Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
  • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
  • G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S10/00—Lighting devices or systems producing a varying lighting effect
  • F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
  • F21S10/023—Lighting devices or systems producing a varying lighting effect changing colors by selectively switching fixed light sources
• • 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
  • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
  • F21V17/14—Bayonet-type fastening
• • 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
  • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
  • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
  • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
• • 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
  • F21V5/00—Refractors for light sources
  • F21V5/04—Refractors for light sources of lens shape
  • F21V5/046—Refractors for light sources of lens shape the lens having a rotationally symmetrical shape about an axis for transmitting light in a direction mainly perpendicular to this axis, e.g. ring or annular lens with light source disposed inside the ring
• • 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
  • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
  • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
  • F21V19/0045—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding
• • 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
  • F21V5/00—Refractors for light sources
  • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
  • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2115/00—Light-generating elements of semiconductor light sources
  • F21Y2115/10—Light-emitting diodes [LED]

Definitions

• the present disclosure relates broadly to a diffuser for a tower signal module, to a lens for a tower signal module and to a tower signal module kit.
• Modular tower signal indicators are typically provided in the form of separate individual modules that are to be joined together in order to create a fully assembled tower signal indicator for use.
• Different types of modules may have different functions, for example light emission, sound emission, power input and power conversion etc.
• Tower signal indicators may be mounted on top of an industrial machine and extending vertically upwards e.g. to indicate operating statuses, error states etc. of the industrial machine. It is recognized that modular tower signal indicators are assembled in various environments, for example in an industrial environment, in a production area of equipment manufacturers etc. These environments may have various surrounding conditions, for example being indoors, being outdoors, under different kinds of lighting etc. Therefore, the joining mechanism of the various modules is significant in ensuring that the assembly process is favourable, i.e. easy, fast, intuitive and robust. For example, modules may be added to an already-extended tower signal indicator, the addition being at the top/peak of the tower signal indicator.
• a diffuser for a tower signal module capable of cooperating with a lens
• the diffuser comprises a diffuser housing having a first end and a second end, the first end being disposed opposite the second end; the first end comprising at least one alignment part; the second end comprising at least one positioning part; a docking section disposed in the diffuser housing for receiving a circuitry component; a diffuser stop member capable of cooperating with at least one lens stop member to provide frictional engagement between the diffuser and the lens; wherein the at least one alignment part and the at least one positioning part are complementary to each other and the at least one alignment part is capable of being matingly engaged to the at least one positioning part of an adjacent corresponding diffuser; and further wherein the diffuser is capable of rotation with respect to the lens upon application of a force to overcome the frictional engagement between the diffuser and the lens.
• the diffuser stop member may comprise a fixing connector to secure the diffuser to the lens to provide the frictional engagement.
• the fixing connector may comprise a flange and a fitting member, wherein the fitting member comprises a protruding part, the flange being disposed at a distance from the protruding part, and the flange and the protruding part being capable of sandwiching a portion of the at least one lens stop member therebetween.
• the fitting member may comprise a nipple extending from the protruding part of the fitting member for contacting a first interior surface of the lens, the nipple being capable of producing a sound upon rotation of the diffuser with respect to the lens.
• the fitting member may be pivotable about a center axis of the diffuser such that the fitting member is arranged to be biased against another portion of the at least one lens stop member.
• the diffuser may further comprise a centering member to engage with a centering inner / interior surface of the lens to center the diffuser with respect to the lens.
• the first end of the diffuser housing may have a different dimension to the second end of the diffuser housing, and the first end being capable of being fitted with the second end of an adjacent corresponding diffuser.
• the at least one alignment part may comprise a first rib disposed on a periphery of the diffuser housing.
• the at least one positioning part may comprise an engagement surface for receiving the at least one alignment part.
• a surface of the diffuser housing may comprise light diffusing features.
• a lens for a tower signal module capable of cooperating with a diffuser
• the lens comprises a lens housing having a first opening and a second opening, the first opening being disposed opposite the second opening; at least one first locking part proximal the first opening; at least one second locking part proximal the second opening; a lens stop member capable of cooperating with at least one diffuser stop member to provide frictional engagement between the diffuser and the lens; wherein the at least one first locking part and the at least one second locking part are complementary to each other and the at least one first locking part is capable of being matingly engaged to the at least one second locking part of an adjacent corresponding lens; and further wherein the lens is capable of rotation with respect to the diffuser upon application of a force to overcome the frictional engagement between the diffuser and the lens.
• the lens stop member may comprise a centering interior surface to frictionally engage with the at least one diffuser stop member.
• the lens stop member may further comprise an undulating surface to frictionally engage with a protruding diffuser part.
• the undulating surface may be arranged for contacting the protruding diffuser part to produce a sound upon rotation of the diffuser with respect to the lens.
• the first opening of the lens housing may have a different dimension to the second opening of the lens housing.
• a surface of the lens housing may comprise light diffusing features.
• a tower signal module kit comprising a diffuser of the first aspect; and a lens of the above aspect.
• the diffuser may be provided in frictional engagement with the lens.
• FIG. 1 is an exploded perspective view of a tower signal module in an exemplary embodiment.
• FIG. 2A is a schematic drawing of a circuit board in an exemplary embodiment prior to attachment to a diffuser.
• FIG. 2B is a top view of the circuit board in the exemplary embodiment.
• FIG. 2C is a bottom view of the circuit board in the exemplary embodiment.
• FIG. 2D is a side view of the circuit board when viewed in the direction X of FIG. 2A.
• FIG. 2E is a side view of the circuit board when viewed in the direction Y of FIG. 2A.
• FIG. 3A is a schematic drawing of a diffuser in an exemplary embodiment prior to attachment to a circuit board and prior to attachment to a lens.
• FIG. 3B is a top view of the diffuser in the exemplary embodiment.
• FIG. 3C is a bottom view of the diffuser in the exemplary embodiment.
• FIG. 3D is a side view of the diffuser in the exemplary embodiment.
• FIG. 3E is another side view of the diffuser in the exemplary embodiment.
• FIG. 4A is a schematic drawing of a lens in an exemplary embodiment prior to attachment to a diffuser.
• FIG. 4B is a top view of the lens in the exemplary embodiment.
• FIG. 4C is another schematic drawing of the lens in the exemplary embodiment.
• FIG. 4D is a bottom view of the lens in the exemplary embodiment.
• FIG. 4E is a front view of the lens in the exemplary embodiment.
• FIG. 4F is a side view of the lens in the exemplary embodiment.
• FIG. 5A is a perspective view of a tower signal module in an exemplary embodiment.
• FIG. 5B is a bottom view of the tower signal module in the exemplary embodiment.
• FIG. 5C is a top view of the tower signal module in the exemplary embodiment.
• FIG. 5D is a side view of the tower signal module in the exemplary embodiment.
• FIG. 5E is a cross-sectional view of the tower signal module along the line AA of FIG. 5D.
• FIGS. 6A to 6E are schematic drawings for illustrating the steps of assembling two tower signal modules in an exemplary embodiment.
• FIG. 6A(i) is a perspective view of the two tower signal modules in the exemplary embodiment.
• FIG. 6A(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6A(iii).
• FIG. 6A(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6A(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6A(iii).
• FIG. 6A(v) is the right view of diffusers of the two tower signal modules to illustrate the respective positions of the diffusers disposed inside/within the respective tower signal modules shown in FIG. 6A(i).
• FIG. 6B(i) is a perspective view of the two tower signal modules in a stack in the exemplary embodiment.
• FIG. 6B(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6B(iii).
• FIG. 6B(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6B(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6B(iii).
• FIG. 6B(v) is the right view of the diffusers of the two tower signal modules to illustrate the respective positions of the diffusers.
• FIG. 6C(i) is a perspective view of the two tower signal modules in the exemplary embodiment.
• FIG. 6C(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6C(iii).
• FIG. 6C(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6C(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6C(iii).
• FIG. 6C(v) is a perspective view of the diffusers of the two tower signal modules to illustrate the respective positions of the diffusers.
• FIG 6C(vi) is a top view of the tower signal module 600.
