Electric coaster

Abstract

Conventionally, it was common to drink coffee before it got cold, but the electric coaster of the present invention has a heating part (2) so that you can drink hot coffee as it is, and prevents the existing cup (3) from getting cold. [Solution] The electric coaster of the present invention is composed of an outer frame (1) and a heat generating part (2). Inside the outer frame (1) is the heat generating part (2). The heat generating part (2) has a push button switch (2a) in the center and a heat generating coil (2b) and a cord (2c) on the outside.

Description

[Technical field]

[0001] The present invention relates to an electric coaster that keeps partially consumed hot coffee warm. [Background technology]

[0002] In the past, it was common to make coffee using water heated to about 70 degrees and drink it before it got cold. However, when I was concentrating on reading a book or watching TV, the water quickly cooled down to room temperature of about 30 degrees, so I had no choice but to drink cold coffee. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special table 2018-516630 [Patent Document 2] Patent Publication No. 2008-178612 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0004] In the past, coffee was generally drunk before it cooled down, but as a way to maintain the temperature, a stainless steel tin can was used to lengthen the time it took for the temperature to drop. Also, with ceramic cups, coffee was heated in a microwave for 30 seconds until it reached about 90 degrees, and then cooled down before drinking, but getting up from the table was a hassle. Also, when coffee heated to 90 degrees was heated in a microwave, only the top part was heated, and the bottom part had to be stirred at 30 degrees before it could be drunk. However, the existing cup (3) could not be heated in a microwave, so the existing cup (3) also contributed to the temperature dropping.

[0005] Therefore, the electric coaster of the present invention provides an electric coaster that has a heating part (2) so that hot 70 degree coffee can be drunk as is and prevents the existing cup (3) from getting cold. [Means for solving the problem]

[0006] In order to achieve the above object, the electric coaster of the present invention is composed of an outer frame (1) and a heat generating part (2). The heat generating part (2) is located inside the outer frame (1). The outer frame (1) supports and reinforces the heat generating part (2) at the location where the end of the thread (3a) of the existing cup (3) rests, preventing it from falling over.

[0007] The heating unit (2) has a push button switch (2a) in the center, and on the outside of the push button switch (2a) is a heating coil (2b) and a thermostat (2d) for adjusting the temperature of the heating coil (2b).

[0008] Then, after the switch (2a) of the electric coaster is turned on and a certain amount of time has passed, a safety timer (2e) is activated and cuts off the electricity connecting the wiring. Because high voltage can cause electric shock, a transformer (2j) is used to reduce the voltage, thereby achieving the purpose. Effect of the Invention

[0009] The electric coaster of the present invention has the following advantages. (i) It can keep coffee and other drinks warm at 70 degrees. (See paragraph 0014 for details) (b) It has a push button switch so that it can be turned off when you want to drink. (See paragraph 0013 for details) (c) The timer has a safety device that turns off the power if the cup is not moved for more than 10 minutes. (See paragraph 0015 for details) (ii) If you want to change the set temperature from 70 degrees, set the thermostat to the desired temperature. (See paragraph 0017 for details) (e) Coasters heat from below, creating convection currents, so there is no need to stir with a spoon. (See paragraph 0017 for details) (f) Electric coasters are 10 volts, so the voltage is low and it is difficult to get electrocuted. (See paragraph 0037 for details) (d) When using an electric coaster, it is less likely to get cold if there are no thread ends. (See paragraph 0039 for details) (H) The electric coaster provided has an outer frame that covers the entire table. (See paragraph 0032 for details) [Brief description of the drawings]

[0010] [Figure 1] The figure shows a perspective view of the electric coaster in use. [Diagram 2] The figure is a perspective view of an electric coaster. [Diagram 3] The figure is a perspective view in which the heat generating portion is removed from the outer frame. [Figure 4] The figure shows the wiring diagram of an electric coaster. [Diagram 5] The figure shows a plan view and a cross-sectional view of the heating coil made of nichrome wire. [Figure 6] The figure shows a cross-sectional view of a cup being heated with a nichrome wire. [Figure 7] The figure shows a plan view and a cross-sectional view of a heating coil made of spring-shaped nichrome wire. [Figure 8] The figure shows a plan view and a cross-sectional view of a heating coil formed as a filament. [Figure 9] The figure shows a plan view and a cross-sectional view of a single light bulb equipped with a heating coil. BEST MODE FOR CARRYING OUT THEINVENTION

[0011] The electric coaster of the present invention is an electric warming device that keeps drinks such as coffee placed on a table (4) from getting cold, and is a very small device of about 100 watts because it does not heat water. Since the electric coaster uses electricity to keep the drink warm, it uses commercial power from an outlet as its energy source. By drilling a hole in the table (4) and attaching the heating unit (2) to the inside, the entire table (4) can serve as the outer frame (1), but here we will explain a movable version that uses the outer frame (1).

