WO2024183562A1

WO2024183562A1 - Ball joint and electrical appliance

Info

Publication number: WO2024183562A1
Application number: PCT/CN2024/078832
Authority: WO
Inventors: 代鑫
Original assignee: 苏州欧普照明有限公司; 欧普照明股份有限公司
Priority date: 2023-03-03
Filing date: 2024-02-27
Publication date: 2024-09-12
Also published as: CN219775628U

Abstract

A ball joint (1) and an electrical appliance. The ball joint (1) comprises a ball member (100) and a base (200); the ball member (100) is provided with a first assembly hole; the ball member (100) comprises a ball body (101) and a connection part (102) which are connected to each other; the connection part (102) is suitable for connecting to an electrical device (3) of the electrical appliance; the first assembly hole passes through the ball body (101) and the connection part (102); the base (200) is suitable for fixedly connecting to a support (2) of the electrical appliance; the base (200) is provided with a second assembly hole and a spherical cavity adapted to the ball body (101); the ball body (101) is rotatably provided in the spherical cavity; and the first assembly hole and the second assembly hole are communicated with each other and are used for a lead-out wire of the electrical appliance to pass through. The lead-out wire is not prone to winding on the support, is internally protected, is not prone to damage, and has good reliability during use.

Description

Ball joints and electrical equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese patent application No. 2023203892791, filed on March 3, 2023, entitled “Ball joint and electrical equipment”, which is incorporated herein by reference in its entirety.

Technical Field

The present application relates to the technical field of electrical equipment, and in particular to a ball joint and electrical equipment.

Background Art

In order to provide flexibility between different components, existing electrical appliances such as desk lamps often have a ball joint between two components.

Although the use of a ball joint can achieve free rotation of the two components within a certain angle range, the lead wires of the electrical equipment are usually arranged outside the body of the electrical equipment. If a ball joint is used, the lead wires will be displaced relative to the body of the electrical equipment due to its universal rotation characteristics, causing the exposed lead wires to be entangled and twisted with each other, and the lead wires to be entangled with the body of the electrical equipment, etc., affecting the aesthetics of the electrical equipment. At the same time, it is also easy to cause damage to the lead wires.

Summary of the invention

The purpose of the present application is to provide a ball joint and an electrical device to hide lead wires and reduce lead wire damage.

To achieve the above-mentioned purpose, the technical solution of the present application provides a ball joint, comprising: a ball head component and a base; the ball head component is provided with a first assembly hole, the ball head component comprises a connected A ball head body and a connecting part, wherein the connecting part is suitable for connecting to an electrical appliance of an electrical device, and the first assembly hole passes through the ball head body and the connecting part; the base is suitable for being fixedly connected to a bracket of the electrical device, and the base is provided with a second assembly hole and a spherical cavity adapted to the ball head body, the ball head body is rotatably arranged in the spherical cavity, the first assembly hole and the second assembly hole are interconnected and are used for the lead-out wires of the electrical device to pass through.

Optionally, the lead-out wire includes a first wire portion and a second wire portion that are independent of each other; the ball joint also includes: a conductive slip ring, which is used to couple the first wire portion and the second wire portion, and the conductive slip ring is arranged in the first assembly hole or the second assembly hole; the conductive slip ring includes: a first sliding portion and a second sliding portion; the first sliding portion is suitable for electrically connecting the first wire portion; the second sliding portion is suitable for electrically connecting the second wire portion, the first sliding portion is sleeved outside the second sliding portion, and the second sliding portion is rotatably connected to the first sliding portion.

Optionally, the first assembly hole is suitable for passing the first wire portion, the second assembly hole is suitable for passing the second wire portion, and the conductive slip ring is suitable for electrically connecting the first wire portion and the second wire portion through its opposite sides.

