Food warming plate

Abstract

The present invention provides a food warming plate, which comprises a first plate body having a first heating element and a second plate body having a second heating element. At least two foldable feet are installed on the first plate body and are distributed along its circumference, and a footrest is installed on the second plate body and is distributed along its circumference. A concave cavity is provided on the upper side of the footrest. When the feet are in the extended state, the feet can be inserted into the concave cavity. A first electrode is provided at the bottom of at least one foot, and the first heating element is electrically connected to the first electrode through a first wire located in a pin. A socket matching the first electrode is provided in at least one concave cavity, and a second electrode is provided on the socket. When the foot is inserted into the concave cavity, the first electrode is connected to the second electrode. The first plate body can be installed on the second plate body in a stacked manner, so as to make the most of the desktop space. The entire double-layer food warming plate only requires one external power cord, further saving space.

Description

Technical Field

[0001] The present invention relates to the field of household appliances, and particularly to a food warming plate for food warming. Background Art

[0002] When the temperature is relatively low, the dishes on the dining table are likely to cool down, which is not conducive to eating. The food warming plate came into being, and its heat source is usually an electric heating tube or heating wire placed under a ceramic plate or a glass plate. A power input interface, a power switch, a power indicator light, and a temperature adjustment device are usually provided at the border of the food warming plate. The temperature adjustment device is usually a knob, a slide knob, or a button. Some food warming plates are constant power warming plates without an external temperature adjustment device.

[0003] Currently, the household food warming plates on the market are all single-layer, and can only be directly placed flat on the dining table. The use space is limited. When there are more dishes, it is difficult to place more dishes at the same time, and it is difficult to meet the use requirements of large-usage families.

[0004] Generally, it is difficult to lay two single-layer food warming plates flat on the limited dining table space. Even if two independent single-layer warming plates can be placed, the power cords of the two food warming plates will also occupy a lot of use space, hindering the flexibility of people's dining. Summary of the Invention

[0005] The purpose of the present invention is to provide a food warming plate that saves space.

[0006] To achieve the above purpose, the present invention provides a food warming plate, which includes a first plate body having a first heating element and a second plate body having a second heating element. At least two foldable feet distributed along the circumference are installed on the first plate body, and foot seats distributed along the circumference are installed on the second plate body. A concave cavity is provided on the upper side of the foot seat. When the feet are in the extended state, the feet can be inserted into the concave cavity. At least one bottom of the feet is provided with a first electrode, and the first heating element is electrically connected to the first electrode through a first wire located in the pin. At least one socket matching the first electrode is provided in the concave cavity, and a second electrode is provided on the socket. When the feet are inserted into the concave cavity, the first electrode is connected to the second electrode.

[0007] Thus, it can be seen that the first plate body can be installed on the second plate body in a stacked manner, thereby maximizing the use of the desktop space and facilitating the placement of more dishes on the limited desktop. In addition, the first heating element of the first plate body is connected to the second electrode located on the second plate body through the first wire and the first electrode to obtain electric energy. The entire double-layer food warming plate only requires one external power cord, further saving space. Moreover, as the power cord connecting the first plate body and the second plate body, the first wire is hidden in the feet, reducing the chance of being touched by people and improving the use safety.

[0008] Further, the foot is mounted on the first plate body through a folding joint. The folding joint includes a base and a movable block. The base is fixed on the first plate body, and the first end of the pin of the foot is fixed on the movable block through socket connection. A first groove extending in the unfolding direction and a second groove extending in the folding direction are provided in the base. The unfolding direction intersects with the folding direction. The rotating shaft is fixed on the base and located at the intersection of the first groove and the second groove. The rotating shaft is perpendicular to the plane formed by the unfolding direction and the folding direction. The movable block is rod-shaped. A long hole extending along its axis direction is provided at the first end of the movable block. The rotating shaft passes through the long hole, and a pin rod is fixed at the second end of the movable block. The tension spring is located in the cavity of the movable block. One end of the tension spring is hooked on the rotating shaft, and the other end of the tension spring is hooked on the pin rod. When the movable block is inserted into the first groove, the tension spring is at the first stretching length, the rotating shaft is close to the second end of the long hole, the movable block is in the extended state, and the first groove prevents the movable block from swinging; when the movable block is located in the second groove, the tension spring is at the second stretching length, the rotating shaft is close to the first end of the long hole, and the movable block is in the folded state; the first stretching length is less than the second stretching length.

