JPS6249593B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wall clock type alarm clock.

Conventional alarm clocks set the time of alarm sound generation using only a guide hand that rotates once every 24 hours or 12 hours, so there was a problem in that the guide cannot be set accurately down to the minute. Therefore, the present applicant has proposed an alarm clock that improves the accuracy of the setting by providing separate minute and hour indicators so that minute and hour settings can be made separately. However, if the minute indicator wheel and hour indicator wheel are operated by dedicated operating means, there are problems in that the operation becomes troublesome and the operating means spoil the appearance.

Conventionally, a table clock-type alarm clock has been proposed in which the minutes and hours can be set separately (Japanese Patent Application Laid-open No. 57674/1983). However, in this conventional example, since the reference operating lever is operated by sliding, it is inconvenient to operate when applied to a wall clock. Especially for wall clocks with a large dial and a main body case behind it, if a sliding guide control lever is installed on the main body case, the dial will get in the way and be difficult to reach, and you will have to remove the clock from the wall. Cannot perform operations. In addition, if the guide control lever protrudes from the front of the dial, it will spoil the aesthetic appearance.

Therefore, an object of the present invention is to provide a minute indicator wheel and an hour indicator wheel separately so as to improve the accuracy of the indicator, while allowing the minute indicator wheel and hour indicator wheel to be operated with a single indicator rotary shaft. To provide an alarm clock which is easy to perform a guide setting operation and has an excellent appearance.

The alarm clock of this invention has a minute indicator wheel and an hour indicator facing the front inside a wall-hanging case body, which are arranged symmetrically side by side with their rotational axes parallel to each other, and the setting of these minute indicator wheel and hour indicator wheel. A switch circuit is provided to close the power supply circuit of the alarm sound generator at a time corresponding to the angle, and ratchets with opposite engagement directions are provided on the minute indicator wheel and hour indicator wheel respectively, and a switch circuit is provided between these ratchets. A feed wheel having a pair of arms and a bevel gear located at and engaging with both ratchets, respectively, is provided so as to be rotatable in forward and reverse directions within a certain angle range about a rotation axis parallel to the minute indicator wheel and the hour indicator wheel, A bevel gear whose tip end meshes with the bevel gear is disposed in the center between the minute indicator wheel and the hour indicator wheel, extending directly below, and projects downward from the hole in the case body to rotate the feed wheel. It is equipped with a reference turning axis.

Due to this configuration, minute setting and hour setting can be performed separately, and guide setting can be performed with high precision. Moreover, the minute setting and hour setting can be performed separately by simply changing the direction of rotation using a single guide shaft. Therefore, the guideline setting operation is easy and the appearance can be improved. In particular, a guide shaft is used, and this guide shaft protrudes downward from the case body, so even if the dial is large and the case body is provided on a part of the back, the dial will not get in the way. You can set the guideline while hanging it on the wall. In this case, the minute indicator wheel and hour indicator wheel are installed symmetrically, and the indicator wheel is located in the center between them, so when operating while pushing up the indicator indicator, the center of gravity is used to push up the indicator wheel. The main body of the case does not tilt and is easy to operate. Furthermore, the indicator operation means does not protrude from the surface of the dial, giving it a good appearance. The guide shaft and feed wheel are meshed with bevel gears, so the transmission mechanism is simple.

An embodiment of the invention is shown in FIGS. 1 to 9. This embodiment is applied to a wall clock.
In Figure 1, 1 is a crystal clock movement, 2
is an alarm mechanism section that constitutes a guide section. The timepiece movement 1 is fixed to the alarm mechanism section 2, and rotation from a constant speed rotating section of the timepiece movement 1 is transmitted to the alarm mechanism section 2 as described later. That is, the timepiece movement 1 has a minute wheel 4, and a hole 7 is provided in the movement case 6 in correspondence with the minute wheel 4. and,
By fixing the alarm mechanism section 2 and the timepiece movement 1, the pinion section 8a of the first transmission wheel 8 of the alarm mechanism section 2 is inserted through the hole 7 and meshes with the minute wheel 4.