Optionally, the first assembly hole includes: a first hole portion and a second hole portion; the first hole portion is arranged in the connecting portion, and the first hole portion is suitable for passing the first wire portion; the second hole portion is arranged in the ball head body, and the second hole portion is located between the first hole portion and the second assembly hole, and the aperture of the second hole portion is larger than the aperture of the first hole portion; the first sliding portion is arranged in the second hole portion, and a portion of the second sliding portion extends out of the first sliding portion to be suitable for electrically connecting the second wire portion.

Optionally, the connecting part is a screw rod, a first end of the screw rod is connected to the ball head, an electrical appliance of the electrical device is provided with a nut, and a second end of the screw rod is suitable for being threadedly connected to the nut.

Optionally, the base includes: a shell, a pressure ring assembly and a locking assembly; the shell has a receiving cavity, a first opening and a second opening, the first opening and the second opening are respectively located at two ends of the receiving cavity, and the first opening and the second opening are connected to the An accommodating cavity; a locking assembly is detachably arranged at the second opening, and the locking assembly is provided with a through hole, and the through hole and the second opening constitute all or part of the second assembly hole; a pressing ring assembly is arranged in the accommodating cavity, and the two ends of the pressing ring assembly are respectively abutted against the first opening and the locking assembly, and the spherical cavity is formed in the pressing ring assembly, and the two ends of the spherical cavity are respectively connected to the first opening and the second opening.

Optionally, the locking assembly includes: a washer and a fastener; a washer, the upper surface of the washer abuts against the bottom surface of the pressure ring assembly; the upper surface of the fastener abuts against the bottom surface of the washer, the pressure ring assembly, the washer and the fastener are arranged in sequence along the axial direction of the base, and the outer wall of the fastener is provided with an external thread; the inner wall of the shell is provided with an internal thread, and the internal thread is used to match the external thread of the fastener; the fastener is provided with a through hole, and the through hole includes the through hole.

Optionally, the pressure ring assembly includes an upper pressure ring and a lower pressure ring; the upper pressure ring and the lower pressure ring are arranged in sequence along the axial direction of the base, the upper pressure ring and the lower pressure ring together form the spherical cavity, and there is a gap between the bottom surface of the upper pressure ring and the top surface of the lower pressure ring.

Correspondingly, the technical solution of the present application also provides an electrical device, including an electrical appliance, a bracket, a lead wire and a ball joint as described in any one of the above items; the electrical appliance and the bracket are movably connected through the ball joint, the first end of the lead wire is connected to the electrical appliance, the second end of the lead wire passes through the ball joint and the bracket, and is suitable for electrical connection to a power source.

Optionally, the electrical equipment is a lighting fixture, and the electrical appliance is a lamp holder.

Compared with the prior art, the technical solution of the present application has the following beneficial effects:

In the ball joint and electrical equipment provided by the technical solution of the present application, since a first assembly hole is provided in the ball head component and a second assembly hole is provided in the base, and when the ball head component is provided in the ball head cavity, the first assembly hole and the second assembly hole are connected to each other for the lead wire to pass through, the lead wire can be hidden inside the wire hole, so that when the electrical appliance and the bracket are rotated freely within a certain angle range, the lead wire is not easy to be entangled with the bracket and is Built-in protection, so the lead wire is not easily damaged, and the reliability is good during use.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic diagram of the structure of an electrical device provided in one embodiment of the present application;

FIG. 2 is a partial enlarged view of point A in FIG. 1 .

Reference numerals:
1: ball joint; 100: ball head; 101: ball head body; 102: connecting part; 200:
Base; 201: housing; 202: pressing ring assembly; 2021: upper pressing ring; 2022: lower pressing ring; 203: locking assembly; 2031: washer; 20311: butterfly washer; 20312: flat washer; 2032: fastener; 300: conductive slip ring; 301: first sliding part; 302: second sliding part;
2: Bracket;
3: Electrical appliances; 310: Nuts;
401: first line portion; 402: second line portion.

DETAILED DESCRIPTION

Existing electrical equipment generally includes a bracket, an electrical appliance and a lead-out line. The bracket and the electrical appliance are connected using a ball joint. Within a certain range, the electrical appliance can be rotated arbitrarily relative to the bracket, which increases its flexibility.

