EP0693654B1 - Device for fixing bulb-sockets to the base of lamps - Google Patents
Device for fixing bulb-sockets to the base of lamps Download PDFInfo
- Publication number
- EP0693654B1 EP0693654B1 EP19950111196 EP95111196A EP0693654B1 EP 0693654 B1 EP0693654 B1 EP 0693654B1 EP 19950111196 EP19950111196 EP 19950111196 EP 95111196 A EP95111196 A EP 95111196A EP 0693654 B1 EP0693654 B1 EP 0693654B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lateral surface
- flap
- hole
- flaps
- push
- 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
Links
- 230000037431 insertion Effects 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims 1
- 238000010292 electrical insulation Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
Images
Classifications
-
- 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
- F21V23/00—Arrangement of electric circuit elements in or on lighting 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
- F21V27/00—Cable-stowing arrangements structurally associated with lighting devices, e.g. reels
-
- 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
- H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
Definitions
- the present invention relates to a device for fixing bulb-sockets to the base of lamps.
- a tubular body known as stem
- said tubular body being usually made of metal, inserted in a hole appropriately provided in the base of the lamp, and locked inside said hole by glueing or by means of two self-tapping screws.
- the cap of the bulb-socket that is to say, the end of the bulb-socket to be associated with the base of the lamp, is then assembled and is locked on the stem by glueing or with a special rotation-preventing device optionally provided on the cap of the bulb-socket.
- the power cord of the lamp passes through the stem; if said stem is metallic, it requires the use of insulators in order to achieve the correct electrical insulation of the lamp body.
- WO 88/08103 discloses a device for fixing bulb-sockets to the base of lamps, as claimed in the preamble of claim 1.
- DE-U-89 12 234 discloses a device in lampholders.
- the aim of the present invention is to provide a device for fixing bulb-sockets to the base of lamps very simply and quickly and for effectively clamping the lamp power cord, offering the greatest assurances in terms of electrical insulation of the lamp body.
- an object of the invention is to provide a device which, by reducing the time required to assemble the bulb-socket to the base of lamps, allows considerable savings in their overall production costs.
- the device according to the invention comprises a body 2, made of electrically insulating material, that has an elongated shape, preferably cylindrical, and is crossed axially by a passage 3 for an electric power supply cord 4.
- the body 2 is connected to the cap 5 of a bulb-socket 6 and is preferably produced by directly molding synthetic material monolithically with the cap 5 of the bulb-socket 6.
- the body 2 has, on its lateral surface, push-fitting engagement means engageable inside a hole 7 formed in the base 8 of the lamp.
- the push-fitting engagement means comprise teeth 9 formed on the lateral surface of the body 2 and shaped so as to facilitate the insertion of the body 2 inside the hole 7 and contrast its extraction from said hole 7 after insertion.
- the teeth 9 run substantially along the entire lateral surface of the body 2, with the exception of two diametrically opposite flat regions 10a and 10b. Ribs 11 are provided at said regions 10a and 10b, run parallel to the axis 2a of the body 2, and contrast the rotation of the body 2 inside the hole 7.
- the push-fitting engagement means comprise two flaps 12a and 12b protruding from the lateral surface of the body 2 in two mutually diametrically opposite regions, preferably offset by 90° with respect to the regions 10a and 10b, about the axis 2a of the body 2.
- the flaps 12a and 12b are flexible and are arranged at openings 13a and 13b formed in the lateral surface of the body 2, so that the flaps 12a and 12b, rigidly coupled to the remaining part of the body 2 at their lower end, can flex, by virtue of their elasticity, towards the axis 2a of the body 2 when the body 2 is inserted into the hole 7.
- the flaps 12a and 12b can also be provided with teeth 14 on their outer lateral surface.
- a stiffening rib 23 extending from the side of the lower end of the corresponding flap to the remaining part of the body 2.
- the device according to the invention comprises means for clamping the electric power cord 4 which are provided so that the electric power cord is locked inside the body 2 when said body 2 is inserted into the hole 7.
- said means for clamping the power cord 4 are constituted by teeth 15 formed on the surface of the flaps 12a and 12b that is directed towards the axis 2a of the body 2.
- Said teeth 15 are shaped so as to contrast the extraction of the electric power cord 4 in the opposite direction with respect to the bulb-socket 6.
- the teeth 15 formed on the flaps 12a and 12b can be arranged mutually opposite or can be offset, so as to constitute a sort of labyrinth when the flaps 12a and 12b are mutually close.
- the end of the body 2 that lies opposite to the cap, that is to say, the end to be inserted into the hole 7, has a tapering portion 16.
