Light bulb holder structure and light bulb having same

A light bulb holder structure and a light bulb having same, in which the bulb cap of the light bulb holder is provided with a plurality of grooves in a tactful manner, and the depth of the grooves is greater than that of the external threads of the bulb cap, such that after the bulb cap is mounted on the light bulb and the light bulb is mounted on the light socket, the water accumulated between the light bulb holder structure and the light socket can be effectively discharged through the grooves. As a result, failure of the insulator (connector) on the light bulb holder structure caused by water accumulation can be avoided to a certain extent, thereby improving the reliability and safety of the light bulb.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims priority to Chinese Patent Application No. 202223001638.6, filed on Nov. 10, 2022, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to the technical field of light bulb structures, in particular to a light bulb holder structure and a light bulb having same.

BACKGROUND

Light bulb holder is a key part which connects the light bulb and socket. The light bulb holder can directly affect the service life and stability of the light bulb or lamp. Usually, most light bulb holders are not waterproof or only have limited waterproof ability, especially when the bulb is mounted transversely outdoors or in an environment lacking waterproof measures or means for avoiding water, water is likely to be accumulated with a certain thickness between the socket and bulb when the light gets wet by water (the stability of the water accumulation is improved since water gets into the space between the light bulb holder and the socket and due to the viscosity of water). Since rain water or domestic water has impurities, the accumulation of rain water or domestic water between the socket and light bulb holder of a light will reduce the insulating property of the insulating region, thus resulting in electrodischarge and ignition between the two electrodes of the light bulb holder, and eventually lead to erosion and failure of the electrodes of the light bulb.

In order to avoid short circuit and ignition caused by water accumulation between the light bulb holder and socket, currently some commercially available lights improve the reliability of the connection between the light bulb holder and socket by increasing the creepage distance. Creepage distance, as an important indicator of light bulbs, refers to the shortest path between two conductive parts or between a conductive part and a protective interface of equipment measured along the surface of insulation. By doing so, although failure caused by water accumulation between the light bulb holder and socket may be reduced to a certain degree, since most of light bulb holders are connected to the socket by threads, after the light bulb holder is tightly threaded into the socket, the accumulation of water between the light bulb holder and the socket will be improved due to the threads of the light bulb holder and the socket, and the the viscosity of water. As a result, the accumulated water cannot be discharged out of the socket in time (for example, be discharged by natural evaporation or under the effect of gravity). Therefore, how to effectively modify the structure of the light bulb holder to facilitate discharge of the accumulated water between the light bulb holder and the socket without changing the overall structure of the light bulb holder while ensuring the waterproof performance and stability of the light bulb holder is a very practical issue in the art.

SUMMARY

In view of this, one objective of the present disclosure is to provide a light bulb holder structure having reliable structure, convenient installation, and can facilitate the discharge of water accumulated between the light bulb holder and the socket after installation and use, and a light bulb having same.

In order to realize the above-mentioned objective, the present disclosure proposes the following technical solutions.

A light bulb holder structure includes a bulb cap and a connector connected to one end of the bulb cap. The connector is made of insulating material, and a center of the connector is provided with a through hole for inserting a conductive element. A first end of the bulb cap is connectable with a light socket, and an outer circumferential wall of the bulb cap is provided with external threads connectable with the light socket. A second end of the bulb cap is connectable with a bulb housing. The outer circumferential wall of the bulb cap is provided with more than three grooves extending from the first end to the second end of the bulb cap.

As a possible implementation, further, the grooves are arranged at equal intervals around the outer circumferential wall of the bulb cap and form a circular array.

As a preferred implementation, preferably, a depth of the grooves is greater than a depth of the external threads.

As a preferred implementation, preferably, a difference between the depth of the grooves and the depth of the external threads ranges 0.2-0.5 mm.

As a possible implementation, further, a width of the grooves ranges 0.8-2 mm.

As a possible implementation, further, four grooves are provided.

As a preferred implementation, preferably, the connector is integrally formed on one end of the bulb cap. The center of the connector is provided with a protrusion extending in a direction away from the bulb cap. A center of the protrusion is provided with a through hole for inserting the conductive element. The first end of the bulb cap is provided with connection parts matched and connected with the connector. The connection parts are through holes or blind holes, and a threaded section of the connector is provided with convex parts at an end close to the bulb cap. The convex parts match with the connection parts in one-to-one correspondence and fill the connection parts. The grooves extends to the connector.

As a preferred implementation, preferably, the threaded section is provided on the connector at an end close to the bulb cap, and the threaded section matches with a structure of the first end of the bulb cap. Threads of the threaded section matches with the external threads.

