JPS6318948Y2 - - Google Patents

Abstract

An analog quartz wristwatch movement comprises a base plate (10) with a recess to receive a power source (battery) (29), an electromechanical transducer (stepping motor) having a coil (22), a wheel train arranged generally centrally and around part of the periphery of the battery (29), a circuit board (12) carrying electronic components, and a battery retaining spring (37) (serving as the negative contact of the battery) which is secured (by a screw 38) at a position between the yoke (24) of the electromechanical transducer and the battery (29), the position at which said retaining spring (37) is secured being located closer to the centre of the wristwatch movement than one of the positions at which said electromechanical transducer is secured (by a screw 26a). A long motor coil (22) can thus be accommodated parallel to the base plate, without restricting the battery space. The screw (38) holds the spring (37) in contact with a conductive plate which is located on the circuit board (12) above the yoke (24). <IMAGE>

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the arrangement structure of an analog crystal wristwatch. .

[Conventional technology]

Conventionally, in an analog crystal wristwatch equipped with a pulse motor as an electro-mechanical converter, the clock components including the pulse motor, such as a power battery, a drive train, a circuit base, and the back parts that operate them. The mechanism occupies most of the entire watch, and in designing a thin and compact watch, it is of course important to avoid overlapping the main watch components as much as possible, but it is also important to avoid overlapping the main watch components as much as possible. Therefore, how to reduce the overlap of component parts and how to make the component parts thin and compact were the challenges to realizing an analog quartz wristwatch with a clock movement shape that is thin, small, and has a good design. On the other hand, in order to extend the battery life of a watch, it is possible to use a large battery with a large electric capacity, but this makes it difficult to make the watch thinner and smaller; Using a small battery with a small electric capacity for timekeeping has a mutually contradictory relationship in that the battery life of the watch will be shortened, and it is in this contradictory relationship that it is impossible to make the watch thinner, smaller, and have a longer lifespan. In order to satisfy this requirement, we must improve the conversion rate of the electro-mechanical converters such as pulse motors that consume relatively large amounts of power in watches, and reduce the power consumed by the electro-mechanical converters. ,
There was a strong desire for watches to be thin, compact, and have a long lifespan.

Under such circumstances, for example, a small electronic wristwatch as shown in Japanese Patent Application Laid-open No. 54-24673 has been proposed.

In this electronic wristwatch, a gear train is placed in the center of the round main plate, and around this gear train, there are batteries, coils that make up the electromechanical converter, electronic circuits, circuit elements such as a crystal oscillator, and the back. Parts are placed.

[Problem that the invention attempts to solve]

However, with the configuration of the electronic wristwatch as described above, the total planar area of the watch movement is smaller than the planar area of the battery, making it impossible to create a rectangular and thin watch movement with good design. Also, in order to increase the conversion efficiency of an electro-mechanical converter, it is possible to improve the conversion efficiency of a coil, but as in the electronic wristwatch mentioned above, the coil is wound around a short coil core. In this case, in order to obtain a predetermined conversion efficiency, it is necessary to increase the number of turns by winding the coil in multiple layers. Therefore, the distance to the coil winding core becomes longer as the number of turns increases, and the conversion efficiency per unit number of turns cannot be expected to improve as the number of turns increases.In fact, the diameter of the entire coil increases due to the multilayer winding of the coil. This caused the problem that the watch became thicker.

For this reason, we aim to improve the conversion efficiency per unit number of turns of the coil by increasing the length of the coil core as much as possible, and also reduce the number of layers in the multilayer winding of the coil so that the overall diameter of the coil is as small as possible. The idea was to make the watch thinner.

However, simply increasing the length of the coil would result in a larger watch movement, and it was difficult to arrange a long coil, especially in the aforementioned electronic wristwatch with a round main plate.

The purpose of the present invention is to solve the above-mentioned problems and provide an analog crystal wristwatch in which a long coil can be arranged without increasing the external size of the clock movement.

[Means for solving problems]

