CN101154765B - Electronic apparatus and timepiece - Google Patents

Abstract

According to the present invention, in an antenna device (30) of a wristwatch (100), a pair of external magnetic bodies (33, 33) installed at both ends of a core (31) effectively concentrates the magnetic flux of a standard radio wave. The concentrated magnetic flux is guided into the coil (32) wound on the iron core (31) through the screw (34) and the iron core (31) for magnetic connection to effectively generate induced electromotive force and improve the receiving accuracy of standard radio waves. A pair of external magnetic bodies (33, 33) shield the pointer shaft (1) and the unnecessary external magnetic force of the motor (M2, M2) used to drive the pointer to rotate, and greatly reduce the influence of the external magnetic force on the motor (M2), Make the pointer run correctly and improve the precision of the watch.

Description

Electronic instruments and electronic clocks

technical field

The present invention relates to an electronic instrument with radio wave receiving function and an electronic clock which corrects time according to standard radio wave.

Background technique

As one type of electronic equipment, there is known an electronic timepiece that receives standard radio waves including time information and automatically corrects the current time. In such electronic timepieces, an antenna device in which a coil is wound around an iron core made of amorphous metal, ferrite, etc. as a magnetic material is widely used as an antenna device for receiving standard radio waves.

On the other hand, in the case of a timepiece whose hands are driven by an electric motor, the accuracy of the timepiece is often reduced due to the influence of external magnetic force unnecessary for the control of the timepiece on the driving of the hands. Therefore, maintaining the accuracy of the timepiece is sought by providing a magnetic shield that blocks external magnetic force within the timepiece case. In order to maintain the accuracy of timepieces, such antimagnetic countermeasures are also necessary for electronic timepieces that drive hands and have the same structure as ordinary timepieces.

However, electronic clocks receive the standard radio waves containing time information, extract the time information from the radio waves, and display the correct time. Therefore, in order to block the external magnetic force, if the motor and other devices are covered with a magnetic shield, the standard radio waves will be received in the future. becomes difficult, and its reception performance may degrade.

Therefore, an invention has been proposed in the past. This invention covers devices such as a motor with a magnetic shielding plate. This prevents a decrease in reception performance (see, for example, Japanese Patent Application Laid-Open No. 2004-294258).

However, according to the invention described in Japanese Patent Application Laid-Open No. 2004-294258, since an opening is provided in the magnetic shielding plate, the structure in which the coil winding portion of the magnetic body of the antenna device is exposed from the opening is equivalent to covering the watch case with the magnetic shielding plate. Compared with the case where the coil winding part of the antenna device is covered with a magnetic shielding plate, although the receiving sensitivity is somewhat improved, the existence of the magnetic shielding plate limits the focusing of the magnetic flux to the antenna device. Such a receiving sensitivity improvement is hopeless.

Contents of the invention

The present invention was made in view of the above problems, and an object of the present invention is to provide an electronic device and an electronic timepiece that have an effect of shielding unnecessary external magnetic force and can improve the accuracy of radio wave reception.

The electronic equipment of the present invention is provided in the main body of the equipment: at least one motor M1-M3, an antenna device having a magnetic body and a coil wound on the magnetic body, wherein the magnetic body has a coil wound with the coil A winding portion and a coil non-winding portion protruding from both ends of the coil winding portion as portions where the coil is not wound, at least one of the coil non-winding portions has a function of shielding the motor from external magnetic force. A protrusion that concentrates the magnetic flux of the electric wave from the outside at the same time.

The electronic timepiece of the present invention includes: an analog pointer mechanism, motors M1 to M4 for driving the analog pointer mechanism, and an antenna device having an iron core made of a magnetic material and a coil wound on the iron core, wherein the antenna device An external magnetic body having a coupling portion magnetically coupled to an end portion of the core and a magnetism collecting portion concentrating a magnetic flux of an external radio wave while shielding the motor from an external magnetic force is provided.

Description of drawings

The accompanying drawings, which are incorporated herein and constitute a part of this specification, represent the present best mode of carrying out the invention, and the foregoing description together with the following best mode help explain the principles of the invention.

FIG. 1 is a front view showing Embodiment 1 of a wristwatch employing the electronic device of the present invention.

Fig. 2 is an exploded perspective view of the watch of Fig. 1 .

Fig. 3 is a cross-sectional view taken along line III-III in Fig. 1 .

