A curling iron

Abstract

The utility model belongs to hairdressing technical field especially involves curler, including curling part, handle, the handle includes the casing, is equipped with the opening in casing one end, its inside is formed with the cavity, is fixed with motor and circuit board in the cavity, motor output end connects the pivot, the pivot other end connects curling part, the pivot outer periphery interval is equipped with a plurality of electrode rings, each electrode ring electricity is connected curling part, circuit board electricity connects a plurality of conductive spring piece, every conductive spring piece is with corresponding electrode ring outer wall elastic abutment, circuit board is equipped with a plurality of clamping grooves, is equipped with the clamping block on every conductive spring piece, clamping block and clamping groove plug-in, is equipped with the limit seat between circuit board and conductive spring piece, limit seat includes the frame and the fan -shaped plate that extends by the frame both sides to outward, be equipped with a plurality of recess on the fan -shaped plate, every recess is used to restrict a conductive spring piece. In the case of long -term use, the conductive spring piece and electric connection contact point state stability, promote the use safety and the working stability of curler.

Description

Technical Field

[0001] This utility model belongs to the field of hair styling technology, and in particular relates to a hair curler. Background Technology

[0002] A curling iron is a handheld electronic device used to curl hair, typically consisting of a handle and a heated curling head.

[0003] Chinese patent document CN108634527B discloses an integrated curling iron with cooling and setting functions, including a handle mechanism. One end of the handle mechanism is provided with a lower clamping mechanism and an upper clamping mechanism that clamps with the lower clamping mechanism. The upper clamping mechanism includes an upper clamping body and a first heating unit disposed within the upper clamping body. The lower clamping mechanism includes a lower clamping body and a second heating unit disposed within the lower clamping body. The lower clamping body is provided with a cooling air hole. After the upper and lower clamping mechanisms clamp and tighten the hair, the hair is wrapped around the upper and lower clamping mechanisms. The first and second heating units are energized to heat the hair. The integrated curling iron with cooling and setting functions is gradually pulled towards the ends of the hair. When the heated hair passes through the outside of the upper and lower clamping mechanisms, the hair deforms. The air supply mechanism disposed within the handle mechanism causes the cooling air hole to form air convection to cool and set the heated hair.

[0004] In the aforementioned patent document's technical solution, the conductive spring of the brush assembly is fixed and electrically connected to the first circuit board by welding. A drive motor drives the main body to rotate, and the conductive ring rotates synchronously, with the conductive spring maintaining sliding contact with the conductive ring. During this process, the rotation of the conductive ring continuously applies a force to the conductive spring, causing it to vibrate. This vibration is transmitted to the welding point, which is prone to fatigue loosening or cracking, leading to displacement of the conductive spring and poor contact between it and the electrode ring, affecting the continuity and reliability of the power supply. Utility Model Content

[0005] The purpose of this invention is to provide a hair curler that solves the problem in existing hair curlers where the conductive spring and control components are welded and fixed together, and the solder joints are prone to loosening and cracking, causing the conductive spring to shift and affecting the continuity and reliability of power supply.

[0006] To achieve the above objectives, this utility model provides a hair curler, including a curling part and a handle. The handle includes a housing with an opening at one end and a cavity inside. A motor and a circuit board are fixedly installed inside the cavity. The output end of the motor is connected to a rotating shaft, and the other end of the rotating shaft is connected to the curling part. Multiple electrode rings are spaced along the axial direction of the rotating shaft, and each electrode ring is electrically connected to the curling part. Multiple conductive springs are electrically connected to the circuit board. The number of conductive springs is the same as the number of electrode rings and corresponds one-to-one. Each conductive spring elastically abuts against the outer peripheral wall of the corresponding electrode ring to form an electrical contact point. The circuit board has multiple slots along its axial direction, and each conductive spring has a locking block. The locking block is inserted into the slot. A limiting seat is also provided between the circuit board and the conductive spring. The limiting seat is installed on the circuit board and includes a frame and a fan-shaped plate extending outward from both sides of the frame. The fan-shaped plate has multiple grooves, and each groove is used to constrain a conductive spring to limit its radial and axial movement.

