Portable hand warmer charging bin and hand warmer assembly

Abstract

The utility model discloses a portable hand warmer charging cabin and a hand warmer assembly, the charging cabin comprises a cabin body, and the cabin body is provided with a placing cavity used for placing a hand warmer unit for charging. A first circuit board, a first charging unit and a first battery are arranged on the bin body, and the first battery and the first charging unit are electrically connected with the first circuit board. When the hand warmer unit is placed in the placing cavity, the first circuit board is used for outputting electric energy output by the first battery from the first charging unit. And the first charging unit is used for being matched with a second charging unit on the hand warmer unit for use and transmitting the electric energy output by the first circuit board to the second charging unit on the hand warmer unit so as to charge the hand warmer unit, so that a user can carry the charging bin to charge the hand warmer unit when the hand warmer unit is short of power when going out.

Description

Technical Field

[0001] This utility model relates to the technical field of hand warmers, and in particular to a portable hand warmer charging case and hand warmer components. Background Technology

[0002] Currently available hand warmers, whether double-sided or single-sided, typically only provide warmth to one hand or one body part. They are difficult to use simultaneously for both hands or multiple body parts, especially when users need to perform different actions or warm multiple parts of their body. Furthermore, existing hand warmers require an external power source, which is often difficult to find, particularly outdoors. Therefore, there is an urgent need for a portable charging case that can also power hand warmers. Utility Model Content

[0003] The main purpose of this utility model is to provide a portable hand warmer charging case and hand warmer components to solve the problem of inconvenient charging of existing hand warmers outdoors.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0005] A portable hand warmer charging case includes a case body, wherein the case body has a placement cavity for placing and charging the hand warmer unit;

[0006] The chamber is provided with a first circuit board, a first charging unit and a first battery, and the first battery and the first charging unit are both electrically connected to the first circuit board.

[0007] When the hand warmer unit is placed in the placement cavity, the first circuit board is used to output the electrical energy output by the first battery from the first charging unit; the first charging unit is used to be adapted to the second charging unit on the hand warmer unit and to transmit the electrical energy output by the first circuit board to the second charging unit on the hand warmer unit.

[0008] Furthermore, the first charging unit is a conductive probe, which is disposed at the bottom of the placement cavity.

[0009] The first circuit board is provided with an indicator light unit for indicating the power status of the first battery and / or the charging status of the hand warmer unit.

[0010] Furthermore, the indicator light unit includes multiple light-emitting elements disposed on the first circuit board, and the multiple light-emitting elements are arranged side by side;

[0011] The chamber is also provided with a light guide cover, and the light guide cover has a receiving groove at the position corresponding to each light-emitting element. The light-emitting element is located in the receiving groove. The light guide cover has a first light guide hole that communicates with the receiving groove. The chamber has a second light guide hole at the position corresponding to the first light guide hole.

[0012] Furthermore, the indicator unit includes a power indicator and a charging status indicator, with the charging status indicator located next to the power indicator.

[0013] Furthermore, the first circuit board is provided with function buttons, and the chamber is provided with a pressing component connected to the function buttons. When the function buttons are operated, the first circuit board outputs electrical energy to the first charging unit.

[0014] The first circuit board is provided with a first charging interface, and the compartment is provided with a first clearance hole for avoiding the first charging interface;

[0015] The indicator light unit, function button, and first charging interface are arranged side by side along the thickness direction of the charging compartment, with the function button located between the indicator light unit and the first charging interface.

[0016] Furthermore, the compartment includes a main body and a cover connected to the main body to form a placement cavity;

[0017] The placement cavity includes a first placement groove, and the conductive probe is disposed at the bottom of the first placement groove. The main body includes a first outer cover and a first inner shell connected to the first outer cover to form the first placement groove, the first mounting cavity, and the second mounting cavity. The first inner shell is located inside the first outer cover, and the first mounting cavity is located below the first placement groove. The first circuit board is disposed in the first mounting cavity. The first battery is disposed in the second mounting cavity, which is located behind the first placement groove. The pressing member, the first clearance hole, and the second light guide hole are all located on the first outer cover.

