GB2204630A - Fastening stud digital display apparatus - Google Patents
Fastening stud digital display apparatus Download PDFInfo
- Publication number
- GB2204630A GB2204630A GB08711079A GB8711079A GB2204630A GB 2204630 A GB2204630 A GB 2204630A GB 08711079 A GB08711079 A GB 08711079A GB 8711079 A GB8711079 A GB 8711079A GB 2204630 A GB2204630 A GB 2204630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stud
- baseboard
- flap
- fastening
- flange
- 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.)
- Pending
Links
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 239000002991 molded plastic Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/06—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of clamps or clips
- F16B5/0685—Joining sheets or plates to strips or bars
Abstract
Stud (10) for resiliently fastening a first member (41) to a second member (35) has a head portion (12) provided with a fastening formation (14) and connected via an elongate body portion (15) to a tail portion (24) in the form of a leaf spring reverse folded along the body portion (15) towards the head portion (12), the tail portion (24) terminating in a transversely projecting flange (28). In use, the head portion (12) projects through an opening in the second member (35) and is connected via said fastening formation (14) to the first member (41). The flange (28) butts against and locates behind the surface of the second member (35) remote from the first member (41). As particularly described, member (41) is a flap pivotable to selectively cover or expose a segment of a seven- segment display of a digital display apparatus and member (35) is a base board. The fastening formation (14) is in the form of a transverse aperture to receive a spindle (37) of the flap (41) body portion (15) has a flange (18) - flanges (18, 28) act as light baffles and a flange (22) acts to black light so that in a back-lit version stray light does not appear at front of display. <IMAGE>
Description
IMPROVED FASTENING STUD
The present invention relates to a fastening stud for pivotally fastening a first member to a second member through an opening formed in the second member.
BACKGROUND TO THE INVENTION
Often the fastening together of two members is time consuming, and in assemblies in which a multiplicity of fasteners are used and each fastener is an assembly of several components, assembly time is costly. For example, our patent specification No GB--2139391 described and claimed a digital display apparatus comprising a substantially planar baseboard having one or more seven element displays marked on a front face thereof. A flap or shield for each element of the or each display was pivotal from a first position in which the associated element was exposed to a second position in which the associated element was covered.Selective pivoting movement of the indicated flaps enabled the elements to form and display any required digit with each flap being pivotable manually from a first position in which one face of the flap was against the front face of the baseboard to a second position in which the other face of the flap was against the front face of the baseboard.The flaps were attached to the baseboard by mechanisms each comprising: firstly a stud inserted into an aperture in the baseboard, the stud having a transverse aperture therethrough extending substantially parallel to the plane of the baseboard adjacent the front face thereof; secondly an edge portion of the flap, being a portion of the material of the flap lying between one edge thereof and a slot formed in the material of the flap adjacent that edge; thirdly means for retaining said stud within the aperture in the baseboard; and fourthly spring means on the stud for retaining its associated flap in the first or second position. The stud employed was a plastics member having a transversely extending aperture and a longitudinal slot extending from the aperture to the end of the stud which was provided with an outwardly extending flange.The stud was mounted in the slot, after which the stud was passed through an aperture in the baseboard, a coil spring was placed thereon and the stud and spring were retained by a cotter that engaged the stud flange. The combination of plastics studs with metal springs and cotters was robust and gave a strong spring action holding the flaps against the baseboard in service in exposed conditions as on the forecourt of a petrol station.
Our patent specification No GB-n-2164695 described a onepiece plastics fastening stud for resiliently fastening a first member to a second member through an opening formed in the second member. The stud comprised a tubular body member having at least one pair of resilient wings integral with and diverging away from the body member and having a fastening formation on its head portion remote from the wings. Apart from the one-piece construction, this stud dispensed with the need for a separate metal coil spring and cotter.With this arrangement, in use, the free end of each wing resiliently engaged one suface of the second member on opposite sides of the opening and the first member was snap-fitted into a fastening formation adjacent the opposite surface of the second member, said formation taking the form of a pair of jaws. n seven-segment manually operated digital display apparatus could be made using the studs described, but for some applications the studs were insufficiently robust and were prone to fail in service at the junction between the body of the stud and the wings.
