Electric connection structure, handheld appliance, accessory and hairdressing tool

Abstract

The utility model provides an electric connection structure, a handheld appliance, an accessory and a hairdressing tool, and relates to the technical field of electric connection. The electric connection structure comprises a first connection structure, the first connection structure comprises a first base body and a first conductive contact part arranged in the first base body, and the top end part of the first conductive contact part protrudes out of the surface of the first base body; the second connecting structure comprises a second base body and a second conductive contact part arranged in the second base body; when the first connecting structure and the second connecting structure are connected in a matched mode, the first conductive contact part makes contact with the second conductive contact part, and the protruding height of the first conductive contact part is configured to maintain contact between the first conductive contact part and the second conductive contact part when the first connecting structure and the second connecting structure generate relative displacement. The complexity of the electric connection structure is simplified, the manufacturing cost is reduced, and the electric connection stability and safety are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of electrical connection technology, and in particular to an electrical connection structure, handheld device, accessory and hair styling tool. Background Technology

[0002] Electrical connections are present in various detachable electrical devices, such as hair styling tools, power tools, and electronic devices. In addition to mechanical connections, the main unit and its accessories also include electrical connections. The reliability of these electrical connections directly affects product performance and user experience. Traditional electrical connections typically use direct contact between conductive pins. However, in actual use, factors such as mechanical vibration, insertion / removal shaking, or rotational displacement can cause slight misalignment of the contact area between the conductive pins, leading to poor contact and power outages. For example, in hair styling tools like curling irons and hair dryers, the handle and heating element require frequent insertion / removal or rotational adjustments. Traditional electrical connections often suffer from unstable contact due to dynamic displacement, affecting heating efficiency or posing safety hazards. Therefore, providing an electrical connection structure that maintains a stable connection is a pressing technical problem that needs to be solved.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] This application provides an electrical connection structure, a handheld device, an accessory, and a hair styling tool, which at least to some extent overcomes the problem of poor electrical connection stability in related technologies.

[0005] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0006] According to one aspect of this application, an electrical connection structure, a handheld device, an accessory, and a hair styling tool are provided, comprising: a first connection structure including a first base and a first conductive contact portion disposed within the first base, the top portion of the first conductive contact portion protruding from the surface of the first base; and a second connection structure including a second base and a second conductive contact portion disposed within the second base; when the first connection structure and the second connection structure are connected, the first conductive contact portion contacts the second conductive contact portion, and the protrusion height of the first conductive contact portion is configured to maintain contact between the first conductive contact portion and the second conductive contact portion when the first connection structure and the second connection structure undergo relative displacement.

[0007] In some embodiments, the protrusion height of the first conductive contact is 0.03-0.1 mm.

[0008] In some embodiments, the protrusion height of the first conductive contact is 0.05-0.08 mm.

[0009] In some embodiments, the second conductive contact portion is an elastic contact pin, which contains an elastic support member and a conductive pin. The elastic support member is used to elastically support the conductive pin, and the conductive pin forms an elastic contact with the first conductive contact portion.

[0010] In some embodiments, the contactable area of ​​the top portion of the first conductive contact is greater than the contactable area of ​​the top portion of the second conductive contact.

[0011] In some embodiments, the first substrate and / or the second substrate are injection-molded plastic parts, and the first conductive contact and / or the second conductive contact are fixed to the first substrate and / or the second substrate by insert injection molding.

[0012] In some embodiments, when the first connecting structure and the second connecting structure are in the electrically connected position, the first connecting structure and the second connecting structure are in a locked state, and the electrically connected position is the position when the first connecting structure and the second connecting structure are electrically connected.

[0013] According to another aspect of this application, a handheld device is also provided, including a second connecting structure, the second connecting structure including a second base and a second conductive contact disposed in the second base; the handheld device is used to electrically connect with a first connecting structure, the first connecting structure including a first base and a first conductive contact disposed in the first base, the top portion of the first conductive contact protruding from the surface of the first base; when the first connecting structure and the second connecting structure are connected, the first conductive contact contacts the second conductive contact, and the protrusion height of the first conductive contact is configured to maintain the contact between the first conductive contact and the second conductive contact when the first connecting structure and the second connecting structure undergo relative displacement.

