JP2002311164A - Clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clock for fully securing magnetism resistance performance without increasing the size of the clock. SOLUTION: A partition section 14 is integrated to an annular drum member 11 that becomes the side wall section of a case 10 while the partition section 14 divides the inner space of the case 10 into front and rear sides, the drum member 11 and a lid member 12 for blocking the rear side opening of the drum member 11 are formed by a material having high permeability, and high permeability is given to a site for surrounding the drum member 11. In this case, the thickness dimension of the drum member 11 and the lid member 12 is set to a dimension that is sufficient for preventing the entry of a magnetic field, the drum member 11 and the lid member 12 themselves secure magnetism resistance performance, thus eliminating the need for separately providing the magnetism resistance member, and preventing the dimension of the entire clock 1 from increasing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timepiece having a structure in which a movement is covered by a case, and more particularly, to preventing electronic components and the like housed in a machine room in the case from malfunctioning due to the influence of an external magnetic field. A timepiece having a magnetic-resistant structure.

[0002]

2. Description of the Related Art Conventionally, as a portable timepiece such as a pocket watch or a wristwatch, a mechanical timepiece having a mechanical movement configured without including electronic components has been used. As such a mechanical timepiece, there is known an anti-magnetic timepiece provided with an anti-magnetic structure in order to prevent the entry of an external magnetic field which adversely affects the mechanical movement. Such an anti-magnetic structure generally has a double case structure. For example, in addition to the movement, the inside of the outer case, which is the exterior of the watch, has a magnetic-resistant ring that covers the periphery of the movement, a magnetic-resistant cover that covers the face of the movement on the dial side, and the back cover of the case and the movement. An interposed magnetically resistant inner cover is provided. These anti-magnetic parts, such as anti-magnetic ring, anti-magnetic cover and anti-magnetic inner cover, are made of a material having high magnetic permeability such as soft iron or permalloy, and have a certain thickness to prevent external magnetic fields from entering. It is provided with. It is to be noted that the anti-magnetic cover is commonly used as a dial. The anti-magnetic watch having the anti-magnetic structure as described above is carried by people who work in the vicinity of a strong magnetic source, for example, a doctor who handles an X-ray fluoroscope or the like, a member of a power plant, a radio technician, etc. Even when exposed to magnetism, the time can be accurately displayed.

[0003]

In a timepiece having the above-described anti-magnetic structure, in order to ensure the anti-magnetic performance of the timepiece, a magnetic-resistant ring, a magnetic-resistant cover and a magnetic-resistant inner cover formed of a material having a high magnetic permeability. In addition to the above, the thickness of the anti-magnetic member needs to be equal to or more than a predetermined size, and the thickness of the outer case provided on the outside of the anti-magnetic member adds to the size of the timepiece. In particular, multifunction watches that have functions other than the time display function, such as a chronograph with a time display function and a timekeeping function, have functions other than the time display function. If the performance is to be ensured, the above-mentioned problem of the enlargement becomes more remarkable. Also,
In order to provide anti-magnetic performance, anti-magnetic parts such as anti-magnetic ring, anti-magnetic cover and anti-magnetic inner cover are required.Therefore, the number of watch components increases, the number of assembling steps of the watch increases, and the production efficiency is hindered. There is also a problem in that the manufacturing cost of the device increases. Therefore, in such a timepiece, it is necessary to take some measures to ensure necessary and sufficient magnetic resistance with a structure as simple as possible.

[0004] On the other hand, today, as a timepiece, an electronically controlled mechanical timepiece using a generator driven by a mainspring and an electronic circuit operated by the power of the generator as a speed control means, or a quartz having a quartz movement A clock is used. If these electronically controlled mechanical watches and quartz watches are used in an environment where a strong magnetic field is generated, they will be adversely affected by the strong magnetic field. It is desirable that the mechanical timepiece and the quartz timepiece also have a magnetic-resistant structure, but if an electronically controlled mechanical timepiece and a quartz timepiece are provided with a magnetic-resistant structure, the same problem as that of the mechanical timepiece described above occurs.

[0005] It is an object of the present invention to provide a timepiece in which the anti-magnetic performance is sufficiently secured without increasing the size of the timepiece.

[0006]

According to the present invention, an annular body member serving as a side wall portion of a case and a partition portion for partitioning an internal space of the case into a front surface side and a back surface side are integrally formed. A timepiece provided with a lid member for closing an opening on the back side of the body member, wherein a machine room which is a space for accommodating a machine of the timepiece is formed between the partition portion and the lid member, The lid member is characterized in that at least a portion surrounding the machine chamber has high magnetic permeability. In the present invention as described above, when a material having sufficient rigidity as a structural material and having a high magnetic permeability is employed as a material for forming the trunk member and the lid member, the thickness of the trunk member and the lid member is reduced by a magnetic field. If it is set to a size sufficient to prevent the ingress of, the trunk member and the lid member itself,
Since the magnetic resistance is ensured, the size of the entire timepiece does not increase. On the other hand, as a material for forming the trunk member and the lid member, a material having sufficient rigidity as a structural material but not having a high magnetic permeability, for example, when a synthetic resin or the like is used, the surface of each of the trunk member and the lid member is used. Alternatively, a magnetically permeable surface material having high magnetic permeability may be provided inside, and the magnetically permeable surface material may be used to secure magnetic resistance. Here, as the anti-magnetic surface material, even if it is inappropriate as a structural material because it is too brittle or too soft to constitute the trunk member and the lid member, even if its thickness is small, it is sufficient. By adopting a material exhibiting high magnetic permeability, the magnetic resistance can be secured without increasing the size of the entire timepiece.