[0009] It can be seen that when the movable block is inserted into the first groove, it is positioned by the first groove, which can effectively prevent the foot from swinging and improve the structural stability of the food warming plate. When the movable block is pulled out of the first groove and the foot is rotated around the rotating shaft and folded towards the second groove, the foot is closely attached to the first plate body, which is convenient for saving storage space. When the first plate body is in the folded state, the first electrode can still obtain electric energy through the power cord with a socket, so that the first heating element works normally. The first plate body and the second plate body can work independently or in a stacked combination, with flexible use.

[0010] Further, when in the folded state, the second end of the pin points to the middle of the food warming plate. This is beneficial to saving the occupied area after folding and can also obtain a larger support span when unfolded, improving the overall structural stability.

[0011] Further, at least one of the movable blocks is provided with an avoidance opening at its first end. When the movable block is inserted into the first groove, the avoidance opening is located on the side facing the second groove, and an avoidance notch is provided at the position of the first groove facing the avoidance opening. This is beneficial for the first wire to pass through the inside of the folding joint, further reducing the exposure of the first wire and further improving the use safety.

[0012] Further, the foot includes an end cover provided at the second end of the pin. At least one end cover is provided with a first electrode penetrating through its two end faces. The first wire passes through the inner cavity of the pin, the cavity of the movable block, the first groove, the avoidance opening and the avoidance notch, so that the first electrode is electrically connected to the first heating element. The first wire is buried in the pin, avoiding the exposure of the first wire, improving the use safety, and also being convenient for assembly and maintenance, improving the production efficiency and maintenance efficiency.

[0013] Furthermore, the axis of the first electrode extends along the axis direction of the pin where it is located. This facilitates the use of a conventional male-female plug-in structure for the first electrode and the second electrode, thereby reducing production costs.

[0014] Furthermore, the outer end of the first electrode does not extend beyond the end surface of the foot, so as to protect the first electrode and reduce the probability of damage caused by external friction or collision.

[0015] Furthermore, the foot base is provided with a drainage hole connected to the cavity, which can effectively prevent the cavity from overflowing and prevent the first electrode and the second electrode from leaking electricity.

[0016] Furthermore, the socket is in an island shape in the cavity, the protection switch is installed on the foot, the outer end of the trigger button of the protection switch extends through the wall of the cavity to the interior of the cavity, the protection switch is a normally open switch, and when the foot is inserted into the cavity, the foot forces the protection switch to turn on by pressing the trigger button, thereby allowing the first heating element to obtain electrical energy.

[0017] It can be seen that when the foot is not inserted into the concave cavity, the second electrode is disconnected, reducing the risk of leakage. The protection switch is triggered by the foot to achieve automation of the protection switch and improve usage efficiency.

[0018] Another further step is that the socket is island-shaped in the concave cavity, and the top of the socket is provided with a mounting hole along its circumference. The waterproof cover is made of an elastic colloid in one piece, and has a sheet-shaped top and a column extending from the top in a direction away from the top. A locking convex ring is provided on the column. When the column is inserted into the mounting hole, the locking convex ring prevents the column from falling out of the mounting hole. The top seals and shields the second electrode in the socket, and a normally closed incision is provided at the top facing the second electrode. When the foot is inserted into the concave cavity, the first electrode passes through the incision and connects with the second electrode. A spherical concave portion is provided at the incision. When the column is inserted into the mounting hole, the spherical concave portion is located on the side facing the second electrode. Normally, the second electrode is shielded, which is effectively waterproof and dustproof, and the elastic normally closed incision plays a role in cleaning and circumferential sealing of the inserted first electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an enlarged stereoscopic view of the folding joint embodiment 1 in a folded state;

[0020] Figure 2 yes Figure 1 AA section view;

[0021] Figure 3 is an enlarged stereoscopic view of the folding joint embodiment 1 in an extended state;

[0022] Figure 4 yes Figure 3 BB cross-sectional view;

