hour motor  210  is driven to adjust the hour hand  230  to the position of “hour” in the time to buzz the alarm. Next, by pressing the push button  382   b , the minute motor  240  is driven to adjust the minute hand  260  to the position of “minute” in the time to buzz the alarm. Next, by pressing the push button  382   d  for 3 seconds or more, the setting the time to buzz the alarm is finished. In this condition, the mode display wheel  180  is rotated so that “AL” is displayed in the window section of the dial. In this condition, the convex curved section being convex outwards in the middle of the mode conductive spring  370  contacts with the “AL pattern” of the circuit block  116 . In this condition, the hour hand  230 , the minute hand  260 , and the second hand  290  display the present time. Next, the hand setting stern  110  is moved to the zero step. In the condition, when the time has come to buzz the alarm, the piezobuzzer driving circuit outputs a piezobuzzer drive signal for driving the piezobuzzer  342 , to the piezobuzzer  342 . As a result, the piezobuzzer  342  performs.  
      When it is not necessary to buzz the alarm, the hand setting stern  110  is drawn out to the first step, and the hand setting stem  110  is rotated and the mode display wheel  180  is rotated so that “OFF” is displayed in the window section of the dial. In this condition, the convex curved section being convex outwards in the middle of the mode conductive spring  370  contacts with the “OFF pattern” of the circuit block  116 . In this condition, the hour hand  230 , the minute hand  260 , and the second hand  290  display the present time. In this condition, even if the hand setting stem  110  is moved to the zero step, no operation is performed.  
      When the mode display wheel  180  is rotated so that “TIME” is displayed in the window section of the dial in order to adjust the hour hand  230 , the minute hand  260 , and the second hand  290  to the present time, and furthermore, the hand setting stem  110  is rotated so that “OFF” is displayed in the window section of the dial, the hour hand  230 , the minute hand  260 , and the second hand  290  display the present time. When the mode display wheel  180  is rotated so that “TIME” is displayed in the window section of the dial in order to adjust the hour hand  230 , the minute hand  260 , and the second hand  290  to the present time, and furthermore, the hand setting stem  110  is rotated and the mode display wheel  180  is rotated so that “AL” is displayed in the window section of the dial, the hour hand  230 , the minute hand  260 , and the second hand  290  display the present time.  
      When the hand setting stem  110  is arranged at the first step, by rotating the hand setting stem  110 , the mode display wheel  180  is rotated so that “AUX” is displayed in the window section of the dial. In this condition, the convex curved section being convex outwards in the middle of the mode conductive spring  370  contacts with the “AUX pattern” of the circuit block  116 . Next, by performing the predetermined operations, operations of other additional functions, for example, chronograph and the like, are started. After the operations of other additional functions are finished, the mode display wheel  180  is rotated so that “OFF” or “AL” is displayed in the window section of the dial. Then the hour hand  230 , the minute hand  260 , and the second hand  290  display the present time.  
     (2) Other Embodiments  
      In the above embodiment of the present invention, the description of the present invention is for an analog electronic timepiece. However, the present invention may be applied to a digital electronic timepiece, and may be applied to a composite display electronic timepiece including analog display structure and digital display structure. In the above embodiment of the present invention, the description of the present invention is for an electronic timepiece using a battery for a power source. However, the present invention may be applied to an electronic timepiece using a capacitor for a power source, and may be applied to an electronic timepiece using a solar battery for a power source. In the above embodiment of the present invention, the description of the present invention is for an electronic timepiece of a construction where a positive electrode of a battery is earthed to a case back. However, the present invention may be applied to an electronic timepiece of a construction where a negative electrode of the battery is earthed to the case back.  
      In the above embodiments of the present invention, generally the base resin is polystyrene, polyethylene terephthalate, polycarbonate, polyacetal (polyoxymethylene), polyamide, a modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, or polyether imide. However, other plastics, for example, a thermoplastic resin such as polysulfone, polyether sulphone, polyethylene, nylon 6, nylon 66, nylon 12, polypropylene, ABS plastic, or AS resin, can also be used as the base resin. Moreover, two or more kinds of the abovementioned thermoplastic resins may be mixed to use as the base resin. Furthermore, an additive (antioxidant, lubricant, plasticizer, stabilizer, bulking agent, solvent, or the like) may be blended with the base resin used in this invention.  
      In the above embodiment of the present invention, the description of the present invention is for a construction where filler containing resin without plating is used. However, the present invention may be applied to a construction where a molded filler containing resin is plated. That is, the conductive spring may be used after molding then plating. Types of plating are for example, gold plating (electroless gold plating), nickel plating (electroless nickel plating), and the like.  
      Next is a description of an embodiment of a conductive part of the present invention. Referring to  FIG. 10 , in the embodiment of the present invention, a conductive part  500  has a conductive spring  501 , a first housing  502 , and a second housing  503 . This conductive part  500  may be a component of a timepiece in the above embodiments. Moreover, the conductive part  500  may be a component of other apparatus not limited to a timepiece.  
      The conductive spring  501  is constituted to include one or more curved sections so as to be deformable, and the conductive spring  501  is formed from a filler containing resin having a base resin of thermoplastic resin, and carbon filler mixed with this base resin. For the base resin to form this conductive spring  501 , the base resin used for the buzzer conductive spring  316  in the above embodiments may be applied. For the carbon filler to fill in this base resin, the carbon filler in the above embodiments may be applied. Here, the conductive spring  501  is a conductive material.  
      The conductive spring  501  is preferably formed into a “v” shape, a “U” shape, an “Ω”shape, or the like. Or, the conductive spring  501  is preferably formed into a “v” shape having bend sections on both ends, a “U” shape having bend sections on both ends, an “Ω”shape having both ends opened, or the like. The conductive spring  501  is preferably formed into a waveform shape including a convex curved section being convex outwards and a concave curved section being concave outwards.  