• FIG. 6D(i) is a perspective view of the two tower signal modules in the exemplary embodiment.
• FIG. 6D(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6D(iii).
• FIG. 6D(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6D(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6D(iii).
• FIG. 6D(v) is a perspective view of the diffusers of the two tower signal modules to illustrate the respective positions of the diffusers.
• FIG 6D(vi) is a bottom cross-sectional view of the two tower signal modules along the line BB of FIG. 6D(iii).
• FIG. 6E(i) is a perspective view of the two tower signal modules in the exemplary embodiment.
• FIG. 6E(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6E(iii).
• FIG. 6E(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6E(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6E(iii).
• FIG. 6E(v) is a perspective view of the diffusers of the two tower signal modules to illustrate the respective positions of the diffusers.
• FIG 6E(vi) is a bottom cross-sectional view of the two tower signal modules along the line BB of FIG. 6E(iii).
• FIG. 7A is a schematic drawing to illustrate insertion/attachment of a circuit board to a diffuser in an exemplary embodiment.
• FIG. 7B is a schematic drawing showing a comparative example to illustrate that a circuit board is disallowed from being inserted into / attached to a diffuser.
• FIG. 8 is a schematic drawing illustrating part of an exploded cross-sectional view of two tower signal modules assembled in an exemplary embodiment.
• FIG. 1 is an exploded perspective view of a tower signal module in an exemplary embodiment.
• the tower signal module 100 comprises a diffuser 102, a circuitry component 104 and a lens 106.
• the circuitry component 104 is, for example, a circuit board 104.
• the diffuser 102 is adapted to receive the circuit board 104.
• the diffuser 102 is capable of cooperating with the lens 106.
• the diffuser 102 is further adapted to engage with the lens 106 such that there is a freedom of rotation between the diffuser 102 and the lens 106.
• the diffuser 102 may rotate about an axis A independently of the lens 106 if an external force is applied to effect the rotation.
• Axis A is an axis that is parallel and coincident to a center axis passing through the diffuser 102 and the lens 106.
• the circuit board 104 is in the form of, but is not limited to, a printed circuit board assembly.
• the lens 106 may comprise a translucent or transparent external surface for providing light emission. In other exemplary embodiments, the lens 106 may be opaque. The lens 106 is provided to engage and to hold the diffuser 102.
• the diffuser 102 and the lens 106 may be formed of, but not limited to, a plastic material.
• the diffuser 102 and the lens 106 may be formed using, but is not limited to, plastic molding.
• the tower signal module 100 may be joined or connected to another tower signal module 100 at its top part and/or at its bottom part.
• FIG. 2A is a schematic drawing of a circuit board in an exemplary embodiment prior to attachment to a diffuser.
• FIG. 2B is a top view of the circuit board in the exemplary embodiment.
• FIG. 2C is a bottom view of the circuit board in the exemplary embodiment.
• FIG. 2D is a side view of the circuit board when viewed in the direction X of FIG. 2A.
• FIG. 2E is a side view of the circuit board when viewed in the direction Y of FIG. 2A.
• the circuit board 200 is substantially similar to the circuit board 104 of FIG. 1.
• the circuit board 200 is configured to be connected to a diffuser (not shown).
• the circuit board 200 comprises a connecting portion e.g. 202 adapted for fitting or connecting to a docking connector (not shown) of the diffuser.
• the connecting portion e.g. 202 is of a complementary shape and size to the docking connector of the diffuser.
• the connecting portion e.g. 202 may be a slot or aperture.
• the circuit board 200 may be snap-fitted to join / connect to the diffuser.
• the circuit board 200 further comprises a first electrical connector 204 at one end and a second electrical connector 206 at an opposing end.
• the first electrical connector 204 comprises a projection part or a so-called male connector and the second electrical connector 206 comprises a female mating recess.
• the projection part of one circuit board is configured to be received in the female mating recess of an adjacent corresponding circuit board to allow electrical contact between adjacent circuit boards.
• FIG. 3A is a schematic drawing of a diffuser in an exemplary embodiment prior to attachment to a circuit board and prior to attachment to a lens.
• FIG. 3B is a top view of the diffuser in the exemplary embodiment.
• FIG. 3C is a bottom view of the diffuser in the exemplary embodiment.
• FIG. 3D is a side view of the diffuser in the exemplary embodiment.
• FIG. 3E is another side view of the diffuser in the exemplary embodiment.
• the diffuser 300 is substantially similar to the diffuser 102 as described in FIG. 1.
• the diffuser 300 is capable of cooperating with the lens (not shown).
• the diffuser 300 comprises a diffuser housing such as a substantially cylindrical body 302 and a docking section 308 for receiving a circuit board (compare circuit board 104 in FIG. 1 , 200 in FIGS. 2A to 2E).
• the docking section 308 is provided with a through-hole slot or recess 310 within a substrate disposed within the body 302.
• the diffuser housing comprises a first end 304 and a second end 306, the first end 304 being disposed opposite the second end 306.
• the first end 304 of the body 302 is of a different diameter as compared to the opposing second end 306 of the body 302.
• the first end 304 may be a top end and the second end 306 may be a bottom end of the body 302. If the second end 306 of the diffuser 300 abuts a first end of an adjacent corresponding diffuser, the second end 306 of the diffuser 300 may then matingly fit to the first end of the adjacent corresponding diffuser to achieve a hole and shaft mating fit between the two diffusers, due to the different diameters of the first and second ends.
• the diameter of the first end 304 is greater than the diameter of the second end 306.
• the docking section 308 comprises the through-hole slot or recess 310 and at least one docking connector e.g. 312 for receiving the circuit board.
• the at least one docking connector e.g. 312 may be, but is not limited to, a snap-fit connector for providing a snap-fit connection to the circuit board.
• the location of the at least one docking connector e.g. 312 is fixed in relation to the locations of positioning parts e.g. 324 (described below).
• the diffuser 300 comprises a diffuser stop member capable of cooperating with at least one lens stop member to provide frictional engagement between the diffuser 300 and the lens (not shown).
• the diffuser stop member is provided to prevent free rotation of the diffuser 300 with respect to the lens.
• the diffuser 300 is capable of rotation with respect to the lens upon application of a force to overcome the frictional engagement between the diffuser 300 and the lens.
• the diffuser stop member may also minimise or prevent movement of the diffuser 300 along the axis A with respect to the lens.
• axis A is an axis that is parallel and coincident to a center axis passing through the diffuser 300 and the lens (not shown).
• the diffuser stop member may comprise a fixing connector to secure the diffuser 300 to the lens to provide the frictional engagement or mechanical coupling to minimize or prevent movement of the diffuser 300 along the axis A with respect to the lens.
• the fixing connector may be any form of connector for securing the diffuser 300 to the lens and still providing rotational movement between the diffuser 300 and the lens upon application of a force to overcome the frictional engagement between the diffuser and the lens.
• a fixing connector 331 is exemplarily illustrated as comprising at least one fitting member e.g. 318 and a flange 330 or more particularly, a protruding part 320 of the at least one fitting member e.g. 318 and the flange 330.
• the flange 330 is provided on the outer periphery of the body 302 proximal the first end 304 of the body 302.
• At least one centering member e.g. 314 is provided on / above the flange 330 towards the first end 304.
• the at least one centering member e.g. 314 is adapted to frictionally engage with a centering inner / interior surface of the lens (not shown).
• the centering inner / interior surface of the lens may be a flange which the at least one centering member e.g. 314 abuts against in a direction along the axis A.
• the diffuser 300 comprises three centering members 314 as shown in FIG. 3C.
• the centering members 314 are spaced apart at equal intervals to provide the centering of the diffuser 300 to the lens.
• the centering members 314 may be termed as centering ribs.
• the length of the flange 330 is interrupted by at least one segment comprising the at least one fitting member e.g. 318.
• the at least one fitting member e.g. 318 is provided proximal the first end 304 of the body 302 for frictionally engaging the body 302 with a lens (for example 106 in FIG. 1 ) when the diffuser 300 is inserted in the lens.