[0012] The electric coaster weighs about 2 kg, and an existing cup (3) is placed on it to heat it from below. There are two heating methods: one is to heat air with nichrome wire (2g), which is used in electric stoves, and the air heats the bottom of the existing cup (3) above, and the other is to heat it by direct contact. Another method is to use a light bulb (2k), which uses the heat of the light energy emitted by the filament (2n) of the light bulb (2k).

[0013] At the center of the electric coaster is a push button switch (2a), and when the push button switch (2a) comes into contact with the bottom of the existing cup (3) and is pressed, electricity flows and the heating coil (2b) heats up. At this time, the size of the heating part (2) is about Φ50, and the thread tail (3a) of the existing cup (3) is Φ70, and the fact that the thread tail (3a) does not protrude from the thread tail (3a) saves electricity and does not waste power. When drinking coffee, the existing cup (3) is lifted up, and the push button switch (2a) is turned off.

[0014] If the heating coil (2b) becomes too hot, there is a risk of fire, so a thermostat (2d) is attached to the end of the heating coil (2b). The thermostat (2d) is installed right next to the heating part (2) and measures the temperature of the heating coil (2b) to prevent the temperature of the existing cup (3) from exceeding the set temperature of 70 degrees.

[0015] And, there is a timer (2e) attached to a place that is not affected by the temperature of the heating coil (2b). The timer (2e) turns off if electricity flows for more than 10 minutes. If coffee is heated at 70 degrees for hours, it will boil down and become undrinkable, and electricity will be wasted, so the timer (2e) was installed.

[0016] Therefore, when the timer (2e) is lifted within 10 minutes to drink coffee from the existing cup (3), the push button switch (2a) turns off and the timer (2e) returns to 0, cutting off the electricity 10 minutes after the existing cup (3) is returned to the outer frame (1). In this way, the timer (2e) was installed to ensure the safe use of the electric coaster.

[0017] Furthermore, by installing a device to change the set temperature of the thermostat (2d) from 70 degrees, it is possible to set it to about 50 degrees for hot sake or about 30 degrees for lukewarm sake. Also, because the electric coaster heats from below, the heated coffee becomes lighter, rises to the surface and flows toward the water surface. This causes convection (3b) and the liquid naturally mixes, so unlike when heating in a microwave oven, where only the top of the existing cup (3) gets warm, there is no need to mix it. Example 1

[0018] The electric coaster of the present invention will now be described with reference to the drawings. Figure 1 is a perspective view of an electric coaster placed on a table (4), with the existing cup (3) in dotted line showing how it would look when actually in use. The electric coaster has an outer frame (1) with a diameter of 120 mm and a thickness of 20 mm, with a heating element (2) inside. Since the heating element (2) is diameter 50 mm, the outer frame (1) is donut-shaped and made of rubber to prevent slipping. Alternatively, the outer shape of the outer frame (1) can be rectangular, or if it is a built-in one, the table (4) can take the place of the outer frame (1).

[0019] The inner heating part (2) has a push button switch (2a) in the center, and around it is a heating coil (2b) with a power consumption of 100 watts and a thermostat (2d) that keeps the temperature of the existing cup (3) at 70 degrees. Even though the power consumption is only 100 watts, the present invention uses a transformer (2j) to pass a large amount of current at a low voltage of 6 volts, 17 amperes.

[0020] And there is a timer (2e) in a place that is not affected by the temperature, and this timer (2e) is a safety device that switches off the electric coaster if you do nothing for 10 minutes because the coffee will boil over after an hour has passed since the electric coaster is turned on. In other words, if you forget that you are drinking it and go out, the timer (2e) will automatically cut off the power after 10 minutes, so the coffee will not boil over.

[0021] In addition, the timer (2e) has a 70 degree thermostat (2d) so that if books or other objects are piled on top of the electric coaster and the switch (2a) is turned on, there is no risk of a fire. However, there is a possibility of damaging important books, so the thermostat (2d) cuts off the power in 10 minutes, which is why the thermostat (2d) is necessary.

