Folding structure and folding heating comb

Abstract

The utility model belongs to the technical field of folding structures, and particularly relates to a folding structure and a folding type heating comb. A first accommodating cavity is formed in the first shell, a first threading channel communicated with the first accommodating cavity is formed in the hole wall of the rotating hole, and a second accommodating cavity is formed in the second shell; the rotating shaft is provided with a second threading channel, one end of the second threading channel is communicated with the second accommodating cavity, the other end of the second threading channel forms an opening in the side part of the rotating shaft, and the opening is always communicated with the first threading channel when the first shell and the second shell are folded and unfolded; a cable penetrates through the first threading channel, the opening and the second threading channel, and two ends of the cable respectively extend into the first accommodating cavity and the second accommodating cavity; when the first shell and the second shell are folded and unfolded, the cable cannot be extruded, wire winding or wire clamping is prevented, the structure is reliable, the cost is low, and enterprise development is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of folding structures, and in particular relates to a folding structure and a folding heating comb. Background Art

[0002] In order to facilitate storage and carrying, some electrical appliances in daily life usually adopt a folding structure, such as a folding hair straightener, a folding hair curler, or a folding hair dryer. The folding structure generally includes two shells; one end of the two shells is rotatably connected by a rotating structure, one shell is provided with an electrical mechanism (such as a heating mechanism, etc.), and the other shell is provided with a control circuit board or a battery. The electrical mechanism and the control circuit board need to be electrically connected. In order to prevent the wires from being entangled or squeezed when folding, spring contact pins and spring pin mother seats are usually provided at the folding position (for example, a portable USB straightening and curling comb disclosed in Chinese Utility Model Publication No. CN219556580U). When folded, the spring contact pins separate from the spring pin mother seat and the electrical connection is disconnected. When unfolded, the spring contact pins and the spring pin mother seat contact each other and are electrically connected. However, the above-mentioned electrical connection structure is more expensive than a direct cable connection structure, which is not conducive to business development. Utility Model Content

[0003] The purpose of the utility model is to provide a folding structure and a folding heating comb, aiming to solve one of the technical problems existing in the prior art.

[0004] To achieve the above-mentioned object, an embodiment of the present invention provides a folding structure comprising a first shell and a second shell; a rotating portion is provided at one end of the first shell, and a rotating hole is provided along the axial direction of the rotating portion; a mounting portion is provided at one end of the second shell, and the mounting portion is provided with a rotating shaft, and the rotating hole is rotatably provided on the rotating shaft, so that the first shell can be folded and unfolded with the second shell around the rotating shaft;

[0005] A first accommodating cavity is provided in the first shell, a first threading channel communicating with the first accommodating cavity is formed in the wall of the rotating hole, and a second accommodating cavity is provided in the second shell; a second threading channel is provided on the rotating shaft, one end of the second threading channel is communicated with the second accommodating cavity, and the other end of the second threading channel forms an open opening on the side of the rotating shaft, and the open opening always remains in communication with the first threading channel when the first shell and the second shell are folded and unfolded;

[0006] The cable is passed through the first threading channel, the open opening and the second threading channel, and two ends of the cable extend into the first accommodating cavity and the second accommodating cavity respectively.

[0007] Optionally, two mounting portions are symmetrically provided at one end of the second shell, the two mounting portions are spaced apart, and both ends of the rotating shaft are respectively provided at the two mounting portions.

[0008] Optionally, one of the mounting portions is provided with a first mounting hole along its axial direction, and the other mounting portion is provided with a second mounting hole along its axial direction, and the rotating shaft passes through the first mounting hole, the rotating hole and the second mounting hole.

[0009] Optionally, the first mounting hole and the second mounting hole are both through holes, and a connecting cover is provided at the end of the second mounting hole away from the first mounting hole, and the diameter of the connecting cover is larger than the diameter of the second mounting hole; a limiting cover is protruded from one end of the rotating shaft, and the diameter of the limiting cover is larger than the diameter of the first mounting hole, and the other end of the rotating shaft passes through the first mounting hole, the rotating hole and the second mounting hole in sequence and is connected to the connecting cover.

