EP1486724B1 - T type quick-lock lampholder - Google Patents
T type quick-lock lampholder Download PDFInfo
- Publication number
- EP1486724B1 EP1486724B1 EP03013094A EP03013094A EP1486724B1 EP 1486724 B1 EP1486724 B1 EP 1486724B1 EP 03013094 A EP03013094 A EP 03013094A EP 03013094 A EP03013094 A EP 03013094A EP 1486724 B1 EP1486724 B1 EP 1486724B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- socket
- lamp holder
- cap
- connecting head
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
- F21V21/0824—Ground spikes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S4/00—Lighting devices or systems using a string or strip of light sources
- F21S4/10—Lighting devices or systems using a string or strip of light sources with light sources attached to loose electric cables, e.g. Christmas tree lights
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/06—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages the fastening being onto or by the lampholder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/006—Fastening of light sources or lamp holders of point-like light sources, e.g. incandescent or halogen lamps, with screw-threaded or bayonet base
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/002—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips making direct electrical contact, e.g. by piercing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
- F21V21/088—Clips; Clamps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
- F21V21/092—Suction devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/08—Devices for easy attachment to any desired place, e.g. clip, clamp, magnet
- F21V21/096—Magnetic devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/14—Adjustable mountings
- F21V21/26—Pivoted arms
- F21V21/28—Pivoted arms adjustable in more than one plane
- F21V21/29—Pivoted arms adjustable in more than one plane employing universal joints
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
- H01R33/05—Two-pole devices
- H01R33/22—Two-pole devices for screw type base, e.g. for lamp
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
- H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
- H01R4/2408—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation actuated by clamping screws
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/06—Bases for movable standing lamps; Fixing standards to the bases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
- H01R33/945—Holders with built-in electrical component
- H01R33/95—Holders with built-in electrical component with fuse; with thermal switch
Definitions
- the present invention relates to a lamp holder, and more particularly to a lamp holder that enables quick and even accurate piercing of an cable connected thereto without using any tool, and may have a fuse, a universal link, a spike, a lamp panel, or a lampshade connected thereto to provide different manners of use thereof.
- a conventional lamp holder including the lamp holder for a light string, has a structural design that requires traditional ways of assembling, such as fastening by means of screws, tenons and mortises, rivets, supersonic wave, glue, etc. with the help of suitable tools or machines.
- the conventional lamp holder has to be manufactured and assembled in a plant or factory.
- drawbacks are found in the use of the conventional lamp holders:
- Fig. 12 is a plan view of a currently available lamp holder. As shown, this type of lamp holder is provided at an upper part with piercing terminals that directly pierce through an cable to electrically connect the latter to the lamp holder to save the effort of stripping off the wire sheath.
- the piercing terminals may be located in the lamp holder at a desired height.
- the piercing terminals are embedded in a hole in the lamp holder. An cable is connected to the lamp holder by forcing it into the hole to be pierced through by the piercing terminals. And, a barb on each of the piercing terminals functions to retain the cable in the hole.
- the US 3,148,009 discloses an electric lamp having a base with a pair of terminal pins, a socket for said lamp having receptacles for removably receiving said pins, said socket having a body, the body having an open ended chamber for receiving said lamp base and a transverse wall forming a bottom of said chamber, an end of said body opposite said chamber being formed with a diametrically extending groove cutting a predetermined distance into said transverse wall, a length of insulated dual conductor cord extending through said groove and lying flat against the bottom thereof, a cap removably engaging said opposite body end closing said groove and retaining said dual conductor cord therein, a pair of spaced openings centralized to register with the lamp terminal pins and extending through said transverse wall communicating said chamber with said groove, each opening having a lateral slot extending in opposite directions transversely of said groove and communicating therewith, a terminal fitting including said terminal pin receptacle seated in each opening and having a laterally offset insulation piercing prong seated
- a neck extends from the underside of the transverse wall having external threads for engaging internal threads of the cap.
- the cap is threaded onto the neck whereby the central boss enters the groove.
