JPS6021819Y2 - watch stand - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a wristwatch mounting stand.

Traditionally, wristwatches are left on desks at night when going to bed, taking a bath, or doing water work.

However, if you leave the watch on a desk or other place like this, the watch itself will warm up to a temperature close to your body temperature when it is worn around your wrist, but it will cool down to ambient temperature when you leave it on a desk or other place when you are not using it. In the winter, it feels cold and not very pleasant.

Furthermore, there is a drawback that the rate of the watch changes due to changes in the temperature of the watch body when it is in use and when it is not in use, resulting in a decrease in the accuracy of the watch.

Therefore, models using hairsprings are made into zero thermometers, and models using crystal are designed to eliminate rate changes due to temperature changes by taking into account the cutting angle of the crystal, but they are still completely accurate. It is not possible to eliminate rate changes due to temperature fluctuations.

The present invention eliminates the above-mentioned drawbacks and provides a wristwatch mounting stand that eliminates the temperature difference between the watch body when it is in use and when it is not in use, so that the temperature-rate characteristics can always be kept in the best condition.

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 to 3, a wristwatch mounting stand 1 is used to keep the wristwatch body at a constant temperature even when not in use, and a heating element 2 and a microswitch 3 are placed below a heat sink 5, which will be described later. It has a built-in.

As the heating element 2, a disk-shaped positive characteristic thermistor (hereinafter referred to as PTC heating element) 4 with an output of about 10 watts is used, and when it reaches the Curie temperature, the resistance value suddenly increases, so the current decreases. - It will not overheat above this temperature and has a non-contact temperature control function.

The heat sink 5 is made of a material with good thermal conductivity and is formed into a rectangular shape on which a wristwatch 6 can be placed.

The above-mentioned PTC heating element 4 is placed on the back surface of the heat sink plate 5 at approximately the center.
A hole 7 is formed slightly away from the center, and the contact 3a of the microswitch 3 is made to protrude from the back side to the front side through this hole.

A recess 5a having substantially the same shape as the pressure plate 8 is provided on the central surface of the heat dissipation plate 5, and one end 8a of the pressure plate is screwed therein so as to be movable up and down.

The other end 8b of the press plate 8 is in contact with the contacts of the microswitch 3, and when the wristwatch 6 is placed on the press plate, the other end serves as a fulcrum for one end 8a, which is screwed, and presses downward. The configuration is such that the microswitch 3 is turned on.

Further, a heat insulating material 9 is loaded on the back surface of the heat sink 5, and the entire body is housed in a frame 10.

A hole 12 through which a lead wire 11 passes is provided in one side of the frame 10.

Reference numeral 10a is a lid body, which has a good heat retention effect.

Reference numeral 13 denotes an overcurrent protection fuse connected in series to the PTC heating element 4 to prevent an accident.

14 is a conset, and 15 is an external lead wire.

With the above configuration, as shown in FIG.
When the wristwatch 6 is placed on the wristwatch, the pressure plate is pressed downward by the weight of the wristwatch, which presses the contacts 3a of the microswitch 3 downward, so that the microswitch 3 is turned on.

Then, as shown in the circuit diagram of FIG.
Since it flows into the heating element 4 and puts it into operation, the PTC
Heating elements self-heat.

At this time, the heat transfer path is as follows: PTC heating element 4 -> heat sink 5 -> press plate 8 - wristwatch 6, and the wristwatch can be kept at a temperature of one Curie.

When the wristwatch 6 is removed, the contacts 3a press the pressure plate 8 upward and protrude above the heat sink 5, so the microswitch 3 is turned off and the power supply 16 is cut off.
The PTC heating element 4 becomes inactive.

4 to 6 show other embodiments, in which the heating element 2
In this case, a planar electric heating plate 4a is used instead of the PTC heating element.

The planar heating plate 4a is formed by enclosing a heating wire 4b made of aluminum or nichrome or a heating element made of metal foil in a heat-resistant insulator.

A heat dissipation plate 5 made of a material with good thermal conductivity is superimposed on the upper surface of the planar electric heating plate 4a.

Holes 7 are formed in the heat dissipation plate 5 and the planar electric heating plate 4a so that the contacts 3a of the microswitches 3 protrude toward the surface side, as described in the above embodiments, and the microswitches are attached thereto.

Further, a recess 5a is provided on the surface of the heat dissipation plate 5, into which the pressure plate 8 is screwed, and a temperature controller 17 is provided at one end.
' is installed so that the temperature can be adjusted from the outside.

With the above configuration, the heat sink 5 is controlled by the temperature controller 17.
If the temperature of the wristwatch 6 is set to approximately the same level as body temperature, the temperature will be maintained both when the wristwatch 6 is in use and when it is not in use.

As explained above, according to the present invention, a heating element and a switch are arranged in series below a heat sink, and the contacts of the switch are protruded from the surface of the heat sink, so that a wristwatch placed on the heat sink can be placed on the heat sink. Since the switch contacts are turned on and off depending on the weight, even when not in use, such as when sleeping at night, the watch can be kept at a constant temperature by placing it on the stand.

Therefore, the temperature of the watch body is always maintained constant during use and when not in use, so the temperature-rate characteristics are always kept in the best condition, improving the accuracy of the watch and reducing the feeling of cold when worn, especially in the winter. It's very comfortable.

With a mounting table configured to turn the switch on and off via a press plate, the watch can be reliably turned on by simply placing the wristwatch on the press plate.

In addition, since the temperature of a PTC heating element that uses a PTC heating element does not rise above one Curie temperature, it is safe because there is no risk of ignition or burnout due to overheating, and it is highly durable and does not require a special temperature control mechanism. Since there is no wire, the electric circuit can be simplified, and the structure of the mounting table is also very simple, so the number of manufacturing steps can be reduced and the cost can be reduced.

Wristwatches using a planar heating element are convenient because they can be set to a predetermined temperature using a temperature controller, and the temperature of the wristwatch body can be maintained at any desired temperature.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention; Figure 1 is a sectional view, Figure 2 is a plan view with the lid removed, Figure 3 is a circuit diagram, and Figure 3 is a circuit diagram. Figures 4 to 6 show other embodiments of the present invention, in which Figure 4 is a sectional view, Figure 5 is a partially cutaway plan view with the lid removed, and Figure 6 is a circuit diagram. It is a diagram. 1...Watch mounting stand, 2...Heating element,
3... Micro switch, 3a... Contact, 4... PTC heating element, 4a... Planar heating element, 5... Heat radiation Plate, 6...Watch, 8...Press plate, 17...Temperature controller.

Claims (1)

[Claims for Utility Model Registration] ■ A heat dissipation plate on which a wristwatch is placed, a heating element provided below the heat dissipation plate, and a switch operated by the weight of the wristwatch, the switch operating the heating element. A watch mounting stand characterized by being energized. 2. A wristwatch mounting stand according to claim 1 of the utility model registration claim, characterized in that a pressing plate is disposed on the heat dissipation plate, and a switch is operated via the pressing plate. 3. A wristwatch mounting stand as set forth in claim 1 or 2 of the utility model registration claim, characterized in that a PTO heating element is used as the heating element. 4. The wristwatch mounting stand according to claim 1 or 2 of the utility model registration claim, characterized in that a planar heating element is used as the heating element and a temperature controller is provided on the heat sink.