[0022] The timer (2e) starts counting when the push button switch (2a) is turned on, and automatically cuts off the electricity after 10 minutes. Normally, if you start drinking coffee and take a sip of coffee about two minutes later, you can lift the existing cup (3) to turn off the switch (2a). If you then place the existing cup (3) on the electric coaster, the count starts over again, so there is no impact while you are drinking your coffee. The cords (2c) are then connected to the outlet.

[0023] However, by not taking the power directly from the outlet but by using a transformer (2j), it is handled at a low voltage of 6 volts, so there is no risk of electric shock even if you touch the bare nichrome wire (2g). And since the existing cup (3) is a dotted line and does not actually exist, the top of the central push button switch (2a) is not pressed and is in the OFF state. However, when the push button switch (2a) is ON, it is pressed against the bottom of the existing cup (3) and retracts, allowing electricity to flow. Then, electricity flows through the heating coil (2b), which generates heat.

[0024] Figure 2 is a perspective view of an electric coaster. There is a push button switch (2a) in the center, around which is a heating coil (2b), and a thermostat (2d) just at the end of that (not shown in the drawing); these parts make up the heating part (2). The heating coil (2b) has its top scraped off like an electric stove, and a coil of nichrome wire (2g) or a spring-shaped nichrome wire is attached to it. There are also some that have a light bulb (2k) attached and use the light from a filament (2n) as a heat source.

[0025] The heating coil (2b) is generally heated with a nichrome wire (2g), but it can also be heated with a 100-watt light bulb (2k). This method of heating with a light bulb (2k) converts thermal energy from the light bulb (2k) into light, which heats the bottom of the existing cup (3). Even if there is space at the bottom of the existing cup (3), the light energy is transmitted as is and heats the cup. For this reason, it is best to paint the hole (2i) where the light bulb (2k) is attached with a light-reflecting paint, and the inside of the end of the wire (3a) is black, which absorbs light energy.

[0026] To prevent the heating coil (2b) from getting too hot, a thermostat (2d) is provided. If the temperature of the existing cup (3) exceeds 70 degrees, the thermostat (2d) cuts off the power supply to prevent the temperature of the existing cup (3) from exceeding 70 degrees.

[0027] Furthermore, there is a timer (2e) (not shown in the drawing) in a place that is not affected by the heat of the heating coil (2b), and if electricity is still flowing for 10 minutes or more when you forget to drink and leave the coffee machine, the timer (2e) cuts off the power. Therefore, if you drink coffee once every 10 minutes, the timer (2e) will not cut off.

[0028] The timer (2e) is installed in a place where the temperature is not transmitted, and starts counting when the power is turned on and goes off after 10 minutes. Usually, about once every two minutes, the user lifts the existing cup (3) to drink coffee, and the push button switch (2a) turns off the power, so the timer starts counting again from 1.

[0029] When the existing cup (3) is placed on the electric coaster, the timer (2e) starts counting from 1. Therefore, if the existing cup (3) is left on the electric coaster and you go out, there is no risk of fire because of the thermostat (2d), but the coffee will boil over, so the thermostat (2d) prevents this and wastes electricity.

[0030] Figure 3 is a perspective view of the outer frame (1) with the heat generating part (2) removed. The outer frame (1) is provided to compensate for the small size of the heat generating part (2), approximately Φ50, and to reinforce the heat generating part (2) from the outside to prevent it from falling over.

[0031] The reason why the heat generating part (2) is small is that if it is not smaller than the end of the thread (3a) of the existing cup (3), the heat generating part (2) protruding outside the existing cup (3) will be wasted, and if the handle of the existing cup (3) protrudes, the existing cup (3) will feel hot when held.

[0032] So, if the end (3a) of a regular existing cup (3) is Φ70, placing the heating part (2) at Φ50 will prevent the heat source from leaking. Also, the exterior of the outer frame (1) can be not only circular but also square, and the material can be non-slip, such as rubber, but it can also be made of wood or metal, and in the case of a table (4) equipped with an electric coaster, a hole (2i) can be made in the top of the table (4) and the heating part (2) can be attached there, so that the entire table (4) serves as the outer frame (1).