In the timepiece described above, a body integrally formed of a material having high magnetic permeability can be used as the body member. In this way, as the material having high magnetic permeability, there are many materials having sufficient rigidity as a structural material. Therefore, as described above, the thickness of the body member is set to prevent entry of a magnetic field. If the size is set to a sufficient size, the body member itself can ensure the anti-magnetic performance, so that the size of the entire timepiece does not increase. Further, even if the anti-magnetic performance of the body member is ensured, the number of components does not increase, and the workability in assembling the timepiece is not impaired at all. In addition, as a material having high magnetic permeability, SUS44
4. SUS (NAR FC-3), NAR192, RN
434LN-2, NAS430LM, SHOMAC, S
US (NAR-444M1) or other ferritic stainless steel, pure iron (SUY), METGLAS2605C0, M
ETGLAS2605SC, METGLAS2605S
-2 or the like, permalloy, etc. can be adopted.

In the above-mentioned timepiece, the body member may be formed by integrally molding a synthetic resin mixed with a powder of a high magnetic permeability material. In this way, the injection molding method can be employed in manufacturing the body member, and even when the body member has a complicated shape, it is possible to mass-produce the body member with excellent dimensional accuracy, and the manufacturing efficiency of the body member is reduced. Will be improved.

Further, when the body member is formed of a non-magnetic material, at least one of the front and back surfaces of the partition may be covered with a magnetically permeable member having high magnetic permeability. In this way, as described above, the thickness of the entire partition portion can be increased by adopting a material that exhibits sufficient high magnetic permeability even if the thickness is small, as described above. Therefore, the anti-magnetic performance is ensured.

When the body member is made of a non-magnetic material as described above, a magnetic-resistant surface material having a high magnetic permeability may be embedded in the partition. In this way, sufficient anti-magnetic performance is secured in the partition, and if a material having excellent tensile strength or rigidity is selected as a material forming the anti-magnetic surface material, the partition is reinforced, and the trunk member is Even if the thickness is small, sufficient rigidity will be secured,
From this point, the overall size of the timepiece does not increase.

Here, it is preferable that a synthetic resin is used as the non-magnetic material, and the partition portion in which the anti-magnetic surface material is embedded is formed by insert molding. In this way, as described above, sufficient anti-magnetic performance can be obtained by the anti-magnetic surface material,
Since the torso member is manufactured by insert molding, even a complicated shape can be molded with high precision, and the torso member can be easily manufactured even if the anti-magnetic surface material is embedded therein, and the torso member can be manufactured. Production efficiency is improved.

Further, in the above-mentioned timepiece, a partition portion for partitioning the inside of the machine room can be erected on the surface on the back side of the partition portion, and the partition portion has a high magnetic permeability. Is desirable. In particular, when the machine room is provided with a magnetic component that generates magnetism,
It is preferable that the partition part separates the magnetic component from other components. In this way, even if a magnetic component such as a motor or a generator that generates a magnetic field and an electronic component that is liable to malfunction due to the magnetic field or a train whose rotational speed tends to fluctuate when magnetized are in the same machine room, If the drive train and the wheel train are separated from the magnetic components by the partition, the magnetism generated by the magnetic components is cut off by the partition, making it difficult to reach the electronic components and the train wheel, causing malfunctions of the electronic components and fluctuations in the rotational speed of the train wheel. Is prevented, and the time display of the clock becomes more accurate.

Further, in the timepiece as described above, the partition portion is formed of a non-magnetic material, and the partition portion has a magnetically resistant surface material having a high magnetic permeability embedded therein. preferable. In this way, even if the material forming the partition does not have high magnetic permeability, the partition has sufficient anti-magnetic performance due to the anti-magnetic surface material, and the partition is used as a material for forming the partition. Aluminum alloy that can be molded by the die casting method, synthetic resin that can be molded by the injection molding method, etc. can be adopted, and even if the partition part is set up in the partition part, the body member can be easily manufactured. .

Here, it is preferable that the partition is made of a synthetic resin, and the magnetic-resistant surface material is insert-molded inside the partition so that the partition has magnetic resistance. In this way, as described above, the body member provided with the partitioning portion can be manufactured by the injection molding method, and even a body member having a complicated shape can be molded with high precision, and the partitioning portion can be formed. Even if a magnetic-resistant surface material is embedded in the inside, the body member can be easily manufactured, and the manufacturing efficiency of the body member is improved.

In the above-mentioned timepiece, it is preferable that the partition part also serves as a middle frame for fixing parts of the timepiece to the machine room. By doing so, it is not necessary to separately provide a middle frame on the watch, and the number of parts of the watch is reduced, so that the work of assembling the watch becomes easier,
Clock productivity is improved. Here, by appropriately setting the thickness dimension of the partition part, the middle frame for fixing the movement, which is a part of the timepiece, at a predetermined position in the thickness direction can be used also as the partition part. On the other hand, if a stepped portion is formed on the back surface of the partition portion and the diameter of the inner peripheral surface of the stepped portion is set according to the diameter of the movement that is a part of the timepiece, the movement can be positioned at a predetermined plane position. Can be used also as a partition.

