CN212590807U

CN212590807U - Wireless heating lunch box

Info

Publication number: CN212590807U
Application number: CN202021129183.4U
Authority: CN
Inventors: 郑燕雄; 吕宗权; 周祥勋
Original assignee: NINGBO AIJIA ELECTRICAL APPLIANCE CO Ltd
Current assignee: NINGBO AIJIA ELECTRICAL APPLIANCE CO Ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2021-02-26
Anticipated expiration: 2030-06-17

Abstract

The utility model relates to a wireless heating lunch-box, include: the base is provided with a power supply unit and a first electric connection terminal electrically connected with the power supply unit; the lunch box main body is detachably connected to the base, and is provided with a heating unit and a second electric connection terminal electrically connected with the heating unit; the lunch box body and the base are locked together through the locking structure, and in a locking state, the first electric connection terminal of the base is electrically communicated with the second electric connection terminal of the lunch box body. The lunch box main body and the base are independent parts which can be detachably connected, and the lunch box main body can be taken down relative to the base and is convenient to clean. When the lunch box main part is assembled on the base, can be in the same place through the restraint of locking structure again between the two, can not appear rocking the problem between the two, can guarantee to realize reliable power supply between the second electrical connection terminal of lunch box main part and the first electrical connection terminal of base, make the heating unit in the lunch box main part heat food.

Description

Wireless heating lunch box

Technical Field

The utility model relates to an edible tableware technical field especially relates to a wireless heating lunch-box.

Background

The common lunch box only has the function of heat preservation, and the meal can be cooled off after a long time, which affects the eating. Some heatable lunch boxes appear on the market, one type is that the power cord is connected with an external power supply to provide electric energy for heating, and the other type is that batteries are arranged in the lunch boxes and the batteries are used for supplying power for heating. The two lunch boxes can cause internal short circuit once water enters the lunch boxes when being cleaned, and the safety problem is easy to occur. Moreover, when the lunch box is out, the use of the lunch box is limited because the lunch box externally connected with the power line needs a power socket.

In order to solve the technical problem, a chinese patent application No. CN201610187106.6 (with an authority publication No. CN105852370B) discloses a lunch box, which includes a base and an inner box, wherein the base includes a first bottom and a first side wall, the first bottom and the first side wall enclose a first accommodating space, the inner box is detachably mounted at the first bottom and is accommodated in the base, a first heating element is disposed at a position of the inner box close to the first bottom, a storage battery is disposed in the base, the storage battery is electrically connected with the first heating element, and the first heating element is in a sheet shape and comprises a material with uniform heating characteristics. Under open air or some special environment, the user can place the base with the interior box of lunch-box on, and then heats interior box by the electric energy that storage battery on the base stocked, and this kind of lunch-box is healthy environmental protection and convenient the washing, is difficult for appearing the short circuit problem.

The lunch-box still has certain not enough in the above-mentioned patent, and back in the first accommodation space of base was settled to interior box in above-mentioned lunch-box, if interior box does not place in place or the problem of rocking appears in the heating process, the poor contact problem appears easily in the electrical connection terminal that leads to interior box on electrical connection terminal and the base easily, and the heat-generating body on the box just can not heat food effectively in this way, has seriously influenced user experience.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide one kind and can reliably be connected lunch-box main part and base and realize the wireless heating lunch-box of stable power supply from this.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a wireless heating lunch box comprising:

the base is provided with a power supply unit and a first electric connection terminal electrically connected with the power supply unit;

the lunch box main body is detachably connected to the base, and is provided with a heating unit and a second electric connection terminal electrically connected with the heating unit;

the lunch box body and the base are constrained together through a locking structure, and under the condition that the lunch box body and the base are in a locking state, the first electric terminal of the base is electrically communicated with the second electric terminal of the lunch box body.

In order to realize the locking of the lunch box main body and the base, the lunch box main body and the base are locked together in a threaded connection or a buckling connection mode.

In a preferred embodiment, the top of the base has a boss extending upward, the bottom of the lunch box body has a receiving groove into which the boss of the base extends, the outer peripheral wall of the boss has an external thread, the inner peripheral wall of the receiving groove has an internal thread adapted to the external thread, and the external thread of the boss is in threaded connection with the internal thread of the receiving groove to form the locking structure.

As another preferred embodiment, the top of the base has a boss extending upward, the bottom of the lunch box body has a receiving groove into which the boss of the base extends, the outer peripheral wall of the boss has a detent protruding outward in the radial direction, the inner peripheral wall of the receiving groove has a recess recessed inward in the radial direction and adapted to the detent, and the detent on the boss and the recess on the receiving groove form a limit fit to form the locking structure.

