Patent Application
20180090880
1. Field of the Invention
The present invention relates to electric connectors, and specifically relates to an electric connector used on an artificial tree, an artificial Christmas tree for example.
2. Description of Related Art
Artificial trees are commonly used in holiday decoration, or commercial square decoration, and roadside decoration. Typically, an artificial tree is illuminated by light strings and decorated with decorations, such as figurines of airplanes, bicycles, space rockets, etc.
To easy the interconnection of the artificial tree, an artificial tree generally includes two or three sections of hollow trunks, many branches extending out from each section of trunks, electric wires extending within the hollow trunks, and many light strings distributed about the exterior of the tree and electrically connected with the electric wires.
Electric connectors are utilized to avoid wiring troubles induced by long wires. The electric wires are inserted into the trunks from the bottom of the tree and through the trunks to the outside of the trunks. Then the electric wires are connected to the next wires by one or one more electric connectors. Each electric connector has a male connector and a female connector, the male connector is fixed within one of the sections of trunks, and the female connector is fixed within another one of the sections of trunks. When adjacent sections of trunks are connected together, the corresponding electric connector(s) is(are) electrically connected. Thus it is easy and convenient to link the electric wires from the bottom to the top of the artificial tree by the electric connectors.
For example, U.S. Pat. No. 9,362,657 to Yang filed Feb. 13, 2015 and entitled “Quick Mount Connector Assembly of Artificial Christmas Tree” discloses a male connector and a female connector detachably connected to the male connector. The quick mount connector assembly of Yang can easily and conveniently link the electric wires from the bottom to the top of the artificial tree. However, a structure of the connector assembly is complicated and hard to manufacture and assembly, and clamping pins are needed to passing through through holes 13A, 13B secure the connector assembly to the trunks of the artificial trees.
Therefore, there is a need to provide an improved electric connector used on an artificial tree.
The foregoing and other exemplary purposes, aspects and advantages of the present invention will be better understood in principle from the following detailed description of one or more exemplary embodiments of the invention with reference to the drawings, in which:
The invention will now be described in detail through several embodiments with reference to the accompanying drawings.
An electric connector is used on an artificial tree which preferably includes two or three or four tree portions which are capable of being aligned along an axis and fixed to and supported by a base. For convenience of description, a vertical axis is defined, and the two or three or four tree portions are aligned along the vertical axis in practice. Each tree portion preferably includes a trunk portion and many branches extending outwardly from an outside wall of the trunk portion. The trunk portion is preferably cylindrical and hollow and having a lower end (closer to ground with reference to the vertical axis) and an upper end (further away from ground with reference to the vertical axis). The lower end of each trunk portion may be sized to fit into the upper end of an adjacent tree portion or the base, such that adjacent tree portions are mechanically connected together.
The electric connector includes a male connector mounted in (inserted into) the lower end of the trunk portion (labeled by 82 in
Please referring to
The supporting assembly 10 of the male connector includes a plug tube 11 and a first support 12 received in the plug tube 11. The plug tube 11 has a cylindrical structure, and defines an opening 111 at its first end (lower end) and another opening 112 at its second end (upper end) opposite to its first end. The ring 13 is sleeved on the plug tube 11, and the second end of the plug tube 11 is received in the trunk portion 82 and is held by the inner wall of the trunk portion of the artificial tree. A flange 113 extends outwardly from the first end of the plug tube 11, when the ring 13 and a lower end of the trunk portion 82 is sleeved on the plug tube 11, the flange 113 protrudes out of the ring 13 and the lower end of the trunk portion 82. Preferably, an outer surface of the flange 113 and the outer surface of ring 13 abut, and the outer surface of ring 13 and the outer surface of the lower end of the trunk portion 82 abut, and an outer diameter of the flange 113, the ring 13 and the outer diameter of the lower end of the trunk portion 82 are substantially the same. An upper end of the ring 13 contact with and is electrically connected to the end of the trunk portion 82.
