Connecting-fixing structure for a power cord and hair treatment appliance

A connecting-fixing structure, used for detachably connecting a main body of an electrical appliance with a power cord, includes a connection end, a locking member, and a rotating sleeve. The locking member includes a supporting shaft and a locking portion which rotates by the supporting shaft as a fulcrum. A locking fitting portion is disposed on the tail end of the power cord and adapted to the locking portion. Furthermore, a rotating sleeve is rotatably sleeved on the connection end, an inner wall of the rotating sleeve has a driving part, and the rotating sleeve rotates to drive the driving part to further drive the locking portion to rotate, thereby locking the locking portion or unlocking the locking portion from the locking fitting portion. The power cord can be disassembled and assembled only by rotating the rotating sleeve, and the operation is convenient, and the structure is simple.

RELATED APPLICATIONS

This application claims the benefit of priority to Chinese Utility Model Application No. 202022934700.1 filed on Dec. 9, 2020, which is hereby incorporated by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates to the technical field of connecting and fixing of a power cord and an electric appliance body, more particularly to connecting-fixing structure for a power cord and a main body and a hair treatment appliance.

BACKGROUND OF THE INVENTION

Many electrical appliances, such as curling irons, hair straighteners, hair straightening combs, and electric air combs, are generally equipped with pluggable power cords. After the power cords are inserted into the electrical appliances, the power cords are fixed with the main body of the electrical appliances through a detachable fixing structure to facilitate use and replacement. At present, the power cords on electrical appliances are fixed by buckles, or fixed by screws and fixtures, although these fixing structures can detachably fix the power cords, which are inconvenient to operate and time-consuming to disassemble and assemble the power cords to the electrical appliances.

SUMMARY OF THE INVENTION

One objective of the present invention is to provide a connecting-fixing structure which is convenient for disassembly and assembly a power cord and an electrical appliance.

Another objective of the present invention is to provide a hair treatment appliance which is convenient for disassembly and assembly its power cord.

To achieve the above objective, a connecting-fixing structure, used for detachably connecting a main body of an electrical appliance with a power cord, is provided. The connecting-fixing structure includes a connection end, a locking member, and a rotating sleeve. The connection end is arranged at a tail end of the main body and has a cylindrical structure, and a tail end of the power cord passes through a cavity of the connection end and further plugs into the connection end. The locking member includes a locking piece which is provided with a supporting shaft and a locking portion on one side of the supporting shaft. The locking portion is capable of rotating by the supporting shaft as a fulcrum, and a locking fitting portion is disposed on the tail end of the power cord and adapted to the locking portion. An outer wall of the connection end is opened with an accommodating groove that is communicated with the cavity of the connection end and fits the locking member, and the locking member is mounted in the accommodating groove and pivotally connected to a side wall of the accommodating groove through the supporting shaft. Furthermore, a rotating sleeve is rotatably sleeved on the connection end, an inner wall of the rotating sleeve is provided with a driving part, and the rotating sleeve is rotated to drive the driving part to further drive the locking member to rotate, thereby locking the locking portion or unlocking the locking portion from the locking fitting portion.

Preferably, a bottom surface of the locking piece is an arc-shaped surface, and the curvature of the bottom surface fits an outer wall of the power cord.

Preferably, the bottom surface of the locking piece includes a first end and a second end. The longitudinal distance between the first end and the supporting shaft is greater than the longitudinal distance between the second end and the supporting shaft. The locking portion is disposed at the first end, and the locking fitting portion is an engaging groove capable of engaging with the locking portion.

Preferably, the horizontal distance between the supporting shaft and the first end is greater than the horizontal distance between the supporting shaft and the second end.

Preferably, a top surface of the locking piece is an arc-shaped surface, and the driving part is a protrusion protruding toward the inside of the rotating sleeve. A pressing surface matching the top surface of the locking piece is provided on a side of the driving part away from the inner wall of the rotating sleeve.

Preferably, the distance between one end of the pressing surface facing to the first end and the inner wall of the rotating sleeve is greater than the distance between the other end of the pressing surface and the inner wall of the rotating sleeve.

Preferably, one of the outer wall of the connection end and the inner wall of the rotating sleeve is provided with several sliding grooves, the other of the outer wall of the connection end and the inner wall of the rotating sleeve is provided with a clamping portion corresponding to the sliding grooves, and the clamping portion is rotated along the sliding grooves.

Preferably, a limiting plate for blocking the driving part is respectively disposed on the outer wall of the connection end at both ends of the accommodating groove.