[0018] The cover is rotatably connected to the main body;

[0019] The placement cavity includes a second placement groove, and the cover includes a second outer cover and a second inner shell connected to the second outer cover to form the second placement groove, wherein the second inner shell is at least partially located inside the second outer cover.

[0020] The bottom of the second outer cover extends downward to form a connecting panel, and the two sides of the connecting panel protrude to form a pivot portion;

[0021] The connection between the first outer cover and the first inner shell also forms a limiting rotating hole, and the rotating shaft is placed in the limiting rotating hole.

[0022] This utility model also provides a hand warmer component, including at least one hand warmer unit and a charging case as described above;

[0023] The hand warmer unit is equipped with a second circuit board, a heating element, a second battery, and a second charging unit. The heating element, the second battery, and the second charging unit are all electrically connected to the second circuit board.

[0024] When the hand warmer unit is placed in the placement cavity, the second charging unit is close to or in contact with the first charging unit. The first charging unit is used to output the electrical energy output from the first circuit board to the second charging unit. The second charging unit charges the second battery with the electrical energy output from the first charging unit after passing through the second circuit board.

[0025] Furthermore, the first charging unit is a conductive probe, which is disposed at the bottom of the placement cavity; the second charging unit is a charging contact, which is located at the bottom of the hand warmer unit, and the charging contact contacts the conductive probe when the hand warmer unit is placed in the placement cavity.

[0026] The hand warmer unit has an inward recess at the position of the corresponding charging contact to form a groove, and the placement cavity has an embedding block at the position of the corresponding groove. The embedding block is placed in the groove when the hand warmer unit is placed in the placement cavity.

[0027] Furthermore, the number of hand warmer units is two, namely a first hand warmer and a second hand warmer; the number of placement chambers is two.

[0028] The first hand warmer and the second hand warmer are detachably connected;

[0029] The hand warmer unit is also equipped with a second charging interface for connecting an external power cord.

[0030] This utility model has the following advantages: Compared with the prior art, this utility model has a placement cavity for storing the hand warmer unit on the charging case, and a first charging unit for supplying power to the hand warmer unit is arranged on the charging case. In this way, when the hand warmer unit is placed in the placement cavity, the first charging unit can be close to or in contact with the hand warmer unit, so that the first charging unit can transfer the electrical energy output from the first battery to the second charging unit to charge the hand warmer unit. This allows users to carry the charging case when they go out and charge the hand warmer unit when it is out of power. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a perspective view of the charging compartment of this utility model;

[0033] Figure 2 This is a perspective view of the charging compartment of this utility model from another angle;

[0034] Figure 3 This is a schematic diagram showing the state of the hand warmer component of this utility model;

[0035] Figure 4 This is a partial exploded view of the hand warmer component of this utility model;

[0036] Figure 5 This is an exploded view of the main body of this utility model;

[0037] Figure 6 This is a schematic diagram of the assembly of the first inner shell and the first circuit board of this utility model;

[0038] Figure 7 This is a structural diagram of the light guide cover of this utility model;

[0039] Figure 8 This is an exploded view of the cover of this utility model;

[0040] Figure 9 This is a perspective view of the hand warmer unit of this utility model;

[0041] Figure 10 This is an exploded view of the hand warmer unit of this utility model;

[0042] Figure 11 This is a schematic diagram of the first and second hand warmers of this utility model assembled together;

[0043] Figure 12 This is an exploded view of the first and second hand warmers of this utility model. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] See attached document Figure 1-8 A portable hand warmer charging case 1 is provided in this embodiment of the present invention.