Fig. 4 is a plan view showing an antenna device in the wristwatch of Fig. 1 .

Fig. 5 is a side view showing the antenna device of Fig. 4 .

Fig. 6 is a block diagram showing the functional configuration of the wristwatch of Fig. 1 .

7 is a plan view showing an antenna device according to Modification 1 of Embodiment 1 of the present invention.

Fig. 8A is a side view showing the antenna device of Fig. 7 .

FIG. 8B is a perspective view of the antenna device of FIG. 8A.

FIG. 9A is an explanatory diagram showing a modified example of the antenna device in FIG. 1 .

FIG. 9B is a perspective view of an antenna device according to a modified example of FIG. 9A .

Fig. 10 is a front view showing a wristwatch according to Embodiment 2 of the present invention.

Fig. 11 is a cross-sectional view taken along line XI-XI in Fig. 10 .

Fig. 12 is a plan view showing the antenna device in the wristwatch of Fig. 10 .

FIG. 13 is a plan view showing Modification 1 of the antenna device shown in FIG. 10 .

FIG. 14 is a plan view showing Modification 2 of the antenna device of FIG. 10 .

Detailed ways

Hereinafter, specific embodiments of the present invention will be described using the drawings. Like reference numerals designate like parts throughout the drawings.

Embodiment 1

As shown in FIGS. 1 and 3 , the wristwatch 100 has a device body 2 , and a strap B is attached to the upper and lower ends of the device body 2 , that is, at the 12 o'clock side end and the 6 o'clock side end.

In addition, a switch 3 for instructing execution of various functions of the wristwatch 100 is provided on the outer peripheral portion of the instrument body 2 .

As shown in FIGS. 1 to 3 , the instrument body 2 has a watch case 10 made of a metal cylindrical frame such as titanium or stainless steel as an upper seal that closes the upper opening of the watch case 10 with a seal 13 . The watch glass 12 of the component, the dial 21 arranged under the watch glass 12, is made of the same material as the watch case 10 and uses the O-ring 15 as the bottom cover of the lower closing member that closes the lower opening of the watch case 10 14.

The inside of the watch case 10 accommodates the antenna device 30 for receiving standard radio waves, the analog pointer mechanism 40, and the motors M1, M2, M3 (Fig. 4) that drive the analog pointer mechanism 40, and are connected to and control the antenna device 30. The printed circuit board of the reception control circuit part 600 of the analog pointer mechanism 40, the non-magnetic synthetic resin frame 20 arranged under the dial 21 in which these electronic parts are built, the frame case 11 for accommodating the frame 20, etc. . The frame shell 11 is also made of the same material as the frame 20 .

The analog pointer mechanism 40 has a pointer shaft 1 extending upward from a shaft hole formed in the center of the dial 2 , and hands 22 such as an hour hand and a minute hand attached to the pointer shaft 1 . The pointer 22 rotates above the dial by driving the motors M1 , M2 , M3 of the analog pointer mechanism 40 . In addition, the printed circuit board connected to the analog pointer mechanism 40, as shown in FIG. 6, in addition to the reception control circuit part 600, a control IC such as a CPU and an oscillation circuit 720 are used as a timer circuit for timing the current time. The circuit unit 700 serves as a circuit element. The reception control circuit unit 600 amplifies and detects the reception signal of the antenna device 30, and extracts the time code included in the standard radio wave. The control IC corrects the current time of the chronograph circuit based on the time code extracted from the receiving circuit, controls the analog pointer mechanism 40 to display the corrected current time, and performs processing such as operating the pointer 22 .

The structure of the antenna device 30, as shown in FIG. 1 to FIG. 5, especially FIG. A pair of outer magnetic bodies 33 each having one end attached to both ends of the iron core 31 forms a pair of substantially semicircular outer magnetic bodies 33 .

The core 31 has a coil winding portion 31 a around which the coil 32 is wound and a portion where the coil 32 is not wound. In addition, the iron core 31 further has coil non-wound portions 31b protruding from both ends of the coil wound portion 31a. The core 31 is formed, for example, as a laminated core obtained by laminating a plurality of thin-film magnetic materials made of magnetic materials such as ferrite, amorphous, and permalloy (registered trademark).