[0023] Figure 5It is an enlarged three-dimensional view of the folding joint embodiment 2 in the folded state

[0024] Figure 6 It is a three-dimensional view of the food warming plate;

[0025] Figure 7 It is another three-dimensional view of the food warming plate;

[0026] Figure 8 It is a three-dimensional view of the first food warming plate in the extended state;

[0027] Figure 9 It is a disconnection view after the foot for power taking is sleeved with the movable block;

[0028] Figure 10 It is Figure 9 A view with pins omitted;

[0029] Figure 11 It is a three-dimensional view of the first food warming plate in the folded state;

[0030] Figure 12 It is a three-dimensional view of the first food warming plate in the folded state and powered by a plug;

[0031] Figure 13 It is a front view of the first food warming plate in the folded state and powered by a plug;

[0032] Figure 14 It is a three-dimensional view of the second food warming plate;

[0033] Figure 15 It is Figure 14 Partial enlarged view M of;

[0034] Figure 16 It is Figure 14 A view after installing the waterproof cover;

[0035] Figure 17 It is Figure 16 C-C sectional view of;

[0036] Figure 18 It is Figure 17 Enlarged view N of;

[0037] Figure 19 It is an enlarged three-dimensional view of the waterproof cover;

[0038] Figure 20 It is a three-dimensional view of the second food warming plate with a protective cover installed. Detailed implementation mode

[0039] The present invention will be described in detail below with reference to the accompanying drawings.

[0040] Folding joint embodiment 1

[0041] As shown Figure 1-2 in the figure, the folding joint 100 is in the folded state.

[0042] As shown Figure 3-4 in the figure, the folding joint 100 is in the extended state.

[0043] The folding joint 100 is used for the foot folding of the food warming plate. The folding joint 100 includes a base 110 and a movable block 120. A first groove 101 extending along the unfolding direction 01 and a second groove 102 extending along the folding direction 02 are provided in the base 110. The unfolding direction 01 intersects with the folding direction 02. A rotating shaft 111 is fixed on the base 110 at the intersection of the first groove 101 and the second groove 102, and is perpendicular to the plane formed by the unfolding direction 01 and the folding direction 02. The movable block 120 is rod-shaped. A long hole 121 extending along its axis is provided at the first end of the movable block 120. The rotating shaft 111 passes through the long hole 121, and a pin rod 122 is fixed at the second end of the movable block 120. A tension spring 130 is located in the cavity of the movable block 120. One end of the tension spring 130 is hooked on the rotating shaft 111, and the other end of the tension spring 130 is hooked on the pin rod 122. When the movable block 120 is inserted into the first groove 101, the tension spring 130 is at the first stretched length, the rotating shaft 111 is close to the second end of the long hole 121, the movable block 120 is in the extended state, and the first groove 101 prevents the movable block 120 from swinging. When the movable block 120 is located in the second groove 102, the tension spring 130 is at the second stretched length, the rotating shaft 111 is close to the first end of the long hole 121, and the movable block 120 is in the folded state. The first stretched length is less than the second stretched length.

[0044] Preferably, the movable block 120 is provided with an avoidance opening 123 at its first end. When the movable block 120 is inserted into the first groove 101, the avoidance opening 123 is located on the side facing the second groove 102. An avoidance notch 113 is provided at the position of the first groove 101 facing the avoidance opening 123.

[0045] The first wire 001 can pass through the cavity of the movable block 120, the first groove 101, the avoidance opening 123 and the avoidance notch 113.

[0046] Preferably, a reinforcing rib 112 is provided at the top of the base 110 near the avoidance notch 113.

[0047] Preferably, the unfolding direction 01 and the folding direction 02 form a 90-degree angle. Obviously, the angle formed by the unfolding direction 01 and the folding direction 02 is not limited to 90 degrees, and can also be other angles such as acute angles or obtuse angles, for example: 80 degrees or 105 degrees.

[0048] Preferably, the movable block 120 is square rod-shaped, and the first groove 101 is a square groove matching it to increase the contact interface and improve the structural stability.

