US20090014576A1

US20090014576A1 - Device for reeling and unreeling a power supply line

Info

Publication number: US20090014576A1
Application number: US11/894,966
Authority: US
Inventors: Huibo Jiang
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-07-13
Filing date: 2007-08-22
Publication date: 2009-01-15
Also published as: CN201113024Y; JP3136613U

Abstract

A device for unidirectionally reeling and unreeling a power supply line includes: an upper bearing; a lower bearing; an upper cover; a lower cover; a rotary disc; a plug; a coil spring installed in the coil spring receiving space, on an outer wall of which a plurality of reeling-unreeling control grooves arranged uniformly; a clip body being installed on the rotary disc and used for clipping the power supply line; a conductive unit located in the clip body; and a reeling-unreeling control assembly installed on the lower cover for controlling a reeling-unreeling length of the power supply line. The device for reeling and unreeling a power supply line can be unreeled unidirectionally, can adapt to different voltages and apply to two-core or three-core power supply line, as well as has high safety.

Description

FIELD OF THE TECHNOLOGY

The present invention relates to a device for reeling and unreeling a power supply line, and more particularly, to a device for unidirectionally reeling and unreeling a power supply line.

BACKGROUND OF THE TECHNOLOGY

In related art, a power supply line for electrically connecting home appliances or office appliances, especially variable portable appliances such as a notebook, to a power supply is used by the following two modes: 1) one end of the power supply line with a certain length is connected to the appliances and the other end thereof is connected to a plug for electrically connecting to a socket when using the appliances; 2) a device for reeling and unreeling a power supply line is used to reel the power supply line for electrically connecting the appliances to the socket. In the first mode, the power supply line is in a state of disorder, and the power supply line tends to be contaminated and then becomes dirty. Since the length of the power supply line in the first mode is invariable, the power supply line can not adapt to the requirement of variable distances. Thus the device in the first mode is inconvenient and unsafe.
In the second mode, the variable devices for reeling and unreeling a power supply line in the prior art have mainly the following disadvantages:
1. Most of the present devices for reeling and unreeling a power supply line are designed to be unreeled bidirectionally, and the bidirectionally unreeled portions of the power supply line have equal length, thereby the present devices can not meet the requirement of unidirectionally unreeling one end of the power supply line.
2. Most of the present devices for reeling and unreeling a power supply line are designed to automatically and bidirectionally reel the power supply lines, which may result that the devices automatically reel the power supply lines when being occasionally touched, thus the appliances may be damaged or switched off suddenly.
3. Most of the present devices for reeling and unreeling a power supply line can only be applied to related light-current products, due to the limited space of the present devices and a required toughness of the power supply line. Even though some of the devices can be used in heavy-current products, the volumes of these devices are too large to be convenient to carry.
4. A clip means of the devices for reeling and unreeling a power supply line are abraded after a period of usage, thus the devices would become unusable, which would cause great waste.
Aiming at the above-mentioned disadvantages of the present devices for reeling and unreeling a power supply line, the designer developed a new type device for unidirectionally reeling and unreeling a power supply line.

SUMMARY

A device for reeling and unreeling a power supply line so as to eliminate the above-mentioned disadvantages in the prior art is provided. Concretely, the device can apply to portable appliances or other productions used at different voltages by unidirectionally unreeling and freely controlling the power supply line therein. Thus it is convenient to use.
One embodiment of a device for unidirectionally reeling and unreeling a power supply line, includes: an upper bearing and a lower bearing; an upper cover formed with an upper bearing installation boring for installing the upper bearing and an outlet for reeling or unreeling the power supply line; a lower cover formed with a lower bearing installation boring for installing the lower bearing and a reeling-unreeling control assembly installation boring; a rotary disc formed with a coil spring receiving space on one side thereof and a cylinder-like reeling post at a center portion of the other side thereof and supported by the upper bearing and the lower bearing rotatably, a plurality of reeling-unreeling control grooves being uniformly arranged on an outer wall of the coil spring receiving space, and the power supply line being reeled on the reeling post; a plug connected to one end of the power supply line; a coil spring installed in the coil spring receiving space; a clip body for clipping the power supply line; a conductive unit located in the clip body; and a reeling-unreeling control assembly installed in the reeling-unreeling control assembly installation boring of the lower cover and used for controlling a reeling-unreeling length of the power supply line.
The conductive unit may include: an upper electrode pole electrically connected to one core of the power supply line and located in the upper bearing; a lower electrode pole electrically connected to the other core of the power supply line and located in the lower bearing; and an insulator provided between the upper electrode pole and the lower electrode pole.
The upper electrode pole, the lower electrode pole and the insulator may be provided in the clip body by injection molding.
The conductive unit may include: a grounding metal shaft; an upper insulator provided around an upper part of the grounding metal shaft; an upper electrode sleeve provided around the upper insulator, electronically connected to one core of the power supply line and located in the upper bearing; a lower insulator provided around a lower part of the grounding metal shaft; a lower electrode sleeve provided around the lower insulator, electronically connected to the other core of the power supply line and located in the lower bearing.
The grounding metal shaft, the upper insulator, the upper electrode sleeve, the lower insulator and the lower electrode sleeve may be provided in the clip body by injection molding.
The reeling-unreeling control assembly may further include an elastic mechanism; and the reeling-unreeling control assembly is fixed on the lower cover by screw connection or snap-fit connection.
The elastic mechanism may be a torsion spring.
A sliding surface for guiding may be formed between any two adjacent reeling-unreeling control grooves uniformly arranged on the outer wall of the coil spring receiving space.
The upper cover and the lower cover may be fixed together by snap-fit connection or screw connection.
The upper cover and the lower cover may be formed integrally by ultrasonic molding.
The device for reeling and unreeling a power supply line can overcome some of the above-mentioned disadvantages existing in the prior art. The device can apply to portable appliances or other productions used at different voltages by unidirectionally reeling and unreeling the power supply line and freely controlling the power supply line therein. Thus it is convenient to use. In addition, the power supply line can be fixed better and the reeling-unreeling operation may be controlled by manual, which can obviously improve safety. The device for reeling and unreeling a power supply line can adapt to different voltages and can apply to two-core or three-core power supply line.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic perspective exploded view of the first embodiment of the device for reeling and unreeling a power supply line;