Further, the above-mentioned timepiece has a plurality of hands attached to drive shafts provided at different positions, and at least one of these hands is used for functions other than the time display. What is provided can also be adopted. As described above, a multifunctional timepiece having functions other than the time display function, for example, a chronograph having a timekeeping function in addition to the time display function, the movement of the timepiece itself tends to be large, as described above. If the portion surrounding the machine room formed inside the case has a high magnetic permeability so that the anti-magnetic performance is ensured, further increase in the size of the timepiece can be prevented.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a timepiece 1 according to a first embodiment of the present invention. In FIG. 1, a timepiece 1 includes a dial 2 for displaying time and a date display window 3 for displaying a date. The dial 2 has a rotatable hour hand 5a and a minute hand 5b.
The current time is displayed by the second hand 5c and the second hand 5c. The display time of the time display unit can be corrected by rotating the crown 6.

The timepiece 1 has an hour hand 5a, a minute hand 5b and a second hand 5c.
And a case 10 provided with a machine room 16 for accommodating the movement 7. Here, the movement 7 is an electronically controlled mechanical timepiece that drives the rotor of a generator (not shown) with a mainspring, and controls the rotation speed of the generator rotor with an electronic circuit including a quartz oscillator. Further, the mainspring is automatically wound up by the rotation of a rotary weight (not shown).

As shown in FIG. 2, the case 10 includes an annular body member 11 serving as a side wall portion of the case 10,
A cover member 12 which is provided on the back side of the body member 11 so as to be able to close the opening on the back side of the body member 11 and a glass 13 provided so as to cover the dial 2 on the front side of the body member 11. . The body member 11 is integrally formed with a partition part 14 for partitioning an internal space of the case 10 into a front surface side and a back surface side and interconnecting an intermediate portion of the body member 11 in a thickness direction. Between the partition 14 and the glass 13, a display means storage chamber 15 for storing the hands 5a, 5b, 5c is formed. The dial 2 as a time display unit is integrally formed on the front side surface of the partition unit 14, whereby the dial as a member on which the dial 2 is formed is also used by the partition unit 14.

The aforementioned machine room 16 is formed between the partition 14 and the lid member 12, and the movement room 7 is provided in the machine room 16.
Is stored. A stepped portion 16A corresponding to the diameter of the movement 7 is formed on the rear surface of the partition portion 14. The stepped portion 16A is for fixing the movement 7 at a predetermined plane position of the timepiece 1. By forming the stepped portion 16A, the partitioning portion 14 also functions as a middle frame. I have.

Here, the body member 11 is integrally formed of a material having high magnetic permeability, and the partition portion 14 is also integrally formed. Like the body member 11, the cover member 12 is integrally formed of a material having high magnetic permeability. As a result, the body member 11 and the lid member 12 have a high magnetic permeability as a whole, and a portion surrounding the machine room 16 also has a high magnetic permeability. The magnetic field is prevented from entering.

Examples of the material having high magnetic permeability for forming the body member 11 and the lid member 12 include SUS444, SUS444
(NAR FC-3), NAR192, RN434LN
-2, NAS430LM, SHOMAC, SUS (NA
R-444M1) and other ferritic stainless steels, pure iron (SUY), METGLAS2605C0, METGL
Amorphous materials such as AS2605SC and METGLAS2605S-2, permalloy, and the like can be used.

According to the first embodiment, the following effects can be obtained. That is, the partition part 14 that partitions the internal space of the case 10 into the front side and the back side is integrally formed with the annular body member 11 serving as the side wall part of the case 10, and the opening on the back side of the body member 11 is closed. Providing the lid member 12, forming each of the trunk member 11 and the lid member 12 with a material having high magnetic permeability,
Since the portion surrounding the machine room 16 has a high magnetic permeability, the thickness of the body member 11 and the lid member 12 is simply set to a size sufficient to prevent the entry of a magnetic field, and the magnetic resistance of the case 10 is reduced. The performance can be ensured, and it is not necessary to provide a dimensional allowance for separately providing a magnetically resistant member in the case 10, and it is possible to prevent the overall size of the timepiece 1 from becoming large.

As a material having a high magnetic permeability for forming the body member 11, SU which can be used as a rigid structural material can be used.
Since S444 and the like can be adopted, rigidity is secured in the partition part 14 by employing a structural material having high magnetic permeability, the partition part 14 reinforces the body member 11, and the rigidity of the case 10 can be easily improved. On the other hand, when it is not necessary to improve the rigidity of the case 10, the thickness of the body member 11 can be reduced, and from this point, it is possible to prevent the overall size of the timepiece 1 from increasing.

Further, the partition 14 is provided with a stepped portion 16A so that the movement 7 is fixed at a predetermined plane position by such a partition 14, and the partition 14 fixes the position of the movement 7. As a result, it is not necessary to separately provide a middle frame in the timepiece 1, the number of parts of the timepiece 1 is reduced, the work of assembling the timepiece 1 can be easily performed, and the productivity of the timepiece 1 is improved. be able to.

Further, the dial 2 as a time display unit is integrally formed on the front surface of the partition unit 14, and the dial, which is the member on which the dial 2 is to be formed, is also used by the partition unit 14. In addition, it is not necessary to separately provide a dial, and an increase in the thickness of the entire case 10 can be suppressed. And dial 2
Since the partitioning portion 14 is integrally formed with the body member 11, there is no problem that the displayed number of the dial 2 is shifted with respect to the case 10. No gap is formed between them, so that the parting edge of the dial peripheral edge seen in the conventional timepiece is eliminated, and the dial 2 and the body member 11 have the same texture and color tone. Can be improved.

