JPH076553Y2 - Digital clock time adjustment mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a time adjustment mechanism of a digital timepiece.

[Prior Art] Conventionally, in a time adjustment mechanism of a digital timepiece, for example, a liquid crystal panel, switches for mode switching and time adjustment are formed on one surface of a printed circuit board or one surface and an end surface. A member which is relatively slidable and non-rotatable is fitted to the correction shaft. The correction shaft is pulled to operate the mode switching switch, and the correction shaft is rotated to move the member. There was one that operated the switch for correction.

[Problems to be Solved] When a large number of switches are formed on one surface of a printed circuit board as in the above-described conventional configuration, they cannot be formed at positions overlapping with each other. Therefore, they must be formed side by side in a plane. Therefore, a large planar space is required, and there are design restrictions. Moreover, since an extra member is interposed, there is a problem that the structure becomes complicated accordingly.

The object of the present invention is to reduce the planar space to achieve compactness, to enable various operations with a single knob, to improve operability, to reduce the number of parts, and to achieve cost reduction. It is to provide a time adjustment mechanism of a digital clock capable of performing.

[Means for Solving the Problems] A feature of the present invention is that a circuit board 5 having wiring patterns on both sides is used, and the correction shaft 3 and the other surface are provided on one surface side (upward direction) of the circuit board. By arranging the moving body 6 on the side (downward) to reduce the planar space,
In order to enable such an arrangement, the moving body 6 has a protrusion.
6a is formed, and this protrusion is a through hole 5a in the shape of a long hole of this circuit board.
And the tip of the projection 6a is fitted into the recess 3a provided in the correction shaft 3, thereby connecting the correction shaft and the moving body 6. The fitting state between the tip of the protrusion 6a and the recess 3a follows the movement of the correction shaft 3 in the axial direction, and when the correction shaft rotates in the circumferential direction, the moving body is immovable. is there.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the support plate 1 and the other
A time adjustment mechanism, which will be described later, is provided between the two support plates 2, and the digital timepiece is provided at a predetermined position on the left side of the support plate 1 although not shown. The correction shaft 3 is supported by the bearing portions 1a, 2a and the bearing portions 1b, 2b of the support plates 1, 2 so as to be movable in the axial direction and rotatable in the circumferential direction. An operation knob 4 is connected to a protruding end of the correction shaft 3 from the support plates 1 and 2. The circuit board 5 is positioned at a predetermined position in parallel with the correction shaft 3 by the positioning pin 1c which is vertically provided from the lower surface of the support plate 1, and is fixed by the fixing screw 11 as shown in the second illustration. A movable body 6 is provided between the circuit board 5 and the support plate 1, that is, on the side opposite to the surface of the rotary substrate facing the correction shaft 3. A guide protrusion 6b is formed on the head of the moving body 6 in parallel with the correction shaft 3.
As shown in FIG. 3, the movable body 6 is movably fitted in the guide groove 1d of the support plate 1 and is movable in the axial direction of the correction shaft 3. The moving body 6 has a protrusion 6a protruding toward the correction shaft 3,
The protrusion penetrates a through hole 5a formed in the circuit board 5, and is inserted into the recess 3a formed in the correction shaft 3 with a gap in the axial direction. The through hole 5a is an elongated hole formed along the axial direction of the correction shaft 3. For this reason, the moving body 6 is
The movement of the correction shaft in the circumferential direction can be integrally followed, and the rotation of the correction shaft in the circumferential direction is allowed within a certain range (within the range in which the tip of the protrusion 6a is located in the recess 3a).

A pair of H-shaped sliding contact pieces 7A and 7B (second shown) for mode switching, which are slidable on the surface of the circuit board, are attached to the lower surface of the moving body 6. Can be selectively and elastically contacted with a wiring pattern (not shown) for mode switching provided on the upper surface of the circuit board 5 (the surface opposite to the surface facing the correction shaft 3). That is, the wiring pattern that conducts changes with the movement of the sliding contact pieces 7A, 7B, whereby the mode is switched, and any one of the time correction mode, the alarm correction mode, and the lock mode is selected.

The circuit board 5 has a fixed contact piece 8 for time adjustment and a pair of rocking contact pieces 9A, 9B for time adjustment which can be brought into contact with and separated from the fixed contact piece 8 on the surface facing the correction shaft 3, that is, the lower surface. (3rd illustration) is provided. Further, the correction shaft 3 is provided with a pair of operation arm portions 10A and 10B (third shown in the figure).
Is in the time adjustment position, the tip of the
Opposing 9A and 9B, this can be rocked.

In the second illustration, elastic arms 6c, 6d are formed on both upper and lower sides of the moving body 6, and the click projection 6 is formed in the middle thereof.
e, 6f are formed. A positioning projection 1e is projected from the support plate 1 at a position where the click projection 6e can be engaged. The positioning protrusion 1e is provided with a recess in the middle thereof, so that the click protrusion 6e can be engaged and positioned at three positions. The correction shaft 3 is formed with a collar portion 3b for preventing the bearing 2a from coming off.

