hair dryer

Abstract

To provide an easy-to-assemble PTC ceramic heating hair dryer that solves problems such as complicated assembly of semiconductor heating elements, unstable fixation, and generation of vibration and noise. [Solution] This hair dryer includes a housing (100), a blower (200), and a handle (300), and has an accommodating passage and a first orifice, a second orifice, and a third orifice communicating with the accommodating passage opened in the housing, a wiring hole provided on the side of the blower, a first attachment structure provided on the end of the outer wall of the blower near the first orifice, and a second attachment structure provided on the inner wall of the accommodating passage, and is configured so that the blower is moved and rotated to attach the first attachment structure to the second attachment structure and connect the wiring hole to the third orifice, thereby electrically connecting the electrical wires of the blower to the handle via the wiring hole and the third orifice.

Description

[Technical Field]

[0001] The present invention relates to the field of hair dryers, and more particularly to a PTC ceramic heating type hair dryer that is easy to assemble. [Background technology]

[0002] Hair dryers are common household appliances used for styling and care of hair, helping to dry hair quickly with high-speed airflow and thermal energy. Their main components include a motor, a fan, and a heating element. The motor drives the fan to blow out air, which is then heated by an electric or ceramic heating element to create warm air. Some models also have a cool air mode and negative ion function to reduce static electricity and improve hair dryness. Hair dryers can significantly reduce the time it takes for hair to dry naturally, making them an indispensable tool in daily life and bringing great convenience to hair care and styling.

[0003] However, semiconductor heating elements (e.g., PTC ceramic heating elements) face the problem of difficult assembly when applied to hair dryers. Because semiconductor heating elements must be precisely fixed and ensure heat dissipation and mechanical stability during operation, conventional mounting methods often fail to meet these requirements. Conventional mounting structures are prone to misalignment or instability during assembly, resulting in vibration and noise during device operation and potentially affecting safety due to poor heat dissipation. Furthermore, ensuring damping and thermal insulation of semiconductor heating elements under high-temperature operating conditions is a rapidly growing challenge for conventional designs. These issues not only reduce the assembly efficiency of hair dryers but also increase manufacturing and maintenance costs.

[0004] To solve the problems of complicated assembly of semiconductor heating elements in hair dryers, unstable fixing, and generation of vibration and noise, the objective is to provide an easy-to-assemble PTC ceramic heating hair dryer, improve the installation precision, mechanical stability and heat dissipation performance of the heating element, ensure the damping effect and safety when the product is operating at high temperatures, and improve the overall assembly efficiency and service life. Summary of the Invention [Problem to be solved by the invention]

[0005] To solve the above problems, the present invention provides a PTC ceramic heating hair dryer that is easy to assemble, and solves the problems of complicated assembly of semiconductor heating elements in hair dryers, unstable fixation, and the generation of vibration and noise. [Means for solving the problem]

[0006] The present invention is realized by the following technical solutions:

[0007] The present invention relates to an easy-to-assemble PTC ceramic heating hair dryer, which includes a housing, a blower, and a handle. The housing has a receiving passage and a first orifice, a second orifice, and a third orifice communicating with the receiving passage. The blower passes through the second orifice and enters the receiving passage. A wiring hole is provided on the side of the blower. A first attachment structure is provided on the outer wall of the blower at an end close to the first orifice. The housing has a second attachment structure on the inner wall of the receiving passage. The blower moves and rotates to attach the first attachment structure to the second attachment structure and connect the wiring hole to the third orifice, so that the electric wires of the blower can be easily electrically connected to the handle via the wiring hole and the third orifice. The blower device includes an inner case, a fixing ring, a fan, and a ceramic heating element, the fan and the fixing ring are fitted in the inner case, the ceramic heating element is fitted in the fixing ring, and the fan blows air onto the ceramic heating element and into the second orifice.

