Shaft connecting structure and hair style device

Abstract

The utility model discloses a shaft connecting structure and a hair styler, and relates to the field of hair care equipment, the shaft connecting structure comprises two arms, a shaft and a shaft limiting mechanism; one ends of the two arms are respectively provided with a shaft hole, and a shaft penetrates through the shaft holes so as to hinge the two arms; the other ends of the two arms can rotate around the shaft so as to realize opening and closing between the two arms; a first limiting part is arranged on the peripheral wall of the shaft; the shaft limiting mechanism is connected with one of the two arms and comprises a second limiting part; and the first limiting part and the second limiting part are embedded so as to limit the axial movement of the shaft. The hair styler comprises a shaft connection structure. According to the technical scheme, the first limiting part is arranged on the peripheral wall of the shaft, the second limiting part is arranged on the shaft limiting mechanism connected with the arm, axial movement of the shaft can be limited through mutual embedding of the first limiting part and the second limiting part after assembly, and then the shaft can be prevented from being disengaged from the shaft hole; therefore, the connection stability of the hinged ends of the two arms is ensured.

Description

Technical Field

[0001] The present application relates to the field of hair care equipment, and in particular to a shaft connection structure and a hairstyling device. Background Art

[0002] A hair straightener is a small personal care appliance used to curl and straighten hair. It usually includes two arms, one end of which is hinged and the other end can be opened and closed. Hair is placed between the open and closed ends of the two arms for shaping. The hinged ends of the two arms are generally connected by a shaft. However, after long-term use of the hair straightener, the multiple opening and closing actions of the two arms can easily cause the shaft to move along its axial direction, thereby causing the shaft to disengage from the hinged ends of the two arms, resulting in failure of the hinge of the two arms. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a shaft connection structure and a hair dryer, which are used to solve the technical problem in the prior art that the shaft is easy to slip out of the shaft hole, resulting in failure of the hinge connection of the two connected arms.

[0004] In order to achieve at least one of the above purposes, the present application provides the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a shaft connection structure, comprising two arms, a shaft and a shaft limiting mechanism;

[0006] One end of the two arms is respectively provided with an axis hole, and the axis passes through the axis holes on the two arms to realize the hinge connection between the two arms;

[0007] The other ends of the two arms can rotate around the axis to achieve opening and closing between the two arms;

[0008] A first limiting portion is provided on the outer peripheral wall of the shaft;

[0009] The shaft limiting mechanism is connected to one of the two arms, and the shaft limiting mechanism includes a second limiting portion;

[0010] The first limiting portion is engaged with the second limiting portion to limit the axial movement of the shaft.

[0011] In some embodiments, one of the first limiting portion and the second limiting portion is configured as a protrusion, and the other of the first limiting portion and the second limiting portion is configured as a groove, and the protrusion is accommodated in the groove;

[0012] When the protrusion is accommodated in the groove, it does not interfere with the opening and closing action between the two arms.

[0013] In some embodiments, in the axial direction of the shaft, the size of the groove matches the size of the protrusion.

[0014] In some embodiments, the first limiting portion is a groove, the second limiting portion is a protrusion, and a side of the protrusion accommodated in the groove is provided with an avoidance opening.

[0015] In some embodiments, the groove is an annular groove, the avoidance opening is an arc-shaped opening, and the arc-shaped opening is coaxially arranged with the annular groove.

[0016] In some embodiments, the shaft limiting mechanism further comprises a connecting portion, the connecting portion is fixedly connected to the second limiting portion, and the connecting portion is also detachably connected to one of the two arms;

[0017] After the shaft passes through the shaft holes on the two arms, the connecting portion is connected to the corresponding arm so that the first limiting portion is embedded in the second limiting portion.

[0018] In the above technical solution, a first limiting portion is provided on the outer peripheral wall of the shaft, and a second limiting portion is provided on the shaft limiting mechanism connected to the arm. After assembly, the first limiting portion and the second limiting portion are engaged with each other, so as to limit the axial movement of the shaft, thereby preventing the shaft from falling out of the shaft hole, so as to ensure the connection stability of the hinged ends of the two arms.

