Combined hand warmer

Abstract

A combined hand warmer comprises a first heating body, a second heating body, a connecting part and a locking part. The connecting part comprises an inserting block located on the first heating body and a connecting block located on the second heating body, and an inserting groove matched with the inserting block is formed in the connecting block; the locking part comprises a movable hole located in the inner face of the first heating body, a lock hole located in the inner face of the second heating body and an elastic piece installed in the first heating body, and a lock block located at the movable hole and matched with the lock hole is arranged on the elastic piece. The connecting part is used in cooperation with the locking part, so that the first heating body and the second heating body can be assembled, due to the fact that the pressure borne by the elastic piece is weak and the movement range is small in the assembling process, the structural stability is high, and due to the fact that the elastic piece can be contracted into the movable hole when making contact with an object, damage is avoided, and the service life is long.

Description

Technical Field

[0001] The utility model belongs to the technical field of hand warmers, in particular to a combined hand warmer. Background Art

[0002] A hand warmer is an electronic product that can be used as a heat source. It mainly generates heat and keeps warm through the heating sheet inside the shell. Traditional hand warmers are mostly single-unit settings, which cannot be used to warm both hands / multiple body parts at the same time, and are difficult to meet the needs of users. If you carry multiple single-unit hand warmers for warmth when going out, it will take up a lot of space and have poor portability.

[0003] To this end, the patent with application number 2023220780509 proposes a combined hand warmer power bank, which includes a first split body and a second split body. The first split body and the second split body are provided with an adaptive card body and a card slot for preliminary limiting, and buckles are also provided at both ends of the card body, and snap-in grooves are provided at both ends of the card slot. The buckle and the snap-in groove cooperate to be snapped together to make the first split body and the second split body detachable.

[0004] This solution can solve the problems existing in traditional hand warmers, but in actual use, it is found that the buckle can easily loosen when the first and second parts are bent, the structural stability is poor, and the exposed buckle is easily bumped and damaged, resulting in a short service life. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model provides a combined hand warmer which can improve structural stability and prolong service life.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A combined hand warmer comprises a first heating body, a second heating body, a connecting part and a locking part; the connecting part comprises an insert block and a connecting block, the insert block is arranged on the side of the first heating body and extends laterally, the connecting block is arranged on the side of the second heating body and is provided with a slot with a transverse opening, and the insert block can be detached from or plugged into the slot; the locking part comprises a movable hole, an elastic sheet and a locking hole, the movable hole is arranged inside the first heating body, the locking hole is arranged inside the second heating body, the elastic sheet is installed inside the first heating body, and a locking block is provided on the elastic sheet, the locking block is located at the movable hole and can be detached from or plugged into the locking hole.

[0010] Preferably, the plug block on the first heating body protrudes out of the inner surface of the first heating body, and a concave first guide opening is provided on the inner surface of the second heating body; the plug block on the first heating body can pass through the first guide opening and be plugged into the slot on the second heating body.

[0011] Preferably, a first hidden groove is provided on the first heating body, and when the connecting block on the second heating body is placed in the first hidden groove, the inserting block on the first heating body is inserted into the slot on the second heating body.

[0012] Preferably, there are two connecting parts, and the plug blocks of the two connecting parts are respectively arranged on the sides of the first heating body and the second heating body, and the connecting blocks of the two connecting parts are also respectively arranged on the first heating body and the second heating body; when the plug block on the first heating body is plugged into the slot on the second heating body, the plug block on the second heating body is synchronously plugged into the slot on the first heating body.

[0013] Preferably, the plug block on the first heating body protrudes out of the inner surface of the first heating body, and a first concave guide port is provided on the inner surface of the second heating body; the plug block on the first heating body can pass through the first guide port and be plugged into the slot on the second heating body; the plug block on the second heating body protrudes out of the inner surface of the second heating body, and a second concave guide port is provided on the inner surface of the first heating body, and the plug block on the second heating body can pass through the second guide port and be plugged into the slot on the first heating body.

[0014] Preferably, a first hidden groove is provided on the first heating body, and when the connecting block on the second heating body is placed in the first hidden groove, the plug block on the first heating body is plugged into the slot on the second heating body; a second hidden groove is provided on the second heating body, and when the connecting block on the first heating body is placed in the second hidden groove, the plug block on the second heating body is plugged into the slot on the first heating body.