[0008] Furthermore, the fixing ring has a fixing hole, and a fastening groove communicating with the fixing hole is formed in the inner wall of the fixing ring, the ceramic heating element has a cylindrical shape, and is inserted into the fixing hole, with its outer circumferential side wall being engaged in the fastening groove, The inner case includes a first inner case provided with an annular flange and a second inner case provided with an annular arc-shaped groove, the second inner case has an annular abutment portion formed inside the annular arc-shaped groove, the fixing ring abuts against the end of the annular abutment portion, the annular flange is fitted in the annular arc-shaped groove, the end of the fixing ring away from the annular abutment portion abuts against the inner wall of the first inner case, and the outer circumferential side wall of the fixing ring abuts against the annular flange.

[0009] Furthermore, the first engaging structure includes a plurality of first engaging portions and a plurality of first undercut grooves, and the plurality of first engaging portions are alternately provided with the plurality of first undercut grooves; the second engagement structure includes one annular fixing groove, a plurality of second engagement portions, and a second relief groove, the annular fixing groove communicates with each of the second relief grooves, and the plurality of second engagement portions and the plurality of second relief grooves are alternately provided, The size, shape, and position of the plurality of first locking portions are adapted to fit into the plurality of second undercut grooves, and the size, shape, and position of the plurality of second locking portions are adapted to fit into the plurality of first undercut grooves; When the blower device moves toward the first orifice, each of the first locking portions simultaneously passes through each of the second relief grooves and avoids each of the second locking portions due to the first relief grooves, so that each of the first locking portions is provided within the annular fixing groove; When all of the first locking portions are provided in the annular fixing groove, the blower rotates to bring the first locking portions into contact with the second locking portions.

[0010] Furthermore, the housing has a protrusion on the inner wall of the accommodating passage, and the first locking portion has an arc-shaped groove opened toward the inner wall of the accommodating passage toward the housing, the protrusion fits into the arc-shaped groove, and when each of the first locking portions is provided in the annular fixing groove, the blower rotates to lock the protrusion into the arc-shaped groove.

[0011] Furthermore, when the protrusion is fitted in the arc-shaped groove, the wiring hole communicates with the third orifice, and the central axis of the wiring hole is the same as the central axis of the third orifice.

[0012] Furthermore, a fixed cover is provided at the end of the blower device close to the second orifice, and when the blower device passes through the second orifice and enters the storage passage, the fixed cover is engaged with the outer peripheral wall of the housing.

[0013] Furthermore, a locking ring is provided on the inner peripheral wall of the fixed cover, and a locking groove is provided on the outer peripheral wall of the housing, and the locking ring is engaged in the locking groove, thereby engaging the fixed cover to the outer peripheral wall of the housing.

[0014] Furthermore, the locking ring is made of a deformable material, and an annular convex arc is provided on the outer peripheral wall of the housing, and the annular convex arc is provided on one side of the locking groove. During the process of the locking ring being engaged in the locking groove, the locking ring presses the annular convex arc by elastic deformation and is engaged in the locking groove.

[0015] Furthermore, the above-mentioned easy-to-assemble PTC ceramic heating hair dryer further includes a nozzle, the nozzle is attached to the fixed cover, the fixed cover has a first ventilation hole communicating with the accommodating passage, the nozzle has a second ventilation hole, and the blower blows air sequentially through the first ventilation hole and the second ventilation hole.

[0016] Furthermore, the above-mentioned easy-to-assemble PTC ceramic heating hair dryer further includes a rear cover, the rear cover covering the first orifice, and a third ventilation hole communicating with the accommodating passage, through which external airflow enters the blower device. [Effects of the Invention]

[0017] The beneficial effects of the present invention are as follows:

[0018] In the PTC ceramic heating hair dryer provided by the present invention, the central axis of the first orifice is the same as the central axis of the second orifice, and the central axis of the first orifice is perpendicular to the central axis of the third orifice. The blower passes through the second orifice and enters the receiving passage. A wiring hole is provided on the side of the blower. A first fastening structure is provided at the end of the outer wall of the blower close to the first orifice. The housing is provided with a second fastening structure on the inner wall of the receiving passage. The blower moves and rotates to fasten the first fastening structure to the second fastening structure, and the wiring hole is connected to the third orifice. Thus, the electric wire of the blower can be manually connected through the wiring hole and the third orifice. The blower includes an inner case, a fixing ring, a fan, and a ceramic heating element, the fan and fixing ring being fitted within the inner case, the ceramic heating element being fitted within the fixing ring, and the fan blowing onto the ceramic heating element and into the second orifice; the blower includes an inner case, a fixing ring, a fan, and a ceramic heating element, the fixing ring being made of a damping material, the fan and fixing ring being fitted within the inner case, the ceramic heating element being fitted within the fixing ring, and the fan blowing onto the ceramic heating element and into the second orifice, thereby ensuring that the airflow can be smoothly discharged after passing through the ceramic heating element. Accurate installation and fixing of the blower achieves an efficient and stable assembly method, greatly simplifying the assembly process and reducing manufacturing and maintenance costs. In addition, in this design, the ceramic heating element and the fan are firmly fixed inside the inner case using a precise fastening method, which improves the installation precision, mechanical stability and heat dissipation performance of the ceramic heating element, ensures the damping effect and safety of the fixing ring when the ceramic heating element of the product is operating at high temperatures, and improves the overall assembly efficiency and service life. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view of the entire PTC ceramic heating type hair dryer according to the present invention, which is easy to assemble; [Figure 2]1 is a perspective view of an easy-to-assemble PTC ceramic heating hair dryer according to the present invention; [Figure 3] FIG. 3 is an overall cross-sectional view of the P1-P1 portion of FIG. 2. [Figure 4] 1 is an exploded perspective view of an easy-to-assemble PTC ceramic heating hair dryer according to the present invention; FIG. [Figure 5] 2 (an exploded view similar to FIG. 4). [Figure 6] FIG. 2 is a perspective view of the housing of the present invention. [Figure 7] FIG. [Figure 8] 1 is a perspective view of a blower device according to the present invention; [Figure 9] FIG. [Figure 10] FIG. 2 is a perspective view of the housing of the present invention. [Figure 11] FIG. 2 is a top view of the housing of the present invention. [Figure 12] FIG. 12 is a cross-sectional view taken along the line P2-P2 in FIG. [Figure 13] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to explain the technical solutions of the present invention more clearly and completely, the present invention will be further described below with reference to the drawings.

[0021] 1 to 13, the present invention includes a housing 100, a blower 200, and a handle 300. The housing 100 is provided with a receiving passage 110 and a first orifice 120, a second orifice 130, and a third orifice 140 communicating with the receiving passage 110. The central axis of the first orifice 120 is the same as the central axis of the second orifice 130, and the central axis of the first orifice 120 is perpendicular to the central axis of the third orifice 140. The blower 200 passes through the second orifice 130 and enters the receiving passage 110. A wiring hole 210 is provided on the side of the blower 200. A first fastening structure (not shown) is provided on the outer peripheral wall of the blower 200 at an end close to the first orifice 120. The housing 100 is provided with a second fastening structure on the inner wall of the receiving passage 110. The PTC ceramic heating hair dryer 10 is provided with a structure (not shown) in which the air blower 200 moves and rotates to attach the first attachment structure to the second attachment structure and to connect the wiring hole 210 to the third orifice 140, so that the electric wire of the air blower 200 can be easily electrically connected to the handle 300 via the wiring hole 210 and the third orifice 140, and the air blower 200 includes an inner case (not shown), a fixing ring 250, a fan (motor) 260, and a ceramic heating element 270, the fan 260 and the fixing ring 250 are fixed to the inner case, the ceramic heating element 270 is fixed within the fixing ring 250, and the fan 260 blows air onto the ceramic heating element 270 and into the second orifice 130, thereby providing an easy-to-assemble PTC ceramic heating hair dryer 10.