- the central boss acting as a pressure element is forced against the conductor cord causing the insulation piercing prongs to pierce the insulation and make electrical contact with the conductor cord.
- a passageway is formed at the bottom of the groove when the cap is completely closed, that is, when a cap edge abuts a shoulder of the socket, the passageway being proportioned with respect to the conductor cord to receive the latter in a confined condition under pressure at opposite ends thereof by a cap edge and in the central portion by the boss.
- a primary object of the present invention is to provide a lamp holder, to which an cable may be easily connected without using any tool.
- the lamp holder is so structured that it enables even application of force in the same direction to three serial points on the cable assembled thereto, so that the cable is quickly and accurately pierced through and accordingly, electrically connected to the lamp holder without the risks of becoming misaligned with or skidded off the piercing terminals.
- Another object of the present invention is to provide an improved lamp holder that is adapted to associate with different fixtures, such as a sucker, a magnet, a universal link, a spike, a lamp panel, a lampshade, etc., to enable a wide range of applications thereof.
- fixtures such as a sucker, a magnet, a universal link, a spike, a lamp panel, a lampshade, etc.
- a further object of the present invention is to provide an improved lamp holder having a fuse-connected piercing terminal that can be replaced at any time to ensure the safety in using the lamp holder.
- the lamp holder of the present invention mainly includes a socket and a cap.
- the socket is internally provided at predetermined positions near a rear end thereof with piercing terminals for directly piercing through an cable assembled to the socket and thereby electrically connecting the cable to the lamp holder.
- the socket is also formed at the rear end with an axially extended and externally threaded first connecting head and a rear flange radially outward extended from a root of the first connecting head.
- Two wiring notches are oppositely provided on the first connecting head, and a sunken wire groove is provided on the rear end and the rear flange of the socket to extend between the two wiring notches.
- the wire groove is provided at predetermined positions on a bottom thereof with openings, via which the piercing terminals in the socket are outward projected.
- the cap is internally provided with screw threads for engaging with the externally threaded first connecting head of the socket, and has a top recess to provide a bottom surface adapted to press against the cable positioned in the wire groove.
- the cap has a cap flange radially outward extended from a periphery of an end of the cap facing toward the socket.
- the bottom surface of the top recess of the cap and two areas of the cap flange at two opposite sides of the bottom surface together compress against the cable to evenly apply forces in the same direction to three serial points, that is, a front, a middle, and a rear point, on the cable, so that the cable is quickly pierced through by the piercing terminals projected from the wire groove without becoming misaligned with or skidded off the piercing terminals.
- One of the piercing terminals may be connected to a auto-reset fuse to ensure the safety in using the lamp holder.
- the top recess of the cap is provided with a universal socket for connecting to a universal joint ball provided at an end of a universal link, such that the lamp holder may be turned by 360 degrees or adjusted to different height relative to a fixed location after the universal link is connected at another end to the fixed location.
- the lamp holder may therefore be used at different places for different purposes, such as a decorative illumination on a signboard, in a show window, on an exterior wall of a building, or in a garden, or as a general lighting fixture in offices, or other working places, or on streets.
- the lamp holder mainly includes a socket 1 and a cap 2.
- the socket 1 is internally provided at predetermined positions near a rear end thereof with piercing terminals 8, which are adapted to directly pierce through an cable 7 assembled to the rear end of the socket 1 and pressed against the piercing terminals 8 (see Fig. 4) and thereby save a user' s efforts of stripping the wire to electrically connect the wire to the lamp holder.
- the socket 1 is formed at the rear end with an axially extended first connecting head 11, which is externally provided with screw threads 12, and a rear flange 17 radially outward extended from a root of the first connecting head 11.
- Two wiring notches 13 are oppositely provided on the first connecting head 11, and a sunken wire groove 14 is provided on the rear end and the rear flange 17 of the socket 1 to extend between the two wiring notches 13.
- the wire groove 14 is provided at predetermined positions on a bottom thereof with openings 15, from which the piercing terminals 8 in the socket 1 are outward projected.
