Rotary clamping type hand warmer

Abstract

The utility model provides a rotary clamping type hand warmer which comprises a bottom shell and a top shell. More than two arc-shaped buckles are arranged on the bottom shell, the arc-shaped buckles are arranged on the circumference of the same circle, and the arc-shaped buckles are symmetrical relative to the circle center of the circle; the concave section is gradually concave and extends from the outer surface of the bottom shell to the inside of the bottom shell, the convex section is gradually convex and extends from the outer surface of the bottom shell to the outside of the bottom shell, and the terminal end of the concave section is connected with the terminal end of the convex section; and the convex section is provided with a buckling part which can partially cover the concave section in the thickness direction of the bottom shell. According to the scheme, when two hand warmers need to be connected, the convex section of one hand warmer is matched with the concave section of the other hand warmer, and the hand warmers are relatively rotated, so that the buckling part of one hand warmer is buckled with the buckling part of the other hand warmer, and the two hand warmers can be stably connected through the bottom shell; and the weight and the manufacturing cost of the hand warmer are not increased.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating products, in particular to a rotary snap-fit ​​hand warmer. Background Art

[0002] There are many types of hand warmers, including hot water bag type, chemical reaction heated type and electric heating type. Electric heating type is the most widely used because of its small size, ease of use and controllable temperature.

[0003] In order to enable hand warmers to heat our hands at the same time, hand warmers are usually sold and used in pairs. However, when not in use, it is easy to lose one of the paired hand warmers. Therefore, it is necessary to find a way to quickly connect the two hand warmers when not in use to prevent loss and facilitate carrying.

[0004] A patent document with authorization announcement number CN219847034U discloses a magnetic snap-on hand warmer. This solution enables the combined use of two electric warmers through the rotational coordination of a male button and a female button. The relative positions of the first plastic back shell and the second plastic back shell are fixed by the first magnetic block and the second magnetic block to prevent the first plastic back shell and the second plastic back shell from rotating and causing the male button and the female button to rotate and separate, solving the problem that traditional electric warmers are relatively large in size and carrying multiple electric warmers at the same time easily takes up a certain amount of space.

[0005] However, this solution still has its shortcomings. After being attracted by the magnetic block, the two hand warmers are still prone to relative rotation, affecting the appearance and storage. In addition, the installation of the magnetic block will inevitably increase the weight and manufacturing cost of the hand warmers. Therefore, it is necessary to design a solution that can achieve reliable combination of the two hand warmers through its own structural characteristics. Summary of the Invention

[0006] The utility model aims to solve the technical problems in the prior art of heavy weight, high production cost and easy rotation and dislocation of two hand warmers after being combined.

[0007] In order to solve the above technical problems, the utility model provides a rotating snap-fit ​​hand warmer, comprising a bottom shell and a top shell detachably connected to the bottom shell, the bottom shell and the top shell together form a accommodating cavity, a heat-conducting decorative sheet is embedded in the top shell, and a heating sheet is provided on the heat-conducting decorative sheet; more than two arc-shaped buckles are provided on the bottom shell for connecting the hand warmer, the arc-shaped buckles are arranged on the circumference of the same circle, and the arc-shaped buckles are symmetrical with respect to the center of the circle; the arc-shaped buckles include a concave section that gradually concave and extends from the outer surface of the bottom shell to the inside of the bottom shell and a convex section that gradually convex and extends from the outer surface of the bottom shell to the outside of the bottom shell, the terminal end of the concave section is connected to the terminal end of the convex section; the convex section has a buckle portion that can partially cover the concave section in the thickness direction of the bottom shell.

