JPH0127111Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a small crystal watch.

The purpose of the present invention is to provide an ultra-small crystal watch. Furthermore, the aim is to stably provide ultra-small crystal watches at low prices and in large quantities. Currently, analog crystal watches are required to be thinner and smaller, and women's crystal watches are particularly required to be smaller.

Women's watches are required to come in a variety of sizes due to their fashion role. In order to meet this demand, a small movement size is a necessary condition. Furthermore, this type of watch has traditionally been a special, expensive watch, and in recent years, providing such watches at low prices has become a major theme.

FIGS. 1 and 2 are plan views of conventional ultra-small crystal watches, respectively.

FIG. 1 is a schematic diagram of the device shown in Japanese Patent Application No. 55-99414. The battery 1 and the coil 2 forming part of the step motor are laid out in a two-dimensional manner,
Circuit block 4 including MOSIC 3 under the battery,
A wheel train section 5 is arranged, and below the coil 2, a stator 6 and a rotor 7, which are other components of the step motor, are arranged. This structure has the following drawbacks. Since one of the motor components, which were conventionally arranged in a planar manner, is arranged in a cross-sectional manner, the magnetic coupling between the stator and the core of the coil is unstable. Furthermore, since the circuit section and the coil section are far apart in plane, the electrical continuity between them is unstable. Mainly to compensate for these shortcomings, a complicated structure became inevitable, which seriously hindered mass production. Figure 2 is Tokugansho.
54-143580, there is a circuit block 4 under the battery 1, and a wheel train section 5 is arranged below it.

Although this structure is the ultimate form of miniaturization, it has to be thick due to its three-layer structure, reducing its commercial value in terms of thickness. Also, because it was the ultimate form of miniaturization, mass production was extremely difficult.

The purpose of the present invention is to provide an ultra-compact analog crystal clock to meet such demands.

The present invention will be explained using figures.

FIG. 3 illustrates the concept of the invention.

21 is a battery, 22 is a circuit block, 23 is a switching section, and 24 is a train wheel section including a motor. 25 is a hand, and the hour and minute hands are usually the center. 26
is the dial. In other words, the battery and circuit blocks are laid out in a two-dimensional layout, and the other switches, motors, and gear trains are laid out in the same two-dimensional layout, and each is overlapped in cross section. The electrical and mechanical components are laid out separately above and below, and the coil and circuit contact points, which are the contact points between the electrical and mechanical components, are placed in the same area on a plane. This makes it possible to achieve mechanical force transmission and electrical connection easily and stably.

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

Top left is battery positive terminal 125, crystal unit 1
24, the circuit section consisting of the circuit board 122, the switching section consisting of the pusher presser 121, the pusher seat 120, the pusher 116, the bolt 118, the winding stem 115, and the thread wheel 119 on the lower left, the battery section of the battery 128 on the upper right, the right The lower part is a train wheel section consisting of a second wheel & pinion 110, a third wheel & pinion 109, a fourth wheel & pinion 108, a rotor, and a train wheel bridge 112. Further, 101 is a main plate, 131 is a dial plate, 129 is an hour hand, and 130 is a minute hand.

