A radial structure compact hair dryer

Abstract

This utility model discloses a hair dryer with a compact radial structure. The outer shell of the hair dryer includes a front half shell and a rear half shell that are spliced ​​together. A heat insulation sleeve is fixed inside the outer shell of the hair dryer. The heat insulation sleeve is axially clamped and positioned by the front half shell and the rear half shell, without occupying additional radial space. The outer wall of the heat insulation sleeve and the inner wall of the hair dryer are each provided with radial concave and convex structures that are mutually circumferentially positioned. The convex structure is radially embedded in the concave structure, occupying relatively little radial space. Therefore, the radial structure of the heat insulation sleeve installation structure is compact, and the radial dimension of the hair dryer can be made relatively small.

Description

Technical Field

[0001] This utility model relates to the field of hair dryer technology, specifically to a hair dryer with a compact radial structure of the blower tube. Background Technology

[0002] The hairdryer's outer shell is composed of front and rear halves, with the rear half attached to the front half. A heat insulation sleeve is secured to the front half with screws. Specifically, the screws are screwed axially into the first screw post on the outside of the heat insulation sleeve and the second screw post on the inside of the front half, thus fixing the heat insulation sleeve to the front half. After fixing, the screws and screw posts occupy the radial space between the heat insulation sleeve and the front half. The occupied space is the radial width of the screw plus twice the radial thickness of the screw post, requiring a correspondingly larger radial dimension for the hairdryer. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a hair dryer with a compact radial structure for the heat insulation sleeve installation structure, which allows the radial dimension of the blower tube to be relatively small.

[0004] A hair dryer with a compact radial structure has a duct shell comprising a front half shell and a rear half shell that are spliced ​​together. A heat insulation sleeve is fixed inside the duct shell and is axially clamped and positioned by the front half shell and the rear half shell. The outer wall of the heat insulation sleeve and the inner wall of the duct shell are each provided with radial concave and convex structures that are mutually circumferentially positioned.

[0005] Furthermore, of the two structures, the outer side of the heat insulation sleeve and the inner side of the air duct shell, one is a protrusion and the other is a groove formed by the gap between two radial protrusions. The protrusion is axially inserted into the groove to achieve the circumferential positioning.

[0006] Furthermore, the heat insulation sleeve is assembled from a front sleeve and a rear sleeve, with the middle part of the heat insulation sleeve serving as the mounting part for both of them. Its mounting structure forms a radially stepped outward protrusion. A gap is formed between the heat insulation sleeve and the outer shell of the air duct near the mounting part in the axial direction, and the protrusion and groove are accommodated in the gap.

[0007] Furthermore, the radial dimension of the convex-concave structure is less than 5 mm.

[0008] Furthermore, the concave-convex structure is specifically provided in the front part and the front half shell of the heat insulation sleeve, and the radial dimension of the outer periphery of the rear part of the heat insulation sleeve gradually decreases along the axial direction to the rear, forming an interference fit when embedded in the rear half shell.

[0009] Furthermore, the rear part of the insulation sleeve is cylindrical, with multiple axial ribs arranged around its outer circumference. The ribs gradually thin out along the axial direction and rearward, thereby achieving a gradual decrease in the radial dimension of the outer circumference of the rear part of the insulation sleeve along the axial direction and rearward.

[0010] Furthermore, the front end of the front half shell is provided with a front clamping block in front of the heat insulation sleeve, and the rear end of the rear half shell is provided with a rear clamping block behind the heat insulation sleeve. The front and rear clamping blocks axially clamp the heat insulation sleeve for axial positioning.

[0011] Furthermore, the outer wall of the front end of the heat insulation sleeve is provided with a front recess, and the front clamping block of the front half shell is inserted into the front recess; and / or the outer wall of the rear end of the heat insulation sleeve is provided with a rear recess, and the rear clamping block of the rear half shell is inserted into the rear recess.

[0012] Furthermore, an elastic element is axially clamped between the heat insulation sleeve and the front clamping block to compensate for the axial manufacturing tolerance between the heat insulation sleeve and the air duct shell, and / or an elastic element is axially clamped between the heat insulation sleeve and the rear clamping block to compensate for the axial manufacturing tolerance between the heat insulation sleeve and the air duct shell.

[0013] Furthermore, the front recess is annular, and an elastic collar is axially clamped between the heat insulation sleeve and the front clamping block in the front recess to compensate for the axial manufacturing tolerance between the heat insulation sleeve and the air duct shell; and / or the rear recess is annular, and an elastic collar is axially clamped between the heat insulation sleeve and the rear clamping block in the rear recess to compensate for the axial manufacturing tolerance between the heat insulation sleeve and the air duct shell.

[0014] On the one hand, the front and rear half shells axially clamp the heat insulation sleeve for axial positioning, without requiring additional radial space. On the other hand, circumferential positioning is achieved through a concave-convex structure. The convex structure is radially embedded in the concave structure, occupying relatively little radial space. Therefore, the heat insulation sleeve installation structure is radially compact, and the radial dimension of the air duct can be made relatively small. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of a hair dryer.

