Hand warmer

Abstract

The utility model provides a hand warmer which comprises a shell made of a plastic material and provided with a first positioning groove; the heat conductor is matched with the first positioning groove, and the heat conductor and the shell are connected into a whole in an injection molding mode. According to the hand warmer, due to the fact that the shell is provided with the first positioning groove, the heat conductor is matched with the first positioning groove, the heat conductor can be installed and positioned, rapid installation of the heat conductor is facilitated, meanwhile, the contact area between the shell and the heat conductor can be increased, and the connection stability of the heat conductor and the shell can be improved; in addition, the assembling procedure of the heat conductor and the shell is omitted, the installation steps of the hand warmer are greatly simplified, installation is simpler and more convenient, and the installation efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of small household appliance technology, and in particular to a hand warmer. Background Technology

[0002] A hand warmer is a small household appliance used to keep warm in winter, primarily by providing heat. Hand warmers come in various types and application scenarios, suitable for different needs and occasions.

[0003] Currently, commonly used lithium battery hand warmers on the market mainly consist of a shell, battery, control circuit board, heating element, temperature sensor, and heat conductor. The battery, control circuit board, heating element, and temperature sensor are all located inside the shell; the battery provides electrical energy; the control circuit board controls and manages the use of electrical energy; the heating element converts electrical energy into heat energy to provide warmth; the temperature sensor probe is in contact with the heating element; the shell protects the internal structure and provides a comfortable grip; the heat conductor is located on the shell and is connected to the heating element to transfer heat from the heating element to the heat conductor, thus transferring heat to the user when they hold the hand warmer.

[0004] Although the aforementioned lithium battery hand warmer can start heating up in a short time to meet the need for rapid heating, the installation process is cumbersome and inefficient because the heat conductor is connected to the shell through a buckle. During installation, a jig is needed to fix the shell, then the buckle of the heat conductor is passed through the buckle hole of the shell, and finally the buckle is bent and pressed onto the shell. Utility Model Content

[0005] This application provides a hand warmer to solve the problems existing in related technologies. The technical solution is as follows:

[0006] This application provides a hand warmer, including:

[0007] A housing, the housing being made of plastic, the outer side wall of the housing having a first positioning groove; and

[0008] A heat conductor is provided, which is adapted to the first positioning groove, and the heat conductor is connected to the housing by in-mold injection molding to form an integral unit.

[0009] In one embodiment, the heat conductor and the heating element are bonded together.

[0010] In one embodiment, the heat conductor is made of aluminum.

[0011] In one embodiment, the housing further has an inner cavity and a connecting port, the inner cavity, the connecting port and the first positioning groove are arranged sequentially along a first direction of the housing, the connecting port connects the inner cavity and the first positioning groove, and the first positioning groove is arranged around the connecting port;

[0012] The hand warmer also includes:

[0013] A heating element is disposed within the communicating port and connected to the heat conductor;

[0014] A control circuit board is disposed within the inner cavity and is electrically connected to the heating element.

[0015] In one embodiment, the hand warmer further includes:

[0016] A battery is disposed within the inner cavity and supplies power to the control circuit board.

[0017] In one embodiment, the control circuit board is provided with a spring pin;

[0018] The heating element is provided with a contact point, which abuts against the spring pin to electrically connect the heating element and the control circuit board.

[0019] In one embodiment, a temperature sensor is also provided inside the cavity. The temperature sensor is electrically connected to the control circuit board. The temperature sensor is used to detect the operating temperature of the heating element. The control circuit board is used to control the heating element to turn off or switch to a heat preservation mode based on the feedback information from the temperature sensor.

[0020] In one embodiment, the housing is further provided with a display, which is electrically connected to the control circuit board and is used to display the working status of the hand warmer.