- the cap 5, as regards its part lying outside the base 8, can be configured in a per se known manner and is not described in more detail for the sake of simplicity.
- the power cord 4 is inserted beforehand through the passage 3 formed in the body 2.
- the body 2 is then inserted by pushing inside the hole 7.
- the insertion of the body 2 into the hole 7 produces the push-fitting engagement of the teeth 9 and of the teeth 14 against the side walls of the hole 7, ensuring the push-fitting locking of the body 2 inside the hole 7 and thus firmly coupling the cap 5 to the base 8 of the lamp.
- the insertion of the body 2 inside the hole 7 also produces the flexing of the flaps 12a and 12b towards the axis of the body 2 and thus also clamps the electric power cord 4 inside the body 2.
- the device according to the invention fully achieves the intended aim, since it allows to assemble the bulb-socket on the base of lamps in very short times, simply requiring push-fitting insertion, and simultaneously clamping the electric power cord, at the same time ensuring optimum electrical insulation.
- the materials employed may be any according to the requirements and the state of the art.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Description
- The present invention relates to a device for fixing bulb-sockets to the base of lamps.
- It is known that a tubular body, known as stem, is currently used to fix bulb-sockets to the base of lamps, said tubular body being usually made of metal, inserted in a hole appropriately provided in the base of the lamp, and locked inside said hole by glueing or by means of two self-tapping screws.
- The cap of the bulb-socket, that is to say, the end of the bulb-socket to be associated with the base of the lamp, is then assembled and is locked on the stem by glueing or with a special rotation-preventing device optionally provided on the cap of the bulb-socket.
- The power cord of the lamp passes through the stem; if said stem is metallic, it requires the use of insulators in order to achieve the correct electrical insulation of the lamp body.
- Furthermore, with currently commercially available bulb-socket fixing devices it is necessary to provide for a cord clamp that prevents the sliding of the cord with respect to the base of the lamp, discharging thereonto the traction prescribed by statutory provisions regarding luminaires.
- Assembly of the bulb-socket to the base of lamps with currently commercially available fixing devices is therefore relatively complicated and considerably affects the overall assembly time of the lamp and consequently the production costs.
- WO 88/08103 discloses a device for fixing bulb-sockets to the base of lamps, as claimed in the preamble of claim 1.
- DE-U-89 12 234 discloses a device in lampholders.
- The aim of the present invention is to provide a device for fixing bulb-sockets to the base of lamps very simply and quickly and for effectively clamping the lamp power cord, offering the greatest assurances in terms of electrical insulation of the lamp body.
- Within the scope of this aim, an object of the invention is to provide a device which, by reducing the time required to assemble the bulb-socket to the base of lamps, allows considerable savings in their overall production costs.
- This aim, these objects, and others which will become apparent hereinafter are achieved by a device for fixing bulb-sockets to the base of lamps, as defined in claim 1.
- Further characteristics and advantages will become apparent from the following detailed description of a device according to the invention, illustrated only by way of non-limitative example in the accompanying drawings, wherein:
- Fig. 1 is a partially sectional view, taken along a longitudinal plane, of the device according to the present invention, applied to the base of a lamp;
- Fig. 2 is a perspective view of the device according to the invention;
- Fig. 3 is a top plan view of the cap of the bulb-socket with the device according to the invention;
- Fig. 4 is a bottom plan view of the cap of the bulb-socket with the device according to the invention;
- Fig. 5 is a sectional view of Fig. 4, taken along the plane V-V;
- Fig. 6 is a sectional view of Fig. 5, taken along the plane VI-VI;
- Fig. 7 is an enlarged-scale sectional view of Fig. 3, taken along the plane VII-VII; and
- Fig. 8 is a sectional view of Fig. 6, taken along the plane VIII-VIII.