[0010] Optionally, the second accommodating cavity has an introduction channel connected to the first mounting hole, one end of the first threading channel extends into the first mounting hole and is connected to the second accommodating cavity through the introduction channel; or, the second accommodating cavity has an introduction channel connected to the second mounting hole, one end of the second threading channel extends into the second mounting hole and is connected to the second accommodating cavity through the introduction channel.

[0011] Optionally, the other end edge of the rotating shaft is provided with at least one positioning groove along its axial direction, and the inner wall of the first mounting hole and / or the second mounting hole is provided with at least one positioning strip, and the positioning strip is plugged into the positioning groove.

[0012] Optionally, one of one end of the first shell and one end of the second shell is provided with a first snap-fit ​​buckle, and the other end is provided with a first snap-fit ​​groove, and when the first snap-fit ​​buckle is snap-fitted with the first snap-fit ​​groove, the first shell and the second shell are kept in an unfolded state;

[0013] And / or, one of the other end of the first shell and the other end of the second shell is provided with a second snap-fit ​​buckle, and the other is provided with a second snap-fit ​​groove, and when the second snap-fit ​​buckle is snapped into the second snap-fit ​​groove, the first shell and the second shell are kept in a folded state.

[0014] Optionally, the second shell is provided with a accommodating groove beside the mounting portion, and the first shell is provided with a supporting portion beside the rotating portion, and the supporting portion is accommodated in the accommodating groove when the first shell and the second shell are unfolded; a first limit platform is provided at the edge of the notch of the accommodating groove, and the first shell is provided with a second limit platform on the adjacent side of the supporting portion, and when the first limit platform abuts against the second limit platform, it is the maximum angle at which the first shell and the second shell are unfolded.

[0015] An embodiment of the present invention also provides a foldable heating comb, comprising a heating mechanism, a control circuit board and the above-mentioned folding structure; the heating mechanism comprises a heating element and a comb tooth seat; one of the heating element and the control circuit board is arranged in the first accommodating cavity, and the other is arranged in the second accommodating cavity, and the two ends of the cable are electrically connected to the heating mechanism and the control circuit board respectively; the comb tooth seat is against or connected to the heating element, and an end face of the comb tooth seat facing away from the heating element is provided with a plurality of heating comb teeth in an array, and the outer side wall of the first shell or the second shell 200 is provided with a mounting surface, and the heating comb teeth are provided on the mounting surface.

[0016] Optionally, the mounting surface is provided with a plurality of first comb teeth on both sides of the heating comb teeth, and the mounting surface is provided with a plurality of second comb teeth on the periphery of the heating comb teeth, and some of the second comb teeth are located between two adjacent first comb teeth; the tops of the plurality of first comb teeth are provided with a spherical end, and the spherical end is higher than the tops of the first comb teeth and the heating comb teeth.

[0017] Compared with the prior art, the above one or more technical solutions in the folding structure provided by the embodiment of the present invention have at least one of the following technical effects:

[0018] The cable is passed through the first threading channel, the open opening and the second threading channel. When the first shell and the second shell are folded and unfolded, the open opening always remains connected to the first threading channel, providing threading space for the cable, without squeezing the cable, and preventing entanglement or jamming. It is not only structurally reliable but also low-cost, which is beneficial to enterprise development.

[0019] Compared with the prior art, the above one or more technical solutions in the foldable heating comb provided by the embodiment of the present invention have at least one of the following technical effects:

[0020] When the foldable heating comb is in use, the heating element generates heat, which is transferred to the heating comb teeth through the comb tooth seat, making the heating comb teeth heat up. Using the heating comb teeth to comb your hair is not only more conducive to shaping the hair, but also transfers warmth to the scalp, promoting scalp blood circulation, relieving scalp pressure, and effectively improving scalp health.

[0021] When combing your hair, the ball end is used to contact the scalp. The surface of the ball end is smooth and will not scratch the scalp. It is safe to use. Users can also use the ball end to press the scalp to massage the scalp and relieve scalp pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 This is a structural schematic diagram of the foldable heating comb provided by the utility model in the unfolded state.

[0024] Figure 2 for Figure 1 A cutaway view of .

