GB2036463A - A Holder for a Baseless Lamp - Google Patents
A Holder for a Baseless Lamp Download PDFInfo
- Publication number
- GB2036463A GB2036463A GB7934809A GB7934809A GB2036463A GB 2036463 A GB2036463 A GB 2036463A GB 7934809 A GB7934809 A GB 7934809A GB 7934809 A GB7934809 A GB 7934809A GB 2036463 A GB2036463 A GB 2036463A
- Authority
- GB
- United Kingdom
- Prior art keywords
- engagement
- baseless lamp
- board
- hollow
- holder
- 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.)
- Granted
Links
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000000750 progressive effect Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Classifications
-
- 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
- H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
- H01R33/09—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for baseless lamp bulb
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/301—Assembling printed circuits with electric components, e.g. with resistor by means of a mounting structure
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/325—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor
Landscapes
- Connecting Device With Holders (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
A hollow holder for fitting a baseless lamp to a board (22) comprises a hollow body (10) into which the baseless lamp is partly inserted, contacts provided on the hollow body to be electrically connected to the lead lines of the inserted baseless lamp, and an annular engagement flange (12) axially spaced from a pair of peripherally protruding engagement attachments (13) to clamp the board (22) thereby fixing the hollow body to the board (22), an inclined plane (18) being formed on an end face of each of the respective paired engagement attachments (13) and a knob (17) being defined by the inclined plane (18) to project toward the annular engagement flange (12) and be plastically deformed by its engagement with the board (22) when the body 10 is inserted in hole 22b in the board 22 and rotated therein. <IMAGE>
Description
SPECIFICATION
A Holder for a Baseless Lamp
This invention relates to a socket device or hollow holder for fitting a baseless lamp to a substrate such as a printed wiring board.
Generally, this type of holder for a baseless lamp is fitted to a printed wiring board by first fixedly setting a baseless lamp in place and then electrically connecting the lead line of the baseless lamp to the print wire of the board. The prior art hollow cylindrical lampholder is provided with an engagement flange projectively formed on the peripheral wall of the hollow cylindrical lampholder and a pair of engagement attachments protrusively formed on the peripheral wall of the hollow cylindrical lampholder to face each other. The printed wiring board is provided with an opening, on the periphery of which a pair of notches shaped complementarily to the paired engagement attachments are formed. The hollow cylindrical lampholder is partly inserted into the opening, until the paired engagement attachments pass through the corresponding notches.At this point, the hollow cylindrical lampholder is rotated through an angle of 900 to clamp the printed wiring board between the engagement flange and engagement attachment, followed by the fixing of the hollow cylindrical lampholder to the printed wiring board.
With the prior art hollow cylindrical holder for a baseless lamp, a space between the engagement flange and the paired engagement attachments has to be defined with extremely high precision with respect to the thickness of the printed wiring board. If the space is too narrow, a great force will be required to rotate the hollow cylindrical lampholder in fixing it to the substrate.
Conversely where, the space is too broad, the hollow cylindrical lampholder will fail to be securely fixed to the substrate. In such case, the holder and thus baseless lamp will be rendered shaky and probably come off from the board during application.
It is accordingly the object of this invention to provide a hollow cylindrical holder for a baseless lamp, which can be fitted to a board or substrate without difficulties, even if a space between the engagement flange and the engagement attachments is not defined with high precision, and, once fitted to the substrate, is not likely to come off therefrom unnecessarily.