However, the lead wire is usually set outside the main body of the electrical equipment. Due to the universal rotation characteristics of the ball joint, the relative position of the lead wire and the main body of the electrical equipment changes, resulting in exposure. The entanglement and twisting of the lead wires affect the aesthetics of the electrical equipment and are also likely to cause damage to the lead wires.

For example, electrical appliances such as desk lamps usually have a ball joint between the lamp head and the bracket in order to improve the flexibility of the lamp head.

Although the ball joint allows the lamp head and the bracket to rotate freely within a certain angle range, the lead wires of the table lamp are usually set outside the table lamp body. When the lamp head and the bracket rotate relative to each other, the lead wires will inevitably move with the lamp head, causing the lead wires to be entangled with each other, the lead wires to be entangled with the bracket, the lead wires to be twisted, etc., affecting the aesthetics of the table lamp, and at the same time, it is easy to cause damage to the lead wires.

In this regard, the technical solution of the present application provides a ball joint and an electrical device to solve the above-mentioned problem.

In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The following is a detailed description with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2 , in an embodiment of the present application, a ball joint 1 and an electrical device using the ball joint 1 are disclosed.

The electrical equipment includes a bracket 2, an electrical appliance 3 and a lead wire. The bracket 2 and the electrical appliance 3 are movably connected through a ball joint 1. The first end of the lead wire is electrically connected to the electrical appliance 3, and the second end of the lead wire is connected to another device such as a power supply or a controller.

In this embodiment, the electrical device is a lighting fixture, and the electrical appliance 3 is a lamp holder.

In some other embodiments, the electrical device may also be an electric fan, and the electrical appliance may be a fan head; the electrical device may also be a vacuum cleaner, and the electrical appliance may be a suction head, which is not limited here.

In this embodiment, the ball joint 1 comprises: a ball head 100 and a base 200; the ball head 100 is provided with a first assembly hole, and the ball head 100 comprises a connected ball head body 101 and a connecting portion 102, the connecting portion 102 is suitable for connecting with the electrical appliance 3 of the electrical equipment, and the first assembly hole passes through the ball head body 101 and the connecting portion 102; the base 200 is suitable for being fixedly connected with the bracket 2 of the electrical equipment, and the base 200 is provided with a second assembly hole and a spherical cavity adapted to the ball head body 101, and the ball head body 101 is rotatably arranged in the spherical cavity, and the first assembly hole and the second assembly hole are interconnected and provided for the lead-out wire of the electrical equipment to pass through.

The ball head body 101 and the connecting portion 102 are connected, and the connection method can be a fixed connection method such as welding and integral molding.

The base 200 is suitable for fixed connection with the bracket 2, and the connection method can be welding, one-piece molding or other fixed connection methods.

The spherical cavity is adapted to the ball head body 101, the outer surface of the ball head body 101 is a spherical surface, and the inner surface of the spherical cavity is a spherical surface adapted to the outer surface of the ball head body 101. Within a certain angle range, the ball head body 101 can rotate arbitrarily in the spherical cavity.

Among them, a third assembly hole is provided inside the bracket 2, and the third assembly hole passes through the bracket 2. The third assembly hole is connected with the first assembly hole and the second assembly hole to form a wire hole. The lead-out wire is passed through the third assembly hole, the first assembly hole and the second assembly hole to hide and protect the lead-out wire and increase the aesthetics of the electrical equipment.

The ball joint 1 provided in the present embodiment is configured by setting a first assembly hole in the ball head component 100 and a second assembly hole in the base 200. Furthermore, when the ball head component 100 is arranged in the ball head cavity, the first assembly hole and the second assembly hole are connected to each other for the lead wire to pass through. Therefore, the lead wire can be hidden inside the wire hole. Thus, when the electrical appliance 3 and the bracket 2 can rotate freely within a certain angle range, the lead wire is not easy to be entangled with the bracket 2 and is protected by the built-in protection. Therefore, the lead wire is not easy to be damaged and has good reliability during use. At the same time, the aesthetics of the electrical equipment is improved.