[0022] Specifically, the housing 100 is provided with an accommodating passage 110 and first, second, and third orifices 120, 130, and 140 that communicate with the accommodating passage 110. The first and second orifices 120 and 130 share the same central axis, ensuring that the blower device 200 can be smoothly moved and attached in the same axial direction, ensuring accuracy and convenience in the assembly process. The central axes of the first and third orifices 120 and 140 are perpendicular to each other, ensuring rational wiring of electrical cables, allowing the electrical cables of the blower device 200 to smoothly pass through the third orifice 140 and connect to the circuitry inside the handle 300. The blower device 200 enters the accommodating passage 110 through the second orifice 130, and a wiring hole 210 is provided on its side. A first fastening structure is provided on the outer wall of the blower 200 near the first orifice 120, and a second fastening structure is provided on the inner wall of the receiving passage 110 of the housing 100. As the blower 200 moves and rotates, the first fastening structure engages with the second fastening structure, achieving a stable connection between the components and restricting and fixing their position. When the blower 200 is connected to the handle 300, the electrical wires can smoothly pass through the wiring hole 210 and connect to the third orifice 140, thereby achieving a streamlined layout for internal wiring and preventing the electrical wires from being pressed or tangled. The use of the fastening structure allows workers to complete assembly with simple movement and rotation operations without the need for complex tools or multiple adjustments, significantly improving assembly efficiency. This structural design avoids the problems of misalignment and loosening that often occur with conventional screw fastening methods and increases assembly speed.

[0023] The fan 260 and the fixing ring 250 are fitted inside the inner case, and the ceramic heating element is fitted inside the fixing ring 250, thereby realizing accurate installation and fixing of the blower 200. The air outlet of the fan 260 faces the ceramic heating element 270 and guides the airflow to the second orifice 130, thereby ensuring that the airflow can be smoothly discharged after passing through the ceramic heating element 270. In this design, the heating element and the fan 260 are firmly fixed inside the blower 200 through a precise fitting method, which not only improves the installation accuracy of the assembly but also avoids the cumbersome operation required for conventional screw fastening methods.

[0024] As described above, the air blower 200 uses translation and rotation to connect the first and second fastening structures, achieving an efficient and stable assembly method. Compared with the screw-fastening design of traditional hair dryers, this solution significantly simplifies the assembly process and reduces manufacturing and maintenance costs. The rational wiring design ensures the safety and reliability of the internal circuitry and reduces the risk of interference between assemblies. Furthermore, the highly accurate positioning method for the ceramic heating element 270 within the fixing ring 250 prevents misalignment or loosening during assembly use, effectively reducing vibration and noise. This enhances the damping effect of the ceramic heating element 270 during high-temperature operation, preventing deformation or damage to the internal assembly due to thermal stress.

[0025] It should be noted that the fixing ring 250 can be silica gel, which can achieve vibration damping effect, and can also be aluminum alloy heat dissipation strip, which can achieve heat dissipation effect.

[0026] Referring to FIG. 13, the fixing ring 250 has a fixing hole 251, and the fixing ring 250 has a fastening groove 252 on the inner wall of the fixing hole 251, and the fastening groove 252 is connected to the fixing hole 251. The ceramic heating element 270 has a cylindrical shape and is inserted into the fixing hole 251, and its outer circumferential side wall is engaged in the fastening groove 252. The inner case includes a first inner case 241 having an annular flange 2411 and an annular groove 2421. The second inner case 242 has an annular abutment portion 2422 formed inside the annular groove 2421, the fixing ring 250 abuts against an end of the annular abutment portion 2422, the annular flange 2411 is engaged in the annular groove 2421, the end of the fixing ring 250 away from the annular abutment portion 2422 abuts against the inner wall of the first inner case 241, and the outer circumferential side wall of the fixing ring 250 abuts against the annular flange 2411.

[0027] Specifically, the fastening groove 252 communicates with the fixing hole 251, and the ceramic heating element 270 is designed as a cylinder and fits into the fixing hole 251, with its outer circumferential side wall fitting into the fastening groove 252, ensuring that the ceramic heating element 270 is stably and centrally positioned within the fixing ring 250. The position of the ceramic heating element 270 is limited by the fastening groove 252, avoiding vibration and instability issues caused by misalignment during installation, and the elastic material of the fixing ring 250 can absorb mechanical vibrations during operation, reducing noise and improving the user experience, as well as ensuring the long-term stability of the ceramic heating element and preventing displacement or loosening due to long-term use.