-
- With reference to the above figures, the device according to the invention, generally designated by the reference numeral 1, comprises a
body 2, made of electrically insulating material, that has an elongated shape, preferably cylindrical, and is crossed axially by apassage 3 for an electricpower supply cord 4. Thebody 2 is connected to thecap 5 of a bulb-socket 6 and is preferably produced by directly molding synthetic material monolithically with thecap 5 of the bulb-socket 6. - The
body 2 has, on its lateral surface, push-fitting engagement means engageable inside a hole 7 formed in thebase 8 of the lamp. - Conveniently, the push-fitting engagement means comprise
teeth 9 formed on the lateral surface of thebody 2 and shaped so as to facilitate the insertion of thebody 2 inside the hole 7 and contrast its extraction from said hole 7 after insertion. - The
teeth 9 run substantially along the entire lateral surface of thebody 2, with the exception of two diametrically oppositeflat regions 10a and 10b.Ribs 11 are provided atsaid regions 10a and 10b, run parallel to theaxis 2a of thebody 2, and contrast the rotation of thebody 2 inside the hole 7. - The push-fitting engagement means comprise two
flaps 12a and 12b protruding from the lateral surface of thebody 2 in two mutually diametrically opposite regions, preferably offset by 90° with respect to theregions 10a and 10b, about theaxis 2a of thebody 2. Theflaps 12a and 12b are flexible and are arranged atopenings 13a and 13b formed in the lateral surface of thebody 2, so that theflaps 12a and 12b, rigidly coupled to the remaining part of thebody 2 at their lower end, can flex, by virtue of their elasticity, towards theaxis 2a of thebody 2 when thebody 2 is inserted into the hole 7. - The
flaps 12a and 12b can also be provided withteeth 14 on their outer lateral surface. - Advantageously, it is possible to provide, on the outer surface of the
flaps 12a and 12b, astiffening rib 23 extending from the side of the lower end of the corresponding flap to the remaining part of thebody 2. - The
ribs 11 and theribs 23, except for the interruption constituted by theopenings 13a and 13b, extend to the upper end of thebody 2, that is to say, the end of thebody 2 connected to thecap 5 of the bulb-socket 6. - Furthermore, the device according to the invention comprises means for clamping the
electric power cord 4 which are provided so that the electric power cord is locked inside thebody 2 when saidbody 2 is inserted into the hole 7. - Advantageously, said means for clamping the
power cord 4 are constituted byteeth 15 formed on the surface of theflaps 12a and 12b that is directed towards theaxis 2a of thebody 2. Saidteeth 15 are shaped so as to contrast the extraction of theelectric power cord 4 in the opposite direction with respect to the bulb-socket 6. Theteeth 15 formed on theflaps 12a and 12b can be arranged mutually opposite or can be offset, so as to constitute a sort of labyrinth when theflaps 12a and 12b are mutually close. - Conveniently, in order to facilitate the insertion of the
body 2 into the hole 7, the end of thebody 2 that lies opposite to the cap, that is to say, the end to be inserted into the hole 7, has a taperingportion 16. - Mutually diametrically opposite flat portions can be provided on the side walls of the hole 7, said portions being adapted to couple to the
regions 10a and 10b of thebody 2 so as to effectively contrast the rotation of thebody 2 with respect to thebase 8 of the lamp after its insertion into the hole 7. - The
cap 5, as regards its part lying outside thebase 8, can be configured in a per se known manner and is not described in more detail for the sake of simplicity. - Assembly of the bulb-socket provided with the device according to the invention is as follows.
- The
power cord 4 is inserted beforehand through thepassage 3 formed in thebody 2. Thebody 2 is then inserted by pushing inside the hole 7. The insertion of thebody 2 into the hole 7 produces the push-fitting engagement of theteeth 9 and of theteeth 14 against the side walls of the hole 7, ensuring the push-fitting locking of thebody 2 inside the hole 7 and thus firmly coupling thecap 5 to thebase 8 of the lamp. - The insertion of the
body 2 inside the hole 7 also produces the flexing of theflaps 12a and 12b towards the axis of thebody 2 and thus also clamps theelectric power cord 4 inside thebody 2. - In practice it has been observed that the device according to the invention fully achieves the intended aim, since it allows to assemble the bulb-socket on the base of lamps in very short times, simply requiring push-fitting insertion, and simultaneously clamping the electric power cord, at the same time ensuring optimum electrical insulation.
- In practice, the materials employed, so long as they are compatible with the specific use, as well as the dimensions, may be any according to the requirements and the state of the art.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
Claims (12)
- A device for fixing bulb-sockets to the base of lamps, comprising a body (2) that has an elongated shape and is longitudinally crossed by a passage (3) for an electric power cord (4) and is connected with one of its ends to the cap (5) of the bulb socket (6) to be assembled, said body being provided on its lateral surface, with push-fit engagement means (9,12a,12b), means (15) for clamping said power cord being provided in said passage (3) characterized in that said body is made of insulating material, said push-fit engagement means being engageable inside a hole (7) formed in the lamp base (8), said push-fitting engagement means (9,12a,12b) comprising at least one flap (12a,12b) protruding from the lateral surface of said body (2) and flexing towards the axis (2a) thereof during the insertion of said body (2) into said hole (7) formed in the lamp base (8), said at least one flap being provided with teeth (14) on its external surface, adapted to engage the side walls of said hole (7) of said body (2).
- The device according to claim 1, characterized in that said body (2) is monolithic with said cap (5)) of the bulb-socket (6).