[0015] Preferably, there are two locking parts, and the elastic sheets of the two locking parts are respectively installed inside the first heating body and the second heating body, and the two elastic sheets are staggered with each other; the movable holes and lock holes of the two locking parts are distributed inside the first heating body and the second heating body to respectively adapt to the locking blocks on the two elastic sheets.

[0016] Preferably, four locking portions are provided to correspond to the top and bottom sides of the first heating body and the top and bottom sides of the second heating body respectively.

[0017] Preferably, the locking block is designed to be hemispherical.

[0018] Preferably, the first heating body includes a shell, a shell cover, a battery and a heating element, the shell cover is installed on the shell and encloses a accommodating cavity, the battery and the heating element are both installed in the accommodating cavity, and the battery is electrically connected to the heating element; the second heating body has the same structure as the first heating body.

[0019] (III) Beneficial effects

[0020] The utility model provides a combined hand warmer, which is designed with a connecting part and a locking part that cooperate with each other, so as to connect and lock the first heating body and the second heating body, so as to realize assembly and disassembly between the two, thereby improving versatility; during the assembly and disassembly process, since the inside of the first heating body and the inside of the second heating body are kept in close contact, the elastic sheet located inside the first heating body only needs to withstand the pressure applied to the locking block by the second heating body to perform adaptive deformation, so the pressure borne by the elastic sheet is weaker and the deformation amplitude is smaller, which can reduce the possibility of loosening and improve the structural stability; after the first heating body is separated from the second heating body, the elastic sheet is reset and drives the locking block to protrude from the movable hole to the outside, but since the elastic sheet has the ability to deform, the exposed locking block will quickly shrink into the movable hole when it contacts an object, so as to prevent the elastic sheet from being damaged by a rigid collision with the object, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 A schematic diagram of the assembled hand warmer is shown;

[0023] Figure 2 Shows Figure 1 A top view of

[0024] Figure 3 Shows Figure 2 Sectional view AA;

[0025] Figure 4 Shows Figure 3 The enlarged view of point A in the middle;

[0026] Figure 5 Shows Figure 2 BB of the cross-sectional view;

[0027] Figure 6 Shows Figure 5 The enlarged view of point B in the middle;

[0028] Figure 7 Shows the hand warmer after separation Figure 1 ;

[0029] Figure 8 Shows the hand warmer after separation Figure 2 ;

[0030] Fig. 9 Shows Figure 7 Schematic diagram of the decomposition of

[0031] Fig.10 Shows Fig. 9 Enlarged view of point C in the middle;

[0032] Fig.11 An exploded schematic diagram of a first heating body is shown;

[0033] Fig.12 Shows Fig.11 Enlarged view of point D in the middle.

[0034] In the figure: 1 a first heating body, 10 a shell, 100 a accommodating cavity, 101 a first hidden groove, 102 a second guide port, 11 a shell cover, 12 a battery, 13 a heating element, 131 a circuit board, 132 a heating plate, 133 a control button, 134 a charging terminal, 135 a display light, 2 a second heating body, 201 a first guide port, 202 a second hidden groove, 3 a connecting portion, 31 an insert block, 32 a connecting block, 320 a slot, 4 a locking portion, 41 a movable hole, 42 a lock hole, 43 an elastic sheet, and 430 a lock block. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present application. It is understood that the drawings are only provided for reference and illustration, and are not used to limit the present application. The connection relationship shown in the drawings is only for the convenience of clear description and does not limit the connection method.

[0036] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intermediate component at the same time. Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as those generally understood by technicians in the technical field to which this application belongs. It should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. The terms used in this document in the specification of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application.

[0037] It should also be noted that in the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] See attached Figure 1 -Attached Figure 8 and attached Fig.11 -Attached Fig.12 A combined hand warmer comprises a first heating body 1, a second heating body 2, a connecting part 3 and a locking part 4; the connecting part 3 comprises an insert block 31 and a connecting block 32, the insert block 31 is arranged on the side of the first heating body 1 and extends laterally, the connecting block 32 is arranged on the side of the second heating body 2 and is provided with a slot 320 with a transverse opening, and the insert block 31 can be detached from or plugged into the slot 320; the locking part 4 comprises a movable hole 41, a locking hole 42 and an elastic sheet 43, the movable hole 41 is arranged on the inner surface of the first heating body 1, the locking hole 42 is arranged on the inner surface of the second heating body 2, the elastic sheet 43 is installed inside the first heating body 1, and a locking block 430 is provided on the elastic sheet 43, the locking block 430 is located at the movable hole 41 and can be detached from or engaged with the locking hole 42.