[0028] The fixing ring 250 abuts against the end of the annular abutment 2422, the annular flange 2411 is fitted into the annular groove 2421, the end of the fixing ring 250 away from the annular abutment 2422 abuts against the inner wall of the first inner case 241, and the outer circumferential side wall of the fixing ring 250 abuts against the annular flange 2411. The fit between the annular flange 2411 of the first inner case 241 and the annular groove 2421 of the second inner case 242 ensures the stability of the entire inner case structure and prevents loosening and displacement of the assembly. The elasticity of the fixing ring 250 and the close fit between the first inner case 241 and the second inner case 242 provide an excellent heat dissipation path for the ceramic heating element 270, avoiding potential safety hazards due to poor heat dissipation.

[0029] The optimized designs of the ceramic heating element 270, the fixing ring 250, the first inner case 241, and the second inner case 242 ensure precise mounting of the heating element and optimal heat attenuation and heat dissipation. The engagement structure between the annular flange 2411 and the annular groove 2421 not only improves assembly stability, but also ensures product safety and durability during long-term use. Compared with traditional screw fixing methods, this solution significantly reduces assembly difficulty and operating noise, providing a more reliable and efficient solution for the PTC ceramic heating hair dryer 10.

[0030] Referring to Figures 9 and 11, a fixed cover 230 is provided at the end of the blower 200 near the second orifice 130, and when the blower 200 passes through the second orifice 130 and enters the storage passage 110, the fixed cover 230 is engaged with the outer peripheral wall of the housing 100.

[0031] Specifically, the fixed cover 230 is attached to the first inner case 241, and is provided at the end of the blower device 200 closest to the second orifice 130. When the blower device 200 passes through the second orifice 130 and enters the receiving passage 110, the fixed cover 230 is attached to the outer circumferential wall of the housing 100. The design of the fixed cover 230 has a dual function. On the one hand, it provides additional physical support and positional constraints to the assembly after the blower device 200 is fully installed, ensuring that the blower device 200 does not loosen during use. On the other hand, the fastening structure of the fixed cover 230 speeds up the assembly process and avoids complex fastening work. This design effectively solves the problem of the conventional hair dryer 10, in which the internal assembly is not firmly fixed, resulting in increased vibration and noise during operation. This structural design of the fixed cover 230 not only enables the blower device 200 to be quickly connected to the housing 100, but also maintains stability and low noise during use. This design is particularly suitable for situations where frequent connection and disconnection are required, making the product easier to maintain and improving the user experience. Furthermore, the connection between the first and second connecting structures and the connection with the fixed cover 230 improves assembly stability, avoids noise problems caused by vibration, and extends the service life of the product.

[0032] 7, 8, and 10 to 12, in this embodiment, the first engagement structure includes a plurality of first locking portions 221 and first relief grooves 222, and the plurality of first locking portions 221 are alternately provided with the plurality of first relief grooves 222; the second engagement structure includes one annular fixing groove 151, a plurality of second locking portions 152, and a second relief groove 153, and the annular fixing groove 151 communicates with each of the second relief grooves 153, and the plurality of second locking portions 152 are alternately provided with the plurality of second relief grooves 153; and the size, shape, and position of the plurality of first locking portions 221 are the same as those of the plurality of second relief grooves 153. The size, shape and position of the plurality of second locking portions 152 are adapted to fit the plurality of first escape grooves 222, and as the blower device 200 moves in the direction of the first orifice 120, each of the first locking portions 221 simultaneously passes through each of the second escape grooves 153 and is avoided by each of the second locking portions 152 by the first escape grooves 222, so that each of the first locking portions 221 is provided within the annular fixing groove 151, and when each of the first locking portions 221 is provided within the annular fixing groove 151, the blower device 200 rotates to bring the first locking portions 221 into contact with the second locking portions 152.