[0025] Figure 3 This is a structural schematic diagram of the foldable heating comb provided by the utility model in the unfolded state.

[0026] Figure 4 for Figure 3 A cutaway view of .

[0027] Figure 5 This is an exploded view of the foldable heating comb provided by the utility model.

[0028] Among them, the reference numerals in the figures are:

[0029] 100, first housing; 101, first accommodating cavity; 110, rotating portion; 120, rotating hole; 121, first threading channel; 140, first snap-fit ​​buckle; 150, second snap-fit ​​groove; 160, supporting portion; 161, second limiting platform; 170, mounting surface;

[0030] 200, second housing; 201, second accommodating chamber; 202, introduction channel; 210, mounting portion; 211, first mounting hole; 212, second mounting hole; 213, positioning bar; 220, rotating shaft; 221, second threading channel; 222, open opening; 223, slot; 224, positioning slot; 225, position limiting cover; 230, connecting cover; 233, buckle; 240, first snap-fitting slot; 250, second snap-fitting buckle; 260, accommodating slot; 261, first position limiting platform;

[0031] 300, heating mechanism; 310, heating element; 320, comb tooth seat; 321, heating comb teeth; 330, first comb teeth; 331, spherical end; 340, second comb teeth;

[0032] 400. Control circuit board; 410. Battery. DETAILED DESCRIPTION

[0033] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0034] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply 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 invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0036] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0037] In one embodiment of the present invention, referring to Figure 1-Figure 5 , provides a folding structure including a first shell 100 and a second shell 200.

[0038] Among them, reference Figure 2 、 Figure 4 and Figure 5The first housing 100 has a rotating portion 110 at one end, and a rotating hole 120 is formed along its axial direction. The second housing 200 has a mounting portion 210 at one end, and the mounting portion 210 has a rotating shaft 220. The rotating hole 120 is rotatably arranged on the rotating shaft 220, so that the first housing 100 can be folded and unfolded with the second housing 200 around the rotating shaft 220.

[0039] Among them, reference Figure 2 、 Figure 4 and Figure 5 The first housing 100 has a first accommodating cavity 101, and the wall of the rotating hole 120 defines a first threading channel 121 communicating with the first accommodating cavity 101. The second housing 200 has a second accommodating cavity 201. The rotating shaft 220 defines a second threading channel 221, one end of which communicates with the second accommodating cavity 201. The other end of the second threading channel 221 forms an open opening 222 on the side of the rotating shaft 220. The open opening 222 remains in communication with the first threading channel 121 when the first housing 100 and the second housing 200 are folded and unfolded.

[0040] Among them, reference Figure 2 、 Figure 4 and Figure 5 The cable (not shown) is passed through the first threading channel 121, the open port 222 and the second threading channel 221, and both ends of the cable extend into the first accommodating cavity 101 and the second accommodating cavity 201 respectively.

[0041] Compared with the prior art, the above one or more technical solutions in the folding structure provided by the embodiment of the present invention have at least one of the following technical effects:

[0042] Reference Figure 2 、 Figure 4 and Figure 5 The cable is passed through the first threading channel 121, the open opening 222 and the second threading channel 221. When the first shell 100 and the second shell 200 are folded and unfolded, the open opening 222 always remains connected to the first threading channel 121, providing threading space for the cable, without squeezing the cable, and preventing entanglement or jamming. It is not only structurally reliable but also low-cost, which is beneficial to corporate competition.

[0043] Further, refer to Figure 1-Figure 5Two mounting portions 210 are symmetrically provided at one end of the second housing 200. The two mounting portions 210 are spaced apart, and the two ends of the rotating shaft 220 are respectively provided on the two mounting portions 210. The rotating portion 110 is rotatably connected to the rotating shaft 220 through the rotating hole 120 and is located between the two mounting portions 210. Preferably, the periphery of the mounting portions 210 is higher than the periphery of the rotating shaft 220. The two mounting portions 210 limit the axial position of the rotating portion 110, preventing the rotating portion 110 from moving along the axial direction of the rotating shaft 220, thereby ensuring a stable rotational connection between the rotating portion 110 and the rotating shaft 220.