A pair of external magnetic bodies 33 respectively have a coupling portion 33b that is fixed on the frame 20 and is used as a screw 34 as a magnetic connection member to magnetically couple one end to the coil non-winding portion 31b of the core 31, and shields the motor from external magnetic force and enables The magnetism collecting part 33a where the magnetic flux of the radio wave from the outside concentrates. The outer magnetic bodies 33 of a pair of thin plates are made of the same magnetic material as the core 31 . In addition, two motors M2 and M3 ( FIG. 4 ) are arranged in the housing 20 below the pair of external magnetic bodies 33 .

In addition, between the pair of external magnetic bodies 33, above the motor M1, a thin plate made of a magnetic material having a magnetic permeability lower than that of the external magnetic bodies 33 is provided in a stable state on the upper part of the frame 20. Magnetic shielding plate 35. Due to the existence of the non-magnetic portion 20 a of the frame 20 , the pair of external magnetic bodies 33 realize magnetic separation in space without contacting each other by the non-magnetic portion 20 a of the frame 20 . In addition, a gap in the horizontal direction is provided between the pair of outer magnetic bodies 33 and the magnetic shielding plate 35 so that there is no mutual magnetic coupling, and the outer magnetic body 33 and the magnetic shielding plate 35 are also magnetically separated.

FIG. 6 is a block diagram showing an electronic circuit of the wrist watch 100 . According to the figure, the watch 100 has a CPU 101 , an input unit 200 , a display unit 300 , a ROM 400 , a RAM 500 , a reception control circuit unit 600 , a timer circuit unit 700 and an oscillation circuit unit 720 .

CPU 101 reads a program stored in ROM 400 at a predetermined timing or an operation signal input from input unit 200 and expands it in RAM 500 , and transmits instructions and data to each part constituting wristwatch 100 based on the program. Specifically, for example, the reception control circuit section 600 is controlled at every predetermined time to receive standard radio waves, and based on the received signal, the processing of correcting the current time data counted by the timer circuit section 700 and the timing of the current time by the clock circuit section 700 are performed. The current time counted by the circuit unit 700 is displayed on the display unit 300 and the like.

The input unit 200 includes a switch 3 for instructing execution of various functions of the wristwatch 100 , and when the switch 3 is operated, a corresponding operation signal is output to the CPU 101 .

The display unit 300 includes a dial 21 , an analog pointer mechanism 40 controlled by the CPU 101 , and the like, and displays the current time measured by the timekeeping circuit unit 700 .

ROM 400 stores system programs and application programs related to wristwatch 100, programs and data for realizing the present embodiment, and the like.

RAM 500 is used as a work area of CPU 101 , and temporarily stores programs and data read from ROM 400 , data processed by CPU 101 , and the like.

The reception control circuit unit 600 removes unnecessary frequency components from the reception signal of the antenna device 30 , extracts a predetermined frequency signal, converts it into an electrical signal corresponding to the frequency signal, and outputs it to the CPU 101 .

The timer circuit unit 700 counts the clock signal output from the oscillation circuit unit 720 to measure the current time, and outputs the current time data to the CPU 101 . The oscillation circuit unit 720 is a circuit that always outputs a clock signal of a constant frequency.

Next, the operation of the antenna device 30 of this embodiment will be described.

In the antenna device 30 , the external magnetic body 33 is magnetically coupled to the coil non-winding portion 31 b formed at both ends of the core 31 , and extends widely on both ends of the core 31 . Therefore, the external magnetic body 33 concentrates the magnetic flux of the standard radio wave, and the concentrated magnetic flux of the standard radio wave passes through the core 31 , and an induced electromotive force is generated in the coil 32 by passing the magnetic flux. Standard radio waves are received by detecting this induced electromotive force. On the other hand, since the external magnetic body 33 covers the surface side of the motors M2 and M3, the external magnetic body 33 functions as a magnetic shield, and the external magnetic body 33 shields the magnetic force from the outside, so that the external magnetic force hardly reaches the motors M2 and M3. Therefore, the influence of the external magnetic force on the motors M2 and M3 can be reduced.

Furthermore, since the magnetic shield 35 covers the surface side of the motor M1, the magnetic force from the outside can be shielded by the magnetic shield 35, and the external magnetic force hardly reaches the motor M1. Therefore, the influence of the external magnetic force on the motor M1 can be reduced.