[0019] In a second aspect, an embodiment of the present application provides a hairstyling tool comprising the shaft connection structure of any one of the first aspects.

[0020] In some embodiments, the hair styling iron further comprises an elastic member disposed between the two arms for urging the two arms to open.

[0021] In some embodiments, the hair styler further comprises an angle limiting mechanism, and the angle limiting mechanism comprises a column and a limiting shell;

[0022] One end of the column is connected to an arm, and the other end is provided with a first clamping portion;

[0023] One end of the limiting housing is connected to the other arm, and the other end is provided with a second clamping portion;

[0024] The column is inserted into the limiting housing, and the column and the limiting housing can move relative to each other as the two arms open and close;

[0025] Wherein, the two arms can be opened under the drive of the elastic member until the first clamping portion abuts against the second clamping portion.

[0026] In some embodiments, the hair styler further comprises a locking mechanism, the locking mechanism comprising a locking portion and a fixing portion;

[0027] The locking part is arranged on one arm, and the locking part can be switched between a first position and a second position on the corresponding arm, and the locking part includes a latch;

[0028] The fixing portion is disposed on the other arm, and the fixing portion includes a slot;

[0029] When the two arms are in a closed state and the locking portion is in the first position, the latch can be inserted into the slot so that the two arms can be locked in the closed state;

[0030] When the locking portion is in the second position, the latch is located outside the slot.

[0031] In the above technical solution, the hairdresser adopts an axial connection structure, which can axially limit the axis connected between the two arms, thereby ensuring the connection stability of the hinged ends of the two arms in the hairdresser and the structural stability of the entire hairdresser. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 A schematic diagram of a three-dimensional structure of a shaft connection structure provided in some embodiments of the present application;

[0034] Figure 2 An exploded view of a shaft connection structure provided in some embodiments of the present application;

[0035] Figure 3 A schematic diagram of a cross-sectional structure of a first arm provided in some embodiments of the present application;

[0036] Figure 4 A schematic diagram of a portion of the structure of some embodiments of the present application in which the cover plate and the second outer shell are separated;

[0037] Figure 5 A schematic diagram of a three-dimensional structure of a shaft provided in some embodiments of the present application;

[0038] Figure 6 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application;

[0039] Figure 7 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application after the shaft limiting mechanism (cover plate) is removed;

[0040] Figure 8 for Figure 7 A magnified schematic diagram of the local structure;

[0041] Fig. 9 A schematic diagram of the three-dimensional structure of a hair dryer provided in some embodiments of the present application.

[0042] The reference numerals are as follows:

[0043] 1. first arm, 11. first outer shell, 111. positioning column, 12. first inner shell, 13. shaft hole;

[0044] 2. second arm, 21. second outer shell, 211. positioning groove, 212. sliding cavity, 213. card slot, 22. second inner shell;

[0045] 3. shaft, 31. first limiting portion;

[0046] 4. shaft limiting mechanism, 41. second limiting portion, 411. avoidance opening, 42. connecting portion;

[0047] 5. Elastic parts;

[0048] 6. Angle limiting mechanism, 61. Column, 611. First clamping portion, 62. Limiting housing, 621. Second clamping portion;

[0049] 7. Locking mechanism, 71. Locking part, 711. First body, 712. Dial block, 713. Elastic rod, 714. Block, 715. Latch, 72. Fixing part, 721. Second body, 722. Slot;

[0050] 8. A first heating unit;

[0051] 9. The second heating unit;

[0052] 10. Main structure. DETAILED DESCRIPTION

[0053] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0054] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0055] The "embodiment" mentioned in this application means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0056] The special word "exemplary" mentioned in this application means "used as an example, embodiment or illustrative". Any embodiment described as "exemplary" is not necessarily interpreted as being superior or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0057] In the description of this application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0058] In the description of this application, the technical term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0059] In the description of the present application, the orientations or positional relationships indicated by technical terms such as "upper", "lower", "inside", "outside", "front", "back", "left", "right", "top", and "bottom" are orientations or positional relationships based on the working state of the present application. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0060] In the description of this application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] In the description of the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] In the description of the present application, “plurality” means two or more (including two), unless otherwise clearly and specifically defined.

