RELATED APPLICATION

This application claims priority to a Chinese Patent Application No. CN 202010006938. X, filed on January 3, 2020.

FIELD OF THE TECHNOLOGY

The present invention relates to the field of power supply technology, with particular emphasis on a shelf power supply device.

BACKGROUND OF THE INVENTION

Displays are generally realized by means of shelves or showcases, which often need to use electrical equipment, such as LED lighting. LED lighting needs to be powered by wires, which brings inconvenience for installation and increases installation costs. Shelves are provided with an up or down adjustment function. When placing different products on the shelves, the height of the shelf layer boards needs to be adjusted up or down, and the fixed-length wire cannot make the layer board easy to move. The wire must be removed and then reinstalled at the new height of the layer board. In addition, the wire exposure will affect the appearance and increase safety risks.

In the prior art, in order to solve the above-mentioned problems, some power supply rails and power supply heads arranged on them are proposed to realize the power supply demand. In order to change the power supply position when the position of the shelf changes and the lamp installation position changes, the wires on the power supply track are usually bare and cannot be waterproofed, and they are easily corroded after a long time, which reduces the service life.

BRIEF SUMMARY OF THE INVENTION

In view of this, the present invention provides a shelf power supply device to solve the above technical problems. l According to the present invention there is provided a shelf power supply device comprising a strip-shaped power supply cavity, a fixed power supply terminal, a power supply head, and a flexible wire, wherein: the strip-shaped power supply cavity is provided with a strip-shaped mounting hole extending along the length direction of its side wall; the fixed power supply terminal is arranged inside the strip-shaped power supply cavity; the power supply head is slideable and positioned or arranged on the strip-shaped mounting hole, and comprises a power supply part located inside the strip-shaped power supply cavity and an output part located outside the electrical cavity; the flexible wire is arranged inside the strip-shaped power supply cavity and its two ends are respectively connected to the fixed power supply terminal and the power supply part, and when the power supply head is far from or close to the fixed power supply terminal, the flexible wire is stretched or bent correspondingly in the strip-shaped power supply cavity.

According to a further embodiment, the output part is provided with a plug or socket for external power supply.

According to a further embodiment, a protective cover is provided on the socket.

According to a further embodiment, the output part is provided with a virtual socket having the same shape as the socket and matching with the protective cover.

According to a further embodiment, the fixed power supply terminal is divided into a positive fixed power supply terminal and negative fixed power supply terminal, and correspondingly, the flexible wire is divided into a positive flexible wire and a negative flexible wire, wherein a respective first end of the positive flexible wire and of the negative flexible wire is connected to the corresponding fixed power supply terminal, and a respective second end of the positive flexible wire and of the negative flexible wire is connected to the same power supply head.

According to a further embodiment, in the length direction of the strip-shaped power supply cavity, the positive flexible wire and the negative flexible wire are respectively located on opposite sides of the power supply head.

According to a further embodiment, the positive fixed power supply terminal and the negative fixed power supply terminal are arranged opposite to each other.

According to a further embodiment, the projection of the power supply head on the cross section of the strip-shaped power supply cavity along the length direction of the strip-shaped power supply cavity is located between the positive fixed power supply terminal and the negative fixed power supply terminal.

According to a further embodiment, the fixed power supply terminal comprises: a power supply wire passing through the strip-shaped power supply cavity and fixed at both ends thereof; and a power supply block, fixedly connected to the power supply wire and connected to the flexible wire.

According to a further embodiment, the power supply head and the strip-shaped power supply cavity are positioned by friction.

Technical effects of the present invention:

The shelf power supply device of the present invention is provided with a positionable and movable power supply head on the strip-shaped power supply cavity, and a flexible wire is arranged inside the strip-shaped power supply cavity to cooperate with the movement of the power supply head for power supply. The structure is simple, flexible in use, and suitable for power supply in the changeable shelf, and also has good waterproof effect.

BRIEF DESCRIPTION OF THE DRAWINGS

The following describes embodiments of the present invention with reference to the accompanying drawings, in which:

FIG.l is a schematic diagram of the three-dimensional structure of the shelf power supply device of this embodiment.

FIG.2 is an enlarged schematic diagram of part A in FIG.1.