FIG. 3 shows a second embodiment of the present invention. In the second embodiment, the material of the body member 11 in the first embodiment is a non-magnetic material. That is, the body member 11 is made of a non-magnetic material such as a synthetic resin and an aluminum alloy, and the partition part 14 is integrally formed. Torso 1
1, and the partition portion 14 itself does not have high magnetic permeability. Then, at least one of the front and back surfaces of the partition 14 (here, the partition
Both the front and back surfaces of 14) are covered with anti-magnetic members 17a and 17b having high magnetic permeability. Accordingly, the body member 11 and the lid member 12 have a high magnetic permeability at a portion surrounding the machine room 16, so that a magnetic field is prevented from entering from one of the outside and the inside of the machine room 16 to the other. It has become.

The anti-magnetic members 17a and 17b are mounted in the machine room in the case 10.
On the front side and the back side of the partition part 14 which is a part surrounding the 16,
Each is attached with double-sided tape. Here, as the anti-magnetic members 17a and 17b, a surface material made of an amorphous metal, particularly, a cobalt-based amorphous metal is preferably used.
Co-4Fe-1Ni-14B-15Si can be adopted.

In the second embodiment, the same operations and effects as those of the first embodiment can be obtained, and the following effects can be added. That is, the trunk member 11
As a non-magnetic material for forming the body member, a synthetic resin or an aluminum alloy can be adopted. Therefore, when the body member 11 is manufactured, if a synthetic resin is used, an injection molding method can be adopted, and the body member can be used.
Even if the shape of the body 11 is complicated, the body 11 with excellent dimensional accuracy can be mass-produced, and the manufacturing efficiency of the body 11 can be improved. On the other hand, if an aluminum alloy or the like that can adopt the die casting method is adopted in manufacturing the body member 11, the body member 11 with excellent dimensional accuracy can be mass-produced by the die casting method even if the body member 11 has a complicated shape. This makes it possible to improve the production efficiency of the body member 11 as in the case of manufacturing the body member 11 made of synthetic resin.

FIG. 4 shows a third embodiment of the present invention. In the third embodiment, the anti-magnetic members 17a and 17b provided on the surface of the partition 14 in the second embodiment are replaced with anti-magnetic surface members 18 embedded in the partition 14. That is, the body member 11 is made of a synthetic resin,
The partition 14 integrally formed with the body member 11 is also made of synthetic resin.

More specifically, the trunk member 11 is
When the body member 11 is injection-molded, the magnetic-resistant surface material 18 is previously arranged inside the mold, and in this state, the magnetic-resistive surface material 18 is embedded inside the partition portion 14 by insert molding that injects a molten resin. It is. The anti-magnetic surface material 18 is a tray-shaped member having a U-shaped cross section. The anti-magnetic surface material 18 has a side wall 18a formed along the periphery thereof. The side wall portion 18a is embedded inside the side wall portion 11a of the body member 11 and extends toward the lid member 12. As a material for forming the anti-magnetic surface material 18, for example, an iron-based anti-magnetic material such as soft iron can be used. The surface of the anti-magnetic surface material 18 on the movement 7 side has an electrode for electrically connecting to the lid member 12. 18b is provided. The electrode 18b is a metal fitting whose base end is joined to the surface of the anti-magnetic surface material 18 and whose front end projects from the surface of the partition portion 14 and reaches the lid member 12. Anti-magnetic surface material electrically connected in this way
The cover 18 and the cover member 12 can perform not only electromagnetic shielding but also electrostatic shielding.

In the third embodiment, the same operation and effect as those of the first and second embodiments can be obtained, and the following effect can be added. In other words, since the anti-magnetic surface material 18 made of soft iron is embedded in the partition portion 14, sufficient anti-magnetic performance can be ensured.
Since it has sufficient tensile strength and rigidity, the partitioning portion 14 is reinforced by the anti-magnetic surface material 18, and the trunk member 11 can secure sufficient rigidity even if the thickness is small. In addition, the overall size of the timepiece 1 can be prevented from becoming large. In addition, since the anti-magnetic surface material 18 and the lid member 12 are electrically connected by the electrodes 18b, the space in the machine room 16 is not only electromagnetically shielded but also electrostatically shielded by the anti-magnetic surface material 18 and the lid member 12. This can further prevent malfunction of the internal electronic circuit.

FIG. 5 shows a fourth embodiment of the present invention. In the fourth embodiment, the partition 14 in which the dial 2 in the third embodiment is directly provided on the surface is replaced with the partition 14 to which the EL element 9 having the dial 2 on the surface is attached. is there. That is, the characters (numbers) for time display on the dial 2 are formed on the surface of the EL element 9. EL
The element 9 is a backlight of the dial 2. By operating a push button (not shown), the EL element 9 is turned on, and the time indicated by the clock 1 can be read even in darkness. In the center of the partition 14, a through hole 4 is provided for inserting a rotary shaft for driving the hands 5a, 5b, 5c to rotate. A cable (not shown) is also inserted through the through hole 4 to supply power from the movement 7 to the EL element 9. The EL element 9 generates electromagnetic noise when emitting light. Electromagnetic noise generated by the EL element 9 is shielded by the anti-magnetic surface material 18 and the cover member 12 so as not to reach the inside of the machine room 16. This gives E
Even if the L element 9 is turned on, the internal electronic circuit does not malfunction.