[0049] Preferably, the first groove 101 is provided with a rib 114, and the second groove 102 is provided with a rib 115. This is beneficial to increasing the structural strength of the base, and at the same time reducing the sliding resistance between the base 110 and the movable block 120 or the feet.

[0050] Folding joint embodiment 2

[0051] As Figure 5 described, the difference between this embodiment and the foregoing embodiment is that there is no avoidance notch and corresponding reinforcing rib on the base 210 of the folding joint 200, and there is no avoidance opening on the movable block 220. This can simplify the mold manufacturing process and save manufacturing costs.

[0052] Food warming plate embodiment:

[0053] As Figure 6 and Figure 7 shown, the food warming plate 1000 includes a first food warming plate 1100 and a second food warming plate 1200.

[0054] The first food warming plate 1100 includes a first plate body 1110 and a first heating element (not shown in the figure) installed in the first plate body 1110. The switch 1111 is used to control the on-off of the first heating element. The indicator light 1112 is used to indicate the on-off of the first heating element. The first heating element is covered with a heat-resistant plate 1113.

[0055] The second food warming plate 1200 includes a first plate body 1210 and a second heating element (not shown in the figure) installed in the second plate body 1210. The switch 1211 is used to control the on-off of the second heating element. The indicator light 1212 is used to indicate the on-off of the second heating element. The second heating element is covered with a heat-resistant plate 1213. The power input socket 1220 is used to input electric energy to the second food warming plate 1000. The second plate body 1210 has four feet 1230, and the feet 1230 are distributed along the circumferential direction of the second plate body 1210.

[0056] Preferably, the heat-resistant plates 1113 / 1213 are made of ceramic, glass or metal.

[0057] The first heating element and the second heating element are preferably made of carbon fiber filaments. The first heating element and the second heating element can also be heating elements such as metal resistance wires, silicon molybdenum rods, silicon carbide rods, conductive coatings or electrothermal films.

[0058] As Figure 8 shown, the first food warming plate 1100 has four folding joints. Preferably, one of them is the folding joint 100 and three of them are the folding joints 200. This can reduce the production cost.

[0059] The foot part includes one foot part 1120 for taking power and three foot parts 1121 that do not need to take power.

[0060] The foot part 1120 includes a pin 1130 and an end cap 1140 located at the second end of the pin 1130. An anti-misinsertion slot 1142 is provided on the end cap 1140. The pin 1130 is in the shape of a square bar and is preferably made of a square tube.

[0061] Preferably, a corresponding avoidance notch 1133 is provided at the position of the pin 1130 facing the avoidance opening 123 of the movable block 120.

[0062] The difference between the foot part 1121 and the foot part 1120 is that a simplified end cap 1150 is installed on the foot part 1121, and there is no avoidance notch on the pin 1122 of the foot part 1121.

[0063] See Figure 9 , as an improvement, a corresponding long hole 1131 is provided at the position of the pin 1130 facing the long hole 121 of the movable block 120.

[0064] Preferably, a retaining groove 125 is provided between the long hole 121 and the pin mounting hole 124 on the movable block 120. A peninsula-shaped retaining piece 1132 is provided at the position of the pin 1130 facing the retaining groove 125.

[0065] After the pin 1130 is sleeved on the movable block 120, the retaining piece 1132 is plastically deformed by pressing and is pressed into the retaining groove 125, so as to effectively prevent the movable block 120 from disengaging from the pin 1130. That is, the first end of the pin 1130 of the foot part 1120 is fixedly installed on the movable block 120 through socket connection.

[0066] Preferably, the end cap 1140 is installed on the pin 1130 by interference fit.

[0067] See Figure 8 and Figure 10 , a first electrode 1141 penetrating through its two end faces is provided on the end cap 1140. The axis of the first electrode 1141 extends along the axis direction of the pin 1130 where it is located, and the outer end of the first electrode 1141 does not extend beyond the end face of the foot part 1120.

[0068] See Figure 2 , Figure 4 Figure 8 and Figure 10 , a first wire 001 passes through the inner cavity of the pin 1130, the cavity of the movable block 120, the first groove 101, the avoidance opening 123 and the avoidance notch 113, so that the first electrode 1141 is electrically connected to a first heating element (not shown).