[0046] The portable hand warmer charging case 1 includes a case body 10, on which a placement cavity 3 is provided for placing and charging the hand warmer unit 2. A first circuit board 13, a first charging unit 131, and a first battery 18 are disposed on the case body 10. The first battery 18 and the first charging unit 131 are both electrically connected to the first circuit board 13. When the hand warmer unit 2 is placed in the placement cavity 3, the first circuit board 13 is used to output electrical energy from the first battery 18 through the first charging unit 131. The first charging unit 131 is adapted to be used with a second charging unit 24 on the hand warmer unit 2, and transmits the electrical energy output from the first circuit board 13 to the second charging unit 24 on the hand warmer unit 2.

[0047] In this embodiment, a placement cavity 3 for storing and placing the hand warmer unit 2 is provided on the charging compartment 1, and a first charging unit 131 for supplying power to the hand warmer unit 2 is arranged on the charging compartment 1. In this way, when the hand warmer unit 2 is placed in the placement cavity 3, the first charging unit 131 can approach or contact the hand warmer unit 2, allowing the first charging unit 131 to transfer the electrical energy output from the first battery 18 to the second charging unit 24 through the first circuit board 13, thereby charging the hand warmer unit 2. This allows users to carry the charging compartment 1 when going out and charge the hand warmer unit 2 when it is low on power, solving the problem of the inconvenience of charging the existing hand warmer unit 2 outdoors.

[0048] In one embodiment, since the hand warmer unit 2 is designed to fit the human hand, the thickness of most hand warmer units 2 is generally relatively flat. The thickness of the placement cavity 3 is adapted to the thickness of the hand warmer unit 2, that is, to make the overall shape of the charging case 1 harmonious, the first circuit board 13 is located at the bottom of the placement cavity 3, and the first battery 18 is located at the back of the case 10. Of course, in other embodiments, the first circuit board 13 and the first battery 18 may both be located at the bottom, back, or front of the placement cavity 3, or the first circuit board 13 may be located at the front of the placement cavity 3, and the first battery 18 may be located at the back of the placement cavity 3.

[0049] In one embodiment, the first circuit board 13 is provided with a power indicator light 133 unit 130 for indicating the power status of the first battery 18 and / or the charging status of the hand warmer unit 2, so that the user can know how much power the first battery 18 has and whether the hand warmer unit 2 is fully charged.

[0050] In one embodiment, the indicator light unit 130 includes a plurality of light-emitting elements 135 disposed on the first circuit board 13, with the plurality of light-emitting elements 135 arranged side by side. Of course, in other embodiments, the plurality of light-emitting elements 135 may also be arranged in a surrounding arrangement, irregularly, or in an arc distribution. Thus, when the first battery 18 has only half its charge, the first circuit board 13 can control half of the light-emitting elements 135 to emit light; when the first battery 18 is fully charged, the first circuit board 13 can control all the light-emitting elements 135 to emit light, so that the user can understand the charge level of the first battery 18. Alternatively, the color of the light emitted by the light-emitting elements 135 can also indicate the charge level of the first battery 18; for example, when the first battery 18 is fully charged, the light-emitting elements 135 emit green light, and when the first battery 18 has insufficient charge, the light-emitting elements 135 emit red light, etc. The light-emitting elements 135 may be LEDs or LED beads, etc.

[0051] In one embodiment, the housing 10 is further provided with a light guide cover 14. The light guide cover 14 has a receiving groove 141 at the position corresponding to each light-emitting element 135, and the light-emitting element 135 is located in the receiving groove 141. The light guide cover 14 has a first light guide hole 142 communicating with the receiving groove 141, and the housing 10 has a second light guide hole 1112 at the position corresponding to the first light guide hole 142. Specifically, the light guide cover 14 is made of an opaque material, that is, the light from the light-emitting element 135 can only pass through the first light guide hole 142 and then pass through the second light guide hole 1112, preventing the light from multiple light-emitting elements 135 from interfering with each other and causing poor indication effect.

[0052] In one embodiment, the indicator unit 130 includes a power indicator 133 and a charging status indicator 132, with the charging status indicator 132 located next to the power indicator 133. The power indicator 133 indicates the power level of the first battery 18 based on the number of lights emitted, while the charging status indicator 132 indicates the charging status of the hand warmer unit 2 based on the color of the emitted light, for user convenience.