To explain the alarm mechanism section 2, in FIGS. 3 to 5, 10 is a case body, 11 is a second transmission wheel that meshes with the first transmission wheel 8, and 12 is a second transmission wheel.
A 1-hour car is driven by a transmission wheel 11, 13 is a third transmission car, and 14 is a 24-hour car. The rotation of the 1-hour wheel 12 is intermittently transmitted to the 24-hour wheel 14 via the third transmission wheel 13. That is, the hour wheel 12 has two teeth 15 (FIGS. 7 and 8) locally on a part of its outer periphery. Further, the third transmission wheel 13 is formed in two stages, and the upper stage gear portion 13a has 12 teeth and meshes with the teeth 15 of the hour wheel 12. The number of teeth of the lower gear portion 13b of the third transmission wheel 13 is 48, and 24
It meshes with the hour wheel 14. The number of teeth on the 24-hour wheel 14 is 120.
It is. Therefore, one revolution of the wheel 12 in one hour is 24
The hour wheel 14 rotates 1/24 revolution. Another 1 hour car 12
has an integral locking disk 12a having the same outer diameter as the two teeth 15, and when this locking disk 12a enters between the teeth of the upper gear portion 13a of the third transmission wheel 13, The third transmission wheel 13 is prevented from rotating except when the 24-hour wheel 14 is carried up. Carrying is done by the minute hand (not shown)
It takes place between 55 and 60 minutes.

The 1-hour indicator 12 and the 24-hour indicator 14 are respectively installed on support shafts 16 protruding from the case body 10, and a minute indicator 17 and an hour indicator 18 are provided at the small diameter portions of the tips of these support shafts 16. and will be installed respectively. That is, a minute indicator 17 and an hour indicator 12 are installed coaxially, and an hour indicator 18 and a 24-hour indicator 14 are installed coaxially.
and are installed coaxially. The minute guide car 17 has the second
As shown in the figure, numbers 0, 5, ..., 55 are displayed on the surface, and numbers 1, 2, 3, ..., 24 are displayed on the hour indicator wheel 18. The displayed numerals on the surfaces of the minute indicator wheel 17 and hour indicator wheel 18 are exposed through a viewing window provided on a clock dial (not shown).
As shown in FIG. 6, sliding contact pieces 19 and 20 projecting from the upper and lower surfaces are attached to the 1-hour indicator 12 and the 24-hour indicator 14. These sliding contact pieces 19, 20 are made of conductive plate springs. Further, conductive rings 21 and 22 are fixed to the back surfaces of the minute indicator wheel 17 and the hour indicator wheel 18. The conductor rings 21 and 22 are arranged at 1 in the circumferential direction.
It has protruding pieces 21a and 22a extending inward at certain points. The protruding pieces 21a, 22a are the sliding contact pieces 19, 19', 2 of the 1-hour wheel 12 and the 24-hour wheel 14.
0 and 20' constitute a minute switch 23 and an hour switch 24, respectively. 29 is a connection plate, and both ends thereof are conductor rings 21 and 22, respectively.
always be in contact with. 1 hour car 12 and 24 hour car 1
Fixed contacts 25 and 26 are located below the case body 1.
It is fixed at 0. These fixed contacts 2
5 and 26 have annular portions concentric with the support shafts 16a and 16b, and are connected to the 1-hour car 12 and the 24-hour car 1.
The lower sliding contact pieces 19', 20' of 4 are always in contact with the annular portions of the fixed contacts 25, 26. Therefore, from the one fixed contact 25 to the sliding contact piece 1
9', 19, conductor ring 21, connection plate 29, conductor ring 22, sliding contact pieces 20, 20', and the other fixed contact 26, forming a switch circuit.
An alarm sound generator and a battery 28 are interposed in the circuit between the fixed contacts 25 and 26.