In some embodiments, as shown in Figure 1, the electrical device can be a desk lamp, the bracket 2 can be a mounting bracket of the desk lamp, the electrical appliance 3 can be a lamp holder, the lamp holder is movably connected to the mounting bracket of the desk lamp through a ball joint 1, and the second end of the lead wire passes through the first assembly hole and the second assembly hole in sequence to be connected to the power supply.

In some embodiments, a limiting groove is provided at the bottom of the bracket 2, the height of the limiting groove is greater than or equal to the diameter of the lead-out wire, and part of the lead-out wire is provided in the limiting groove.

The first end of the lead wire extends from the end of the bracket 2 away from the electrical appliance 3, and the extended part passes through the limiting groove and is connected to the power supply to achieve stable placement of the bracket 2 and prevent the lead wire from being entangled with the bracket 2.

In some embodiments, the first assembly hole may extend axially along the ball head member 100 , and the first assembly hole passes through the ball head body 101 and the connecting portion 102 ; the second assembly hole may extend axially along the base 200 , and the second assembly hole passes through the base 200 .

During the relative rotation of the ball head 100 and the base 200 , the first assembly hole remains connected to the second assembly hole.

Furthermore, the connection part 102 is connected to the electrical appliance 3 by a detachable connection method such as a threaded connection, a plug-in connection, a snap connection, etc., so as to increase the flexibility of the connection between the connection part 102 and the electrical appliance 3 and facilitate replacement and maintenance.

In some embodiments, the connecting portion 102 is a screw, and the electrical appliance 3 is provided with a nut 310 , which is threadedly connected to the screw to achieve a detachable connection between the electrical appliance 3 and the ball head 100 .

The screw rod is provided with an external thread, and the external thread is suitable for matching with the internal thread of the nut 310 .

In some embodiments, the lead-out line includes a first line portion 401 and a second line portion 402 that are independent of each other.

The ball joint 1 further comprises a conductive slip ring 300 , which is used to couple the first wire portion 401 and the second wire portion 402 . The conductive slip ring 300 is disposed in the first assembly hole or the second assembly hole.

The conductive slip ring 300 includes: a first sliding part 301 and a second sliding part 302 . The first sliding part 301 is suitable for electrically connecting to the first wire part 401 , and the second sliding part 302 is suitable for electrically connecting to the second wire part 402 . The second sliding part 302 is sleeved outside the first sliding part 301 , and the second sliding part 302 is rotatably connected to the first sliding part 301 .

The first sliding part 301 and the second sliding part 301 can rotate relative to each other. During the relative rotation of the sliding part 301 and the second sliding part 302 , the first sliding part 301 and the second sliding part 302 maintain electrical connection.

The first wire portion 401 and the second wire portion 402 are independent of each other, and the first wire portion 401 and the second wire portion 402 are electrically connected via the conductive slip ring 300 .

In some embodiments, the conductive slip ring 300 can be disposed in the first assembly hole or in the second assembly hole to enable the ball head body 101 to rotate freely within a certain angle range relative to the base 200 .

Among them, one of the first sliding part 301 and the second sliding part 302 is a stator, and the other of the first sliding part 301 and the second sliding part 302 is a rotor. The first wire part 401 is connected to the first sliding part 301, and the second wire part 402 is connected to the second sliding part 302. During the relative rotation of the first sliding part 301 and the second sliding part 302, the first wire part 401 and the second wire part 402 maintain electrical connection.

In some embodiments, as shown in FIG. 2 , the conductive slip ring 300 is disposed in the first assembly hole, the first sliding portion 301 and the first assembly hole can be fixedly connected by means of threaded connection, gluing, or other fixed connection methods, the second sliding portion 302 is disposed in the first sliding portion 301, and during the rotation of the ball head component 100, the first sliding portion 301 rotates synchronously with the ball head component 100, and the second sliding portion 302 maintains its original state unchanged.