An internal flange 114 extends inwardly from a tube wall (inner wall) of the plug tube 11. The internal flange 114 divides an inner space of the plug tube 11 to a first receiving space and a second receiving space. The first support 12 includes a cylinder cup 121 with an upward opening and a mounting tube 122 extending downwardly from a bottom of the cylinder cup 121. A through hole (not shown) is defined in the bottom of the cylinder cup 121 and communicates with a through hole throughout the mounting tube 122. The cylinder cup 121 is received in the first receiving space, supported by the internal flange 114, and is sized to fit into an upper inner portion (defining the first receiving space) of the plug tube 11, thus a transverse movement of the cylinder cup 121 is prevented by the plug tube 11 and a lowest position of the cylinder cup 121 in the plug tube 11 is limited by the internal flange 114. The mounting tube 122 passes through a center opening defined by the internal flange 114 and extends downwardly into an lower inner portion (defining the second receiving space) of the plug tube 11.
Further more, a line slot 1211 extending along the vertical direction is defined in the outside wall of the cylinder cup 121. A fixing plate 123 extends upwardly from an upper edge of the cylinder cup 121, and a protrude 124 protrudes towards the inner wall of the plug tube 11 from the fixing plate 123. An opening 115 corresponds to and is configured for receiving the protrude 124 is defined in the tube wall of the plug tube 11. When the first support 12 is inserted in the plug tube 11, the protrude 124 can be locked in the opening 115, thus a vertical movement of the first support is prevented.
The first electrical connector assembly 30 is mounted on the first support 12 and includes a first electric conducting ring 31 electrically connected to a first electric wire 33 and a first electric conducting rod 32 with one end electrically connected to a second electric wire 34. At least a part of the ring 31 is sleeved on the mounting tube 122, and at least a flange 1221 (and/or flange 1222) protruding out from the mounting tube 122 for preventing the ring 31 from being released from the mounting tube 122 easily.
Furthermore, a middle part of the first electric conducting ring 31 is resilient and expanded with respect to its two ends. In the embodiment, several convex ribs 311 extending substantially in vertical direction and project outwardly in a radial direction to make the ring 31 resilient and expanded in the middle. In other embodiments, the middle part of the ring 31 may includes several salient points or rings.
A part (an end) of the first electric conducting rod 32 has external thread 321. The second electric wire 34 is electrically connected to one or two nuts 341 which are screwed with the external thread 321 of the first electric conducting rod 32. The other end of the first electric conducting rod 32 passes through the mounting tube 122 from the cylinder cup side and exposed out of the mounting tube 122 and the first electric conducting ring 31.
Understandably, the first electric conducting rod 32 may be sized to fit within the mounting tube 122 and a transverse movement is restricted. Furthermore, the mounting tube 122 may have internal thread to be screwed with the external thread 321 of the first electric conducting rod 32, thus a vertical movement of the rod 32 is also restricted.
As submitted above, the female connector includes the supporting assembly 20, the second electrical connector assembly 40 and the elastic conductive metal sheet 50. The supporting assembly 20 includes a receptacle tube 21 defining an opening 211 at its first end (upper end), and a second support 22 received in the receptacle tube 21. The receptacle tube 21 has a cylindrical structure and is sized to fit into the corresponding trunk portion 84.
Please also referring to
In the embodiment, the column 222 further defines a fifth through hole 2223 communicating with the fourth through hole 2212 and parallel with the vertical axis and adjacent to the second through hole 2221. Please also referring to
The second electrical connector assembly 40 is mounted on the second support 22 and mainly includes a second electric conducting ring 41 electrically connected to a third electric wire 43, a second electric conducting rod 42 with one end electrically connected to a fourth electric wire 44 and a spring 45 sleeved on the second electric conducting rod 42. The second electric conducting ring 41 is a circular ring sized to fit into the third through hole 2222. That is, an external diameter of the ring 41 is substantially equal to an inner diameter of the third through hole 222 and is larger than that of the second through hole 2221, thus the ring 41 can be maintained within the second through hole 2222 tightly. An end of the third electric wire 43 is electrically connected to an outer surface of the ring 41, and the other end of the wire 43 passes through the fifth through hole 2223 and the fourth through hole 2212 and extends dowardly.