[0033] Figure 4 is a wiring diagram for an electric coaster. In the center is a push button switch (2a) or a light sensor switch (2a), which is drawn on the left side of this wiring diagram, and a heating coil (2b) surrounds it. In this wiring diagram, it is drawn on the right side of the switch (2a). The heating coil (2b) contains nichrome wire (2g) and the filament (2n) of the light bulb (2k), and is connected to a thermostat (2d) nearby, and via a cord (2c), a timer (2e) is attached in a place that is not affected by heat, and is connected to a transformer (2j).

[0034] And underneath it is the earth (2f), which is connected to the transformer (2j) via the push button switch (2a) and earth (2f). The transformer (2j) has an iron core wound 30 times, and the 100 volts of the commercial power supply is wound 500 times in the iron core of the transformer (2j), lowering the voltage from 100 volts to 6 volts. 6 volts may seem like a very low voltage, but the stove ignition device has a 3 volt ignition device with two dry batteries, and the ignition device ignites by heating the nichrome wire red hot at 3 volts, so we used double that, 6 volts. Example 2

[0035] The following describes the use of the nichrome wire (2g) in the heating coil (2b). Figure 5 shows a plan view and a cross-sectional view of the heating coil (2b) made of nichrome wire (2g). The plan view is drawn at the top, and a cross-sectional view of the heating part (2) is drawn at the bottom, and the two figures are separated by dotted lines to show only the external appearance of the heating part (2).

[0036] In the center of the diagram is a push button switch (2a), from which the nichrome wire (2g) of the heating coil (2b) is wound in a single spiral layer, and the Φ0.5 nichrome wire (2g) is wound 40 times and wired to the thermostat (2d).

[0037] This method is energy efficient as it transfers heat directly, but there is a risk of electric shock if 100 volts is passed directly through the nichrome wire (2g), so a transformer is used to keep it at 6 volts. This is the same concept as a welding machine; if the voltage is reduced from 200 volts to 24 volts, the current increases and the voltage decreases. Because the voltage is reduced, there is no need to worry about sparks or electric leakage. In the same way, even if you touch the nichrome wire (2g) directly, it is usually difficult to get an electric shock at 6 volts.

[0038] Figure 6 is a cross-sectional view of an existing cup (3) being heated by a nichrome wire (2g). The existing cup (3) is placed on an electric coaster, and the area surrounded by the end of the wire (3a) at the bottom of the existing cup (3) is slightly concave. In order to place the existing cup (3) there, the switch (2a) retracts from the dotted line state to the solid line state, and the switch (2a) is energized.

[0039] When this happens, electricity flows through the nichrome wire (2g), generating heat. There is air directly above the nichrome wire (2g), and this air heats the inside of the end of the wire (3a). However, while the end of the wire (3a) is good for reducing the surface area placed on the cold table (4) and for avoiding direct contact with the cold table (4), when using an electric coaster to warm an existing cup (3), it is better to use one without the end of the wire (3a), as the temperature of the nichrome wire (2g) is directly transmitted to the coaster. Therefore, the end of the wire (3a) is not necessary for this invention.

[0040] And when the bottom of the existing cup (3) is heated, the liquid at the bottom of the existing cup (3) becomes warmer than the surrounding area, and the warm liquid becomes lighter and rises to the top. Therefore, the object being heated from below causes convection (3b), which heats the entire existing cup (3), so there is no need to mix with a spoon.

[0041] Figure 7 shows a plan view of the upper part and a cross-sectional view of the lower part, in which the heating coil (2b) is made of spring-shaped nichrome wire (2g). The plan view is drawn at the top, and a cross-sectional view of the heating part (2) is drawn at the bottom, and the two figures are connected by dotted lines to show only the external appearance of the heating part (2).

[0042] There is a push button switch (2a) in the middle, and the nichrome wire (2g) of the heating coil (2b) is wound in a spring shape from the switch (2a), and the Φ0.5 nichrome wire (2g) is wired to the thermostat (2d).

[0043] In this method, heat is transferred through air, so there is a risk of electric shock if 100 volts is applied directly to the nichrome wire (2g), so a transformer (2j) is used to keep it at 6 volts. This is the same concept as with welding machines; if the voltage is reduced from 200 volts to 24 volts, the current increases and the voltage decreases, eliminating the need to worry about sparks or electrical leakage. In the same way, even if you touch the nichrome wire (2g) directly, you will not normally get an electric shock at 6 volts, and there is no risk of burns at 70 degrees. Example 3

[0044] The usage state of the light bulb (2k) will be described below. Figure 8 shows the top plan view and bottom cross-sectional view of the heating coil (2b) used as the filament (2n) of the light bulb (2k). The top of the figure shows a plan view of the light bulb (2k), which has six bulbs, each rated at 16 watts, for a total of six bulbs for a total of 96 watts. Below that is a cross-sectional view of the heating part (2), and the two figures are shown with dotted lines to show only the external appearance of the heating part (2).