According to an aspect of this invention, there is provided a hollow cylindrical holder for fitting a baseless lamp to a substrate, said hollow cylindrical lampholder comprising a hollow cylindrical body into which the baseless lamp is partly inserted; contacts provided on the hollow cylindrical lampholder to be electrically connected to the lead lines of the inserted baseless lamp; and an annular engagement flange and a pair of engagement attachments which are protrusively formed on the periphery of the hollow cylindrical lampholder in a state spaced from each other axially of the hollow cylindrical lampholder, and, where the hollow cylindrical lampholder is rotated in a given direction through the prescribed angle, are designed to clamp the substrate therebetween, thereby fixing the hollow cylindrical lampholder to the substrate, the improvement in which an inclined plane isvformed on that end face of the respective paired engagement attachments which is set opposite to the direction in which the hollow cylindrical lampholder is rotated; and said inclined plane defines a knob which projects toward the annular engagement flange and is plastically deformed upon engagement with the substrate.
This invention can be more fully understood from the following detailed description when taken in conjection with the accompanying drawings, in which:
Fig. 1 is a plan view of a hollow cylindrical holder for a baseless lamp embodying this invention;
Fig. 2 is a sectional view on line 2-2 of the hollow cylindrical lampholder of Fig. 1;
Figs. 3 and 4 are side views of said hollow cylindrical lampholder as taken in the different directions;
Fig. 5 is an oblique view of the protruding section of the engagement attachment of the hollow cylindrical lampholder fitted to the substrate;;
Figs. 6A-6B, 7A-7B and 8A-8B respectively show the progressive plastic deformation of the knob defined by the inclined plane of the engagement attachment and the
resultant sequential changes in the shape of a groove formed in the surface of the board by said knob; and
Fig. 9 is a side view of a modified engagement attachment.
There will be described by reference to the accompanying drawings a hollow cylindrical
holder for a baseless lamp embodying this
invention.
Referring to Figs. 1 to 4, reference numeral 10
denotes a cylindrical lampholder body which is
prepared from electrically insulating synthetic
resin and is opened at one end. An axially
extending hole 11 is provided at the central part
of said hollow cylindrical body 10. An annular
engagement flange 12 is projectively formed
substantially at the axial middle portion of the
peripheral wall of the hollow cylindrical body 10
in concentric relationship.A pair of engagement
attachments 1 3 are projectively formed on the
peripheral wall of the hollow cylindrical body 10
near the aforesaid opening in a state spaced from
each other at an angle of about 1 800. As seen
from Fig. 4, each engagement attachment 1 3 comprises a vertical portion 14, extending from
the annular engagement flange 12 toward the top
opening 11 a horizontal portion 1 5 extending
from the vertical portion 14 along the periphery of
the holder 10 substantially in parallel with the
annular engagement flange 12, and a knob 1 6
formed at the outer extended end of the
horizontal portion 1 5 to protrude toward the annular engagement flange 1 2. The knob 1 6 has a vertical plane 17 on one side and an inclined plane 1 8 on the other side, thereby defining a sharp edge. The vertical portion 14, horizontal portion 1 5 and knob 16 of each of the paired engagement attachments 13 protrude integrally with the peripheral wail of the hollow cylindrical body 10. The paired engagement attachments 1 3 and annular engagement flange 12 are generally formed integrally with the hollow cylindrical body
10. The knob 1 6 is prepared from synthetic resin and has a sharp edge as described above.Where, therefore, a stress is applied to said sharp edge in the opposite direction to the inclined portion 18, then the sharp edge is plastically deformed to provide a protuberance outward extending across the thickness of the knob 1 6, that is, radially of the hollow cylindrical body 1 0.
A pair of mutually facing vertical grooves 1 Oa (Fig. 3) are cut out in the upper portion of the peripheral wall of the hollow cylindrical body 10.
The groove 1 Oa extends from the upper peripheral edge of the axial hole 11 of the hollow cylindrical lampholder 10 to the annular engagement flange
12. A pair of power supply contacts 1 9 extend through the paired vertical grooves 1 Oa to have the outer ends of said contacts 19 set on the upper surface of the annular engagement flange
12. The base end of each power supply contact
1 9 is disposed at the lower part of the axial hole
11 of the hollow cylindrical body 10 to be clamped between a support protuberance projectively formed on the lower inner wall of the hollow cylindrical body 10 and the inner wall of the axial hole 11. A pair of bulb side contacts 20 are integrally formed on both sides of each of said power supply contacts.The paired bulb side contacts 20 extend along the inner wall of the axial hole 11 of the hollow cylindrical body 10 up to the proximity of the opening to face each other.