The flap was insufficiently retained between the jaws and could become disengaged. Furthermore, the stud provided an insufficient light seal for back-lit versions of the sisplay, and stray light formed a halo effect around each stud.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a fastening stud that when used to hold the flaps to the baseboard of a manually operated seven-segment display combines robustness and strong spring action with a one-piece construction.
It is a further object of the invention to provide a fastening stud that can resiliently retain a flap in a back-lit digital display without stray light appearing at the front face of the display.
Broadly stated, the invention provides a fastening stud for resiliently fastening a first member to a second member through an opening formed in the second member, said stud comprising a head portion provided with a fastening formation and connected via an elongate body portion to a tail portion in the form of a leaf spring reverse folded along the body portion towards the head portion, the tail portion terminating in a transversely projecting flange, the arrangement being such that, in use, the head portion projects through the opening in the second member and is connected via said fastening formation to the first member, and the flange butts against and locates behind the surface of the second member remote from the first member.
Ndvantageously an end of the body portion remote from the head carries an out-turned flange that in use butts against the rear surface of the second member to limit the distance that the head can project through the second member. The projecting flange on the tail portion and the out-turned flange act also as light baffles preventing passage of stray light about most of the periplery of the stud. Infill netween them is provided at the end of the body portion remote from the head which carries an in-turned flange beneath the out-turned flange and extending laterally (i.e.
parallel to the line of action of the fastening formation) beyond the periphery of the head, the in-turned flange blocking passage of light between the projecting flange of the tail portion and the out-turned flange.
In a second aspect the invention provides a digital display aparatus comprising a substantially planar baseboard having one or more seven segment displays marked on a front face thereof and a flap or shield for each element of the display which is pivotal from a first position in which the associated element is exposed to a second position in which the associated element is covered, selective pivoting movement of the indcated flaps enabling the elements to form and display any required digit with each flap being pivotable manually about one edge from a first position in which one face of the flap is against one face of the baseboard and a second position in which the other face of the flap is against the front face of the baseboard, and the flaps are attached to the baseboard by mechanisms each comprising: firstly an edge portion of the flap, being a portion of the material of the flap lying between one edge thereof and a slot formed in the material of the flap adjacent that edge; and secondly a fastening stud inserted into an aperture in the baseboard and comprising a head portion provided with a fastening formation including a transverse aperture directed substantially parallel to the plane of the baseboard, the head portion projecting through the front face of the baseboard and being connected via said edge portion to said flap, an elongate body portion extending through the aperture and a tail portion in the form of a leaf spring reverse folded along the body portion towards the head portion, the tail portion terminating at a transversely projecting flange that butts against and locates behind the back face of the baseboard.
BRIEF DESCRIPTION OF THE DRAWINGS
An embodiment of the invention will now be described, by way of example only, with reference to the accomapnying drawings, in which:
Figures 1, 2, 2a and 3 are respectively a front elevation, side elevation, top plan and rear elevation of a stud according to the invention;
Figure 4 is a scrap sectional view of a baseboard according to the invention showing the stud of Figures 1-3 in an aperture of the baseboard, and Figure 5 is a view like
Figure 4 but showing a flap being offered up to the stud; and
Figures 6 to s are scrap sectional views of the flap and baseboard showing a first stable flap position, an intermediate flap position and the second stable flap position.
DEX TILED DESCRIPTION OF PREFERRED EMBODIMENT
In the drawings, a moulded plastics stud generally indicated by the reference numeral 10 comprises a head portion 12 that is circular in plan and that when viewed from the side is hooked over to define a fastening formation in the form of a transverse aperture 14 extending from one side of the stud 10 to the other. fin elongate body or stem 15 extends from the head portion 12, has the form of a minor segment of a cylinder when viewed in profile and internally is bounded by a planar face 16. The outer surface of the body 15 is formed towards an end thereof remote from the head portion 12 with an out-turned flange 18 supported by a buttress 20 and an in-turned flange 22 is provided below the flange 18 to block out stray light when the stud 10 is in use.The basal region of the body 15 is joined to an arcuate leaf spring 24 that curves back along the body 15 and terminates opposite inclined cam face 26 of the head portion 12 in an out-turned flange 28 and an upwardly projecting locating spigot 30 having a conical side wall 32 that in use of the stud provides a centering auction.