[0063] In the description of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0064] As part of the creative concept of the present application, before describing the embodiments of the present application, it is necessary to analyze the reasons why the shaft in the hair dryer is easily dislocated from the shaft hole in the related art, resulting in the hinge failure of the two connected arms, and obtain the technical solution of the embodiments of the present application through reasonable analysis.

[0065] In the related art, the development of hairdressing tools has experienced an evolution from primitive tools to metal tools, electric tools, and then to modern and environmentally friendly tools. With the advancement and innovation of science and technology, especially the invention of generators, electric hairdressing tools have begun to rise. These electric tools make trimming and styling hair more convenient and quick. Tools such as hair dryers, curling irons, and hair straighteners have become essential hairdressing tools for people. They can not only better meet people's needs for hair styling, but also be safer and more convenient. Hair straighteners are also called hair straighteners or electric plywood or plywood. The core technology is to heat the heating element through electric current, and then conduct the heat to the aluminum plate or ceramic plate to make it heat up. When the hair passes through these heated plates, it will be heated and softened, and then the effect of the hairstyle will be fixed by cooling. At present, the hair straightener usually includes two arms, one end of the two arms is hinged and the other end can be opened and closed. The hair is placed between the open and closed ends of the two arms for shaping. The hinged ends of the two arms are generally connected by a shaft. However, after the hair dryer is used for a long time, the two arms open and close many times, which easily causes the shaft to move along its axial direction, thereby causing the shaft to disengage from the hinged ends of the two arms, resulting in failure of the hinge of the two arms.

[0066] To this end, the present application provides a hairdressing iron with a shaft connection structure, which includes a first limiting portion and a second limiting portion. The first limiting portion is arranged on the outer peripheral wall of the shaft, and the second limiting portion is connected to one of the arms. The first limiting portion and the second limiting portion are engaged with each other to limit the axial movement of the shaft, thereby solving the technical problem in the prior art that the shaft in the hairdressing iron is easily disengaged from the shaft hole, resulting in failure of the hinge connection of the two connected arms.

[0067] The technical solutions of the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. The technical features involved in the different implementation modes of the present application described below can be combined with each other as long as there is no conflict between them.

[0068] For reference Figures 1 to 3 and Figure 5 , Figure 1 A schematic diagram of a three-dimensional structure of a shaft connection structure provided in some embodiments of the present application; Figure 2 An exploded view of a shaft connection structure provided in some embodiments of the present application; Figure 3 A schematic diagram of a cross-sectional structure of a first arm provided in some embodiments of the present application, Figure 3 A shaft hole is shown; Figure 5 This is a schematic diagram of the three-dimensional structure of the shaft provided in some embodiments of the present application. Figure 5 A first stop on the shaft is shown.

[0069] In an embodiment of the present application, a shaft connection structure is provided, such as Figures 1 to 3 As shown, the shaft connection structure includes two arms, a shaft 3 and a shaft limiting mechanism 4.

[0070] In this embodiment, one end of the two arms is respectively provided with an axial hole 13, and the axis 3 passes through the axial holes 13 on the two arms, so that one end of the two arms can be hinged together; the other ends of the two arms can rotate around the axis 3 to achieve the opening and closing of the two arms, and the opening and closing ends of the two arms can clamp the hair to shape the hair.

[0071] In this embodiment, a first limiting portion 31 is provided on the outer peripheral wall of the shaft 3. Figure 5 As shown; the shaft limiting mechanism 4 is connected to one of the two arms, and the shaft limiting mechanism 4 includes a second limiting portion 41; the first limiting portion 31 and the second limiting portion 41 are engaged with each other, so that the shaft 3 and the arm can be relatively fixed in the axial direction of the shaft 3, thereby limiting the axial movement of the shaft 3 relative to the arm.