[0069] See Figure 11 and Figure 12, the folding joints 100 / 200 of the first food warming plate 1100 are circumferentially distributed along the first plate body 1110, and the folding joints are fixed to the first plate body 1110 through the bases 110 / 210. When in the folded state, the second ends of the pins 1130 / 1122 point to the middle of the first food warming plate 1100. A space for installing the plug 1160 is reserved between the end cap 1140 and the end cap 1150.

[0070] Preferably, anti-slip pads 002 are fixed to the bottoms of the bases of the folding joints.

[0071] As Figure 13 shown, obviously, when the folding joint is in the folded state, the base of the joint serves as the supporting feet of the first food warming plate 1100, and the plug 1160 will not contact the dining table, improving the safety of use.

[0072] As Figure 14 shown, the footrest 1230 includes a footrest 1231 for power conduction and a footrest 1235 not for power conduction.

[0073] A concave cavity 1232 is provided on the upper side of the footrest 1231. When the movable block 120 is in the extended state, the foot part 1120 can be inserted into the concave cavity 1132. A drain hole 1233 communicating with the concave cavity 1232 is provided on the footrest 1231.

[0074] A concave cavity 1236 is provided on the upper side of the footrest 1235. When the movable block 220 is in the extended state, the foot part 1121 can be inserted into the concave cavity 1136. A drain hole 1237 communicating with the concave cavity 1236 is provided on the footrest 1235.

[0075] A socket 1240 matching the first electrode 1141 is provided in the concave cavity 1136.

[0076] See Figures 15 to 19 , the socket 1240 is in an island shape in the concave cavity 1136. The protection switch 1234 is installed on the footrest 1235, and the outer end part 11350 of its trigger button extends into the interior of the concave cavity 1136 through the wall of the concave cavity 1136. The protection switch 1234 is a normally open switch. When the foot part 1120 is inserted into the concave cavity 1136, the foot part 1120 presses the trigger button to force the protection switch 1234 to close, thereby allowing the first heating element (not shown) to obtain electric energy.

[0077] The top of the socket 1240 is provided with mounting holes 1243 along its circumferential direction. The waterproof cover 1250 is integrally made of an elastic colloid and has a sheet-shaped top 1251 and a column 1252 extending from the top 1251 in a direction away from the top 1251. A locking convex ring 1253 is provided on the column 1252. When the column 1253 is inserted into the mounting hole 1243, the locking convex ring 1253 prevents the column 1252 from being disengaged from the mounting hole 1243, and the top 1251 seals and shields the second electrode 1241 inside the socket 1240. A normally closed notch 1252 is provided at the position where the top 1251 faces the second electrode 1241. When the foot 1120 is inserted into the cavity 1136, the first electrode 1141 passes through the notch 1252 to connect with the second electrode 1241. A spherical concave portion 1254 is provided at the notch 1252. When the column 1252 is inserted into the mounting hole 1243, the spherical concave portion 1254 is located on the side facing the second electrode 1241.

[0078] As Figure 20 shown, when the second food warming plate 1200 is used alone, a protective cover 1260 can be installed on the cavity of the footrest to prevent sundries from entering the cavity of the footrest.

[0079] Obviously, the first food warming plate 1100 and the second food warming plate 1200 can be used independently respectively, or can be stacked and combined into a double-deck food warming plate and used as a whole.

[0080] Obviously, when the movable block of the folding joint is in the extended state, the feet of the first food warming plate are also in the extended state. When the movable block of the folding joint is in the folded state, the feet of the first food warming plate are also in the folded state.

[0081] In the above embodiments, the first food warming plate has 4 feet. As a variant embodiment, the first food warming plate can have 2, 3, 5 or even more feet and folding joints corresponding to each foot. At least one foot can transfer electric energy from the second food warming plate to the first food warming plate.

[0082] As another variant, the foldable feet for taking power for the first food warming plate are not limited to one, and can also be two or more. Sockets corresponding to the feet for taking power are provided in the cavity of the footrest of the second food warming plate.

[0083] As another optimization, the first wire passes through the inner cavity of the pin and then enters the first plate body from the bottom plate of the first plate body without passing through the inside of the folding joint, which can further simplify the structure of the folding joint and reduce the production cost.