According to the present embodiment as described above, the pair of external magnetic bodies 33 provided at both ends of the iron core 31 are well concentrated by attracting the magnetism of the standard radio wave, and the magnetic flux passing through the iron core 31 can be well captured. , so the receiving sensitivity and receiving accuracy of standard radio waves can be improved. In addition, the external magnetic body 33 shields the magnetic force from the outside, since the external magnetic force hardly reaches the motors M2, M3, so the influence of the external magnetic force on the motors M2, M3 can be reduced, and the accuracy of timekeeping can be improved.

In addition, since the magnetic shield 35 covers the motor M1 in the area not covered by the external magnetic body 33, the influence of external magnetic force on the motor M1 can be reduced, and the accuracy of timekeeping can be improved.

Therefore, the wristwatch 100 having the antenna device 30 has the effect of shielding unnecessary external magnetic force, improves the reception accuracy of standard radio waves, and maintains good watch accuracy.

Variation

Next, as a modified example of the first embodiment of the present invention, only the parts different from the first embodiment will be mainly described.

As shown in FIG. 7 , the frame 20 has motors M1 to M4 , an antenna device 50 and a magnetic shield 55 . The motors M1 to M4 are used to drive the analog pointer mechanism 40 .

The structure of the antenna device 50 includes a magnetic body 51 and a coil 52 wound around the magnetic body 51 as shown in FIGS. 7 , 8A, and 8B. The magnetic body 51 has a coil wound portion 51a around which the coil 52 is wound, and coil non-wound portions 51b which are portions not wound with the coil 52 and protrude from both ends of the coil wound portion 51a. The coil non-winding portion 51 b has a bunny-ear-shaped (made of the same material as the magnetic body 51 ) protruding portion 53 as a whole that concentrates the magnetic flux of radio waves from the outside. The protruding portion 53 on the left side is also inside the frame 20, and is made to shield the external magnetic force that affects the motor M4 disposed below it. The tip side of the protruding portion 53 is formed in a plate shape thinner than the coil winding portion 51a.

In addition, between the pair of protruding parts 53 , a substantially T-shaped thin plate-shaped magnetic shield 55 made of a magnetic material having a lower magnetic permeability than the protruding parts 53 is provided. Below the magnetic shielding plate 55 , the motors M1 to M3 are arranged in the frame 20 . Furthermore, between the pair of protruding portions 53 and the magnetic shielding plate 55 . A gap in the horizontal direction is provided to the extent that there is no mutual magnetic coupling, and the protruding portion 53 and the magnetic shielding plate 55 are magnetically separated.

Furthermore, the antenna device 50 is configured so that the protruding portion 53 of the magnetic body 51 appropriately concentrates the magnetic flux of the standard radio wave, and the magnetic flux of the standard radio wave concentrated by the protruding portion 53 passes through the coil winding portion 51a of the magnetic body 51. Passage of this magnetic flux generates an induced electromotive force in the coil 52 . Standard radio waves are received by detecting this induced electromotive force.

In particular, since the protruding portion 53 on the left as the coil non-winding portion 51b covers the surface side of the motor M4, the protruding portion 53 functions as a magnetic shield, and since the protruding portion 53 shields the magnetic force from the outside, it is difficult for the external magnetic force to reach the motor. M4. Therefore, the influence of the external magnetic force on the motor M4 can be reduced. Similarly, since the magnetic shield 55 covers the surface side of the motors M1 to M3, the magnetic force from the outside is shielded by the magnetic shield 55, so that the external magnetic force hardly reaches the motors M1 to M3. Therefore, the influence of the external magnetic force on the motors M1 to M3 can be reduced.

Using the antenna device 50 having such a configuration can improve the reception sensitivity and reception accuracy of standard radio waves. In addition, the protruding part 53 on the left and the magnetic shielding plate 55 shield the magnetic force from the outside, and the external magnetic force is difficult to reach the motors M4, M1-M3, so the influence of the external magnetic force on the motors M4, M1-M3 can be reduced, and the accuracy of the watch can be improved.

