JPS5956184A - Thin type timepiece - Google Patents

Abstract

PURPOSE:To decrease the number of a part and to reduce the thickness of a timepiece by forming a dial of an aluminum printed board, providing a time display to an aluminum base material surface, and fitting circuit parts to a copper foil surface. CONSTITUTION:The dial 1 is made of the aluminum printed board. A scale and a numeral of the timepiece are printed on the surface of the aluminum base material. A circuit pattern is formed on the surface of the copper foil of the dial 1 and a crystal oscillator 2, an integrated circuit 3, a trimmer capacitor 4, a chip capacitor 6, etc., are soldered. Mechanical parts such as gears and a motor are arranged without overlapping the circuit part.

Description

[Detailed description of the invention] This invention relates to a thin case 1.

Conventional watches are divided into an hourly outer case and a timepiece movement, and after the timepiece movement is assembled into the timepiece outer case, the hour and minute hands are attached. Therefore, the number of assembly steps and number of parts is large, and there is a limit to the amount of floating of the entire watch when trying to make it thinner.Therefore, the object of the present invention is to reduce the number of assembly steps and number of parts, and to reduce the thickness of the watch. The goal is to provide the following.

An embodiment of the invention is shown in FIGS. 1 to 7. 1st
In the figure and Fig. 3, 1 is a dial plate, and as shown in Fig.
It is made from an aluminum base printed board. A clock scale and numbers are printed on the surface of the aluminum base material 1a of the dial l. A circuit pattern is formed on the surface of the copper foil 1c of the dial 1 by etching, and a crystal oscillator 2. Integrated circuit 3. Trimmer capacitor 4. Chip capacitor 5 etc. are attached to Ushida.

6a is a negative terminal in contact with the battery 7, and 6b is a glass terminal.

FIG. 4 is an exploded perspective view of the main parts. 8 is the front case of the movement, 9 is the rear case of the movement, 1O is the motor core, 11 is the coil, 12 is the rotor, 13 is the second wheel, 14
is the minute wheel. The movement front case 8 is the rotor 1
2, 2nd wheel] The area other than the part that holds 3 and the minute button wheel 14 is largely hollowed out. Therefore, the gears 13 and 14 are inside the movement front case 8 and the movement rear case 9.
, the iron core lO and the coil 11 are assembled to form the mechanical part A.
By attaching it to the dial plate 1, the circuit components of the dial plate 1 are housed in the mechanical part A.

The connection between the coil 11 and the output of the integration path 3 is made by adding some slack to the wire, and then attaching the dial plate 1 to the machine part A' after attaching it to the cow.
Alternatively, when the mechanical part A is attached to the dial plate 1 using a terminal board, it may be brought into contact with the pattern of the dial plate 1. The output of the integrated circuit 3 is, for example, 3
Since an output having a constant pulse width is generated every 0 seconds, a current flows through the coil 11 alternately.

One end of the iron core 10 is bent inward in a V-shape, and a rotor 12 is disposed between it and the other end. The rotor 12 is magnetized into two poles. The gaps a, b, and c between the rotor 12 and the iron core 10 are a (b (c).

Therefore, when current flows through the coil 11, the rotor 12 rotates in one direction.

FIG. 5 is an enlarged view of the central portion, and FIG. 6 is a perspective view of the hour and minute hands. 15 is a minute hand shaft, which is fixed to the minute wheel 14. Reference numeral 16 is a minute hand pushbutton, which is press-fitted and fixed onto the minute hand shaft 15. 17 is a minute hand, and 18 is a time. The minute hand bushing 16 consists of an eccentric cam 16a, a protrusion 16b, and a collar 16c, and the protrusion 16b engages with the notch 17a of the minute @I17.

The eccentric cam 16a engages with the center hole 18a of the hour hand 18.

The hour hand 18 is provided with an internal gear 18b having 12 teeth, and the movement front case 8 is formed with a fixed gear 8b having 11 teeth concentrically with the minute hand shaft hole 8a. When the fixed gear 8b and the internal gear 18b mesh and the eccentric cam 16a rotates, the time 18 rotates by 1/12 when the minute hand rotates 1601 times. The minute hand 17 is the minute hand bushing 16.
There is some play between ff2 +j and the hour hand 18. For the direction of rotation, the protrusion 16b and the notch 1
7a, and can move forward and backward to some extent.

FIG. 7 is a sectional view of the entire watch. 19 is backward”-su,
20 is a front case, and 21 is a front cover.

The gap between the dial 1 and the front cover 21 may be the same as the thickness of the hour hand 118 and the minute hand 17 plus the thickness of the collar 16c (FIG. 5) plus some allowance.

In this way, the aluminum base surface 1a'li of the dial l made of an aluminum base printed board is used as the character display surface, and each circuit component is attached to the pattern surface, and the mechanical part A is attached so as not to overlap with the circuit components. Because I installed it, when it is thin J
You can make V money. Furthermore, since the dial plate l also serves as a circuit board, the number of parts and assembly steps are reduced. Furthermore, since the circuit part and the mechanical part can be separated, assembly is easy, and since the assembly is sealed after assembly, there is no need to worry about dust entering.

As described above, the thin watch of the present invention is provided with a dial made of an aluminum base printed board, the time is displayed on the aluminum base surface of the dial, circuit components are attached to the four foil surfaces, and the circuit components are Since the mechanical parts are arranged so that they do not overlap, the structure can be made thinner, the number of parts is small, and the number of assembly steps can be reduced.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a main part of an embodiment of the present invention, Fig. 2 is a partially cutaway plan view thereof, Fig. 3 is a partially enlarged view of the half plate 1), and an IT side view. Similarly, No. 511 is an exploded perspective view of the front part, No. 511 is a cross-sectional view of the central portion, FIG. 6 is a perspective view of the minute hand and time, and FIG. 7 is a cross-sectional view of the whole. DESCRIPTION OF SYMBOLS 1...Dial board, 1a...Aluminum base material, 1b...R layer, IC...Copper foil, 2...Crystal oscillator, 3...Integrated circuit, 7...Battery, 8...Movement front case, 9...Movement rear case, 1()...Iron core,]
1... Coil, 12... Rotor, 14... Minute hand shaft, 17... Minute hand, 18... Hour hand, 19... Rear case, 2()... Front case, A...・Mechanical part Figure 1 Figure 2 Figure 7 Figure 6

Claims (1)

[Claims] A thin watch with a dial made of an aluminum-based printed board, a time display on the aluminum-based surface of the dial, circuit components attached to the foil conductor, and mechanical components arranged so as not to overlap the circuit components. .