[0044] Furthermore, refer to Figure 5 One mounting portion 210 has a first mounting hole 211 along its axial direction, and the other mounting portion 210 has a second mounting hole 212 along its axial direction. The rotating shaft 220 is inserted through the first mounting hole 211, the rotating hole 120, and the second mounting hole 212. During installation, the rotating portion 110 is first inserted between the two mounting portions 210, and then the rotating shaft 220 is inserted into the first mounting hole 211, the rotating hole 120, and the second mounting hole 212. The rotating portion 110 is rotatably connected to the rotating shaft 220 through the rotating hole 120, facilitating installation. The rotating shaft 220 can be fixed to the first mounting hole 211 and the second mounting hole 212 by means of clipping, bonding, or screwing.

[0045] Among them, reference Figure 4 and Figure 5 The second accommodating cavity 201 has an introduction channel 202 that communicates with the first mounting hole 211. One end of the first threading channel 121 extends into the first mounting hole 211 and communicates with the second accommodating cavity 201 through the introduction channel 202. Alternatively, the second accommodating cavity 201 has an introduction channel 202 that communicates with the second mounting hole 212. One end of the second threading channel 221 extends into the second mounting hole 212 and communicates with the second accommodating cavity 201 through the introduction channel 202. A cable is threaded through the first threading channel 121, the open opening 222, and the second threading channel 221. One end of the cable extends into the first accommodating cavity 101, and the other end of the cable extends through the introduction channel 202 into the second accommodating cavity 201.

[0046] In another embodiment, referring to Figure 4 and Figure 5The first mounting hole 211 and the second mounting hole 212 are both through-holes. A connecting cover 230 is provided at one end of the second mounting hole 212 away from the first mounting hole 211. The diameter of the connecting cover 230 is larger than the diameter of the second mounting hole 212. A stopper 225 is provided at one end of the rotating shaft 220. The diameter of the stopper 225 is larger than the diameter of the first mounting hole 211. The other end of the rotating shaft 220 passes through the first mounting hole 211, the rotating hole 120, and the second mounting hole 212 in sequence and is connected to the connecting cover 230, thereby fixing the rotating shaft 220 in the first mounting hole 211 and the second mounting hole 212, facilitating installation.

[0047] Further, refer to Figure 5 One of the connecting cover 230 and the other end of the rotating shaft 220 is provided with a plurality of latches 233, while the other end is provided with a plurality of slots 223. The plurality of latches 233 engage with the plurality of slots 223, thereby securing one end of the rotating shaft 220 to the connecting cover 230 and facilitating installation. In a specific embodiment, the plurality of latches 233 are provided on the end surface of the connecting cover 230, and the plurality of slots 223 are provided on the other end of the rotating shaft 220. In other embodiments, the plurality of latches 233 are provided on the other end of the rotating shaft 220, and the plurality of slots 223 are provided on the end surface of the connecting cover 230.

[0048] Further, refer to Figure 5 The other end edge of the rotating shaft 220 is provided with at least one positioning groove 224 along its axial direction, and the inner wall of the first mounting hole 211 and / or the second mounting hole 212 is provided with at least one positioning bar 213. The positioning bar 213 cooperates with the positioning groove 224 to engage with the rotating shaft 220 so that the rotating shaft 220 is positioned and installed in the first mounting hole 211 and the second mounting hole 212, preventing the rotating shaft 220 from rotating and ensuring that the position of the open opening 222 does not change, that is, when the first shell 100 and the second shell 200 are folded and unfolded, the open opening 222 always remains connected to the first threading channel 121.

[0049] In another embodiment, referring to Figure 3-Figure 5One end of the first shell 100 and one end of the second shell 200 are provided with a first snap-fit ​​buckle 140, and the other end is provided with a first snap-fit ​​groove 240. When the first snap-fit ​​buckle 140 and the first snap-fit ​​groove 240 are engaged, the first shell 100 and the second shell 200 are maintained in the unfolded state. Specifically, when the user rotates the first shell 100 away from the second shell 200 to unfold it, the first snap-fit ​​buckle 140 and the first snap-fit ​​groove 240 maintain the first shell 100 and the second shell 200 in the unfolded state. In a natural state or during use, the first shell 100 and the second shell 200 do not fold, which is convenient for the user. When the first shell 100 is not in use and needs to be folded, the user applies a certain force to push the first shell 100 toward the second shell 200. Driven by this force, the first snap-fit ​​buckle 140 and the first snap-fit ​​groove 240 are disengaged, allowing the first shell 100 to fold toward the second shell 200.

