EP3754794B1

EP3754794B1 - Telescopic power supply track

Info

Publication number: EP3754794B1
Application number: EP20180695.7A
Authority: EP
Inventors: Lei Fang; Jianguo Dong; Kai Xu; Jun Yang
Original assignee: Ningbo Self Electronics Co Ltd; Self Electronics Germany GmbH
Current assignee: Ningbo Self Electronics Co Ltd; Self Electronics Germany GmbH
Priority date: 2019-06-21
Filing date: 2020-06-18
Publication date: 2024-03-13
Anticipated expiration: 2040-06-18
Also published as: EP3754794A1; CN110375283A

Description

RELATED APPLICATION

This application claims priority to a Chinese Patent Application No. CN 201910546390.5, filed on June 21, 2019 .

FIELD OF THE TECHNOLOGY

The present invention relates to the field of lighting technology, with particular emphasis on a telescopic power supply track.

BACKGROUND OF THE INVENTION

When installing lamps on shelves in supermarkets, shopping malls and other occasions, the power supply wires need to be led out from the back of the shelf and routed along the side brackets under the shelves and then connected to the lights. The power wires are mainly fixed on the laminate bracket by the wire buckle with magnet.
In the prior art, the width of the shelf layer is often adjusted, which causes the installation position of the luminaries to change accordingly, so that the length of the wire must be adjusted to meet the requirements of the installation position of the luminaries, which will increase the workload of the cable management. At the same time, because the power supply conductors of the existing design are exposed, a certain length of wires needs to be reserved during installation for subsequent adjustment and utilization, which affects the appearance.
US 4 046 448 A discloses a lighting fixture accessory device extensible to various lengths comprising: an inner tubular housing and an outer tubular housing of predetermined length, said inner tubular housing being of such diameter as to telescopingly fit within said outer housing, said outer housing terminating at a first end in at least two spaced, inwardly extending lips, said lips being slidably retained in at least two grooves extending longitudinally from a first end of said inner housing, along a portion of said inner housing, said lips and grooves cooperating to prevent relative rotation of said inner and outer housings during telescoping movement thereof; an outwardly extending threaded standard male fitting adapted to fit a standard electrical receptacle extending from a second end of one of said tubular housings; a standard female threaded electric socket extending outwardly from a second end of said other housing and connectable to the male fitting of a similar accessory device whereby a plurality of such devices may be releasably coupled together; electrically conductive interconnections within said inner and outer telescoping housings extending between said fitting and said socket, said interconnections comprising a first pair of rectangular metallic bars affixed at one end in a cantilever manner to an insulated support adjacent said fitting, said first bars having free ends and extending in parallel relation within one of said housings, and a second pair of rectangular metallic bars affixed at one end in a cantilever manner to an insulated support adjacent said receptacle, said second bars having free ends and extending in parallel relation within the other of said housings, said first bars each having their free end portions formed into a sleeve for sliding contact with one of said second bars, said electrical interconnection being prevented from losing contact with each other during rotation of said device due to said cooperation of said lips and grooves.
CN 109 167 224 A discloses a shelf power taking system, comprising a power supply guide rail, a power input part connected with the power supply guide rail and a power intake part arranged on the power supply guide rail, wherein, the power supply guide rail comprises a rail groove, a metal guide rail arranged in the rail groove, and the power input part is electrically connected with one end of the metal guide rail; The power take-off component comprises a magnet block and a conductive contact arranged around the magnet block. When the power take-off component is arranged on the power supply guide rail, the magnet block is attracted to the metal guide rail and the conductive contact is in contact with the metal guide rail. The device has the advantages of simple structure, convenient assembly and better personalized design.