[0072] In this embodiment, a first limiting portion 31 is provided on the outer peripheral wall of the shaft 3, and a second limiting portion 41 is provided on the shaft limiting mechanism 4 connected to the arm. After assembly, the first limiting portion 31 and the second limiting portion 41 are engaged with each other, so as to limit the axial movement of the shaft 3, thereby preventing the shaft 3 from escaping from the shaft hole 13, so as to ensure the connection stability of the hinged ends of the two arms.

[0073] For reference Figure 2 , Figure 4 , Figure 5 , Figure 2 An exploded view of a shaft connection structure provided in some embodiments of the present application; Figure 4 This is a partial structural diagram of some embodiments of the present application in which the cover plate and the second outer shell are separated. Figure 4 A second limiting portion is shown; Figure 5 This is a schematic diagram of the three-dimensional structure of the shaft provided in some embodiments of the present application. Figure 5 A first stop on the shaft is shown.

[0074] In some embodiments, one of the first limiting portion 31 and the second limiting portion 41 is configured as a protrusion, and the other of the first limiting portion 31 and the second limiting portion 41 is configured as a groove, and the protrusion is accommodated in the groove; wherein, the fit of the protrusion placed in the groove can be understood as interlocking.

[0075] Exemplarily, a specific structure of the first limiting portion 31 and the second limiting portion 41 may be: the first limiting portion 31 is a protrusion, which is protrudingly arranged on the outer peripheral wall of the shaft 3, and the protrusion and the shaft 3 may be made in one piece or be detachably connected; it should be understood that when the protrusion is made in one piece with the shaft 3, the position of the protrusion on the shaft 3 will not affect the shaft hole 13 on the arm through which the shaft 3 is passed. The second limiting portion 41 is a groove, and the protrusion can be accommodated in the groove after assembly. The groove can provide a certain activity space for the protrusion placed therein, that is, when the two arms are opening and closing, if the shaft 3 needs to rotate, the activity space in the groove can allow the protrusion to rotate with the shaft 3, so as to ensure that the opening and closing action between the two arms is not restricted by the cooperation of the protrusion and the groove, but the activity space limits the movement of the protrusion in the axial direction of the shaft 3, thereby limiting the axial movement of the shaft 3.

[0076] For example, Figure 2 , Figure 4 , Figure 5 As shown, another specific structure of the first limiting portion 31 and the second limiting portion 41 can be: the first limiting portion 31 is a groove, which is formed by being recessed on the outer peripheral wall of the shaft 3 toward the axial direction of the shaft 3. The second limiting portion 41 is a protrusion, and it should be understood that during assembly, the protrusion can be placed in the groove after the shaft 3 is penetrated through the shaft hole 13 on the arm, so as to avoid the protrusion affecting the operation of the shaft 3 penetrating the shaft hole 13 after being placed in the groove; after assembly, the protrusion can be accommodated in the groove, and the groove can provide a certain activity space for the protrusion placed therein, that is, when the two arms are opened and closed, if the shaft 3 needs to rotate, the activity space in the groove can allow the protrusion to rotate with the shaft 3, so as to ensure that the opening and closing action between the two arms is not restricted by the cooperation of the protrusion and the groove, but the activity space limits the movement of the protrusion in the axial direction of the shaft 3, thereby limiting the axial movement of the shaft 3.

[0077] Furthermore, in the axial direction of the shaft 3, the size of the groove matches the size of the protrusion. With the above structural design, when the protrusion is assembled into the groove, the axial movement of the shaft 3 can be well limited by the size matching of the groove and the protrusion in the axial direction of the shaft 3; if in the axial direction of the shaft 3, the size of the groove and the protrusion do not match or the difference between the two is large, the shaft 3 may move in the axial direction. Although the shaft 3 will not be separated from the shaft hole 13 under the restriction of the matching of the groove and the protrusion, the stability of the entire shaft connection structure will be affected.