The guideline setting mechanism will be explained. As shown in FIGS. 2 and 3, the minute indicator 17 and hour indicator 18 each have a ratchet 3 with 24 pawls on the back.
0,31. These ratchets 30 and 31 are formed with claws facing in opposite directions. Incidentally, these ratchets 30 and 31 may be formed by providing a large number of notches on the outer periphery of a disc. 32 and 33 are minute indicator car 17 and hour indicator car 1.
This is a positioning lever for holding the rotation angle of No.8. The positioning levers 32 and 33 are rotatably attached to pins 32a and 33a protruding from the case body 10, and are constantly pressed against the latches 30 and 31 by the urging force of a torsion coil spring (not shown). There is. 36 is a guide shaft that is rotatably inserted into the hole 37 of the case body 10, and the tip thereof is connected to the bevel gear 36.
It is formed in a. 38 is a feed wheel, and a bevel gear 39 meshes with the bevel gear 36a of the guide shaft 36.
and four arms 40a to 4 that engage with the ratchets 30, 31 of the minute indicator 17 and hour indicator 18.
It has 0d. These four arms 40a~
40d are provided at equal angular intervals. 38a is a support shaft of the feed wheel 38.

Next, the operation of this alarm clock will be explained. If you set the minute indicator 17 and hour indicator 18 to any rotation angle, the 1-hour indicator 12 and the 24-hour indicator 1
4 rotates over time, the sliding contact pieces 19, 20 of the hour indicator 12 and the 24 hour indicator 14 rotate as the minute indicator 17 and hour indicator 18 rotate.
Projecting pieces 21a, 22a of conductor rings 21, 22
come into contact with. When the protruding pieces 21a, 22a of both the minute indicator 17 and the hour indicator 18 come into contact, both fixed contacts 25, 26 connect to the connecting plate 29.
The wake-up sound generator 27 generates the wake-up sound.

The guideline setting operation will be explained. Standard turning shaft 36
to move the feed wheel 38 to one side (in the direction of arrow A in Fig. 3).
When it is rotated, the arm 40a of the feed wheel 38 and the ratchet 31 of the hour indicator wheel 18 engage, and the hour indicator wheel 18 is advanced by one pitch of the claw of the ratchet 31. At this time, the other arm 40b of the feed wheel 38
The tip of the minute indicator wheel 17 engages with the claw of the ratchet 30 of the minute indicator wheel 17, and the minute indicator wheel 17 moves slightly, but when the engagement disengages, the minute indicator wheel 17 is biased by a torsion coil spring (not shown). It is pushed by the positioning lever 32 and returned to its original position. That is, the hour indicator wheel 18 can be rotated by turning the guide shaft 36 in the direction B in FIG. By turning the guide shaft 36 in the opposite direction, the minute indicator wheel 17 can be rotated while the hour indicator wheel 18 remains stationary. This operation is illustrated in FIG. 9. That is, when the feed wheel 38 is turned in the direction A, the hour indicator wheel 18
is sent by an angle of α. At this time, the angle between the line connecting the peak of the positioning lever 33 and the center of the hour indicator wheel 18 and the line connecting the peak of the pawl of the ratchet 31 and the center of the hour indicator wheel 18 is defined as α'. Here, the arm 4 of the feed wheel 38 is adjusted so that α>α'.
By selecting the lengths 0a to 40d and the stopping position of the pawl of the ratchet 31, the ratchet 31 can be moved by the slope of the positioning lever 33 and the biasing force of the torsion coil spring.
will be sent one pitch. At this time, the minute indicator wheel 17 is turned by an angle of β, but β<
If β' is set, the indicator wheel 17 turned by the angle β will be returned to its original position by the action of the positioning lever 32 and the torsion coil spring. In addition,
α'=β'=(1 pitch of claws of ratchets 30 and 31)×1/2. In this way, only the hour indicator wheel 18 can be rotated. By rotating the feed wheel 38 in the opposite direction, only the minute indicator wheel 17 can be rotated and the hour indicator wheel 18 can be kept stationary, in the exact opposite direction.