[0008] The above structure provides two arc-shaped buckles symmetrical with respect to the center of a circle on the bottom shell of the hand warmer. When two hand warmers need to be connected, the raised section of one hand warmer is matched with the recessed section of the other hand warmer, and the hand warmers are rotated relative to each other so that the buckle portion of one hand warmer is buckled with the buckle portion of the other hand warmer. This solution can achieve a stable connection between the two hand warmers through the bottom shell itself. This solution does not require the provision of a magnetic block and is not easy to be dislocated and separated after being subjected to force. Without increasing the weight and manufacturing cost of the hand warmers, the two hand warmers can be quickly and reliably combined. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of the embodiments of the present utility model combined with each other;

[0010] Figure 2 This is a front view of an embodiment of the utility model;

[0011] Figure 3 This is a rear view of an embodiment of the present utility model;

[0012] Figure 4 This is a three-dimensional structural diagram of an embodiment of the utility model;

[0013] Figure 5 This is an exploded view of an embodiment of the present utility model;

[0014] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0015] Figure 7 It is a side view of an embodiment of the present utility model. DETAILED DESCRIPTION

[0016] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0017] like Figures 1 to 7 As shown, a rotating snap-fit ​​hand warmer includes a bottom shell 2 and a top shell 1 detachably connected to the bottom shell 2. The top shell 1 and the bottom shell 2 together form a receiving cavity 100. The top shell 1 and the bottom shell 2 are tightly connected by a snap. Since the snap structure is a common existing technology, its specific structure is not detailed here. In this embodiment, to reduce production costs and achieve lightweight, the top shell 1 and the bottom shell 2 are made of plastic injection molding.

[0018] A heat-conducting decorative sheet 11 is embedded in the top shell 1 , and a heating sheet 12 is provided on the heat-conducting decorative sheet 11 . The heat-conducting decorative sheet 11 is usually formed by stamping an aluminum alloy sheet.

[0019] The specific structure is as follows: a decorative piece mounting portion 110 is provided on the top shell 1, and the decorative piece mounting portion 110 is offset from one side of the top shell 1 to the side of the bottom shell 2. Usually, the offset distance is the thickness of the thermal conductive decorative piece 11. In this way, when the thermal conductive decorative piece 11 is installed on the top shell 1, there is no height difference between the thermal conductive decorative piece 11 and the top shell 1 after matching, the transition is smooth, and the feel is good.

[0020] A groove 111 extending toward the bottom shell 2 is provided at the transition connection between the decorative sheet mounting portion 110 and the top shell 1 . The groove 111 is used to accommodate the edge of the thermal conductive decorative sheet 11 so that the thermal conductive decorative sheet 11 can fit tightly against the bottom shell 1 .

[0021] More than two clips 112 are provided around the groove 111 on the top shell 1. In this embodiment, there are four clips 112, and a clipping portion (not shown) protruding to the side is provided at the end of the clip 112; a boss 113 corresponding to the clip 112 is provided along the edge of the thermal conductive decorative sheet 11, and a clipping hole is opened on the boss 113. When the thermal conductive decorative sheet 11 is buckled on the top shell 1, the clipping portion pops into the clipping hole.

[0022] A heating plate avoidance cavity 114 is provided on the decorative plate installation portion 110 , and a wire avoidance hole 115 and a sensor avoidance hole 116 are opened at the bottom of the heating plate avoidance cavity 114 . The wire avoidance hole 115 and the sensor avoidance hole 116 are provided to facilitate installation and provide space for wires and sensors.

[0023] A PCB board 3 and a battery 4 are provided in the accommodating cavity 100 , and the heating sheet 12 , the PCB board 3 and the battery 4 are electrically connected.

[0024] An indicator light 30, a push button switch 31, and an electrical connector 32 are provided on the PCB 3. Through holes corresponding to the indicator light 30 and push button switch 31 are provided in the top shell 1. A button 5 is also provided inside the top shell 1. One side of the button 5 contacts the push button switch 31, while the other side of the button 5 passes through the through hole and exits the top shell 1. A notch is provided in both the top shell 1 and the bottom shell 2 to accommodate the electrical connector 32. During use, pressing the button 5 turns the power on and off and adjusts the power level.