• a lens for example 106 in FIG. 1
• the diffuser 300 is fitted to the lens.
• the at least one fitting member e.g. 318 is pivotable about the axis A or about the periphery/circumference of the body 302.
• the at least one fitting member e.g. 318 is provided with a base that is held in place or made rigid and with a movable end 319 that is pivotable about the base. See FIG. 3A.
• the base is provided fixed to light diffusing features 326 (described below).
• the movable end / pivotable end 319 is pivotable towards or away from the axis A and may provide a snap fit to the lens.
• the at least one fitting member e.g. 318 comprises the protruding part 320.
• a further protrusion termed as a nipple 321.
• the nipple 321 extends beyond the protruding part 320. In other exemplary embodiments, the nipple 321 may extend until at least in line with the circumference of the flange 330. If there is more than one fitting member e.g. 318 provided, more than one protruding parts e.g. 320 may be provided.
• the protruding parts e.g. 320 may each be provided with a nipple e.g. 321.
• the at least one fitting member e.g. 318 may be, but is not limited to, a snap-fit connector for providing a snap-fit connection to the lens.
• the protruding part 320 is disposed along the at least one fitting member e.g. 318 such that the snap-fit connector being flexible, is capable of going/staying above a centering inner / interior surface of the lens (described below) e.g. a flange of the lens (not shown) and staying in a corrugations area (described below) of the lens (not shown) with the nipple 321 adapted to frictionally engage the corrugations area of the lens.
• a rotational degree of freedom (about the axis A) is allowed / provided between the diffuser 300 and the lens e.g. rotation may occur upon application of a sufficient rotational force e.g. to overcome the frictional engagement between the nipple 321 and the corrugations area of the lens. That is, with the flexible snap-fit connector of the at least one fitting member e.g. 318 comprising the protruding part 320 and the nipple 321 , upon application of a sufficient rotational force, the nipple 321 may move against the corrugations area of the lens. As such, the nipple 321 is adapted to produce a sound when the diffuser 300 is rotated with respect to the lens.
• the nipple 321 may be termed as a clicking sound rib.
• the protruding part 320 of the at least one fitting member e.g. 318 and the flange 330 are capable of sandwiching a portion of at least one lens stop member e.g. a centering inner / interior surface or flange of the lens therebetween.
• the fixing connector 331 comprising the protruding part 320 and the flange 330 sandwiching the centering inner / interior surface of the lens in-between also prevents the diffuser 300 from moving in the transverse direction i.e. in the direction along the axis A in the lens. That is, the fixing connector 331 prevents the diffuser from moving in the transverse direction. In this arrangement, the diffuser 300 and the lens are prevented from being separated.
• the at least one lens stop member may comprise another portion that is a corrugations area.
• a rotational degree of freedom (about the axis A) is allowed / provided between the diffuser 300 and the lens e.g. rotation may occur upon application of a sufficient rotational force e.g. to overcome the frictional engagement between both the nipple 321 of the at least one fitting member e.g. 318, and the at least one lens stop member.
• the flange 330 is provided extending the longest distance from the body 302.
• the flange 330 forms the greatest width / circumference of the diffuser 300.
• the width / circumference of the flange 330 is complementary to the width / circumference of the lens.
• the diffuser stop member comprises the fixing connector 331 to co-operate with at least one lens stop member of the lens. Free rotation (about the axis A) of the diffuser 300 within the lens may be prevented until a sufficient rotational force is applied to overcome the frictional engagement between the fixing connector 331 and the lens. For example, the rotational force overcomes the frictional engagement between the nipple 321 and the corrugations area of the lens.
• the first end 304 of the diffuser 300 comprises at least one alignment part e.g. 322.
• the second end 306 of the diffuser 300 comprises at least one positioning part e.g. 324.
• the number of alignment parts e.g. 322 correspond to the number of positioning parts e.g. 324.
• the at least one alignment part e.g. 322 and the at least one positioning part e.g. 324 are configured to be of a complementary shape and size such that the at least one alignment part e.g.
• 322 of the diffuser 300 is capable of being matingly engaged with one positioning part 324 of another adjacent corresponding diffuser to allow a center axis of the diffuser to be aligned to a center axis of the adjacent corresponding diffuser and such that respective circuit boards of the diffusers are aligned and connected.
• the alignment part e.g. 322 of the diffuser 300 is engaged with a positioning part e.g. 324 of another adjacent corresponding diffuser
• the docking section 308 may be aligned with the docking section of the adjacent corresponding diffuser.
• the snap-fit connection to the circuit board e.g. 312 may be aligned with the snap-fit connection to the circuit board of the adjacent corresponding diffuser and the two circuit boards may then be subsequently coupled to electrically contact each other in the correct electrical connection orientation.
• the diffuser 300 comprises three alignment parts 322 as shown in FIG. 3A and three positioning parts 324 as shown in FIG. 3B.
• the alignment parts 322 may be termed as alignment ribs and the positioning parts 324 may be termed as alignment slots.
• the at least one alignment part e.g. 322 comprises a first rib disposed on an inner periphery of the first end 304.
• the rib extends inwards from the body 302, towards the axis A.
• the at least one alignment part 322 may comprise a first rib disposed on an outer periphery of the first end.
• the at least one positioning part e.g. 324 comprises an engagement surface for receiving the at least one alignment part e.g. 322.
• the engagement surface is of a complementary shape and size to the first rib.
• the engagement surface may comprise a slot or stepped recess or aperture for insertion of the rib of an adjacent corresponding diffuser, the insertion being along the axis A.
• the first end 304 of the diffuser 300 comprises at least one positioning part and the second end 306 of the diffuser comprises at least one alignment part.
• the components and working of the positioning part and the alignment part in such an exemplary embodiment may be substantially similar to that as described above.
• the body 302 may comprise the light diffusing features 326 for dispersion of light.
• the light diffusing features 326 are formed on part of the external circumferential surface of the body 302.
• the light diffusing features 326 are formed below the flange 330 and towards the second end 306, and above the at least one positioning part 324.
• the location of the light diffusing features 326 may be complementary to the location of the light diffusing features of the lens when the diffuser is attached to the lens in order to achieve the desired or optimized light output from the tower light/signal modules.
• FIG. 7A is a schematic drawing to illustrate insertion/attachment of a circuit board to a diffuser in an exemplary embodiment.
• FIG. 7B is a schematic drawing showing a comparative example to illustrate that a circuit board is disallowed from being inserted into / attached to a diffuser.
• a docking section 716 comprises a through hole slot or recess 704 and at least one docking connector 718 for receiving a circuit board 712. Compare 310 and 312 respectively of FIGS. 3B and 3C. For the circuit board 712, compare 200 of FIGS. 2A to 2E.
• the through hole slot or recess 704 is generated in a substrate disposed within the body 702 of the diffuser 700. For example, the substrate is disposed throughout the area enclosed within the circumference of the body 702. With the through hole slot or recess 704 generated in the substrate, there is formed, from the substrate, a first substrate 706 and a second substrate 708.
• the first substrate 706 comprises a guiding edge 710 such that the first substrate 706 is protruded with respect to the second substrate 708 to prevent an incorrect insertion / attachment of the circuit board 712 to the diffuser 700.
• the guiding edge 710 ensures that the circuit board 712 may only be placed in one direction (see FIG. 7A) i.e. the correct direction / configuration.
• an electrical component 714 is shown disposed on the circuit board 712.
• the guiding edge 710 is provided to allow alignment of a flat base of the circuit board 712.
• the second substrate 708 provides a spatial clearance to accommodate the component 714 of the circuit board 712.
• the component 714 of the circuit board 712 is blocked by the guiding edge 710 if the circuit board 712 is inserted in / attached to the diffuser 700 in the wrong direction / configuration (see FIG. 7B). As such, the circuit board 712 is allowed to be inserted / attached and snapped into the diffuser 700 in only one way using a mechanical poka yoke (or error proofing) design to ensure a good electrical alignment and connection of the circuit boards of different tower signal modules.
• FIG. 4A is a schematic drawing of a lens in an exemplary embodiment prior to attachment to a diffuser.
