JPS6249592B2 - - 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, when the minute indicator wheel and the 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 to improve the accuracy of the indicator, and to enable the minute indicator wheel and the 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 10. This embodiment is applied to a wall clock. In FIG. 1, 1 is a crystal clock movement, and 2 is an alarm mechanism section constituting a reference 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. FIG. 2 shows a schematic cross section of the timepiece movement 1. 3 is the minute wheel, 4 is the sun wheel, and 5 is the hour wheel. A hole 7 is provided in the movement case 6 in correspondence with the outer periphery of the hour wheel 4, and by fixing the alarm mechanism section 2 and the timepiece movement 1, a pinion section of the first transmission wheel 8 of the alarm mechanism section 2 is formed. 8a 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 the case body, 11 is a second transmission wheel that meshes with the first transmission wheel 8, and 12 is a one-hour period driven by the second transmission wheel 11. Car, 13 is the third
Transmission vehicle 14 is a 24-hour vehicle. The rotation of the 1-hour wheel 12 is intermittently transmitted to the 24-hour wheel 14 via the third transmission wheel 13. In other words, 1 hour car 12
It 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. Third
The lower gear portion 13b of the transmission wheel 13 has 60 teeth and meshes with the wheel 14 24 hours a day. The number of teeth of the 24-hour wheel 14 is 120. Therefore, 1 hour car 12
In rotation, wheel 14 rotates 1/24 times in 24 hours. As for the rotation timing, the minute hand is fixed to the minute hand wheel 3 of the clock movement 1 so that the 24-hour wheel 14 rotates once while the minute hand (not shown) indicates 55 minutes to 60 minutes. Note that once the minute hand is fixed in this state, it will remain in this 24 hour position.
The rotation timing of the hour wheel 14 does not change.

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 indicator 17 has numbers 0, 5,..., 55 (not shown) displayed on its surface, and the hour indicator 18 has numbers 1, 2, 3,..., 24 (not shown) displayed. 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). 1 hour car 12 and 24 hour car 14
Sliding contact pieces 19 and 20 protruding from the upper and lower surfaces are attached to the. These sliding contact pieces 19, 20 are made of conductive leaf 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 and 22a, together with the sliding contact pieces 19 and 20 of the 1-hour indicator 12 and the 24-hour indicator 14, constitute a minute switch mechanism 23 and an hour switch mechanism 24, respectively. 25 and 26 are connecting terminal pieces, which are always in contact with the conductor rings 21 and 22. An alarm alarm 27 and a battery 28 are interposed in the circuit between the connecting terminal pieces 25 and 26. Below the 1-hour car 12 and 24-hour car 14 is a conductor plate 29.
is fixedly provided to the case body 10. This conductor plate 29 has two parts concentric with the support shafts 16a and 16b.
The annular parts 29a and 29b are connected by a band-like connecting part to form a pair of glasses.
The lower sliding protrusions 19', 20' of the 24-hour wheel 14 are in constant contact with the annular portions 29a, 29b of the conductor plate 29, respectively. Therefore, the one connection terminal piece 25
, the conductor ring 21, the sliding contact pieces 19, 19',
A switch circuit is constructed which connects the conductor plate 29, the sliding contact pieces 20', 20, the conductor ring 22, and the other connecting terminal piece 26 in this order.

In addition, the numbers displayed on the minute indicator 17 and hour indicator 18 and the protruding pieces 21 of these indicators 17 and 18
a, 22a location and hourly cars 12 and 24
The positional relationship between the sliding contact pieces 19 and 20 of the hour wheel 14 is set as follows. That is, when the display on the hour indicator wheel 18 is set to one of 1, 2, ..., 24, the protruding piece 22a of the hour indicator wheel 18 displays the 24-hour indicator 14 while the hour hand indicates the displayed time. so that it comes into contact with the sliding contact piece 20 of. Further, when the display of the minute indicator 17 indicates 0 minutes, the protruding piece 21a of the minute indicator 17 contacts the sliding contact piece 19 of the hour indicator 12, and the hour and minute hands at that time indicate 0 minute.

