JPH0862346A - Pointer type clock - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a pointer-type timepiece that can improve installation accuracy by minimizing installation errors. [Structure] The protrusion 30 provided on the upper surface of the lower housing 20 to which the analog movement 26 is attached,
Each through hole 35 of the circuit board 21 and the upper housing 22
Is inserted to position the circuit board 21 and the upper housing 22 in the lower housing 20, and the letters are inserted in the mounting holes 31 provided on the upper surface of the protruding portion 30 of the lower housing 20 exposed from the through holes 35 of the upper housing 22. Board 2
The mounting feet 37 provided on the lower surface of the No. 3 were fitted to position the dial 23 with respect to the lower housing 20. Therefore, even if the upper housing 22 is interposed between the lower housing 20 and the dial 23, it is not affected by a mounting error due to the upper housing 22, so that the positional displacement between the analog movement 26 and the dial 23 is prevented. It can be minimized to improve the mounting accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer type timepiece.

[0002]

2. Description of the Related Art Conventionally, in a pointer type timepiece such as an electronic wristwatch, an analog movement is attached to a lower housing, an upper housing is attached to an upper surface of the lower housing via a circuit board, and a dial is attached to an upper surface of the upper housing. When installing, the pointer shaft of the analog movement is inserted into each of the pointer holes of the circuit board, the upper housing, and the dial so as to protrude above the dial, and the pointer is attached to the tip of the protruding pointer shaft. There is a structure in which this watch module is incorporated into a watch case by unitizing the above. In this pointer type timepiece, through holes are provided in a plurality of locations in the lower housing in order to unitize the timepiece module, and the mounting bosses provided on the lower surface of the upper housing are passed through the through holes in the lower board through the through holes. By press-fitting, the upper housing is attached to the lower housing, and mounting holes are provided at a plurality of locations on the upper surface of the upper housing, and the mounting feet provided on the lower surface of the dial are press-fitted into the plurality of mounting holes. , A dial is attached to the upper surface of the upper housing.

[0003]

However, in such a pointer type timepiece, since the upper housing is attached to the lower housing and the dial is attached to the upper housing, the space between the lower housing and the upper housing, and the upper portion of the housing. A mounting error will occur between the housing and the dial. Therefore, there is a problem that the positional displacement between the analog movement and the dial plate is increased due to the presence of the upper housing, the mounting accuracy is reduced accordingly, and the pointer hole into which the pointer shaft is inserted must be enlarged. It was The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pointer type timepiece capable of minimizing the mounting error and improving the mounting accuracy.

[0004]

In order to achieve the above object, the present invention is a lower housing having a plurality of protrusions formed on its upper surface and mounting holes provided on the upper surfaces of the plurality of protrusions. And an upper housing which is arranged on the upper side of the lower housing and has a plurality of through holes into which the plurality of protrusions are inserted, and an attachment which is arranged on the upper surface of the upper housing and is fitted into each mounting hole of the plurality of protrusions. It is characterized by including a dial provided with feet and an analog movement attached to the lower housing, and having a pointer shaft penetrating the upper housing and the dial and projecting above the dial.

[0005]

According to the present invention, the upper housing is positioned in the lower housing by inserting the through hole of the upper housing into the protruding portion of the lower housing, and the protruding portion of the lower housing exposed from the through hole of the upper housing is disposed. By fitting the mounting feet of the dial into the mounting holes,
Since the dial arranged in the upper housing is positioned with respect to the lower housing, even if the upper housing is interposed between the lower housing and the dial, it is not affected by the mounting error due to the upper housing, Therefore, the positional displacement between the analog movement and the dial can be minimized, which improves the mounting accuracy and eliminates the need for enlarging the pointer hole into which the pointer shaft is inserted as in the conventional case.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an electronic wrist watch will be described below with reference to FIGS. In FIG. 1, reference numeral 1 is a synthetic resin watch case. A rotary bezel 3 made of synthetic resin is rotatably attached to the upper outer periphery of the wristwatch case 1 through an O-ring 2 in a range of 0 to 90 °. This rotating bezel 3 has a watch glass 4
Is installed. A watch module 5 is housed in the wristwatch case 1, and a back cover 7 is attached to a lower portion of the wristwatch case 1 via an O-ring 6.

The clock module 5 is, as shown in FIG.
Liquid crystal cell 10 for digital display, interconnector 1
1, a parting member 12, and an analog unit 13 for analog display, which are built into the wristwatch case 1 by a built-in method. The liquid crystal cell 10 is
TN is inserted between a pair of upper and lower transparent glass substrates with a sealing material.
It has a structure in which a (twisted nematic) type liquid crystal is sealed, and is supported above the analog unit 13 by an interconnector 11 while being electrically connected to a circuit board 21 of the analog unit 13 which will be described later.
In this case, the lower polarizing plate 14 is provided on the upper surface (also serving as the reflecting surface) of the dial 23, which will be described later, of the analog unit 13 located below the liquid crystal cell 10, and
On the lower surface of the watch glass 4 located above 0, the upper polarizing plate 1
5 are provided. Therefore, each time the rotary bezel 3 is rotated and the transmission axis of the upper polarizing plate 15 is rotated by 90 °,
A bright display state seen by both the digital display by the liquid crystal cell 10 and the analog display by the analog unit 13,
Switches to the dark display state where only the analog display can be seen. The parting member 12 is arranged on the outer peripheral portion between the liquid crystal cell 10 and the dial 23.