• FIG. 4B is a top view of the lens in the exemplary embodiment.
• FIG. 4C is another schematic drawing of the lens in the exemplary embodiment.
• FIG. 4D is a bottom view of the lens in the exemplary embodiment.
• FIG. 4E is a front view of the lens in the exemplary embodiment.
• FIG. 4F is a side view of the lens in the exemplary embodiment.
• the lens 400 is substantially similar to the lens 106 as described in FIG. 1 .
• the lens 400 is capable of cooperating with a diffuser (not shown).
• the lens 400 comprises a lens housing such as a substantially cylindrical cover 402.
• the lens housing comprises a first opening 404 and a second opening 406, the first opening 404 being disposed opposite the second opening 406.
• the first opening 404 of the cover 402 is of a different diameter as compared to the opposing second opening 406 of the cover 402.
• the first opening 404 may be a top opening of the cover 402 and the second opening 406 may be a bottom opening of the cover 402.
• the diameter of the first opening 404 is smaller than the diameter of the second opening 406.
• the lens 400 comprises a lens stop member capable of cooperating with at least one diffuser stop member to provide frictional engagement between the diffuser (not shown) and the lens.
• the lens stop member is provided to prevent free rotation of the diffuser with respect to the lens 400.
• the lens 400 is capable of rotation with respect to the diffuser upon application of a force to overcome the frictional engagement between the diffuser and the lens.
• the lens stop member may also minimise or prevent movement of the diffuser along the axis A with respect to the lens 400.
• the lens stop member may comprise a centering inner / interior surface to provide the frictional engagement.
• the lens stop member may also further comprise a corrugations area or corrugations 418.
• a centering inner / interior surface 416 is provided on an inner periphery of the cover 402 proximal a first opening 404 of the cover 402.
• the centering inner / interior surface 416 is in the form of, but is not limited to, a smooth uninterrupted surface in the form of a flange.
• the centering inner / interior surface 416 is adapted to frictionally engage with at least one diffuser stop member such as a fixing connector of a diffuser (for example compare 331 of FIG. 3A).
• a diffuser stop member such as a fixing connector of a diffuser (for example compare 331 of FIG. 3A).
• the center axis of the lens aligns with the center axis of the diffuser and the lens 400 and the diffuser are aligned to each other.
• Transverse movement of the diffuser for example compare 102 of FIG. 1 , 300 of FIG. 3A
• a rotational degree of freedom is allowed / provided between the diffuser and the lens 400 e.g. rotation may occur upon application of a sufficient rotational force e.g. to overcome the frictional engagement between the centering inner / interior surface 416 and the at least one diffuser stop member.
• the corrugations 418 of the lens 400 may frictionally engage with a nipple (for example compare 321 of FIG. 3B) of the diffuser.
• the nipple may be part of the diffuser stop member comprised in the fixing connector.
• a rotational degree of freedom (about the axis A) is allowed / provided between the diffuser and the lens 400 e.g. rotation may occur upon application of a sufficient rotational force e.g. to overcome the frictional engagement between the corrugations 418 and the nipple of the diffuser.
• the corrugations 418 are provided proximal the first opening 404 and above/adjacent the centering inner / interior surface 416.
• the corrugations 418 are provided in a continual, undulating and uninterrupted manner / surface around the inner periphery of the cover 402.
• at least one centering member for example compare 314 of FIGS. 3A, 3C, 3D and 3E
• the diffuser for example compare 102 of FIG.1 , 300 of FIGS. 3A to 3E
• the at least one fitting member for example compare 318 of FIGS. 3A and 3D
• the nipple for example compare 321 of FIGS.
• the corrugations 418 are adapted for frictionally engaging a nipple (for example compare 321 of FIGS. 3B and 3C) of the diffuser when the diffuser is inserted in the lens 400.
• the corrugations 418 are further adapted for producing a sound when the nipple (for example compare 321 of FIGS. 3B and 3C) of the diffuser (for example compare 102 of FIG.1 , 300 of FIGS. 3A to 3E) frictionally contacts the crests and troughs of the undulating corrugations 418 as the diffuser is rotated with respect to the lens 400.
• the cover 402 may further comprise lens light diffusing features 426 for dispersion of light.
• the lens light diffusing features 426 are formed on part of the circumferential surface of the cover 402. As shown in FIG. 4A, the lens light diffusing features 426 are formed below the centering inner / interior surface 416.
• the lens 400 further comprises at least one first locking part 408 proximal the first opening 404 and a corresponding number of second locking part 410 proximal the second opening 406.
• the lens 400 may further comprise a gasket compression groove (not shown) disposed about the circumference of the second opening 406 of the cover 402.
• the at least one first locking part 408 and the second locking part 410 are provided complementary to each other.
• the first locking part 408 is adapted to interact with and matingly engage with the second locking part 410 of an adjacent corresponding lens to secure / lock one lens to the adjacent lens.
• the first locking part 408 may be a component having two travelling edges 407, 409.
• the travelling edge 407 may be termed an upper travelling edge and the travelling edge 409 may be termed a lower travelling edge.
• the lower travelling edge 409 is coupled to a vertical stopper wall 411 .
• the second locking part 410 may be in the form of a rib disposed on a periphery of the cover 402 e.g. extending inwards from the cover 402, towards the axis A.
• a gasket may be provided adjacent the lower travelling edge 409, e.g. for sealing purposes. It will be appreciated that the second locking part 410, during locking, is not able to be under, or along, the lower travelling edge 409.
• FIG. 8 is a schematic drawing illustrating part of an exploded cross-sectional view of two tower signal modules assembled in an exemplary embodiment.
• the second locking part (compare 410 of FIG. 4C) of the first lens 806 of the first tower signal module 802 travels on the upper travelling edge (compare 407 of FIG. 4E) of the second lens 808 of the second tower signal module 804.
• the first lens 806 is moved towards, e.g. down to, the second lens 808, a gasket compression groove 810 of the first lens 806 contacts a top surface of the gasket 812 of the second lens 808.
• the second locking part (compare 410 of FIG. 4C) of the first lens 806 abuts the vertical stopper wall (compare 411 of FIG. 4E) of the second lens 808.
• the second locking part of the first lens 806 may not contact the gasket 812 depending on the shape and compression of the gasket, and the shapes of one or more gasket compression grooves.
• At least one of the first locking parts may further comprise a stopper locking rib 428 disposed adjacent/beside the vertical stopper wall 411.
• At least one of the second locking parts 410 of an adjacent lens may comprise a stopper groove or recess (not shown) configured to accommodate the stopper locking rib 428.
• the stopper groove or recess is provided on a top surface of the at least one of the second locking parts 410, i.e. exposed towards the first opening 404.
• the stopper locking rib 428 of a lens is arranged to snap into / engage the stopper groove of one of the second locking parts 410 of an adjacent lens.
• This stopper locking rib connection prevents further clockwise or anticlockwise rotation of the adjacent lens with respect to each other. Locking may occur when the lens 400 is rotated with respect to an adjacent lens until the second locking part 410 of the lens 400 abuts the vertical stopper wall 411 of the adjacent lens and a stopper locking rib 428 of the adjacent lens is engaged with a corresponding stopper groove or recess of the second locking part 410 of the lens 400. After the stopper locking rib 428 of the lens and the stopper groove of one of the second locking parts 410 of the adjacent lens are engaged, the vertical stopper wall 411 abuts/blocks the corresponding second locking part 410 if the user continues to try to rotate the lenses. The above arrangement results in a locked position.
• the lenses can be disconnected by e.g. an anti-clockwise rotation with respect to each other, which unsnaps / disengages the stopper locking rib connection between the stopper locking rib 428 and the corresponding stopper groove of the second locking part 410 of the adjacent lens.
• FIG. 5A is a perspective view of a tower signal module in an exemplary embodiment.
• FIG. 5B is a bottom view of the tower signal module in the exemplary embodiment.
• FIG. 5C is a top view of the tower signal module in the exemplary embodiment.
• FIG. 5D is a side view of the tower signal module in the exemplary embodiment.
• FIG. 5E is a cross-sectional view of the tower signal module along the line AA of FIG. 5D.