[0021] In one embodiment, the housing includes:

[0022] A shell body, the shell body having the inner cavity, the communicating opening, the first positioning groove, and the clearance opening, the clearance opening communicating with the inner cavity, the clearance opening for the display to pass through, the shell body being made of a non-transparent material; and

[0023] A transparent element is disposed on the shell body and covers the clearance opening to enclose the display inside the shell body. The transparent element is made of transparent or light-transmitting material.

[0024] In one embodiment, the shell body further has a second positioning groove, which is disposed around the clearance opening and communicates with the clearance opening. The transparent body is adapted to the second positioning groove.

[0025] In one embodiment, one of the shell body and the transparent body has a snap-fit ​​groove, and the other has a snap-fit ​​protrusion. The snap-fit ​​protrusion is inserted into the snap-fit ​​groove to connect the shell body and the transparent body together.

[0026] In one embodiment, the shell body includes:

[0027] The lower housing has the clearance opening and the second positioning groove; and

[0028] The upper shell has the first positioning groove, and the upper shell and the lower shell are connected to form the inner cavity.

[0029] The advantages or beneficial effects of the above technical solutions include at least the following:

[0030] The hand warmer of this utility model has a first positioning groove in the shell. The heat conductor is adapted to the first positioning groove, which can play a role in the installation and positioning of the heat conductor, making it easy to install the heat conductor quickly. At the same time, it can also increase the contact area between the shell and the heat conductor, and improve the connection stability between the heat conductor and the shell.

[0031] More importantly, since the shell is made of plastic and the heat conductor and the shell are connected as one piece by in-mold injection molding, the plastic can be used to fill the gap between the shell and the heat conductor during the injection molding process. That is, the plastic can be used to fill the gap between the first positioning groove and the heat conductor. When the plastic cools, it shrinks and firmly adheres to the heat conductor, so that the shell and the heat conductor form a solid structure, the connection is more secure and reliable, and it can effectively prevent the heat conductor from falling off. At the same time, it also eliminates the assembly process of the heat conductor and the shell, greatly simplifying the installation steps of the hand warmer, making the installation simpler, more convenient and more efficient.

[0032] In addition, since the shell is made of plastic and the heat conductor and the shell are connected by injection molding to form a whole, it is easier to standardize the production of the shell and the heat conductor. After the two are connected, the gap between the shell and the heat conductor is significantly reduced, making the overall shape of the hand warmer more consistent, flatter, and simpler and more beautiful.

[0033] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0034] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0035] Figure 1 This is a three-dimensional structural diagram of the hand warmer of this utility model from a first-person perspective.

[0036] Figure 2 This is a three-dimensional structural diagram of the hand warmer of this utility model from a second perspective.

[0037] Figure 3 This is a three-dimensional structural diagram of the hand warmer of this utility model from a second perspective, wherein the perspective body is in an open state;

[0038] Figure 4 This is an exploded view of the hand warmer of this utility model;

[0039] Figure 5 This is a cross-sectional view of the hand warmer of this utility model.

[0040] Figure Labels

[0041] 1. Housing; 11. Inner cavity; 12. Connecting port; 13. First positioning groove; 14. Housing body; 141. Lower shell; 1411. Second positioning groove; 1412. Snap-fit ​​groove; 1413. First snap-fit ​​part; 1414. Clearance opening; 142. Upper shell; 1421. Second snap-fit ​​part; 15. Transparent body; 151. Snap-fit ​​protrusion; 2. Heating element; 21. Contact point; 3. Battery; 4. Control circuit board; 5. Heat conductor; 6. Spring pin; 7. Temperature sensor; 8. Display. Detailed Implementation

[0042] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0043] See Figures 1-5 This invention illustrates a preferred embodiment of a hand warmer, comprising:

[0044] The housing 1 is made of plastic material. The housing 1 has an inner cavity 11, a connecting port 12 and a first positioning groove 13. The inner cavity 11, the connecting port 12 and the first positioning groove 13 are arranged sequentially along the first direction of the housing 1. The connecting port 12 connects the inner cavity 11 and the first positioning groove 13. The first positioning groove 13 is arranged around the connecting port 12.