      The first housing  502  and the second housing  503  are for retaining the conductive spring  501 . As shown in  FIG. 10 , the first housing  502  and the second housing  503  are jointed on the end section (or edge section) of the first housing. The first housing  502  may be conductive material or non conductive material. The second housing  503  is a conductive material. Or, only the surface (back face) of the second housing  503  may be a conductive material.  
      Moreover, a guiding section  502   b  for guiding the conductive spring  501  is provided in the first housing  502 . A recessed section  502   a  for clearance from both ends of the conductive spring  501  is provided in the first housing  502 . The guiding section  502   b  may be cylindrical, conical, truncated conical, or quadratic prism. The conductive spring  501  can be reliably located by providing the guiding section  502   b.    
      Furthermore, as shown in  FIG. 10 , the construction is such that the end section of the conductive spring  501  or the curved section near the end section of the conductive spring  501  contacts with the second housing  503 . Therefore, the conductive spring  501  and the second housing  503  are electrically connected.  
      Next is a description of the usage and the operation of the conductive part  500  of the above configuration. The conductive part  500  is mounted in a timepiece or other various apparatus (hereunder, apparatus). In this mounting operation, the conductive part  500  is installed so that a convex curved section being convex outwards in the middle of the conductive spring  501  is arranged near a pattern (first pattern)  510  for transferring signals (or for supplying power) in the apparatus. This first pattern may be formed, for example, on a piezoelectric element (buzzer), a case back, or other substrate.  
      Here, the first pattern is movable being linked with operations such as pressing a switch for example. Therefore, for example, by pressing the switch, the first pattern is moved to contact with the convex curved section of the conductive spring  501  so that the first pattern and the conductive spring  501  are electrically connected.  
      Moreover, in the above mounting operation, the conductive part  500  is installed so that the second housing  503  contacts and electrically connects with a pattern (second pattern)  520  for transferring signals (or for supplying power) in the apparatus. For example, the end section of the second housing  503  and the second pattern  520  are jointed by a conductive material  530  such as a solder.  
      Therefore, by pressing the switch, the first pattern  510  is electrically connected to the second pattern  520  through the conductive spring  501  and the second housing  503 . Therefore, the mounted conductive part  500  can open and close a signal transfer route (or a power supply route or the like) between the first pattern  510  and the second pattern  520 .  
      Since the conductive spring  501  in the conductive part  500  is formed from a filler containing resin, the conductive spring is not buckled, the other parts are not damaged, and the conducting performance is stable.  
      Next is a description of an example of experimental data showing that the buzzer conductive spring  316 , the mode conductive spring  370 , and the conductive spring  501  formed from a carbon filler containing resin, have conductivity in the above embodiments, with reference to TABLE 1. TABLE. 1 shows the conductive characteristic of polycarbonate resin (PC) or polybutyrene terephthalate resin (PBT) with a carbon filler of 3.5% or 5% by weight added, and polyamide resin 12 (PA12) with a carbon filler of 20% by weight added, that is a carbon filler containing resin. The characteristics of non-composite materials with carbon filler not added (that is, PC, PBT, PA12 itself) are shown as “BLANK” for comparison.  
      The experimental data shown in TABLE. 1 is measured according to the standard D257 of the American Society for Testing and Materials (ASTM). This standard D257 is a normal experimental method for measuring conductance and the like.  
      Here, the conductive material is defined such that the surface resistance (Ω/□) is in a range of 10 −3  to 10 6 , or the volume resistivity (Ω·cm) is in a range of  10   −3  to 10 6 , or both are satisfied.  
      As shown in TABLE. 1, the surface resistance (Ω/□) and the volume resistivity (Ω·cm) of the various resins with a carbon filler added were significantly decreased compared to the various resins with carbon filler not added (BLANK). That is, the various resins with a carbon filler added became conductive materials. Moreover, the surface resistance (Ω/□) and the volume resistivity (Ω·cm) of PC and PBT with a carbon filler of 5% by weight added were lower and the conductance was improved compared to PC and PBT with a carbon filler of 3.5% by weight added. Furthermore, the surface resistance (Ω/□) and the volume resistivity (Ω·cm) of PA12 with a carbon filler added were significantly decreased compared to PA12 with carbon filler not added (BLANK). That is, PA12 with a carbon filler added became a conductive material. From the above, it was found that the more carbon filler added, the more the conductance was improved. However, if the carbon filler added was too much, the resin became fragile.  
      Therefore, by using a resin with a carbon filler of 20% to 3.5% by weight added, it becomes possible to provide a buzzer conductive spring  316 , a mode conductive spring  370 , a conductive spring  501 , and the like which is not buckled, wherein the other parts are not damaged, and the conducting performance is stable.  
     INDUSTRIAL APPLICABILITY  
      In the electronic timepiece of the present invention, the conductive spring is not buckled, the other parts are not damaged, and the conducting performance is stable. The conductive spring of the present invention is not buckled, the other parts are not damaged, and it has a reliable conducting performance. In the conductive part of the present invention, the conductive spring is not buckled, the other parts are not damaged, and the conducting performance is stable.  
                                       TABLE 1                                      Method of       PC   PBT   PA12                                                         Item   measuring   Units   5 wt %   3.5 wt %   BLANK   5 wt %   3.5 wt %   BLANK   20 wt %   BLANK               Surface resistance   ASTM D-257   Ω/□   10 5     10 6     —   10 3     10 7     10 12     10 0     10 14         Volume   ASTM D-257   Ω · cm   10 2     10 5     10 17     10 1     10 2     10 14     10 0     10 14         resistance