Fig. 5 is a plan view of the gear train and its surroundings, Fig. 6 is a plan view of the switching and its surroundings, and Fig. 7 is a plan view of the battery section and circuit section provided above the gear train and switching section. It is a diagram. In FIG. 5, 101 is the main plate which is the base frame of the watch body, 102 is the rotor magnet 102a having two poles of N and S in the outer diameter direction, the rotor pinion 102b and the seat 1.
The rotor consists of 02c. A stator 103 is made of a ferromagnetic material and has an inner hole, an inner notch, and an outer notch. 104 is a magnetic core 10 made of ferromagnetic material.
This is a coil block that integrates a substrate 106 in which a coil is wound around the rod portion of the coil 5 and both ends of the coil are connected to an electrode pattern by soldering or the like. The rotor, stator, and coil block constitute a motor. This motor is MOSIC1 in Figure 7.
The current flowing through the coil due to the output pulse applied by 07 generates a magnetomotive force, and the resulting magnetic flux saturates the smallest part formed from the outer notch and inner hole of the stator, generating N and S poles. This is a step motor that performs magnetic rotation by attracting and repelling a rotor magnet. A fourth wheel & pinion 108, a third wheel & pinion 109, a second wheel & pinion 110, and a sun wheel & pinion 111 of the reduction gear train are connected to the rotor pinion, and transmit rotation to known hour and minute hands. These gear trains are supported by stones and bushings on the main plate and the gear train bearing 112, and screws 132 and 1
A gear train bridge is fixed to a pin set up on the main plate at 33. 113 is a battery negative terminal, and 114 is a battery terminal insulator. Battery terminal insulator is dowel 1
It is fixed to the main plate by 14a ₁ and 114b, and 114
The battery negative terminal is positioned by a ₂ and 114c. This serves the dual role of fixing the battery negative terminal and insulating it from the ground plane. The battery negative terminal is a springy contact 1.
The section 13a is in pressure contact with the battery negative section to establish conduction, and the section 113b, which also has spring properties, is in contact with the circuit pattern to provide a negative input to the MOSIC. In FIG. 6, the winding stem 1 which is the external operating member
15 is supported by a shaft portion 115a and a tenon portion 115b at the tip in a horizontal hole in the base plate. The shifter 11b is rotatably supported around a shifter shaft 117 erected on the main plate, and is engaged with a recess 115c of the winding stem. Also, the dowel 116a is the bolt 11.
In this case, it is positioned at two positions according to the recessed portion of the click portion by engaging with the click portion 118a of No. 8. The bolt 118 is always pressed against the rear end by the force of the spring portion 118b, and the threaded wheel 11 is engaged with the chamfered portion 115d of the winding stem at its tip.
I am guiding you through 9. Then, the wheel is moved to the normal position and the reset position depending on the position of the shifter. Although not shown, when the winding stem is pulled out and set to the reset state, the tip of the tooth 119a of the wheel
meshes with the second gear, and the time can be adjusted by turning the winding stem. In the case of this movement, due to its miniaturization, there is no regulating lever, so the movement of the wheel is transmitted to the rotor through the second, third, and fourth wheels.
These switching parts are covered with a pusher presser 121 via a pusher presser seat 120. The oshidori holder holds the oshidori with a springy portion 121a, is guided by two pins set up on the base plate, and is fixed with screws. Next, referring to FIG. 7, the circuit board 122 has a copper foil pattern 123 formed on polyimide resin, which is an insulating material, and the pattern, MOSIC 107, and crystal unit 1.
24 etc. are connected. 123 circuit patterns
Portion a is pressed into contact with portion 113b of the battery negative terminal and electrically conductive, and portion 123b of the overhang contacts crystal unit holding portion 125a of battery positive terminal 125, so that the battery voltage is input to the MOSIC. Although not shown, the output lead pattern from the MOSIC is connected to the coil 104 of the step motor and outputs a predetermined pulse signal to drive the motor. Circuit board 122, battery positive terminal screws 134, 13
5 is fixed to a pin placed on the main plate. One of the screws 134 also fixes the speed/speed switch lever 126 onto the battery positive terminal. The speed/speed switch lever 126 has an L-shaped bent end positioning part, and when this is inserted into the battery positive terminal or the speed/speed hole 127a or 127b of the circuit board and fixed, the logical speed/speed pattern 1 of the circuit board is set.
It is configured to be crimped onto 23c or 123d with spring properties. Furthermore, when the speed/speed switch lever is assembled into the speed/speed hole 127c of the battery positive terminal (the state shown in the figure), it does not come into contact with the circuit pattern because the circuit board is a notch. Set the speed/speed switch lever to speed/speed holes 127a, 127b, 1
27c and fix it with a screw, it will come into contact with the logical speed/speed patterns 123c, 123d, ground the same patterns, and speed speed. When installed in 127c, there is no pattern, so pattern 123c is +0.264 seconds/day, 1 based on this position.
If the circuit is configured so that 23d can be adjusted theoretically by -0.264 seconds/day, it can be adjusted in three steps in total. Therefore, even when the movement size is very small, such as in a small women's watch, and the space available for logical adjustment is extremely limited on the circuit board on which the crystal unit and MOSIC are mounted, it is possible to separate the adjustment and adjustment holes in this way. By setting this, it becomes possible to use the space effectively and rationally. Note that the circuit board 122 is integrated with the support member 122a to constitute a circuit block.