[0014] According to another aspect of this application, an accessory is also provided, including a first connecting structure, the first connecting structure including a first base and a first conductive contact portion disposed within the first base, the top portion of the first conductive contact portion protruding from the surface of the first base; the accessory is used for electrical connection with a second connecting structure, the second connecting structure including a second base and a second conductive contact portion disposed within the second base; when the first connecting structure and the second connecting structure are connected, the first conductive contact portion contacts the second conductive contact portion, and the protrusion height of the first conductive contact portion is configured to maintain the contact between the first conductive contact portion and the second conductive contact portion when the first connecting structure and the second connecting structure undergo relative displacement.

[0015] According to another aspect of this application, a hair styling tool is also provided, including a handle and an accessory. The accessory includes a first connecting structure, and the handle includes a second connecting structure. The first connecting structure includes a first base and a first conductive contact portion disposed within the first base, with the top portion of the first conductive contact portion protruding from the surface of the first base. The second connecting structure includes a second base and a second conductive contact portion disposed within the second base. When the handle and the accessory are connected, the first conductive contact portion contacts the second conductive contact portion, and the protrusion height of the first conductive contact portion is configured to maintain contact between the first conductive contact portion and the second conductive contact portion when the first connecting structure and the second connecting structure undergo relative displacement.

[0016] The electrical connection structure, handheld device, accessory, and hair styling tool provided in the embodiments of this application, by designing the top end of the first conductive contact portion to protrude from the surface of the first substrate and configuring its protrusion height, ensures that when the first connection structure and the second connection structure undergo relative displacement, such as offset, rotation, or vibration, the protruding portion can maintain continuous contact with the second conductive contact portion, avoiding contact breakage due to minor displacement and significantly improving the anti-interference capability of the electrical connection. The embodiments of this application achieve displacement compensation solely through the protrusion height design of the first conductive contact portion, simplifying the mechanical complexity of the connection structure, reducing manufacturing costs, and expanding the effective contact possibilities between the first and second conductive contacts. Even under alignment deviations caused by assembly tolerances or long-term wear, reliable contact of the conductive connection structure can still be ensured.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 This diagram illustrates an electrical connection structure according to an embodiment of this application.

[0020] Figure 2 This illustration shows a structural schematic diagram of a second conductive contact portion according to an embodiment of this application;

[0021] Figure 3 This illustration shows a structural diagram of the connection between a handheld device and an accessory in an embodiment of this application;

[0022] Figure 4An exploded view of the connection structure between a handheld device and its accessories, as shown in an embodiment of this application, is displayed.

[0023] Figure 5 This diagram illustrates a connection structure for a hair styling tool according to an embodiment of this application. Detailed Implementation

[0024] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0026] Furthermore, it should be understood that in the description of this application, terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Positional relationships such as "upstream" and "downstream" are based on the positional relationships during normal fluid flow.

[0027] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can 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. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0030] The specific implementation methods of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0031] Figure 1 A schematic diagram of the overall structure of the electrical connection structure 10 applicable to embodiments of this application is shown. For example... Figure 1 As shown, the electrical connection structure 10 includes a first connection structure 101 and a second connection structure 102, and the first connection structure 101 and the second connection structure 102 are electrically connected through mechanical cooperation.

[0032] Specifically, the first connection structure 101 consists of a first base 1011 and a first conductive contact portion 1012 embedded therein. The top portion of the first conductive contact portion 1012 (e.g. Figure 1 The raised area in the middle protrudes outward from the surface of the first substrate 1011 to form a contact point.

[0033] The second connection structure 102 consists of a second base 1021 and a second conductive contact portion 1022 embedded therein. The second conductive contact portion 1022 corresponds to the protruding portion of the first conductive contact portion 1012, ensuring that the two form electrical conductivity when connected.

[0034] When the first connecting structure 101 and the second connecting structure 102 are connected, the protruding tip of the first conductive contact 1012 directly abuts against the surface of the second conductive contact 1022 (e.g., an elastic contact surface or a needle-like contact). The protrusion height of the first conductive contact 1012 is configured to maintain contact between the first conductive contact 1012 and the second conductive contact 1022 when the first connecting structure 101 and the second connecting structure 102 undergo relative displacement. This specific design ensures that even if the first connecting structure 101 and the second connecting structure 102 undergo slight relative displacement during use due to vibration, insertion, or rotational adjustment, the first conductive contact 1012 can still maintain contact with the second conductive contact 1022, preventing unstable contact due to displacement and thus avoiding power failure of the electrical connection structure.