The correction shaft 3 shown in the first and second positions is at the maximum withdrawal position, and the click projection 6e is engaged with the right side of the positioning projection 1e to be positioned. The time adjustment mode is selected by the sliding contact pieces 7A, 7B. It is in the state of being. That is, the correction shaft 3 is in the time correction position, and the operation arm portions 10A and 10B face the swinging contact pieces 9A and 9B. When the operation knob 4 is slightly rotated in the forward direction at this position, the correction shaft 3 is slightly rotated counterclockwise as shown in the third drawing, and the swinging contact piece 9A is pressed by the operation arm portion 10A. The rocking contact piece 9A is rocked to make elastic contact with the fixed contact piece 8. The time is advanced each time the oscillating contact piece 9A makes elastic contact with the fixed contact piece 8.
When the operation knob 4 is slightly rotated in the reverse direction, the correction shaft 3
Rotates slightly clockwise as shown in Fig. 3, and this time the operating arm
The rocking contact piece 9B is pressed by 10B, and the rocking contact piece 9B is rocked to make elastic contact with the fixed contact piece 8. The time is delayed each time the rocking contact piece 9B makes elastic contact with the fixed contact piece 8. In either case, if the operation knob 4 is kept turned, fast forward for time adjustment is performed.

When the operation knob 4 is slightly pushed in from the positions shown in the first and second illustrations, the elastic arm 6c bends and the click projection 6e becomes the positioning projection.
The correction shaft 3 is positioned by overcoming 1e one step and engaging with the intermediate recess. At this time, the alarm time adjustment mode is selected by the sliding contact pieces 7A, 7B. That is, since the correction shaft 3 is at the alarm time correction position, and the operation arms 10A and 10B face the swinging contact pieces 9A and 9B even at this position, by turning the operation knob 4 as described above, the alarm time is corrected. Can be modified. When the operation knob 4 is further pushed, the elastic arm 6c bends and the click projection 6e goes over the positioning projection 1e one step further, and engages with the left side thereof to position the correction shaft 3. In this case, sliding contact pieces 7A, 7B
The lock mode is selected by. In this position, the swinging contact pieces 9A, 9B cannot be operated by the operation arm portions 10A, 10B, and the protrusion 3c of the correction shaft 3 is located in the gap of the bearing portion 1a. Therefore, the operation knob 4 and the correction shaft 3 are It cannot rotate.

[Effect] In the time adjustment mechanism of the present invention configured as described above, the mode changeover switch and the time adjustment switch are formed on the upper and lower surfaces of the circuit board respectively, so that a planar space is provided. It can be small and compact.
Moreover, various operations such as mode switching and time correction can be performed by one operation knob, and operability can be improved. Furthermore, since the number of parts is small, cost reduction can be achieved.

[Brief description of drawings]

1 is a sectional view of a main part, FIG. 2 is a sectional view taken along line AA of FIG. 1,
FIG. 3 is a sectional view taken along the line BB in FIG. 1,2 ... Support plate, 3 ... correcting shaft, 3a ... recess, 4 ... operation knob, 5 ... circuit board, 5a ... through hole, 6 ... moving body, 6a ... projection, 7A , 7B ... Sliding contact for mode switching,
8 …… Fixed armature for time adjustment, 9A, 9B …… Rotating armature for time adjustment, 10A, 10B …… Operating arm.

Claims (1)

[Scope of utility model registration request] 1. A support plate (1, 2), a correction shaft (3), an operation knob (4) provided on the correction shaft, a circuit board (5), and a movable body (6). The correction shaft is provided with a recess (3a) and a pair of operation arms (10A, 10B), and the circuit board is provided with a through hole (5a) for time adjustment. Fixed contact piece (8) and a pair of rocking contact pieces (9A, 9B) for time adjustment are provided, and the movable body is formed with a protrusion (6a) and is used for mode switching. Dynamic contact pieces (7A, 7B) are provided, the correction shaft is supported by the support plate so as to be axially movable and circumferentially rotatable, and the circuit board is corrected by the support plate. The movable body is supported parallel to the axis, and the movable body is provided on the side of the circuit board opposite to the surface facing the correction axis so as to be movable in the axial direction of the correction axis. The through hole of the circuit board is an elongated hole formed along the axial direction of the correction shaft, the projection of the moving body penetrates the through hole of the circuit board, It is inserted in the recess of the correction shaft with a gap in the width direction so that the moving body can be integrally followed when the correction shaft moves in the axial direction, and the correction shaft can be circumferentially moved. Is allowed within a certain range, and the sliding contact piece for mode switching of the moving body can slide on the surface of the circuit board opposite to the surface facing the correction shaft. Yes, it is possible to selectively contact the wiring pattern for mode setting provided on this surface, the fixed contact piece for time adjustment is provided on the surface of the circuit board facing the correction axis, The pair of rocking contacts for time adjustment are opposed to the correction shaft on the circuit board. A time adjustment mechanism for a digital timepiece, characterized in that it can be brought into and out of contact with the fixed contact piece, and the pair of operating arms can operate each of the swinging contact pieces at a time adjustment position. .