The guideline setting mechanism will be explained. As shown in FIGS. 3 and 9, the minute indicator wheel 17 and the hour indicator wheel 18 each have ratchets 30 and 31 integrally formed on their back surfaces. 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,
33 is a positioning lever for maintaining the rotation angle of the minute indicator wheel 17 and the hour indicator wheel 18. The positioning levers 32, 33 are rotatably attached to pins 32a, 33a protruding from the case body 10, and constantly press the latches 30, 31 by the urging force of torsion coil springs 34, 35. Reference numeral 36 denotes a guide shaft that is rotatably inserted into the hole 37 of the case body 10, and the tip thereof is formed into a bevel gear 36a. Reference numeral 38 denotes a feed wheel, which includes a bevel gear 39 that meshes with the bevel gear 36a of the guide shaft 36, and a pair of wheels that project in a V-shape and engage with the ratchets 30 and 31 of the minute guide wheel 17 and the hour guide wheel 18, respectively. It has arms 40, 41. 38a is a support shaft of the feed wheel 38. A spring member 42 holds the feed wheel 38 at a certain neutral position, and is attached to the mounting shaft 42a of the case body 10. The spring member 42 clamps a longitudinal side surface 43a of a boss 43 having an oval cross-section and projecting from the upper surface of the feed wheel 38. Reference numeral 44 denotes a stop boss that engages with the arms 40 and 41 of the feed wheel 38 to restrict the range of rotation of the feed wheel 38.

In FIG. 1, 45 is an AM/PM display wheel which meshes with a gear provided on the hour hand wheel 5. AM・
The surface of the PM display car 45 is divided into two colors, such as red and white. AM/PM display car 45 is a guide.
This is necessary to set the current time in the case of a 24-hour system, but is not necessary in the case of a 12-hour system.

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 and 22a of both the minute indicator wheel 17 and the hour indicator indicator 18 are brought into contact, both connecting terminal pieces 25 and 26 are connected to the conductor plate 2.
9, and the wake-up sound generator 27 generates the wake-up sound.

The guideline setting operation will be explained. Standard turning shaft 36
When the feed wheel 38 is rotated in one direction (direction marked A in FIG. 10), the arm 40 of the feed wheel 38 and the ratchet 30 of the minute indicator wheel 17 engage, and the minute indicator wheel 17 engages with the claw of the ratchet 30. Only one pitch is sent. When the feed wheel 38 returns to its original position, the minute indicator wheel 17 is rotated in the opposite direction until the tip of the arm 40 and the pawl of the ratchet 30 are disengaged, but after this disengagement, the positioning lever 32 and spring 34
It is returned to a certain position and held by the urging force of. When the feed wheel 38 is rotated in the opposite direction (direction of arrow B), the arm 41 of the feed wheel 38 and the ratchet 31 of the hour indicator wheel 18 engage, and the hour indicator wheel 1 is rotated.
Only one pitch of 8 is sent. When the feed wheel 38 returns to its original position, the hour indicator wheel 18 tries to rotate slightly in the opposite direction as before, but is held at a constant position by the positioning lever 33. Therefore, minute setting and hour setting can be performed separately by turning the reference turning shaft 36 to the right or left. Ratchet 3 of minute indicator 17 and hour indicator 18
If the number of pawls for 0 and 31 is 24, one movement of the guide shaft 36 can advance the hour indicator 18 by 1 hour and the minute indicator 17 by 2.5 minutes.