A part (including a first end) of the second electric conducting rod 42 has external thread 421, and the other end includes a boss 422 with a larger diameter than the other part of the rod 42. The fourth electric wire 44 is electrically connected to one or two nuts 441. The one or two nuts 441 are screwed with the external thread 421 of the second electric conducting rod 42 from an outside of the second support 22. The boss 422 is received in the second through hole 2221 or the second electric conducting ring 41 without touch of the ring 41. The spring 45 sleeved on the second electric conducting rod 42 is restrict between the bass 422 and the base plate 221 or the second column 223.
The part of the rod 42, received in the second column 223, is sized to fit into the sixth through hole 2231, thus a transverse movement is restricted. A diameter of the spring 45 is sized to fit into the second through hole 2221 (and the first through hole 2211) and is larger than the sixth through hole 2231, thus a vertical movement of the rod 32 is also limited.
Furthermore, an inner size of the receptacle tube 21 and an outer size of the second support 22 are such designed that the flange 111 (the first end) of the plug tube 11 is clamped tightly between a tube wall of the receptacle tube 21 and the second support 22 when the plug tube 11 of the male connector is inserted in the receptacle tube 21 of the female connector, and the second electric conducting ring 41 is partly sleeved on and electrically coupled with the first electric conducting ring 31, and the second electric conducting rod 42 is pressed against and electrically coupled with the first electric conducting rod 32, as illustrated in
Furthermore, the receptacle tube 21 defines two fixing holes 212, 213 in its side wall, and the two fixing holes 212 and 213 are located at the two side of base plate 221, respectively. In the embodiment, the fixing hole 212 faces the column 222, and the fixing hole 213 faces the second column 223.
The elastic conductive metal sheet 50 is attached to the outside surface of the side wall of the receptacle tube 21 and electrically connects to the inner wall of the trunk portion 84 when the trunk portion 84 is sleeved on the receptacle tube 21. The metal sheet 50 includes two arch parts 51, 52 (see
In detail, the elastic conductive metal sheet 50 extends along the outside surface of the receptacle tube 21 from an upper side (first end) towards a lower side (second end), then bends towards the inner side of the receptacle tube 21 to insert in the fixing hole 212, then bends to extend downward again, then bends toward the outside of the receptacle tube 21 to extend out of the fixing hole 212, thus the arch part 51 is formed. Similar to the arch part 51, the arch part 52 is formed at a lower side of the arch part 51. Then the metal sheet 50 extends downwards again along the outer surface of the receptacle tube 21, bends to around the lower edge of the receptacle tube 21 and extends along the inner surface of the receptacle tube 21 to form the hook 53. The end of the metal sheet 50 is close to the fixing hole 213.
In assembly, clamping/hooking the hook 53 to the lower edge of the receptacle tube 21 firstly, then inserting the arch parts 51, 52 into the fixing holes 212, 213 to finish the assembly. It is understandably, the arch parts 51, 52 are sized to fit into the fixing holes 212, 213, such that the receptacle tube 21 can maintain the metal sheet 50 in place.
As the receptacle tube 21 can be sized to fit into an end of the trunk portion (such as the trunk portion 84), and the plug tube 11 can also be sized to fit into an end of another trunk portion (such as the trunk portion 82), there is no need for clamping pins to secure the male and female connectors to the trunks. As the male and the female connectors can be connected so tightly depending on the flange, there is no need to fix adjacent trunk portions tightly, the end with the male connector mounted of the trunk portion can only be sleeved on the end with the female connector mounted of another trunk portion.
The male connector only includes two electrical connecting elements (the ring 31 and the rod 32) and two supporting pieces (the tube 11 and the support 12), and the female connector only includes two electrical connecting elements (the ring 41 and the rod 42) and one or two supporting pieces (the tube 21 and the support 22 may be integrated in one piece). Therefore a structure of the electric connector is simple and easy to manufacture and assembly.