[0007] Furthermore, the slot is a through slot that penetrates the circuit board, and the card block has a free end that extends out of the slot.

[0008] Furthermore, the conductive spring is a non-closed arc segment, and both free ends of the arc segment extend inward with inferior arc segments, both of which elastically abut against the outer wall of the electrode ring.

[0009] Furthermore, the frame of the limiting seat is a hollow structure, and a positioning pressure plate is provided on its top. The positioning pressure plate is perpendicular to the frame and placed on the top surface of the circuit board. The frame is attached to the side wall of the circuit board. The two sides of the circuit board are symmetrically provided with limiting steps. Both of the fan-shaped plates are provided with connecting arms extending towards the circuit board. The free end of the connecting arm forms an L-shaped step. The L-shaped step engages with the limiting step and cooperates with the positioning pressure plate to jointly position the limiting seat on the circuit board.

[0010] Furthermore, the width of the conductive spring sheet projected onto the sector plate is greater than the projected width of the sector plate.

[0011] Furthermore, the groove extends through the sector plate, and the sector plate has connecting vertical sections at both ends of the groove.

[0012] Furthermore, the limit seat is made of insulating material.

[0013] Furthermore, the housing includes a left housing and a right housing. The inner wall of the left housing is provided with multiple positioning blocks, and the right housing is provided with multiple positioning grooves. The positioning blocks and positioning grooves are engaged to form the housing. The circuit board is housed in the left housing. The upper part of the inner wall of the left housing is provided with a first fixing piece extending toward the circuit board for abutting against the side of the circuit board. The inner wall of the right housing is provided with multiple first pillars. The first pillars are provided with connecting holes, and the circuit board is provided with through holes at corresponding positions. A locking member passes through the through holes and connecting holes to lock the circuit board onto the first pillars.

[0014] Furthermore, the outer periphery of the rotating shaft is provided with an upper bearing and a lower bearing along the axis, and a plurality of electrode rings are located between the upper bearing and the lower bearing; a fixing ring is sleeved on the outer periphery of the upper bearing, and the outer periphery of the fixing ring is provided with an annular flange; an upper positioning protrusion and a lower positioning protrusion extend inward from the inner sidewall of the housing respectively, and a positioning notch is formed between the upper positioning protrusion, the lower positioning protrusion and the inner sidewall of the housing for positioning the annular flange; a second fixing piece extends downward from the bottom of the fixing ring for abutting the side of the circuit board near the rotating shaft; a fixing seat is sleeved on the outer periphery of the lower bearing, and the fixing seat is located between the circuit board and the lower bearing; the fixing seat is provided with an arc-shaped groove on the side facing the lower bearing, and the arc-shaped groove is used to limit the outer ring of the lower bearing; the two ends of the fixing seat are provided with through holes; the right housing is provided with a second support column, and the second support column is provided with mounting holes; a locking member passes through the through holes and mounting holes to lock the fixing seat to the second support column; the fixing seat is provided with a third fixing piece extending towards the circuit board for abutting the side of the circuit board.

[0015] The hair curler provided in this embodiment of the present invention has at least the following technical effects: Because the circuit board is electrically connected to each conductive spring, the conductive spring elastically abuts against the electrode ring, and the electrode ring is electrically connected to and supplies power to the curling section. When the motor drives the shaft to rotate, it causes the electrode ring and the curling section to rotate synchronously, and the conductive spring and the electrode ring maintain dynamic contact.

[0016] The conductive spring is fixed to the circuit board by its locking block and slot, achieving precise positioning, facilitating soldering, and effectively preventing the conductive spring from shifting on the circuit board. The limiting seat has multiple grooves, each corresponding to a conductive spring, restricting the radial and axial movement of the conductive spring and preventing displacement. At the same time, the conductive spring contacts the sector plate, transmitting vibration to the sector plate, thereby reducing the vibration transmitted to the soldering point.

[0017] During long-term use, the conductive spring can maintain a stable connection with the circuit board, thereby ensuring that the electrical contact points are in a continuous and stable working state, effectively improving the safety and stability of the curling iron and extending its service life. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of a hair curler provided in an embodiment of the present invention.