BRIEF SUMMARY OF THE INVENTION

In view of the above problems, an object of the present invention is to provide a telescopic power supply track that can be adjusted in length according to changes in the width of the laminate and the position of the lamp, and is convenient to operate and has a beautiful appearance.
In order to achieve the above object, the technical solution of the present invention is: a telescopic power supply track comprises housing with a hollow cavity, and a sliding device with one end extending into the cavity of the housing and slidingly connected to the housing;
the housing is provided with an input wire at one end and an output wire at the other end, the sliding device is electrically connected to the input wire and the output wire respectively, and the extension length of the output wire relative to the housing changes accordingly during the sliding of the sliding device along the length direction of the housing;
the sliding device comprises a casing that extends into the cavity of the housing at one end and can move along the length direction of the housing, and a power taking component that is cooperatively connected to the casing, and the power taking component is electrically connected to the input wire and the output wire respectively, and the output wire extends from other end of the casing.
A first group of embodiments of the invention is characterized in that the power taking component includes two conductive terminals. Two opposite inner side walls of the housing are provided with power strips respectively connected with positive and negative poles of the input lead, and the conductive terminals are in corresponding contact with the power strip,
and in that the casing is an insulated hard tube, the conductive terminals are disposed on one end of the insulated hard tube located in the housing by encapsulation, and the output wire is placed in the insulated hard tube and extends out from other end of the insulated hard tube.
In preferred embodiments of the first group, two ends of the housing are provided with closed end covers respectively, and the input wire and the casing respectively extend into the housing through the end covers on the corresponding sides.
In preferred embodiments of the second group, a convex block is formed on the casing near the conductive terminal, and the convex block can abut against the corresponding end cover to limit the casing when the casing slides.
A second group of embodiments of the invention is characterized in that the power taking component comprises two power strips, and two conductive terminals respectively electrically connected to the positive and negative poles of the input wires are fixed on the inner wall of the housing, and the conductive terminals are in corresponding contact with the power strips,
and the casing is provided with a groove formed along the length direction of the casing and capable of accommodating the conductive terminal, and the power strips are distributed on both inner side walls of the groove.
In preferred embodiments of the second group, the housing is provided with a fixed block, and the conductive terminals are distributed on both sides of the fixed block, and the inner wall of the housing is further provided with a power transmission strip connected to the input wire and supplying power to the conductive terminal.
In preferred embodiments of the second group, one end of the casing is provided with a limit block and this end of the casing is located in the housing when using, and the limit block abuts against the fixed block to limit the casing when the casing slides.
In preferred embodiments of the second group, one end of the housing and other end of the casing are respectively provided with sealed end covers, and the input wire extends into the housing passing through the corresponding end covers, and the output wire extends into the casing passing through the corresponding end cover and is connected to the power strip.
In preferred embodiments of both groups, a magnetic block is provided on the end cover and the housing is fixed on a to-be-installed surface through the magnetic block.
In preferred embodiments of both groups, the output wire is provided with a wire buckle.
Compared with the prior art, the advantage of the present invention is that: the telescopic power supply track of the invention can replace the power supply wire which is exposed and reserved with a certain length in the prior art, and is applicable to different shelf widths. When installing the lamp, the extension length of the output wire relative to the power supply track can be changed by adjusting the sliding device of the power supply track, thereby meeting the different length requirements of the power supply wire, avoiding the troublesome cable management of the traditional design, and the operation is very convenient; most of the wires are located inside the power supply track, which makes the whole device neat and beautiful.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an embodiment (first group) of a telescopic power supply track of the present invention.
FIG. 2 is a schematic diagram of the explosion structure of FIG. 1.
FIG. 3 is a schematic diagram of the explosion structure of FIG. 1 in another direction.
FIG. 4 is a schematic structural view of another embodiment (second group) of a telescopic power supply track of the present invention..
FIG. 5 is a schematic diagram of the explosion structure of FIG. 4.
FIG. 6 is a schematic diagram of the explosion structure of FIG. 4 in another direction.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are used to explain the present invention.
