Small hand warmer

Abstract

The utility model provides a small-sized hand warmer, which comprises a shell provided with an inner cavity and a first positioning groove, the first positioning groove is communicated with the inner cavity, and the first positioning groove is positioned on one outer side wall of the shell in a first direction; the battery is arranged in the inner cavity; the control circuit board is arranged in the inner cavity and supplies power to the battery; the heating element is arranged in the first positioning groove and is electrically connected with the control circuit board so as to control the heating element to be turned on and turned off through the control circuit board; the heat conductor is matched with the first positioning groove, the heat conductor covers the heating piece so as to seal the heating piece in the shell, the heat conductor is connected with the heating piece, and the heat conductor and the shell are bonded together. As the heat conductor and the shell are bonded together, a buckle body does not need to be arranged on the heat conductor or the shell, the buckle body cannot be broken, the heat conductor can be reliably fixed on the shell, the installation operation is simple and convenient, standardized and automatic production is easy to realize, and the installation efficiency and the quality stability can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of small household appliances, in particular to a small hand warmer. BACKGROUND

[0002] The small hand warmer is a small household appliance used for keeping warm in winter, mainly providing heat to keep warm. There are various types and application scenarios of small hand warmers, suitable for different needs and occasions.

[0003] At present, the commonly used lithium battery small hand warmers on the market mainly include a shell, a battery, a control circuit board, a heating element, a temperature sensor and a heat conductor. The battery, the control circuit board, the heating element and the temperature sensor are all arranged inside the shell; the battery provides electric energy; the control circuit board is responsible for controlling and managing the use of electric energy; the heating element converts electric energy into heat energy to provide warmth; the probe of the temperature sensor abuts against the heating element; the shell protects the internal structure and provides a comfortable holding feeling; the heat conductor is externally arranged on the shell, and the heat conductor and the heating element are connected to realize the transmission of heat from the heating element to the heat conductor, so that the user can transmit heat to the user through the heat conductor when holding the small hand warmer.

[0004] Although the above-mentioned lithium battery small hand warmer can start heating in a short time to meet the demand for rapid warming, since the heat conductor is connected together with the shell through the buckle, the buckle on the heat conductor is easy to break during installation, affecting the connection stability of the heat conductor and the shell. Invention content

[0005] The embodiment of the present application provides a small hand warmer to solve the problems in the related art, and the technical scheme is as follows:

[0006] The embodiment of the present application provides a small hand warmer, comprising:

[0007] The shell has an inner cavity and a first positioning groove, the inner cavity and the first positioning groove are arranged in sequence along a first direction of the shell, the first positioning groove is communicated with the inner cavity, and the first positioning groove is located on an outer side wall of the shell in the first direction;

[0008] The battery is arranged in the inner cavity;

[0009] The control circuit board is arranged in the inner cavity, and the control circuit board supplies power to the battery;

[0010] The heating element is arranged in the first positioning groove, and the heating element is electrically connected to the control circuit board; and

[0011] A heat-conducting body is adapted to the first positioning groove, covers the heat-generating element to enclose the heat-generating element in the shell, is connected to the heat-generating element, and is bonded to the shell.

[0012] In an embodiment, a bottom wall of the heat-conducting body and a top wall of the heat-generating element are bonded together.

[0013] In an embodiment, the first positioning groove is provided with a first connecting portion and a second connecting portion, the first connecting portion is arranged around the heat-generating element, and the second connecting portion is arranged around the first connecting portion.

[0014] The part of the bottom wall of the heat-conducting body arranged around the heat-generating element is bonded to the first connecting portion, and the side wall of the heat-conducting body is bonded to the second connecting portion.

[0015] In an embodiment, the part of the shell where the first positioning groove is located and the top wall of the heat-conducting body are at the same level.

[0016] In an embodiment, the shell is further provided with a display, the display is electrically connected to the control circuit board, and the display is used to display the working state of the small hand warmer.

[0017] In an embodiment, the shell comprises:

[0018] A shell body having the inner cavity, the first positioning groove, and an avoiding opening, the avoiding opening is communicated with the inner cavity, the avoiding opening is provided for the display, the shell body is made of non-transparent material; and

[0019] A perspective body provided on the shell body, the perspective body covers the avoiding opening to enclose the display in the shell body, the perspective body is made of transparent material or light-transmitting material.