[0078] Further, when the first limiting portion 31 is a groove and the second limiting portion 41 is a protrusion, the groove can be an annular groove formed on the outer peripheral wall of the shaft 3; optionally, the annular groove is coaxially arranged with the shaft 3. A side of the protrusion accommodated in the groove can also be provided with an avoidance opening 411; optionally, the avoidance opening 411 is an arc-shaped opening, and the arc-shaped opening is coaxially arranged with the annular groove. Among them, the groove is designed to be annular, and after the protrusion is placed in the groove, the protrusion can move in the annular groove with the rotation of the shaft 3, and will not interfere with the rotation of the shaft 3, and thus will not interfere with the opening and closing action between the two arms; the advantages of the design of the avoidance opening 411 are: first, there will be no interference between the protrusion and the shaft 3, and second, more parts of the protrusion can be allowed to enter the groove, so that more parts of the protrusion and the groove are in contact, so that the protrusion and the groove have a better matching relationship, and the axial restriction effect on the shaft 3 is improved.

[0079] In this embodiment, the cooperation between the first limiting portion 31 and the second limiting portion 41 is designed as a protrusion and a groove interlocking structure, which has the characteristics of simple structure, convenient disassembly and assembly, and easy processing. Moreover, compared with the existing production line, the modification is small, which can reduce the production cost.

[0080] For reference Figure 2 , Figures 4 to 6 , Figure 2 An exploded view of a shaft connection structure provided in some embodiments of the present application; Figure 4 A schematic diagram of a portion of the structure of a cover plate (connecting portion) provided in some embodiments of the present application in a state where the cover plate (connecting portion) is separated from the second outer shell; Figure 5 This is a schematic diagram of the three-dimensional structure of the shaft provided in some embodiments of the present application. Figure 5 A first stopper on the shaft is shown; Figure 6 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application.

[0081] In some embodiments, Figure 2 As shown, the shaft limiting mechanism 4 also includes a connecting portion 42, which is fixedly connected to the second limiting portion 41, and the connecting portion 42 is also detachably connected to one of the two arms, wherein the detachable connection can be a snap-fit ​​or a bolt connection or a combination of the two; when the shaft 3 passes through the shaft holes 13 on the two arms, the connecting portion 42 is connected to the corresponding arm, and after assembly, the first limiting portion 31 can be just fit with the second limiting portion 41.

[0082] For example, Figure 2 , Figures 4 to 6As shown, in the case where the first limiting portion 31 is a groove and the second limiting portion 41 is a protrusion, a groove is formed on the shaft 3 and a protrusion is fixed on the connecting portion 42; during assembly, the shaft 3 is first passed through the shaft holes 13 on the two arms, and then the connecting portion 42 is assembled to the corresponding arm, wherein when the connecting portion 42 is assembled with the corresponding arm, it is necessary to ensure that the protrusion can be exactly placed in the groove, and when the connecting portion 42 is fixed with the corresponding arm, the protrusion and the groove are also fitted with each other, so that the shaft 3 and the two arms are relatively fixed in the axial direction, thereby limiting the axial movement of the shaft 3.

[0083] In this embodiment, the shaft limiting mechanism 4 and the arm are detachably connected through the connecting portion 42, so that the shaft 3 and the two arms can be assembled and then the first limiting portion 31 and the second limiting portion 41 can be matched and connected. This structural design has the characteristics of simple structure and easy assembly.

[0084] For reference Figure 1 and Fig. 9 , Figure 1 A schematic diagram of a three-dimensional structure of a shaft connection structure provided in some embodiments of the present application; Fig. 9 A schematic diagram of the three-dimensional structure of a hair dryer provided in some embodiments of the present application.

[0085] An embodiment of the present application also provides a hairstyling tool, comprising any one or more shaft connection structures in the above embodiments.