[0035] This embodiment of the application designs the top end of the first conductive contact portion to protrude from the surface of the first substrate and configures its protrusion height so that when the first connecting structure and the second connecting structure undergo relative displacement, such as offset, rotation, or vibration, the protruding portion can maintain continuous contact with the second conductive contact portion, avoiding contact breakage due to minor displacement and significantly improving the anti-interference capability of the electrical connection. This embodiment of the application can achieve displacement compensation simply by designing the protrusion height of the first conductive contact portion, simplifying the mechanical complexity of the connecting structure, reducing manufacturing costs, and expanding the effective contact possibility between the first conductive contact portion and the second conductive contact portion. Even under assembly tolerances or alignment deviations caused by long-term wear, reliable contact of the conductive connection structure can still be ensured.

[0036] In some embodiments of this application, the height by which the top end of the first conductive contact 1012 protrudes outward from the surface of the first substrate 1011 is configured to be 0.03-0.1 mm. This range was determined through experimental verification and mechanical simulation. If the protrusion height is less than 0.03 mm, the top end of the first conductive contact 1012 may not provide sufficient compensation margin during relative displacement, which may cause the contact interface to detach due to slight misalignment. If the protrusion height exceeds 0.1 mm, under frequent insertion / removal or vibration scenarios, the excessively large cantilever structure is prone to plastic deformation or fracture due to mechanical stress concentration, and may also increase wear on the contact surface. In some cases, the excessively high protrusion height prevents the two connection structures from being connected at their original mechanical height, resulting in unsightly and inconvenient operation.

[0037] In this embodiment, by limiting the protrusion height to the range of 0.03-0.1mm, the first conductive contact 1012 can maintain contact through geometric compensation during lateral displacement, while avoiding the risk of mechanical failure due to excessive height. Furthermore, this height range is compatible with the assembly tolerances of common handheld devices (such as curling irons and electric shavers), ensuring stability in mass production.

[0038] In some embodiments of this application, multiple electrical connection structures were selected as experimental samples for specific experimental verification and mechanical simulation. The height of the first conductive contact portion protruding from the surface of the first substrate within the first connection structure was set to 0.03 mm, 0.05 mm, 0.08 mm, and 0.1 mm, respectively. A control group was also set up, where the first conductive contact portion was flush with the surface of the first substrate. Under simulated usage conditions, multiple rotation and insertion / removal tests were performed on each sample, and the number of electrical connection breaks or poor contacts was recorded. The simulation results showed that the number of electrical connection breaks or poor contacts was significantly lower than that of the control group at different protrusion heights. In particular, the electrical connection stability was optimal when the protrusion height was in the range of 0.05-0.08 mm.

[0039] The height of the first conductive contact portion is 0.05-0.08 mm higher than the surface of the first substrate. This slight height difference ensures that the first conductive contact portion can maintain contact with the second conductive contact portion of the second connecting structure during rotation, insertion, and removal of the first connecting structure, avoiding power outages or poor contact caused by misalignment. The embodiments of this application effectively reduce the problem of unstable electrical connections caused by dynamic misalignment, thereby improving the reliability and safety of the product.

[0040] In some embodiments of this application, Figure 2 A cross-sectional schematic diagram of the elastic contact spring of the second conductive contact portion 1022 in an embodiment of this application is shown.

[0041] like Figure 2 As shown, the second conductive contact portion 1022 is an elastic contact spring. The top end of the second conductive contact portion 1022 can be flush with the surface of its second base 1021, or it can protrude from the surface of its second base 1021 by a certain height. The interior of the second conductive contact portion 1022 includes:

[0042] Conductive needle 1022a: Made of highly conductive metal material (such as copper alloy or gold-plated copper), with a spherical or flat contact head at the tip, used for direct contact with the protruding part of the first conductive contact 1012;

[0043] Elastic support 1022b: nested at the tail of conductive needle 1022a, it can be a helical spring, a spring sheet or a silicone elastomer, to provide axial elastic support for conductive needle 1022a.

[0044] When the first connecting structure 101 and the second connecting structure 102 are engaged, the protruding tip (such as a metal contact) of the first conductive contact portion 1012 presses against the conductive needle 1022a, forcing the conductive needle 1022a to compress the elastic support member 1022b axially. The reverse elastic force generated by the elastic support member 1022b keeps the conductive needle 1022a in close contact with the first conductive contact portion 1012, forming a dynamic elastic contact.