In addition, the shape of the antenna device according to the modified example of the first embodiment is not limited to the above-mentioned embodiment. For example, as shown in FIGS. 9A and 9B , an antenna device 60 having a substantially U-shaped magnetic body 61 and a coil 62 wound at the center of the magnetic body 61 may be used. As shown in FIG. 9A , the magnetic body 61 is formed by laminating a plurality of substantially U-shaped magnetic thin plates 6 . The plurality of magnetic thin plates 6 are formed such that both ends gradually become shorter as they go to the lower layer side where they are stacked, and the thickness of the protrusions 63 at both ends of the magnetic body 61 gradually becomes thinner toward the front end. The antenna device 60 having such a configuration can also improve the reception sensitivity and reception accuracy of standard radio waves.

Embodiment 2

Next, regarding Embodiment 2 of the present invention, the differences from Embodiment 1 will be mainly described.

As shown in FIGS. 10 and 11 , the wristwatch 200 has a watch body 2 , and a band B is attached to upper and lower ends of the watch body 2 .

As shown in FIG. 11, the watch main body 2 has a watch case 10 in a cylindrical frame as a watch case for closing the watch case.

The watch glass 12 of the upper closing member of the upper opening of 10, the text set under the watch glass 12

The dial 21 is the bottom cover 14 serving as a lower closing member for closing the lower opening of the watch case 10 .

The inside of the watch case 10 accommodates an antenna device 70 for receiving standard radio waves, an analog pointer mechanism 40, a motor M for driving the analog pointer mechanism 40, and a reception control device connected to these and controlling the antenna device 70 and the analog pointer mechanism 40 The circuit unit 600 and printed circuit boards of other elements described in the first embodiment, the rack 20 on which these electronic components are installed, the rack case 11 that accommodates the rack 20, and the like. Furthermore, a dial 21 is provided above the frame 20 . The housing 20 is a case for fixing the antenna device 70, the analog pointer mechanism 40, the motor M, etc. in the watch main body 2, and is formed of a non-magnetic material.

As shown in FIGS. 10 to 12 , the antenna device 70 has a core 71 as a magnetic body, a coil 72 wound on the core 71 , and substantially semicircular second coils formed independently at both ends of the core 71 . An external magnetic body 73 and a second external magnetic body 74 .

The core 71 has a coil wound portion 71 a around which the coil 72 is wound, and coil non-wound portions 71 b which are portions not wound with the coil 72 and protrude from both ends of the coil wound portion 71 a. The iron core 71 has the same shape as that of the iron core in Embodiment 1 and is made of the same material.

The roughly semicircular first outer magnetic body 73, which is composed of an arcuate portion 731 expanded into an arcuate shape and a string portion 732 mounted on both ends of the arcuate portion 731, has a semicircular shape in the center of the string portion 732. The central convex portion 73c of the central convex portion 73c is made to shield the external magnetic force that affects the motor M disposed below it. In addition, the first external magnetic body 73 is magnetically connected to the coil non-winding portion 71b at the left end of the core 71 at the position of the connection end 73b by a screw 75 as a magnetic connection member. Similarly, the substantially semicircular second outer magnetic body 74 composed of an arcuate portion 741 expanded into an arcuate shape and stringed portions 742 straddling the two ends of the arcuate portion 741 has a semicircle in the center of its stringed portion 742. The circular central concave portion 74c has a shape that receives a part of the central convex portion 73c of the first external magnetic body 73, and at the position of the connection end 73b, a screw 75 as a magnetic connection member is connected to the coil at the right end of the core 71. The winding portion 71b is magnetically connected. The first outer magnetic body 73 and the second outer magnetic body 74 are made of the same material as the outer magnetic body 33 of the first embodiment, have the same function, and have magnetism collecting parts 73a, 74a for concentrating the magnetic flux of the received radio wave. .

Also, due to the presence of the non-magnetic portion 20 a of the frame 20 , the first outer magnetic body 73 and the second outer magnetic body 74 are spatially and magnetically separated.

The antenna device 70 having such a configuration can also improve the reception sensitivity and reception accuracy of standard radio waves. In addition, the first external magnetic body 73 shields the magnetic force from the outside, since the external magnetic force is difficult to reach the motor M1, so the influence of the external magnetic force on the motor M1 can be reduced, and the accuracy of the watch can be improved. Therefore, the wristwatch 200 having the antenna device 70 has the effect of shielding unnecessary external magnetic force, improves the reception accuracy of standard radio waves, and maintains good watch accuracy.

Modification 2-1

Next, with regard to Modification 2-1 of Embodiment 2 in FIG. 12 of the present invention, only the parts different from Embodiment 2 will be mainly described.