In this way, minute settings and hour settings can be made separately, so guide settings can be made with high precision down to the minute. Moreover, by simply changing the direction of rotation using the single guide shaft 36, the minute guide wheel 1 can be rotated.
7 and the hour indicator wheel 18 can be operated separately,
This has the effect of making the guideline setting operation easier and faster. In particular, since the guide shaft 36 protrudes downward from the case body 10, for example, even if the dial is large and the case body 10 is provided on a part of the back, the dial does not get in the way and can be placed on the wall. Estimated setting operations can be performed while the device is hung. In this case, the minute indicator wheel 17 and the hour indicator wheel 18 are provided symmetrically,
In addition, since the guide shaft 36 is located at the center between the two, when operating the guide shaft 36 while pushing it up, the case body 10 is not tilted because it is pushed up at the center of gravity, making the operation easy. Moreover, since the guide operating means does not protrude from the surface of the dial, and only one guide shaft 36 protrudes downward, the appearance is simple and clean. Standard turning shaft 36
Since the feed wheel 38 and the feed wheel 38 are meshed with each other by bevel gears, the transmission mechanism is simple. Furthermore, since the minutes indicator wheel 17 and the hour indicator indicator 18 are displayed digitally using numbers, there is an advantage that they are easy to read apart from the hour and minute hands that are displayed using scales. In other words, in the past, a reference scale was provided on the clock dial to indicate the time,
A model with a guide hand coaxial with the minute and second hands is used, but the clock scale is a 12-hour scale, whereas the guide scale is a 24-hour scale, making it difficult to read. There was a problem. However, as in this example, the guideline display is a digital display,
If the time display is a scale display, there is an advantage that even if one display is a 24-hour display and the other is a 12-hour display, it is easy to distinguish between the two. In addition, the minute guide car 1
7 and the hour indicator wheel 18, the thickness of the entire timepiece can be made thinner than in a case where indicator hands are provided on the minute indicator wheel 17 and the hour indicator wheel 18.

Although the above embodiment has been explained in the case of a 24-hour system, in the case of a 12-hour system, the number of pawls of the ratchets 30 and 31 for both the hour indicator 18 and the minute indicator 17 is set to 12.
1 piece.

10 to 15 show a second embodiment of the invention. This embodiment is intended to prevent the switch from being turned on twice, as will be described later. That is, in the first embodiment, the connection plate 29 is always in contact with the conductor ring 21 of the minute indicator wheel 17, but in the second embodiment, the contact piece 21b is attached to the conductor ring 21'.
are provided at equal intervals, and the connecting plate 29 is in contact with the contact piece portions 21b. The number of contact pieces 21b is 12, so the connection plate 29 comes into contact with a different contact piece 21b every 5 minutes. Minute car 17
The numbers are shown every 5 minutes. The divided positioning by the ratchet 30 (FIG. 3) of the minute indicator wheel 17 and the positioning lever 32 is divided into 24 equal parts as in the first embodiment. Therefore, the minute guide car 17
Positioning is every 2.5 minutes. The other components are the same as those in the first embodiment.

The operation of the second embodiment will be explained. first,
The unresolved problems of the first embodiment will be explained. now,
If the approximate setting is 5:30, as shown in Figure 11.
24-hour car 14 is between 4:55 and 5:00.
After 1/24 rotation, the protruding piece 22a of the conductor ring 22 of the hour indicator wheel 18 and the sliding contact piece 20 come into contact. That is, the hour switch 24 is turned on. 1 hour car 12
Since the minute switch 23 rotates once per hour, the protruding piece 21a of the minute switch 23 and the sliding contact piece 19 come into contact with each other when the minute switch 23 reaches the 30 minute position, and are turned on. Incidentally, the time in the ON state is the time during which the sliding contact piece 20 passes through the width l (FIG. 6) of the protruding piece 21a. Then, as shown in FIG. 11, an alarm sound is generated at 5:30 when both the hour switch 24 and minute switch 23 are turned on. In this case, there is no problem with the switch turning on twice.