[0050] In another embodiment, referring to Figure 4 One of the other ends of the first shell 100 and the second shell 200 is provided with a second snap-fit ​​buckle 250, and the other end is provided with a second snap-fit ​​groove 150. When the second snap-fit ​​buckle 250 is engaged with the second snap-fit ​​groove 150, the first shell 100 and the second shell 200 are maintained in a folded state. Specifically, when not in use, the second snap-fit ​​buckle 250 is engaged with the second snap-fit ​​groove 150 to maintain the first shell 100 and the second shell 200 in a folded state. In a natural state or when not in use, the first shell 100 and the second shell 200 will not automatically unfold, which is convenient for storage and carrying. When in use, the user rotates the first shell 100 away from the second shell 200 to unfold it. Driven by the above-mentioned force, the second snap-fit ​​buckle 250 and the second snap-fit ​​groove 150 are disengaged.

[0051] Further, refer to Figure 3-Figure 5 The second shell 200 is provided with a receiving groove 260 next to the mounting portion 210, and the first shell 100 is provided with a supporting portion 160 next to the rotating portion 110. The supporting portion 160 is accommodated in the receiving groove 260 when the first shell 100 and the second shell 200 are unfolded, so that the first shell 100 and the second shell 200 can be folded and unfolded smoothly.

[0052] Further, refer to Figure 3-Figure 5 The edge of the slot 260 is provided with a first limiting platform 261, and the first shell 100 is provided with a second limiting platform 161 on the side adjacent to the support portion 160. When the first limiting platform 261 abuts against the second limiting platform 161, the first shell 100 and the second shell 200 are at the maximum angle of expansion, so that the first shell 100 and the second shell 200 are expanded at 180°, which is convenient for use.

[0053] Among them, reference Figure 3-Figure 5The first snap-fit ​​buckle 140 is provided on the outer wall of the support portion 160, and the first snap-fit ​​groove 240 is provided on the groove wall of the receiving groove 260. Preferably, a first snap-fit ​​buckle 140 is provided on each of the two opposing outer walls of the support portion 160, and a first snap-fit ​​groove 240 is provided on each of the two opposing groove walls of the receiving groove 260. The two first snap-fit ​​buckles 140 are used to snap-fit ​​with the two first snap-fit ​​grooves 240, respectively.

[0054] In another embodiment of the present invention, referring to Figure 1-Figure 5 , also provides a foldable heating comb, including a heating mechanism 300, a control circuit board 400 and the above-mentioned folding structure.

[0055] Among them, reference Figure 1 、 Figure 2 and Figure 4 The heating mechanism 300 includes a heating element 310 and a comb tooth seat 320. One of the heating element 310 and the control circuit board 400 is arranged in the first accommodating cavity 101, and the other is arranged in the second accommodating cavity 201. The two ends of the cable are electrically connected to the heating mechanism 300 and the control circuit board 400 respectively. The comb tooth seat 320 is against or connected to the heating element 310. The end face of the comb tooth seat 320 facing away from the heating element 310 is provided with a plurality of heating comb teeth 321 in an array. The outer wall of the first shell 100 or the second shell 200 is provided with a mounting surface 170, and the heating comb teeth 321 are arranged on the mounting surface 170. When working, the heating element 310 generates heat, and the heat is transferred to the heating comb teeth 321 through the comb tooth seat 320, causing the heating comb teeth 321 to heat up. Combing hair with the heating comb teeth 321 is not only more conducive to shaping the hair, but also transfers the warm heat to the scalp, promoting scalp blood circulation, relieving scalp pressure, and effectively improving scalp health. Preferably, the comb tooth seat 320 is embedded on the mounting surface 170 .