In the fourth embodiment, the same operations and effects as those of the first to third embodiments can be obtained, and the following effects can be added. That is, since the EL element 9 serving as the backlight of the dial 2 is provided, the time indicated by the clock 1 can be read even in darkness. Also, the EL element 9 is attached to the front surface of the partition portion 14 in which the anti-magnetic surface material 18 is embedded, and the electromagnetic noise generated by the EL element 9 is shielded by the anti-magnetic surface material 18 and the cover member 12. Even if the element 9 is turned on, malfunction of the electronic circuit provided inside the machine room 16 can be prevented.

FIGS. 6 to 9 show a fifth embodiment of the present invention. In the fifth embodiment, the timepiece 1 having only the time display function in the first embodiment is replaced with a chronograph 1A as a multifunction timepiece having a timekeeping function (chronograph function) in addition to the time display function. It is. 6 and 7, a chronograph 1A is one in which a movement 7A provided with electronic components to be described later is housed in a case 10, and the movement 7A drives a plurality of hands 21 to 27 indicating time and the like. It is an analog type. In FIG. 6, the chronograph 1A includes an hour hand 21, a minute hand 22, and a small second hand 23 as normal time display hands for performing normal time display. The small second hand 23 is arranged at a position shifted in the direction of 9 o'clock on the dial 2 with respect to the center axis of the chronograph 1A. In addition, case 10 which stores movement 7A,
As will be described in detail later, the dial 2 includes a partition portion 14 described below, on which the dial 2 is formed, a body member 11 on the periphery of the dial 2, and a lid member 12 described below that closes a rear opening of the body member 11. Things.
Among these, the partition part 14 and the body member 11 are integrally formed.

The chronograph 1A is provided with a crown 6, an A button 6A and a B button 6B, which are external operation members. The crown 6 is fixed to the winding stem 43 which forms an external operation member together with the crown 6. The crown 6 and the winding stem 43 are formed of a conductive material. Among them, the winding stem 43 is inserted inside the case 10. A packing 29 as a sealing member is provided between the winding stem 43 and the case 10 in order to ensure waterproofness of the case 10.
Is interposed. The packing 29 is formed of an electrical insulator that does not conduct electricity. Here, the crown 6 and the winding stem 43 are made of metal such as stainless steel, gold, and titanium. As a material of the packing 29, an elastic electric insulator such as a synthetic resin elastomer or plastic is used.

The chronograph 1A has, as additional functions, a chronograph function for displaying elapsed time and an alarm function for sounding an alarm at a set time. That is, the chronograph 1A is disposed coaxially with the hour hand 21 and the minute hand 22 as an additional function display indicator,
A 1/5 second chronograph hand (hereinafter referred to as a "1/5 second CG hand") 24 for displaying chronograph seconds in / 5 second increments and a position shifted 12 o'clock from the center axis of the timepiece 1. ,
A minute CG hand (hereinafter, referred to as “minute CG hand”) 25 for displaying a chronograph minute by one minute is provided. The chronograph 1A has a watch 1 as a pointer for displaying additional functions.
An alarm hour hand 26 and an alarm minute hand 27 are provided at positions deviated in the direction of 6 o'clock with respect to the central axis of the vehicle.

In FIG. 7, the movement 7A has a planar shape having a side cut portion 2A formed by cutting out the right and left portions in the figure from a perfect circle. Movement 7A has 4
Two step motors 31 to 34 are provided. Thus, the hands 21 to 27 are driven by the step motors 31 to 34 which are separate driving means for each function. That is, the hour hand 21, the minute hand 22 and the small second hand 23
Normally driven by a time drive step motor 31, the 通常 second CG hand 24 is set to a ５ second chronograph step motor 32.
The minute CG hand 25 is driven by a minute chronograph step motor 33, and the alarm minute hand 27 and the alarm hour hand 26 associated therewith are driven by an alarm step motor 34. Therefore, the motor 31 constitutes a normal time drive motor, and the motors 32 to 34 constitute additional function drive motors. Where the hour hand
21, minute hand 22, small second hand 23, 1/5 second CG hand 24, minute CG
Hand 25, alarm minute hand 27 and alarm hour hand 26
Are supported by drive shafts arranged at different plane positions.

Each of the step motors 31 to 34 is a magnetic component for generating a magnetic field. The rotor 35 is driven to rotate by a rotating magnetic field, a stator 36 having a stator hole in which the rotor 35 is disposed, An end is connected, and a core 38 around which a coil 37 is wound is provided. Each rotor 35 is formed by insert-molding a magnet in a resin, and includes a rotor magnet composed of a rotor pinion and an anisotropic magnet. The rotor 35 is supported by a main plate (not shown) and a train wheel bridge (not shown) at tenon portions protruding from both ends thereof. Note that each rotor 35 rotates at a predetermined rotation cycle by passing a drive pulse from a drive circuit operated by the internal battery 39 to the coil 37.

Normal time drive step motor 31 rotor
The fifth wheel & pinion 54 constituting the wheel train 50 meshes with 35,
Thus, the rotation of the rotor 35 is transmitted to the wheel train 50. That is, the rotation of the rotor 35 described above is performed via the wheel train 50 including the fifth wheel 54, the fourth wheel 53, the third wheel 52, the second wheel 51, the minute wheel 56, and an hour wheel (not shown). It is decelerated and transmitted. The transmitted rotation drives the minute hand 22 fitted to the center wheel & pinion 51 and the hour hand 21 fitted to the hour wheel. On the other hand, the rotation of the rotor 35 is
The speed is also transmitted to the small second wheel 55 via the fifth wheel 54 at a reduced speed, whereby the second hand 23 attached to the small second wheel 55 is driven.