[0020] In an embodiment, the perspective body and the heat-conducting body are respectively arranged on two sides of the shell in a first direction.

[0021] In an embodiment, the shell body is further provided with a second positioning groove, the second positioning groove is arranged around the avoiding opening, the second positioning groove is communicated with the avoiding opening, and the perspective body is adapted to the second positioning groove.

[0022] In an embodiment, one of the shell body and the perspective body has a clamping groove, and the other is provided with a clamping protrusion, the clamping protrusion is inserted into the clamping groove to connect the shell body and the perspective body together.

[0023] In one embodiment, the shell body comprises:

[0024] a lower shell having the avoiding opening, the lower shell being further provided with a first clamping part; and

[0025] an upper shell having the first positioning groove, the upper shell and the lower shell enclosing the inner cavity, the upper shell being further provided with a second clamping part, the second clamping part and the first clamping part being clamped to connect the upper shell and the lower shell together.

[0026] The advantages or beneficial effects of the above technical solutions at least include:

[0027] The small hand warmer has the first positioning groove on the shell, the heat conductor and the first positioning groove are matched, the heat conductor can be installed and positioned, the heat conductor can be quickly installed, the contact area between the shell and the heat conductor can be increased, the connection stability of the heat conductor and the shell can be improved, the heat conductor can be reliably fixed on the shell, the installation operation is simple and convenient, the standardization and automation production are easy to realize, the installation efficiency and the quality stability can be improved, the heat conductor and the shell are bonded together, the heat conductor does not need to be flanged, the precision of the heat conductor can be accurately controlled, the heat conductor and the shell bonded by the bonding connection are standard parts, the error of the heat conductor and the shell is small, the gap between the heat conductor and the shell can be effectively reduced, the overall appearance structure of the small hand warmer is more coherent, and the appearance of the small hand warmer is more beautiful.

[0028] The above summary is merely intended to illustrate the present description and is not intended to limit in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features will be readily apparent to those skilled in the art by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0029] In the drawings, like numerals refer to like elements throughout the various drawings. The drawings are not necessarily to scale, the emphasis instead being placed on the relations between various parts and on the characteristics thereof. It should be understood that these drawings are only intended to depict some embodiments of the present disclosure and should not be considered limiting.

[0030] Figure 1 is a perspective structural schematic view of the small hand warmer of the present application in a first viewing angle;

[0031] Figure 2 is a perspective structural schematic view of the small hand warmer of the present application in a second viewing angle;

[0032] Figure 3 It is a sectional view of the small hand warmer of the utility model;

[0033] Figure 4 It is an exploded view of the small hand warmer of the utility model.

[0034] 1, shell; 11, inner cavity; 12, first positioning groove; 121, first connecting part; 122, second connecting part; 13, shell main body; 131, lower shell; 1311, avoiding opening; 1312, second positioning groove; 1313, clamping groove; 1314, first buckle part; 132, upper shell; 1321, second buckle part; 14, perspective body; 141, clamping protrusion; 2, battery; 3, control circuit board; 4, heating element; 41, contact; 5, heat conductor; 6, display; 7, spring needle; 8, temperature sensor. DETAILED DESCRIPTION

[0035] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0036] Referring to Figures 1-4 , a small hand warmer of a preferred embodiment of the utility model is shown, comprising:

[0037] Shell 1, shell 1 has inner cavity 11 and first positioning groove 12, inner cavity 11 and first positioning groove 12 are sequentially arranged along the first direction of shell 1, first positioning groove 12 is communicated with inner cavity 11, and first positioning groove 12 is located on an outer side wall of shell 1 in the first direction;

[0038] Battery 2, battery 2 is arranged in inner cavity 11;

[0039] Control circuit board 3, control circuit board 3 is arranged in inner cavity 11, and control circuit board 3 supplies power for battery 2;

[0040] Heating element 4, heating element 4 is arranged in first positioning groove 12, heating element 4 is electrically connected with control circuit board 3 to control the opening and closing of heating element 4 through control circuit board 3; and

[0041] Heat conductor 5, heat conductor 5 is matched with first positioning groove 12, heat conductor 5 covers heating element 4 to seal heating element 4 in shell 1, heat conductor 5 is connected with heating element 4, and heat conductor 5 and shell 1 are bonded together.