As best seen in Figure 2a the flanges 18,28 which in plan have the form of closely spaced segments of a circle extend beyond the periphery of the head portion 12 and act as light baffles. The flange 22 acts as an infill, blocking passage of light through the amall gap between the flanges 18,28, so that in a back-lit version of a display using the stud 10, detrimental stray light does not appear at the front of the display.
Figure 4 shows a stud 10 offered to a circular aperture in a baseboard 35 of a seven segment digital display apparatus as described in specification No GS-B-2139391. The head 12 protrudes through the aperture, and the stud 10 is retained axially by abutment of the flange 28 with the rear surface of the baseboard 35, the outer part cylindrical surface of the body 15 together with the wall 32 of the spigot 30 serving to centre the stud in the aperture. Axial pressure on the body 15 deforms the leaf spring portion 24 until the flange 18 butts against the rear face of baseboard 35, after which an integral spindle 37 adjacent one edge 39 of a moulded plastics flap 41 and spanning a slot 43 formed in the flap can be offered to cam surface 26 as in Figure 5 and snapped past it into bearing engagement with the aperture 14 as in Figure 6.Comparison of the axial positions of the head 12 in Figures 4 and 6 shows that after spindle 37 has snapped home in the aperture 14, the head 12 has not fully returned and tension in the leaf spring 24 urges the body 15 towards the rear face of the baseboard. Because the flap 41 fulcrums on the baseboard at the edge 39, the flap 41 is held against the front face of the baseboard 35 in one position as shown. The flap 41 may be lifted against the resistance of the leaf spring 24 as in Figure 7, the spindle 37 having been raised relative to the front face of the baseboard 37 and the stud 10 having been pulled through the aperture in the baseboard against the resistance of spring 24, after which movement of the flap 41 may continue until the second stable position of
Figure 8 is reached.
The stud 10 has the advantage that it is compatible with the flap 41 and baseboard 35 of Patent specification No GB B-2139391 but is a single moulded plastics component. The leaf spring 24 between body 15 and flange 28 can provide a powerful return force without the development of detramental stress concentrations and the stud 10 is therefore reliable and has a long service life.
Claims (9)
1. A fastening stud for resiliently fastening a first member to a second member through an opening formed in the second member, said stud comprising a head portion provided with a fastening formation and connected via an elongate body portion to a tail portion in the form of a leaf spring reverse folded along the body portion towards the head portion, the tail portion terminating in a transversely projecting flange, the arrangement being such that, in use, the head portion projects through the opening in the second member and is connected via said fastening formation to the first member, and the flange butts against and locates behind the surface of the second member remote from the first member.
2. The stud of claim 1, which is a one-piece moulding in plastics material.
3. The stud of claim 1 or 2, wherein the fastening formation of the head portion is in the form of a hook.
4. The stud of claim 3, wherein a mouth of the hook has an inclined cam face defining a lead-in for the hook.
5. The stud of any of claims 1-4, wherein an end of the body portion remote from the head carries an out-turned flange which in use butts against the rear surface of the second member to limit the distance that the head can project through the second member.
6. The stud of claim 5, wherein the end of the body portion remote from the head carries an in-turned flange located beneath the out-turned flange and extending laterally beyond the periphery of the head, the in-turned flange blocking passage of light between the projecting flange of the tail portion and the out-turned flange.
7. The stud of any of claims i-E, wherein the projecting flange at the tail portion carries an upstanding spigot for locating the stud centrally in the aperture of the eventual baseboard.
8. A fastening stud for resiliently fastening a first member to a second member substantially as hereinbefore described with reference to and as illustrated in Figures 1-3 of the accompanying drawings.
9. A digital display aparatus comprising a substantially planar baseboard having one or more seven segment displays marked on a front face thereof and a flap or shield for each element of the display which is pivotal from a first position in which the associated element is exposed to a second position in which it covers the associated element, selective pivoting movement of the indcated flaps enabling the elements to form and display any required digit with each flap being pivotable manually about one edge from a first position in which one face of the flap is against one face of the baseboard and a second position in which the other face of the flap is against the front face of the baseboard, and the flaps are attached to the baseboard by mechanisms each comprising: firstly an edge portion of the flap3 being a portion of the material of the flap lying between one edge thereof and a slot formed in the material of the flap adjacent that edge; and secondly a fastening stud inserted into an aperture in the baseboard and comprising a head portion provided with a fastening formation including a transverse aperture directed substantially parallel to the plane of the baseboard, the head projecting through the front face of the baseboard and being connected via said edge portion to said flap, an elongate body portion extending through the aperture and a tail portion in the form of a leaf spring reverse folded along the body portion towards the head portion, the tail portion terminating at a transversely projecting flange that butts against and locates behind the back face of the baseboard.