[0086] For example, Figure 1 and Fig. 9As shown, a specific structure of the hairdresser may be: the hairdresser includes two arms, a shaft 3, two heating units and a main structure 10 (main body), the two arms are respectively a first arm 1 and a second arm 2, the two heating units are respectively a first heating unit 8 and a second heating unit 9, the first arm 1 includes a first outer shell 11 and a first inner shell 12, and the second arm 2 includes a second outer shell 21, a second inner shell 22 and a cover plate. The first inner shell 12 and the first outer shell 11 are assembled to form the first arm 1, and the first heating unit 8 is installed on the first inner shell 12. The second outer shell 21, the second inner shell 22 and the cover plate are assembled to form the second arm 2, and the second heating unit 9 is installed on the second inner shell 22. The cover plate is used as a connecting portion 42 and is fixed with a protrusion, and the cover plate can be connected to the second outer shell 21 in a snap-fit ​​manner. A groove is provided on the outer peripheral wall of the shaft 3, and an axial hole 13 is provided on both the first outer shell 11 and the second outer shell 21, and the axial holes 13 on both can be penetrated by the shaft 3, so that one end of the first arm 1 and the second arm 2 can be hinged by the shaft 3, and the other end can be opened and closed; during assembly, the shaft 3 must first be penetrated through the axial holes 13 on the two arms, and then the cover plate is buckled on the second outer shell 21 to place the protrusion in the groove on the shaft 3, thereby limiting the axial movement of the shaft 3. After the first arm 1 and the second arm 2 are assembled, the two heating units can be relatively arranged at the opening and closing ends of the two arms for shaping hair. The main structure 10 is connected to the first arm 1, and the two are detachably connected, wherein the detachable connection can be plug-in or bolted or a combination of the two.

[0087] This embodiment adopts an axis connection structure in the hairdresser, which can axially limit the axis 3 connected between the two arms, thereby ensuring the connection stability of the hinged ends of the two arms in the hairdresser and the structural stability of the entire hairdresser.

[0088] For reference Figure 2 , Figure 6 and Figure 7 , Figure 2 An exploded view of a shaft connection structure provided in some embodiments of the present application; Figure 6 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application; Figure 7 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application after the shaft limiting mechanism (cover plate) is removed.

[0089] In some embodiments, the hair styling iron further comprises an elastic member 5, which is disposed between the two arms to drive the two arms to open.

[0090] For example, Figure 2 , Figure 6 and Figure 7As shown, a specific structure of the elastic member 5 can be: the elastic member 5 can be a compression spring, which is arranged between the opposite surfaces of the two arms, and is arranged close to the hinged ends of the two arms; specifically, a positioning column 111 is arranged on one arm, and a positioning groove 211 arranged opposite to the positioning column 111 is arranged on the other arm, one end of the compression spring is sleeved on the positioning column 111, and the other end is inserted into the positioning groove 211. In a natural state, the compression spring can extend to both ends to drive the two arms to rotate around the axis 3 and make the two arms in an open state.

[0091] It should be noted that, in the prior art, in order to realize the opening and closing action of the two arms, the hair dryer generally adopts a retaining spring or a torsion spring mounted on the shaft 3 at the hinged end of the two arms. The two ends of the retaining spring or the torsion spring act on the two arms to drive the two arms to open. However, the space at the hinged end of the two arms is limited, and the retaining spring or the torsion spring is installed on the shaft 3 at the hinged end. Moreover, the retaining spring or the torsion spring needs to have a certain pre-tightening force during installation, which makes the assembly of the retaining spring or the torsion spring difficult.

[0092] This embodiment adopts the method of setting the elastic member 5 between the two arms to replace the original retaining spring or torsion spring, which can drive the two arms to open, and can use the positioning column 111 and the positioning groove 211 to cooperate with the assembly of the elastic member 5, thereby reducing the difficulty of assembly, improving the assembly efficiency and significantly reducing the production cost.

[0093] For reference Figure 1 , Figure 2 , Figure 6 and Figure 7 , Figure 1 A schematic diagram of a three-dimensional structure of a shaft connection structure provided in some embodiments of the present application; Figure 2 An exploded view of a shaft connection structure provided in some embodiments of the present application; Figure 6 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application; Figure 7 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application after the shaft limiting mechanism (cover plate) is removed.

[0094] In some embodiments, the hairstyling iron further comprises an angle limiting mechanism 6, which is mainly used to control the maximum opening and closing angle between the two arms.