On the other hand, as shown in FIG. 1, the analog unit 13 includes a lower housing 20 made of synthetic resin, a circuit board 21 arranged on the upper surface of the lower housing 20,
An upper housing 22 made of synthetic resin arranged on the circuit board 21, a dial 23 arranged on the upper housing 22, and a pointer shaft 24 attached to the lower housing 20 so that the pointer shaft 24 is arranged on the circuit board 21 and the upper housing 22. , And an analog movement 26 that is inserted into each pointer hole 25 of the dial 23 and projects above the dial 23, and a main plate 27 that is arranged on the lower surface of the lower housing 20.

The lower housing 20 is provided with a movement storage portion 29 for storing the analog movement 26. A predetermined place on the upper surface of the lower housing 20,
For example, at two positions, an intermediate position between "3 o'clock" and "4 o'clock" and an intermediate position between "9 o'clock" and "10 o'clock" as shown in FIG. The protruding portion 30 is formed. Then, mounting holes 31 are provided on the upper surfaces of the respective protruding portions 30. Further, as shown in FIG. 1, a positioning boss 32 is formed on the upper surface of one end side of the lower housing 20, and a screw 33 is formed on the other end side.
Is provided with a stupid hole 34 for insertion. Circuit board 21
Further, the upper housing 22 is provided with two through holes 35 into which the respective protrusions 30 are inserted. In addition, a predetermined portion of the upper housing 22, for example, "2" as shown in FIG.
As shown in FIG. 5, tongue-shaped springs whose tips are elastically contacted with the upper surface of the circuit board 21 are provided at four positions near the respective positions of “hour”, “4 o'clock”, “8 o'clock”, and “10 o'clock”. The part 36 is formed by cutting and raising. As shown in FIGS. 3 and 4, the lower surface of the dial plate 23 is provided with two mounting feet 37 that are fitted into the mounting holes 31 of each protruding portion 30.
The upper surface of the dial 23 is formed as a reflecting surface, and the lower polarizing plate 14 is provided on the upper surface. The analog movement 26 has a train wheel mechanism, and as shown in FIG. 1, a pointer 38 such as an hour hand and a minute hand is attached to the tip of a pointer shaft 24 protruding above the dial 23, and the pointer shaft 24
The hour wheel 40 is arranged on the outer periphery of the lower part of the wheel, and the hour wheel 40 is pressed by a pressing plate 41. Further, the base plate 27 is made of a metal plate such as stainless steel and is arranged on the lower surface of the lower housing 20 as shown in FIG.
a lower hook 42 engaging with a and the upper housing 2
Upper hooks 43 that engage with the protruding portions 22a on the second side surface are provided so as to project upward.

When assembling such an analog unit 13, first, as shown in FIG. 4, the analog movement 26 is arranged in the movement accommodating portion 29 of the lower housing 20, and the protrusion 30 on the upper surface of the lower housing 20. By inserting the through holes 35 of the circuit board 21 and the upper housing 22 into the lower housing 20,
The circuit board 21 and the upper housing 22 are positioned and arranged on the upper surface of the. After this, as shown in FIG. 3, the mounting feet 3 of the dial 23 are inserted into the mounting holes 31 of the protrusions 30 of the lower housing 20 exposed from the through holes 35 of the upper housing 22.
7 is inserted, and the dial 2 is placed on the upper surface of the upper housing 22.
The dial 23 is positioned with respect to the lower housing 20 in a state where the dials 3 are arranged. Then, analog movement 2
The pointer shaft 24 of 6 includes the circuit board 21 and the upper housing 2.
2 and the dial 2 through the pointer holes 25 of the dial 23
3 will be projected above.

As shown in FIG. 5, the base plate 27 is arranged on the lower surface of the lower housing 20, the lower hooks 42 of the base plate 27 are engaged with the protrusions 20a of the lower housing 20, and the upper hooks of the base plate 27 are engaged. 43 is engaged with the protrusion 22 a of the upper housing 22. This allows
The circuit board 21, the upper housing 22, and the dial 23 are mounted on the lower housing 20 to which the analog movement 26 is mounted. At this time, as shown in FIG. 5, since the circuit board 21 is elastically pressed onto the lower housing 20 by the spring force of each spring portion 36 of the upper housing 22, the engagement of the hour wheel 40 is not disengaged by the circuit board 21. As described above, the holding plate 41 holds down the hour wheel 40. In this state, the pointer 38 is attached to the tip of the pointer shaft 24 protruding above the dial plate 23 so as to be parallel to the dial plate 23. At this time, since the upper housing 22 is supported above the circuit board 21 with a predetermined gap by the spring force of each spring portion 36, the inclination of the dial 23 is corrected and the pointer 38 is attached properly.