Next, if the approximate setting is 5:57.5, the result will be as shown in Figure 12. That is, at 5:57.5, the ON states of the hour switch 24 and minute switch 23 match, and an alarm sound is generated. However, one hour before that, at 4:57.5, the hour switch 24
If there is a manufacturing difference between the time when the hour switch 24 turns ON and the time when the minute switch 23 turns ON because the time width t (Fig. 13) is narrow, the ON state of the hour switch 24 and the time when the minute switch 23 turns ON are An alarm sound may occur when the following conditions overlap. In other words, switch 2
The problem of prescription arises. As mentioned above, the hour reference car 18 performs positioning 24 hours corresponding to 1 to 24 hours.
The minute indicator wheel 17 is also divided into 24 equal parts so that it is fed by the same feed wheel 38 as the hour indicator wheel 18. Therefore, the standard setting is 2.5 minute intervals. However, when the setting is set to 2.5 minutes, the time width t in FIG. 13 becomes smaller, and there is a possibility that the switch may be turned on twice. Therefore, time accuracy of the switch ON timing is required. This problem can be solved if the guide setting is set to 5 minute intervals, but if the digital display of the minute indicator 17 is simply set to 5 minute intervals, the minute indicator 17 will be positioned at 2.5 minute intervals, which may result in incorrect operation. The guideline is sometimes set at the 57.5 minute position, and in this case, the problem of turning the switch on twice occurs.

In contrast, in the second embodiment, contact pieces 21b are provided at equal intervals on the conductor ring 21' of the minute indicator wheel 17, and the connecting plate 29 is brought into contact with the contact pieces 21b. Therefore, the guideline setting is 0 minutes, 5 minutes.
The connection plate 29 comes into contact with the contact piece 21b only at the time of 2.5 minutes, 7.5 minutes, 12.5 minutes, 10 minutes, ..., 55 minutes.
At the time of minutes, 17.5 minutes, ..., 57.5 minutes, connection plate 2
9 is located between the contact pieces 21b and is not connected.
That is, the setting of the minute indicator wheel 17 is performed every two pitches of the pawl of the ratchet 30, and is set every five minutes. Even if the minute indicator wheel 17 is accidentally left in position during that time, no alarm sound is generated. To explain this with reference to Fig. 13, it is not possible to set the minute switch 23 to turn on at the 57.5 minute position, but the minute switch 23 turns on at the 55 minute position as shown by the chain line.
A guideline is set to do so. Therefore, the time width is large, and the time accuracy of the switch ON timing is not required as much as in the first embodiment. Therefore, assembly becomes easy.

FIGS. 14 and 15 show still other embodiments. That is, twelve protrusions 41 are provided at regular intervals on the lower surface of the minute indicator wheel 17 surrounding the conductor ring 21, and a contact piece 29a that is lifted by the protrusions 41 is provided on the connecting plate 29. With this configuration, the connection plate 29 is lifted up by the protrusion 41, thereby eliminating contact with the conductor ring 21. This time is 2.5 minutes, 7.5 minutes, 12.5 minutes,
17.5 minutes..., 57.5 minutes. Therefore, in this case as well, the standard interval of the minute indicator car 17 is every 5 minutes,
As in the case of the second embodiment, there is no problem of the switch being turned on twice, and high time accuracy of the switch timing is not required. The rest is the same as the first embodiment.