[0042] The small hand warmer has the first positioning groove 12 on the shell 1, the heat conductor 5 is matched with the first positioning groove 12, the heat conductor 5 can be positioned and installed, the heat conductor 5 can be quickly installed, meanwhile, the contact area between the shell 1 and the heat conductor 5 can be increased, the connection stability of the heat conductor 5 and the shell 1 can be improved, more importantly, the heat conductor 5 and the shell 1 are bonded together, a buckle body does not need to be arranged on the heat conductor 5 or the shell 1, the buckle body is not broken, the heat conductor 5 can be reliably fixed to the shell 1, the installation operation is simple and convenient, standardization and automation production are easy to realize, the installation efficiency and the quality stability can be improved, the heat conductor 5 and the shell 1 are bonded together, the heat conductor 5 does not need to be flanged, the precision of the heat conductor 5 can be accurately controlled, the heat conductor 5 and the shell 1 are standard parts, the heat conductor 5 and the shell 1 have small errors, the gap between the heat conductor 5 and the shell 1 can be effectively reduced, the overall appearance structure of the small hand warmer is more coherent, and therefore the appearance of the small hand warmer is more beautiful.

[0043] It can be understood that the first direction of the shell 1 is understood as the up-down direction shown in the figure, that is, the height direction of the shell 1. Figure 1

[0044] In an embodiment, the heat conductor 5 can be bonded to the shell 1 by glue or double-sided adhesive tape.

[0045] In an embodiment, the bottom wall of the heat conductor 5 and the top wall of the heating element 4 are bonded together, that is, a glue layer is arranged between the bottom wall of the heat conductor 5 and the top wall of the heating element 4, so that the bottom wall of the heat conductor 5 and the top wall of the heating element 4 are reliably connected together, to improve the heat transfer efficiency of the heating element 4 and the heat conductor 5, and the heat conduction efficiency is higher.

[0046] In an embodiment, the heat conductor 5 can be bonded to the heating element 4 by glue or double-sided adhesive tape.

[0047] In an embodiment, the heat conductor 5 is made of aluminum material, the aluminum material has excellent heat conduction performance, and the heat conduction efficiency of the heat conductor 5 can be improved.

[0048] In other embodiments, the heat conductor 5 can also be made of copper, aluminum alloy or other materials, as long as it can play a heat conduction role.

[0049] Referring to Figure 4 ​In an embodiment, the first positioning groove 12 is provided with a first connecting portion 121 and a second connecting portion 122, the first connecting portion 121 is arranged around the heating element 4, i.e. the first connecting portion 121 is located at the edge portion of the bottom wall of the first positioning groove 12, and the second connecting portion 122 is arranged around the first connecting portion 121, i.e. the second connecting portion 122 is a side wall portion of the first positioning groove 12.

[0050] The bottom wall of the heat conduction body 5 is adhered to the first connecting portion 121 at the portion arranged around the heating element 4, and the side wall of the heat conduction body 5 is adhered to the second connecting portion 122, so as to increase the contact area between the heat conduction body 5 and the shell 1, and make the connection between the heat conduction body 5 and the shell 1 more stable and reliable, thereby effectively preventing the heat conduction body 5 from falling off the shell 1.

[0051] In an embodiment, the portion of the shell 1 where the first positioning groove 12 is located and the top wall of the heat conduction body 5 are at the same horizontal plane, so as to make the overall structure of the small hand warmer more coherent, thereby making the appearance of the small hand warmer more beautiful.

[0052] In an embodiment, the shell 1 is further provided with a display 6, the display 6 is electrically connected to the control circuit board 3, and the display 6 is used to display the working state of the small hand warmer, so as to visualize the working state of the small hand warmer, thereby improving the convenience of the small hand warmer, wherein the working state can be the current temperature of the heating element 4 or the current power of the small hand warmer.