[0025] like Figure 3 As shown, more than two arc-shaped buckles 6 are provided on the bottom shell 2; the arc-shaped buckles 6 are arranged on the circumference of the same circle, and the arc-shaped buckles 6 are symmetrical with respect to the center of the circle.

[0026] The arc-shaped buckle 6 includes a recessed section 60 that gradually recesses and extends from the outer surface of the bottom shell 2 to the inside of the bottom shell 2, and a raised section 61 that gradually raises and extends from the outer surface of the bottom shell 2 to the outside of the bottom shell 2. The terminal end of the recessed section 60 is connected to the terminal end of the raised section 61; the raised section 61 has a buckle portion 63 that can partially cover the recessed section 60 in the thickness direction of the bottom shell 2.

[0027] like Figures 3 to 5 As shown, in this embodiment, there are two arc-shaped buckles 6: a first arc-shaped buckle and a second arc-shaped buckle. The first arc-shaped buckle is distributed within the range of 0°-180°, and the second arc-shaped buckle is distributed within the range of 180°-360°. Of course, the first and second arc-shaped buckles do not necessarily need to cover 360 degrees; the first and second arc-shaped buckles can simply cover opposite parts of their respective circles. In addition, the number of arc-shaped buckles 6 can also be four or eight.

[0028] The cross-section of the recessed section 60 is linear at its starting point and circular at its ending point. The cross-section of the raised section 61 is linear at its starting point and circular at its ending point. Of course, these cross-sections can also be triangular, trapezoidal, or polygonal. The linear starting point allows the starting point to be flush with the outer surface of the bottom shell 2. Because the raised section 61 protrudes from the outer surface of the bottom shell 2, the circular cross-section of the raised section 61 protruding from the bottom shell 2 does not scratch the hand, providing a comfortable grip during use.

[0029] The side of the buckle portion 63 facing the recessed section 60 is set to be arc-shaped. This setting not only provides guidance when the two buckle portions 63 are buckled together, but also prevents the buckle portions 63 from scratching the hands, providing a good grip when in use.

[0030] A clearance hole 65 is provided at the terminal end of the recessed section 60 to facilitate the molding of the buckle portion 63. Since the buckle portion 63 partially covers the recessed section 60, if the clearance hole 65 is not provided, it will be difficult to mold the buckle portion 63 during injection molding of the bottom shell 2.

[0031] Since the avoidance hole 65 penetrates the bottom shell 2, the internal structure can be seen from the outside of the bottom shell 2, which affects the appearance. Therefore, a cover plate 66 that can cover the avoidance hole 65 is provided inside the bottom shell 2, and a fixing column 67 is provided on the inner wall of the raised section 61. A hole that can cooperate with the fixing column is opened on the cover plate 66. When installing the cover plate 66, align the hole with the fixing column 67 and press it down. The battery 4 arranged in the accommodating cavity 100 can prevent the cover plate 66 from falling off from the fixing column 67.

[0032] In order to make the two locked hand warmers connected tightly, Figure 4As shown, a limiting protrusion 68 is provided on the outer surface of the recessed section 60, and a limiting cavity 69 is provided on the outer surface of the raised section 61. The limiting protrusion 68 and the limiting cavity 69 not only ensure a tight connection between the hand warmers and prevent them from being easily separated, but also provide a sense of engagement when the limiting protrusion 68 engages with the limiting cavity 69, indicating that the two hand warmers are properly engaged.

[0033] The above structure provides two arc-shaped buckles 6 symmetrical with respect to the center of a circle on the bottom shell 2 of the hand warmer. When two hand warmers need to be connected, the raised section 61 of one hand warmer is matched with the recessed section 60 of the other hand warmer, and the hand warmers are rotated relative to each other so that the buckle portion 63 of one hand warmer is buckled with the buckle portion 63 of the other hand warmer. This solution can achieve a stable connection between the two hand warmers through the bottom shell 2 itself. This solution does not require the provision of a magnetic block and is not easy to be dislocated and separated after being subjected to force. Without increasing the weight and manufacturing cost of the hand warmers, the two hand warmers can be quickly and reliably combined.