A 1/5 second chronograph first intermediate wheel 61 constituting a wheel train 60 meshes with the rotor 35 of the 1/5 second chronograph stepping motor 32.
The rotation of the rotor 35 is transmitted to the wheel train 60. That is, the rotation of the rotor 35 is controlled by the 1/5 second chronograph first intermediate wheel 61 and the 1/5 second chronograph second intermediate wheel 6.
2, and is transmitted to the wheel train 60 including the second chronograph wheel 63 at a reduced speed. By this transmitted rotation, 1 /
1/5 second CG hand fitted to 5 second chronograph wheel 63
24 are to be driven. This 1/5 second CG hand 24
Is set to make one revolution in 60 seconds.

Here, the 1/5 second chronograph wheel 24 is coaxially arranged with the center wheel & pinion 51. Then, the hour hand 21 and the minute hand 22
And the 1/5 second CG needle 24 are coaxially arranged. Further, the rotor 35 of the minute chronograph step motor 33 is meshed with the intermediate minute chronograph wheel 71 constituting the wheel train 70, whereby the rotation of the rotor 35 is transmitted to the wheel train 70. ing. That is, the rotation of the rotor 35 is controlled by the minute chronograph intermediate wheel 71 and the minute chronograph wheel 72.
Is transmitted to the wheel train 70 having the reduced speed. By this transmitted rotation, the minute CG hand 25 fitted to the minute chronograph wheel 72 is driven. Where min C
The G needle 25 is set to make one rotation in 30 minutes.

An intermediate alarm wheel 81 constituting a wheel train 80 meshes with the rotor 35 of the alarm step motor 34, whereby the rotation of the rotor 35 is transmitted to the wheel train 80. That is, the rotation of the rotor 35 is reduced and transmitted to the wheel train 80 including the alarm intermediate wheel 81, the alarm minute wheel 82, the alarm minute wheel 83, and the minute chronograph wheel (not shown). The transmitted rotation drives the alarm hour hand 26 and the alarm minute hand 27.

Here, each end of each of the step motors 31 to 34 is connected to each end of the other adjacent step motors 31 to 34,
Further, a closed area dividing line 100 passing through the core 38 of each of the step motors 31 to 34 is set, and the plane of the chronograph 1A is divided into an inner area 101 inside the area dividing line 100 and an outer area 102 outside the area dividing line 100. When divided, the wheel trains 50 to 80 are arranged in the inner region 101 and are supported by a base plate 1B as a support substrate formed in a shape corresponding to the planar shape of the chronograph 1A. The base plate 1B is formed of a synthetic resin or the like that hardly conducts electricity. Note that the step motor 31
In the present embodiment, the respective end portions to are the connection pin portions that connect the core 38 and the stator 36 in the plane position.

In the outer region 102, a small IC 91 having a C-MOS structure, which is an electronic element, a crystal oscillator 92, a rate adjusting capacitor 93, an alarm booster coil 95, and an alarm transistor 94 are arranged. I have. Each of these electronic elements is mounted on a plexible printed board (not shown). Further, a switch lever 4 operated by the A button 6A and the B button 6B is provided in the outer region 102.
1, 42, a mandrel 45 as a click lever that engages with the winding stem 43, and a canker 46 are arranged. The mandrel 45 is rotated by a sliding operation of the winding stem 43. The winding stem 43 is provided with gears for adjusting time and the like, such as a ratchet wheel and a small iron wheel.

The battery 39 is arranged so that most of its plane is located in the outer region 102. Specifically, the battery 39 is disposed in a space 111 surrounded by the winding stem 43 and the step motor 33 in the outer region 102. In addition, on the opposite side of the battery 39 with respect to the winding stem 43 and in the outer region 102, the winding stem 43 and the step motor
In a space 112 surrounded by 34, an IC 91, a ring 46, and a switch lever 42 are arranged. Therefore, IC91
Are arranged such that the plane position overlaps with the switch lever 42 and the knuckle 46. Of the step motors 31 to 34, the normal time drive step motor 31 and the 1/5 second chronograph step motor 32 are
The other end side of the winding stem 43 (9 o'clock position on the dial 2)
Are located in Then, these motors 31, 32
Are arranged so that the intersection angle of the extension of each core 38 is about 60 degrees. That is, each of the step motors 31 and 32 has one end arranged close to the outer peripheral end of the main plate 1B, and the other end arranged inward from the outer peripheral end of the main plate 1B.

Of the stepping motors 31 to 34, the minute chronograph stepping motor 33 and the alarming stepping motor 34 have driving hands 25 to 27 which are driven by the other hands 21 to 24.
And the output torque may be smaller than that of the step motors 31 and 32, so that the number of turns of the coil 37 can be reduced.
The length of the core 38 is also shortened. The short step motors 33 and 34 each having a short length are arranged substantially adjacent to the battery 39 and the IC 91, and are positioned at 12 o'clock and 6 o'clock on the dial 2 and along the outer peripheral edge of the main plate 1B. Are located. Therefore, each of the step motors 31 to 34 is arranged substantially vertically above and below the line connecting 3 o'clock and 6 o'clock.