[0045] There is a push button switch (2a) in the middle, and the switch (2a) is connected to a rod with a wire that moves downwards, turning on the switch (2a), causing the light in the light bulb (2k) to emit light and heat the bottom of the existing cup (3) placed on top. From the switch (2a), there are many filaments (2n) of the light bulb (2k) in the heating coil (2b), which are wired to the thermostat (2d).

[0046] This light bulb (2k) is 16 watts, and there are six of them in total, so the total is 96 watts. With this method, even if there is a space between the bottom of the existing cup (3) and the heating coil (2b), the energy is converted from the filament (2n) into light energy and transmitted to the bottom of the existing cup (3) as light energy, so the existing cup (3) is slowly heated from the bottom.

[0047] Therefore, the hole (2i) for inserting the light bulb (2k) of the heat generating part (2) should be made of a mirror-like material that reflects light, and if the bottom of the existing cup (3) is painted black to absorb light, light energy can be exchanged.

[0048] Figure 9 shows a plan view (top) and a cross-sectional view (bottom) of a heating coil (2b) that is a single light bulb (2k). The plan view is drawn at the top, and a cross-sectional view of the heating part (2) is drawn at the bottom, and the two figures are shown with dotted lines to show only the external appearance of the heating part (2).

[0049] In the middle is the lever (2m) of the push button switch (2a), which is connected to the heating coil (2b), the filament (2n) of the light bulb (2k), and the thermostat (2d).

[0050] This light bulb (2k) is 100 watts, and this method uses a 400 watt floodlight to keep the takoyaki and okonomiyaki from getting cold. Even if a space is created between the existing cup (3) and the heating coil (2b), the energy is converted from the filament (2n) into light energy and transmitted to the bottom of the existing cup (3) as light energy, so the existing cup (3) is slowly heated from the bottom.

[0051] Therefore, the hole (2i) for inserting the light bulb (2k) in the heat generating part (2) should be a mirror-like material that reflects light, and if the bottom of the existing cup (3) is painted black to absorb light, light energy can be exchanged. With this method, the light bulb (2k) protects the filament (2n), so a transformer (2j) is not required. Example 4

[0052] Provides detailed explanations of symbols and terminology. The outer frame (1) has the role of reinforcing the heating part (2) so that it does not tip over, and also to make the whole thing larger, since the heating part (2) is small. And since the end of the thread (3a) rests on the outer frame (1), in a true sense, the part of the coaster that holds the existing cup (3) is the outer frame (1). The heating unit (2) is made up of a push button switch (2a), a heating coil (2b), and a thermostat (2d), and these components are collectively referred to as the heating unit (2). The switch (2a) is a part of the heating unit (2) and is of the push button type. In addition, a light sensor is used so that when the sensor is covered with an existing cup (3), the light is blocked and the sensor is activated, turning on the switch (2a). However, there is a risk of malfunction when the lights in the room are turned off. The heating coil (2b) is a part of the heating unit (2), and can be wound with nichrome wire like an electric stove, or heated from below with a 100W light bulb. This method of heating with light converts energy into light and shines it evenly onto the bottom of the existing cup (3), so even if the bottom of the existing cup (3) is concave, it will keep it warm. The cord (2c) is used to conduct electricity to the heating element (2) and is usually made up of two wires, the other of which is earth (2f).

[0053] The thermostat (2d) is a part of the heating unit (2), and if the temperature of the heating coil (2b) becomes too high, it cuts off the power supply to the heating coil (2b) to maintain the temperature of the existing cup (3) at 70 degrees. Alternatively, it is possible to change the set temperature of 70 degrees. Therefore, it is installed at a position where the temperature of the heating coil (2b) can be measured. The timer (2e) is installed away from the heating coil (2b) in a place where it does not affect the temperature, and the timer (2e) has an extension period of 10 minutes, and if the existing cup (3) is not lifted within the 10 minutes and the timer (2e) switch is not set to 0, the timer (2e) will cut off the power in 10 minutes. This was installed to prevent the coffee from boiling over when you go out and forget that you had coffee.