[0053] In one embodiment, a function button 134 is provided on the first circuit board 13, and a pressing member 15 connected to the function button 134 is provided on the compartment 10. When the hand warmer unit 2 is placed in the placement cavity 3, the user can press the pressing member 15 to press the function button 134. The first circuit board 13 detects the electrical signal of the function button 134 and outputs electrical energy from the first charging unit 131 from the first battery 18 to control the charging of the hand warmer unit 2. Of course, by pressing the function button 134, the first circuit board 13 can also drive the indicator light to illuminate so that the user can know the remaining power of the first battery 18.

[0054] In the above embodiment, a first charging interface 136 is provided on the first circuit board 13, and a first clearance hole 1111 is provided on the housing 10 to avoid the first charging interface 136. The first charging interface 136 is used to connect to an external power source, and after connecting to a power source, the first battery 18 can be charged via the first circuit board 13, so that the user can charge the first battery 18 when the charging housing 1 is low on power. Of course, in other embodiments, the charging housing 1 can also use wireless charging to charge the first battery 18.

[0055] In one embodiment, for the sake of structural compactness and aesthetics, the indicator light unit 130, the function button 134, and the first charging interface 136 are arranged side by side along the thickness direction of the charging compartment 1, with the function button 134 located between the indicator light unit 130 and the first charging interface 136.

[0056] In the above embodiment, the housing 10 includes a main body 11 and a cover 12 connected to the main body 11 to form a placement cavity 3. The first circuit board 13, the first battery 18, the pressing member 15, the first clearance hole 1111, and the second light guide hole 1112 are all located on the main body 11. The cover 12, in cooperation with the main body 11, forms a sealed placement cavity 3. When the hand warmer unit 2 is placed on the placement slot, it can completely enclose the hand warmer unit 2, thus protecting it and facilitating its portability. Of course, in other embodiments, the cover 12 may not be necessary; therefore, the structure of the housing 10 is not limited here.

[0057] For structural compactness and ease of product manufacturing, the placement cavity 3 includes a first placement groove 31. The first charging unit 131 is a conductive probe, which is located at the bottom of the first placement groove 31. The main body 11 includes a first outer cover 111 and a first inner shell 112 connected to the first outer cover 111 to form the first placement groove 31, the first mounting cavity 17, and the second mounting cavity 16. The first inner shell 112 is located inside the first outer cover 111. The first mounting cavity 17 is located below the first placement groove 31. The first circuit board 13 and the light guide cover 14 are disposed in the first mounting cavity 17. The first battery 18 is disposed in the second mounting cavity 16, which is located behind the first placement groove 31. The pressing member 15, the first clearance hole 1111, and the second light guide hole 1112 are all located on the first outer cover 111.

[0058] In one embodiment, the cover 12 is rotatably connected to the main body 11. Of course, in other embodiments, the cover 12 and the main body 11 can also be connected by magnetic attraction, snap-fit, or other means.

[0059] In one embodiment, the placement cavity 3 includes a second placement groove 32, and the cover 12 includes a second outer cover 121 and a second inner shell 122 connected to the second outer cover 121 to form the second placement groove 32. The second inner shell 122 is at least partially located inside the second outer cover 121. A connecting panel 1211 extends downward from the bottom of the second outer cover 121, and pivot portions 1212 protrude from both sides of the connecting panel 1211. A limiting pivot hole 1122 is also formed between the first outer cover 111 and the first inner shell 112. The pivot portion 1212 is placed in the limiting pivot hole 1122 to achieve a rotatable connection between the cover 12 and the main body 11. Furthermore, the cover 12 can be stably connected to the main body 11 by magnetic attraction or snap-fit ​​on the side away from the pivot portion 1212 to prevent the cover 12 from opening automatically.

[0060] Based on the charging case 1 described above, this embodiment also provides a hand warmer component.