FIG.3 is a schematic structural diagram of the shelf power supply device wherein the protective cover in FIG.2 is removed. FIG.4 is a schematic diagram of the three-dimensional structure of the shelf power supply device with the strip-shaped power supply cavity removed of this embodiment.

FIG.5 is an enlarged schematic diagram of part B in FIG. 4.

FIG.6 is a schematic diagram of the structure of FIG.5 at another angle (front view).

FIG.7 is a schematic cross-sectional view of the shelf power supply device of the embodiment at the power supply head.

PI TA 11 FI) DESCRIPTION OF THE INVENTION

Hereinafter, specific embodiments of the present invention will be described in further detail based on the drawings. It should be understood that the description of the embodiments of the present invention is not intended to limit the scope of protection of the present invention.

As shown in figures 1 to 7, the shelf power supply device of this embodiment includes a strip-shaped power supply cavity 100, a fixed power supply terminal 200, a power supply head 300, and a flexible wire 400.

At least one set of cooperating members including a fixed power supply terminal 200, a power supply head 300 and a flexible wire 400 is provided in the strip-shaped power supply cavity 100, which can be set according to the number of shelves, and a corresponding strip-shaped mounting hole 101 is provided for each set. The strip-shaped mounting holes 101 on the strip-shaped power supply cavity 100 can be connected to each other or partitioned. In this embodiment, six groups or sets, each including a fixed power supply terminal 200, a power supply head 300 and a flexible wire 400 matched to each other, are provided in the strip-shaped power supply cavity 100, and the strip-shaped mounting holes 101 are connected with each other. In fact, in order to facilitate production and installation, in this embodiment, the strip-shaped mounting holes 101 are connected to each other and are connected to both ends of the strip-shaped power supply cavity 100.

The length and direction of the strip-shaped power supply cavity 100 are set according to the power supply requirements, and can be flat or curved, and the strip-shaped power supply cavity 100 can be surrounded by side plates. The side plates can be integral or spliced together. In order to achieve a power supply, at least one fixed power supply terminal 200 is provided inside the strip-shaped power supply cavity 100. The fixed power supply terminal 200 can be positioned directly via the side plate and laterally penetrating from the side plate of the strip-shaped power supply cavity 100 and then fixed, and then it may be externally connected to a main power supply equipment. Or a bus passing through the strip-shaped power supply cavity 100 may be provided, a power supply block 203 may be arranged on the bus, and then the power supply block 203 is fixed to realize the positioning of the fixed power supply terminal 200 in the strip-shaped power supply cavity 100. In this embodiment, the fixed power supply terminal 200 includes a power supply wire 204 (that is, a bus) and a power supply block 203. The power supply wire 204 passes through the strip-shaped power supply cavity 100 and is fixed at both ends. The power supply block 203 is fixedly connected to the power supply wire 204 and is connected to the flexible wire 400. In order to facilitate the acquisition of materials and reduce the cost, in this embodiment, the power supply wire 204 is an insulated wire. The power supply wire 204 is used to connect to the power supply bus. For convenience, a connector is generally provided at the end to connect with the external power supply bus. Of course, welding can also be used to achieve electrical connection. In this embodiment, the strip-shaped power supply cavity 100 is provided with a power supply socket 102 at one end.

The fixed power supply terminal 200 is arranged in the strip-shaped power supply cavity 100, and the side wall of the strip-shaped power supply cavity 100 is provided with a strip-shaped mounting hole 101 extending along its length. The power supply head 300 is positioned to slide on the strip mounting hole 101, and the power supply head 300 includes a power supply part 301 located in the strip-shaped power supply cavity 100 and an output part 302 located outside the strip-shaped power supply cavity 100. A flexible wire 400 is provided in the strip-shaped power supply cavity 100, the two ends of the flexible wire 400 are respectively connected to the fixed power supply terminal 200 and the power supply part 301. When the power supply head 300 is far from or close to the fixed power supply terminal 200, the flexible wire 400 is stretched or bent in the strip-shaped power supply cavity 100. The strip-shaped power supply cavity 100 is provided with at least one power supply head 300 that can moved and positioned in the longitudinal direction of the strip-shaped power supply cavity 100 depending on the requirements, and a flexible wire 400 is arranged in the strip-shaped power supply cavity 100 to cooperate with the movement of the power supply head 300 to supply power. This structure is simple, flexible to use, and suitable for changing shelf power supply. The flexible wire 400 is suitable for the power supply of the shelf, as long as it is waterproof, for example, for example an ordinary insulated wire can be used to achieve a good waterproof effect. The flexible wire 400 is confined in the strip-shaped power supply cavity 100, so that it is not easy to be observed, and thus the shelf is kept neat and beautiful.