As shown in FIG. 13 , motors M1 to M3 are arranged below the first outer magnetic body 73 in the frame 20 . In addition, a motor M4 is disposed below the second outer magnetic body 74 .

In this way, the first external magnetic body 73 and the second external magnetic body 74 of the antenna device 70 shield the magnetic force from the outside by sharing, and the external magnetic force is difficult to reach the plurality of motors M1-M4, so the impact of the external magnetic force on each motor M1-M4 can be reduced. influence, can improve the accuracy of the table.

Modification 2-2

Next, with regard to Modification 2-2 of the embodiment of the present invention, only the parts different from Modification 2-1 will be mainly described.

As shown in FIG. 14 , motors M1 to M4 and an antenna device 80 are provided on the rack 2 .

As shown in FIG. 14 , the antenna device 80 has a magnetic body 81 and a coil 82 wound around the magnetic body 81 . The magnetic body 81 has a coil wound portion 81a around which the coil 82 is wound, and coil non-wound portions 81b which are portions not wound with the coil 82 and protrude from both ends of the coil wound portion 81a. In addition, the magnetic body 81 has protrusions 83 and 84 in the shape of rabbit ears which are formed entirely of the coil non-winding portion 81b and concentrate the magnetic flux from the external radio wave. The large protrusion 83 covers the motors M1-M4 to shield the external magnetic force affecting the motors M1-M4. The magnetic body 81 and the protrusions 83 and 84 are made of the same material as that of the core 71 of Modification 2-1.

The antenna device 80 of this modified example can also improve the reception sensitivity and reception accuracy of standard radio waves. In addition, since the protruding portion 83 shields the magnetic force from the outside, it makes it difficult for the external magnetic force to reach the motors M1-M4, so the influence of the external magnetic force on the motors M1-M4 can be reduced, and the accuracy of the watch can be improved.

Hereinafter, the points of the embodiment and modifications will be described.

The structure and effect of embodiment of the present invention and modified example are summarized as follows:

As mentioned above, this embodiment is an electronic device including at least one electric motor and an antenna device having a magnetic body and a coil wound on the magnetic body in the main body of the device, wherein the magnetic body has a coil wound on the magnetic body. There is a coil winding part of the above-mentioned coil and a coil non-winding part protruding from both ends of the above-mentioned coil winding part as a part not wound with the above-mentioned coil, at least one of the above-mentioned non-coil winding parts has a A protruding part that shields the external magnetic force and concentrates the electromagnetic flux from the outside.

According to this embodiment, at least one of the non-coiled portions protruding from both ends of the coiled portion on which the coil is wound in the portion of the magnetic body of the antenna device included in the electronic device where the coil is not wound Since there is a protruding part that shields at least one motor of the electronic instrument from external magnetic force and concentrates the magnetic flux of the radio wave from the outside, the unnecessary external magnetic force is shielded by this protruding part, and it is difficult for the external magnetic force to reach the motor. It can reduce the influence of external magnetic force on the motor and improve the accuracy of the instrument. In addition, the protruding portion attracts and appropriately concentrates magnetic flux such as a standard radio wave, and captures the magnetic flux passing through the coil winding portion of the magnetic body satisfactorily, thereby improving the reception sensitivity and accuracy of the radio wave.

In this case, it is characterized in that the protruding portion is formed entirely of the coil non-winding portion.

Another embodiment is an electronic instrument having at least one electric motor and an antenna device having a core made of a magnetic material having two ends and a coil wound on the core in the main body of the instrument, wherein the core At least one end portion of the motor has an external magnetic body having a coupling portion magnetically coupled to the end portion, and a magnetism collecting portion that shields the motor from external magnetic force and concentrates magnetic flux of external radio waves.

According to this embodiment, the external magnetic body provided at the end of the core of the antenna device of the electronic device shields the motor of the electronic device from the external magnetic force and concentrates the magnetic flux of the radio wave from the outside. The body shields the unnecessary external magnetic force and makes it difficult for the external magnetic force to reach the motor, so the influence of the external magnetic force on the motor can be reduced, and the accuracy of the instrument can be improved. In addition, the external magnetic body moderately concentrates the magnetic flux by attracting standard radio waves, etc., and captures the magnetic flux passing through the iron core well, thereby improving the reception sensitivity and reception accuracy of radio waves.