As shown in FIG. 1 to 6, the telescopic power supply track comprises a strip-type housing 1 having a hollow cavity and a sliding device with one end extending into the cavity of the strip-type housing 1 and slidingly connected to the housing 1; the housing 1 is provided with an input wire 2 at one end and an output wire 3 at the other end, the sliding device is electrically connected to the input wire 2 and the output wire 3 respectively, and the extension length of the output wire 3 relative to the housing 1 also changes accordingly during the sliding of the sliding device along the length direction of the housing 1. In this way, when installing lamps in shelves with different widths, it is only necessary to adjust the sliding device so that the extension length of the output wire 3 relative to the housing 1 changes correspondingly, which can meet the needs of installing lamps in the shelves and is very convenient to use.
Specifically, as shown in FIG. 1 to 6, the sliding device comprises a casing 4 that extends into the cavity of the housing 1 at one end and can move along the length direction of the housing 1, and a power taking component that is cooperatively connected to the casing 4. The power taking component is electrically connected to the input wire 2 and the output wire 3 respectively, and the output wire 3 extends from the other end of the casing 4. During use, by pushing the casing 4 into the housing 1 or pulling the casing 4 outward, the distance between the other end of the casing 4 and the housing 1 becomes smaller or larger, so that the extension length of the output wire 3 protruding from the other end of the casing 4 becomes shorter or longer relative to the housing 1, so as to meet the requirements of different lengths of power supply wires for the installation of the lamp.
As a preferred embodiment, as shown in FIG. 1 to 3, the power taking component includes two conductive terminals 5, and two opposite inner side walls of the housing 1 are provided with power strips 6 connected with positive and negative poles of the input lead 2, respectively. The conductive terminals 5 are in corresponding contact with the power strip 6. Specifically, the casing 4 is an insulated hard tube, one end of the casing 4 extends into the housing 1, two conductive terminals 5 are provided on opposite sides of the one end of the casing 4 located in the housing 1, and one end of the output wire 3 located in the casing 4 stretches out from a hole on the casing 4 and then is connected to the two conductive terminals 5 respectively. The conductive terminal 5 is fixed on the casing 4 by means of encapsulation. The output wire 3 is embedded in the casing 4 and extends from the other end of the casing 4.
In the above design, the current passes through the input wire 2, the power strip 6, the conductive terminal 5, and the output wire 3 to form a path in the process. In the process of pushing and pulling the casing 4, the casing 4 will drive the conductive terminal 5 to move relative to the power strip 6, and the output wire 3 extended from the other end of the casing 4 will also move along with the casing 4, so that the extension lengths of the output wire 3 relative to the housing 1 change.
In this embodiment, the two ends of the housing 1 are provided with closed end covers 7 respectively, and the input wire 2 and the casing 4 respectively extend into the housing 1 through the end covers 7 on the corresponding sides, so that the power supply track can have very good waterproof performance. As a preference, the end cover 7 can be formed by encapsulation. At the same time, in order to prevent external moisture from entering the housing 1 through the casing 4, the end of the casing 4 located in the housing 1 adopts a closed structure, and the conductive terminal 5 is arranged on the casing 4 by encapsulation. The hole on the casing 4 for passing through the output wires 3 can be sealed to effectively prevent moisture from entering the housing 1 from the casing 4. Further, one end of the casing 4 for extending out the output wire 3 and the output wire 3 are also fixed and sealed with a rubber coating, which can prevent moisture from entering the casing 4, and can avoid pulling the output wire 3 to cause loose connection between the output wire 3 and the conductive terminal 5, resulting in poor contact.
In this embodiment, a convex block 41 is formed on the casing 4 near the conductive terminal 5. The convex block 41 is disposed on the side of the casing 4 on which the conductive terminal 5 is close to the output wire 3 extending out. The convex block 41 can abut against the corresponding end cover 7 to limit the casing 4 when the casing 4 slides, so as to avoid damaging the conductive terminal 5 or bad contact when the conductive terminal 5 is directly in contact with the end cover when the power supply wire needs to be extended to excessively pull the casing 4, thus improving the service life of the conductive terminal 5.
In this embodiment, the area on both sides of the cavity section of housing 1 is smaller than the area in the middle. The section in the middle of the cavity is a circle that matches the diameter of the casing 4. The section on both sides of the cavity is a circle with a diameter smaller than the diameter of the middle section. The power strip 6 is clamped in the circular cavity on both sides. Of course, it is conceivable that the power strip 6 can also be fixed in the hollow cavity of the housing 1 in other ways, such as by bonding.
As another preferred method, as shown in FIG. 4 to 6, the power taking component includes two power strips 6, and two conductive terminal 5 electrically connected to the positive and negative poles of the input wires 2 are fixed on the inner wall of the housing 1, the conductive terminal 5 is in corresponding contact with the power strip 6.