[0039] Specifically, under normal circumstances, the plug block 31 is plugged into the slot 320 of the connecting block 32 to limit the relative rotation and longitudinal / vertical movement between the first heating body 1 and the second heating body 2. At the same time, under the action of the elastic sheet 43, the locking block 430 is engaged with the locking hole 42 to limit the lateral / vertical movement of the first heating body 1 and the second heating body 2, thereby combining the first heating body 1 and the second heating body 2 into a hand warmer for easy carrying outside.

[0040] When the first heating body 1 or the second heating body 2 is bent laterally, the elastic sheet 43 will be deformed and compressed under the pressure of the inner surface of the second heating body 2, so that the locking block 430 will gradually disengage from the locking hole 42 and enter the movable hole 41. At the same time, the insertion block 31 will also disengage from the slot 320 to release the connection restriction between the first heating body 1 and the second heating body 2, so that the first heating body 1 and the second heating body 2 can be used separately.

[0041] If it is necessary to combine the first heating body 1 and the second heating body 2 again, first fit the inner surface of the first heating body 1 against the inner surface of the second heating body 2, and squeeze the locking block 430 into the movable hole 41 through the inner surface of the second heating body 2. Then, move the first heating body 1 or the second heating body 2 laterally until the insertion block 31 is inserted into the slot 320 on the connecting block 32. Then, the locking block 430 is reset to protrude from the movable hole 41 and engages with the locking hole 42, so that the first heating body 1 and the second heating body 2 are connected and fixed.

[0042] In summary, the utility model is designed to connect and lock the first heating body 1 and the second heating body 2 by means of the coupling part 3 and the locking part 4 that cooperate with each other, so as to realize the assembly and disassembly between the two, thereby improving the versatility; during the assembly and disassembly process, since the inner surface of the first heating body 1 and the inner surface of the second heating body 2 remain in close contact, the elastic sheet 43 located inside the first heating body 1 only needs to withstand the pressure applied by the second heating body 2 to the locking block 430 to perform adaptive deformation, so the pressure borne by the elastic sheet 43 is weak and the deformation amplitude is small, which can reduce the possibility of loosening and improve the structural stability; after the first heating body 1 is separated from the second heating body 2, the elastic sheet 43 is reset and drives the locking block 430 to protrude the movable hole 41 to the outside, but since the elastic sheet 43 has the ability to deform, the exposed locking block 430 will quickly shrink into the movable hole 41 when it contacts an object, so as to prevent the elastic sheet 43 from being damaged by a rigid collision with the object, thereby extending the service life.

[0043] See attached Figure 7 -Attached Figure 8 The plug block 31 on the first heating body 1 protrudes from the inner surface of the first heating body 1, and a concave first guide opening 201 is provided on the inner surface of the second heating body 2; the plug block 31 on the first heating body 1 can pass through the first guide opening 201 and be plugged into the slot 320 on the second heating body 2.

[0044] Specifically, when assembling the hand warmer, the inner surface of the first heating body 1 is attached to the inner surface of the second heating body 2, and the protruding portion of the plug block 31 is placed in the first guide opening 201. The first guide opening 201 can limit and guide the plug block 31 so that the plug block 31 can be accurately and quickly plugged into the slot 320 of the connecting block 32;

[0045] When disassembling the hand warmer, push the first heating body 1 or the second heating body 2 horizontally until the insert block 31 completely disengages from the slot 320 and enters the first guide port 201 , and there is an obvious sense of obstruction, so as to prompt the user to remove the second heating body 2 from the first heating body 1 longitudinally.

[0046] Therefore, the combined use of the plug block 31 and the first guide port 201 on the first heating body 1 can not only ensure the assembly accuracy between the first heating body 1 or the second heating body 2 and improve the convenience of use, but also give the user feedback to prompt the current position between the first heating body 1 or the second heating body 2, making it convenient for the user to disassemble the hand warmer and improving the operating feel.