In this case, it is characterized in that the outer magnetic body is formed separately from the end of the core. Furthermore, it is characterized in that it has a frame for fixing the motor and the antenna device in the instrument main body, and the external magnetic body is provided on the upper part of the frame.

This embodiment is characterized in that, when external magnetic bodies are attached to both end portions of the core, the frame has a non-magnetic portion that magnetically separates the two external magnetic bodies in space.

In this embodiment, it is characterized in that the above-mentioned instrument main body has a cylindrical frame for accommodating the above-mentioned rack, an upper closing member for closing the upper opening of the frame, and a lower closing member for closing the lower opening of the above-mentioned frame; The magnetic body is disposed between the motor and the upper closing member.

Another feature is that, in the coupling portion, the iron core and the external magnetic body are connected by a magnetic connection member.

It is characterized in that external magnetic bodies are provided at both ends of the core, and when the number of the one motor is large, the external magnetic bodies share and shield the corresponding electric motors from the outside.

Moreover, it is characterized in that it has another electric motor in addition to the above-mentioned electric motor, and further has a magnetic shield plate for shielding the above-mentioned other electric motor from magnetic force from the outside.

In addition, it is characterized in that when the outer magnetic bodies are provided at both ends of the core, in addition to the motor, another motor is provided between the two outer magnetic bodies, and the other motor is shielded from the outside. Magnetic shield.

Furthermore, one embodiment is an electronic timepiece having an analog pointer mechanism, a motor for driving the analog pointer mechanism, and an antenna device including an iron core made of a magnetic material and a coil wound on the iron core, wherein the above-mentioned The antenna device has an external magnetic body having a coupling portion magnetically coupled to an end portion of the iron core and a magnetism collecting portion that shields the motor from external magnetic force from the outside and concentrates magnetic flux of radio waves from the outside.

If this embodiment is used, the external magnetic body provided at the end of the iron core of the antenna device of the electronic timepiece shields the motor that drives the analog pointer mechanism of the electronic instrument from the external magnetic force, and the magnetic field of the radio wave from the outside is shielded. Through concentration, since the external magnetic body shields the unnecessary external magnetic force and makes it difficult for the external magnetic force to reach the motor, the influence of the external magnetic force on the motor can be reduced, and the instrument accuracy of the electronic clock can be improved. In addition, the external magnetic body attracts and appropriately concentrates magnetic flux such as standard radio waves, and satisfactorily captures the magnetic flux passing through the iron core, thereby improving the reception sensitivity and reception accuracy of the radio waves.

In addition, in the above embodiments, although non-magnetic materials are used to form the frame, the present invention is not limited to this point, and it can also be made to inlay and hoop the magnetic material part in the frame of non-magnetic material, or form A frame made of magnetic material and non-magnetic material can also use the magnetic material part as an external magnetic body.

In addition, in the above embodiments, an electronic wristwatch as an electronic timepiece was described as an example of an electronic device, but the present invention can be applied to any electronic device having a radio wave receiving function. For example, a mobile phone, a radio, a portable game machine, a digital record player, etc. are mentioned as an electronic device.

Various modifications can be made without departing from the broad spirit and scope of the present invention. The above-described embodiments and modifications are intended to illustrate the present invention, not to limit the present invention. The scope of protection of the present invention is not so much represented by the above-mentioned embodiments and modified examples, but rather represented by the appended claims, and various changes made within the scope of the claims of the present invention and the scope of their equivalents should be regarded as including within the scope of the present invention.

Claims (10)

1. an electronic instrument (100,200) possesses in apparatus subject (2): at least one motor (M1～M3) has magnetic (51,61,81) and is wound on the antenna assembly (50,60,80) of the coil (52,62,82) on this magnetic, it is characterized in that,

Above-mentioned magnetic has the coil coiling portion (51a, 61a, 81a) that is wound with above-mentioned coil and as not reeling the part of above-mentioned coil and respectively from the outstanding non-coiling of the coil portion (51b, 61b, 81b) in two ends of above-mentioned coil coiling portion,

At least one has and is covering above-mentioned at least one motor (M4), above-mentioned motor shielding is made the ledge (53,63,83,84) that produces induced electromotive force from the flux concentrating of the electric wave of the outside of above-mentioned apparatus subject and through above-mentioned coil coiling portion (51a) and at above-mentioned coil (52) in the outside magnetic force that the outside of above-mentioned apparatus subject is invaded in the non-coiling of above-mentioned each coil portion

Above-mentioned ledge forms by the non-coiling of above-mentioned coil portion is whole.