• the tower signal module 500 is substantially similar to the tower signal module 100 as described in FIG. 1 .
• the components of the tower signal module 500 are referenced to using the same terminology.
• the tower signal module 500 comprises a diffuser 502, a circuit board 504 and a lens 506.
• the diffuser 502 is substantially similar to the diffuser 300 of FIGS. 3A to 3E.
• the components of the diffuser 502 are referenced to using the same terminology.
• the circuit board 504 is substantially similar to the circuit board 200 of FIGS. 2A to 2E.
• the components of the circuit board 504 are referenced to using the same terminology.
• the lens 506 is substantially similar to the lens 400 of FIGS. 4A to 4F. The components of the lens 506 are referenced to using the same terminology.
• the circuit board 504 is inserted into a docking section 508 of the diffuser 502.
• the docking section 508 comprises a recess 510 and at least one docking connector 512 for receiving the circuit board 504.
• the at least one docking connector 512 may be, but is not limited to, a snap-fit connector for providing a snap-fit connection to the circuit board 504. Therefore, the circuit board 504 may be connected to the diffuser 502 by the at least one snap-fit connector 512.
• the diffuser 502 which is connected to the circuit board 504, is inserted into the lens 506.
• At least one centering member 514 of the diffuser 502 which is provided on or above a flange (not shown, compare 330 of FIGS. 3A, 3D and 3E) of the diffuser, frictionally engages with a centering inner / interior surface 516 of the lens 506.
• Engagement of the at least one centering member 514 to the centering inner / interior surface 516 aligns the center axis of the diffuser 502 and the center axis of the lens 506.
• At least one fitting member 518 of the diffuser 502 frictionally engages the diffuser 502 with the lens 506, to cause the diffuser 502 to be fitted to the lens 506.
• the diffuser 502 may be snap-fitted to the lens 506 using the pivotable at least one fitting member 518 with its protruding part e.g. 520.
• the protruding part e.g. 520 and a flange (compare 330 of FIGS. 3A, 3D and 3E) of the diffuser 502 sandwich the centering inner / interior surface 516 of the lens 506.
• the diffuser 502 is movably engaged with the lens 506.
• a rotational degree of freedom (about an axis parallel to line AA) is provided between the diffuser 502 and the lens 506. For example, upon application of a sufficient rotational force to the lens 506, the force may overcome the frictional force between the diffuser 502 and the lens 506 such that the lens 506 may rotate independently of the diffuser 502.
• a gasket (not shown) may be fitted onto the lens 506 along a groove 522 to allow a fitted connection between one lens and an adjacent corresponding lens.
• the gasket may provide a sealing for ingress protection.
• the groove 522 comprises a difference 524 in diameter between a first opening (for example compare 404 of FIG. 4A) and a second opening (for example compare 406 of FIG. 4C) of the lens 506.
• one of the fitting members 518 further comprises a nipple 521 extending beyond a protruding part 520 of the diffuser 502.
• a nipple 521 extending beyond a protruding part 520 of the diffuser 502.
• the nipple 521 is capable of frictionally engaging an interior surface of the lens 506 to produce a sound when the diffuser 502 is rotated with respect to the lens 506. Compare sound making rib 321 of FIG. 3B and corrugations 418 of FIG. 4A.
• a first end (for example compare 304 of FIG. 3A) of the diffuser 502 is complementary to a second end (for example compare 306 of FIG. 3A) of the diffuser such that after the diffuser 502, the circuit board 504 and the lens 506 are assembled to form multiple tower signal modules 500, the second end of a first diffuser is fitted into the first end of a second diffuser to provide a fitting mechanical contact between the first diffuser and the second diffuser.
• FIGS. 6A to 6E are schematic drawings for illustrating the steps of assembling two tower signal modules in an exemplary embodiment.
• FIGS. 6A(i) to (v) illustrate the various views in a possible first step of assembling two tower signal modules in the exemplary embodiment.
• FIG. 6A(i) is a perspective view of the two tower signal modules in the exemplary embodiment.
• FIG. 6A(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6A(iii).
• FIG. 6A(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6A(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6A(iii).
• FIG. 6A(v) is the right view of diffusers of the two tower signal modules to illustrate the respective positions of the diffusers disposed inside/within the respective tower signal modules shown in FIG. 6A(i).
• a first tower signal module 600 comprising a first diffuser 602, a first circuit board 604 and a first lens 606, is assembled.
• a second tower signal module 640 comprising a second diffuser 642, a second circuit board 644 and a second lens 646, is assembled.
• the first tower signal module 600 is substantially similar to the second tower signal module 640.
• Both the first tower signal module 600 and the second tower signal module 640 are substantially similar to the tower signal module 500 as described in FIGS. 5A to 5E.
• the components of the tower signal modules 600 and 640 are referenced to using the same terminology.
• a first end 616 of the first diffuser 602 is of a different diameter as compared to an opposing second end 617 of the first diffuser 602.
• a third end 656 of the second diffuser 642 is of a different diameter as compared to an opposing fourth end 657 of the second diffuser.
• the first tower signal module 600 is placed adjacent the corresponding second tower signal module 640 with one (600) on top of the other (640).
• the first diffuser 602 and the second diffuser 642 are positioned and dimensioned such that the second end 617 of the first diffuser 602 may be fitted into the third end 656 of the second diffuser 642.
• the dimensions and positions of the second end 617 and the third end 656 may allow the first tower signal module 600, when placed above the second tower signal module 640, to sit / rest on the second tower signal module 640 in the beginning steps of assembling the two modules 600, 640 together.
• the center axis of the first tower signal module 600 is shown as axis X and the center axis of the second tower signal module 640 is shown as axis Y.
• the first tower signal module 600 and the second tower signal module 640 are aligned such that axis X and axis Y coincide to form an axis of joining Z between the two tower signal modules 600, 640.
• the first tower signal module 600 and the second tower signal module 640 are therefore aligned along the axis of joining Z.
• the first circuit board 604 and the second circuit board 644 are not aligned to each other even though the first tower signal module 600 and the second tower signal module 640 are aligned along the axis of joining Z. Thus, the first circuit board 604 and the second circuit board 644 may not be connected electrically.
• the first diffuser 602 and the second diffuser 642 may be in a random position with respect to each other even though a center axis Xi of the first diffuser 602 and a center axis Yi of the second diffuser 642 are aligned to each other.
• FIGS. 6B(i) to (v) illustrate the various views in a possible second step of assembling two tower signal modules in the exemplary embodiment.
• FIG. 6B(i) is a perspective view of the two tower signal modules in a stack in the exemplary embodiment.
• FIG. 6B(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6B(iii).
• FIG. 6B(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6B(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6B(iii).
• FIG. 6B(v) is the right view of the diffusers of the two tower signal modules to illustrate the respective positions of the diffusers.
• a rotational force and/or a pushing force is exerted on the top most tower signal module, e.g. module 600, since an addition to a tower signal indicator may be from the top of the tower signal indicator in a top-down direction.
• a downward force F (as shown in FIG. 6B(iii)) is applied along the axis of joining Z to push the first tower signal module 600 and the second tower signal module 640 together.
• the first tower signal module 600 is abutted against the second tower signal module 640 such that the second end 617 of the first diffuser 602 is matingly fitted to the third end 656 of the second diffuser 642 to achieve a hole and shaft mating fit between the first diffuser 602 and the second diffuser 642.
• the first diffuser 602 with its diffuser stop member cooperating with a lens stop member of the first tower signal module 600, is moved along the axis of joining Z with the first tower signal module 600 upon application of the force F e.g. on the first lens 606.
• the second end 617 which forms a shaft section is matingly fitted to the third end 656 which forms a hole section.
• the first circuit board 604 and the second circuit board 644 are not yet aligned to each other. There is no electrical contact between the first circuit board 604 and the second circuit board 644.
• the principle used is based on a self-aligning, push and rotate methodology.
• the first tower signal module 600 and the second tower signal module 640 are first fitted together prior to alignment (as described above). There is a distinction between fitting and alignment.