[0020] Figure 2 An exploded view of the hair curler provided in an embodiment of this utility model.

[0021] Figure 3 A cross-sectional view of a hair curler provided in an embodiment of this utility model.

[0022] Figure 4 A partial structural diagram of the hair curler provided in an embodiment of this utility model.

[0023] Figure 5 A structural diagram of the conductive spring of the hair curler provided in this embodiment of the utility model.

[0024] Figure 6 This is a structural diagram of the right housing and motor of the hair curler provided in an embodiment of the present invention.

[0025] Figure 7 A structural diagram of the limiting seat of the hair curler provided in an embodiment of this utility model.

[0026] Figure 8 This is a structural diagram showing the connection between the circuit board, the limiting seat, and the conductive spring of the hair curler provided in this embodiment of the utility model.

[0027] Figure 9 A structural diagram showing the connection between the left housing and the fixing ring of the hair curler provided in this embodiment of the utility model.

[0028] Figure 10 A structural diagram of the fixing ring of the hair curler provided in an embodiment of this utility model.

[0029] Figure 11 A structural diagram of the limiting seat of the hair curler provided in an embodiment of this utility model.

[0030] In the diagram, 100 is the handle, 110 is the left housing, 111 is the positioning block, 112 is the first fixing piece, 113 is the upper positioning protrusion, 114 is the lower positioning protrusion, 115 is the positioning notch, 116 is the limiting piece, 120 is the right housing, 121 is the first support column, 122 is the connecting hole, 123 is the positioning groove, 124 is the second support column, 125 is the mounting hole, 126 is the support rib, 127 is the limiting arm, and 128 is the limiting pressure plate. 200, Circuit board; 210, Card slot; 220, Through hole; 230, Limiting step; 240, Square groove. 300. Motor; 310. Shaft; 311. Electrode ring; 312. Insulating ring; 320. Upper bearing; 330. Lower bearing; 340. Retaining ring; 341. Annular flange; 342. Second retaining plate; 350. Retaining seat; 351. Arc groove; 352. Through hole; 353. Third retaining plate; 360. Upper part; 370. Lower part. 400. Conductive spring; 410. Locking block; 420. Arc segment; 430. Minor arc segment. 500. Limiting seat; 510. Frame; 520. Sector-shaped plate; 521. Connecting arm; 522. L-shaped step; 523. Groove; 524. Connecting vertical section; 530. Positioning pressure plate; 531. Side section; 532. Horizontal section; 533. Protrusion. 600. Curly Hair Section. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0032] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this embodiment of the invention, unless otherwise explicitly 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 or an electrical 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 embodiment of the invention according to the specific circumstances.

[0035] In one embodiment of the hair curler of this utility model, please refer to Figures 1 to 11 A hair curler includes a curling part 600 and a handle 100. The handle 100 includes a left housing 110 and a right housing 120. A positioning block 111 is provided on the inner side wall of the left housing 110, and a positioning groove 123 is provided on the corresponding side wall of the right housing 120. The positioning block 111 and the positioning groove 123 engage to tightly combine the left housing 110 and the right housing 120 to form a housing. One end of the housing is provided with an opening, and a cavity is formed inside to accommodate multiple parts.

[0036] Please refer to Figure 2 and Figure 4 Within the cavity of the housing, a motor 300 and a circuit board 200 are fixedly installed. The motor 300 is located in the middle of the housing, and the circuit board 200 is located inside the left housing 110. The output end of the motor 300 faces the opening of the housing and is connected to a rotating shaft 310. The other end of the rotating shaft 310 is connected to the curling section 600 at the opening of the housing. Multiple electrode rings 311 are spaced along the axis of the rotating shaft 310. Each electrode ring 311 is electrically connected to a heating element within the curling section 600 for power supply and heating. An insulating ring 312, preferably made of plastic, is provided between adjacent electrode rings 311 to separate them and prevent short circuits caused by contact. Preferably, there are four electrode rings 311.