[0061] See attached document Figure 1-10 The hand warmer assembly includes at least one hand warmer unit 2 and a charging case 1 as described above. The hand warmer unit 2 is equipped with a second circuit board 23, a heating element 22, a second battery 21, and a second charging unit 24. The heating element 22, the second battery 21, and the second charging unit 24 are all electrically connected to the second circuit board 23. When the hand warmer unit 2 is placed in the placement cavity 3, the second charging unit 24 is close to or in contact with the first charging unit 131. The first charging unit 131 outputs electrical energy from the first circuit board 13 to the second charging unit 24, and the second charging unit 24 charges the second battery 21 with the electrical energy output from the first charging unit 131 via the second circuit board 23. The charging case 1 allows the user to charge the hand warmer unit 2 when away from home.

[0062] In one embodiment, the first charging unit 131 is a conductive probe disposed at the bottom of the placement cavity 3. The second charging unit 24 is a charging contact located at the bottom of the hand warmer unit 2. When the hand warmer unit 2 is placed in the placement cavity 3, the charging contact contacts the conductive probe, so that the electrical energy output by the first battery 18 can charge the second battery 21 after passing through the first circuit board 13, the conductive probe, the charging contact, and the second circuit board 23.

[0063] In one embodiment, the hand warmer unit 2 is recessed inward at the position corresponding to the charging contact to form a groove 25, and the placement cavity 3 is provided with an embedding block 1121 at the position corresponding to the groove 25. When the hand warmer unit 2 is placed in the placement cavity 3, the embedding block 1121 is placed in the groove 25 to improve the stability of the contact between the conductive probe and the charging contact.

[0064] In one embodiment, the housing 10 and the hand warmer unit 2 can also be fixed by interference fit, magnetic attraction, or snap-fit ​​connection, which can also improve the stability of the contact between the conductive probe and the charging contact.

[0065] In other embodiments, both the first charging unit 131 and the second charging unit 24 can be coils. That is, when the hand warmer unit 2 is placed in the placement cavity 3, the first charging unit 131 and the second charging unit 24 approach and interact, so that the electrical energy output by the first battery 18 charges the second battery 21 through the first circuit board 13, conductive probe, charging contact, and second circuit board 23, thereby realizing wireless charging of the hand warmer unit 2. Alternatively, the first charging unit 131 and the second charging unit 24 can be a male connector and a female connector that are adapted for use, which can also realize charging of the hand warmer unit 2 when it is placed in the placement cavity 3.

[0066] In one embodiment, the charging contacts can be located at the bottom of the hand warmer unit, meaning the hand warmer unit 2 is inserted vertically into the placement cavity 3, i.e., inserted along the height direction of the hand warmer unit 2. In other embodiments, the charging contacts can be located on the side wall of the hand warmer unit 2, meaning the hand warmer unit 2 can be inserted into the placement cavity 3 along the width direction of the hand warmer unit 2. In other embodiments, the charging contacts can also be located on the upper or lower surface of the hand warmer unit, allowing the hand warmer unit 2 to be placed flat in the placement cavity 3, i.e., the hand warmer unit 2 can be placed in the placement cavity 3 along the thickness direction of the hand warmer unit 2, etc. Manufacturers can customize the configuration according to their needs.

[0067] In one embodiment, the number of placement cavities 3 is one, that is, the charging compartment 1 is only suitable for charging one hand warmer unit 2.

[0068] In one embodiment, there are multiple placement cavities 3, and each placement cavity 3 is equipped with a first charging unit 131 for use, that is, the charging chamber 1 can charge multiple hand warmer units 2 at the same time.

[0069] See attached document Figure 11-12 In one embodiment, there are two hand warmer units 2, namely a first hand warmer 201 and a second hand warmer 202. Correspondingly, there are two placement cavities 3.