It can be understood that during the rotation of the ball head component 100 relative to the base 200, the first sliding portion 301 and the first assembly hole are fixedly arranged, so that the first wire portion 401 and the ball head component 100 can remain relatively still; the second sliding portion 302 remains in its original state, and the second wire portion 402 remains unchanged relative to the bracket 2, thereby avoiding damage to the lead wire.

Moreover, during the process of the ball head component 100 tilting and rotating relative to the base 200, the first sliding portion 301 and the first assembly hole are fixedly arranged, so that the first wire portion 401 and the ball head component 100 can remain relatively still; the second sliding portion 302 tilts with the ball head component 100, and the second wire portion 402 may be stretched or compressed and bent. Although the position of the second wire portion 402 changes relative to the bracket 2, the change is small, and the wires are not entangled or the wire body is twisted at a large angle, which can greatly reduce the damage to the lead-out wire body.

In this embodiment, by providing a conductive slip ring 300, the first wire portion 401 and the second wire portion 402 are electrically connected through the conductive slip ring 300. By utilizing the structural characteristics of the conductive slip ring 300, during the rotation of the ball head 100 relative to the base 200, the conductive slip ring 300 can interrupt the rotation process, and the first wire portion 401 and the second wire portion 402 maintain a stable electrical connection through the conductive slip ring 300, thereby avoiding the movement of the first wire portion 401 relative to the ball head 100 and reducing the movement of the second wire portion 402 relative to the bracket 2, thereby avoiding the lead wire from being twisted and entangled and causing breakage damage, thereby achieving the electrical appliance 3 and the bracket 2 to rotate freely within a certain angle range, while reducing the damage to the lead wire and extending the life of the lead wire.

In some embodiments, the first assembly hole is suitable for passing the first wire portion 401 , the second assembly hole is suitable for passing the second wire portion 402 , and the conductive slip ring 300 is suitable for electrically connecting the first wire portion 401 and the second wire portion 402 through its opposite sides.

The two opposite ends of the conductive slip ring 300 are electrically connected to the first wire portion 401 and the second wire portion 402 respectively.

Furthermore, the first assembly hole includes: a first hole portion and a second hole portion; the first hole portion is arranged in the connecting portion 102, and the first hole portion is suitable for passing the first wire portion 401; the second hole portion is arranged in the ball head body 101, and the second hole portion is located between the first hole portion and the second assembly hole, and the aperture of the second hole portion is larger than the aperture of the first hole portion; the first sliding portion 301 is arranged in the second hole portion, and a portion of the second sliding portion 302 extends out of the first sliding portion 301 to be suitable for electrically connecting the first wire portion 401.

In this embodiment, since the aperture of the second hole portion is larger than that of the first hole portion, the diameter of the first sliding portion 301 matches the aperture of the second hole portion, thereby axially limiting the conductive slip ring 300 and preventing the conductive slip ring 300 from moving axially along the ball head component 100, thereby improving the stability of the structure.

In some embodiments, the second sliding portion 302 extends out of the first sliding portion 301 and into the second assembly hole, and is further adapted to be electrically connected to the second wire portion 402 .

In this embodiment, since the diameter of the end of the second sliding portion 302 is much smaller than the diameter of the second hole portion, the rotation of the ball head 100 relative to the base 200 is not affected.

Furthermore, the base 200 also includes: a housing 201, a pressure ring assembly 202 and a locking assembly Part 203; the shell 201 has a accommodating cavity, a first opening and a second opening, the first opening and the second opening are respectively located at the two ends of the accommodating cavity, and the first opening and the second opening are both connected to the accommodating cavity; the locking component 203 is detachably arranged at the second opening, and the locking component 203 is provided with a through hole, and the through hole and the second opening constitute all or part of the second assembly hole; the pressing ring component 202 is arranged in the accommodating cavity, and the two ends of the pressing ring component 202 are respectively abutted against the first opening and the locking component 203, and a spherical cavity is formed in the pressing ring component 202, and the two ends of the spherical cavity are respectively connected to the first opening and the second opening.