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 advantage that the reference setting operation is easy and the appearance of the watch can be simplified. In particular, when using the guide shaft 36, this guide shaft 3
6 protrudes downward from the case body 10, so for example, the dial is large and a part of the back side of the dial is attached to the case body 1.
Even when 0 is provided, the dial does not get in the way and the guideline setting operation can be performed while hanging on the wall. In this case, the minute indicator wheel 17 and the hour indicator wheel 18 are provided symmetrically, and the guide shaft 36 is located in the center between them, so when operating the guide shaft 36 while pushing it up, the center of gravity The case body 10 does not tilt as it is pushed up in position, making it easy to operate. Moreover, the indicator operation means does not protrude from the surface of the dial, giving it a good appearance. Guideline turning shaft 36 and feed wheel 38
The transmission mechanism is simple because it meshes with bevel gears. Furthermore, if the minutes indicator wheel 17 and the hour indicator wheel 18 are displayed digitally using numbers as in this embodiment, there is an advantage that they are easy to read apart from the hour and minute hands that are displayed on scales.
In other words, in the past, a watch dial with a reference scale and a guide hand coaxial with the hour, minute, and second hands was used, but this one has a clock scale of 12
The standard scale is a 24-hour scale, whereas the scale is a time scale, making it difficult to read. However, if the guide display is a digital display and the time display is a scale display, as in this embodiment, the advantage is that even if one is a 24-hour display and the other is a 12-hour display, it is easy to distinguish between the two. There is.

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. A feed wheel having a pair of arms that engage each other can be rotated forward and backward within a certain angle range, and a guide shaft for rotating the feed wheel is provided, so minute and hour settings can be set separately. The guide can be set with high accuracy, and the minute setting and hour setting can be performed separately by simply changing the direction of rotation using a single guide rotary shaft. Therefore, the guideline setting operation is easy and the appearance can be improved. Especially when using a reference rotation axis,
Since this guide shaft protrudes downward from the case body, for example, even if the dial is large and the case body is provided behind a part of the dial, the dial does not get in the way and can be used as a guide while hanging on the wall. Setting operations can be performed.
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 one embodiment of the invention, Fig. 2 is a schematic sectional view of the clock movement, and Fig. 3 is a schematic sectional view of the clock movement.
The figure is a front view of the inside of the alarm mechanism, FIG. 4 is a cross-sectional view of FIG. 3, FIG. 5 is a longitudinal sectional view of FIG. 3, and FIG. Fig. 7 is an exploded perspective view showing the relationship between the 24-hour car, etc., Figure 7 is a perspective view showing the relationship between the 1-hour car, the 24-hour car, and the third transmission car, and Figure 8 is the same perspective view showing the relationship between the 1-hour car and the 3rd transmission car. A partial front view showing the relationship with the transmission wheel, and FIGS. 9 and 10 are also an exploded perspective view and a front view showing the reference wheel operating mechanism portion thereof. 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, 13...
...Third transmission wheel, 14...24 hour wheel, 15...teeth,
16a, 16b...Spindle, 17...Minute indicator car, 1
8...Hour indicator wheel, 19,20...Sliding contact piece, 2
1, 22...Conductor ring, 21a, 22a...Protruding piece, 23, 24...Switch mechanism, 25, 26
... Connection terminal piece, 27 ... Alarm sound generator, 29
... Conductor plate, 30, 31 ... Ratchet, 32,
33...Positioning lever, 36...Guide turning shaft,
38...Feeding wheel, 40, 41...Arm, 44...
...Trusted boss.

Claims (1)

[Claims] 1 Inside the wall-hanging case body, a minute indicator wheel and an hour indicator wheel facing the front are placed symmetrically side by side with their rotational axes parallel to each other, and the minutes indicator wheel and hour indicator wheel are placed side by side in a symmetrical manner, and the minutes indicator wheel and hour indicator wheel are set in parallel to each other at the time corresponding to the set angle of the minute indicator wheel and hour indicator wheel. A switch circuit for closing the power supply circuit of the alarm sound generator is provided, ratchets having opposite engaging directions are integrally provided on the minute indicator wheel and the hour indicator wheel, and both ratchets are located between these ratchets. A feed wheel having a pair of arms and a bevel gear that engage with each other is provided so as to be rotatable in forward and backward directions within a certain angle range about a rotation axis parallel to the minute indicator wheel and the hour indicator wheel, and the tip thereof is connected to the bevel gear. A guide wheel is provided which is formed as meshing bevel gears, extends directly downward from the center between the minute guide wheel and the hour guide wheel, projects downward from the hole in the case body, and rotates the feed wheel. Alarm clock.