In order to achieve the above object, the present invention has the following configuration. That is, a base plate having a substantially rectangular shape with first and second long sides and first and second short sides, a drive wheel train, and a base plate having a length at least half the length of the short side. a power supply battery having a diameter, a coil constituting an electro-mechanical converter and having fixed parts at both ends, a circuit base equipped with circuit elements such as an electronic circuit and a crystal resonator, backing components, and the power source. In an analog crystal wristwatch having a negative contact receiving spring that connects a battery and the circuit base and whose stop position is fixed by a screw, the driving wheel train is disposed approximately in the center of the base plate, the power supply battery is arranged in a corner formed by the first long side and the first short side of the base plate, the coil is arranged so that its longitudinal direction is along the second long side, In the second long side direction, one of the fixing parts of the coil is placed closer to the first short side, which is the outer side of the base plate, and the stop position of the negative contact receiving spring is The negative contact receiving spring and the circuit element are each arranged closer to the center of the ground plate than one of the fixed parts,
A part of a circuit base disposed along the coil and between the coil and the drive wheel train connects the circuit element such as the electronic circuit and the crystal resonator to the second short side. It is characterized in that it is arranged between the drive wheel trains, and the backing part is arranged along the part on the first long side where the power supply battery is not provided.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings. FIG. 1 is a plan view showing the movement structure of an analog quartz wristwatch that is an embodiment of the present invention. Second
The figure is a sectional view taken along line A-A in Figure 1, and Figure 3 is B in Figure 1.
-B cross section and C-C cross section, Figure 4 is D- in Figure 1.
They are a D cross-section, an E-E cross-section, and an F-F cross-section.

1 is the base plate, and the first and second short sides 1e and 1f
The first and second long sides 1g and 1h form a substantially rectangular shape. 2 is a circuit base made of synthetic resin, and is equipped with a crystal resonator 3, a trimmer capacitor 4, an electronic circuit 5, and a temperature compensation capacitor 6.
The circuit base 2 on which these elements are mounted is molded with resin so as to partially embed the lead plate 11 on which the electronic circuit 5 is mounted and the screw tubes 8, 9, and 10 are connected. The screws 8a fix the crystal resonator 3 with the crystal holder 3a, and the screws 9a and 10a fix the temperature compensation capacitor 6 to the circuit base 2 via the lug plates 9b and 10b. 12 is a coil constituting an electro-mechanical converter, and includes a coil winding part 12a,
It consists of a coil core 13 and fixing parts 13a and 13b at both ends of the coil core 13.
In addition, the electric-mechanical converter has a coil 12 and a yoke 1.
4. Consists of a rotor 26. 15, 16
is a threaded tube in which a female threaded portion is formed, and is implanted into the base plate 1. Base plate 1 and screw tube 1
5 and 16 are thin, so when tightening screws 15a and 16a with male threads, screw tube 1
5, 16 may easily rotate or come off, but in this embodiment, the threaded tubes 15, 16 are provided with irregularly shaped flanges 1.
By forming the flange portions 5b and 16b, rotation is prevented by engaging the flange and the base plate side portions 1a and 1b, and rotation is prevented by the flange portions 15b and 16b. 17 is a magnetic shield plate made of a magnetic material for protecting the coil 12 from external magnetism, and the installation of the magnetic shield plate 17 is as follows:
In order to prevent the magnetic shield plate 17 from wobbling due to an external impact force, its position is regulated by the coil winding frames 18a, 18b and the side portions 1c, 1d of the main plate 1, respectively, and is fixed to the main plate 1 with screws. 1
Reference numeral 9 denotes a power supply battery having a diameter approximately half the length of each short side of the main plate 1, and is connected to the fourth wheel & pinion 20a, second wheel & pinion 20b, etc. which are the driving wheel train arranged approximately in the center of the main plate 1. Avoiding plane overlap, approximately 12 o'clock on main plate 1.
The part occupying the 3 o'clock direction, that is, the first short side 1 of the main plate 1
It is arranged at a corner formed by e and the first long side 1g. Further, a part of the outer periphery of the power supply battery 19 is supported by a wheel train support 31 constituting a driving wheel train, and is fixed to the base plate 1 by battery holding plates 29 and 30, which will be described later.

Reference numeral 27 denotes a negative contact receiving spring for connecting the cathode of the power supply battery 19 and the circuit base 2, and its stop position is fixed to the base plate 1 by a set screw 28.

The coil 12 constituting the electro-mechanical converter is arranged along the second long side 1h of the main plate 1,
Furthermore, in the direction of the first long side 1h, one fixed part 13a of the coil 12 is moved closer to the first short side 1e, which is the outside of the main plate 1, and the set screw 28, which is the set position of the negative contact receiving spring 27, , one fixed part 13
They are arranged closer to the center of the main plate 1 than a. And the coil 12 has fixed parts 13a, 13
b. It is fixed to threaded tubes 15 and 16 implanted in the base plate 1 through the yoke 14. As shown in FIG. 4, the yoke 14 is thinly arranged so as to be in contact with the base plate 1, and is connected to the lead plate 11 of the circuit board 2, which connects the negative contact receiving spring 27 of the power supply battery 19 and the electronic circuit 5. The connection is made at a position above the yoke 14, that is, between the drive train and the coil 12, as shown in FIG.
They are connected at the lead plate 11c of the circuit board 2 disposed between them, and are connected and fixed by a set screw 28.