• the first tower signal module 600 and the second tower signal module 640 are then aligned such that the first diffuser 602 of the first tower signal module 600 and the second diffuser 642 of the second tower signal module 640 may be engaged as a joined diffuser member.
• the single joined diffuser member is formed (shown in more detail at FIG.
• the first circuit board 604 of the first tower signal module 600 and the second circuit board 644 of the second tower signal module 640 are then electrically coupled.
• the first lens 606 of the first tower signal module 600 may then be rotated with respect to the second lens 646 of the second tower signal module 640 when a sufficient rotational force is imparted to the first lens 606 to overcome the frictional force between the second diffuser 642 and the second lens 646, and while the first diffuser 602 is coupled to/with the second diffuser 642. That is, the first lens 606 may be rotated together with the joined diffuser member. Rotation of the first lens 606 may then lead to an engagement of the first lens 606 with the second lens 646 of the second tower signal module 640.
• FIGS. 6C(i) to (vi) illustrate the various views in a possible third step of assembling two tower signal modules in the exemplary embodiment.
• FIG. 6C(i) is a perspective view of the two tower signal modules in the exemplary embodiment.
• FIG. 6C(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6C(iii).
• FIG. 6C(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6C(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6C(iii).
• FIG. 6C(v) is a perspective view of the diffusers of the two tower signal modules to illustrate the respective positions of the diffusers.
• FIG 6C(vi) is a top view of the tower signal module 600.
• the first tower signal module 600 is rotated clockwise about the axis of joining Z with respect to the second tower signal module 640.
• a downward force Fi (as shown in FIG. 6C(iii)) is applied along the axis of joining Z to push the first tower signal module 600 and the second tower signal module 640 together.
• a fitting member 618 of the first diffuser 602 as part of the diffuser stop member, is frictionally engaged to the first lens 606.
• a protruding part 620 for example, compare 320 in FIG. 3B
• a flange for example, compare 330 in FIG.
• first diffuser 602 is frictionally engaged with or sandwich a centering inner/interior surface of the first lens 606 (for example compare 416 in FIG. 4A) as part of, or as, the diffuser stop member.
• the first diffuser 602 rotates together with the first lens 606.
• the nipple 621 of the first diffuser 602 is in contact with corrugations 628 of the first lens 606. There is no clicking sound produced when the first tower signal module 600 is rotated since the first diffuser 602 and the first lens 606 rotate together as a single unit.
• FIGS. 6D(i) to (vi) illustrate the various views after the third step of assembling two tower signal modules as shown in FIGS. 6C(i) to (vi) in the exemplary embodiment.
• FIG. 6D(i) is a perspective view of the two tower signal modules in the exemplary embodiment.
• FIG. 6D(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6D(iii).
• FIG. 6D(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6D(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6D(iii).
• FIG. 6D(v) is a perspective view of the diffusers of the two tower signal modules to illustrate the respective positions of the diffusers.
• FIG. 6D(vi) is a bottom cross- sectional view of the two tower signal modules along the line BB of FIG. 6D(iii).
• the first tower signal module 600 is rotated clockwise about the axis of joining Z until the at least one alignment part (not shown) of the second diffuser engages with the at least one positioning part 624 (shown in FIG. 6C(v)) of the first diffuser 602. Compare also the alignment part 322 of FIG. 3A and the positioning part 324 of FIG. 3A.
• the first tower signal module 600 may be rotated anti-clockwise about the axis of joining Z until the at least one alignment part (not shown) of the second diffuser engages with the at least one positioning part 624 (shown in FIG. 6C(v)) of the first diffuser 602. When the positioning part 624 (shown in FIG.
• the circuit boards 604, 644 are also aligned for connection. Subsequently, the first diffuser 602 and the second diffuser 642 are pushed together along the axis Z, the two circuit boards 604, 644 are electrically connected.
• the at least one alignment part (not shown) of the second diffuser 642 is aligned / engaged with the positioning part 624 (shown in FIG. 6C(v)) of the first diffuser 602
• a further pushing action / downward force F 3 causes the first diffuser 602 and the second diffuser 642 to be connected / frictionally engaged to each other.
• the positioning part (compare 324 of FIG. 3A) of the first diffuser 602 is capable of moving towards the second diffuser 642.
• the at least one alignment part of the second diffuser 642 may matingly engage with the at least one positioning part 624 (shown in FIG. 6C(v)) of the first diffuser 602 in an abutment and rotational movement until engagement.
• the first circuit board 604 and the second circuit board 644 are pushed together.
• the first diffuser 602 and the second diffuser 642 are engaged with respect to each other e.g. become a joined diffuser member.
• the diffuser 300 of FIG. 3A moving in the transverse direction along axis Z to the adjacent corresponding diffuser 300 of FIG. 3A.
• the second tower signal module 640 held in place e.g. by a user holding onto the second lens 646, with continued rotation of the first lens 606 with respect to the second lens 646, the first lens 606 with a second locking part (for example, compare 410 of FIG.
• first tower signal module 600 and the second tower signal module 640 are brought closer to each other along the axis of joining Z.
• a first electrical connector 648 of the second circuit board 644 electrically contacts a second electrical connector 608 of the first circuit board 604 (for example, compare the first electrical connector 204 in FIG. 2A of the second circuit board electrically contacting the second electrical connector 206 in FIG. 2A of the first circuit board).
• a gap between a second opening of the first lens 606 and a groove proximal (for example, compare groove 522 in FIG. 5A) a third opening of the second lens 646 is reduced. Thereafter, the next step of lens locking starts.
• FIGS. 6E(i) to (vi) illustrate the various views in a possible fourth step of assembling two tower signal modules in the exemplary embodiment.
• FIG. 6E(i) is a perspective view of the two tower signal modules in the exemplary embodiment.
• FIG. 6E(ii) is a cross-section of the perspective view of the two tower signal modules along the line AA of FIG. 6E(iii).
• FIG. 6E(iii) is a front view of the two tower signal modules in the exemplary embodiment.
• FIG. 6E(iv) is a right cross-section view of the two tower signal modules along the line AA of FIG. 6E(iii).
• FIG. 6E(v) is a perspective view of the diffusers of the two tower signal modules to illustrate the respective positions of the diffusers.
• FIG 6E(vi) is a bottom cross- sectional view of the two tower signal modules along the line BB of FIG. 6E(iii).
• the first tower signal module 600 and the second tower signal module 640 are continued to be pushed together along the axis of joining Z by a force F as shown in FIG. 6E(iii).
• the first tower signal module 600 is rotated clockwise about the axis of joining Z with respect to the second tower signal module 640. Since the alignment part (not shown) of the second diffuser 642 is already fixingly engaged with the positioning part 624 (shown in FIG. 6C(v)) of the first diffuser 602 e.g.
• the first diffuser 602 and the second diffuser 642 have joined to become a joined diffuser member, as described above, the second diffuser 642 is held in place by the first diffuser 602 which is in frictional engagement with the first lens 606.
• the joined diffuser member rotates with the first tower signal module 600 while the second lens 646 is held in place by an operator / user and thus, the joined diffuser member rotates with respect to the second lens 646.
• the first lens 606 and the joined diffuser member rotate together about the axis of joining Z upon application of a sufficient rotational force at the first lens 606 to overcome the frictional force between the diffuser stop member of the second tower signal module 640 and the second lens 646, for example between the nipple of the second diffuser 642 (compare 321 of FIG. 3B) and a portion of the lens stop member of the second lens 646, e.g. the corrugations area of the lens (compare for example 418 of the lens of FIG. 4A).
• the first lens 606 and the joined diffuser member rotate together about the axis of joining Z. During this rotation, the nipple (compare 321 of FIG.
• the second diffuser 642 contacts / passes or rubs against the corrugations (not shown) of the second lens 646.
• the nipple sits between two peaks of the corrugations area, or e.g. in a trough. The positioning between two peaks restricts / limits the rotational movement of the second diffuser 642 with respect to the respective lens. That is, the nipple of the second diffuser 642 is maintained in place by the two peaks.
• the nipple is located on at least one protruding part (compare 320 of FIG. 3B) of at least one fitting member of the second diffuser 642.