As described above, in the alarm clock of the present invention, the minute indicator wheel and the hour indicator wheel are arranged side by side with their rotational axes parallel to each other, and the alarm clock is configured to alarm at a time corresponding to the set angle of the minute indicator wheel and the hour indicator wheel. A switch circuit for closing the power supply circuit of the sound generator is provided, ratchets having opposite engagement directions are integrally provided on the minute indicator wheel and the hour indicator wheel, and a switch circuit is provided between the ratchets and connected to both ratchets. Since a feed wheel with mating arms is provided and a guide shaft is provided to rotate the feed wheel, the minutes and hours can be set separately and the guide can be set with high precision. Furthermore, the minute setting and hour setting can be performed separately by simply changing the direction of rotation using a single guide shaft. Therefore, the guideline setting operation is easy and the appearance can be improved. In particular, since the guide shaft protrudes downward from the case body, for example, even if the dial is large and the case body is installed on a part of the back, the dial will not get in the way and can be hung on the wall. You can perform guideline setting operations. In this case, the minute indicator wheel and hour indicator wheel are installed symmetrically, and the indicator wheel is located in the center between them, so when operating while pushing up the indicator indicator, the center of gravity is used to push up the indicator wheel. The main body of the case does not tilt and is easy to operate. Furthermore, the indicator operation means does not protrude from the surface of the dial, giving it a good appearance. Since the guide shaft and feed wheel are meshed with each other through bevel gears, the transmission mechanism is simple.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an embodiment of the present invention shown from the back side, Fig. 2 is an exploded perspective view of the embodiment shown from the front side, Fig. 3 is a front view of the inside of the alarm mechanism, and Fig. 4 is Figure 3 is a cross-sectional view, Figure 5 is the 3rd cross-sectional view.
6 is an exploded perspective view showing the relationship between the standard car, 1-hour car, 24-hour car, etc.
Figures 7A and B are a plan view and a perspective view showing the relationship between the 1-hour car and the third transmission wheel, Figure 8 is a partial perspective view of the 1-hour car from the back, and Figure 9 is the same. An explanatory diagram showing the dimensional relationship between the minute indicator car and hour indicator car, etc., Fig. 10 is a bottom view of the minute indicator car and hour indicator car in another embodiment, and Figs. 11 to 13 are the first embodiment. FIGS. 14 and 15, which illustrate the operation of the example, are a bottom view and a sectional view of a minute indicator wheel and an hour indicator wheel in still another embodiment. DESCRIPTION OF SYMBOLS 1... Clock movement, 2... Alarm mechanism part, 4... Date wheel, 7... Hole, 8... First transmission wheel, 8a... Pinion part, 10... Case body,
11...Second transmission car, 12...1 hour car, 12a
...Lotsuking disc, 13...Third transmission vehicle,
14...24 hour car, 15...teeth, 16a, 16b
...Spindle, 17...Minute indicator wheel, 18...Hour indicator wheel, 19, 20, 19', 20'...Sliding contact piece, 2
1, 22... Conductor ring, 21a, 22a... Projecting piece, 23, 24... Switch, 25, 26...
Fixed contact, 27... Alarm sound generator, 29... Connection plate, 30, 31... Ratchet, 32, 33...
...Positioning lever, 36...Guide turning shaft, 38...
...Feeding wheel, 40a-40d...Arm, 41...
protrusion.

Claims (1)

[Scope of Claims] 1. A minute indicator wheel and an hour indicator wheel facing the front are arranged side by side symmetrically with their rotational axes parallel to each other in a case body to be hung on the wall, and the minute indicator wheel and hour indicator wheel are set. A switch mechanism is provided that closes the power supply circuit of the alarm sound generator at a time corresponding to the angle, and ratchets having opposite engagement directions are integrally provided on the minute indicator wheel and hour indicator wheel, and a switch mechanism is provided between these ratchets. A feed wheel having an arm and a bevel gear located at and engaging with both ratchets, respectively, is provided rotatably about a rotation axis parallel to the minute indicator wheel and the hour indicator wheel, and the tip thereof meshes with the bevel gear. An alarm clock provided with a guide shaft formed as a bevel gear, extending directly downward from the center between the minute indicator wheel and the hour indicator wheel, protruding downward from a hole in the case body, and rotating the feed wheel. . 2. The ratchets of the minute indicator wheel and the hour indicator wheel each have 24 pawls at equal pitches, and the switch mechanism is arranged coaxially with the minute indicator wheel and rotates once per hour. , a 24-hour wheel that is arranged coaxially with the hour indicator wheel and rotates once every 24 hours, and a conductor ring provided on the minute indicator wheel and the hour indicator wheel, each having a protruding piece in the radial direction at one location. , a connecting plate having both ends in sliding contact with these conductor rings, and a sliding contact piece provided on the one-hour wheel and the 24-hour wheel and capable of contacting the protruding piece of the conductor ring of the minute indicator wheel and hour indicator wheel, respectively. and means for avoiding contact between the connecting plate and the conductor ring of the minute indicator wheel at every other pitch of the ratchet of the minute indicator wheel.