[0045] The elastic deformation of the elastic support 1022b can automatically compensate for the lateral or axial displacement between the first connecting structure 101 and the second connecting structure 102, preventing the electrical connection contact surface from detaching due to mechanical vibration or insertion / removal shaking. The contact pressure generated by the elastic contact is dynamically supplemented by the elastic support 1022b, preventing excessive contact pressure between the first connecting structure 101 and the second connecting structure 102, thereby preventing the protruding structure of the first conductive contact 1012 from wearing out too quickly. In addition, when the second conductive contact 1022 is an elastic contact spring, it can extend beyond the surface of the second base 1021 by a certain height, so that even if the first connecting structure 101 and the second connecting structure 102 experience slight relative displacement due to vibration, insertion / removal, or rotational adjustment during use, the first conductive contact 1012 can still maintain contact with the second conductive contact 1022, preventing unstable contact due to displacement and thus power failure of the electrical connection structure.

[0046] In some embodiments of this application, the contactable area S1 of the top portion of the first conductive contact 1012 is configured to be larger than the contactable area S2 of the top portion of the second conductive contact 1022. When the first connecting structure 101 and the second connecting structure 102 undergo relative displacement, since S1 > S2, the contact point of the second conductive contact 1022 always falls within the contact area of ​​the first conductive contact 1012, avoiding misalignment and disconnection that could lead to unstable electrical connections, thus improving user satisfaction and safety.

[0047] In some embodiments of this application, the first substrate 1011 and / or the second substrate 1021 are injection-molded plastic parts. The substrate material is selected as a high-temperature resistant, high-strength engineering plastic, which has insulation and dimensional stability, and is suitable for high-temperature environments such as hair styling tools. The mechanical structure (such as buckles and guide grooves) and conductive contact cavity of the substrate are formed in one step by injection molding, and the tolerance is controlled within a preset threshold.

[0048] The process for fixing inserts by injection molding includes the following steps:

[0049] 1. The first conductive contact 1012 and / or the second conductive contact 1022 are precisely placed in the mold cavity as metal inserts to ensure that the protrusion height of the first conductive contact 1012 and the contact position of the second conductive contact 1022 meet the design requirements.

[0050] 2. Inject molten plastic material to wrap the outer periphery of the metal insert, and after cooling, form a plastic matrix (first matrix 1011 and / or second matrix 1021). The first matrix 1011 and the second matrix 1021 form a preset mechanical interlocking structure to ensure that when the first connecting structure 101 and the second connecting structure 102 are engaged to the electrical connection position, the two are fixed by the mechanical locking mechanism and are in a locked state.

[0051] The insert injection molding of the present application embodiment enables the conductive contact to form a seamless bond with the plastic substrate, avoiding the loosening of the first conductive contact due to frequent insertion and removal, and providing a process feasibility guarantee for the large-scale production of electrical connection structures.

[0052] In some embodiments of this application, when the first connection structure 101 and the second connection structure 102 are engaged in the electrical connection position, they are fixed by a mechanical locking mechanism. By locking the two in the electrical connection position of the first connection structure 101 and the second connection structure 102, this embodiment effectively solves the connection stability problem in dynamic usage scenarios.

[0053] Based on the same inventive concept, this application also provides a handheld device, accessory, and hair styling tool, as described in the following embodiments. Since the principle by which this handheld device, accessory, and hair styling tool solves the problem is similar to that of the above embodiments, the implementation of this embodiment can refer to the implementation of the above method embodiments, and repeated details will not be elaborated further.

[0054] Figure 3 This diagram illustrates the structural connection between a handheld device and an accessory in an embodiment of this application. Figure 4 An exploded view of the connection structure between a handheld device and its accessories, as shown in an embodiment of this application, is presented. Figure 3 and Figure 4 As shown, the handheld device 302 includes a second connection structure 102, which includes a second base 1021 and a second conductive contact portion 1022 disposed within the second base 1021. The handheld device 302 is used to electrically connect with a first connection structure 101, which includes a first base 1011 and a first conductive contact portion 1012 disposed within the first base 1011. The top end portion of the first conductive contact portion 1012 protrudes from the surface of the first base 1011.

[0055] When the first connecting structure 101 and the second connecting structure 102 are connected, the first conductive contact 1012 contacts the second conductive contact 1022. The protrusion height of the first conductive contact 1012 is configured to maintain the contact between the first conductive contact 1012 and the second conductive contact 1022 when the first connecting structure 101 and the second connecting structure 102 are relatively displaced.

[0056] It should be noted that the handheld device 302 can be any handheld device, such as a curling iron handle, an electric shaver body, or an electric clipper body, including a second connecting structure 102, which is electrically connected to accessories, such as the curling iron heating element or the first connecting structure 101 on the shaving head assembly, in a detachable manner.