[0033] Specifically, during assembly, the blower 200 passes through the second orifice 130 and moves toward the first orifice 120, causing each of the first locking portions 221 to pass through the corresponding second undercut grooves 153 and avoid the corresponding second locking portions 152 via the first undercut grooves 222. This design allows the blower 200 to be quickly coupled to the housing 100, avoiding the need for multiple adjustments in the past. After all of the first locking portions 221 are inserted into the annular fixing grooves 151, the blower 200 is rotated so that each of the first locking portions 221 abuts against the corresponding second locking portions 152, thereby completing the final fixation. This rotational engagement method not only simplifies the assembly process, but also improves the reliability of the connection.

[0034] In this embodiment, the first locking portions 221 have the same thickness, and the thickness of the first locking portions 221 is the same as the thickness of the annular fixing groove 151 .

[0035] Specifically, the thickness of the plurality of first locking portions 221 is the same as the thickness of the annular fixing groove 151. This design ensures that the first locking portions 221 are smoothly fitted into the annular fixing groove 151 during assembly, and that accurate positioning and tight bonding can be achieved after the completion of the fitting.

[0036] 8 and 10, in this embodiment, the housing 100 has a protrusion 154 on the inner wall of the accommodating passage 110, and the first locking portion 221 has an arc-shaped groove 2211 opened toward the housing 100 in the direction of the inner wall of the accommodating passage 110, and the protrusion 154 fits into the arc-shaped groove 2211. When each first locking portion 221 is all installed in the annular fixing groove 151, the blower device 200 rotates to lock the protrusion 154 into the arc-shaped groove 2211.

[0037] Specifically, the blower 200 moves along the receiving passage 110 and is fitted into the annular fixing groove 151 by the first locking portion 221. After the blower 200 is fully positioned, a further rotation operation causes the protrusion 154 on the inner wall of the housing 100 to fit into the arc-shaped groove 2211 of the first locking portion 221. The arc-shaped groove 2211 communicates with the annular fixing groove 151, ensuring that the protrusion 154 can be accurately fitted into the arc-shaped groove 2211 when the blower 200 rotates. This fitting structure design effectively solves the problems of misalignment and loosening of the assembly that can occur during conventional assembly, and improves the accuracy of the connection.

[0038] Referring to FIG. 10, in this embodiment, the convex portion 154 has a semicircular arc shape.

[0039] Specifically, the convex portion 154 has a semicircular arc shape and fits into the arc-shaped groove 2211. Due to the semicircular arc shape design of the convex portion 154, the contact surface of the blower device 200 with the arc-shaped groove 2211 transitions smoothly during rotation, reducing the frictional force during engagement and making operation smoother.

[0040] 7 and 9, in this embodiment, when the protrusion 154 is engaged in the arc-shaped groove 2211, the wiring hole 210 communicates with the third orifice 140, and the central axis of the wiring hole 210 is the same as the central axis of the third orifice 140.

[0041] Specifically, when the protrusion 154 is fitted into the arc-shaped groove 2211, the wiring hole 210 communicates with the third orifice 140, and the central axis of the wiring hole 210 is the same as the central axis of the third orifice 140. This allows the electrical wires inside the blower 200 to pass through the wiring hole 210 and the third orifice 140 in sequence along a predetermined path and be electrically connected to the handle 300, thereby further improving the accuracy of the electrical wire arrangement.

[0042] 9 and 11 , in this embodiment, a locking ring 231 is provided on the inner peripheral wall of the fixed cover 230, and a locking groove 160 is provided on the outer peripheral wall of the housing 100. The locking ring 231 is engaged in the locking groove 160, thereby securing the fixed cover 230 to the outer peripheral wall of the housing 100. The locking ring 231 is made of a deformable material, and the outer peripheral wall of the housing 100 is provided with an annular convex arc 170, which is located on one side of the locking groove 160. During the process of the locking ring 231 being engaged in the locking groove 160, the locking ring 231 presses against the annular convex arc 170 due to elastic deformation, thereby being engaged in the locking groove 160.

