JP3191035B2 - Clock machine body for daylight saving time - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clock mechanism for daylight saving time which can easily switch between daylight saving time display and standard time display.

[0002]

2. Description of the Related Art In general, a clock that supports daylight saving time advances the time by one hour from the time when daylight saving time is applied in summer (daylight saving time display), and returns to the original time display (standard time or winter time display) again in autumn. ) Is used as a generic term for those that have a means for moving the pointer necessary to return to ().

In the case of the analog type, the switching of the time display in such a watch that supports daylight saving time is conventionally performed manually by mainly using a handwheel without specially changing the watch mechanical body itself. It had been. On the other hand, recently, there has been applied a timepiece having a function of a world clock to a summertime-compatible clock mechanical body in which the hour hand is moved in one direction by an hour by pushing a push button. In addition, an electronic timepiece with the function of adjusting the time by inputting an electronic signal, and a watch mechanism that enables daylight saving by adopting an external signal input to move the hands and switch the time display. Have been.

[0004]

Among the above-mentioned prior arts, when the pointer is manually moved, the operation for switching is troublesome. In the case where the pointer is advanced by the push button, the pointer can be advanced only in a certain direction. Therefore, it is good to advance the pointer, but it is inconvenient to delay the pointer. The electronic timepiece requires a motor and an electronic circuit to move the hour and minute hands, and also requires a transmission mechanism to transmit rotation from the motor to the hands. Cause of high. In each of these conventional techniques, it may be difficult to determine whether the currently displayed time is in daylight saving time display or standard time display, and confusion may occur in time recognition.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an inexpensive daylight-saving timepiece which can easily switch between daylight saving time display and standard time display without using an expensive motor or electronic circuit.

[0006]

Means for Solving the Problems In order to achieve the above object, a timepiece body for daylight saving time according to the present invention is characterized by adopting the following configuration.

The hour hand gear and the hour hand pipe are formed by separate members, and they are connected to each other via a click mechanism while being fitted to the minute hand pipe, and the outer peripheral portion of the base of the hour hand pipe located on the front surface of the lower case. Is engraved with the tooth profile of the external gear. A switching lever for switching between daylight saving time display and standard time display is mounted at the center of the front of the lower case so as to be able to move up and down while covering both sides of the base of the hour hand pipe. Inside the side plate portion of the switching lever, there is provided a locking claw that meshes with the external gear of the hour hand pipe by the raising / lowering operation of the switching lever and rotates the hour hand pipe by a predetermined rotation angle. The switching lever is provided with a switching mechanism that can be stopped in a state where the display is switched between the daylight saving time display and the standard time display alternately .

The switching lever is provided with a daylight saving time display section which allows the user to visually recognize whether the display is in daylight saving time or standard time through a through hole provided in the dial of the clock.

[0009]

[Action] When the switching lever is pulled down and released in the state where the standard time is displayed, the locking claw provided on the switching lever is externally toothed on the outer peripheral portion of the base of the hour hand pipe. And the click part engraved on the inner peripheral part of the base of the hour hand pipe and the click claw provided on the cylindrical part of the hour hand gear are skipped, so that the hour hand gear does not rotate and only the hour hand pipe Is rotated clockwise by the rotation angle necessary to display daylight saving time, and then returned upward by the urging force of the coil spring, and the cam groove sliding pin is housed in the recess at the lower end of the heart-shaped cam groove. To stop in This stop position is in the state of daylight saving time display.

When switching from the daylight saving time display to the standard time display, when the switching lever is pulled down and released, the cam groove sliding pin escapes from the concave portion at the lower end of the cam groove, and moves along the cam groove by the urging force of the coil spring. Raise and raise the switching lever. In the upward movement of the switching lever, the locking claw is engaged with the external gear to rotate the hour hand pipe counterclockwise by a predetermined rotation angle, but the hour hand gear is rotated by the click operation of the click claw and the click portion. do not do. The switching lever is stopped in a state where the cam groove sliding pin is housed in the recess at the upper end of the cam groove. Thereby, the display is switched to the standard time display again.