• the at least one fitting member comprises a base that is held in place or made rigid and a movable end (for example compare 319 of FIG. 3A) that is pivotable about the base.
• the movable/pivotable end provides a snap-fit.
• the nipple knocks against the corrugations area, e.g. the peaks and troughs, due to the snap-fit of the at least one fitting member to produce a sound. That is, the snap-fit of the at least one fitting member biases the fitting member comprising the nipple against the corrugations area of the lens. Compare the clicking sound rib 321 of FIG. 3B and the corrugations 418 of FIG. 4A. The frictional contact causes a sound to be produced. The sound may indicate the start of the locking process between the first tower signal module 600 and the second tower signal module 640.
• the rotation action of the first lens 606 aligns a first locking part of the second lens 646 with a second locking part of the first lens 606. Compare the first locking part 408 and the second locking part 410 of FIG. 4C. As described above, the second locking part (compare 410 of FIG. 4C) of the first lens 606 travels along a horizontal plane at least above the lower travelling edge (compare 409 of FIG. 4E) of the second lens 646. Upon alignment of the first locking part of the second lens 646 and the second locking part of the first lens 606, the further pushing action or force F causes the first tower signal module 600 and the second tower signal module 640 to join fully along the axis of joining Z.
• first tower signal module 600 Further rotation of the first tower signal module 600 in the clockwise direction causes the first locking part of the second lens 646 to interact with the second locking part of the first lens 606 to cause the first lens 606 and the second lens 646 to lock with each other to achieve the complete joining of the first tower signal module 600 and the second tower signal module 640.
• the complete joining is achieved when the second locking part of the first lens 606 abuts a vertical stopper wall (compare 411 of FIG. 4E) of the second lens 646, and the first lens 606 and the second lens 646 are prevented from further clockwise rotation with respect to each other.
• the second locking part of the first lens 606 is engaged with the first locking part of the second lens 646. See 650 of FIG. 6E(vi).
• the second locking part of the first lens may matingly engage with the first locking part of the second lens in an abutment and rotational movement until engagement.
• one of the first locking parts comprises a stopper locking rib (for example, compare 428 of FIG. 4E) beside the vertical stopper wall.
• the stopper locking rib of the second lens 646 snaps into / engages the stopper groove of one of the second locking parts of the first lens 606. While the vertical stopper wall of the second lens 646 prevents further clockwise rotation, this stopper locking rib connection prevents anticlockwise rotation of the first lens 606 and the second lens 646 with respect to each other. The sound ceases to be produced upon locking of the first lens 606 and the second lens 646.
• a first diffuser (without fitting to a first lens) may first be fitted onto a tower signal module comprising a second diffuser fitted to a second lens.
• the first diffuser may be pushed against and rotated with respect to the second diffuser for alignment of the first diffuser to the second diffuser.
• the first diffuser and the second diffuser may then be matingly engaged to form the joined diffuser member.
• the first lens may then be fitted over the joined diffuser member (over the first diffuser).
• the first lens may then be pushed against and rotated with respect to the second lens for alignment of the first lens to the second lens.
• the first lens and the second lens may then be matingly engaged to complete the assembly.
• disjoining or disassembly of the first tower signal module 600 and the second tower signal module 640 is achieved by rotating the first tower signal module 600 anticlockwise (or opposite to the rotational direction used for joining) about the axis of joining Z with respect to the second tower signal module 640.
• the first tower signal module 600 and the second signal module 640 are then pulled apart along the axis of joining Z, which is also the axis of disjoining. This causes the first tower signal module 600 and the second signal module 640 to be disjoined /disconnected from each other.
• a label or a paper may be pasted or attached to specific areas e.g. on a bottom surface of the diffuser (for example compare first substrate 706 and second substrate 708 of FIG. 7A) to prevent light from a light source to be emitted through parts of the diffuser e.g. 300 and/or the lens e.g. 400.
• the label or paper may be substantially opaque. For example, it may be desired that certain tower signal modules may not emit light through the bottom of the tower signal module so as to avoid interference with the light output of other lower tower signal modules of a tower signal indicator.
• the label or paper pasted on the first substrate and the second substrate limit most or all of the light output from the light source inside the diffuser and prevent the light output from being leaked to the other tower signal module that is attached below it. Clearer separation of light emission from each tower signal module in this manner is beneficial to operators / users as the light signals from each tower signal module become more distinct and clear.
• a diffuser for a tower signal module the diffuser being capable of cooperating with a lens.
• the diffuser comprises a diffuser housing having a first end and a second end, the first end being disposed opposite the second end.
• the first end comprises at least one alignment part and the second end comprises at least one positioning part.
• the at least one alignment part and the at least one positioning part are complementary to each other and the at least one alignment part is capable of being matingly engaged to the at least one positioning part of an adjacent corresponding diffuser.
• the diffuser further comprises a docking section disposed in the diffuser housing for receiving a circuitry component.
• the diffuser further comprises a diffuser stop member capable of cooperating with at least one lens stop member to provide frictional engagement between the diffuser and the lens.
• the diffuser is capable of rotation with respect to the lens upon application of a force to overcome the frictional engagement between the diffuser and the lens.
• the diffuser stop member may comprise a fixing connector to secure the diffuser to the lens to provide the frictional engagement.
• the fixing connector may comprise a flange and a protruding part disposed on a fitting member, the flange and the protruding part being capable of sandwiching a portion of the at least one lens stop member therebetween.
• the flange is disposed at a distance from the protruding part.
• the protruding part may comprise a nipple extending from the protruding part for contacting a first interior surface of the lens that may form another portion of the at least one lens stop member, the nipple being capable of producing a sound upon rotation of the diffuser with respect to the lens.
• the first end of the diffuser housing may have a different dimension to the second end of the diffuser housing, and the first end may be capable of being fitted with the second end of an adjacent corresponding diffuser.
• the at least one alignment part may comprise a first rib disposed on a periphery, e.g. inner or outer, of the diffuser housing.
• the at least one positioning part may comprise an engagement surface for receiving the at least one alignment part.
• the at least one alignment part may matingly engage the at least one positioning part via an abutment and rotation movement with respect to each other.
• a lens for a tower signal module the lens being capable of cooperating with a diffuser.
• the lens comprises a lens housing having a first opening and a second opening, the first opening being disposed opposite the second opening.
• the lens also comprises at least one first locking part proximal the first opening and at least one second locking part proximal the second opening.
• the at least one first locking part and the at least one second locking part are complementary to each other and the at least one first locking part is capable of being matingly engaged to the at least one second locking part of an adjacent corresponding lens.
• the lens further comprises a lens stop member capable of cooperating with at least one diffuser stop member to provide frictional engagement between the diffuser and the lens.
• the lens is capable of rotation with respect to the diffuser upon application of a force to overcome the frictional engagement between the diffuser and the lens.
• the lens stop member may comprise a centering interior surface to frictionally engage with the at least one diffuser stop member.
• the centering interior may be a flange of the lens that may be sandwiched between a flange and a protruding part of the at least one diffuser stop member.
• the lens stop member may also further comprise a corrugations area or corrugations to frictionally engage with a nipple of the protruding part of the at least one diffuser stop member.
• the corrugations area may be a form of an undulating surface for contacting the nipple of the diffuser for producing a sound upon rotation of the diffuser with respect to the lens.
• the first opening of the lens housing may have a different dimension to the second opening of the lens housing.
• the forces are termed differently, e.g. Fi, F etc., the force may be a same force or a constant force being applied during assembly or disassembly.
• the term “matingly engaged” or “mating engagement” etc. refer to e.g. the diffuser being mated to another diffuser such that the diffusers are not capable of rotation with respect to each other, i.e. forming a joined diffuser member.
• the adjacent tower signal modules are connected / joined to each other in a manner similar to bayonet fitting without springs. Once the adjacent tower signal modules are aligned to each other, a pushing force may cause the adjacent tower signal modules to join fully along an axis of joining.
• the described exemplary embodiments may provide a tower signal module kit that comprises a diffuser as exemplarily described and a lens as exemplarily described.