The ball head body 101 is a spherical body, and is confined in the accommodating cavity of the housing 201 by the pressing ring assembly 202 and the locking assembly 203 .

In this embodiment, the locking assembly 203 is arranged at the second opening and can move axially along the shell 201 to axially squeeze the ball head body 101, so that friction is generated between the spherical surface of the ball head body 101 and the inner surface of the pressure ring assembly 202, so that a certain external force is required to allow the electrical appliance 3 and the bracket 2 to rotate relative to each other, thereby avoiding excessive flexibility between the electrical appliance 3 and the bracket 2 that affects use.

In some embodiments, the pressure ring assembly 202 includes an upper pressure ring 2021 and a lower pressure ring 2022; the upper pressure ring 2021 and the lower pressure ring 2022 are arranged in sequence along the axial direction of the base 200, and the upper pressure ring 2021 and the lower pressure ring 2022 jointly form a spherical cavity; there is a gap between the bottom surface of the upper pressure ring 2021 and the top surface of the lower pressure ring 2022.

The interiors of the upper pressure ring 2021 and the lower pressure ring 2022 are both hemispherical, and the upper pressure ring 2021 and the lower pressure ring 2022 jointly define a spherical space to limit the ball head body 101 so that the ball head body 101 can move in the spherical space.

Among them, the axial openings of the upper pressure ring 2021 and the lower pressure ring 2022 are connected, the hole of the upper pressure ring 2021 is connected to the first opening for extending the screw, and the hole of the lower pressure ring 2022 is connected to the second opening for extending the second wire portion 402.

In this embodiment, a gap is provided between the bottom surface of the upper pressure ring 2021 and the top surface of the lower pressure ring 2022 to increase the moving space of the fastening assembly and further enhance the fastening effect of the fastening assembly on the ball head body 101 .

Furthermore, the locking assembly 203 includes: a washer 2031 and a fastener 2032; the upper surface of the washer 2031 abuts against the bottom surface of the pressure ring assembly 202; the upper surface of the fastener 2032 abuts against the bottom surface of the washer 2031, the pressure ring assembly 202, the washer 2031 and the fastener 2032 are arranged in sequence along the axial direction of the base 200, and the outer wall of the fastener 2032 is provided with an external thread, and the inner wall of the shell 201 is provided with an internal thread, and the internal thread is used to match the external thread of the fastener 2032; the fastener 2032 is provided with a through hole, and the through hole includes a through hole.

The washer 2031 and the fastener 2032 are disposed in the accommodating cavity, the top surface of the washer 2031 abuts against the bottom surface of the lower pressure ring 2022 , and the top surface of the fastener 2032 abuts against the bottom surface of the washer 2031 .

The outer ring of the fastener 2032 has threads, and the outer ring of the fastener 2032 matches the inner wall of the housing 201 . During the process of fastening the fastener 2032 , the fastener 2032 presses the washer 2031 , and the washer 2031 presses the ball head 100 .

In some embodiments, the washer 2031 includes a butterfly washer 20311 and a flat washer 20312; the flat washer 20312 is arranged at the bottom of the pressure ring assembly 202, the butterfly washer 20311 is arranged at the bottom of the flat washer 20312, and the upper surface of the flat washer 20312 abuts against the lower bottom surface of the lower pressure ring 2022.

Among them, the butterfly washer 20311 has a certain angle. During the process of tightening the fastener 2032, the fastener 2032 can further generate axial pressure on the pressure ring assembly 202, thereby increasing the friction between the spherical surface of the ball head body 101 and the inner surface of the pressure ring assembly 202.

At the same time, the setting of the flat washer 20312 can generate a uniform axial force on the bottom surface of the pressure ring assembly 202 during the tightening process, thereby avoiding stress concentration and extending the service life of the parts.