[0070] In one embodiment, the first hand warmer 201 and the second hand warmer 202 are detachably connected, so that the first hand warmer 201 unit 2 and the second hand warmer 202 unit 2 can be combined into a whole. This allows the first hand warmer 201 unit 2 to be detached from the second hand warmer 202 unit 2 when the user needs to warm both hands / multiple body parts simultaneously, so that the first hand warmer 201 unit 2 and the second hand warmer 202 unit 2 can each be used to warm both hands / multiple different body parts. When the user only needs to warm one hand / one body part, the first hand warmer 201 unit 2 and the second hand warmer 202 unit 2 can be combined into a whole to increase the heating area of ​​the hand warmer for that hand / one body part and improve the heating effect. Furthermore, when users need to carry or store the hand warmers, they can choose to carry or store the first hand warmer 201 and the second hand warmer 202 separately, or combine the first hand warmer 201 and the second hand warmer 202 into a whole for carrying or storing, depending on the actual situation, so as to meet the user's needs in multiple scenarios and greatly improve the user experience.

[0071] Specifically, the first hand warmer 201 includes a first outer surface 2014 and a first connecting surface 2011 opposite to the first outer surface 2014, and a first connecting portion is provided on the first connecting surface 2011. The second hand warmer 202 includes a second outer surface and a second connecting surface 2021 opposite to the second outer surface, and a second connecting portion is provided on the second connecting surface 2021. The first connecting portion and the second connecting portion are connected by a method of mutual magnetic attraction, such as a snap fastener, Velcro, or multiple magnetic components, so that the first connecting inner surface is connected to the second connecting inner surface, thus combining the first hand warmer 201 unit 2 and the second hand warmer 202 unit 2 into a whole.

[0072] In one embodiment, the first connecting portion includes a first slot 2013 and a first buckle 2012, which are located at both ends of the hand warmer unit 2, respectively. The second connecting portion includes a second slot 2022 and a second buckle 2023. The first buckle 2012 engages with the second slot 2022 when the first hand warmer 201 and the second hand warmer 202 are assembled together, and the second buckle 2023 engages with the first slot 2013 when the first hand warmer 201 and the second hand warmer 202 are assembled together. In this way, the first hand warmer 201 and the second hand warmer 202 can be stably assembled together using the buckle structure at both ends. Of course, in other embodiments, the first connecting portion may include two slots, and the second connecting portion may include two buckles adapted to the slots; or both the first connecting portion and the second connecting portion may be Velcro or magnets, etc., which can also achieve a detachable connection between the first hand warmer 201 and the second hand warmer 202.

[0073] In one embodiment, the hand warmer unit 2 is further provided with a second charging interface 25 for connecting an external power cord. The second charging interface 25 is used to connect an external power source, and after connecting to a power source, the second battery 21 can be charged via the second circuit board 23. This allows both the charging case 1 and the hand warmer unit 2 to charge themselves via the power cord when the charging case 1 is low on power, improving the charging speed. Furthermore, when the hand warmer unit 2 is charged using the second charging interface 25, the power of the charging case 1 is not consumed, ensuring sufficient power for use when out and about. Specifically, both the first charging interface 136 and the second charging interface 25 can be Type-C, Micro USB, Lightning, DC, etc.

[0074] In one embodiment, the capacity of the first battery 18 is at least twice the capacity of the first battery 18, so that the charging case 1 can fully charge both hand warmer units 2 at least once simultaneously. Of course, in other embodiments, the capacity of the first battery 18 can also be at least three times, four times, etc., so that the charging case 1 can charge both hand warmer units 2 at least twice simultaneously, making it convenient for users to use when out and about.

[0075] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0076] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0077] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A portable hand warmer charging case, characterized in that, Includes a housing, on which a placement cavity is provided for placing and charging the hand warmer unit; The chamber is provided with a first circuit board, a first charging unit and a first battery, and the first battery and the first charging unit are both electrically connected to the first circuit board. When the hand warmer unit is placed in the placement cavity, the first circuit board is used to output the electrical energy output by the first battery from the first charging unit; the first charging unit is used to be adapted to the second charging unit on the hand warmer unit and to transmit the electrical energy output by the first circuit board to the second charging unit on the hand warmer unit.