[0047] See attached Figure 7 -Attached Figure 8 A first hidden groove 101 is provided on the first heating body 1. When the connecting block 32 on the second heating body 2 is placed in the first hidden groove 101, the plug block 31 on the first heating body 1 is plugged into the slot 320 on the second heating body 2; when the connecting block 32 on the second heating body 2 is away from the first hidden groove 101, the plug block 31 on the first heating body 1 is disengaged from the slot 320 on the second heating body 2.

[0048] Among them, since the first hidden groove 101 can be socketed and restricted on the connecting block 32 on the second heating body 2, on the one hand, it can improve the connection stability of the first heating body 1 and the second heating body 2 after assembly; on the other hand, it can also avoid the existence of protruding parts on the sides of the hand warmer after assembly, thereby ensuring the overall aesthetics and making it convenient for users to hold and carry.

[0049] See attached Figure 1 -Attached Figure 8 There are two connecting parts 3, and the plug blocks 31 of the two connecting parts 3 are respectively arranged on the sides of the first heating body 1 and the sides of the second heating body 2, and the connecting blocks 32 of the two connecting parts 3 are also respectively arranged on the first heating body 1 and the second heating body 2; when the plug block 31 on the first heating body 1 is plugged into the slot 320 on the second heating body 2, the plug block 31 on the second heating body 2 is synchronously plugged into the slot 320 on the first heating body 1.

[0050] Specifically, when assembling the hand warmer, the inner surface of the first heating body 1 is attached to the inner surface of the second heating body 2, so that the plug block 31 and the slot 320 on the first heating body 1 are respectively aligned with the slot 320 and the plug block 31 on the second heating body 2, and then the first heating body 1 or the second heating body 2 is moved laterally so that the corresponding plug block 31 and the slot 320 are plugged into each other. At this time, the locking block 430 is engaged with the locking hole 42 to fix the first heating body 1 and the second heating body 2 to each other; therefore, the design of the two connecting parts 3 can simultaneously limit the two opposite sides of the first heating body 1 and the second heating body 2 to further improve the overall structural stability.

[0051] See attached Figure 6 -Attached Fig. 9 The plug block 31 on the first heating body 1 protrudes from the inner surface of the first heating body 1, and a concave first guide port 201 is provided on the inner surface of the second heating body 2; the plug block 31 on the first heating body 1 can pass through the first guide port 201 and be plugged into the slot 320 on the second heating body 2; the plug block 31 on the second heating body 2 protrudes from the inner surface of the second heating body 2, and a concave second guide port 102 is provided on the inner surface of the first heating body 1, and the plug block 31 on the second heating body 2 can pass through the second guide port 102 and be plugged into the slot 320 on the first heating body.

[0052] Specifically, the second guide opening 102 and the first guide opening 201 can respectively limit and guide the plug block 31 on the second heating body 2 and the plug block 31 on the first heating body 1, so that the corresponding plug block 31 can be accurately and quickly plugged into the corresponding slot 320; it can not only ensure the assembly accuracy between the first heating body 1 or the second heating body 2 and improve the convenience of use, but also give the user feedback to prompt the current position between the first heating body 1 or the second heating body 2, thereby improving the operating feel.

[0053] See attached Figure 6 -Attached Fig. 9 The first heating body 1 is provided with a first hidden groove 101. When the connecting block 32 on the second heating body 2 is placed in the first hidden groove 101, the plug block 31 on the first heating body 1 is plugged into the slot 320 on the second heating body 2; the second heating body 2 is provided with a second hidden groove 202. When the connecting block 32 on the first heating body 1 is placed in the second hidden groove 202, the plug block 31 on the second heating body 2 is plugged into the slot 320 on the first heating body 1.

[0054] Among them, since the first hidden groove 101 can be socketed and restricted on the connecting block 32 on the second heating body 2, and the second hidden groove 202 can be socketed and restricted on the connecting block 32 on the first heating body 1, on the one hand, the stability of the first heating body 1 and the second heating body 2 after assembly can be further improved; on the other hand, it can also avoid the existence of protruding parts on both sides of the hand warmer after assembly, thereby ensuring the overall aesthetics and making it convenient for users to hold and carry.