[0037] Please refer to Figure 4 and Figure 5Each electrode ring 311 has a conductive spring piece 400 disposed on its outer periphery. The number of electrode rings 311 is the same as the number of conductive spring pieces 400, and they correspond one-to-one. The conductive spring piece 400 is a non-closed arc segment 420, and both free ends of the arc segment 420 extend inward with minor arc segments 430. The two minor arc segments 430 have a point on their adjacent sides that is closest to each other, and the distance between the two closest points is less than the outer diameter of the electrode ring 311 in its natural state. During installation, the conductive spring piece 400 is pressed radially into the electrode ring 311, and the elastic restoring force makes the two minor arc segments 430 tightly abut against the outer wall of the electrode ring 311, thereby forming a stable and reliable electrical contact point. The electrode ring 311 and the conductive spring piece 400 are preferably made of copper.

[0038] Please refer to Figure 2 and Figure 5 The conductive spring 400 has a locking block 410 on its outer side of the arc-shaped segment 420. The circuit board 200 is located between the left housing 110 and the conductive spring 400. The circuit board 200 has multiple slots 210 along its axial direction that correspond to the number and position of the locking blocks 410. During installation, the locking blocks 410 are inserted into the slots 210 to fix the conductive spring 400 to the circuit board 200, providing accuracy assurance for subsequent electrical connections and effectively preventing the conductive spring 400 from shifting during use.

[0039] Preferably, the slot 210 is a through slot penetrating the circuit board 200. The side of the circuit board 200 closest to the left housing 110 is the component surface, on which multiple electronic components are arranged to facilitate interaction with switches, adjustment buttons, and other components on the left housing 110. The side of the circuit board 200 closest to the conductive spring 400 and the rotating shaft 310 is a smooth surface to prevent interference between electronic components and moving parts. The locking block 410 of the conductive spring is inserted into the smooth surface of the circuit board 200 and extends its free end from the component surface. The through-hole design facilitates assembly and soldering, enhances the stability of the connection between the conductive spring 400 and the circuit board 200, and reduces the risk of unstable insertion due to the thinness of the circuit board 200.

[0040] Please refer to Figure 2 , Figure 7 and Figure 8 A limiting seat 500 is provided between the circuit board 200 and the conductive spring 400, and the limiting seat 500 is mounted on the circuit board 200. The limiting seat 500 includes a frame 510 and fan-shaped plates 520 extending outward from both sides of the frame 510. The frame 510 has a hollow structure and is attached parallel to the smooth surface of the circuit board 200, so that the locking block 410 of the conductive spring 400 can be inserted into the locking slot 210 and contact the smooth surface of the circuit board 200.

[0041] Please refer to Figure 7The sector plate 520 has multiple grooves 523 spaced along its height, each groove 523 constraining a conductive spring piece 400. The height of the groove 523 matches the height of the conductive spring piece 400, limiting axial movement of the conductive spring piece 400. The groove 523 is preferably a through structure to reduce the overall weight of the limiting seat 500. The sector plate 520 has connecting vertical sections 524 at both ends of the grooves 523, and the orthographic projection width of the conductive spring piece 400 in the width direction of the sector plate 520 is greater than the projected width of the sector plate 520. Therefore, the limiting seat 500 effectively restricts lateral movement of the conductive spring piece 400. Simultaneously, the outer wall of the conductive spring piece 400 contacts the inner wall of the sector plate 520, transmitting vibration to the sector plate 520 and reducing vibration transmitted to the welding point. This ensures stable contact between the conductive spring piece 400 and the electrode ring 311, guaranteeing the stability of the electrical connection contact point.

[0042] Please refer to Figure 7 and Figure 8 The top of the frame 510 is bent to provide a positioning pressure plate 530. The positioning pressure plate 530 is perpendicular to the circuit board 200 and placed on top of the circuit board 200, with the circuit board 200 providing support for the positioning pressure plate 530. Symmetrical limiting steps 230 are provided on both sides of the circuit board 200. Connecting arms 521 extending towards the circuit board 200 are provided on the two fan-shaped plates 520. The free ends of the connecting arms 521 are provided with L-shaped steps 522. The vertical section of the L-shaped step 522 abuts against the component surface of the limiting step 230, and the horizontal section of the L-shaped step 522 supports the bottom surface of the limiting step 230. Working in conjunction with the positioning pressure plate 530, they stably fix the limiting seat 500 onto the circuit board. The limiting seat 500 is made of insulating material, preferably plastic.