[0053] In an embodiment, the shell 1 comprises:

[0054] a shell body 13, the shell body 13 has an inner cavity 11, a first positioning groove 12, and an avoiding opening 1311, the avoiding opening 1311 is in communication with the inner cavity 11, the avoiding opening 1311 is provided for the display 6, and the shell body 13 is made of non-transparent material; and

[0055] a perspective body 14, the perspective body 14 is arranged on the shell body 13, the perspective body 14 covers the avoiding opening 1311, so as to enclose the display 6 in the shell body 13, thereby protecting the display 6, the perspective body 14 is made of transparent material or light-transmitting material, so that the user can visually observe the content displayed by the display 6 through the perspective body 14.

[0056] In an embodiment, the perspective body 14 and the heat conduction body 5 are respectively arranged on the two sides of the shell 1 in the first direction, so as to improve the space utilization in the height direction of the shell body 13.

[0057] Referring to Figure 2In an embodiment, the shell body 13 further has a second positioning groove 1312, which is arranged around the avoiding opening 1311 and communicates with the avoiding opening 1311, and the perspective body 14 is adapted to the second positioning groove 1312, so that the perspective body 14 can be mounted and positioned by using the second positioning groove 1312, which facilitates the installation of the perspective body 14 and further increases the connection stability of the shell body 13 and the perspective body 14.

[0058] Referring to Figure 2 and Figure 4 In an embodiment, one of the shell body 13 and the perspective body 14 has a clamping groove 1313, and the other is provided with a clamping protrusion 141 which is inserted into the clamping groove 1313 to connect the shell body 13 and the perspective body 14 together. In this way, the shell body 13 and the perspective body 14 can be connected together by connecting the clamping protrusion 141 and the clamping groove 1313, which can realize tool-free installation of the perspective body 14, and the installation operation is simple and convenient, which can greatly improve the installation efficiency.

[0059] Of course, in other embodiments, the perspective body 14 can also be connected together by using fasteners such as screws, bolts, rivets, etc., or can be connected together by using a pasting method.

[0060] In order to facilitate the installation of the heating element 4, the battery 2, the control circuit board 3, etc., in an embodiment, the shell body 13 comprises:

[0061] a lower shell 131 having an avoiding opening 1311, the lower shell 131 further being provided with a first clamping portion 1314; and

[0062] an upper shell 132 having a first positioning groove 12, the upper shell 132 and the lower shell 131 surrounding an inner cavity 11, the upper shell 132 further being provided with a second clamping portion 1321 which is clamped with the first clamping portion 1314 to connect the upper shell 132 and the lower shell 131 together. In this way, the upper shell 132 and the lower shell 131 can be connected together by connecting the second clamping portion 1321 and the first clamping portion 1314, which can greatly improve the installation efficiency.

[0063] In an embodiment, one of the first clamping portion 1314 and the second clamping portion 1321 is a clamping groove, and the other is a clamping protrusion which is adapted to the clamping groove.

[0064] In an embodiment, the lower shell 131 and the upper shell 132 are further connected together by using screws to further increase the connection stability of the lower shell 131 and the upper shell 132.

[0065] In an embodiment, the battery 2 and the control circuit board 3 are arranged in sequence along the length direction of the shell 1, so as to improve the space utilization in the length direction of the shell 1.

[0066] In an embodiment, the battery 2 is a rechargeable battery 2, so as to facilitate the recycling of the battery 2. Of course, in other embodiments, the battery 2 can also be a non-rechargeable battery 2.

[0067] In an embodiment, the control circuit board 3 is provided with a spring pin 7.

[0068] The heating element 4 is provided with a contact 41, and the contact 41 and the spring pin 7 are in abutment, so as to electrically connect the heating element 4 and the control circuit board 3 together. In this way, when installing, the heating element 4 and the control circuit board 3 can be electrically connected together by abutting the contact 41 and the spring pin 7, which is more convenient and simple in installation operation, and can further improve the installation efficiency.

[0069] In other embodiments, one of the control circuit board 3 and the heating element 4 is provided with a male plug, and the other is provided with a female seat, and the female seat and the male plug are plugged together, which can also electrically connect the heating element 4 and the control circuit board 3 together, which is more convenient and simple in installation operation, and can further improve the installation efficiency.