Specifically, the casing 4 is provided with a groove 42 formed along the length direction of the casing 4 and capable of accommodating the conductive terminal 5. The power strips 6 are distributed on both inner side walls of the groove 42. In this embodiment, the free ends of the two side walls of the groove 42 are bent on both sides to form two first grooves 43 facing the groove bottom, and two second groove 44 opposite to the two first groove 43 are formed on the groove bottom. The power strip 6 is clamped and fixed in the first clamping groove 43 and the second clamping groove 44. Of course, the power strip 6 can also be fixed to the groove 42 by means of bonding or the like. The housing 1 is provided with a fixed block 11. There are many ways to fix the fixed block 11 and the housing 1. In this embodiment, a T-shaped convex strip 12 is provided on the inner wall of the housing 1, and a T-shaped groove 111 is formed on the fixed block 11. The housing 1 is provided with first limiting holes 13 on both sides of the T-shaped convex strip 12, and the fixed block 11 is formed with second limiting holes 112 opposite to the first limiting holes 13 on both sides of the T-shaped groove 111. On the one hand, the T-shaped convex strip 12 and the T-shaped groove 111 cooperate to limit the movement of the fixed block 11 in the direction perpendicular to the length direction of the housing 1, and on the other hand, the limiting nail 14 are inserted into the first limiting holes 13 and the second limiting holes 112 to restrict the movement of the fixed block 11 along the length direction of the housing 1; the conductive terminals 5 are distributed on both sides of the fixed block 11; the conductive terminals 5 can be connected to the fixed block 11 by bonding or screw connection. The inner wall of the housing 1 is also provided a power transmission strip 15 connected to the input wire 2 and supplying power to the conductive terminal 5.
In the above design, the current passes through the input wire 2, the power transmission strip 15, the conductive terminal 5, the power strip 6, and the output wire 3 to form a path. In the process of pushing and pulling the casing 4, the casing 4 drives the power strip 6 to move. During the movement, the conductive terminal 5 and the power strip 6 are always in contact, and the output wire 3 connected to the other end of the casing 4 also moves with the casing 4, so that the extension length of the output wire 3 relative to the housing 1 changes.
In this embodiment, one end of the casing 4 is provided with a limit block 45 and this end of the casing 4 is located in the housing 1 when using. The limit block 45 abuts against the fixed block 11 to limit the casing 4 when the casing 4 slides, so as to prevent the casing 4 from sliding out of the housing 1 during the pulling process.
In this embodiment, the one end of the housing 1 and the other end of the casing 4 are respectively provided with sealed end covers 7, the input wire 2 extend into the housing 1 passing through the corresponding end covers 7, and the output wire 3 extends into the casing 4 passing through the corresponding end cover 7 and is connected to the power strip 6.
It should be mentioned that the above-mentioned conductive terminal 5 can use a terminal of type 2510, the power strip 6 uses a copper strip, and the power transmission strip 15 also uses a copper strip.
Since most of the existing shelves use iron shelves, in order to facilitate the fixing of the power supply track, a magnetic block 91 is provided on the end cover 7, and the housing 1 is adsorbed and fixed on the to-be-installed surface of the shelf through the magnetic block 91. Of course, it is conceivable that the magnetic block 91 can also be provided on the housing 1. If the power supply track of the present application is used on non-ferrous shelves, such as wooden shelves, etc., the power supply track can be fixed by bonding, screw connection, or other fixing methods.
In this application, in order to prevent the output wire 3 from extending too long relative to the housing 1 to sag, the output wire 3 is provided with a wire buckle 92, which is fixed to the surface to be installed by means of magnetic attraction, etc. It can be made of plastic and other materials. Of course, a wire buckle 92 can also be set on the input wire 2.
It should be noted that the power supply track of the present application can be applied not only to the installation of shelf lamps, but also to exhibition cabinets, homes, etc., not only for the installation of lamps, but also for the installation and extraction of other electrical equipment.
In summary, the invention relates to a telescopic power supply track comprises a housing with a hollow cavity, and a sliding device with one end extending into the cavity of the housing and slidingly connected to the housing; the housing is provided with an input wire at one end and an output wire at the other end, the sliding device is electrically connected to the input wire and the output wire respectively, and the extension length of the output wire relative to the housing changes accordingly during the sliding of the sliding device along the length direction of the housing. With this design, the extension length of the output wire relative to the power supply track can be changed by adjusting the sliding device of the power supply track, thereby meeting the different length requirements of the power supply wire, the operation is very convenient, and the appearance is beautiful. The above disclosure has been described by way of example and in terms of exemplary embodiment, and it is to be understood that the disclosure is not limited thereto.