As an improvement, the first electric terminal is arranged at the top of the boss, and the second electric terminal is arranged at the bottom of the accommodating groove. After the base is assembled with the lunch box main body, the first electric connection terminal on the base can be effectively contacted and communicated with the second electric connection terminal.

In order to assemble the heating unit conveniently, the lunch box main body comprises a lunch box shell and an inner container, the lunch box shell is provided with an accommodating cavity with an upper opening, the inner container is accommodated in the accommodating cavity, and the heating unit is arranged between the lunch box shell and the inner container.

In order to realize effective and uniform heating of the inner container, the heating unit comprises a PTC ceramic heating sheet, and the PTC ceramic heating sheet is attached to the bottom of the inner container.

In order to further improve the power supply stability between base and the lunch-box main part, first connect electrical terminal on the base is including being located annular conducting strip on the top surface of boss and the first conductive contact who is located the central point of annular conducting strip and puts, annular conducting strip with the coaxial setting of boss, second connect electrical terminal in the lunch-box main part includes second conductive contact and third conductive contact, second conductive contact with first conductive contact is corresponding, third conductive contact with annular conducting strip is corresponding. After the user places the relative base of lunch-box main part in place, no matter what kind of angle is rotated to the relative base of lunch-box main part, the second of lunch-box main part connects the electric terminal and can both realize the turn-on connection with the first of base.

In order to facilitate charging and discharging, the power supply unit comprises a lithium battery, and a charging interface and a discharging interface which are electrically connected with the lithium battery are arranged on the base. The user can charge the lithium cell alone through the interface that charges to by the lithium cell to the heating element of lunch-box main part supplies power, realize wireless power supply.

In order to facilitate the user to control the heating process or other modes of the lunch box, the lunch box further comprises a wireless transceiving module used for being in signal connection with an external control terminal. For example, the lunch box can be connected with a smart phone of a user, if the lunch box is not around temporarily, the lunch box can be heated in advance through the mobile phone APP, and the user experience is improved due to the very humanization.

Compared with the prior art, the utility model has the advantages that: the lunch box main body and the base are independent parts which can be detachably connected, and the lunch box main body can be taken down relative to the base and is convenient to clean. When the lunch box main part is assembled on the base, can be in the same place through the restraint of locking structure again between the two, can not appear rocking the problem between lunch box main part and the base like this, therefore, can guarantee to realize reliable power supply between the second electrical connection terminal of lunch box main part and the first electrical connection terminal of base, make the heating unit in the lunch box main part carry out the steady heating to food.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

FIG. 2 is a schematic structural view of the lunch box of the embodiment of the present invention in a state where the lunch box main body is removed from the base;

FIG. 3 is an exploded view of the lunch box body according to the embodiment of the present invention;

fig. 4 is an exploded view of a base according to an embodiment of the present invention;

fig. 5 is a longitudinal sectional view of an embodiment of the present invention (locking by means of a threaded connection);

fig. 6 is a longitudinal sectional view (locking by snap connection) of the embodiment of the present invention.

Reference numerals: 10. a base; 11. a base body; 12. a boss; 120. an external thread; 121. a clamping block; 122. an annular groove; 13. a base lower cover; 14. a lithium battery; 15. a first electrical terminal; 151. a first conductive contact; 152. an annular conductive sheet; 16. a charging interface; 17. a control panel; 18. a wireless transceiver module; 19. a PCB board; 20. a lunch box main body; 21. a lunch box shell; 22. a receiving groove; 220. an internal thread; 221. a recess; 23. a lunch box cover body; 24. an inner container; 25. a second electrical terminal; 251. a second conductive contact; 252. a third conductive contact; 26. PTC ceramic heating plate.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1 to 6, a wireless heating lunch box includes a base 10 and a lunch box body 20. The lunch box body 20 is used for containing food. The base 10 is provided with a power supply unit and a first electrical terminal 15 electrically connected to the power supply unit. The lunch box body 20 is provided with a heating unit and a second electrical connection terminal 25 electrically connected to the heating unit on the lunch box body 20. The lunch box main body 20 can be placed on the base 10, and the heating unit on the lunch box main body 20 is supplied with power by the power supply unit on the base 10, thereby realizing that the heating unit heats the lunch box main body 20. The lunch box body 20 can be removed from the base 10 and cleaned.

Referring to fig. 2 and 5, a locking structure for locking the lunch box main body 20 and the base 10 is provided therebetween. In a state where the lunch box body 20 and the base 10 are locked together, the first electrical terminal 15 of the base 10 may electrically communicate with the second electrical terminal 25 of the lunch box body 20.