When the display is switched between daylight saving time display and standard time display by the switching lever, the position of the switching lever changes, so that the switching lever is provided with a daylight saving time display, and a through hole is provided at the corresponding dial position. If this is done, it is easy to determine whether the current time display is in daylight saving time or standard time from the front of the dial.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a main part of a timepiece machine body according to the present embodiment. An outer frame is composed of an upper case 1 and a lower case 2 made of a plastic molded product, and an intermediate plate 3 is provided therebetween. A clock wheel train G, a clock motor M, and the like are provided inside the outer frame, and a pointer shaft S located at the center of the inside protrudes forward of the outer frame.

The watch wheel train G is composed of a driving wheel 4, a second hand wheel 5, an intermediate wheel 6, a minute hand wheel 7, an hour hand wheel 8, and a minute wheel 16 described later. The driving wheel 4 is supported by a protruding shaft provided on the upper case 1 and the middle plate 3, and the gear 4a
The second hand gear 5a of the second hand wheel 5 meshes with the pinion portion 4b. The second hand gear 5a is pivotally supported by a bearing recess formed in the upper case 1 and a projecting pipe portion 3a of the middle plate 3, and a second hand shaft 5b extending forward is press-fitted into the center of its rotation center. It is. An intermediate gear 6 of an intermediate wheel 6 is provided on a pinion 5c provided on the back side of the second hand gear 5a.
a is engaged with the intermediate wheel 6 and the kana portion 6b integrated with the intermediate wheel 6,
The minute hand gear 7a constituting the minute hand wheel 7 is engaged.

The minute hand gear 7a is pivotally supported near the base end of the minute hand pipe 7b via a well-known slip mechanism. The minute hand pipe 7b has a base 7c fitted into the protruding pipe 3a, and a distal end protruding forward of the lower case 2.

An hour hand gear 8 is rotatably fitted at an intermediate position of the minute hand pipe 7b and on the back side of the lower case 2. The hour hand gear 8 includes a gear portion 8a and a cylindrical portion 8b protruding to the front side, and a distal end portion of the cylindrical portion protrudes forward of the lower case 2. An hour hand pipe 9 having an inner periphery formed in a step shape is fitted into the minute hand pipe 7b and the cylindrical portion 8b of the hour hand gear 8.

As shown in FIG. 2, the gear portion 8 of the hour hand gear 8
Elastic pieces 8c, which are separated in an arc shape, are provided at three places at equal intervals on the arm portion located inside the portion a. A contact piece 8d is formed at the tip of each elastic piece 8c.
Each can elastically contact the inner surface of the lower case 2 (see FIG. 1). The cylindrical portion 8b has a pair of spring portions 8 separated from one side portion of the gear portion 8a in the middle of the height so as to be separated from each other.
e and 8e are provided at positions facing each other on the inner peripheral surface of the cylindrical portion 8b. Click claws 8f, 8f each having a semicircular outer portion are formed at the tip of each of the spring portions 8e, 8e.

As shown in FIG. 3, the hour hand pipe 9 is formed in a stepped shape with the base 9a having the largest diameter and the tip having the smallest diameter. The peripheral portion is provided with a click portion 9b formed of a plurality of triangular irregularities. Further, a tooth profile of the external gear 9c is formed on an outer peripheral portion of the base 9a. A portion from the inner end of the click portion 9b formed on the inner peripheral portion to the front end of the middle diameter portion is a fitting portion 9d for fitting to the cylindrical portion 8b of the hour hand gear 8, and from this end, the hour hand pipe 9 The inner peripheral portion up to the distal end portion is a fitting portion 9e with the minute hand pipe 7b.

Returning to FIG. 1, the timepiece motor M will be described. The motor M is housed in a motor mounting portion 3b formed on the middle plate 3, and the rotor 10 is
The rotor shaft 10a is rotatably fixed to the rotor shaft 10a so as to be integrally rotatable therewith. Rotor magnet 1
On the side of Ob, a stator and a coil wound around the stator (both not shown) are provided. Rotor 1
The rotor pinion 10c integral with the gear 0 is engaged with the drive gear 4 described above.

Next, a rotation mechanism for rotating the hour hand pipe 9 by a predetermined angle will be described. As shown in FIG. 4, a switching lever 11 having a substantially rectangular planar shape is attached to the center of the front surface of the lower case 2 so as to be able to move up and down.