Since the step motors 31 to 34 are arranged as described above, spaces 113 and 114 are secured on the outer peripheral side of the step motor 31 and the outer peripheral side of the step motor 32. Of these, one space 113 has a quartz oscillator 92
And the adjusting capacitor 93 are arranged in the other space.
The alarm booster coil 95 and the alarm transistor 94 are dispersedly arranged at 114. As a result, the movement 7A has electronic components, switch levers 41 and 42, and a knuckle, which are main components other than the motors 31 to 34 and the wheel trains 50 to 80.
Spaces 111 to 114 provided in an outer region 102 formed on the outer peripheral side of the motors 31 to 34 are provided.
Are arranged in a distributed manner. As a result, the weight balance and the layout balance are improved.

As shown in FIG. 8, the case 10 includes a body member 11 provided along the periphery of the dial 2 and a body member.
And a cover member 12 for closing the back side opening of the cover 11. Among them, the body member 11 and the partition portion 14 are integrally formed of a synthetic resin mixed with a high magnetic permeability material, for example, ferrite powder, and have a high magnetic permeability. On the back surface of the partition 14, a partition 20 for partitioning the inside of the machine room 16 is provided upright.

The partition 20, like the body member 11, is formed by molding a high magnetic permeability material, for example, a synthetic resin mixed with ferrite powder, and has a high magnetic permeability. The partition part 20 is a member separate from the trunk member 11 and the partition part 14, and has a bar-shaped leg for fixing to the partition part 14 on its bottom surface.
20A is provided. The legs 20A of the partition 20 pass through the through holes 1C formed in the base plate 1B of the movement 7A, and are fitted into the fixing holes 14A of the partition 14, whereby the partition 20
Reference numeral 20 is fixed to the partition 14. Since the switch levers 41 and 42, the knuckle 46, the reed 45 and the winding stem 43 are made of steel and have a high magnetic permeability, they are used together with the partitioning part 20 as a part of a member constituting a magnetic-resistant wall that blocks a magnetic field. May be used.

As shown in FIG. 9, the partitioning section 20 separates the motors 31 to 34, which are magnetic components, from each other and separates the IC 91 from the motors 31 to 34. The wheel train 50, 60, 70, 80 of the partitioning section 20
And the part that overlaps with the battery 39, etc.
Notches (not shown) are provided so as not to interfere with 0, 60, 70, 80, the battery 39, and the like. Thereby, the motor 31
~ 34 generated magnetism is cut off at the partition 20,
The motors 31 to 34 and the IC 91 are not reached. When the surface of the battery 39 is made of a SUS material, the surface of the battery 39 can be used as a part of a member constituting a magnetic-resistant wall that blocks a magnetic field together with the partitioning portion 20. By doing so, a part of the partition 20 is omitted, and the space in the machine room 16 is expanded by the omitted partition 20, so that the size of the case 10 can be further reduced.

In the fifth embodiment, the same operations and effects as those of the first to fourth embodiments can be obtained, and the following effects can be added. That is, while having a high magnetic permeability, a partition section 20 for partitioning the inside of the machine room 16 is provided, and the partition sections 20 separate the motors 31 to 34, which are magnetic components, from each other.
Since the IC 91 is separated from 31 to 34, the magnetism generated by each of the motors 31 to 34 is cut off by the partition unit 20, and the other motors 31 to 34
34 and IC91, the fluctuation of the rotation speed of the motors 31 to 34 and the malfunction of IC91 can be prevented, and the chronograph 1A
Can maintain an accurate operation. This allows
Even if a plurality of the motors 31 to 34 are driven in synchronization, they do not magnetically interfere with each other, so that malfunction can be prevented from occurring.

FIG. 10 shows a sixth embodiment of the present invention. In the sixth embodiment, the partition part 20 separate from the partition part 14 in the fifth embodiment is a partition part 20B integrally formed with the trunk member 11 and the partition part 14.
That is, the body member 11 is formed by molding a synthetic resin which is a non-magnetic material, and the partition 14 and the partition 20B are integrally formed. The trunk member 11, upon injection molding of the trunk member 11, arranges a magnetic-resistant surface material 18c inside the mold in advance,
In this state, by insert molding that injects molten resin,
A magnetic-resistant surface material 18c is embedded inside. The anti-magnetic surface material 18c has a side wall 18a formed along the periphery and an inner wall 19 formed along the partition 20B. Of these, the inner wall portion 19 is embedded inside the partition portion 20B.

Here, the partition 20B is, like the partition 20 of the fifth embodiment, a motor 31-34, which is a magnetic component.
The motors 31 to 34 are separated from each other, and the ICs 91 are separated from each other. The partition 20
Since B is integrally formed with the partition portion 14, the movement 7B includes the motor 31 and the wheel train 50, and the motor 32 and the wheel train
The motor is divided into portions each including the motor 60, the motor 33 and the wheel train 70, and the motor 34 and the wheel train 80. And, in the partition 20B, the movement 7B
In order to mechanically connect the respective parts, a slit (not shown) that partially protrudes a gear provided in each part is provided. The IC 91 is separated from any of the motors 31 to 34 by the partitioning section 20B.

In the sixth embodiment, the same operations and effects as those in the first to fifth embodiments can be obtained, and the following effects can be added. That is, the partition 20B is formed of a synthetic resin, and the anti-magnetic surface material 18c having a high magnetic permeability is embedded therein, so that when forming the partition 20B, the partition 20B is formed together with the body member 11 and the partition 14. , Can be integrally molded by insert molding using the injection molding method.
14, the mass production of the torso member 11 becomes easy,
Eleven manufacturing efficiency can be improved.