Referring to fig. 3, the lunch box body 20 includes a lunch box case 21, a lunch box cover 23, an inner container 24, and a heating unit. The lunch box main body 20 of the present embodiment may have a generally cylindrical structure or a square structure as a whole.

The lunch box case 21 has an accommodating chamber with an upper opening. The inner container 24 can be loaded into the containing cavity from the upper opening of the lunch box shell 21. The case cover 23 can be closed on the upper portion of the inner container 24 to keep the temperature during the heating process.

Referring to fig. 3 and 5, the heating unit is disposed between the lunch box case 21 and the inner container 24. In the present embodiment, the heating unit includes a PTC ceramic heating sheet 26, and specifically, the PTC ceramic heating sheet 26 is attached to the bottom of the inner container 24, so as to ensure the uniformity of heating of the inner container 24. The PTC ceramic heater chip 26 can be adapted to the power supply environment of the low-voltage dc mobile power supply.

Referring to fig. 2, the bottom of the lunch box case 21 has a receiving groove having a hole-groove structure with a circular cross section. The inner peripheral wall of the receiving groove 22 is provided with an internal thread 220, and the internal thread 220 is screw-engaged with the external thread 120 on the outer peripheral wall of the boss 12 of the base 10.

With continued reference to FIG. 2, second electrical terminals 25 are disposed on the bottom surface of the pockets. The second electrical terminal 25 includes a second conductive contact 251 and a third conductive contact 252. The second conductive contact 251 is located at the center of the bottom surface of the receiving slot, and the third conductive contact 252 is located at a position on the bottom surface of the receiving slot that is offset from the center by a certain distance.

Referring to fig. 4, the base 10 includes a base body 11, a base lower cover 13, a PCB board 19, a wireless transceiving module 18, and a power supply unit. The base body 11 has an accommodation chamber with an open lower portion. The PCB 19, the power supply unit and the wireless transceiver module 18 can be installed from the lower opening of the base body 11, and then are covered by the base lower cover 13. The power supply unit and the wireless transceiver module 18 are electrically connected with the PCB 19.

Referring to fig. 2 and 4, the base body 11 has a boss 12 extending upward at the top at the bottom. The boss 12 is a cylindrical boss 12 which can be inserted into a receiving groove 22 at the bottom of the lunch box housing 21. Specifically, the outer peripheral wall of the boss 12 has an external thread 120 fitted to an internal thread 220 on the inner peripheral wall of the receiving groove 22. The boss 12 of the base 10 and the receiving groove 22 of the lunch box main body 20 are in threaded connection, so that the two can be locked, and reliable fixed connection can be realized.

Referring to fig. 6, as another embodiment, the boss 12 of the base 10 and the receiving groove 22 of the lunch box body 20 may be locked by a snap structure. Specifically, the top of the outer peripheral wall of the boss 12 is provided with a latch 121 protruding radially outward, and the inner peripheral wall of the receiving groove 22 is provided with a recess 221 structure recessed radially inward for the latch 121 to be latched therein.

Referring to fig. 1, the base 10 and the lunch box main body 20 of the present embodiment may both have a cylindrical structure, and after the base 10 and the lunch box main body 20 are fitted together, the outer peripheral wall of the base 10 is flush with or smoothly transits to the outer peripheral wall of the lunch box main body 20 at the joint position.

Referring to fig. 2 and 4, the first electrical terminals 15 are correspondingly provided on the top surfaces of the bosses 12 of the base body 11. The first electrical terminal 15 includes an annular conductive piece 152 and a first conductive contact 151, wherein the top surface of the boss 12 is provided with an annular groove 122 coaxial with the boss 12, and the annular conductive piece 152 is correspondingly disposed in the annular groove 122. The first conductive contact 151 is located at the center of the annular conductive plate 152. Thus, after the lunch box main body 20 and the base 10 are assembled together, the second conductive contact 251 of the lunch box main body 20 can be correspondingly connected with the first conductive contact 151 of the base 10, and the third conductive contact 252 of the lunch box main body 20 can be correspondingly connected with the annular conductive sheet 152 of the base 10. When the user puts the lunch box main body 20 in place relative to the base 10, the second electrical connection terminal 25 of the lunch box main body 20 and the first electrical connection terminal 15 of the base 10 can be connected in a conductive manner no matter what angle the lunch box main body 20 rotates relative to the base 10.

Referring to fig. 4, the power supply unit includes a lithium battery 14. The base 10 is further provided with a charging interface 16 electrically connected with the lithium battery 14. The user can charge the lithium battery 14 through the charging interface 16, so that the lithium battery 14 supplies power to the heating unit of the lunch box main body 20, and wireless power supply is realized.