As shown in FIG. 1, the switching lever 11 has a front side with a member projecting from both sides of a base 9a of the hour hand pipe 9 and a central portion thereof extending to a window 11a shown in FIG. Has become. At both upper and lower ends of the window 11a,
Guide grooves 11b and 11c are provided, and the switching lever 11 can be moved up and down by a guide pin (not shown) protruding from the front surface of the lower case 2 so as to fit into the guide grooves. At the lower end of the guide groove 11c, an engagement pin 11d that engages with the guide pin is provided, and by engagement of the guide pin and the engagement pin 11d,
The upward movement of the switching lever 11 is restricted.

On the outer side along the contact surface of the switching lever 11 with the lower case 2, pleats 11e having a predetermined length are provided to protrude outward. The holding claws 2b formed on the front surface of the lower case 2 (shown in FIG. 1) are engaged with these folds 11e, thereby slidably holding the switching lever 11 so as not to fall off. Window 1 of switching lever 11
An elongated groove 11f is formed parallel to 1a, and inside one side plate 11g (right side in FIG. 4) of this groove, when the switching lever 11 moves up and down, as shown in FIG. A locking claw 11h is provided which meshes with the external gear 9c of the hour hand pipe 9 and makes it rotatable by a predetermined angle.

As shown in FIG. 4, a switching mechanism is provided on the left side of the switching lever 11 so as to be able to stop in a state where the daylight saving time display and the standard time display are alternately switched. That is, a thin plate-like connecting portion 11i is formed integrally on the left side of the switching lever 11 so as to be swingable.
A cam groove sliding pin 11m is provided at the distal end of the coil spring 12 to bias the switching lever 11 upward (see FIG. 5).
(Shown). A spring hook portion 11j is provided at an intermediate position of the connecting portion 11i, and a cam groove sliding pin 11 is provided on a back surface of a disk-shaped engaging portion 11k formed at an upper end portion.
m is projected.

A known heart-shaped cam groove (not shown) is formed in the outer surface of the lower case 2. The cam groove is provided so that an upper end portion is a protruding portion and a lower end portion is a concave portion. A cam groove sliding pin 11m fits in the cam groove and is slidable. 11m cam groove sliding pins at the upper and lower ends of the cam groove
Is provided, and the cam groove sliding pin 11m is temporarily stopped at that position by being accommodated in the concave portion.

As shown in FIG. 5, the coil spring 12 includes a lower case 2, a switching lever 11, and a projecting spring hook 2g and a spring hook 11j provided above the cam groove of the lower case 2. It is attached in a state where the urging force of the pull works. As a result, the switching lever 11 is urged upward by the urging force of the coil spring 12, and the cam groove sliding pin 11m is accommodated in the concave portion formed at the upper end or the lower end of the cam groove, and is held at two positions. Has become possible.

As shown in FIGS.
The upper end of 1 has a length protruding to the upper side of the outer frame,
The protruding portion serves as a summer time display section 11n. The summer time display section 11n is bent forward (rightward in FIG. 5) near the upper side of the outer frame and is formed so as to be able to abut the dial receiver 14 of the timepiece body. The upper half of the summer time display section 11n is provided with a color code or a symbol indicating daylight saving time display, and the lower half is provided with a color code or a symbol indicating standard time display. A through-hole 14a is provided at a position corresponding to the dial receiver 14 with which the summer time display portion 11n is in contact, and a dial 19 shown in FIG. 7 is in contact with the front surface thereof and faces the through-hole 14a. The dial 19 is provided with a through hole 19a that allows daylight saving time display to be visually recognized from the front of the dial.

Returning to FIG. 1, the minute wheel and the hand wheel will be described. The minute wheel 16 is rotatably supported by a shaft protruding from the middle plate 3, and the gear 16a is meshed with the minute hand pinion 7d and at the same time the pinion 17a of the handwheel 17 is engaged.
And are engaged. In addition, the kana part 16b of the minute wheel,
It meshes with the hour hand gear 8. The needle turning device 17 has a disk-shaped needle turning knob 17b located on the outer surface of the upper case 1,
The cylindrical portion including 7 a is inserted into the hole of the upper case 1, and the tip is supported by the projection shaft of the lower case 2.