[0045] Heating element 2 is located inside the connecting port 12;

[0046] Battery 3 is located inside the inner cavity 11;

[0047] A control circuit board 4 is disposed within the inner cavity 11. The control circuit board 4 is electrically connected to the heating element 2 and the battery 3, thereby controlling the opening and closing of the heating element 2.

[0048] The heat conductor 5 is adapted to the first positioning groove 13, the heat conductor 5 is connected to the heating element 2, and the heat conductor 5 is connected to the shell 1 by in-mold injection molding to form an integral unit.

[0049] This utility model of a hand warmer, because the shell 1 has a first positioning groove 13, and the heat conductor 5 is adapted to the first positioning groove 13, can play a role in positioning the heat conductor 5 for installation, which facilitates the quick installation of the heat conductor 5. At the same time, it can also increase the contact area between the shell 1 and the heat conductor 5, which can improve the connection stability between the heat conductor 5 and the shell 1. More importantly, because the shell 1 is made of plastic material and the heat conductor 5 and the shell 1 are connected as one piece by in-mold injection molding, the plastic can be used to fill the gap between the shell 1 and the heat conductor 5 during the injection molding process, that is, to fill the gap between the first positioning groove 13 and the heat conductor 5. When the plastic cools, the plastic shrinks and firmly adheres to the heat conductor 5, so that the shell 1 and the heat conductor 5 form a solid structure, the connection is more firm and reliable, and it can effectively prevent the heat conductor 5 from falling off. At the same time, it also eliminates the assembly process of the heat conductor 5 and the shell 1, which greatly simplifies the installation steps of the hand warmer, making the installation simpler, more convenient and more efficient.

[0050] It can be understood that the first direction of shell 1 is interpreted as Figure 1 The vertical direction shown is the height direction of the shell 1.

[0051] In one embodiment, the bottom wall of the heat conductor 5 and the top wall of the heating element 2 are bonded together, that is, an adhesive layer is provided between the bottom wall of the heat conductor 5 and the top wall of the heating element 2, so that the bottom wall of the heat conductor 5 and the top wall of the heating element 2 are reliably connected together, thereby improving the heat transfer efficiency of the heating element 2 and the heat conductor 5, and the heat conduction efficiency is higher.

[0052] In one embodiment, the heat conductor 5 is made of aluminum, which has excellent thermal conductivity and can improve the thermal conductivity efficiency of the heat conductor 5.

[0053] In other embodiments, the heat conductor 5 can also be a structure made of materials such as copper or aluminum alloy, as long as it can conduct heat.

[0054] In one embodiment, a spring pin 6 is provided on the control circuit board 4;

[0055] The heating element 2 is provided with a contact 21, which abuts against the spring pin 6 to electrically connect the heating element 2 and the control circuit board 4. Thus, during installation, the heating element 2 and the control circuit board 4 can be electrically connected simply by abutting the contact 21 against the spring pin 6, making the installation operation more convenient and simple, and further improving installation efficiency.

[0056] In other embodiments, one of the control circuit board 4 and the heating element 2 is provided with a male connector and the other with a female connector. The female connector and the male connector are plugged in and matched, which can also realize the electrical connection between the heating element 2 and the control circuit board 4. The installation operation is more convenient and simple, and the installation efficiency can be further improved.

[0057] In one embodiment, the heating element 2 includes a heating sheet that is attached to the heat conductor 5. Since the heating sheet has a flat structure, the contact area between it and the heat conductor 5 can be increased, thereby improving the heat conduction efficiency and thus the heating efficiency. At the same time, the heating sheet has a thin wall thickness and occupies less space, which is more conducive to the compact and miniaturized design of the hand warmer.

[0058] In one embodiment, the heating element is a PI heating element, also known as a polyimide heating element. This heating element is flexible, thin, has high insulation strength, is non-toxic, and has good heat resistance, making the overall structure of the heating element 2 more compact and greatly reducing the space occupied, thus making it more conducive to the compact or miniaturized design of the hand warmer.