Preferably, two locking members are oppositely provided on the connection end, and two driving parts respectively corresponding to the two locking members are provided on the rotating sleeve.

Furthermore, a hair treatment appliance includes a main body and a power cord. The main body is provided with a connection end for plugging-in the power cord, and the power cord is detachably connected with the main body through the above-mentioned connecting-fixing structure.

In comparison with the prior art, the connecting-fixing structure of the power cord uses the locking member and the rotating sleeve to fix the power cord. The locking member is provided with a supporting shaft and a locking portion capable of rotating with the supporting shaft as a fulcrum. An inner wall of the rotating sleeve is provided with a driving part, and a tail end of the power cord is provided with a locking fitting portion that is adapted to the locking portion. Therefore, by rotating the rotating sleeve, the driving part on the rotating sleeve will drive the locking portion to rotate with the support shaft as the fulcrum, so that the locking portion on the locking member is engaged with or separated from the locking fitting portion on the power cord to lock or unlock the power cord. It can be seen that, by using the connecting-fixing structure of the power cord, the power cord can be disassembled and assembled only by rotating the rotating sleeve, and the operation is convenient and safe, and the structure is simple.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

A distinct and full description of the technical solution of the present invention will follow by combining with the accompanying drawings.

As shown inFIGS.1to6, a hair treatment appliance is provided which includes a main body1and a power cord2. The main body1is provided with a connection end30for plugging-in the power cord2. The power cord2is detachably connected with the main body1through a connecting-fixing structure to disassemble and assemble the power cord2easily. Specifically, the hair treatment appliance in this embodiment is described with a hair straightener as an example, but it is not limited to this. The connecting-fixing structure includes a connection end30, a locking member31, and a rotating sleeve32.

As shown inFIGS.2and3, the connection end30is arranged at a tail end of the main body1and has a cylindrical structure. In this embodiment, the connection end30is integrally formed with the main body1of the hair straightener, and a tail end of the power cord2can pass through a cavity300of the connection end30and further plug into the connection end30to transmit a power signal to the main body1of the hair straightener. As shown inFIGS.6and7, the locking member31includes a locking piece310which is provided with a supporting shaft311and a locking portion312on one side of the supporting shaft311. The locking portion312can rotate with the supporting shaft311as a fulcrum. As shown inFIG.4, the tail end of the power cord2is provided with a locking fitting portion20that is adapted to the locking portion312. When the locking member31is rotated so that the locking portion312and the locking fitting portion20are engaged together, the power cord2is locked; alternatively, when the locking member31is rotated to make the locking portion312disengage from the locking fitting portion20, the power cord2is unlocked.

As shown inFIG.3, in order to facilitate the mounting of the locking member31, an outer wall of the connection end30is provided with an accommodating groove301that fits the locking member31and communicates with the cavity300of the connection end30. The locking member31is mounted in the accommodating groove301and pivotally connected to a side wall of the accommodating groove301through the supporting shaft311.

As shown inFIGS.5and9, the rotating sleeve32is rotatably sleeved on the connection end30. An inner wall of the rotating sleeve32is provided with a driving part320, and the rotating sleeve32rotates to drive the driving part320to further drive the locking member31to rotate, so that the locking portion312is locked or unlocked from the locking fitting portion20.

Through the above-mentioned connecting-fixing structure, the power cord2can be disassembled and assembled only by rotating the rotating sleeve32in a forward or reverse rotation, which is convenient and safe, has a simple structure, reduces many power lines and avoids line entanglement. More specifically, as shown inFIG.7, a bottom surface313of the locking piece310is an arc-shaped surface, and the bottom surface313is aligned with an outer wall of the power cord2. In this way, when the locking portion312on the locking member31is locked with the locking fitting portion20on the power cord2, the arc-shaped bottom surface313is attached to the outer wall of the power cord2to fix the power cord2. Preferably, as shown inFIGS.6-8, the bottom surface313includes a first end315and a second end316. The longitudinal distance L1between the first end315and the supporting shaft311is greater than the longitudinal distance L2between the second end316and the supporting shaft311. The locking portion312is disposed at the first end315, and the locking fitting portion20is an engaging groove capable of engaging with the locking portion312. In this embodiment, when the power cord2needs to be fixed, the rotating sleeve32is rotated to drive the locking member31to rotate, so that the locking portion312is inserted into the engaging groove on the power cord2to lock the locking member31and the power cord2together. When the power cord2needs to be unlocked, the rotating sleeve32is rotated in the reverse direction, and the locking member31is driven to reverse, so that the locking portion312on the locking member31is separated from the engaging groove on the power cord2to unlock the power cord2.