As shown in FIG. 4, a U-shaped string hook 11p is provided at the lower end of the switching lever 11, and an operation string 20 (shown in FIG. 7) is suspended therefrom. . FIG. 6 shows a state of the back of the timepiece body according to the present embodiment, in which the summer time display portion 11n of the switching lever 11 protrudes from the upper side of the outer frame, and the above-mentioned handwheel 17 is positioned near the lower side center. are doing. An optional stop lever 21 for arbitrarily starting and stopping the timepiece mechanical body is provided at the right central portion.

FIG. 7 shows an example of a clock for daylight saving time to which the present invention is applied. Time display characters are printed on the dial 19 in the same manner as a normal timepiece, and the above-described through-hole 19a for summer time display is provided above the center. As described above, the through hole 19a is
Communicates with the through hole 14a formed in the
The display of the summer time display section 11n can be visually recognized from the front of.

On the lower side of the outer frame, a daylight saving time switching string 20 is suspended, and a pulling knob 22 is attached to the end thereof. An hour hand 23 and a minute hand 24 are attached to a pointer shaft S protruding from the center of the front face of the dial 19, and a cover 25 is provided on the front face of the outer frame.

Next, the operation and operation method will be described.
As shown in FIGS. 5 and 6, when the switching lever 11 is in the raised position and the display is in the standard time, when the display is switched to the daylight saving time display, the string 20 in FIG. 7 is pulled down. At this time, the cam groove sliding pin 11m of the switching lever 11
When the cord was moved downward along the cam groove and released at the lower end thereof, the cam groove sliding pin 11m was elastically contacted with the concave portion at the lower end and stopped by the upward biasing force of the coil spring 12. State.

FIG. 8 is an explanatory view showing the relationship between the hour hand gear 8 and the hour hand pipe 9 and the locking claw 11h of the switching lever 11. As shown in FIG. FIG. 9A shows a state when the standard time is displayed, and the locking claw 11h is attached to the external gear 9c.
At rest above and without contact with it. At this time, the click claw 8f is engaged with the concave portion of the click portion 9b to position the hour hand pipe 9 at a predetermined position. FIG. 8B shows a state in which the switching lever 11 is being pulled down, and the locking claw 11h is engaged with the tooth profile of the external gear 9c and has almost reached the intermediate position. At this time, the click claw 8f is located at the vertex of the uneven portion of the click portion 9b against the urging force of the spring portion 8e. FIG. 3C shows a state in which the switching lever 11 is pulled down to the lower end, and when the locking claw 11h moves down, the hour hand pipe 9 is moved.
Are rotated clockwise by a predetermined angle. At this time, the click claw 8f is engaged with the concave portion of the click portion 9b to keep the rotation angle of the hour hand pipe 9 constant. In this manner, the locking claw 11h of the switching lever 11 is modified by the click mechanism so as to engage with the concave portion of the click portion 9b of the hour hand pipe 9, so that the rotation angle of the hour hand pipe 9 is exactly 30 °. Become.

At this time, as shown by the two-dot chain line in FIG. 5, the switching lever 11 is stationary at the lowered position, and the daylight saving time display on the summer time display section 11n is displayed on the through-hole 14a and the through-hole 19a. It is displayed so as to be visible from the front of the plate 19.

Next, a case where the display is switched from the daylight saving time display to the standard time display will be described. When the string 20 is pulled down and released, the cam groove sliding pin 11m escapes from the concave portion at the lower end of the cam groove, and rises along the subsequent cam groove.
This upward movement is due to the upward biasing force of the coil spring 12, and as a result, the locking claw 11h
8c, the hour hand pipe 9 is engaged with the tooth profile of FIG.
Rotate in the order of (a), that is, counterclockwise. Also at this time, the rotation angle of the hour hand pipe 9 becomes just 30 ° by the action of the click portion 9b and the click claw 8f. The daylight saving time display section 11n also moves to the standard time position,
An indication to that effect is made from the through hole 19a. In this state, the switching lever 11 is stopped in a state where the cam groove sliding pin 11m is housed in the concave portion at the upper end of the cam groove.

In the state shown in FIG. 7, the standard time is displayed at 9:10.
When the knob 22 is pulled, the hour hand 23 moves to a position corresponding to 10:10 as indicated by a two-dot chain line. At the same time, when the switching lever 11 is pulled down, the daylight saving time display of the through hole 19a is also displayed.
The display changes from standard time display to daylight saving time display.