[0056] In a specific embodiment, the heating element 310 and the control circuit board 400 are respectively disposed in the first accommodating cavity 101 and the second accommodating cavity 201 , and the mounting surface 170 is disposed on the outer wall of the first housing 100 .

[0057] In other embodiments, the heating element 310 and the control circuit board 400 are respectively disposed in the second accommodating cavity 201 and the first accommodating cavity 101 , and the mounting surface 170 is disposed on the outer wall of the second shell 200 .

[0058] Further, refer to Figure 1 and Figure 2The mounting surface 170 is provided with a plurality of first comb teeth 330 on both sides of the heating comb teeth 321, and a plurality of second comb teeth 340 are provided on the outer periphery of the heating comb teeth 321. Some of the second comb teeth 340 are located between two adjacent first comb teeth 330. The tops of the plurality of first comb teeth 330 are each provided with a spherical end 331, and the spherical end 331 is higher than the tops of the first comb teeth 330 and the heating comb teeth 321. When combing hair, the spherical end 331 contacts the scalp. The surface of the spherical end 331 is smooth and will not scratch the scalp, making it safe to use. The user can also use the spherical end 331 to press the scalp, massaging the scalp and relieving scalp pressure.

[0059] Further, refer to Figure 2 and Figure 4 A battery 410 is also provided in the second accommodating cavity 201. The battery 410 is electrically connected to the control circuit board 400. The battery 410 supplies power to the heating element 310 and the control circuit board 400, so that the foldable heating comb can be used in an environment where it is inconvenient to connect to electricity, and has extremely high practicality.

[0060] Among them, the control circuit board 400 is set up with an integrated chip according to actual production needs. Since the control circuit board 400 is a mature technology in the existing technology, how the control circuit board 400 controls the operation of the foldable heating comb should be well known and mastered by those skilled in the art. Therefore, the control principle of the control circuit board 400 will not be elaborated here.

[0061] The rest of this embodiment is the same as that of the first embodiment. The features not explained in this embodiment are all based on the explanations of the first embodiment and will not be described in detail here.

[0062] The above description further details the present invention in conjunction with specific preferred embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. A person skilled in the art of the present invention will appreciate that its architecture is flexible and adaptable, allowing for the development of a series of products without departing from the present invention's concept. Simple deductions or substitutions should be considered within the scope of patent protection for the present invention as defined by the submitted claims.

Claims

1. A folding structure, comprising a first shell (100) and a second shell (200); a rotating portion (110) is provided at one end of the first shell (100), and a rotating hole (120) is provided along its axial direction of the rotating portion (110); a mounting portion (210) is provided at one end of the second shell (200), and the mounting portion (210) is provided with a rotating shaft (220), and the rotating hole (120) is rotatably provided on the rotating shaft (220), so that the first shell (100) can be folded and unfolded with the second shell (200) around the rotating shaft (220); It is characterized in that A first accommodating cavity (101) is provided in the first shell (100), a first threading channel (121) communicating with the first accommodating cavity (101) is provided on the wall of the rotating hole (120), and a second accommodating cavity (201) is provided in the second shell (200); the rotating shaft (220) is provided with a second threading channel (221), one end of the second threading channel (221) is communicated with the second accommodating cavity (201), and the other end of the second threading channel (221) forms an open opening (222) on the side of the rotating shaft (220), and the open opening (222) always remains in communication with the first threading channel (121) when the first shell (100) and the second shell (200) are folded and unfolded; The cable is passed through the first threading channel (121), the open opening (222) and the second threading channel (221), and two ends of the cable extend into the first accommodating cavity (101) and the second accommodating cavity (201) respectively.

2. The folding structure according to claim 1, characterized in that: One end of the second shell (200) is symmetrically provided with two mounting portions (210), the two mounting portions (210) are spaced apart, and both ends of the rotating shaft (220) are respectively provided on the two mounting portions (210).

3. The folding structure according to claim 2, characterized in that: One of the mounting parts (210) is provided with a first mounting hole (211) along its axial direction, and the other mounting part (210) is provided with a second mounting hole (212) along its axial direction. The rotating shaft (220) is passed through the first mounting hole (211), the rotating hole (120) and the second mounting hole (212).