Referring to fig. 4, the transceiver module 18 is electrically connected to the PCB 19, and a commercially available transceiver module 18 may be used. The wireless transceiver module 18 may be specifically in signal connection with an external control terminal. For example, can be connected with user's smart mobile phone, if the lunch-box is temporarily not nearby, also can heat the setting to it in advance through cell-phone APP, unusual hommization has improved user experience.

Referring to fig. 1, the base body 11 is further provided with a control panel 17 having a display function, which is used for displaying the working information of the lunch box and simultaneously performing direct touch control on the lunch box. Specifically, the user can set various heating modes including heating time, heating temperature, heating schedule, and the like for the lunch box through the control panel 17.

The wireless heating lunch-box of this embodiment's advantage: the lunch box main body 20 and the base 10 are independent parts which can be detachably connected, and the lunch box main body 20 can be taken down relative to the base 10, so that the lunch box is convenient for a user to clean. When the lunch box main body 20 is assembled on the base 10, the lunch box main body 20 and the base 10 can be restrained together through the locking structure, so that the problem of shaking cannot occur between the lunch box main body 20 and the base 10, and therefore reliable power supply can be guaranteed between the second power connection terminal 25 of the lunch box main body 20 and the first power connection terminal 15 of the base 10, and the heating unit in the lunch box main body 20 can stably heat food.

Claims

1. A wireless heating lunch box comprising:

a base (10), wherein the base (10) is provided with a power supply unit and a first electric terminal (15) electrically connected with the power supply unit;

the lunch box main body (20) is detachably connected to the base (10), and a heating unit and a second electric connection terminal (25) electrically connected with the heating unit are arranged on the lunch box main body (20);

the method is characterized in that: the lunch box comprises a lunch box body (20) and a base (10), wherein the lunch box body and the base are constrained together through a locking structure, and under the condition that the lunch box body and the base are locked, a first electric terminal (15) of the base (10) is electrically communicated with a second electric terminal (25) of the lunch box body (20).

2. The wireless heating lunch box of claim 1, wherein: the lunch box body (20) and the base (10) are locked together in a threaded connection or a buckling connection mode.

3. The wireless heating lunch box of claim 2, wherein: the top of base (10) has boss (12) that upwards extends, the bottom of lunch-box main part (20) has the confession boss (12) of base (10) stretch into storage groove (22) wherein, external screw thread (120) have on the periphery wall of boss (12), have on the internal perisporium of storage groove (22) with internal thread (220) of above-mentioned external screw thread (120) looks adaptation, the external screw thread (120) of boss (12) with the internal thread (220) of storage groove (22) carry out threaded connection thereby constitute locking structure.

4. The wireless heating lunch box of claim 2, wherein: the top of base (10) has boss (12) that upwards extends, the bottom of lunch-box main part (20) has the confession the boss (12) of base (10) stretch into storage groove (22) wherein, radial outside convex fixture block (121) have on the periphery wall of boss (12), have radial indent and with the concave part (221) of above-mentioned fixture block (121) looks adaptation on the internal perisporium of storing groove (22), fixture block (121) on boss (12) and recess (221) on storing groove (22) form spacing cooperation thereby constitute locking structure.

5. The wireless heating lunch box of claim 3 or 4, wherein: the first electric terminal (15) is arranged at the top of the boss (12), and the second electric terminal (25) is arranged at the bottom of the accommodating groove (22).

6. The wireless heating lunch box of claim 1, wherein: the lunch box body (20) comprises a lunch box shell (21) and an inner container (24), the lunch box shell (21) is provided with an accommodating cavity with an upper opening, the inner container (24) is accommodated in the accommodating cavity, and the heating unit is arranged between the lunch box shell (21) and the inner container (24).

7. The wireless heating lunch box of claim 6, wherein: the heating unit comprises a PTC ceramic heating sheet (26), and the PTC ceramic heating sheet (26) is attached to the bottom of the inner container (24).

8. The wireless heating lunch box of claim 5, wherein: first electrical terminal (15) on base (10) is including being located annular conducting strip (152) on the top surface of boss (12) and first electrically conductive contact (151) that are located the central point of annular conducting strip (152) and put, annular conducting strip (152) with boss (12) coaxial setting, second electrical terminal (25) on lunch-box main part (20) includes second electrically conductive contact (251) and third electrically conductive contact (252), second electrically conductive contact (251) with first electrically conductive contact (151) are corresponding, third electrically conductive contact (252) with annular conducting strip (152) are corresponding.

9. The wireless heating lunch box of claim 1, wherein: the power supply unit comprises a lithium battery (14), and a charging interface (16) electrically connected with the lithium battery (14) is arranged on the base (10).

10. The wireless heating lunch box of claim 1, wherein: the system also comprises a wireless transceiving module (18) used for signal connection with an external control terminal.