- the cap 2 is provided with internal screw threads 21 that can mesh with the external screw threads 12 on the first connecting head 11 to lock the cap 2 to the rear end of the socket 1.
- the cap 2 has a top recess having a complete bottom surface 22 facing toward the piercing terminals 8, and a cap flange 23 radially outward extended from a periphery of an end of the cap 2 facing toward the socket 1.
- Figs. 1 and 4 Please refer to Figs. 1 and 4.
- To assemble the cable 7 to the lamp holder simply position the cable 7 in the wiring notches 13 and the sunken wire groove 14 and tighten the cap 2 to the first connecting head 11 of the socket 1. While the cap 2 is gradually tightened against the first connecting head 11, the bottom surface 22 of the cap 2 and two areas 231, 232 of the cap flange 23 at two opposite sides of the bottom surface 22 together compress against the cable 7 to evenly apply forces in the same direction to three serial points, that is, a front, a middle, and a rear point, on the cable 7, as a result of the principle of clamp thread. The cable 7 is therefore quickly in contact with the piercing terminals 8 projected from the openings 15 on the wire groove 14.
- the cable 7 When the cable 7 is pierced through by the piercing terminals 8, it is electrically connected to the lamp holder. Since the cable 7 is positioned in the wire groove 14 and subject to even forces applied thereto in the same direction and to three serial points thereon, the problem of an cable misaligned with or skidded off the piercing terminals 8 could be avoided. That is, the cable 7 may be quickly located on the socket 1 and accurately pierced to electrically connect to the lamp holder without the risk of being incompletely pierced to cause a poor connection.
- the wire groove 14 may be further provided with a replacement opening 16, and one of the piercing terminals 8 is connected to a auto-reset fuse 81.
- the fuse-connected piercing terminal 8 is adapted to provide an overcurrent protection, making the lamp holder of the present invention safer for use.
- the fuse 81 is burnt out, it may be replaced via the replacement opening 16.
- the socket 1 may further include an externally threaded second connecting head 18 axially extended from a front end of the socket 1 for an internally threaded shade ring 3 to screw thereto.
- the socket 1 is provided around a root of the second connecting head 18 with a radially extended front flange 19, and the shade ring 3 is provided around an end facing toward the socket 1 with a ring flange 31.
- the socket 1 may be conveniently mounted in an orifice provided on a metal or a wooden signboard 6 through engagement of the second connecting head 18 with the threaded shade ring 3 separately located at rear and front sides of the orifice on the signboard 6, as shown in Fig.
- the lamp holder of the present invention may have changeful appearances for use as decorative illumination or general lighting fixtures in offices and many other working places.
- the cap 2 is provided in the top recess with a universal socket 29.
- a universal link 50 having universal joints 53 provided at two ends thereof to separately connect a universal joint ball 51 and a two-jaw chuck 52 may be connected at the universal joint ball 51 to the universal socket 29 on the cap 2, as shown in Fig. 9, so that the lamp holder may be turned by 360 degrees and adjusted to different heights relative to the universal link 50 as desired.
- the lamp holder may also be conveniently hung on a tree by firmly clamping the two-jaw chuck 52 to, for example, a branch of the tree.
- a reflector lamp is mounted on the lamp holder connected to the universal link 50, it may be used as show window lighting or track lighting.
- Fig. 10 shows the lamp holder of the present invention is connected at the universal socket 29 on the cap 2 to the universal link 50 having a spike 56 connected to one end thereof.
- the lamp holder may be used outdoors as general garden lighting.
- the lamp holder of the present invention may be connected at the universal socket 29 to a sucker 54 or a magnet 55 via the universal joint ball 51.
- a plurality of lamp holders may be attached to a glass or metal surface via their respective sucker 54 or magnet 55, respectively, for forming desired designs, patterns, or letters on the metal or wooden surface.
- the lamp holder of the present invention has the following advantages:
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Description
- The present invention relates to a lamp holder, and more particularly to a lamp holder that enables quick and even accurate piercing of an cable connected thereto without using any tool, and may have a fuse, a universal link, a spike, a lamp panel, or a lampshade connected thereto to provide different manners of use thereof.