[0095] For example, Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, a specific structure of the angle limiting mechanism 6 may be: the angle limiting mechanism 6 includes a column 61 and a limiting shell 62; one end of the column 61 is connected to an arm, and the other end is provided with a first clamping portion 611, and the first clamping portion 611 may be an outer flange protruding toward the outside of the column 61; one end of the limiting shell 62 is connected to the other arm, and the other end is provided with a second clamping portion 621, and the second clamping portion 621 may be an inner flange protruding toward the inside of the limiting shell 62; the limiting shell 62 has an inner cavity and a hole, and the column 61 can be passed through the hole to be arranged on The limiting shell 62, and part of the structure of the column 61 can be accommodated in the inner cavity of the limiting shell 62, and the column 61 and the limiting shell 62 can move relative to each other as the two arms open and close; wherein, the two arms can be opened under the drive of the elastic member 5 until the first clamping portion 611 abuts against the second clamping portion 621, that is, the relative movement of the column 61 and the limiting shell 62 can be limited by the mutual abutment of the inner flange and the outer flange, and because the column 61 and the limiting shell 62 are respectively connected to the two arms, the maximum opening and closing angle between the two arms can be limited.

[0096] In this embodiment, the maximum opening and closing angle between the two arms is limited by the angle limiting mechanism 6. If the opening and closing angle between the two arms is too large, it will be inconvenient to operate and affect the use of the hair dryer. It may also cause excessive stretching of the elastic member 5, affecting the service life of the elastic member 5 or making it easy for the elastic member 5 to escape from between the two arms. In addition, the cooperation between the column 61 and the limiting shell 62 in the angle limiting mechanism 6 can also guide the opening and closing between the two arms, so that the two arms will not have a large deviation during the opening and closing process, which is conducive to the accurate docking between the first heating unit 8 and the second heating unit 9, which can improve the use effect of the product and reduce the probability of axial deviation of the shaft 3.

[0097] For reference Figures 1 to 3 as well as Figures 6 to 8 , Figure 1 A schematic diagram of a three-dimensional structure of a shaft connection structure provided in some embodiments of the present application; Figure 2 An exploded view of a shaft connection structure provided in some embodiments of the present application; Figure 3 A schematic diagram of a cross-sectional structure of a first arm provided in some embodiments of the present application; Figure 6 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application; Figure 7 A schematic diagram of the internal structure of the shaft connection structure provided in some embodiments of the present application after the shaft limiting mechanism (cover plate) is removed; Figure 8 for Figure 7 A magnified schematic diagram of the local structure.

[0098] In some embodiments, the hair dryer further comprises a locking mechanism 7, which is mainly used to lock the two arms in a closed state.

[0099] For example, Figures 1 to 3 as well as Figures 6 to 8 As shown, a specific structure of the locking mechanism 7 can be: the locking mechanism 7 can be arranged between the opposite surfaces of the two arms, and the locking mechanism 7 is arranged near the opening and closing ends of the two arms, and the locking mechanism 7 includes a locking portion 71 and a fixing portion 72. The locking portion 71 is arranged on one arm, and the locking portion 71 can switch between the first position and the second position on the corresponding arm; the locking portion 71 includes a first body 711 and a shift block 712, an elastic rod 713 and a latch 715 connected to the first body 711; a sliding cavity 212 is provided on the corresponding arm, and the first body 711 can slide in one direction in the sliding cavity 212; the shift block 712 is arranged protruding from the outside of the corresponding arm, and a through hole is provided on the corresponding arm, and the shift block 712 can move in the through hole to drive the first body 711 to move in the sliding cavity 212; one end of the elastic rod 713 is connected to the first body 711, and the other end is provided with a clamping block 714, and two clamping grooves 213 are also provided in the sliding cavity 212, and the two clamping grooves 213 are arranged along The first body 711 is distributed in the sliding direction in the sliding cavity 212, and the elastic rod 713 is placed in the sliding cavity 212. The block 714 can switch between the two slots 213 during the sliding process of the first body 711. When the block 714 is in the first slot 213, the locking portion 71 is in the first position and is locked in the first position. The first body 711 and the elastic rod 713 can be driven to move by the shift block 712, so that the block 714 can overcome the pressure of the elastic rod 713 and move out of the first slot 213. The shift block 712 can also be operated to move the block 714 to the second slot 213. The block 714 is in the second slot 213 under the pressure of the elastic rod 713. At this time, the locking portion 71 is in the second position and is locked in the second position. The fixing portion 72 is arranged on the other arm, and the fixing portion 72 includes a second body 721 and a slot 722 formed on the second body 721. When the two arms are in a closed state and the locking portion 71 is in a first position, the latch 715 can be inserted into the slot 722 so that the two arms can be locked in a closed state; when the locking portion 71 is in a second position, the latch 715 is placed outside the slot 722, and the two arms will not be locked in a closed state.