10 . R digital display apparatus constructed, arranged and adapted to operate substantially as hereinbefore described with reference to and as illustrated in the ,accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08711079A GB2204630A (en) | 1987-05-11 | 1987-05-11 | Fastening stud digital display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08711079A GB2204630A (en) | 1987-05-11 | 1987-05-11 | Fastening stud digital display apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8711079D0 GB8711079D0 (en) | 1987-06-17 |
| GB2204630A true GB2204630A (en) | 1988-11-16 |
Family
ID=10617127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08711079A Pending GB2204630A (en) | 1987-05-11 | 1987-05-11 | Fastening stud digital display apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2204630A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2211240A (en) * | 1987-10-15 | 1989-06-28 | David Jones Designs Limited | Apparatus for mounting sheet material clip |
| GB2244082A (en) * | 1990-05-18 | 1991-11-20 | On Tat Bakelite Electric Works | Assembling articles |
| GB2212853B (en) * | 1987-11-27 | 1991-12-11 | British Telecomm | Clip |
| GB2247912A (en) * | 1990-09-11 | 1992-03-18 | Decorative Stained Glass Limit | "Hinge" |
| GB2355105A (en) * | 1999-08-24 | 2001-04-11 | A C Edwards Ltd | A display with moveable flaps |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB744172A (en) * | 1953-01-21 | 1956-02-01 | Carr Fastener Co Ltd | Improvements in and relating to fastening devices |
| GB998155A (en) * | 1962-09-04 | 1965-07-14 | Carr Fastener Co Ltd | Fastener device for securing apertured members to one another |
| GB1030765A (en) * | 1963-12-09 | 1966-05-25 | Raymond A | Improvements in or relating to fasteners |
| GB1155472A (en) * | 1967-04-05 | 1969-06-18 | Carr Fastener Co Ltd | Clip for Attachment to an Apertured Support for Securing an Article thereto |
| GB1553989A (en) * | 1975-10-23 | 1979-10-17 | Connell J | Wheel trim and retaining means therefor |
| GB2160579A (en) * | 1984-06-19 | 1985-12-24 | Raymond A | Spring clip which can be fixed in a hole in a plate or panel |
-
1987
- 1987-05-11 GB GB08711079A patent/GB2204630A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB744172A (en) * | 1953-01-21 | 1956-02-01 | Carr Fastener Co Ltd | Improvements in and relating to fastening devices |
| GB998155A (en) * | 1962-09-04 | 1965-07-14 | Carr Fastener Co Ltd | Fastener device for securing apertured members to one another |
| GB1030765A (en) * | 1963-12-09 | 1966-05-25 | Raymond A | Improvements in or relating to fasteners |
| GB1155472A (en) * | 1967-04-05 | 1969-06-18 | Carr Fastener Co Ltd | Clip for Attachment to an Apertured Support for Securing an Article thereto |
| GB1553989A (en) * | 1975-10-23 | 1979-10-17 | Connell J | Wheel trim and retaining means therefor |
| GB2160579A (en) * | 1984-06-19 | 1985-12-24 | Raymond A | Spring clip which can be fixed in a hole in a plate or panel |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2211240A (en) * | 1987-10-15 | 1989-06-28 | David Jones Designs Limited | Apparatus for mounting sheet material clip |
| GB2212853B (en) * | 1987-11-27 | 1991-12-11 | British Telecomm | Clip |
| GB2244082A (en) * | 1990-05-18 | 1991-11-20 | On Tat Bakelite Electric Works | Assembling articles |
| GB2244082B (en) * | 1990-05-18 | 1993-04-21 | On Tat Bakelite Electric Works | Electric lamp |
| GB2247912A (en) * | 1990-09-11 | 1992-03-18 | Decorative Stained Glass Limit | "Hinge" |
| GB2355105A (en) * | 1999-08-24 | 2001-04-11 | A C Edwards Ltd | A display with moveable flaps |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8711079D0 (en) | 1987-06-17 |
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