A hand warmer

Abstract

The utility model belongs to the technical field of hand warmer, especially relates to a hand warmer, a kind of hand warmer, comprising: shell, it is equipped with at least one heat-conducting surface for user to grip;Heating sheet, it is located in shell and is attached to the heat-conducting surface to heat heat-conducting surface;Battery, it is located in the inside of shell and is electrically connected with heating sheet;Charging cable is connected with the battery, it includes cable and the connector located at one end of cable, the surface of the shell is equipped with the through-hole for the charging cable to extend and the placement slot reel communication with through-hole, it is located in shell and is connected with the other end of cable, the reel is used to realize the contraction of cable;Wherein, in natural state, the length of the charging cable exposed outside through-hole and the length of placement slot are adapted, so that the exposed part of charging cable hides in placement slot.The utility model has the advantages of being convenient for user to charge by setting charging cable, and simultaneously not affecting user gripping experience.

Description

Technical Field

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

[0002] There are usually two charging solutions for existing hand warmers. One solution is that the hand warmer uses standard interfaces such as USB, Type-A, and Type-C. This method requires the user to bring their own charging cable for power supply. Users need to carry the data cable separately, and in outdoor scenarios, the cable may be lost or forgotten.

[0003] Another option is to have a fixed-length charging cable for the hand warmer. In this case, the length of the charging cable is not adjustable, and the cable is exposed and prone to tangling. Furthermore, the exposed cable swings when the user holds the hand warmer and walks, affecting the user's grip experience. Utility Model Content

[0004] To address the shortcomings of existing technologies, a hand warmer with a charging cable is provided that does not affect the user's grip experience.

[0005] This utility model is achieved using the following technical solution: a hand warmer, comprising:

[0006] The housing has at least one side with a heat-conducting surface for the user to grip;

[0007] A heating element is disposed inside the housing and is attached to the heat-conducting surface to heat the heat-conducting surface;

[0008] A battery is located inside the housing and is electrically connected to the heating element;

[0009] A charging cable, connected to the battery, includes a cable and a connector at one end of the cable. The surface of the housing has a through hole for the charging cable to extend from and a slot communicating with the through hole.

[0010] A cable reel, which is located inside the housing and connected to the other end of the cable, is used to retract the cable;

[0011] In its natural state, the length of the charging cable protruding from the outside of the through hole is adapted to the length of the placement groove, so that the exposed part of the charging cable is hidden inside the placement groove.

[0012] When the hand warmer is in use, the charging cable is mostly coiled inside the casing, with the portion protruding on the outside hidden in a recessed slot. Therefore, when the user grips the hand warmer, the cable and connector won't protrude and swing around, ensuring a comfortable grip. The recessed slot also positions the charging cable, and the exposed cable length prevents tangling. When the hand warmer needs charging, the charging cable can be pulled out and the connector connected to a plug or power bank to charge the battery.

[0013] Among them, the cable reel is any existing type that uses a spiral spring to achieve the natural retraction of the charging cable.

[0014] This solution allows the charging cable to be directly connected to a plug or power bank, eliminating the need for users to carry an extra data cable and making it more convenient to carry. Furthermore, the charging cable is equipped with a cable reel and a storage slot, preventing the cable from swinging or tangling on the outside and improving the user's grip experience.

[0015] Preferably, the through holes and placement slots are located in areas of the housing that do not have heat-conducting surfaces.

[0016] Placing the through holes and placement slots in areas without a heat-conducting surface ensures the integrity of the heat-conducting surface, thereby improving the user's hand-warming experience.

[0017] Preferably, the housing includes:

[0018] A ring-shaped frame with openings at both axial ends;

[0019] A pair of contact plates are symmetrically connected to the two open ends of the annular frame, and the outer surface of at least one of the contact plates serves as the heat-conducting surface, which is matched with the anatomical curve of the user's palm.

[0020] The ring frame is equipped with a control button, and the housing contains a circuit board that is electrically connected to the control button.

[0021] The outer surface of the contact plate serves as a heat-conducting surface. The control button is positioned on the annular frame in the middle, thus avoiding the contact plates on both sides of the axis and the heat-conducting surface.