Claims

A telescopic power supply track, comprising:
a housing (1) with a hollow cavity, and a sliding device with one end extending into the cavity of the housing (1) and slidingly connected to the housing (1);

the housing (1) is provided with an input wire (2) at one end and an output wire (3) at the other end, the sliding device is electrically connected to the input wire (2) and the output wire (3) respectively, and the extension length of the output wire (3) relative to the housing (1) changes accordingly during the sliding of the sliding device along the length direction of the housing (1),

wherein the sliding device comprises a casing (4) that extends into the cavity of the housing (1) at one end and can move along the length direction of the housing (1), and a power taking component that is cooperatively connected to the casing (4), and the power taking component is electrically connected to the input wire (2) and the output wire (3) respectively, and the output wire (3) extends from other end of the casing (4),
characterized in that
the power taking component includes two conductive terminals (5), and two opposite inner side walls of the housing (1) are provided with power strips (6) respectively connected with positive and negative poles of the input wire (2), and the conductive terminals (5) are in corresponding contact with the power strip (6),

wherein the casing (4) is an insulated hard tube, the conductive terminals (5) are disposed on one end of the insulated hard tube located in the housing (1) by encapsulation, and the output wire (3) is placed in the insulated hard tube and extends out from other end of the insulated hard tube.
The telescopic power supply track as claimed in claim 1, wherein two ends of the housing (1) are provided with closed end covers (7) respectively, and the input wire (2) and the casing (4) respectively extend into the housing (1) through the end covers (7) on the corresponding sides.
The telescopic power supply track as claimed in claim 2, wherein a convex block (41) is formed on the casing (4) near the conductive terminal (5),and the convex block (41) can abut against the corresponding end cover (7) to limit the casing (4) when the casing (4) slides.
A telescopic power supply track, comprising:
a housing (1) with a hollow cavity, and a sliding device with one end extending into the cavity of the housing (1) and slidingly connected to the housing (1);

the housing (1) is provided with an input wire (2) at one end and an output wire (3) at the other end, the sliding device is electrically connected to the input wire (2) and the output wire (3) respectively, and the extension length of the output wire (3) relative to the housing (1) changes accordingly during the sliding of the sliding device along the length direction of the housing (1),

wherein the sliding device comprises a casing (4) that extends into the cavity of the housing (1) at one end and can move along the length direction of the housing (1), and a power taking component that is cooperatively connected to the casing (4), and the power taking component is electrically connected to the input wire (2) and the output wire (3) respectively, and the output wire (3) extends from other end of the casing (4),
characterized in that
the power taking component comprises two power strips (6) and two conductive terminals (5) respectively electrically connected to the positive and negative poles of the input wires (2) are fixed on the inner wall of the housing (1), and the conductive terminals are in corresponding contact with the power strips (6),

wherein the casing (4) is provided with a groove (42) formed along the length direction of the casing (4) and capable of accommodating the conductive terminal (5), and the power strips (6) are distributed on both inner side walls of the groove (42).
The telescopic power supply track as claimed in claim 4, wherein the housing (1) is provided with a fixed block (11), and the conductive terminals (5) are distributed on both sides of the fixed block (11), and the inner wall of the housing (1) is further provided with a power transmission strip (15) connected to the input wire (2) and supplying power to the conductive terminal (5).
The telescopic power supply track as claimed in claim 5, wherein one end of the casing (4) is provided with a limit block (45) and this end of the casing (4) is located in the housing (1) when using, and the limit block (45) abuts against the fixed block (11) to limit the casing (4) when the casing (4) slides.
The telescopic power supply track as claimed in one of claims 4-6, wherein one end of the housing (1) and other end of the casing (4) are respectively provided with sealed end covers (7), and the input wire (2) extends into the housing (1) passing through the corresponding end covers (7), and the output wire (3) extends into the casing (4) passing through the corresponding end cover (7) and is connected to the power strip (6).
The telescopic power supply track as claimed in one of the preceding claims, wherein a magnetic block (91) is provided on the end cover (7) and the housing (1) is fixed on a to-be-installed surface through the magnetic block (91).
The telescopic power supply track as claimed in one of the preceding claims, wherein the output wire (3) is provided with a wire buckle (92).