As a preferred implementation, preferably, a length of the threaded section of the connector in an axial direction of the bulb cap is 0.1-0.3 times of a length of the bulb cap.

According to another aspect, the present disclosure also provides a light bulb, which has the above-mentioned light bulb holder structure.

According to the present disclosure, the bulb cap of the light bulb holder is provided with a plurality of grooves in a tactful manner, and the depth of the grooves is greater than that of the external threads of the bulb cap, such that after the bulb cap is mounted on the light bulb and the light bulb is mounted on the light socket, the water accumulated between the light bulb holder structure and the light socket can be effectively discharged through the grooves. As a result, failure of the insulator (connector) on the light bulb holder structure caused by water accumulation can be avoided to a certain extent, thereby improving the reliability and safety of the light bulb.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It is particularly pointed out that the following embodiments are only used to illustrate the present disclosure rather than limit the scope of the present disclosure. Likewise, the following embodiments constitute part of rather than all embodiments of the present disclosure, and all other embodiments derived by those of ordinary skill in the art without creative effort fall within the scope of protection of the present disclosure.

As shown inFIGS.1-5, the present embodiment provides a light bulb holder structure1, which includes a bulb cap11and a connector12connected to one end of the bulb cap11. The connector12is made of insulating material (for example, plastics or silicone). The center of the connector12is provided with a through hole121for inserting a conductive element (in practice, conductive element may be conductive rivet). A first end of the bulb cap11is connectable with a light socket4, and an outer circumferential wall of the bulb cap11is provided with external threads13connectable with the light socket4. A second end of the bulb cap11is connectable with a bulb housing2. The outer circumferential wall of the bulb cap11is provided with more than three grooves14extending from the first end to the second end of the bulb cap11. In the present embodiment, the quantity of the grooves14is four, and the grooves14are arranged at equal intervals around the outer circumferential wall of the bulb cap11and form a circular array.

Since when the external threads13on the bulb cap11are connected with the light socket4, the external threads13and the internal threads on the light socket4are engaged in a relatively tight state, and a narrow gap is formed therebetween. Therefore, in order to improve the reliability of the water discharge performance of the grooves14, in the present embodiment, the depth of the grooves14is greater than the depth of the external threads13. Preferably, the difference between the depth of the grooves14and the depth of the external threads13is 0.2-0.5 mm. The width of the grooves14is 0.8-2 mm.

Based onFIG.1and combined with what is shown inFIG.2toFIG.5, in the present embodiment, when the above-mentioned light holder structure1is assembled with a bulb to make a light bulb3, the grooves14do not penetrate through the inner wall of the bulb cap11. Therefore, the structural strength of the light bulb3will not be affected since the light bulb holder structure1is not the main stress bearing component. Since the depth of the grooves14is greater than the depth of the external threads13, after the light bulb3is mounted on the socket4, the grooves14can also effectively guide and discharge the water accumulated between the socket4and the light bulb3.

As shown inFIG.6, the structure of this embodiment is substantially the same as that of embodiment 1, the difference is that in this embodiment, the connector12is integrally formed at one end of the bulb cap11. The center of the connector12is provided with a protrusion extending in a direction away from the bulb cap11, and the center of the protrusion is provided with a through hole121for inserting a conductive element. One end of the bulb cap11is provided with connection parts111matched with the connector, and the connection parts111are through holes (or blind holes). A threaded section122of the connector12is provided with convex parts123at an end close to the bulb cap11. The convex parts123match with the connection parts111in one-to-one correspondence and fill the connection parts111. The grooves14extend to the connector12. Specifically, the grooves14straightly extend through the outer wall of the bulb cap11in length direction and further straightly extend through the outer wall of the connector12to a top surface of the connector where the protrusion is located.

According to the present embodiment, the threaded section122is provided on the connector12at an end close to the bulb cap11, and the threaded section122matches with a structure of the first end of the bulb cap11. Threads of the threaded section122matches with the external threads13. In terms of dimension, in the present embodiment, a length of the threaded section122of the connector12in an axial direction of the bulb cap11is 0.1-0.3 times of a length of the bulb cap11.

In this embodiment, the connector12is lengthened and protrudes outward, such that the creepage distance of the light is increased, which can further reduce the probability of failure caused due to water accumulation after installation and use.

The above descriptions merely involve part of the embodiments of the present disclosure, and are not intended to limit the scope of the present disclosure. Any equivalent device or equivalent process change made based on the contents of the description and drawings of the present disclosure, or same or similar structure directly or indirectly applied to other related technical fields should be considered as falling within the scope of protection of the present disclosure.