When the handwheel 17 is turned to correct the time, the turning force is transmitted from the kana 17a to the minute hand pinion 7d and the hour hand gear 8 via the minute wheel 16. At this time, since the minute hand gear 7a is attached to the minute hand pipe 7 via the slip mechanism, even if the minute hand pipe rotates, the minute hand gear 7a meshes with the intermediate wheel 6 having a large gear ratio, so that a large resistance is generated. Since the slip is caused by the force and the second hand shaft 5 does not rotate, only the minute hand and the hour hand can be timed. (See FIG. 1).

In this embodiment, since the present invention is applied to a wall clock, the switching lever is pulled down. However, the present invention is not limited to this, but is limited to a wall clock. It is also applicable to table clocks, alarm clocks and the like. In this case, the switching lever may be provided horizontally, and operated by pulling it in the lateral direction. It is also possible to provide the switching lever vertically and to operate it by pulling it up from above the timepiece frame.

[0037]

According to the present invention, the hour hand gear and the hour hand pipe are connected via a click portion and a click claw, and the hour hand pipe is rotated by a locking claw provided on a switching lever mounted on the lower case so as to be able to move up and down. Since it is possible, the switching operation between the daylight saving time display and the standard time display can be easily performed only by raising and lowering the switching lever. Also, by simply changing the hour hand gear and the hour hand pipe and adding a switching lever to a normal timepiece machine body, it is possible to cope with daylight savings time, so that it can be manufactured at low cost .

Since the daylight saving time display section provided on the switching lever is made visible through the through hole provided on the dial, it is convenient to immediately determine whether the current time display is daylight saving time or standard time.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a timepiece machine according to an embodiment.

2A is a plan view of an hour hand gear, and FIG.
FIG. 3 is a sectional view taken along line A.

3A is a plan view of an hour hand pipe, and FIG.
FIG. 4 is a cross-sectional view taken along line B.

FIG. 4 is an enlarged front view of a switching lever.

FIG. 5 is a side view of the timepiece machine according to the embodiment;

FIG. 6 is a rear view of the timepiece body according to the embodiment;

FIG. 7 is a front view illustrating a timepiece that supports daylight saving time to which the present invention is applied.

FIG. 8 is an explanatory diagram illustrating the operation of an hour hand gear, an hour hand pipe, and a locking claw.

[Explanation of symbols]

 2 Lower case 7b Minute hand pipe 8 Hour hand gear 8a Gear part 8b Tubular part 8e Spring part 8f Click claw 9 Hour hand pipe 9a Base of hour hand pipe 9b Click part 9c External gear 11 Switching lever 11g Side plate part 11h Locking claw 11i Connecting part 11m Cam groove sliding pin 11n Daylight saving time display section 12 Coil spring 19 Dial 19a Through hole

Claims (2)

(57) [Claims] 1. An hour hand pipe, which is fitted to a minute hand pipe with a tip of a cylindrical portion protruding from one surface of a gear part of the hour hand gear projecting forward of a lower case, and integrally rotating with the hour hand gear, Along with fitting into the minute hand pipe in front of the lower case, a click portion including a plurality of uneven portions is provided on an inner peripheral portion, and a tooth profile of an external gear is engraved on an outer peripheral portion. The end face of the base of the hour hand pipe is attached so as to be in contact with the front surface of the lower case, and the click part is formed at the tip of a spring part formed by cutting out the cylindrical part. When the click claw is engaged, rotation can be transmitted from the hour hand gear to the hour hand pipe.A switching lever for switching between daylight saving time display and standard time display is provided at the center of the front of the lower case. Covering both sides of the base It is mounted so that it can go up and down,
Inside the side plate portion of the switching lever, there is provided a locking claw that meshes with the external gear by rotating the switching lever and rotates the hour hand pipe by a predetermined rotation angle. A clock mechanism for daylight saving time, comprising a switching mechanism for enabling a stop in a state of alternately switching between daylight saving time display and standard time display. 2. The switching lever according to claim 1, wherein
Is made visible through a through hole in the dial of the watch.
Daylight saving time display section is provided.
Watch machine body for martime.