[0022] Preferably, the outer surface of one of the contact plates serves as the heat-conducting surface, the axial direction of the winding reel is perpendicular to the axial direction of the annular frame, and the through hole and placement groove are disposed on another contact plate; or

[0023] The outer surfaces of both contact plates serve as the heat-conducting surfaces. The axial direction of the winding reel is parallel to the axial direction of the annular frame. The through holes and placement slots are provided on the annular frame.

[0024] Preferably, the wall of the contact plate or the wall of the annular frame is recessed inward to form the placement groove.

[0025] The walls of the contact plate or the ring frame are recessed inward to form a placement groove, which eliminates the need for excessively thick walls and saves material.

[0026] Preferably, the outer wall of the connector is stepped, and the inner wall of the placement groove has a stepped structure that matches the outer wall of the connector.

[0027] The above setup allows the exposed charging cable to be stably hidden in the placement slot.

[0028] Preferably, the housing has a circuit board and a winding device at both ends along its length, and the battery is disposed between the circuit board and the winding device.

[0029] Preferably, the circuit board and the battery are respectively provided at both ends of the housing along its length, and the cable reel is located between the circuit board and the battery.

[0030] Preferably, the battery is located on both sides of the axial direction of the reel.

[0031] Compared with the prior art, the advantages of this utility model are: by setting the charging cable to be directly connected to the plug or power bank, the user does not need to carry an extra data cable, making it more convenient for the user to carry; and the charging cable is equipped with a cable reel and a storage slot, so that the charging cable will not swing or get tangled on the outside, which can improve the user's grip experience. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of Example 1;

[0033] Figure 2 for Figure 1 A schematic diagram of the structure after removing one of the contact plates;

[0034] Figure 3 for Figure 1 A schematic diagram of the structure after being rotated 180°;

[0035] Figure 4 for Figure 1 A sectional view;

[0036] Figure 5 for Figure 2 A schematic diagram of the structure after removing the heating element;

[0037] Figure 6 This is a structural diagram of the cable reel, battery, circuit board, and button.

[0038] Figure 7 This is a schematic diagram of the internal structure of the shell in Example 2;

[0039] Figure 8 for Figure 7 A structural diagram of the cable reel, battery, circuit board, and button;

[0040] Figure 9 This is a schematic diagram of the internal structure of the shell in Example 3;

[0041] Figure 10 This is a schematic diagram of the shell structure in Example 4;

[0042] Figure 11 for Figure 10 A schematic diagram of the structure after removing the charging cable;

[0043] Figure 12 for Figure 10 A structural diagram of the cable reel, battery, circuit board, and button;

[0044] Reference numerals: 1. Contact plate; 11. Heating element; 2. Circular frame; 3. Connector; 4. Cable; 5. Placement slot; 6. Button; 7. Battery; 8. Cable reel; 9. Circuit board. Detailed Implementation

[0045] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0046] like Figures 1 to 6 As shown in Embodiment 1, a hand warmer is disclosed. Its housing includes an annular frame 2, with openings at both axial ends. Two symmetrical contact plates 1 are respectively connected to the openings at both ends of the annular frame 2. The contact plates 1 are arc-shaped, and the outer surfaces of both contact plates 1 serve as heat-conducting surfaces to match the anatomical curve of the user's palm. A heating element 11 is provided inside the housing, in close contact with the inner wall of the contact plate 1. The heating element 11 has an arc adapted to the contact plate 1.

[0047] The housing also houses a battery 7, a charging cable, a circuit board 9, and a cable reel 8. The circuit board 9 and the cable reel 8 are located at opposite ends of the housing along its length. The battery 7 is positioned between the cable reel 8 and the circuit board 9, and is electrically connected to a heating element 11. The circuit board 9 controls both the battery 7 and the heating element 11. Two buttons 6 are embedded in the annular frame 2, and are electrically connected to the circuit board 9. The charging cable is wound around the cable reel 8 and connected to the battery 7, used to charge the battery 7 after connection to a power source. The cable reel 8 has a spiral spring (not shown) that allows the charging cable to retract and wind in its natural state. The charging cable includes a connector 3 and a cable 4. The annular frame 2 has a through hole for the charging cable to extend and a placement groove 5 adapted to the connector 3. The wall of the annular frame 2 is recessed inward to form the placement groove 5.

[0048] The outer wall of connector 3 is stepped, and the inner wall of placement groove 5 has a stepped structure that matches the outer wall of connector 3. In its natural state, the length of the charging cable protruding outside the through hole matches the length of placement groove 5, so that the exposed part of the charging cable is hidden inside placement groove 5.