[0054] The earth (2f) is connected from the push button switch (2a) to the transformer (2j) or the outlet. The nichrome wire (2g) is a part of the heating coil (2b). The nichrome wire (2g) is used in tabletop stoves and the like. Tabletop stoves use a 100-volt household power supply, but in the present invention, a transformer is used to raise the voltage to 6 volts and pass a large current through it, so the spark distance is short and it is safe. The groove (2h) is used only in Fig. 5 and Fig. 6. If the nichrome wire (2g) is exposed on the top surface of the heating part (2), it will be difficult to stabilize it with the bottom of the existing cup (3). Therefore, the groove (2h) is provided and the nichrome wire (2g) is attached therein. The hole (2i) is for receiving the light bulb (2k). The hole (2i) needs to have a mirror to reflect light, and is painted at least silver color. A transformer (2j) is a type of device that changes voltage or current. It basically has two magnetically connected primary coils and a secondary coil. The change in magnetic flux in the primary coil induces a voltage in the secondary coil. The coil is usually wound around a ferromagnetic material with high magnetic permeability, such as an iron core, to strengthen the magnetic coupling. Transformers (2j) are also called voltage transformers or voltage converters. For example, if the primary coil is wound 500 times and 100 volts for household use is passed through it, the voltage of the secondary coil, which has 30 turns, will flow 6 volts, making it less likely to cause an electric shock, but a large current will flow through the narrow nichrome wire (2g), generating heat at an angle. The light bulb (2k) is depicted in Figures 7 and 8. The light bulb (2k) transmits heat energy to the bottom of the existing cup (3) through light. The advantage is that the light can transmit energy even if it is a little far away, but the energy efficiency is lower than that of the nichrome wire (2g).

[0055] The filament (2n) is a linear conductor inside the light bulb (2k) that glows when an electric current flows through it. The lever (2m) is the same as that used in Figure 8. When there is one light bulb (2k), the central push button switch (2a) is at the end, so the lever (2m) that operates the switch (2a) is made longer. The existing cup (3) is a cup that has been used conventionally, and the existing cup (3) also does not have a thread end (3a) and is flat, which is good for an electric coaster. The end of the thread (3a) is the part at the bottom of the existing cup (3), and in the past, the end of the thread (3a) was attached to prevent the cold temperature of the table (4) from being transferred to the existing cup (3) when it was placed on the table (4). However, with an electric coaster, removing the end of the thread (3a) and allowing the electric coaster to stick to the bottom of the existing cup (3) makes it easier for heat to be transferred. Convection (3b) is a phenomenon in which heat is transported by the flow of a fluid. When the flow is caused by buoyancy, such as the coffee in an existing cup (3) being heated, it is called natural convection, while when it is caused by a fan or stirrer, it is called forced convection. Therefore, the convection that occurs when the bottom of an existing cup (3) is heated is called natural convection. The table (4) is a desk or a tray. The electric coaster attached to the table (4) is completed by drilling a hole in the table (4) and attaching the heating element (2) into it, so the entire table (4) serves as the outer frame (1). [Industrial Applicability]

[0056] In addition to keeping coffee and other drinks warm, this electric coaster can also warm up cold sake. This electric coaster does not draw enough power to heat it up in a short time, but it is useful when you want to read a book at your leisure.

[0057] In addition, if this electric coaster is installed in a table (4), the outer frame (1) is not necessary, only the heating part (2) is needed, and the outer frame (1) is fulfilled by the entire table (4). Therefore, the top of the table (4) becomes neat and tidy. [Explanation of symbols]

[0058] 1 Outer frame 2 Heating unit 2a Switch 2b Heating coil 2c Cord 2d Thermostat 2e Timer 2f Earth 2g Nichrome wire 2h groove 2i hole 2j transformer 2k bulb 2n filament 2m Lever 3 Existing cup 3a End of thread 3b Convection 4 Tables

Claims

[Claim 1] The electric coaster is composed of an outer frame (1) and a heating unit (2). The outer frame (1) has the heat generating portion (2) on the inside, The outer frame (1) is where the end (3a) of the existing cup (3) rests. The heating unit (2) has a switch (2a) in the center. On the outside of the switch (2a), there are a heating coil (2b), a thermostat (2d), a transformer (2j), and a cord (2c). The electric coaster is characterized in that the transformer (2j) reduces the 100 volts of the commercial power supply to a voltage that is less likely to cause electric shock.

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