2. an electronic instrument (100,200); In apparatus subject (2), possess: at least one motor (M, M1～M4); Have the iron core (31,71) that constitutes by the magnetic material that both ends are arranged and be wound on the antenna assembly (30,70) of the coil (32,72) on this iron core, it is characterized in that

At least one end in the both ends of above-mentioned iron core possesses external magnetic gonosome (33; 73); This external magnetic gonosome (33; 73) have and the magnetic-coupled coupling part (33b in this at least one end; 73b) and covering above-mentioned at least one motor (M; M1-M4); Make from the flux concentrating of the electric wave of the outside of above-mentioned apparatus subject in the time of outside magnetic force that the shielding of above-mentioned motor is invaded from the outside of above-mentioned apparatus subject and be directed to above-mentioned coil (32) and produce (the 33a of collection magnetic portion of induced electromotive force at this coil (32); 73a)

The said external magnetic is individually formed with respect to above-mentioned at least one end in addition.

3. like the electronic instrument of claim 2 record, it is characterized in that,

Have above-mentioned motor and said antenna device be fixed on the frame (20) in the above-mentioned apparatus subject,

Has the said external magnetic on the top of above-mentioned frame.

4. like the electronic instrument of claim 3 record, it is characterized in that,

Both sides at the both ends of above-mentioned iron core have a said external magnetic (33,33 respectively; 73,73), on the top of above-mentioned frame and between a pair of said external magnetic, have and make above-mentioned pair of outer magnetic realize non magnetic (20a) of Magnetic Isolation each other non-contiguously.

5. like the electronic instrument of claim 3 record, it is characterized in that above-mentioned apparatus subject has:

The watch shell of the tubular of the above-mentioned frame of folding and unfolding (10),

Seal the watch crystal (12) of the upper opening of this watch shell, and

Seal the bottom (14) of the lower openings of above-mentioned watch shell;

The said external magnetic is configured between above-mentioned motor and the above-mentioned watch crystal.

6. like the electronic instrument of claim 2 record, it is characterized in that,

At above-mentioned coupling part, above-mentioned iron core is connected with magnetic connecting elements (34,75) with the said external magnetic.

7. like the electronic instrument of claim 3 record, it is characterized in that,

Both sides at the both ends of above-mentioned iron core have a said external magnetic (33,33 respectively; 73,73), and above-mentioned at least one motor (M1～M4) constitutes, and a pair of said external magnetic is shared and shield from the outside of the above-mentioned apparatus subject outside magnetic force to above-mentioned a plurality of motor intrusions by a plurality of motor.

8. like the electronic instrument of claim 7 record, it is characterized in that,

The motor (M1) that except above-mentioned a plurality of motor, also has other,

Also has the anti-magnetic sheet (35) that above-mentioned other motor is shielded outside magnetic force.

9. like the electronic instrument of claim 8 record, it is characterized in that,

Both sides at the both ends of above-mentioned iron core have a said external magnetic (33 respectively; 33); Between above-mentioned pair of outer magnetic, be provided with above-mentioned other motor (M1), also have the anti-magnetic sheet (35) of the outside magnetic force that above-mentioned other motor shielding is invaded from the outside of above-mentioned apparatus subject.

10. an electronic watch (100); Possess: simulated pointer mechanism (40), (M1～M4) has the iron core (31) that is made up of magnetic material and is wound on the antenna assembly (30) of the coil (32) on this iron core to drive at least one motor of this simulated pointer mechanism; It is characterized in that

At least one end in the both ends of above-mentioned iron core has external magnetic gonosome (33; 73); This external magnetic gonosome (33; 73) have and the magnetic-coupled coupling part (33b in this at least one end; 73b) and covering above-mentioned at least one motor (M1～M4); Make from the flux concentrating of the electric wave of the outside of above-mentioned apparatus subject in the time of outside magnetic force that the shielding of above-mentioned motor is invaded from the outside of above-mentioned apparatus subject and be directed to above-mentioned coil (32) and produce (the 33a of collection magnetic portion of induced electromotive force at this coil (32); 73a)

The said external magnetic is individually formed with respect to above-mentioned at least one end in addition.

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