FIG. 2 is a schematic perspective view of an upper cover and a rotary disc of the first embodiment of the device for reeling and unreeling a power supply line;

FIG. 3 is a schematic perspective view of a lower cover and a reeling-unreeling control assembly of the first embodiment of the device for reeling and unreeling a power supply line;

FIG. 4 is a sectional view of the first embodiment of the device for reeling and unreeling a power supply line;

FIG. 5 is a schematic perspective explosed view of the second embodiment of the device for reeling and unreeling a power supply line; and

FIG. 6 is a sectional view of the second embodiment of the device for reeling and unreeling a power supply line.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Referring to a first embodiment of a device for reeling and unreeling a power supply line shown in FIGS. 1-4, the device for reeling and unreeling a power supply line is a device for unidirectionally reeled and unreeled a power supply line, and includes an upper bearing 2 and a lower bearing 9; an upper cover 1 formed with an upper bearing installation boring 13 for installing the upper bearing 2 and an outlet 12 for reeling and unreeling the power supply line 5; a lower cover 10 formed with a lower bearing installation boring 101 for installing the lower bearing 9 and a reeling-unreeling control assembly installation boring 102; a rotary disc 7 formed with a coil spring receiving space 73 on one side thereof and a cylinder-like reeling post 71 at a center portion of the other side thereof and supported by the upper bearing 2 and the lower bearing 9 rotatably, a plurality of reeling-unreeling control grooves 731 being uniformly arranged on an outer wall of the coil spring receiving space 73, and the power supply line 5 being reeled on the reeling post 71; a plug 6 connected to one end of the power supply line 5; a coil spring 8 installed in the coil spring receiving space 73; a clip body 4 for clipping the power supply line 5 and provided with stoppers 41 for fixing the clip body 4 in the reeling post 71, in which the stoppers 41 are corresponding to and installed in clip grooves 72 formed on the reeling post 71; a conductive unit 3 located in the clip body 4; and a reeling-unreeling control assembly 11 installed in the reeling-unreeling control assembly installation boring 102 of the lower cover 10 for controlling a reeling-unreeling length of the power supply line 5.
Preferably, the conductive unit 3 includes an upper electrode pole 31 electrically connected to one core of the power supply line 5 and located in the upper bearing 2; a lower electrode pole 33 electrically connected to the other core of the power supply line 5 and located in the lower bearing 9; and an insulator 32 provided between the upper electrode pole 31 and the lower electrode pole 33.
Preferably, the upper electrode pole 31, the lower electrode pole 33 and the insulator 32 are provided in the clip body 4 by injection molding. Firstly, the upper electrode pole 31, the lower electrode pole 33 and the insulator 32 are formed integrally to one piece by injection molding, such that the insulator 32 is firmly located between the upper electrode pole 31 and the lower electrode pole 33. Then, the piece and the clip body 4 are formed integrally by injection molding. Of course, the electrode pole 31, the lower electrode pole 33, the insulator 32 and the clip body 4 can be combined together by other methods.
Referring to a second embodiment of a device for reeling and unreeling a power supply line shown in FIGS. 5 and 6, a conductive unit 30 includes a grounding metal shaft 303 connected to a ground wire; an upper insulator 302 provided around an upper part of the grounding metal shaft 303; an upper electrode sleeve 301 provided around the upper insulator 302, electronically connected to one core of the power supply line 5 and located in the upper bearing 2; a lower insulator 304 provided around a lower part of the grounding metal shaft 303; a lower electrode sleeve 305 provided around the lower insulator 304, electronically connected to the other core of the power supply line 5 and located in the lower bearing 9.
Preferably, the grounding metal shaft 303, the upper insulator 302, the upper electrode sleeve 301, the lower insulator 304 and the lower electrode sleeve 305 are provided in the clip body 4 by injection molding.
Preferably, the reeling-unreeling control assembly 11 can be installed on the lower cover 10 by screw connection with a screw 113 or snap-fit connection. Additionally, the reeling-unreeling control assembly 11 further includes a torsion spring 111 and a rotatable control element 112. The control element 112 could be used as a ratchet pawl for engaging with the reeling-unreeling control grooves 731. Thus, the reeling-unreeling control assembly 11 can control the reeling-unreeling length of the power supply line 5.
Preferably, a sliding surface 732 for guiding may be formed between any two adjacent reeling-unreeling control grooves 731 uniformly arranged on the outer wall of the coil spring receiving space 73.
Preferably, the upper cover 1 and the lower cover 10 are fixed together by snap-fit connection or screw connection, or formed integrally by ultrasonic molding.
The device for reeling and unreeling a power supply line can overcome some of the above-mentioned disadvantages existing in the prior art. The device can be used in portable appliances or other productions used at different voltages by unidirectionally unreeling and freely controlling the power supply line therein. Thus it is convenient to use. In addition, the power supply line can be fixed better and the reeling-unreeling operation may be controlled by manual, thus can obviously improve safety. The device for reeling and unreeling a power supply line can adapt to different voltages and can apply to two-core or three-core power supply line.
The contents disclosed in the present application are only two preferable embodiments. All changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A device for unidirectionally reeling and unreeling a power supply line, including:

an upper bearing and a lower bearing;

an upper cover formed with an upper bearing installation boring for installing the upper bearing and an outlet for reeling or unreeling the power supply line;

a lower cover formed with a lower bearing installation boring for installing the lower bearing and a reeling-unreeling control assembly installation boring;

a rotary disc formed with a coil spring receiving space on one side thereof and

a cylinder-like reeling post at a center portion of the other side thereof and supported by the upper bearing and the lower bearing rotatably, a plurality of reeling-unreeling control grooves being uniformly arranged on an outer wall of the coil spring receiving space, and the power supply line being reeled on the reeling post;

a plug connected to one end of the power supply line;

a coil spring installed in the coil spring receiving space;

a clip body being installed on the rotary disc and used for clipping the power supply line;

a conductive unit located in the clip body; and

a reeling-unreeling control assembly installed in the reeling-unreeling control assembly installation boring of the lower cover and used for controlling a reeling-unreeling length of the power supply line.

2. The device for unidirectionally reeling and unreeling a power supply line according to claim 1, wherein the conductive unit includes:

an upper electrode pole electrically connected to one core of the power supply line and located in the upper bearing;

a lower electrode pole electrically connected to the other core of the power supply line and located in the lower bearing; and

an insulator provided between the upper electrode pole and the lower electrode pole.

3. The device for unidirectionally reeling and unreeling a power supply line according to claim 1, wherein the conductive unit includes:

a grounding metal shaft;

an upper insulator provided around an upper part of the grounding metal shaft;

an upper electrode sleeve provided around the upper insulator, electronically connected to one core of the power supply line and located in the upper bearing;

a lower insulator provided around a lower part of the grounding metal shaft;

a lower electrode sleeve provided around the lower insulator, electronically connected to the other core of the power supply line and located in the lower bearing.

4. The device for unidirectionally reeling and unreeling a power supply line according to claim 2, wherein the upper electrode pole, the lower electrode pole and the insulator are provided in the clip body by injection molding.

5. The device for unidirectionally reeling and unreeling a power supply line according to claim 3, wherein the grounding metal shaft, the upper insulator, the upper electrode sleeve, the lower insulator and the lower electrode sleeve are provided in the clip body by injection molding.

6. The device for unidirectionally reeling and unreeling a power supply line according to claim 1, wherein the reeling-unreeling control assembly further includes an elastic mechanism; and the reeling-unreeling control assembly is fixed on the lower cover by screw connection or snap-fit connection.

7. The device for unidirectionally reeling and unreeling a power supply line according to claim 6, wherein the elastic mechanism is a torsion spring.

8. The device for unidirectionally reeling and unreeling a power supply line according to claim 1, wherein a sliding surface for guiding is formed between any two adjacent reeling-unreeling control grooves uniformly arranged on the outer wall of the coil spring receiving space.

9. The device for unidirectionally reeling and unreeling a power supply line according to claim 1, wherein the upper cover and the lower cover are fixed together by snap-fit connection or screw connection.

10. The device for unidirectionally reeling and unreeling a power supply line according to claim 1, wherein the upper cover and the lower cover are formed integrally by ultrasonic molding.