[0084] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. Food warming plate, comprising a first plate body with a first heating element and a second plate body with a second heating element, characterized in that: At least two foldable feet are installed on the first plate body and distributed along its circumference; A footrest is installed on the second plate body and distributed along its circumference; A concave cavity is provided on the upper side of the footrest. When the feet are in the extended state, the feet can be inserted into the concave cavity; A first electrode is provided at the bottom of at least one of the feet; The first heating element is electrically connected to the first electrode through a first wire located inside the foot; At least one socket matching the first electrode is provided in the concave cavity, and a second electrode is provided on the socket; When the foot is inserted into the concave cavity, the first electrode is connected to the second electrode; The foot is installed on the first plate body through a folding joint; The folding joint includes a base and a movable block; The base is fixed on the first plate body; The first end of the pin of the foot is fixed on the movable block through socket connection; A first groove extending in the unfolding direction and a second groove extending in the folding direction are provided in the base; The unfolding direction intersects with the folding direction; A rotating shaft is fixed on the base, located at the intersection of the first groove and the second groove, and is perpendicular to the plane formed by the unfolding direction and the folding direction; The movable block is rod-shaped. A long hole extending along its axis direction is provided at the first end of the movable block. The rotating shaft passes through the long hole, and a pin rod is fixed at the second end of the movable block; A tension spring is located in the cavity of the movable block. One end of the tension spring is hooked on the rotating shaft, and the other end of the tension spring is hooked on the pin rod; When the movable block is inserted into the first groove, the tension spring is at the first stretching length, the second end of the rotating shaft is close to the long hole, the movable block is in the extended state, and the first groove prevents the movable block from swinging; When the movable block is located in the second groove, the tension spring is at the second stretching length, the first end of the rotating shaft is close to the long hole, and the movable block is in the folded state; The first stretching length is less than the second stretching length; A protection switch is installed on the footrest, and the outer end of its trigger button extends into the interior of the concave cavity through the wall of the concave cavity.

2. The food warming plate according to claim 1, characterized in that: When in the folded state, the second end of the pin points to the middle of the food warming plate.

3. The food warming plate according to claim 1, characterized in that: At least one of the movable blocks is provided with an avoidance opening at its first end; When the movable block is inserted into the first groove, the avoidance opening is located on the side facing the second groove; An avoidance notch is provided at the position of the first groove facing the avoidance opening.

4. The food warming plate according to claim 3, characterized in that: The foot includes an end cap provided at the second end of the pin, and the first electrode penetrating through its two end faces is provided on at least one of the end caps. The first wire passes through the inner cavity of the pin, the cavity of the movable block, the first groove, the avoidance opening and the avoidance notch, so that the first electrode is electrically connected to the first heating element.

5. The food insulation board according to claim 4, characterized in that: The axis of the first electrode extends along the axis direction of the pin where the first electrode is located.

6. The food insulation board according to claim 5, characterized in that: The outer end of the first electrode does not extend beyond the end surface of the leg.

7. The food insulation board according to claim 5, characterized in that: The foot base is provided with a drainage hole communicated with the concave cavity.

8. The food insulation board according to claim 5, characterized in that: The socket is in an island shape in the cavity; The protection switch is a normally open switch. When the foot is inserted into the cavity, the foot forces the protection switch to turn on by pressing the trigger button, thereby allowing the first heating element to obtain electrical energy.

9. The food insulation board according to claim 5, characterized in that: The socket is in an island shape in the cavity; The top of the socket is provided with mounting holes along its circumference; The waterproof cover is made of elastic colloid in one piece and has a sheet-shaped top and a column extending from the top in a direction away from the top; The column is provided with a locking convex ring, and when the column is inserted into the mounting hole, the locking convex ring prevents the column from falling out of the mounting hole, and the top seals and shields the second electrode in the socket; A normally closed incision is provided at a position of the top facing the second electrode, and when the foot is inserted into the concave cavity, the first electrode passes through the incision and is connected to the second electrode; The cutout portion is provided with a spherical concave portion, and when the column is inserted into the mounting hole, the spherical concave portion is located on the side facing the second electrode.

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