When an external electrical appliance is connected to the output part 302, there are various power supply structures. For ease of use, the output part 302 is provided with a plug or socket 3021 for external power supply. The plug 3021 generally has a wire and is directly connected to the electrical appliance. In this embodiment, the socket 3021 is used, which is more flexible in use.

In order to protect the socket 3021 from dust and water, a protective cover 3022 is provided on the socket 3021. In order to prevent the protective cover 3022 from being lost when the socket 3021 is in use, in this embodiment, the output part 302 is provided with a virtual socket 3023 having the same shape as the socket 3021 and matching with the protective cover 3022. The virtual socket 3023 can be made into a solid structure with the same shape as the socket 3021.

The fixed power supply terminal 200 is divided into two groups, namely a group which is positive and a group which is negative. Correspondingly, the flexible wire 400 is divided into a positive flexible wire 401 and a negative flexible wire 402, which are respectively connected to the corresponding fixed power supply terminal 200. The other end of the positive flexible wire 401 and of the negative flexible wire 402 is connected to the same power supply head 300 which is associated to the fixed power supply terminal 200.

In order to provide sufficient bending space for the two flexible wires 401 and 402, in this embodiment, in the length direction of the strip-shaped power supply cavity 100, the positive flexible wire 401 and the negative flexible wire 402 are respectively located on opposite sides of the power supply head 300. The positive fixed power supply terminal 201 and the negative fixed power supply terminal 202 are arranged opposite to each other. In order to make the structure compact, in this embodiment, the projection of the power supply head 300 on the cross section of the strip-shaped power supply cavity 100 along the length direction of the strip-shaped power supply cavity 100 is located between the positive fixed power supply terminal 201 and the negative fixed power supply terminal 202. This configuration allows for a more balanced force on the power supply head 300, and it is not easy to get stuck.

There are many ways to achieve a positioning of the power supply head 300. For ease of operation, the power supply head 300 and the strip-shaped power supply cavity 100 are positioned by friction. When the size of the power supply head 300 is set to be in interference fit with at least a part of the inner wall of the strip-shaped power supply cavity 100, friction positioning can be achieved. The external material of the power supply head 300 can be made of soft rubber, silica gel, etc., to increase friction force.

The shape of the cross-section of the strip-shaped power supply cavity 100 can be designed according to the installation position, and is limited by side plates. When it is applied to common display equipment such as shelves, the surface mount installation method is generally adopted. In order to reduce the volume and reduce installation space, in this embodiment, the strip-shaped power supply cavity 100 is a flat rectangle with a certain width and height. The strip-shaped power supply cavity 100 is surrounded by four side plates, a front cover 103, a left side rail 104, a rear cover 105 and a right side rail 106. The front cover 103, the left side rail 104, the rear cover 105, and the right side rail 106 can be manufactured and assembled using a fastener connection, glue bonding or snap connection technique. For ease of manufacturing, in this embodiment, the front cover 103, the left side rail 104, the rear cover 105 and the right side rail 106 are integrally formed and manufactured. The manufacturing process can be realized by extrusion molding. Generally, the material can be plastic. In this embodiment, PVC is used and the front cover 103 is provided with a strip-shaped mounting hole 101.

In order to further prevent the flexible wire 400 from being wound and overlapping, the condition D<H<2D may apply, wherein H is the distance between the inner walls of the front cover 103 and the rear cover 105 of the strip-shaped power supply cavity 100, and D is the diameter of the flexible wire 400. Thus, the flexible wire 400 is bent and folded in a single plane, avoiding entanglement.

In order to facilitate installation, a magnetic member may be provided on the outer side wall of the strip-shaped power supply cavity 100. In this embodiment, the magnetic member is a cylindrical magnet 500 provided on both sides of the rear cover 105.

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. Rather, any modifications, equivalent alternatives or improvement etc. within the spirit of the invention are encompassed within the scope of the invention as set forth in the appended claims.