- Generally, a conventional lamp holder, including the lamp holder for a light string, has a structural design that requires traditional ways of assembling, such as fastening by means of screws, tenons and mortises, rivets, supersonic wave, glue, etc. with the help of suitable tools or machines. Thus, the conventional lamp holder has to be manufactured and assembled in a plant or factory. Moreover, following drawbacks are found in the use of the conventional lamp holders:
- 1. The conventional lamp holders for a light string have fixed specifications and are arranged on the light string at fixed intervals. Therefore, the conventional lamp holders could not be arranged to show special patterns according to specific ornaments to be decorated or personal preference. The light string using the conventional lamp holders are therefore normally used in Christmastime and other festivals only.
- 2. The conventional lamp holders are not provided with overcurrent protective means, and are therefore not safe for use. There are chances lamp bulbs of high wattage are mounted on the conventional lamp holders to result in overloaded wires and burnt out lamp bulbs.
- 3. The conventional lamp holders are not provided with means for well fixing the lamp holders to wall panels or other mounting surfaces. Most conventional lamp holders for use outdoors are simply seated in holes or hung on hangers or fixed with nails provided on the wall panels or mounting surfaces. And, it is uneasy to control the length of cables connected to the lamp holders. The lamp holders under strong wind tend to swing and break due to collision with the walls or mounting surfaces, resulting in dark portions on the wall or object surfaces decorated with lamp bulbs to spoil the overall beauty of the decorated walls or objects.
- Fig. 12 is a plan view of a currently available lamp holder. As shown, this type of lamp holder is provided at an upper part with piercing terminals that directly pierce through an cable to electrically connect the latter to the lamp holder to save the effort of stripping off the wire sheath. The piercing terminals may be located in the lamp holder at a desired height. In a common practice, the piercing terminals are embedded in a hole in the lamp holder. An cable is connected to the lamp holder by forcing it into the hole to be pierced through by the piercing terminals. And, a barb on each of the piercing terminals functions to retain the cable in the hole. However, in using this type of lamp holder with piercing terminals, it is frequently found the cable is not effectively pierced to electrically connect the lamp holder to conductors in the cable, or the cable subject to an external force tends to separate from the lamp holder easily.
- In an improved version of the above-described conventional lamp holder with piercing terminals provided near an open top thereof, screw holes are further provided on the lamp holder close to the piercing terminals. The cable is pressed against the open top of the lamp holder with a hold-down cap. Screws are then extended through the screw holes to force the cable against the piercing terminals, so that the cable is pierced through and fixed in place in the lamp holder by the piercing terminals. This improved type of lamp holder enables better wire connection but requires tools to complete the assembling of the cable to the lamp holder. Moreover, since the screws at two sides of the cable are sequentially tightened, it is possible the cable is not evenly forced against the piercing terminals to result in a misaligned, skidded, or inaccurately pierced cable.
- The
US 3,148,009 discloses an electric lamp having a base with a pair of terminal pins, a socket for said lamp having receptacles for removably receiving said pins, said socket having a body, the body having an open ended chamber for receiving said lamp base and a transverse wall forming a bottom of said chamber, an end of said body opposite said chamber being formed with a diametrically extending groove cutting a predetermined distance into said transverse wall, a length of insulated dual conductor cord extending through said groove and lying flat against the bottom thereof, a cap removably engaging said opposite body end closing said groove and retaining said dual conductor cord therein, a pair of spaced openings centralized to register with the lamp terminal pins and extending through said transverse wall communicating said chamber with said groove, each opening having a lateral slot extending in opposite directions transversely of said groove and communicating therewith, a terminal fitting including said terminal pin receptacle seated in each opening and having a laterally offset insulation piercing prong seated in said slot, said cap having a central boss extending into said groove urging the conductor cord against the groove bottom and retaining the cord in electrical contact with said prongs, and fastening means secured in said transverse wall retaining said terminal fittings in said openings and slots upon removal of said cap and disengagement of said conductor cord therefrom.