When incorporating the analog unit 13 into the wristwatch case 1, first, the wristwatch case 1 is assembled.
Is turned upside down so that the watch glass 4 is on the lower side. In this state, the liquid crystal cell 10 is arranged in the wristwatch case 1, the parting member 12 is mounted, and the interconnector 11 is arranged. Then, the positioning boss 32 provided on the lower housing 20 of the analog unit 13 is attached to the wristwatch case 1.
The analog unit 13 is positioned in the wristwatch case 1 by inserting it into the positioning hole 1a provided inside, and then the screw 3 is passed through the stupid hole 34 provided in the lower housing 20.
3 is screwed into the watch case 1. As a result, the analog unit 13 is assembled in the wristwatch case 1.
At this time, the liquid crystal cell 10 is pressed and fixed in the wristwatch case 1 by the analog unit 13 via the interconnector 11, and the character is set against the spring force of the spring portion 36 of the upper housing 22 shown in FIG. Since the plate 23 pushes down the upper housing 22, the upper housing 22 comes into close contact with the circuit board 21.

As described above, in this electronic wrist watch, by inserting the through holes 35 of the circuit board 21 and the upper housing 22 into the projecting portion 30 of the lower housing 20,
The upper housing 22 is positioned on the lower housing 20 via the circuit board 21, and the protruding portion 30 of the lower housing 20 exposed from the through hole 35 of the upper housing 22.
By inserting the mounting feet 37 of the dial 23 into the mounting holes 31 of the dial 23 arranged on the upper housing 22,
Is positioned with respect to the lower housing 20, so that even if the upper housing 22 is interposed between the lower housing 20 and the dial 23, it is not affected by a mounting error due to the upper housing 22. The positional deviation between the movement 26 and the dial plate 23 can be minimized, which improves the mounting accuracy and eliminates the need for forming a large pointer hole 25 into which the pointer shaft 24 is inserted as in the conventional case.

Further, in this electronic wrist watch, since the spring portion 36 for elastically pressing the circuit board 21 is formed at a predetermined portion of the upper housing 22, the circuit board is placed on the lower housing 20 to which the analog movement 26 is attached. When the 21, the upper housing 22, and the dial 23 are attached, each spring portion 36 of the upper housing 22 is attached.
The circuit board 21 is elastically pressed onto the lower housing 20 by the spring force of the presser plate 41, and the presser plate 41 is thereby moved.
It is possible to press 0, so that the engagement of the hour wheel 40 can be prevented from being disengaged. Also, dial 2
When the pointer 38 is attached to the tip of the pointer shaft 24 protruding to the upper surface side of the reference numeral 3, the upper housing 22 is supported above the circuit board 21 with a predetermined gap by the spring force of each spring portion 36. The tilt of the dial 23 can be corrected so that the dial 23 is not tilted with respect to the upper housing 22, and thus the pointer 38 can be attached with high accuracy.

In the above-mentioned embodiment, the case where the invention is applied to the electronic wrist watch is described, but the invention is not limited to this, and can be widely applied to travel watches, table clocks, wall clocks and the like.

[0016]

As described above, according to the present invention, the upper housing is positioned in the lower housing by inserting the through hole of the upper housing into the protruding portion of the lower housing. By inserting the mounting feet of the dial into the mounting holes of the exposed protruding portion of the lower housing, the dial arranged in the upper housing is positioned with respect to the lower housing. Even if the upper housing is interposed, it is not affected by the mounting error due to the upper housing, and therefore the positional deviation between the analog movement and the dial can be minimized, which improves the mounting accuracy. It is not necessary to enlarge the pointer hole into which the pointer shaft is inserted as in the conventional case.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an embodiment in which the present invention is applied to an electronic wrist watch.

FIG. 2 is a plan view of the analog unit shown in FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an exploded sectional view of a main part of FIG.

5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 20 Lower Housing 22 Upper Housing 23 Dial Plate 24 Pointer Shaft 25 Pointer Hole 26 Analog Movement 30 Projection 31 Mounting Hole 35 Through Hole 37 Mounting Feet

Claims (1)

[Claims] 1. A lower housing having a plurality of protrusions formed on an upper surface thereof and mounting holes provided on the upper surface of the protrusions, and the plurality of protrusions arranged on an upper side of the lower housing. An upper housing in which a plurality of through holes to be inserted are formed, a dial arranged on an upper surface of the upper housing and provided with a mounting leg to be fitted into the mounting hole of the protrusion, and mounted to the lower housing, An analog movement in which a pointer shaft penetrates through the upper housing and the dial and projects above the dial, the pointer-type timepiece.