As shown inFIG.8, in order to ensure the sensitive operation of the locking member31and enhance simultaneously the contact area between the bottom surface313of the locking piece310and the power cord2, the horizontal distance L3between the supporting shaft311and the first end315is greater than the horizontal distance L4between the supporting shaft311and the second end316. That is, the supporting shaft311is eccentrically arranged, so that the locking member31rotates a small angle towards the locking portion312to lock the power cord2. Moreover, when the locking portion312is engaged with the engaging groove, the bottom surface313of the locking piece310has a larger contact area with the power cord2.

As a further improvement, as shown inFIGS.6and9, a top surface314of the locking piece310is an arc-shaped surface. The driving part320is a protrusion protruding toward the inside of the rotating sleeve32. A pressing surface321matching the top surface314of the locking piece310is provided on the side of the driving part320away from an inner wall of the rotating sleeve32. In this embodiment, the contact surface between the locking piece310and the driving part320is an arc-shaped surface that matches each other. Thus, when the user rotates the rotating sleeve32, the rotation is smoother, and the locking member31is more sensitive. Preferably, the distance between tone end of the pressing surface321facing to the first end315and the inner wall of the rotating sleeve32is greater than the distance between the other end of the pressing surface321and the inner wall of the rotating sleeve32. That is to say, the overall structure of the driving part320is substantially the same as the overall contour structure of the locking piece310.

As a further improvement, as shown inFIGS.3and9, in order to facilitate the rotation of the rotating sleeve32and fixing the rotating sleeve32at a certain rotating position, one of the outer wall of the connection end30and the inner wall of the rotating sleeve32is provided with several sliding grooves302, and the other of the outer wall of the connection end30and the inner wall of the rotating sleeve32is provided with a clamping portion322corresponding to the sliding grooves302. Specifically, the clamping portion322can be rotated step by step along the sliding grooves302. In this embodiment, as shown in theFIGS.3and9, the sliding grooves302are provided on the inner wall of the rotating sleeve32, and the clamping portion322is provided on the outer wall of the connection end30. When the rotating sleeve32is rotated, the clamping portion322can be rotated step by step along the sliding grooves302under the action of the rotation force. When the rotating sleeve32is rotated to lock and unlock the power cord2, the user overcomes the sliding friction between the clamping portion322and the sliding grooves302, so that the clamping portion322continuously slides on the sliding grooves302.

In addition, in order to limit the rotation space of the rotating sleeve32, a limiting plate303for blocking the driving part320is respectively disposed on the outer wall of the connection end30at both ends of the accommodating groove301. Thus, the rotation space of the rotating sleeve32is defined by the driving part320on the rotating sleeve32and the two limiting plates303. Thus, when the rotating sleeve32rotates to a limit position in one direction, the driving part320on the rotating sleeve32abuts against one of the limiting plates303on the corresponding end of the accommodating groove301to prevent the rotating sleeve32from further rotating. When the rotating sleeve32reverses to the other direction to another limit position, the driving part320on the rotating sleeve32abuts against the other limiting plate303on the other end of the accommodating groove301to prevent the rotating sleeve32from further rotating.

Furthermore, please refer toFIG.5again, as a further improvement, two locking members31are oppositely provided on the connection end30, and two driving parts320respectively adapted to the two locking members31are provided on the rotating sleeve32.

Therefore, as shown inFIGS.1to9, the hair treatment appliance disclosed in the present invention is provided with the connecting-fixing structure which includes the locking member31and the rotating sleeve32. The locking member31is mounted on the outer wall of the connection end30on the end of the hair treatment appliance, and the power cord2is provided with an engaging groove that matches the locking portion312on the locking member31. When the user assembles the power cord2, firstly, the power cord2is inserted through the cavity300of the connection end30and connected to the connection end30in the hair treatment appliance. Then, the rotating sleeve32is rotated to drive the two locking members31to rotate, so that the locking portions312on the two locking members31are engaged with the engaging grooves on the power cord2to lock the power cord2. When the power cord2needs to be removed, the rotating sleeve32is rotated in the opposite direction, so that the two locking members31rotate in the opposite direction, so that the locking portions312on the locking members31are separated from the engaging grooves on the power cord2, thereby unlocking the power cord2.