A neck extends from the underside of the transverse wall having external threads for engaging internal threads of the cap. The cap is threaded onto the neck whereby the central boss enters the groove. As cap is tightened, the central boss acting as a pressure element is forced against the conductor cord causing the insulation piercing prongs to pierce the insulation and make electrical contact with the conductor cord. A passageway is formed at the bottom of the groove when the cap is completely closed, that is, when a cap edge abuts a shoulder of the socket, the passageway being proportioned with respect to the conductor cord to receive the latter in a confined condition under pressure at opposite ends thereof by a cap edge and in the central portion by the boss. - To insure a well distributed pressure, a sufficient pressure area is necessary. This lamp holder only provides a small effective pressure area. To enlarge the pressure area, the entire diameter of the socket and the cap have to be increased resulting in a material and cost expensive construction.
- In addition, these conventional lamp holders have fixed structure and appearance for use in some fixed manners. They are not adapted to associate with other types of fixtures for decorating at different places, and therefore have limited applications.
- It is therefore tried by the inventor to develop an improved lamp holder to overcome the drawbacks existed in the conventional lamp holders.
- A primary object of the present invention is to provide a lamp holder, to which an cable may be easily connected without using any tool. The lamp holder is so structured that it enables even application of force in the same direction to three serial points on the cable assembled thereto, so that the cable is quickly and accurately pierced through and accordingly, electrically connected to the lamp holder without the risks of becoming misaligned with or skidded off the piercing terminals.
- Another object of the present invention is to provide an improved lamp holder that is adapted to associate with different fixtures, such as a sucker, a magnet, a universal link, a spike, a lamp panel, a lampshade, etc., to enable a wide range of applications thereof.
- A further object of the present invention is to provide an improved lamp holder having a fuse-connected piercing terminal that can be replaced at any time to ensure the safety in using the lamp holder.
- To achieve the above and other objects, the lamp holder of the present invention mainly includes a socket and a cap.
- The socket is internally provided at predetermined positions near a rear end thereof with piercing terminals for directly piercing through an cable assembled to the socket and thereby electrically connecting the cable to the lamp holder. The socket is also formed at the rear end with an axially extended and externally threaded first connecting head and a rear flange radially outward extended from a root of the first connecting head. Two wiring notches are oppositely provided on the first connecting head, and a sunken wire groove is provided on the rear end and the rear flange of the socket to extend between the two wiring notches. The wire groove is provided at predetermined positions on a bottom thereof with openings, via which the piercing terminals in the socket are outward projected.
- The cap is internally provided with screw threads for engaging with the externally threaded first connecting head of the socket, and has a top recess to provide a bottom surface adapted to press against the cable positioned in the wire groove. The cap has a cap flange radially outward extended from a periphery of an end of the cap facing toward the socket.
- When the cable is connected to the lamp holder by positioning the cable in the sunken wire groove and tightening the cap to the first connecting head of the socket, the bottom surface of the top recess of the cap and two areas of the cap flange at two opposite sides of the bottom surface together compress against the cable to evenly apply forces in the same direction to three serial points, that is, a front, a middle, and a rear point, on the cable, so that the cable is quickly pierced through by the piercing terminals projected from the wire groove without becoming misaligned with or skidded off the piercing terminals.
- One of the piercing terminals may be connected to a auto-reset fuse to ensure the safety in using the lamp holder.
- The top recess of the cap is provided with a universal socket for connecting to a universal joint ball provided at an end of a universal link, such that the lamp holder may be turned by 360 degrees or adjusted to different height relative to a fixed location after the universal link is connected at another end to the fixed location. The lamp holder may therefore be used at different places for different purposes, such as a decorative illumination on a signboard, in a show window, on an exterior wall of a building, or in a garden, or as a general lighting fixture in offices, or other working places, or on streets.