[0059] In other embodiments, the heating element may also be any one of the following: USB heating element, silicone heating element (silicone rubber heating element), mica heating element, MCH heating element, ceramic heating element, silicon conductive heating element, soft carbon crystal floor heating element, PET electric heating film polyester heating element, aluminum foil heating element, etc.

[0060] In one embodiment, a temperature sensor 7 is also provided inside the inner cavity 11. The temperature sensor 7 is electrically connected to the control circuit board 4. The temperature sensor 7 is used to detect the operating temperature of the heating element 2. The control circuit board 4 is used to control the heating element 2 to shut down or switch to a heat preservation mode based on the feedback information from the temperature sensor 7. Thus, when the temperature sensor 7 detects that the operating temperature of the heating element 2 has reached the set temperature, the control circuit board 4 receives the feedback information from the temperature sensor 7 and controls the heating element 2 to shut down in time to prevent the heating element 2 from overheating. Alternatively, the control circuit board 4 receives the feedback information from the temperature sensor 7 and switches to a heat preservation mode to maintain the current operating temperature of the heating element 2.

[0061] In one embodiment, the housing 1 is further provided with a display 8, which is electrically connected to the control circuit board 4. The display 8 is used to display the working status of the hand warmer, so as to make the working status of the hand warmer visible and improve the convenience of the hand warmer. The working status can be the current temperature of the heating element 2 or the current battery level of the hand warmer.

[0062] In one embodiment, the housing 1 includes:

[0063] The shell body 14 has an inner cavity 11, a connecting opening 12, a first positioning groove 13, and a clearance opening 1414. The clearance opening 1414 connects to the inner cavity 11 and allows the display 8 to pass through. The shell body 14 is made of a non-transparent material.

[0064] The transparent body 15 is located on the shell body 14 and covers the clearance opening 1414 to enclose the display 8 inside the shell body 14, thus protecting the display 8. The transparent body 15 is made of transparent or light-transmitting material, so that the user can visually observe the content displayed on the display 8 through the transparent body 15.

[0065] In one embodiment, the transparent body 15 and the heat conductor 5 are respectively placed on both sides of the shell body 14 in the height direction to improve the space utilization rate of the shell body 14 in the height direction.

[0066] In one embodiment, the shell body 14 also has a second positioning groove 1411, which is arranged around the clearance opening 1414 and is connected to the clearance opening 1414. The transparent body 15 is adapted to the second positioning groove 1411. In this way, the second positioning groove 1411 can be used to install and position the transparent body 15, which facilitates the installation of the transparent body 15 and also strengthens the connection stability between the shell body 14 and the transparent body 15.

[0067] In one embodiment, one of the housing body 14 and the transparent body 15 has a snap-fit ​​groove 1412, and the other has a snap-fit ​​protrusion 151. The snap-fit ​​protrusion 151 is inserted into the snap-fit ​​groove 1412 to connect the housing body 14 and the transparent body 15 together. In this way, by connecting the snap-fit ​​protrusion 151 and the snap-fit ​​groove 1412, the housing body 14 and the transparent body 15 can be connected together, enabling tool-free installation of the transparent body 15. The installation operation is simple and convenient, which can greatly improve the installation efficiency.

[0068] Of course, in other embodiments, the transparent bodies 15 can also be connected together by fasteners such as screws, bolts, and rivets, or by adhesive bonding.

[0069] To facilitate the installation of the heating element 2, battery 3, control circuit board 4, etc., in one embodiment, the housing body 14 includes:

[0070] Lower shell 141, lower shell 141 having a clearance opening 1414 and a second positioning groove 1411; and

[0071] The upper shell 142 has a first positioning groove 13 and a connecting opening 12. The upper shell 142 is connected to the lower shell 141, and the upper shell 142 and the lower shell 141 form an inner cavity 11.