[0043] The positioning plate 530 is preferably n-shaped, including two side sections 531 of the connecting frame 510 and a horizontal section 532 connecting the two side sections. The top of the circuit board 200 is provided with two downwardly recessed square grooves 240. The two side sections 531 are inserted into the square grooves 240 to form a preliminary limit. The connection between the two side sections 531 and the horizontal section 532 is provided with a protrusion 533. The protrusion 533 abuts against the component surface. The frame 510 fits against the smooth surface of the circuit board 200 to further stabilize the limiting seat 500.

[0044] Please refer to Figure 2 and Figure 6 The circuit board 200 has multiple through holes 220 on both sides, and the inner wall of the right housing 120 has multiple first pillars 121 at corresponding positions. Each first pillar 121 has a connecting hole 122. A locking member passes through the through holes 220 and the connecting holes 122 to securely lock the circuit board 200 onto the first pillar 121, making it stable within the housing and preventing interference to the conductive spring 400 caused by the circuit board 200 shaking. The locking member is preferably a bolt.

[0045] Preferably, the first support column 121 is a stepped cylindrical structure, with its smaller outer diameter free end extending into the through hole 220 for precise positioning, while the larger outer diameter stepped surface abuts against the smooth surface of the circuit board 200, further enhancing the support effect.

[0046] Please refer to Figure 3 The outer circumference of the rotating shaft 310 is provided with an upper bearing 320 and a lower bearing 330 spaced apart along its axis. The rotating shaft 310 is rotatably supported in the housing by the upper bearing 320 and the lower bearing 330, and multiple electrode rings 311 are located between the upper bearing 320 and the lower bearing 330.

[0047] Please refer to Figure 3 , Figure 9 and Figure 10 A retaining ring 340 is fitted around the outer periphery of the upper bearing 320. An annular flange 341 is provided around the outer periphery of the retaining ring 340. Upper positioning protrusions 113 and lower positioning protrusions 114 extending inwards are provided at corresponding positions on the inner sidewalls of the left housing 110 and right housing 120. The upper positioning protrusions 113 and 114 are arranged vertically opposite each other, forming a positioning notch 115 on the inner sidewall of the housing. The annular flange 341 of the retaining ring 340 engages with the positioning notch 115, thereby circumferentially fixing the outer ring of the upper bearing 320. A second retaining piece 342 extends downwards from the bottom of the retaining ring 340, abutting against the upper edge of the smooth surface of the circuit board 200. Preferably, a stop groove is provided on the sidewall of the annular flange 341, and the lower positioning protrusion 114 extends into the stop groove to restrict the rotation of the retaining ring 340.

[0048] Please refer to point 3. Figure 4 , Figure 6 and Figure 11 A fixing seat 350 is fitted around the outer periphery of the lower bearing 330. The fixing seat 350 is located between the circuit board 200 and the lower bearing 330. The fixing seat 350 has an arc-shaped groove 351 on the side facing the lower bearing 330 to limit the outer ring of the lower bearing 330. The fixing seat 350 has through holes 352 at both ends. The right housing 120 has a second support column 124 at the corresponding position. The second support column 124 has a mounting hole 125. By passing a locking member through the through hole 352 and the mounting hole 125, the fixing seat 350 is locked to the second support column 124, thereby limiting the left outer ring of the lower bearing 330. The inner side wall of the right housing 120 also has a vertical plate extending to the right side of the lower bearing 330. The vertical plate has a limiting groove to limit the right outer ring of the lower bearing 330. The fixing seat 350 also has a third fixing piece 353 extending towards the smooth surface of the circuit board 200 to abut against the circuit board 200.