- The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
- Fig. 1 is an exploded perspective view of a lamp holder according to an embodiment of the present invention;
- Fig. 2 is an assembled perspective view of Fig. 1;
- Fig. 3 is an assembled sectional view of Fig. 2 with a lamp bulb connected thereto;
- Fig. 4 shows the manner of connecting an cable to the lamp holder of the present invention;
- Fig. 5 shows the lamp holder of the present invention having a replaceable fuse-connectedpiercing terminal;
- Fig. 6 shows the manner of mounting the lamp holder of the present invention on an orifice plate;
- Fig. 7 shows the lamp holder of the present invention having a lamp panel connected thereto;
- Fig. 8 shows the lamp holder of the present invention having a lamp panel and a lampshade connected thereto;
- Fig. 9 shows the lamp holder of the present invention is connected to a universal link having a two-jaw chuck provided at a free end thereof;
- Fig. 10 shows the lamp holder of the present invention is connected to a universal link having a spike provided at a free end thereof;
- Fig. 11 shows the lamp holder of the present invention may be connected to a sucker or a magnet via a universal-joint ball; and
- Fig. 12 is a plan view of a conventional lamp holder.
- Please refer to Figs. 1, 2, and 3 in which a lamp holder according to an embodiment of the present invention is shown. The lamp holder mainly includes a
socket 1 and acap 2. Thesocket 1 is internally provided at predetermined positions near a rear end thereof with piercingterminals 8, which are adapted to directly pierce through an cable 7 assembled to the rear end of thesocket 1 and pressed against the piercing terminals 8 (see Fig. 4) and thereby save a user' s efforts of stripping the wire to electrically connect the wire to the lamp holder. Thesocket 1 is formed at the rear end with an axially extended first connectinghead 11, which is externally provided withscrew threads 12, and arear flange 17 radially outward extended from a root of the first connectinghead 11. Twowiring notches 13 are oppositely provided on the first connectinghead 11, and asunken wire groove 14 is provided on the rear end and therear flange 17 of thesocket 1 to extend between the twowiring notches 13. Thewire groove 14 is provided at predetermined positions on a bottom thereof withopenings 15, from which the piercingterminals 8 in thesocket 1 are outward projected. - The
cap 2 is provided withinternal screw threads 21 that can mesh with theexternal screw threads 12 on the first connectinghead 11 to lock thecap 2 to the rear end of thesocket 1. As can be clearly seen from Fig. 3, thecap 2 has a top recess having acomplete bottom surface 22 facing toward the piercingterminals 8, and acap flange 23 radially outward extended from a periphery of an end of thecap 2 facing toward thesocket 1. - Please refer to Figs. 1 and 4. To assemble the cable 7 to the lamp holder, simply position the cable 7 in the
wiring notches 13 and thesunken wire groove 14 and tighten thecap 2 to the first connectinghead 11 of thesocket 1. While thecap 2 is gradually tightened against the first connectinghead 11, thebottom surface 22 of thecap 2 and twoareas 231, 232 of thecap flange 23 at two opposite sides of thebottom surface 22 together compress against the cable 7 to evenly apply forces in the same direction to three serial points, that is, a front, a middle, and a rear point, on the cable 7, as a result of the principle of clamp thread. The cable 7 is therefore quickly in contact with the piercingterminals 8 projected from theopenings 15 on thewire groove 14. When the cable 7 is pierced through by the piercingterminals 8, it is electrically connected to the lamp holder. Since the cable 7 is positioned in thewire groove 14 and subject to even forces applied thereto in the same direction and to three serial points thereon, the problem of an cable misaligned with or skidded off the piercingterminals 8 could be avoided. That is, the cable 7 may be quickly located on thesocket 1 and accurately pierced to electrically connect to the lamp holder without the risk of being incompletely pierced to cause a poor connection. - Please refer to Fig. 5. To ensure the safety in using the lamp holder of the present invention, the