[0055] See attached Figure 7 -Attached Fig.12 There are two locking parts 4, and the elastic sheets 43 of the two locking parts 4 are respectively installed in the first heating body 1 and the second heating body 2, and the two elastic sheets 43 are staggered with each other; the movable holes 41 and the locking holes 42 of the two locking parts 4 are distributed on the inner surface of the first heating body 1 and the inner surface of the second heating body 2, so as to respectively adapt to the locking blocks 430 on the two elastic sheets 43.

[0056] Specifically, during the process of inserting the plug 31 into the slot 320, the inner surface of the first heating body 1 squeezes the locking block 430 on the second heating body 2 into the movable hole 41 on the second heating body 2, and the inner surface of the second heating body 2 simultaneously squeezes the locking block 430 on the first heating body 1 into the movable hole 41 on the first heating body 1; after the plug 31 is inserted into the slot 320, the locking block 430 on the first heating body 1 protrudes from the movable hole 41 on the first heating body 1 and engages with the locking hole 42 on the second heating body 2, and the locking block 430 on the second heating body 2 simultaneously protrudes from the movable hole 41 on the second heating body 2 and engages with the locking hole 42 on the first heating body 1.

[0057] Among them, the assembled hand warmer mainly limits the mutual rotation between the first heating body 1 and the second heating body 2 by the cooperation of the plug block 31 and the slot 320, which will increase the burden on the plug block 31 and the slot 320 and affect the stability after connection; and the two staggered elastic sheets 43 can form two locking points on the first heating body 1 and the second heating body 2 at the same time. The two locking points can limit the inner surface of the first heating body 1 and the inner surface of the second heating body 2 to the same straight line to prevent the first heating body 1 and the second heating body 2 from rotating, further improving the overall structural stability.

[0058] Furthermore, four locking parts 4 are provided to correspond to the top and bottom sides of the first heating body 1 and the top and bottom sides of the second heating body 2 respectively; this design can form four locking points on the first heating body 1 and the second heating body 2 at the same time, and the four locking points can limit the inner surface of the first heating body 1 and the inner surface of the second heating body 2 to the same plane to prevent rotation and displacement between the first heating body 1 and the second heating body 2, thereby further improving the overall structural stability.

[0059] See attached Figure 7 -Attached Fig.12 The locking block 430 is hemispherical, and this design makes the surface of the locking block 430 smooth, which can effectively prevent the locking block 430 from scratching the user when it is exposed.

[0060] See attached Figure 3 and attached Fig. 9 -Attached Fig.11 The first heating body 1 includes a shell 10, a shell cover 11, a battery 12 and a heating element 13. The shell cover 11 is installed on the shell 10 and encloses a accommodating cavity 100. The battery 12 and the heating element 13 are both installed in the accommodating cavity 100, and the battery 12 is electrically connected to the heating element 13; the second heating body 2 can have the same structure as the first heating body 1.

[0061] Specifically, when in use, the heating element 13 is powered by the battery 12, so that the heating element 13 can emit heat, and the user can keep warm by holding the shell 10. The matching design of the shell 10 and the shell cover 11 facilitates the disassembly and assembly of the battery 12 and the heating element 13 for easy maintenance.

[0062] Furthermore, the heating element 13 is mainly composed of components such as a circuit board 131, an electric heating plate 132, a control button 133, a charging terminal 134 and a display light 135. The circuit board 131 and the electric heating plate 132 are both installed in the accommodating cavity 100, while the control button 133, the charging terminal 134 and the display light 135 are installed on the shell 10 or the shell cover 11, and the components are electrically connected.