There will now be described the operation of fitting a baseless lamp to a printed wiring board by means of a hollow cylindrical lampholder constructed as described above in accordance with this invention.
As shown in Fig. 3, that side of a baseless lamp 21 from which lead lines are extended is partly inserted into the axial hole 11 of the hollow cylindrical body 10 to electrically connect lead lines (not shown) to the bulb side contacts 20.
Thereafter, the baseless lamp 21 is inserted into the fitting hole 22b of a synthetic resin insulation substrate or printed wiring board 22, on one side 22a of which a print wire is set, until the baseless lamp 21 is stopped by the annular engagement flange 12. The fitting hole 22b has a diameter slightly larger than the outer diameter of the hollow cylindrical body 10. A pair of slits are formed in the inner wall of said fitting hole 22b at two mutually facing points to allow for the passage of the paired engagement attachments 1 3. The printed wiring board 22 has a thickness slightly broader than a space defined between the outer end of the knob 1 6 and annular engagement flange 12.The hollow cylindrical body 10 into which a baseless lamp 21 had been inserted is rotated through an angle of substantially 900 in the direction of an arrow indicated in Fig. 4 to bring the knob 1 6 on the surface of the printed wiring board 22. As a result, said printed wiring board 22 is clamped between the knob 1 6 and engagement flange 12, thereby firmly fixing the hollow cylindrical body 10 to the board 22. Since the hollow cylindrical body 10 is rotated at this time through an angle of substantially 900, the knob 16 is plastically deformed by the printed wiring board 22, thereby ensuring the tight fitting of the hollow cylindrical body 10 to said printed wiring board 22.When the hollow cylindrical body 10 is rotated, the edge of the vertical plane 1 7 of the knob 1 6 slightly touches the upper part of the side wall of the slit portion of the fitting hole 22b into which said knob 16 is inserted. As a result, a groove 22c having a cross section complementary to the shape of the edge of the vertical plane 1 7 of the knob 16 is formed in the printed wiring board 22.
The edge portion itself of the vertical plane 17 of the knob 1 6 is plastically deformed to increase in the width as shown in Fig. 5. While the hollow cylindrical body 10 is rotated, the knob 16 is plastically deformed to progressively increase in width, while the groove 22c is formed with such depth as progressively decreases toward the forward end. The progressive plastic deformation of the knob 1 6 and the successively changing shape of the groove 22c are illustrated in Figs.
6A, 6B; 7A, 78; and 8A, 8B. After the hollow cylindrical lampholder 10 is rotated through an angle of 900, the groove 22c formed in the surface of the board 22 has its cross section changed due to the plastic deformation of the knob 1 6. As a result, the hollow cylindrical body 10 is prevented by the side wall of the groove 22c from being rotated in the opposite direction to that indicated by the arrow of Fig. 4, namely, that in which the hollow cylindrical body 10 was initially rotated. Therefore, the hollow cylindrical body 10 is firmly fixed to the board 22.When the hollow cylindrical body 10 is fitted to the printed wiring board 22, said board 22 is already so arranged by the known practice as to cause the output side contacts 1 9 of the hollow cylindrical body 10 to be electrically connected to the prescribed terminals of the print wire of the board 22.
With a hollow cylindrical holder for a baseless lamp embodying this invention a knob is formed, as described above, on each of a pair of engagement attachments 13 to extend toward an annular engagement flange 12. The plastic deformation of the knob firmly supports the printed wiring board with the aid of the engagement flange 12.
With the hollow cylindrical lampholder of the foregoing embodiment, the knob 1 6 of the engagement attachment 1 3 was defined by the vertical plane 17 and the inclined plane 18.