[0016] Figure 2 yes Figure 1 A magnified view of a portion of the image, showing a larger area. Figure 1 Part I.

[0017] Figure 3 It's a 3D diagram of a hair dryer's heat insulation sleeve.

[0018] Figure 4 It's a 3D view of the front half of the hair dryer. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to specific embodiments.

[0020] Hair dryer Figure 1 As shown, the front half-shell 21 and the rear half-shell 22 are assembled to form the outer shell 2 of the air duct, and a heat insulation sleeve 1 is fixed inside the outer shell 2. The heat insulation sleeve 1 is shown in [reference needed]. Figure 3It is assembled from a front sleeve 15 and a rear sleeve 16 of a heat insulation sleeve 1. The rear end of the front sleeve 15 forms a snap ring 150 with a snap groove 151. The rear sleeve 16 has a corresponding radially protruding buckle 161. The rear sleeve 16 of the heat insulation sleeve 1 is axially inserted into the snap ring 150 of the front sleeve 15, and then the buckle 161 of the rear sleeve 16 is radially inserted into the snap groove 151 of the front sleeve 15 for fixation. The front sleeve 15 and the rear sleeve 16 are then installed together.

[0021] Heat insulation sleeve 1 (see) Figure 2 Four radially protruding protrusions 10 are provided on the outer side wall of the front sleeve 15, closest to the retaining ring 150. The thickness L of the thickest part of the protrusion 10 is 1 to 5 mm, preferably 2 mm. Specifically, there are one protrusion 10 each on the top, bottom, left, and right sides, arranged symmetrically. The front half shell 21 is correspondingly shown below. Figure 3 The inner wall has four pairs of radially convex ridges, the thickest part of which is 1 to 5 mm, preferably 2 mm. The gap between each pair of radial ridges forms a groove 20, for a total of four grooves 20, specifically one each on the top, bottom, left, and right sides, arranged symmetrically. When the heat insulation sleeve 1 extends axially forward into the front half shell 21, the four protrusions 10 on the heat insulation sleeve 1 respectively engage with the four grooves 20 of the front half shell 21, thus radially embedding into the four grooves 20 of the front half shell 21, occupying relatively little radial space. The protrusions 10 act as convex structures, and the grooves 20 act as concave structures; the two, as convex and concave structures, mutually position each other circumferentially, and after positioning, they cannot produce circumferential relative movement. The outer diameter of the front sleeve 15 of the heat insulation sleeve 1 gradually increases backward, and the snap ring 150 is formed by the radially stepped outward protrusion of the rear end of the front sleeve 15. The snap ring 150 and the buckle 161 serve as the mounting part, located in the middle of the heat insulation sleeve 1, with the largest outer diameter. The inner diameter of the front half shell 21 gradually increases backward along the axial direction, which is a gradual expansion. Therefore, a gap 3 will be formed between the heat insulation sleeve 1 and the front half shell 21 in front of the radially stepped outward protrusion snap ring 150. The protrusion 10 and the groove 20 are accommodated in the gap 3, which basically does not affect the overall radial dimension of the hair dryer. Therefore, the overall outer diameter of the hair dryer does not need to be enlarged as a result.

[0022] Heat insulation sleeve 1 (see) Figure 3 The rear sleeve 16, serving as the rear part of the heat insulation sleeve 1, is cylindrical in shape. Multiple axial ribs 12 are arranged around its outer circumference, gradually thinning towards the rear along the axial direction. Therefore, the radial dimension of the outer circumference of the rear sleeve 16 of the heat insulation sleeve 1 gradually decreases towards the rear along the axial direction. The heat insulation sleeve 1 extends axially rearward into the rear half-shell 22, and the ribs 12 of the rear sleeve 16 are embedded axially rearward into the rear half-shell 22, forming an interference fit.

[0023] See Figure 1The front half-shell 21 has a front clamping block 210 at its front end in front of the heat insulation sleeve 1, and the outer side wall of the front end of the heat insulation sleeve 15 has a corresponding annular front recess 141. The rear half-shell 22 has a rear clamping block 220 at its rear end behind the heat insulation sleeve 1, and the outer side wall of the rear end of the heat insulation sleeve 16 has a corresponding annular rear recess 142. When the front and rear half-shells 21 and 22 move axially relative to each other and are spliced ​​together, the front clamping block 210 sinks into the front recess 141 of the front sleeve 15 of the heat insulation sleeve 1, and the rear clamping block 220 sinks into the rear recess 142 of the rear sleeve 16 of the heat insulation sleeve 1, thereby axially clamping the heat insulation sleeve 1 to achieve axial positioning. An elastic collar 11 is axially clamped between the heat insulation sleeve 1 and the rear clamping block 220 in the rear recess 142. The elastic collar 11 is an elastic element whose elastic deformation compensates for the axial manufacturing tolerances between the heat insulation sleeve 1 and the duct shell 2, allowing the heat insulation sleeve 1 to be axially clamped by the front clamping block 210 of the front half shell 21 and the rear clamping block 220 of the rear half shell 22. Since the front and rear clamping blocks 210 and 220 are located at the front and rear of the heat insulation sleeve 1, they do not require additional radial space, thus allowing the radial dimension of the duct to be relatively small. Because the front and rear clamping blocks 210 and 220 and the elastic collar 11 are all recessed into the front and rear recesses 141 and 142 in the assembled state, they do not require additional axial space.