[0063] The user can charge the battery 12 through the charging terminal 134, and can control the battery 12 to supply power to the electric heating plate 132 through the control button 133, thereby making the electric heating plate 132 generate heat and provide heating; and the display light 135 is used to display the power of the battery 12 or for lighting; because the relevant structure is relatively conventional in the technical field, the specific circuit structure and working principle thereof are not elaborated in detail in the utility model.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined hand warmer, comprising a first heating body (1) and a second heating body (2), characterized in that: Also includes: A connecting portion (3), the connecting portion (3) comprising an insert block (31) and a connecting block (32), the insert block (31) being arranged on the side of the first heating body (1) and extending laterally, the connecting block (32) being arranged on the side of the second heating body (2) and being provided with a slot (320) with a transverse opening, the insert block (31) being able to be detached from or inserted into the slot (320); A locking portion (4), the locking portion (4) comprising a movable hole (41), a locking hole (42) and an elastic sheet (43), the movable hole (41) being arranged on the inner surface of the first heating body (1), the locking hole (42) being arranged on the inner surface of the second heating body (2), the elastic sheet (43) being installed inside the first heating body (1), and a locking block (430) being arranged on the elastic sheet (43), the locking block (430) being located at the movable hole (41) and being able to be separated from or engaged with the locking hole (42).

2. A combined hand warmer according to claim 1, characterized in that: The insert block (31) on the first heating body (1) protrudes from the inner surface of the first heating body (1), and a concave first guide opening (201) is provided on the inner surface of the second heating body (2); the insert block (31) on the first heating body (1) can pass through the first guide opening (201) and be inserted into the slot (320) on the second heating body (2).

3. A combined hand warmer according to claim 1, characterized in that: The first heating body (1) is provided with a first hidden groove (101); when the connecting block (32) on the second heating body (2) is placed in the first hidden groove (101), the inserting block (31) on the first heating body (1) is inserted into the slot (320) on the second heating body (2).

4. A combined hand warmer according to claim 1, characterized in that: The connecting parts (3) are provided with two, and the plug blocks (31) of the two connecting parts (3) are respectively arranged on the side of the first heating body (1) and the side of the second heating body (2), and the connection blocks (32) of the two connecting parts (3) are also respectively arranged on the first heating body (1) and the second heating body (2); when the plug block (31) on the first heating body (1) is plugged into the slot (320) on the second heating body (2), the plug block (31) on the second heating body (2) is simultaneously plugged into the slot (320) on the first heating body (1).

5. A combined hand warmer according to claim 4, characterized in that: The insert block (31) on the first heating body (1) protrudes from the inner surface of the first heating body (1), and a concave first guide opening (201) is provided on the inner surface of the second heating body (2); the insert block (31) on the first heating body (1) can pass through the first guide opening (201) and be inserted into the slot (320) on the second heating body (2); The insert block (31) on the second heating body (2) protrudes from the inner surface of the second heating body (2); a concave second guide opening (102) is provided on the inner surface of the first heating body (1); the insert block (31) on the second heating body (2) can pass through the second guide opening (102) and be inserted into the slot (320) on the first heating body (1).

6. A combined hand warmer according to claim 4, characterized in that: The first heating body (1) is provided with a first hidden groove (101), and when the connecting block (32) on the second heating body (2) is placed in the first hidden groove (101), the inserting block (31) on the first heating body (1) is inserted into the slot (320) on the second heating body (2); The second heating body (2) is provided with a second hidden groove (202); when the connecting block (32) on the first heating body (1) is placed in the second hidden groove (202), the inserting block (31) on the second heating body (2) is inserted into the slot (320) on the first heating body (1).

7. A combined hand warmer according to claim 1, characterized in that: Two locking parts (4) are provided, and the elastic sheets (43) of the two locking parts (4) are respectively installed inside the first heating body (1) and inside the second heating body (2), and the two elastic sheets (43) are staggered with each other; the movable holes (41) and the locking holes (42) of the two locking parts (4) are distributed on the inner surface of the first heating body (1) and the inner surface of the second heating body (2) to respectively adapt to the locking blocks (430) of the two elastic sheets (43).

8. A combined hand warmer according to claim 7, characterized in that: Four locking portions (4) are provided to correspond to the top and bottom sides of the first heating body (1) and the top and bottom sides of the second heating body (2), respectively.

9. A combined hand warmer according to any one of claims 1, 7 and 8, characterized in that: The locking block (430) is designed to be hemispherical.

10. The combined hand warmer according to claim 1, characterized in that: The first heating body (1) comprises a shell (10), a shell cover (11), a battery (12) and a heating element (13); the shell cover (11) is mounted on the shell (10) and encloses a receiving cavity (100); the battery (12) and the heating element (13) are both mounted in the receiving cavity (100), and the battery (12) is electrically connected to the heating element (13); the second heating body (2) has the same structure as the first heating body (1).

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