2. The portable hand warmer charging case according to claim 1, characterized in that, The first charging unit is a conductive probe, which is disposed at the bottom of the placement cavity.

3. The portable hand warmer charging case according to claim 2, characterized in that, The first circuit board is provided with an indicator light unit for indicating the power status of the first battery and / or the charging status of the hand warmer unit.

4. The portable hand warmer charging case according to claim 3, characterized in that, The indicator unit includes multiple light-emitting elements disposed on the first circuit board, and the multiple light-emitting elements are arranged side by side. The chamber is also provided with a light guide cover, and the light guide cover has a receiving groove at the position corresponding to each light-emitting element. The light-emitting element is located in the receiving groove. The light guide cover has a first light guide hole that communicates with the receiving groove. The chamber has a second light guide hole at the position corresponding to the first light guide hole.

5. The portable hand warmer charging case according to claim 3, characterized in that, The indicator unit includes a power indicator and a charging status indicator, with the charging status indicator located next to the power indicator.

6. The portable hand warmer charging case according to claim 4, characterized in that, The first circuit board is provided with function buttons, and the chamber is provided with a pressing component connected to the function buttons. When the function buttons are operated, the first circuit board outputs electrical energy to the first charging unit. The first circuit board is provided with a first charging interface, and the compartment is provided with a first clearance hole for avoiding the first charging interface; The indicator light unit, function button, and first charging interface are arranged side by side along the thickness direction of the charging compartment, with the function button located between the indicator light unit and the first charging interface.

7. The portable hand warmer charging case according to claim 6, characterized in that, The compartment includes a main body and a cover connected to the main body to form a placement cavity; The placement cavity includes a first placement groove, and the conductive probe is disposed at the bottom of the first placement groove. The main body includes a first outer cover and a first inner shell connected to the first outer cover to form the first placement groove, the first mounting cavity, and the second mounting cavity. The first inner shell is located inside the first outer cover, and the first mounting cavity is located below the first placement groove. The first circuit board is disposed in the first mounting cavity. The first battery is disposed in the second mounting cavity, which is located behind the first placement groove. The pressing member, the first clearance hole, and the second light guide hole are all located on the first outer cover. The cover is rotatably connected to the main body; The placement cavity includes a second placement groove, and the cover includes a second outer cover and a second inner shell connected to the second outer cover to form the second placement groove, wherein the second inner shell is at least partially located inside the second outer cover. The bottom of the second outer cover extends downward to form a connecting panel, and the two sides of the connecting panel protrude to form a pivot portion; The connection between the first outer cover and the first inner shell also forms a limiting rotating hole, and the rotating shaft is placed in the limiting rotating hole.

8. A hand warmer component, characterized in that, Includes at least one hand warmer unit and a charging case as described in claim 1; The hand warmer unit is equipped with a second circuit board, a heating element, a second battery, and a second charging unit. The heating element, the second battery, and the second charging unit are all electrically connected to the second circuit board. When the hand warmer unit is placed in the placement cavity, the second charging unit is close to or in contact with the first charging unit. The first charging unit is used to output the electrical energy output from the first circuit board to the second charging unit. The second charging unit charges the second battery with the electrical energy output from the first charging unit after passing through the second circuit board.

9. The hand warmer component according to claim 8, characterized in that, The first charging unit is a conductive probe, which is disposed at the bottom of the placement cavity; the second charging unit is a charging contact, which is located at the bottom of the hand warmer unit, and the charging contact contacts the conductive probe when the hand warmer unit is placed in the placement cavity. The hand warmer unit has an inward recess at the position of the corresponding charging contact to form a groove, and the placement cavity has an embedding block at the position of the corresponding groove. The embedding block is placed in the groove when the hand warmer unit is placed in the placement cavity.

10. The hand warmer component according to claim 9, characterized in that, The number of hand warmer units is two, namely a first hand warmer and a second hand warmer; the number of placement chambers is two; The first hand warmer and the second hand warmer are detachably connected; The hand warmer unit is also equipped with a second charging interface for connecting an external power cord.

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