In addition, in this embodiment, joint surfaces between the movement and the exterior, which are generally called mechanical holes, for fixing the movement to the exterior are provided on the ^3H side and the ^9H side. In Figure 7, the machine falling surface on the ^3H side is 121c. ^9H side is 112a. Conventionally, this mechanical drop was performed on the main plate, but in this embodiment, the upper surface of the above-described presser foot 121 is used on the ^3H side. 9
On ^{the H} side, the upper surface of the shaft array bearing 112 described above is also used.

As a result, the space of the mechanical part, which could not be used as a movement space in the past, can now be used as a structural space for mechanical parts, leading to further miniaturization.

Also, according to the layout of this invention, it is possible to completely remove and arrange the three major elements that determine the thickness of the movement (battery, coil, and crystal) on a flat surface, and the stacking method also makes it possible to reduce the thickness of the movement. It is possible.

As explained above, according to the present invention, the coil block of the motor is arranged so that it does not overlap with the gear train bridge, the gear train part and the switching part are arranged side by side at almost the same height on the ground plane, and the battery is The circuit block is placed in an overlapping manner above the gear train bridge, and a part of the outer periphery of the battery is placed close to the outer periphery of the main plate, eccentric to the main plate, and the circuit block is placed in an arc-shaped space formed by the eccentricity of the battery. The coil block and the circuit block are arranged side by side within almost the same height, and the circuit block is arranged so as to overlap the coil block and the switching section. As a result, the mechanical elements of the motor, the gear train section, and the switching section are located at approximately the same height, so the transmission of force from the motor to the gear train section is also reduced from the switching section to the gear train section. The force is also transmitted in a flat manner, and the force is transmitted stably without any force or loss. In addition, since the circuit block with electrical elements and the battery are located at almost the same height, the terminal member that electrically connects the circuit block and the battery must be bent for positioning and adjusting the spring force. Reliable electrical continuity can be achieved without the need for Furthermore, since the mechanical elements and the electrical elements are functionally arranged at the same height, they can be disassembled for each function for inspection and repair, and they can be easily assembled.

In addition, since the circuit blocks are formed and arranged in the arc-shaped space formed by the batteries that are placed eccentrically with respect to the main plate, it is possible to ensure sufficient width and strength even for small watches, so that the electronic elements can be can be maintained in a stable state.

Furthermore, by arranging the battery and the coil block so that they do not overlap, there is no need to increase the thickness, and by arranging the coil block and the circuit block in an overlapping manner, the device can be made thinner. It is possible to easily, stably, and provide large quantities of ultra-small analog crystal watches without increasing their thickness.

[Brief explanation of the drawing]

Figure 1: Schematic plan view of the conventional example, Figure 2: Conceptual diagram of the conventional example, Figure 3: Conceptual diagram of the present invention, Figure 4.
Figure: Cross-sectional view of one embodiment, Figure 5: Plan view of wheel train section of one embodiment, Figure 6: Plan view of switching section of one embodiment, Figure 7: Battery section and circuit of one embodiment. A plan view of the section. 1, 21, 128... battery, 4, 22... circuit block, 5, 24... wheel train section, 23... switching section.

Claims (1)

[Scope of utility model registration request] A circuit block having at least a circuit board on which a MOSIC and a crystal oscillator as a time standard are arranged, a rotor and a stator arranged on a ground plane,
a wheel train portion comprising a motor having a coil block, a wheel train that transmits the movement of the motor to a pointer, and a train wheel bridge that pivotally supports the wheel train between the base plate;
In an analog crystal clock comprising a switching unit having a mechanism for correcting the position of the pointer using an external operating member and a battery as a power source, the coil block of the motor is arranged so that it does not overlap with the train wheel bridge in a plane. The gear train part and the switching part are arranged side by side at substantially the same height on the base plate, and the battery is arranged in an overlapping manner above the gear train bridge, and a part of the outer periphery of the battery is The circuit block is arranged eccentrically with respect to the ground plate close to the outer periphery of the main plate, and the circuit block is arranged in an arc-shaped space formed by the eccentricity of the battery, and each of the battery and the circuit block is placed on the receiving plate. The circuit block is arranged to overlap the coil block and the switching section, and the coil block is arranged so as not to overlap the battery. Analog crystal clock.