wire groove 14 may be further provided with areplacement opening 16, and one of the piercingterminals 8 is connected to a auto-reset fuse 81. In the event a lamp bulb having a high wattage is wrongly connected to the lamp holder, the fuse-connectedpiercing terminal 8 is adapted to provide an overcurrent protection, making the lamp holder of the present invention safer for use. In the event thefuse 81 is burnt out, it may be replaced via thereplacement opening 16. - Please refer back to Figs. 1 to 3. The
socket 1 may further include an externally threaded second connectinghead 18 axially extended from a front end of thesocket 1 for an internally threadedshade ring 3 to screw thereto. In this case, thesocket 1 is provided around a root of the second connectinghead 18 with a radially extendedfront flange 19, and theshade ring 3 is provided around an end facing toward thesocket 1 with aring flange 31. With the second connectinghead 18 and the threadedshade ring 3, thesocket 1 may be conveniently mounted in an orifice provided on a metal or awooden signboard 6 through engagement of the second connectinghead 18 with the threadedshade ring 3 separately located at rear and front sides of the orifice on thesignboard 6, as shown in Fig. 6; or have alamp panel 41 connected to thesocket 1 by clamping a rear end of thelamp panel 41 between thefront flange 19 of thesocket 1 and thering flange 31 of the threadedshade ring 3, as shown in Fig. 7; or further have alampshade 42 connected to a front opening of thelamp panel 41, as shown in Fig. 8. In brief, the lamp holder of the present invention may have changeful appearances for use as decorative illumination or general lighting fixtures in offices and many other working places. - As can be clearly seen from Fig. 1, the
cap 2 is provided in the top recess with auniversal socket 29. Auniversal link 50 havinguniversal joints 53 provided at two ends thereof to separately connect a universaljoint ball 51 and a two-jaw chuck 52 may be connected at the universaljoint ball 51 to theuniversal socket 29 on thecap 2, as shown in Fig. 9, so that the lamp holder may be turned by 360 degrees and adjusted to different heights relative to theuniversal link 50 as desired. The lamp holder may also be conveniently hung on a tree by firmly clamping the two-jaw chuck 52 to, for example, a branch of the tree. When a reflector lamp is mounted on the lamp holder connected to theuniversal link 50, it may be used as show window lighting or track lighting. - Fig. 10 shows the lamp holder of the present invention is connected at the
universal socket 29 on thecap 2 to theuniversal link 50 having aspike 56 connected to one end thereof. In this manner, the lamp holder may be used outdoors as general garden lighting. - Alternatively, the lamp holder of the present invention may be connected at the
universal socket 29 to asucker 54 or amagnet 55 via the universaljoint ball 51. In this manner, a plurality of lamp holders may be attached to a glass or metal surface via theirrespective sucker 54 ormagnet 55, respectively, for forming desired designs, patterns, or letters on the metal or wooden surface. - In conclusion, the lamp holder of the present invention has the following advantages:
- 1. It can be easily and quickly connected to the cable without using any tool or machine, and is therefore a good do-it-yourself (DIY) product to meet most consumers' requirement.
- 2. It has simple mechanical and electrical structures and provides enhanced safety for use as compared with conventional lamp holders that use traditional ways to connect to the cable.
- 3.It has a complete design for a wide range of applications, including light string for festivals, decorative illumination for signboards, showwindows, building exterior walls, gardens, offices, different types of working places, streets, etc., and general lighting fixtures.
- 4.The lamp holders may be connected to the cable at variable intervals according to actual mounting positions thereof, and may be quickly fixed in place without troublesome wiring. The lamp holders may also be easily dismounted from the cable 7 and be used repeatedly, and are therefore environmental friendly.