[0072] In one embodiment, the lower shell 141 is provided with a first latching part 1413, and the upper shell 142 is provided with a second latching part 1421. The second latching part 1421 and the first latching part 1413 are connected to connect the upper shell 142 and the lower shell 141 together. Thus, by connecting the second latching part 1421 and the first latching part 1413, the upper shell 142 and the lower shell 141 can be connected together, making the installation operation simple and convenient, and greatly improving installation efficiency.

[0073] In one embodiment, of the first latching part 1413 and the second latching part 1421, one is a latching groove and the other is a latching protrusion, and the latching protrusion and the latching groove are adapted to each other.

[0074] In one embodiment, the lower shell 141 and the upper shell 142 are also connected together by screws to further increase the connection stability of the lower shell 141 and the upper shell 142.

[0075] In one embodiment, the lower shell 141 and the upper shell 142 may be connected together by fasteners such as screws, bolts, and rivets.

[0076] In one embodiment, the battery 3 and the control circuit board 4 are arranged sequentially along the length of the housing 1 to improve the space utilization rate of the housing 1 in the length direction.

[0077] In one embodiment, the battery 3 is a rechargeable battery 3 to facilitate the recycling of the battery 3. Of course, in other embodiments, the battery 3 may also be a non-rechargeable battery 3.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0080] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hand warmer, characterized in that, include: The housing is made of plastic and has a first positioning groove on its outer side wall; as well as A heat conductor is provided, which is adapted to the first positioning groove, and the heat conductor is connected to the housing by in-mold injection molding to form an integral unit.

2. A hand warmer according to claim 1, characterized in that, The housing also has an inner cavity and a connecting port. The inner cavity, the connecting port and the first positioning groove are arranged sequentially along a first direction of the housing. The connecting port connects the inner cavity and the first positioning groove. The first positioning groove is arranged around the connecting port. The hand warmer also includes: A heating element is disposed within the communicating port and connected to the heat conductor; A control circuit board is disposed within the inner cavity and is electrically connected to the heating element.

3. A hand warmer according to claim 2, characterized in that, The hand warmer also includes: A battery is disposed within the inner cavity and supplies power to the control circuit board.

4. A hand warmer according to claim 2, characterized in that, The control circuit board is equipped with a spring pin; The heating element is provided with a contact point, which abuts against the spring pin to electrically connect the heating element and the control circuit board.

5. A hand warmer according to claim 2, characterized in that, A temperature sensor is also provided inside the cavity. The temperature sensor is electrically connected to the control circuit board. The temperature sensor is used to detect the operating temperature of the heating element. The control circuit board is used to control the heating element to turn off or switch to heat preservation mode based on the feedback information from the temperature sensor.

6. A hand warmer according to claim 2, characterized in that, The housing is also equipped with a display, which is electrically connected to the control circuit board and is used to display the working status of the hand warmer.

7. A hand warmer according to claim 6, characterized in that, The housing includes: A shell body, the shell body having the inner cavity, the communicating opening, the first positioning groove, and the clearance opening, the clearance opening communicating with the inner cavity, the clearance opening for the display to pass through, the shell body being made of a non-transparent material; and A transparent element is disposed on the shell body and covers the clearance opening to enclose the display inside the shell body. The transparent element is made of transparent or light-transmitting material.

8. A hand warmer according to claim 7, characterized in that, The shell body also has a second positioning groove, which is arranged around the avoidance opening and is connected to the avoidance opening. The transparent body is adapted to the second positioning groove.

9. A hand warmer according to claim 7, characterized in that, Of the shell body and the transparent body, one has a snap-fit ​​groove and the other has a snap-fit ​​protrusion. The snap-fit ​​protrusion is inserted into the snap-fit ​​groove to connect the shell body and the transparent body together.

10. A hand warmer according to claim 7, characterized in that, The shell body includes: The lower housing has the clearance opening and the second positioning groove; and The upper shell has the first positioning groove and the communicating opening. The upper shell and the lower shell are connected and form the inner cavity.

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