[0057] Based on the same inventive concept, this application also provides an appendix, which is similarly... Figure 3 and Figure 4 Taking the schematic diagram of the connection between the handheld device and the accessory as an example, the accessory 301 includes a first connecting structure 101, which includes a first base 1011 and a first conductive contact portion 1012 disposed within the first base 1011. The top end of the first conductive contact portion 1012 protrudes from the surface of the first base 1011. The accessory 301 is used for electrical connection with a second connecting structure 102, which includes a second base 1021 and a second conductive contact portion 1022 disposed within the second base 1021.

[0058] When the first connecting structure 101 and the second connecting structure 102 are connected, the first conductive contact 1012 contacts the second conductive contact 1022. The protrusion height of the first conductive contact 1012 is configured to maintain the contact between the first conductive contact 1012 and the second conductive contact 1022 when the first connecting structure 101 and the second connecting structure 102 are relatively displaced.

[0059] It should be noted that the accessory can be any device used in conjunction with the handheld device, such as a curling iron attachment, an electric shaver head, or an electric clipper accessory, including a first connecting structure 101, which is electrically connected to the second connecting structure 102 on the handheld device in a detachable manner.

[0060] Based on the same inventive concept, this application also provides a hair styling tool, which is similar in that... Figure 3 and Figure 4 Taking the schematic diagram of the connection between the handheld tool and the accessory as an example, the hair styling tool includes a handle and an accessory 301. The accessory 301 includes a first connecting structure 101, and the handle includes a second connecting structure 102.

[0061] The first connection structure 101 includes a first base 1011 and a first conductive contact portion 1012 disposed within the first base 1011, with the top end portion of the first conductive contact portion 1012 protruding from the surface of the first base 1011; the second connection structure 102 includes a second base 1021 and a second conductive contact portion 1022 disposed within the second base 1021.

[0062] When the handle is connected to the accessory 301, the first conductive contact 1012 contacts the second conductive contact 1022. The protrusion height of the first conductive contact 1012 is configured to maintain the contact between the first conductive contact 1012 and the second conductive contact 1022 when the first connecting structure 101 and the second connecting structure 102 undergo relative displacement.

[0063] It should be noted that the hair styling tool can be any kind of tool for achieving hair styling. It is a detachable personal care device, including a handle and an accessory 301, which are connected by an electrical connection structure to achieve power transmission and function control. The specific types of the hair styling tool include, but are not limited to, curling irons, straighteners, hot air combs, hair dryers, or styling clips. The handle includes a built-in power module, control circuit, and a second connection structure 102. The second connection structure 102 includes a second base 1021 made of high-temperature resistant insulating plastic and a second conductive contact part 1022, such as an elastic contact pin, embedded inside the second base 1021, for transmitting power or control signals to the accessory 301.

[0064] Attachment 301 may be a heating roller, a ceramic plate hair straightener, or a nozzle, depending on its function, and may have built-in functional modules such as heating wire and negative ion generator; the first connection structure 101 is provided at the mounting end of attachment 301, including a first base 1011 and a first conductive contact part 1012 protruding from the surface of the first base 1011, with a protrusion height H=0.03-0.1mm, preferably 0.05-0.08mm.

[0065] When the accessory 301 is inserted into the handle to the electrical connection position, the protruding top of the first conductive contact 1012 makes surface contact or point contact with the second conductive contact 1022. During user operation, such as when rotating the curling iron to adjust the angle, the first connection structure 101 and the second connection structure 102 may shift. However, due to the protruding height design of the first conductive contact 1012, its top always covers the effective contact area of ​​the second conductive contact 1022, maintaining uninterrupted electrical connection.

[0066] Figure 5 A schematic diagram of the connection structure of a hair styling tool is shown, such as Figure 5 As shown, when the first connecting structure 101 and the second connecting structure 102 of the hair styling tool are connected, they are in the electrical connection position. At this time, the first connecting structure 101 and the second connecting structure 102 are in the locked state. The locking state is achieved by the buckle 50. The buckle 50 ensures that the accessory (or the first connecting structure 101) and the handle (or the second connecting structure 102) remain fixed when vibrating or swinging, so as to avoid the risk of the accessory accidentally falling off.