In the embodiment, the diameter of the first through hole 2211 may be equal to that of the second through hole 2221 because of the existence of the second column 223, it is understandably, the diameter of the first through hole 2211 may be smaller than that of the second through hole 2221 in other embodiments, thus the spring 45 can be restricted between the boss 422 and the base plate 221, and the second column 223 can be omitted.
In the embodiment, the column 22 defines fifth through hole 2223 to receive the third electric wire 43, it is understandably, a line slot may be defined in the outside wall of the column 22 and used to receive the third electric wire 43 in other embodiments.
In the embodiment, the flange 111 (the first end) of the plug tube 11 is clamped tightly between a tube wall of the receptacle tube 21 and the second support 22 when the plug tube 11 of the male connector is inserted in the receptacle tube 21 of the female connector. It is understandably, in other embodiments, an outer size of the flange 111 may be slightly larger than an inner diameter of the receptacle tube 21. As a result, the flange 111 (the first end) of the plug tube 11 can be hold tightly by the tube wall of the receptacle tube 21 when the plug tube 11 of the male connector is inserted in the receptacle tube 21 of the female connector. Thus, the stability of the electrical and mechanical connections between the male connector and the female connector (adjacent trunk portions of the artificial tree) can also be insured.
It is understandably, the first and the second electric wires 33, 34 may be respectively connected electrically to electric wires of another female connector mounted in the other end of the trunk portion, and may also be respectively connected electrically to a positive end and a negative end of a wall outlet which is partly exposed out of the trunk portion. The wall outlet may be used to electrically connected to the light strings those are distributed about the exterior of the tree. Similarly, the third and the fourth electric wires 43, 44 may be respectively connected electrically to electric wires of another male connector mounted in the other end of the trunk portion, and may also be respectively connected electrically to a positive end and a negative end of a power plug or a wall outlet which is partly exposed out of the trunk portion. The ring 13 contacts with and is electrically connected to the upper end of the trunk portion 82. The metal sheet 50 contacts with and is electrically connected to the inner wall of the trunk portion 84. The metal sheet 50 in the female connector which is installed in the lowest trunk portion may be connected electrically to a ground end (ground lead/end) of a power plug or a wall outlet via an electric wire 45 (
In the embodiment, the elastic conductive metal sheet 50 is attached to the outer surface of the receptacle tube 21, and the arch parts 51, 52 insert into the fixing holes 212, 213 from the outside of the receptacle tube 21, such the ring 13 electrically contacts with the arch part 51. Thus the lower end of the trunk portion 82 which contact with the ring 13 is electrically connected to the trunk portion 84 via the ring 13 and the metal sheet 50. As the metal sheet 50 is grounded, all the trunk portion 82 is grounded.
In the other embodiment, the elastic conductive metal sheet 50 may be attached to the inner surface of the receptacle tube 21, and the arch parts 51, 52 insert into the fixing holes 212, 213 from the inner side of the receptacle tube 21, such the lower end of the trunk portion 82 electrically contacts with the straight-extending part of the metal sheet 50, and the arch parts 51, 52 may electrically contacts with the trunk portion 84. In other embodiment, the fixing hole 213 can be omitted.
In other embodiment, portions other than the flange 113 of the plug tube 11 may be sized to fit into the ring 13, and an upper part of the ring may be sized to fit into the trunk portion 82, therefore the upper part of the ring 13 is received in and contacts with the inner wall of the trunk portion 82 and is electrically connected to the trunk portion. The outer diameters of the flange 113, a lower part of the ring 13 and the trunk portion 82 are the same.
Please refer to
While the invention has been described in terms of several exemplary embodiments, those skilled on the art will recognize that the invention can be practiced with modification within the spirit and scope of the appended claims. In addition, it is noted that, the Applicant's intent is to encompass equivalents of all claim elements, even if amended later during prosecution.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201621091022.4 | Sep 2016 | CN | national |
The present application is a continuation-in-part of U.S. patent application Ser. No. 15/347,804, filed Nov. 10, 2016, which claims the benefit of CN Utility Patent Application No. 201621091022.4, filed Sep. 29, 2016, all of which are incorporated herein by reference in their entireties.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15347804 | Nov 2016 | US |
| Child | 15626037 | US |