Claims

1. A rotating snap-fit ​​hand warmer, comprising a bottom shell and a top shell detachably connected to the bottom shell, wherein the bottom shell and the top shell together form a receiving cavity, characterized in that: A heat-conducting decorative sheet is embedded in the top shell, and a heating sheet is provided on the heat-conducting decorative sheet; Two or more arc-shaped buckles for connecting the hand warmer are provided on the bottom shell, and the arc-shaped buckles are provided on the circumference of the same circle and are symmetrical with respect to the center of the circle; The arc-shaped buckle includes a recessed section that gradually recesses and extends from the outer surface of the bottom shell to the inside of the bottom shell, and a raised section that gradually protrudes and extends from the outer surface of the bottom shell to the outside of the bottom shell. The terminal end of the recessed section is connected to the terminal end of the raised section; the raised section has a buckle portion that can partially cover the recessed section in the thickness direction of the bottom shell.

2. The rotating snap-fit ​​hand warmer according to claim 1, characterized in that: A PCB board and a battery are also provided in the accommodating cavity, and the heating sheet, the PCB board and the battery are electrically connected.

3. The rotating snap-fit ​​hand warmer according to claim 2, characterized in that: An indicator light, a push button switch, and an electrical connection connector are provided on the PCB board; a through hole corresponding to the indicator light and the push button switch is opened on the top shell; a button is also provided inside the top shell, one side of the button contacts the push button switch, and the other side of the button passes through the top shell through the through hole; a notch for accommodating the electrical connection connector is opened on both the top shell and the bottom shell.

4. The rotating snap-fit ​​hand warmer according to claim 1, characterized in that: A decorative sheet mounting portion is provided on the top shell, and the decorative sheet mounting portion is offset from one side of the top shell to the side of the bottom shell; a groove extending toward the side of the bottom shell is provided at the transition connection between the decorative sheet mounting portion and the top shell, and the groove is used to accommodate the edge of the heat-conducting decorative sheet; There are more than two clips arranged around the groove on the top shell, and a clipping portion protruding to the side is provided at the end of the clip; a boss corresponding to the clip is provided along the edge of the thermal conductive decorative sheet, and a clipping hole is opened on the boss. When the thermal conductive decorative sheet is buckled on the top shell, the clipping portion pops into the clipping hole.

5. The rotating snap-fit ​​hand warmer according to claim 4, characterized in that: A heating plate avoidance cavity is provided on the decorative plate installation portion, and a wire avoidance hole and a sensor avoidance hole are opened at the bottom of the heating plate avoidance cavity.

6. The rotating snap-fit ​​hand warmer according to claim 1, characterized in that: There are two arc-shaped buckles, namely a first arc-shaped buckle and a second arc-shaped buckle. The first arc-shaped buckle is distributed in the range of 0°-180°, and the second arc-shaped buckle is distributed in the range of 180°-360°.

7. The rotary snap-fit ​​hand warmer according to claim 1, characterized in that: The cross section of the concave section is straight at the starting end and arc-shaped at the ending end; the cross section of the convex section is straight at the starting end and arc-shaped at the ending end.

8. The rotating snap-fit ​​hand warmer according to claim 1, characterized in that: The side of the buckle portion facing the recessed section is configured to be in an arc shape.

9. The rotating snap-fit ​​hand warmer according to claim 1, characterized in that: A position-avoiding hole for facilitating the forming of the buckle portion is provided at the terminal end of the recessed section; and a cover plate for covering the position-avoiding hole is provided inside the bottom shell.

10. The rotating snap-fit ​​hand warmer according to claim 1, characterized in that: A limiting protrusion is provided on the outer surface of the recessed section; and a limiting cavity is provided on the outer surface of the protruding section.

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