However, both side walls of said knob 16 may be formed of inclined planes as shown in Fig. 9.
Further, the inclined plane need not be restricted to the indicated form having a flat surface, but may be the type having an inward or outward curved plane.
Claims (8)
1. In a hollow holder for fitting a baseless lamp with lead lines extended outwardly to a board comprising a hollow body into which the baseless lamp is partly inserted, contacts provided on the hollow body to be electrically connected to the lead lines of the inserted baseless lamp, and an engagement flange and a pair of engagement attachments which are protrusively formed on the periphery of the hollow body in a state spaced from each other axially of said hollow body, to clamp the board therebetween thereby fixing the hollow body to the board, where the hollow body is rotated in a given direction through the prescribed angle, the improvement in which an inclined plane is formed on that end face of the respective paired engagement attachments which is set opposite to the direction in which the hollow body is rotated, and said inclined plane defines a knob which projects toward the engagement flange from the engagement attachment and is plastically deformed upon engagement with the board.
2. The hollow holder for a baseless lamp according to claim 1, in which said hollow body is a cylindrical body, and the engagement flange has an annular form and is provided in the axially central part of the cylindrical body concentrically thereof to project outward.
3. The hollow holder for a baseless lamp according to claim 2, wherein the engagement attachments are provided in the space from each other through an angle of substantially 1800.
4. The hollow holder for a baseless lamp according to claim 3, wherein a space between the knob formed on each of the paired engagement attachments and the engagement flange is broader than the thickness of the board.
5. The hollow holder for a baseless lamp according to claim 4, wherein the contacts comprise bulb side contacts electrically connected to the lead lines of the baseless lamp and output side contacts electrically connected to the board.
6. The hollow holder for a baseless lamp according to claim 4, wherein the cylindrical body, engagement flange and paired engagement attachments are integrally prepared from synthetic resin.
7. The hollow holder for a baseless lamp according to claim 6, wherein the knob has one side defined by said inclined plane and the other side also by another inclined plane.
8. A holder for a baseless lamp, substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12467478A JPS5553084A (en) | 1978-10-12 | 1978-10-12 | Socket for baseless lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2036463A true GB2036463A (en) | 1980-06-25 |
| GB2036463B GB2036463B (en) | 1983-01-26 |
Family
ID=14891247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7934809A Expired GB2036463B (en) | 1978-10-12 | 1979-10-08 | Holder for baseless lamp |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5553084A (en) |
| CA (1) | CA1122183A (en) |
| DE (1) | DE2941129A1 (en) |
| GB (1) | GB2036463B (en) |
| IT (1) | IT1164727B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619180Y2 (en) * | 1987-05-12 | 1994-05-18 | スタンレー電気株式会社 | Socket holder |
| WO2003057970A1 (en) | 2002-01-11 | 2003-07-17 | Lg Electronics Inc. | Apparatus for supplying detergent in washer |
| JP4930437B2 (en) * | 2008-04-03 | 2012-05-16 | 住友電装株式会社 | connector |
-
1978
- 1978-10-12 JP JP12467478A patent/JPS5553084A/en active Pending
-
1979
- 1979-10-08 GB GB7934809A patent/GB2036463B/en not_active Expired
- 1979-10-10 IT IT50510/79A patent/IT1164727B/en active
- 1979-10-10 DE DE19792941129 patent/DE2941129A1/en not_active Ceased
- 1979-10-12 CA CA000337526A patent/CA1122183A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5553084A (en) | 1980-04-18 |
| DE2941129A1 (en) | 1980-04-17 |
| GB2036463B (en) | 1983-01-26 |
| IT1164727B (en) | 1987-04-15 |
| CA1122183A (en) | 1982-04-20 |
| IT7950510A0 (en) | 1979-10-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 746 | Register noted 'licences of right' (sect. 46/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19921008 |