[0049] The inner wall of the left housing 110 is provided with a first fixing piece 112 extending above the component surface of the circuit board 200, which is used to abut against the upper part of the component surface of the circuit board 200. The first fixing piece 112 cooperates with the second fixing piece 342 and the third fixing piece 353 to form a clamp and support for the circuit board 200 from multiple directions, effectively preventing it from shaking under force, thereby ensuring the stability of the conductive spring 400.

[0050] The upper bearing 320 and the lower bearing 330 are fixed inside the housing and cooperate to limit the two ends of the rotating shaft 310, so that the two bearings coincide with the central axis of the rotating shaft 310. This effectively prevents the rotating shaft 310 from becoming eccentric during rotation, improves the rotational stability of the rotating shaft 310, the electrode ring 311, and the curling part 600, further ensures the reliable electrical connection between the electrode ring 311 and the conductive spring 400, and extends the service life of the curling iron.

[0051] Please refer to Figure 6 The motor 300 is cylindrical in shape, divided into an upper part 360 and a lower part 370. The upper part 360 is a standard cylinder, while the lower part 370 has symmetrical and inwardly concave planes on both sides, forming a capsule-shaped cross-section. The cross-sectional area of ​​the lower part 370 is smaller than that of the upper part 360. A limiting structure is provided inside the right housing 120 for securely mounting the motor 300. Two first pillars 121 on the right housing 120, located on the same horizontal plane, abut against the two side planes of the lower part of the motor 300, providing initial horizontal limiting for the motor 300. Supporting ribs 126 extend upward from the top of each of the two first pillars 121, jointly supporting the bottom surface of the upper part 360 of the motor and providing vertical support. The right housing 120 also has a limiting arm 127 that laterally covers the outer periphery of the motor, and a limiting pressure plate 128 that presses the top of the motor 300 from above. Meanwhile, a limiting piece 116 is provided on the inner side of the left housing 110 to abut against the outer side of the motor 300. A through slot is provided on the circuit board 200 at the corresponding position to allow the limiting piece 116 to pass through, and the two do not contact each other. Through multiple limiting measures, the motor 300 is firmly positioned in the center of the housing, effectively preventing eccentric shaking during operation, and the vibration generated by the motor 300 during operation can be directly transmitted to the housing and absorbed, reducing the amplitude and ensuring the stability of the electrical contact points.

[0052] The assembly process of this hair curler is as follows: Install the motor 300 into the right housing 120. Place the rotating shaft 310, which includes an electrode ring 311, an insulating ring 312, an upper bearing 320, a lower bearing 330, and a fixing ring 340, into the right housing 120, connecting the two ends of the rotating shaft 310 to the output end of the motor 300 and the curling section 600, respectively. Then, lock the fixing seat 350 onto the second support column 124 to fix the lower bearing 330. Next, attach the limiting seat 500 to the circuit board 200. Insert the multiple conductive spring clips 410 into the slots 210 of the circuit board and make electrical connections. Then, lock the circuit board 200, which houses the limiting seat 500 and the conductive spring clips 400, onto the first support column 121. Finally, align and fasten the left housing 110 and the right housing 120 to complete the assembly.

[0053] Because the circuit board 200 is electrically connected to each conductive spring 400, the conductive spring 400 elastically abuts against the electrode ring 311, and the electrode ring 311 is electrically connected to and supplies power to the curling section 600. When the motor 300 drives the rotating shaft 310 to rotate, it drives the electrode ring 311 and the curling section 600 to rotate synchronously. The conductive spring 400 and the electrode ring 311 always maintain dynamic contact, achieving stable power supply. The curling iron adopts a multi-stabilization structure. Through the snap-fit ​​between the circuit board 200 and the conductive spring 400, the constraint of the conductive spring 400 by the limiting seat 500, the locking and positioning of the circuit board 200 with the first support 121 and the fixing plate, and the stable support of the rotating shaft 310 by the double bearings, the circuit board 200 and the electrical contact points are kept stable under long-term use or accidental drop impact, thereby improving the safety and service life of the curling iron.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hair curler, characterized in that, The device includes a curling section and a handle. The handle includes a housing with an opening at one end and a cavity inside. A motor and a circuit board are fixedly installed inside the cavity. The output end of the motor is connected to a rotating shaft, and the other end of the rotating shaft is connected to the curling section. Multiple electrode rings are spaced axially around the outer circumference of the rotating shaft, and each electrode ring is electrically connected to the curling section. Multiple conductive springs are electrically connected to the circuit board. The number of conductive springs is the same as the number of electrode rings and corresponds one-to-one. Each conductive spring elastically abuts against the outer peripheral wall of the corresponding electrode ring to form an electrical contact point. The circuit board has multiple slots along its axial direction, and each conductive spring has a locking block. The locking block is inserted into the slot. A limiting seat is also provided between the circuit board and the conductive spring. The limiting seat is mounted on the circuit board and includes a frame and a fan-shaped plate extending outward from both sides of the frame. The fan-shaped plate has multiple grooves. Each groove is used to constrain one of the conductive springs to limit its radial and axial movement.