4. The folding structure according to claim 3, characterized in that: The first mounting hole (211) and the second mounting hole (212) are both through holes; a connecting cover (230) is provided at one end of the second mounting hole (212) away from the first mounting hole (211); the diameter of the connecting cover (230) is larger than the diameter of the second mounting hole (212); a limiting cover is convexly provided at one end of the rotating shaft (220); the diameter of the limiting cover is larger than the diameter of the first mounting hole (211); the other end of the rotating shaft (220) passes through the first mounting hole (211), the rotating hole (120) and the second mounting hole (212) in sequence and is connected to the connecting cover (230).

5. The folding structure according to claim 3, characterized in that: The second accommodating cavity (201) has an introduction channel (202) communicating with the first mounting hole (211), one end of the first threading channel (121) extends into the first mounting hole (211) and communicates with the second accommodating cavity (201) through the introduction channel (202); or the second accommodating cavity (201) has an introduction channel (202) communicating with the second mounting hole (212), one end of the second threading channel (221) extends into the second mounting hole (212) and communicates with the second accommodating cavity (201) through the introduction channel (202).

6. The folding structure according to claim 3, characterized in that: The other end edge of the rotating shaft (220) is provided with at least one positioning groove (224) along its axial direction, and the inner wall of the first mounting hole (211) and / or the second mounting hole (212) is provided with at least one positioning strip (213), and the positioning strip (213) is plugged into and matched with the positioning groove (224).

7. The folding structure according to any one of claims 1 to 6, characterized in that: One of one end of the first shell (100) and one end of the second shell (200) is provided with a first snap-fit ​​buckle (140), and the other is provided with a first snap-fit ​​groove (240); when the first snap-fit ​​buckle (140) is snap-fitted with the first snap-fit ​​groove (240), the first shell (100) and the second shell (200) are kept in an unfolded state; And / or, one of the other end of the first shell (100) and the other end of the second shell (200) is provided with a second snap-fit ​​buckle (250), and the other is provided with a second snap-fit ​​groove (150), and when the second snap-fit ​​buckle (250) is snap-fitted with the second snap-fit ​​groove (150), the first shell (100) and the second shell (200) are kept in a folded state.

8. The folding structure according to any one of claims 1 to 6, characterized in that: The second shell (200) is provided with a receiving groove (260) beside the mounting portion (210); the first shell (100) is provided with a supporting portion (160) beside the rotating portion (110); the supporting portion (160) is accommodated in the receiving groove (260) when the first shell (100) and the second shell (200) are unfolded; a first limiting platform (261) is provided on the notch edge of the receiving groove (260); the first shell (100) is provided with a second limiting platform (161) on the adjacent side of the supporting portion (160); when the first limiting platform (261) abuts against the second limiting platform (161), the maximum angle at which the first shell (100) and the second shell (200) are unfolded is reached.

9. A foldable heating comb, characterized in that: The invention comprises a heating mechanism (300), a control circuit board (400) and a folding structure according to any one of claims 1 to 8; the heating mechanism (300) comprises a heating element (310) and a comb tooth seat (320); one of the heating element (310) and the control circuit board (400) is arranged in the first accommodating cavity (101), and the other is arranged in the second accommodating cavity (201); the two ends of the cable are electrically connected to the heating mechanism (300) and the control circuit board (400) respectively; the comb tooth seat (320) is against or connected to the heating element (310), and a plurality of heating comb teeth (321) are arranged in an array on an end face of the comb tooth seat (320) facing away from the heating element (310); the outer side wall of the first shell (100) or the second shell (200) is provided with a mounting surface (170), and the heating comb teeth (321) are arranged on the mounting surface (170).

10. The foldable heating comb according to claim 9, characterized in that: The mounting surface (170) is provided with a plurality of first comb teeth (330) on both sides of the heating comb teeth (321); the mounting surface (170) is provided with a plurality of second comb teeth (340) on the periphery of the heating comb teeth (321); some of the second comb teeth (340) are located between two adjacent first comb teeth (330); and the tops of the plurality of first comb teeth (330) are all provided with spherical ends (331), and the spherical ends (331) are higher than the tops of the first comb teeth (330) and the heating comb teeth (321).

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