The present invention is not limited to the above embodiments, but includes various improvements and modifications without departing from the scope of the present invention. For example, the timepiece is not limited to an electronically controlled mechanical timepiece that drives a hand and a generator with a mainspring, and controls the rotation speed of the generator with an electronic circuit, and an analog quartz that drives a hand with a step motor. Alternatively, it may be a simple mechanical timepiece that does not include an electronic circuit. The timepiece is not limited to an analog type that indicates the time by hands and a dial, but may be a digital type in which digital display means such as a liquid crystal display is provided on the front surface of the partition.

The anti-magnetic surface material is not limited to a plate-shaped member made of a material having a high magnetic permeability, but may be a net-shaped member having a large number of fine holes, as long as the anti-magnetic performance can be obtained. The form and material may be appropriately selected for implementation.

Further, the case is not limited to a case in which all the functional components operating as a timepiece such as a movement are housed inside. For example, a radio wave which can display an accurate time by receiving a standard time radio wave. When the present invention is applied to a timepiece, an antenna for receiving a standard time radio wave is not housed in a machine room provided between a partition member and a cover member, and the antenna room is made of a material that transmits radio waves. It is preferable that the antenna is provided outside the case and the antenna is housed in the antenna chamber. With this configuration, even if a magnetic component such as a step motor housed in the case generates a magnetic field, the magnetic field generated by the magnetic component does not reach the antenna due to the anti-magnetic property imparted to the case. No noise enters the standard time radio wave received by the device, and the sensitivity of the standard time radio wave can be improved.

Further, the lid member is not limited to one formed of a material having high magnetic permeability, but may be formed of a non-magnetic material. When a lid member made of a non-magnetic material is used, a magnetic-resistant member may be attached to at least one of the front and back sides of the lid member, or a magnetic-resistant surface material may be embedded inside the lid member. Further, the insert molding is not limited to an injection molding method using a synthetic resin as a material, but may be a die casting method using an aluminum alloy or the like as a material.

[0060]

As described above, according to the present invention, it is possible to sufficiently secure the magnetic resistance without increasing the size of the timepiece.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the first embodiment.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a sectional view showing a third embodiment of the present invention.

FIG. 5 is a sectional view showing a fourth embodiment of the present invention.

FIG. 6 is a front view showing a fifth embodiment of the present invention.

FIG. 7 is a front view showing a movement according to the fifth embodiment.

FIG. 8 is a sectional view showing the fifth embodiment.

FIG. 9 is a front view showing a trunk member according to the fifth embodiment.

FIG. 10 is a sectional view showing a sixth embodiment of the present invention.

[Explanation of symbols]

 1 Watch 1A Chronograph as a watch 5a-5c pointer 10 case 11 body member 12 lid member 14 partition 16 machine room 17a anti-magnetic member 18,18c anti-magnetic surface material 20,20A partition 21-27 pointer 32-34 as magnetic parts Step motor

Claims (12)

[Claims] 1. An annular body member serving as a side wall portion of a case, and a partition for partitioning an internal space of the case into a front side and a back side are integrally formed, and an opening on the back side of the body member is formed. A timepiece provided with a closing lid member, wherein a machine room which is a space for accommodating a timepiece machine is formed between the partition portion and the lid member, and the body member and the lid member are at least the A timepiece wherein a portion surrounding a machine room has a high magnetic permeability. 2. The timepiece according to claim 1, wherein said body member is integrally formed of a material having a high magnetic permeability. 3. The timepiece according to claim 1, wherein the body member is formed by integrally molding a synthetic resin mixed with a powder of a high magnetic permeability material. 4. The timepiece according to claim 1, wherein the body member is formed of a non-magnetic material, and at least one of the front and back surfaces of the partition is covered with a magnetically permeable member having high magnetic permeability. A watch characterized by being worn. 5. The timepiece according to claim 1, wherein the body member is formed of a non-magnetic material, and a magnetic-resistant surface material having a high magnetic permeability is embedded in the partition. A watch that features. 6. The timepiece according to claim 5, wherein a synthetic resin is used as the non-magnetic material, and the partition portion in which the anti-magnetic surface material is embedded is formed by insert molding. A clock characterized by the following. 7. The timepiece according to any one of claims 1 to 3, wherein a partition portion for partitioning the inside of the machine room is provided upright on a surface on a back side of the partition portion, and the partition portion includes: A timepiece having high magnetic permeability. 8. The timepiece according to claim 7, wherein a magnetic component that generates magnetism is provided in the machine room, and the partition part separates the magnetic component from other components. And watch. 9. The timepiece according to claim 8, wherein the partition portion is formed of a non-magnetic material, and the partition portion has an anti-magnetic surface material having a high magnetic permeability embedded therein. A clock characterized by the following. 10. A timepiece according to claim 9, wherein said partition portion is made of synthetic resin, and said anti-magnetic surface material is insert-molded inside said partition portion. 11. The timepiece according to claim 1, wherein said partition part also serves as a middle frame for fixing parts of said timepiece to said machine room. clock. 12. The timepiece according to claim 1, further comprising a plurality of hands attached to drive shafts provided at different positions, wherein at least one of these hands is A timepiece provided for functions other than the time display and driven by separate driving means.