2. The curling iron according to claim 1, characterized in that: The slot is a through slot that passes through the circuit board, and the card block has a free end that extends out of the slot.

3. The curling iron according to claim 1, characterized in that: The conductive spring is a non-closed arc segment, and both free ends of the arc segment extend inward with inferior arc segments, both of which elastically abut against the outer wall of the electrode ring.

4. The hair curler according to claim 3, characterized in that: The frame of the limiting seat is a hollow structure, and a positioning pressure plate is provided on its top. The positioning pressure plate is perpendicular to the frame and placed on the top surface of the circuit board. The frame is attached to the side wall of the circuit board. The two sides of the circuit board are symmetrically provided with limiting steps. Both of the fan-shaped plates are provided with connecting arms extending towards the circuit board. The free end of the connecting arm forms an L-shaped step. The L-shaped step engages with the limiting step and cooperates with the positioning pressure plate to jointly position the limiting seat on the circuit board.

5. The curling iron according to claim 1, characterized in that: The width of the conductive spring sheet projected onto the sector plate is greater than the projected width of the sector plate.

6. The curling iron according to claim 5, characterized in that: The groove extends through the sector plate, and the sector plate has connecting vertical sections at both ends of the groove.

7. The curling iron according to claim 1, characterized in that: The limit seat is made of insulating material.

8. The curling iron according to any one of claims 1 to 7, characterized in that: The housing includes a left housing and a right housing. The inner wall of the left housing is provided with multiple positioning blocks, and the right housing is provided with multiple positioning grooves. The positioning blocks and positioning grooves are engaged to form the housing. The circuit board is housed in the left housing. The upper part of the inner wall of the left housing is provided with a first fixing piece extending toward the circuit board for abutting against the side of the circuit board. The inner wall of the right housing is provided with multiple first pillars. The first pillars are provided with connecting holes, and the circuit board is provided with through holes at corresponding positions. A locking member passes through the through holes and connecting holes to lock the circuit board onto the first pillars.

9. The curling iron according to claim 8, characterized in that: The outer periphery of the rotating shaft is provided with an upper bearing and a lower bearing along the axis, and a plurality of electrode rings are located between the upper bearing and the lower bearing; a fixing ring is sleeved on the outer periphery of the upper bearing, and an annular flange is provided on the outer periphery of the fixing ring; an upper positioning protrusion and a lower positioning protrusion extend inward from the inner sidewall of the housing, and a positioning notch is formed between the upper positioning protrusion, the lower positioning protrusion and the inner sidewall of the housing for positioning the annular flange; a second fixing piece extends downward from the bottom of the fixing ring for abutting the side of the circuit board near the rotating shaft; A fixing seat is fitted around the outer periphery of the lower bearing. The fixing seat is located between the circuit board and the lower bearing. The fixing seat has an arc-shaped groove on the side facing the lower bearing. The arc-shaped groove is used to limit the outer ring of the lower bearing. The fixing seat has through holes at both ends. The right housing has a second support column. The second support column has a mounting hole. A locking member passes through the through hole and the mounting hole to lock the fixing seat to the second support column. The fixing seat has a third fixing piece extending towards the circuit board to abut against the side of the circuit board.

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