In some embodiments, the through hole is a contoured hole that is adapted to fit with the surface of a fastening tool and can be used by the fastening tool to rotate the fastener 2032 and allow the lead wire to pass through.

The ball joint 1 provided in this embodiment has a first assembly hole and a second assembly hole arranged inside the ball joint 1, so that when the electric appliance 3 and the bracket 2 are rotated freely within a certain angle range, the lead wire is not easily entangled with the bracket 2 and is protected by the built-in protection, thereby the lead wire is not easily damaged, the reliability is good during use, and the aesthetics of the electric appliance is improved; On the one hand, by arranging the conductive slip ring 300 in the first assembly hole or the second assembly hole, the lead wires are prevented from being entangled with each other during the rotation of the electrical appliance 3 relative to the bracket 2, further reducing damage to the lead wires and increasing the service life of the electrical equipment.

This embodiment also provides an electrical device, including an electrical appliance 3, a bracket 2, lead wires and any of the above ball joints 1.

The electrical appliance 3 is movably connected to the bracket 2 via the ball joint 1, the first end of the lead wire is connected to the electrical appliance 3, the second end of the lead wire passes through the ball joint 1 and the bracket 2, and is suitable for being electrically connected to a power source.

The electrical equipment provided in this embodiment is provided with a ball joint 1, and a first assembly hole and a second assembly hole are provided inside the ball joint 1, so that when the electrical appliance 3 and the bracket 2 are rotated freely within a certain angle range, the lead wire is not easily entangled with the bracket 2 and is protected inside. Therefore, the lead wire is not easily damaged, the reliability is good during use, and the aesthetics of the electrical equipment is improved. On the other hand, by providing a conductive slip ring 300 in the first assembly hole or the second assembly hole, during the rotation of the electrical appliance 3 relative to the bracket 2, the lead wires are prevented from being entangled with each other, the damage to the lead wires is further reduced, and the service life of the electrical equipment is improved.

In some embodiments, the electrical equipment is a lighting fixture, and the electrical appliance 3 is a lamp holder; the lamp holder and the bracket 2 are movably connected through a ball joint 1, the first end of the lead wire is connected to the lamp holder, and the second end is suitable for passing through the ball joint 1 and the bracket 2 to connect to the power supply.

The lighting fixture provided in this embodiment, by providing a ball joint 1 and providing a first assembly hole and a second assembly hole inside the ball joint 1, achieves that when the lamp holder and the bracket 2 are freely rotated within a certain angle range, the lead wires are not easily entangled with the bracket 2 and are protected internally, thereby preventing the lead wires from being damaged, improving the reliability during use, and improving the aesthetics of the electrical equipment; on the other hand, by providing a conductive slip ring 300 in the first assembly hole or the second assembly hole, during the rotation of the lamp holder relative to the bracket 2, entanglement between the lead wires is avoided, further reducing damage to the lead wires and improving the service life of the electrical equipment.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this application. Non-limiting; although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

A ball joint (1) comprising:

A ball head component (100), wherein the ball head component (100) is provided with a first assembly hole, the ball head component (100) comprises a connected ball head body (101) and a connecting portion (102), the connecting portion (102) being suitable for connecting to an electrical appliance (3) of an electrical device, and the first assembly hole passes through the ball head body (101) and the connecting portion (102);

A base (200) is suitable for being fixedly connected to a bracket (2) of the electrical device, the base (200) is provided with a second assembly hole and a spherical cavity adapted to the ball head body (101), the ball head body (101) is rotatably arranged in the spherical cavity, the first assembly hole and the second assembly hole are interconnected and are used for the lead wire of the electrical device to pass through.
The ball joint (1) according to claim 1, wherein the lead wire comprises a first wire portion (401) and a second wire portion (402) which are independent of each other;

The ball joint (1) further comprises: a conductive slip ring (300), the conductive slip ring (300) being used to couple the first wire portion (401) and the second wire portion (402), the conductive slip ring (300) being arranged in the first assembly hole or the second assembly hole;