The back parts operated by the winding stem 21, that is, the mandrel 22, the cannula 23, the back presser 24, and the reset lever 25 are arranged in a portion along the first long side 1g where the power battery 19 is not present.

Further, circuit elements such as the electronic circuit 5 and the crystal oscillator 3 equipped on the circuit base 2 are arranged between the drive wheel train and the second short side 1f, and a part of the circuit base 2 is A reset terminal 11a is arranged near the back parts.
is provided, and when the winding stem is operated, the electronic circuit 5 is switched by switching with the tip 25a of the reset lever 25.
Reset.

Furthermore, a lead plate 11b extending from the electronic circuit 5 of the circuit board 2 is elastically connected to the terminal processing section provided on the fixed section 13b side of the coil 12.

The negative contact spring 27 of the power battery 19 is welded to the lead plate 11c of the circuit board 2, and when the set screw 28 is loosened, the current from the power battery 19 is no longer supplied to the electronic circuit 5, and the clock is turned off. There is no stopping anything. Further, the power supply battery 19 is fixed with screws using battery holding plates 29 and 30. The battery holding plate 29 is fixed to the base plate 1 through the gear train bridge 31, and the battery holding plate 30 is prevented from floating by a lifting prevention shaft 32, and can be freely rotated by loosening the screw 33. To replace the battery, loosen the screw 33, and further rotate the holding plate 30 in the direction of arrow A in FIG. Therefore, the battery contact portion 27a of the negative spring 27 is closer to the presser plate 3 than the center of the battery.
Since it is biased towards the 0 side, the battery 19 will pop out by the spring force of the negative spring 27 without loosening the holding plate 29. This makes battery replacement very easy.

In addition, the bent portions 29 of the holding plates 29 and 30 hold the top surface of the battery.
Even if the pressure of the negative spring 27 is increased by holding it down with a and 30a, the battery 1 is
9 does not pop out, and contact failure between the negative spring 27 and the battery 19 due to battery leakage or the like is reduced.

[Effect of idea]

As described above, according to the arrangement of the main components of the present invention, in a watch in which a power battery having a diameter approximately half the length of the short side of the rectangular base plate is disposed at the corner of the rectangular base plate, the coil is located at the corner of the rectangular base plate. 2, and in a narrow space between the power supply battery and the second long side, one fixed part of the coil is placed close to the first short side, and the negative contact receiving spring is Since the stop position is located closer to the center of the main plate than one of the fixing parts, the length of the long side of the main plate can be effectively used to increase the coil length, improving exchange efficiency per unit number of coil turns. be able to.

Furthermore, the connection between the cathode of the power battery and the electronic circuit using the circuit board can be made over the shortest possible distance, and the circuit board does not surround the power battery as in the conventional example of the electronic wristwatch, and moreover, the circuit board is located on the back. It can be placed so that it does not overlap surrounding parts. Therefore, it is possible to construct a thin and small analog crystal wristwatch in which the space on the rectangular base plate is effectively used and overlapping parts are minimized.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the movement structure of an analog quartz wristwatch which is an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a sectional view taken along line B-B in Fig. 1.
and C-C sectional view, FIG. 4 is D-D in FIG. 1,
It is sectional drawing of EE and FF. 1... Main plate, 2... Circuit base, 12... Coil, 13... Coil winding core, 14... Yoke, 16
a... Set screw, 19... Power battery, 27... Negative connection receiving spring, 28... Set screw.

Claims (1)

[Claims for Utility Model Registration] A base plate having a substantially rectangular shape with first and second long sides and first and second short sides, a drive wheel train, and a length of the short side. A power supply battery having a diameter of at least half the length, a coil constituting an electro-mechanical converter and having fixed parts at both ends, a circuit base equipped with circuit elements such as an electronic circuit and a crystal oscillator, and a back In an analog quartz wristwatch having a negative contact receiving spring that connects the power supply battery and the circuit base and whose stop position is fixed by a screw, the power source battery is placed in a corner formed by the first long side and the first short side of the base plate; In the second long side direction, one of the fixed parts of the coil is placed closer to the first short side, which is the outer side of the base plate, and closer to the negative contact receiving spring. The stop positions are each arranged closer to the center of the ground plate than one of the fixing parts, and the negative contact receiving spring and the circuit element are arranged,
A part of a circuit base disposed along the coil and between the coil and the drive wheel train connects the circuit element such as the electronic circuit and the crystal resonator to the second short side. and the driving wheel train, and the backing part is arranged along a portion of the first long side where the power battery is not provided.