[0043] Specifically, when the fixed cover 230 is installed, i.e., when the locking ring 231 is fitted into the locking groove 160, the locking ring 231 elastically deforms and presses the annular convex arc 170 to fit into the locking groove 160. After resetting, the fixed cover 230 is tightly fitted to the housing 100. This structure reduces friction during fitting, making the installation process smoother and eliminating the need for complex jigs. This prevents the fixed cover 230 from loosening or falling off during use.

[0044] Referring to Figures 1 and 4, in this embodiment, the easily assembled PTC ceramic heating hair dryer 10 further includes a nozzle 400 attached to a fixed cover 230, the fixed cover 230 having a first ventilation hole 232 communicating with the receiving passage 110, the nozzle 400 having a second ventilation hole 410, and the blower 200 blows air sequentially through the first ventilation hole 232 and the second ventilation hole 410.

[0045] Specifically, the fixed cover 230 has a first ventilation hole 232 communicating with the receiving passage 110, and the nozzle 400 has a second ventilation hole 410 connected to the first ventilation hole 232. This structure ensures that the airflow from the blower 200 passes through the fixed cover 230 and the nozzle 400 sequentially, achieving a smooth airflow output and avoiding turbulence or blockage. The attachment of the nozzle 400 not only simplifies the assembly procedure but also facilitates cleaning and maintenance of the interior of the hair dryer 10. The user can quickly access the blower 200 by removing the rear cover 500, facilitating cleaning of ash, dust, and foreign matter and extending the service life of the device.

[0046] Referring to Figures 1 and 4, in this embodiment, the easily assembled PTC ceramic heating hair dryer 10 further includes a rear cover 500 covering the first orifice 120, and the rear cover 500 has a third ventilation hole 510 communicating with the receiving passage 110, and the external airflow enters the blower device 200 through the third ventilation hole 510.

[0047] Specifically, the rear cover 500 is attached to the first orifice 120 of the housing 100 by a fastening or fastening method, and communicates with the receiving passage 110. The third ventilation hole 510 on the rear cover 500 ensures that the outside air can smoothly enter the receiving passage 110, and the air is accelerated and heated by the blower 200, creating a powerful blowing effect, which is then blown through the first ventilation hole 232 and the second ventilation hole 410. In addition, the installation of the rear cover 500 not only simplifies the assembly procedure of the product, but also makes it easier to clean and maintain the interior of the hair dryer 10.

[0048] Of course, the present invention may have many other embodiments, and any other embodiments that can be obtained by those skilled in the art based on the present embodiment without any creative effort fall within the scope of protection of the present invention. [Explanation of symbols]

[0049] 10: Hair dryer 100: Housing 110: Storage corridor 120: First orifice 130: Second orifice 140: Third orifice 151: Annular fixing groove 152: Second locking portion 153: Second relief groove 154: Convex 160: Locking groove 170: Circular convex arc 200: Blower 210: Wiring hole 221: First locking part 2211: Arc-shaped concave groove 222: First relief groove 230: Fixed cover 231: Locking ring 232: First ventilation hole 241: First inner case 2411: Annular flange 242: Second inner case 2421: Circular groove 2422: Annular abutment 250: Fixed ring 251: Fixed hole 252: Fastening groove 260: Fan 270: Ceramic heating element 300: Handle 400: Nozzle 410: Second ventilation hole 500: Rear cover 510: 3rd ventilation hole

Claims

1. a hair dryer including a housing, a blower, and a handle, the housing having a storage passage and a first orifice, a second orifice, and a third orifice communicating with the storage passage, the housing being opened therein; the blower is configured to pass through the second orifice and enter the storage passage; a wiring hole is provided on a side of the blower; a first attachment structure is provided on an end of an outer peripheral wall of the blower near the first orifice; the housing is provided with a second attachment structure on an inner wall of the storage passage; the blower is configured to be moved and rotated to attach the first attachment structure to the second attachment structure and to connect the wiring hole to the third orifice, so that an electric wire of the blower is electrically connected to the handle via the wiring hole and the third orifice; the blower device includes an inner case, a fixing ring, a fan, and a ceramic heating element, the fan and the fixing ring are fitted within the inner case, the ceramic heating element is fitted within the fixing ring, and the fan is configured to blow air toward the ceramic heating element and out of the second orifice.