- The device according to the preceding claims, characterized in that said body (2) has a substantially cylindrical shape and in that said push-fitting engagement means comprise teeth (9) formed on the lateral surface of said body (2).
- The device according to claim 1, characterized in that said flap (12a,12b) is arranged at an opening (13a, 13b) formed in the lateral surface of said body, said opening (13a, 13b) leading into said passage (3).
- The device according to claim 1, characterized in that said means for clamping the power cord comprise teeth (15) formed on the surface of said flap (12a,12b) that is directed towards the axis (2a) of said body (2).
- The device according to claim 1, characterized in that said body (2) has, on its lateral surface, axial ribs (11) contrasting the rotation of said body (2) inside said hole (7) formed in the lamp base (8).
- The device according to claim 1, characterized in that said flap (12a,12b) has a stiffening rib (23) on its outer lateral surface.
- The device according to claim 7, characterized in that said flap (12a,12b) is connected to said body (2) by its lower end and in that the stiffening rib (23) of said flap extends from said lower end of the flap on the lateral surface of said body (2).
- The device according to claim 1, characterized in that said push-fitting engagement means comprises two diametrically opposite flaps (12a,12b) protruding from the lateral surface of said body (2).
- The device according to claim 9, characterized in that said body (2) has, on its lateral surface, two flat regions (10a,10b) that are mutually diametrically opposite and are angularly offset with respect to said flaps (12a,12b) about the axis (2a) of said body (2), said flat regions being arrangeable, when said body is inserted into said hole (7) formed in the lamp base (8), at two flat regions formed correspondingly on the side walls of said hole (7).
- The device according to claim 9, characterized in that said teeth formed on the internal surface of said flaps (12a,12b) are oppositely orientated.
- The device according to claim 9, characterized in that said teeth (15) formed on the internal surface of said flaps (12a,12b) are offset so as to form a labyrinth when said flaps (12a,12b) are moved towards the axis (2a) of said body (2).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI940534 IT233949Y1 (en) | 1994-07-20 | 1994-07-20 | DEVICE FOR FIXING LAMPHOLDERS TO THE BASE OF HIGHLY SIMPLE ASSEMBLY LAMPS |
ITMI940534U | 1994-07-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0693654A1 EP0693654A1 (en) | 1996-01-24 |
EP0693654B1 true EP0693654B1 (en) | 2002-10-09 |
Family
ID=11368301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19950111196 Expired - Lifetime EP0693654B1 (en) | 1994-07-20 | 1995-07-17 | Device for fixing bulb-sockets to the base of lamps |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0693654B1 (en) |
DE (1) | DE69528496T2 (en) |
ES (1) | ES2184775T3 (en) |
IT (1) | IT233949Y1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6808292B2 (en) | 2003-01-13 | 2004-10-26 | Bun Wong | Lamp holder |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4198384B1 (en) * | 2021-12-17 | 2024-06-26 | Ling Mei Te Lighting Co., Ltd | Lamp holder with fixed wire |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2556142B1 (en) * | 1983-12-06 | 1986-10-24 | Legrand Sa | SOCKET TO BE REPORTED ON ANY OBJECT, BOTTLE FOR EXAMPLE, HAVING AN APPROPRIATE OPENING FOR THIS PURPOSE |
SE456768B (en) * | 1987-04-06 | 1988-10-31 | Artilux Ab | DEVICE AT A LAMP TALLER |
DE8912234U1 (en) * | 1989-10-14 | 1989-11-30 | Brillantleuchten AG, 2742 Gnarrenburg | Connecting device for pipe sections to be connected to one another, in particular a standpipe of a floor lamp |
-
1994
- 1994-07-20 IT ITMI940534 patent/IT233949Y1/en active IP Right Grant
-
1995
- 1995-07-17 EP EP19950111196 patent/EP0693654B1/en not_active Expired - Lifetime
- 1995-07-17 ES ES95111196T patent/ES2184775T3/en not_active Expired - Lifetime
- 1995-07-17 DE DE1995628496 patent/DE69528496T2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6808292B2 (en) | 2003-01-13 | 2004-10-26 | Bun Wong | Lamp holder |
Also Published As
Publication number | Publication date |
---|---|
ITMI940534U1 (en) | 1996-01-20 |
ES2184775T3 (en) | 2003-04-16 |
DE69528496D1 (en) | 2002-11-14 |
DE69528496T2 (en) | 2003-06-26 |
ITMI940534V0 (en) | 1994-07-20 |
IT233949Y1 (en) | 2000-02-16 |
EP0693654A1 (en) | 1996-01-24 |
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