[0024] The hair dryer disassembly procedure is as follows: disconnect the front half shell 21 from the rear half shell 22, and detach the rear half shell 22 axially forward. The front part of the heat insulation sleeve 1, which is interference-fitted with the rear half shell 22, will then be exposed. The heat insulation sleeve 1 can then be removed from the rear half shell 22, completing the disassembly.

[0025] In this embodiment, a gap 3 is formed between the heat insulation sleeve 1 and the front half shell 21 in front of the radially stepped outward-protruding snap ring 150. In other embodiments, this gap 3 may be formed behind the snap ring 150.

[0026] In this embodiment, an elastic collar 11 is axially clamped between the heat insulation sleeve 1 and the rear clamping block 220 in the rear recess 142 to compensate for the axial manufacturing tolerance between the heat insulation sleeve 1 and the air duct shell 2. In other embodiments, the elastic collar 11 can be axially clamped between the heat insulation sleeve 1 and the front clamping block 210 in the front recess 141 to compensate for the axial manufacturing tolerance between the heat insulation sleeve 1 and the air duct shell 2; or the front elastic collar 11 can be axially clamped between the heat insulation sleeve 1 and the front clamping block 210 in the front recess 141, and the elastic collar 11 can be axially clamped between the heat insulation sleeve 1 and the rear clamping block 220 in the rear recess 142.

Claims

1. A radial structure compact hair dryer, the hair dryer's outer shell comprises a front half shell and a rear half shell which are spliced with each other, and a heat insulation sleeve is fixed inside the outer shell, characterized in that: The heat insulation sleeve is axially clamped and positioned by the front half shell and the rear half shell; the outer wall of the heat insulation sleeve and the inner wall of the air duct shell are each provided with radial concave and convex structures for mutual circumferential positioning.

2. The hair dryer of claim 1, wherein: The heat insulation sleeve has an outer concave-convex structure, and the air duct shell has an inner concave-convex structure. One of them is a protrusion, and the other is a groove formed by the gap between two radial protrusions. The protrusion is axially inserted into the groove to achieve the circumferential positioning.

3. The hair dryer of claim 2, wherein: The heat insulation sleeve is assembled from a front sleeve and a rear sleeve. The middle part of the heat insulation sleeve is the mounting part of the two sleeves, and its mounting structure forms a radially stepped outward protrusion. A gap is formed between the heat insulation sleeve and the outer shell of the air duct in the axial direction near the mounting part in front of or behind the mounting part, and the protrusion and groove are accommodated in the gap.

4. The hair dryer of claim 1, wherein: The radial dimension of the concave-convex structure is less than 5 mm.

5. The hair dryer of claim 1, wherein: The concave-convex structure is specifically set in the front part and the front half shell of the heat insulation sleeve. The radial dimension of the outer periphery of the rear part of the heat insulation sleeve gradually decreases along the axial direction and rearward, forming an interference fit when embedded in the rear half shell.

6. The hair dryer of claim 5, wherein: The rear part of the insulation sleeve is cylindrical, with multiple axial ribs arranged around its outer circumference. The ribs gradually thin out along the axial direction and rearward, thereby achieving a gradual decrease in the radial dimension of the outer circumference of the rear part of the insulation sleeve along the axial direction and rearward.

7. The hair dryer of claim 1, wherein: The front half of the shell has a front clamping block in front of the heat insulation sleeve, and the rear half of the shell has a rear clamping block behind the heat insulation sleeve. The front and rear clamping blocks clamp the heat insulation sleeve axially for axial positioning.

8. The hair dryer of claim 7, wherein: The outer wall of the front end of the heat insulation sleeve is provided with a front recess, and the front clamping block of the front half shell is inserted into the front recess; and / or the outer wall of the rear end of the heat insulation sleeve is provided with a rear recess, and the rear clamping block of the rear half shell is inserted into the rear recess.

9. The hair dryer of claim 7, wherein: An elastic element is axially clamped between the heat insulation sleeve and the front clamping block to compensate for the axial manufacturing tolerance between the heat insulation sleeve and the air duct shell, and / or an elastic element is axially clamped between the heat insulation sleeve and the rear clamping block to compensate for the axial manufacturing tolerance between the heat insulation sleeve and the air duct shell.

10. The hair dryer of claim 8, wherein: The front recess is annular, and an elastic collar is axially clamped between the heat insulation sleeve and the front clamping block in the front recess to compensate for the axial manufacturing tolerance between the heat insulation sleeve and the air duct shell; and / or the rear recess is annular, and an elastic collar is axially clamped between the heat insulation sleeve and the rear clamping block in the rear recess to compensate for the axial manufacturing tolerance between the heat insulation sleeve and the air duct shell.

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