[0067] Taking a curling iron as an example, when the user inserts the curling iron (i.e., accessory 301) into the handle, the elastic contact pin of the second conductive contact 1022 is compressed and retracts, forming a stable contact with the protruding part of the first conductive contact 1012. When the user adjusts the position of the curling iron and the handle, the curling iron rotates around the handle axis, causing displacement of the first connecting structure 101 and the second connecting structure 102. However, the protrusion height H = 0.06 mm ensures continuous contact. The buckle 50 locks the first connecting structure 101 and the second connecting structure 102 in place, preventing excessive rotation from causing the connection to loosen. The elastic deformation of the second conductive contact 1022 and the protrusion height of the first conductive contact 1012 work together to enhance the stability of the electrical connection.

[0068] The hair styling tool of this application embodiment, by integrating a protruding first connection structure 101 and an elastic second connection structure 102, breaks through the bottleneck of electrical connection stability of traditional detachable electrical components, and significantly improves product life and user experience while ensuring safety.

[0069] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the appended claims.

Claims

1. An electrical connection structure, characterized in that, include: The first connection structure includes a first substrate and a first conductive contact portion disposed in the first substrate, wherein the top end portion of the first conductive contact portion protrudes from the surface of the first substrate. The second connection structure includes a second substrate and a second conductive contact portion disposed within the second substrate; When the first connecting structure and the second connecting structure are connected, the first conductive contact portion contacts the second conductive contact portion, and the protrusion height of the first conductive contact portion is configured to maintain the contact between the first conductive contact portion and the second conductive contact portion when the first connecting structure and the second connecting structure are relatively displaced.

2. The electrical connection structure according to claim 1, characterized in that, The protrusion height of the first conductive contact is 0.03-0.1 mm.

3. The electrical connection structure according to claim 2, characterized in that, The protrusion height of the first conductive contact is 0.05-0.08 mm.

4. The electrical connection structure according to claim 1, characterized in that, The second conductive contact is an elastic contact pin. The elastic contact pin has an elastic support and a conductive pin inside. The elastic support is used to elastically support the conductive pin, and the conductive pin forms an elastic contact with the first conductive contact.

5. The electrical connection structure according to claim 1, characterized in that, The contactable area of ​​the top portion of the first conductive contact is greater than the contactable area of ​​the top portion of the second conductive contact.

6. The electrical connection structure according to claim 1, characterized in that, The first substrate and / or the second substrate are injection-molded plastic parts, and the first conductive contact and / or the second conductive contact are fixed to the first substrate and / or the second substrate by insert injection molding.

7. The electrical connection structure according to claim 1, characterized in that, When the first connection structure and the second connection structure are in the electrically connected position, the first connection structure and the second connection structure are in a locked state. The electrically connected position is the position where the first connection structure and the second connection structure are electrically connected.

8. A handheld device, characterized in that, The device includes a second connection structure, which includes a second base and a second conductive contact disposed within the second base; the handheld device is used to electrically connect with a first connection structure, which includes a first base and a first conductive contact disposed within the first base, wherein the top portion of the first conductive contact protrudes from the surface of the first base. When the first connecting structure and the second connecting structure are connected, the first conductive contact portion contacts the second conductive contact portion, and the protrusion height of the first conductive contact portion is configured to maintain the contact between the first conductive contact portion and the second conductive contact portion when the first connecting structure and the second connecting structure are relatively displaced.

9. An accessory, characterized in that, The device includes a first connection structure, which includes a first base and a first conductive contact portion disposed within the first base, with the top end of the first conductive contact portion protruding from the surface of the first base; the accessory is used for electrical connection with a second connection structure, which includes a second base and a second conductive contact portion disposed within the second base. When the first connecting structure and the second connecting structure are connected, the first conductive contact portion contacts the second conductive contact portion, and the protrusion height of the first conductive contact portion is configured to maintain the contact between the first conductive contact portion and the second conductive contact portion when the first connecting structure and the second connecting structure are relatively displaced.

10. A hair styling tool, comprising a handle and accessories, characterized in that, The accessory includes a first connecting structure, and the handle includes a second connecting structure; The first connection structure includes a first substrate and a first conductive contact portion disposed within the first substrate, wherein the top end portion of the first conductive contact portion protrudes from the surface of the first substrate; the second connection structure includes a second substrate and a second conductive contact portion disposed within the second substrate. When the handle is connected to the accessory, the first conductive contact portion contacts the second conductive contact portion, and the protrusion height of the first conductive contact portion is configured to maintain the contact between the first conductive contact portion and the second conductive contact portion when the first connecting structure and the second connecting structure are relatively displaced.

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