The conductive slip ring (300) comprises: a first sliding part (301), the first sliding part (301) is suitable for electrically connecting to the first wire part (401); a second sliding part (302), the second sliding part (302) is suitable for electrically connecting to the second wire part (402), the first sliding part (301) is sleeved outside the second sliding part (302), and the second sliding part (302) is rotatably connected to the first sliding part (301).
The ball joint (1) according to claim 2, wherein the first assembly hole is suitable for passing the first wire portion (401), the second assembly hole is suitable for passing the second wire portion (402), and the conductive slip ring (300) is suitable for electrically connecting the first wire portion (401) and the second wire portion (402) through its opposite sides.
The ball joint (1) according to claim 3, wherein the first assembly hole comprises: a first hole portion, arranged in the connecting portion (102), the first hole portion being suitable for The first wire portion (401) is passed through; a second hole portion is provided in the ball head body (101), the second hole portion is located between the first hole portion and the second assembly hole, and the hole diameter of the second hole portion is larger than the hole diameter of the first hole portion;

The first sliding portion (301) is disposed in the second hole portion, and a portion of the second sliding portion (302) extends out of the first sliding portion (301) so as to be suitable for electrically connecting to the second wire portion (402).
The ball joint (1) according to claim 1, wherein the connecting part (102) is a screw, the first end of the screw is connected to the ball head part (100), the electrical appliance (3) of the electrical equipment is provided with a nut (310), and the second end of the screw is suitable for being threadedly connected to the nut (310).
The ball joint (1) according to any one of claims 1 to 5, wherein the base (200) comprises:

A housing (201), the housing (201) comprising a housing cavity, a first opening and a second opening, the first opening and the second opening being respectively located at two ends of the housing cavity, and the first opening and the second opening being both connected to the housing cavity;

A locking assembly (203) is detachably arranged at the second opening, the locking assembly (203) is provided with a through hole, and the through hole and the second opening constitute all or part of the second assembly hole;

A pressure ring assembly (202) is arranged in the accommodating cavity, and two ends of the pressure ring assembly (202) are respectively abutted against the first opening and the locking assembly (203), and the spherical cavity is formed in the pressure ring assembly (202), and two ends of the spherical cavity are respectively connected to the first opening and the second opening.
The ball joint (1) according to claim 6, wherein the locking assembly (203) comprises: a washer (2031), the upper surface of which abuts against the bottom surface of the pressure ring assembly (202); a fastener (2032), the upper surface of which abuts against the bottom surface of the washer (2031), and the pressure ring assembly (202), the washer (2031) and the fastener (2032) are sequentially arranged along the axial direction of the base (200). The fastener (2032) is provided with an outer wall having an external thread;

The inner wall of the shell (201) is provided with an internal thread, and the internal thread is used to match the external thread of the fastener (2032); the fastener (2032) is provided with a through hole, and the through hole includes the through hole.
According to the ball head joint (1) according to claim 6, the pressure ring assembly (202) includes an upper pressure ring (2021) and a lower pressure ring (2022), the upper pressure ring (2021) and the lower pressure ring (2022) are arranged in sequence along the axial direction of the base (200), the upper pressure ring (2021) and the lower pressure ring (2022) jointly form the spherical cavity, and the bottom surface of the upper pressure ring (2021) and the top surface of the lower pressure ring (2022) have a gap.
An electrical device, comprising an electrical appliance (3), a bracket (2), a lead wire and a ball joint (1) according to any one of claims 1 to 8;

The electrical appliance (3) and the bracket (2) are movably connected via the ball joint (1); the first end of the lead wire is connected to the electrical appliance (3); the second end of the lead wire passes through the ball joint (1) and the bracket (2) and is suitable for being electrically connected to a power source.
The electrical device according to claim 9, wherein the electrical device is a lighting fixture, and the electrical appliance (3) is a lamp holder.