2. The fixing ring has a fixing hole, and a fastening groove communicating with the fixing hole is formed in the inner wall of the fixing ring. The ceramic heating element has a cylindrical shape and is inserted into the fixing hole, with its outer circumferential side wall being engaged in the fastening groove.

2. The hair dryer according to claim 1, wherein the inner case includes a first inner case having an annular flange and a second inner case having an annular arc-shaped groove, the second inner case having an annular abutment inside the annular arc-shaped groove, the fixing ring abuts on an end of the annular abutment, the annular flange is fitted in the annular arc-shaped groove, an end of the fixing ring away from the annular abutment abuts on an inner wall of the first inner case, and an outer circumferential side wall of the fixing ring abuts on the annular flange.

3. the first engaging structure includes a plurality of first engaging portions and a plurality of first undercut grooves, the plurality of first engaging portions being alternately arranged with the plurality of first undercut grooves; the second engagement structure includes one annular fixing groove, a plurality of second engagement portions, and a second relief groove, the annular fixing groove communicates with each of the second relief grooves, and the plurality of second engagement portions and the plurality of second relief grooves are alternately provided, The size, shape, and position of the plurality of first locking portions are adapted to fit into the plurality of second undercut grooves, and the size, shape, and position of the plurality of second locking portions are adapted to fit into the plurality of first undercut grooves; When the blower device moves toward the first orifice, each of the first locking portions simultaneously passes through each of the second relief grooves and avoids each of the second locking portions due to the first relief grooves, so that each of the first locking portions is provided within the annular fixing groove; 3. The hair dryer according to claim 2, wherein when all of the first engaging portions are disposed within the annular fixing groove, the blower rotates to bring the first engaging portions into contact with the second engaging portions.

4. 4. The hair dryer of claim 3, wherein the housing has a protrusion on the inner wall of the receiving passage, the first locking portion has an arc-shaped groove formed in the housing toward the inner wall of the receiving passage, the protrusion fits into the arc-shaped groove, and when all the first locking portions are located in the annular fixing groove, the blower rotates to lock the protrusion into the arc-shaped groove.

5. 5. The hair dryer according to claim 4, wherein when the protrusion is engaged in the arc-shaped groove, the wiring hole communicates with the third orifice, and the central axis of the wiring hole is aligned with the central axis of the third orifice.

6. 5. The hair dryer according to claim 4, wherein a fixed cover is provided at an end of the blower device close to the second orifice, and when the blower device passes through the second orifice and enters the accommodating passage, the fixed cover is attached to the outer peripheral wall of the housing.

7. 7. The hair dryer according to claim 6, wherein a locking ring is provided on an inner peripheral wall of the fixed cover, and a locking groove is provided on an outer peripheral wall of the housing, and the locking ring is engaged in the locking groove, thereby locking the fixed cover to the outer peripheral wall of the housing.

8. 8. The hair dryer of claim 7, wherein the locking ring is made of a deformable material, the outer peripheral wall of the housing is provided with an annular convex arc, the annular convex arc is provided on one side of the locking groove, and when the locking ring is engaged in the locking groove, the locking ring presses the annular convex arc through elastic deformation to be engaged in the locking groove.

9. 7. The hair dryer of claim 6, further comprising a nozzle, the nozzle being attached to the fixed cover, the fixed cover having a first ventilation hole communicating with the accommodating passage, the nozzle having a second ventilation hole, and the blower blowing air sequentially through the first ventilation hole and the second ventilation hole.

10. 2. The hair dryer according to claim 1, further comprising a rear cover, the rear cover covering the first orifice, the rear cover having a third ventilation hole communicating with the accommodating passage, and external airflow entering the blower device through the third ventilation hole.

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