[0100] In this embodiment, the locking mechanism 7 is provided to lock the two arms in a closed state. There are two situations when the two arms are in the closed state. One is that when the hair styling device is used to style hair, the two arms are closed and the hair is clamped by the heating unit. At this time, the two arms are locked in the closed state, so that the distance between the two arms will not change, and the hair can be heated more evenly. The other is that when the hair styling device is not used, the two arms are locked in the closed state, so that the volume of the hair styling device is kept small, which is convenient for storage and transportation. In addition, the hair styling device with the two arms in the closed state will also reduce the dust accumulation on the opposite surfaces of the two arms.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A shaft connection structure, characterized in that: It includes two arms, a shaft and a shaft limiting mechanism; One end of the two arms is respectively provided with an axis hole, and the axis passes through the axis holes on the two arms to realize the hinge connection between the two arms; The other ends of the two arms can rotate around the axis to achieve opening and closing of the two arms; A first limiting portion is provided on the outer peripheral wall of the shaft; The shaft limiting mechanism is connected to one of the two arms, and the shaft limiting mechanism includes a second limiting portion; The first limiting portion is engaged with the second limiting portion to limit the axial movement of the shaft.

2. The shaft connection structure according to claim 1, characterized in that: One of the first limiting portion and the second limiting portion is configured as a protrusion, and the other of the first limiting portion and the second limiting portion is configured as a groove, and the protrusion is accommodated in the groove; When the protrusion is accommodated in the groove, it does not interfere with the opening and closing movement between the two arms.

3. The shaft connection structure according to claim 2, characterized in that: In the axial direction of the shaft, the size of the groove matches the size of the protrusion.

4. The shaft connection structure according to claim 2, characterized in that: The first limiting portion is a groove, the second limiting portion is a protrusion, and a side of the protrusion accommodated in the groove is provided with an escape opening.

5. The shaft connection structure according to claim 4, characterized in that: The groove is an annular groove, the avoidance opening is an arc-shaped opening, and the arc-shaped opening is coaxially arranged with the annular groove.

6. The shaft connection structure according to claim 1, characterized in that: The shaft limiting mechanism further comprises a connecting portion, the connecting portion is fixedly connected to the second limiting portion, and the connecting portion is also detachably connected to one of the two arms; After the shaft passes through the shaft holes on the two arms, the connecting portion is connected to the corresponding arm so that the first limiting portion is embedded in the second limiting portion.

7. A hairstyling iron, comprising the shaft connection structure according to any one of claims 1 to 6.

8. The hair styling iron according to claim 7, characterized in that: The invention also comprises an elastic member, which is arranged between the two arms and used for driving the two arms to open.

9. The hair styling iron according to claim 8, characterized in that: It also includes an angle limiting mechanism, which includes a column and a limiting shell; One end of the column is connected to one of the arms, and the other end is provided with a first clamping portion; One end of the limit housing is connected to the other arm, and the other end is provided with a second clamping portion; The column is disposed in the limit housing, and the column and the limit housing can move relative to each other as the two arms open and close; Wherein, the two arms can be opened under the drive of the elastic member until the first clamping portion abuts against the second clamping portion.

10. The hair styling iron according to claim 7, characterized in that: Also included is a locking mechanism, the locking mechanism comprising a locking portion and a fixing portion; The locking part is arranged on one of the arms, and the locking part can be switched between a first position and a second position on the corresponding arm, and the locking part includes a latch; The fixing portion is disposed on the other arm, and the fixing portion includes a slot; When the two arms are in a closed state and the locking portion is in a first position, the latch can be inserted into the slot so that the two arms can be locked in a closed state; When the locking portion is in the second position, the latch is located outside the slot.

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