[0049] The cable reel 8 is arranged parallel to the axis of the ring frame 2, so the charging cable can extend or retract from the ring frame 2 more effectively.

[0050] Connector 3 can use standard interfaces such as USB, Type-A, and Type-C.

[0051] Example 2

[0052] like Figure 7 and Figure 8 As shown, the difference between this embodiment 2 and embodiment 1 is that the number of batteries 7 is two and they are respectively located at both ends of the axial direction of the winding device 8.

[0053] Example 3

[0054] like Figure 9 As shown, the difference between this embodiment 3 and embodiment 1 is that: the casing has a circuit board 9 and a battery 7 at both ends along its length, and the cable reel 8 is located between the battery 7 and the circuit board 9.

[0055] Example 4

[0056] like Figures 10 to 12 As shown, the difference between this embodiment 4 and embodiment 1 is that the inner wall of the lower contact plate 1 is not provided with a heating element 11, while only the inner wall of the upper contact plate 1 is provided with a heating element 11. The axial direction of the reel 8 is perpendicular to the axial direction of the annular frame 2, and the wall of the lower contact plate 1 is provided with a placement groove 5 and a through hole, so that the charging cable can be embedded and hidden in the contact plate 1.

[0057] When the hand warmer is in use, the charging cable is mostly coiled inside the casing, with the portion protruding on the outside hidden in the slot 5. Therefore, when the user grips the hand warmer, the cable 4 and connector 3 will not protrude from the casing and swing, thus not affecting the user's grip experience. Furthermore, the slot 5 positions the charging cable, and the exposed length of the cable is not too long, preventing tangling. When the hand warmer needs charging, the charging cable can be pulled out, and the connector 3 can be connected to a plug or power bank to charge the hand warmer's battery 7.

Claims

1. A hand warmer, characterized in that, include: The housing has at least one heat-conducting surface for the user to grip; A heating element is disposed inside the housing and is attached to the heat-conducting surface to heat the heat-conducting surface; A battery is located inside the housing and is electrically connected to the heating element; A charging cable, connected to the battery, includes a cable and a connector at one end of the cable. The surface of the housing has a through hole for the charging cable to extend from and a slot communicating with the through hole. A cable reel, which is located inside the housing and connected to the other end of the cable, is used to retract the cable; In its natural state, the length of the charging cable protruding from the outside of the through hole is adapted to the length of the placement groove, so that the exposed part of the charging cable is hidden inside the placement groove.

2. The hand warmer according to claim 1, characterized in that: The through holes and placement slots are located in areas of the housing that do not have heat-conducting surfaces.

3. The hand warmer according to claim 2, characterized in that, The housing includes: A ring-shaped frame with openings at both axial ends; A pair of contact plates are symmetrically connected to the two open ends of the annular frame, and the outer surface of at least one of the contact plates serves as the heat-conducting surface, which is matched with the anatomical curve of the user's palm. The ring frame is equipped with a control button, and the housing contains a circuit board that is electrically connected to the control button.

4. The hand warmer according to claim 3, characterized in that: The outer surface of one of the contact plates serves as the heat-conducting surface; the axial direction of the winding reel is perpendicular to the axial direction of the annular frame; the through hole and placement groove are disposed on another contact plate; or The outer surfaces of both contact plates serve as the heat-conducting surfaces. The axial direction of the winding reel is parallel to the axial direction of the annular frame. The through holes and placement slots are provided on the annular frame.

5. The hand warmer according to claim 4, characterized in that: The wall of the contact plate or the wall of the annular frame is recessed inward to form the placement groove.

6. The hand warmer according to any one of claims 1 to 5, characterized in that: The outer wall of the connector is stepped, and the inner wall of the placement groove has a stepped structure that matches the outer wall of the connector.

7. The hand warmer according to claim 3, characterized in that: The housing has a circuit board and a winding device at both ends along its length, and the battery is located between the circuit board and the winding device.

8. The hand warmer according to claim 3, characterized in that: The housing has the circuit board and the battery at its two ends along its length, and the cable reel is located between the circuit board and the battery.

9. The hand warmer according to claim 3, characterized in that: The batteries are located on both sides of the axial direction of the winding reel.

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