[0070] In an embodiment, the heating element 4 includes a heating sheet, and the heating sheet is attached to the heat conductor 5. Since the heating sheet has a flat structure, the contact area between the heating sheet and the heat conductor 5 can be increased, so as to improve the heat conduction efficiency, and then improve 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 compactness and miniaturization of the small hand warmer.

[0071] In an embodiment, the heating sheet is a PI heating sheet, i.e. a polyimide heating sheet. The heating sheet has good flexibility, high insulation strength, no toxicity, and good heat resistance, so that the overall structure of the heating element 4 is more compact, and the occupied space can be greatly reduced, which is more conducive to the compactness or miniaturization design of the small hand warmer.

[0072] In other embodiments, the heating sheet can also be any one of a USB heating sheet, a silica gel heating sheet (silicone rubber heating sheet), a mica heating sheet, an MCH heating sheet, a ceramic heating sheet, a silicon heating sheet, a soft carbon crystal floor heating sheet, a PET electric heating film polyester heating sheet, an aluminum foil heating sheet, etc.

[0073] In one embodiment, the inner cavity 11 is further provided with a temperature sensor 8, which is electrically connected to the control circuit board 3. The temperature sensor 8 is used to detect the working temperature of the heating element 4, and the control circuit board 3 is used to control the heating element 4 to shut down or switch to a heat preservation mode according to the feedback information of the temperature sensor 8. In this way, when the temperature sensor 8 detects that the working temperature of the heating element 4 reaches the set temperature, the control circuit board 3 receives the feedback information of the temperature sensor 8 to control the heating element 4 to shut down in time, preventing the heating element 4 from being too hot, or the control circuit board 3 receives the feedback information of the temperature sensor 8 to switch to the heat preservation mode, so that the heating element 4 maintains the current working temperature.

[0074] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0075] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0076] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A small hand warmer, characterized in that, include: The outer shell has an inner cavity and a first positioning groove, the inner cavity and the first positioning groove are arranged sequentially along a first direction of the outer shell, the first positioning groove communicates with the inner cavity, and the first positioning groove is located on an outer side wall of the outer shell in the first direction; A battery, wherein the battery is disposed within the inner cavity; A control circuit board is disposed inside the inner cavity, and the battery supplies power to the control circuit board; A heating element is disposed in the first positioning groove and is electrically connected to the control circuit board; as well as A heat conductor is provided, which is adapted to the first positioning groove. The heat conductor covers the heating element to seal the heating element inside the housing. The heat conductor is connected to the heating element and is bonded to the housing.

2. The small hand warmer according to claim 1, characterized in that, The bottom wall of the heat conductor and the top wall of the heating element are bonded together.

3. The small hand warmer according to claim 1, characterized in that, The first positioning groove is provided with a first connecting part and a second connecting part, the first connecting part is arranged around the heating element, and the second connecting part is arranged around the first connecting part; The bottom wall of the heat conductor is bonded to the first connecting part at the portion surrounding the heating element, and the side wall of the heat conductor is bonded to the second connecting part.

4. The small hand warmer according to claim 1, characterized in that, The portion of the outer casing with the first positioning groove and the top wall of the heat conductor are on the same horizontal plane.

5. The small hand warmer according to claim 1, characterized in that, The outer casing 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 small hand warmer.

6. The small hand warmer according to claim 5, characterized in that, The outer casing includes: A shell body, the shell body having the inner cavity, 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.

7. The small hand warmer according to claim 6, characterized in that, The transparent element and the heat conductor are respectively placed on both sides of the outer casing in a first direction.

8. The small hand warmer according to claim 6, 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. The small hand warmer according to claim 8, 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. The small hand warmer according to claim 6, characterized in that, The shell body includes: The lower shell, having the clearance opening, and further comprising a first latching portion; and The upper shell has the first positioning groove, and the upper shell and the lower shell form the inner cavity. The upper shell is also provided with a second snap-fit ​​part, which engages with the first snap-fit ​​part to connect the upper shell and the lower shell together.

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