Claims (8)
- A lamp holder comprising a socket (1) and a cap (2);
said socket (1) being internally provided at predetermined positions near a rear end thereof with piercing terminals (8) for directly piercing through a cable assembled to the rear end of said socket (1) and thereby electrically connecting said cable to said lamp holder, said socket (1) also being provided at the rear end with an axially extended and externally threaded first connecting head (11) two wiring notches (13) being oppositely provided on said first connecting head (11),
said cap (2) being internally provided with screw threads (21) for engaging with said externally threaded first connecting head (11), and having a top recess that has a bottom surface (22) adapted to press against said cable positioned in said wire groove
characterized by a rear flange (17) radially outward extended from a root of said first connecting head (11); two wiring notches (13) being oppositely provided on said first connecting head (11) and a sunken wire groove (14) being provided on the rear end and said rear flange (17) of said socket to extend between said two wiring notches (13); and said wire groove (14) being provided at predetermined positions on a bottom thereof with openings (15), from which said piercing terminals (8) in said socket (1) are outward projected and said cap having a cap flange (23) radially outward extended from a periphery of an end of said cap (2) facing toward said socket (1) and wherein said cap (2) is provided in said top recess with a universal socket (29) adapted to receive a universal joint ball (51) provided at an end of a universal link (50), and said universal link being provided at another end with a fixing device (52). - The lamp holder as claimed in claim 1, wherein said socket (1) further includes a second connecting head (18) that is externally threaded and axially extended from a front end of said socket for an internally threaded shade ring (3) to screw thereto, and a front flange (19) radially extended from a root of said second connecting head (18); and said shade ring (3) being provided around an end facing toward said socket (1) with a ring flange (31).
- The lamp holder as claimed in claim 1 wherein said fixing device comprises a chuck (52).
- The lamp holder as claimed in claim 1, wherein said fixing device is in the form of a spike (56).
- The lamp holder as claimed in claim 1, wherein said fixing device comprises a sucker (54).
- The lamp holder as claimed in claim 1, wherein said fixing device comprises a magnet (55).
- The lamp holder as claimed in claim 2, further comprising a lamp panel (41) and a lampshade (42); said lamp panel (41) having a first end movably clamped between said front flange (19) on said socket (1) and said ring flange (31) on said shade ring (3) screwed onto said second connecting head (18) of said socket (1), and a second end to which said lampshade (42) is detachably connected.
- The lamp holder as claimed in claim 1, wherein said wire groove (14) on said socket (1) is provided with a replacement opening (16), and one of said piercing terminals (8) is connected to a auto-reset fuse (81), such that said fuse-connected piercing terminal (8) is replaceable via said replacement opening (16).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03013094A EP1486724B1 (en) | 2003-06-10 | 2003-06-10 | T type quick-lock lampholder |
DE60315608T DE60315608T2 (en) | 2003-06-10 | 2003-06-10 | Quick-release lamp holder in T version |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03013094A EP1486724B1 (en) | 2003-06-10 | 2003-06-10 | T type quick-lock lampholder |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1486724A1 EP1486724A1 (en) | 2004-12-15 |
EP1486724B1 true EP1486724B1 (en) | 2007-08-15 |
Family
ID=33185863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03013094A Expired - Lifetime EP1486724B1 (en) | 2003-06-10 | 2003-06-10 | T type quick-lock lampholder |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1486724B1 (en) |
DE (1) | DE60315608T2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4501915B2 (en) * | 2006-03-20 | 2010-07-14 | ウシオ電機株式会社 | Discharge lamp holding mechanism |
WO2013048277A1 (en) * | 2011-09-30 | 2013-04-04 | Общество с ограниченной ответственностью "ДиС ПЛЮС" | Light emitting diode assembly |
EP3686487A1 (en) * | 2019-01-28 | 2020-07-29 | Magnetico srl | Magnetic lampholder |
US11333309B1 (en) * | 2021-03-30 | 2022-05-17 | Nu Tsai Capital | Magnetic decorative lighting |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3148009A (en) * | 1962-09-19 | 1964-09-08 | Raylite Electric Corp | Combination pin-type lamp and insulation piercing attachment socket construction |
NZ194040A (en) * | 1979-06-13 | 1983-12-16 | Strix Ltd | Insulation piercing electrical connector |
US5954425A (en) * | 1997-10-11 | 1999-09-21 | Lin; Mei-Lu | Waterproof lamp socket |
-
2003
- 2003-06-10 DE DE60315608T patent/DE60315608T2/en not_active Expired - Lifetime
- 2003-06-10 EP EP03013094A patent/EP1486724B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
DE60315608T2 (en) | 2008-06-05 |
DE60315608D1 (en) | 2007-09-27 |
EP1486724A1 (en) | 2004-12-15 |
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