• the diffuser and the lens may be provided separately or alternatively, may be provided in frictional engagement.
• the arrangement may also be termed as a tower signal module (i.e. alternative to a "kit").
• the self-aligning push-and-rotate joining principle / mechanism allows an easy, fast, intuitive and robust joining of tower signal modules. Users may no longer have to visually align surface markings of tower signal modules for joining of the tower signal modules. Instead, the tower signal modules are aligned along their axis of joining, and then pushed together along the axis of joining while being rotated e.g. a top tower signal module may be rotated clockwise about the axis of joining with respect to a bottom tower signal module until no more clicking sound is heard.
• the described exemplary embodiments may also provide a better dust-proof and waterproof sealing (due to better fitting of the modules and e.g. usage of a gasket) between adjacent tower signal modules, more room for better light diffusing / diffusion features, and cost reduction due to removal of the need for surface markings for alignment of the tower signal modules.
• the exemplary embodiments may be applied to any system where it is desired for specially aligned electrical connections between two similar / identical components which may be joined together through self-alignment and rotary locking.
• the speed and ease of assembling tower signal modules may be improved since there is no need to visually align the tower signal modules when joining / connecting adjacent tower signal modules.
• the tower signal modules in terms of mechanical and electrical connections, are self-aligned through the mechanisms described above.
• the adjacent tower signal modules are self-aligned once the alignment part of a diffuser of one tower signal module is engaged with the positioning part of another diffuser of the adjacent tower signal module.
• the described exemplary embodiments may remove the need to do visual alignment of the tower signal modules which may be inconvenient to users since the visual markings may not be easily visible due to unfavourable lighting condition and e.g. height during assembly at the top of a tower signal indicator or in industrial / factory environments.
• the manufacturing cost may be reduced since the process of applying the outer surface markings may be removed.
• the absence of the alignment markings may also improve the aesthetics of the tower signal modules.
• mechanical and electrical connections between adjacent tower signal modules may be achieved when the tower signal modules are aligned and joined / connected to one another.
• the locking / connection features of adjacent tower signal modules may improve the mechanical and electrical connections between the tower signal modules.
• There is a robust and sturdy mechanical connection which keeps the tower signal modules together by locking them in position for example by the interaction between an alignment part and a positioning part of adjacent diffusers respectively, and the interaction between a first locking part and a second locking part of adjacent lens respectively.
• the electrical connectors are linked / coupled in the correct orientation for the electrical components to function as designed.
• the cost of producing / manufacturing the tower signal modules may be reduced as the number of separate components / parts for production of the tower signal module may be reduced.
• adjacent tower signal modules may be substantially similar and may not require the use of separate different parts across adjacent modules.
• the complexity of producing the separate components / parts for the tower signal module is also reduced.
• only the diffuser, the circuit board and the lens may be provided for each tower signal module.
• the performance of light dispersion of the tower signal module may be improved.
• a tower signal module that is used for emitting light there is more space for light guides or light diffusing features on the lens and the diffuser to provide a better and well-dispersed light output with reduced or without blind spots otherwise caused by internal structures of the diffuser or the lens that block the light output.
• This may maximize the usage of the light output from the light source in the tower signal module to provide a clearer and more uniform light output to users.
• It is desirable for a tower light module to provide a bright and/or clear light output for signaling to a user.
• the light source may be a light emitting diode (LED) on a circuit board.
• the product labels may provide product information to users and may also function as opaque light blockers to e.g. prevent light overflow between tower signal modules. Such light overflow may cause confusion to users as one tower signal module which is lit may cause neighbouring tower signal modules to be slightly illuminated. This may result in unclear visual light signal output to users.
• an additional mechanical light blocking part in a tower signal module to prevent the overflow of light may be removed, the cost of production of the tower signal module may be reduced.
• the use of, for example, product labels may provide a clear and distinct visual signal output to users from a specific tower signal module without interference from neighbouring tower signal modules.
• a clicking sound may be produced during the locking process until the adjacent tower signal modules are fully locked to each other and no more rotation is possible.
• This may allow users to ensure complete locking of the tower signal modules in a more intuitive and simple manner. It may improve the ease of assembly of the tower signal modules and usage safety of the tower signal modules.
• the auditory cue may allow users to intuitively understand that full locking of the adjacent tower signal modules is achieved. This may be significant for safe tower signal module assembly and use, with the desired mechanical and electrical connections between the tower signal modules.
• the gasket fitted onto the lens may improve the sealing level for the tower signal modules, for example for dust-proofing and water-proofing.
• the tower signal modules may achieve a higher Ingress / International Protection (IP) Rating since the circuit board and/or electrical enclosures within the lens are protected from, for example, foreign objects, dust, accidental contact and water. This may improve the performance of the tower signal modules.
• IP International Protection
• Coupled or “connected” as used in this description are intended to cover both directly connected or connected through one or more intermediate means, unless otherwise stated.
• the disclosure may have disclosed a method and/or process as a particular sequence of steps. However, unless otherwise required, it will be appreciated the method or process should not be limited to the particular sequence of steps disclosed. Other sequences of steps may be possible. The particular order of the steps disclosed herein should not be construed as undue limitations. Unless otherwise required, a method and/or process disclosed herein should not be limited to the steps being carried out in the order written. The sequence of steps may be varied and still remain within the scope of the disclosure.
• the word “substantially” whenever used is understood to include, but not restricted to, “entirely” or “completely” and the like.
• terms such as “comprising”, “comprise”, and the like whenever used are intended to be non-restricting descriptive language in that they broadly include elements/components recited after such terms, in addition to other components not explicitly recited.
• reference to a “one” feature is also intended to be a reference to “at least one” of that feature.
• Terms such as “consisting”, “consist”, and the like may, in the appropriate context, be considered as a subset of terms such as “comprising”, “comprise”, and the like.
• the tower signal modules are described as used for emission of light. However, the use is not limited as such.
• the tower signal modules may be modified for emission of sound and/or power input and/or power conversion etc.
• the circuit board is described as comprising a first electrical connector (e.g. 204 in FIG. 2A) at one end and a second electrical connector (e.g. 206 in FIG. 2A) at an opposing end.
• a first electrical connector e.g. 204 in FIG. 2A
• a second electrical connector e.g. 206 in FIG. 2A
• the exemplary embodiments are not limited as such.
• the number of the first electrical connector(s) and the number of the second electrical connector(s) are complementary to each other, e.g. such that two circuit boards may be electrically connected via the first electrical connector(s) and the second electrical connector(s).
• the nipple or the clicking sound rib (compare e.g. 321 of FIG. 3B) of the diffuser is described as disposed on one protruding part (compare e.g. 320 of FIG. 3B) of the fitting member (compare e.g. 318 of FIG. 3A).
• the exemplary embodiments are not limited as such.
• the nipple or the clicking sound rib may be disposed on any part of the diffuser. Alternatively, it may also be provided that the nipple or the clicking sound rib may be optional in some other exemplary embodiments.
• nipple there is one nipple e.g. 321 on the diffuser.
• the exemplary embodiments are not limited as such and there may be any number of nipples provided.
• the diameter of the top part of the diffuser is different from the diameter of the bottom part of the diffuser, and it is then further described that a top end has a larger diameter than a bottom end.
• the exemplary embodiments are not limited as such.
• the bottom end may have a larger diameter than the top end.
• the diameter of the top part of the lens is different from the diameter of the bottom part of the lens and it is then described that a bottom end has a larger diameter than a top end.
• the exemplary embodiments are not limited as such.
• the top end may have a larger diameter than the bottom end.
• the rib of the alignment part extends inwards from the body towards the axis A and the rib of the second locking part extends inwards from the cover towards the axis A.
• the exemplary embodiments are not limited as such.
• the rib of the alignment part may extend outwards from the body away from the axis A and the rib of the second locking part may extend outward from the cover away from the axis A.
• the centering members e.g. 314 are spaced apart along the circumference of the body e.g. 302 of the diffuser. There may be any number of centering members. For example, in some other exemplary embodiments, there may be only one centering member.
• the alignment part e.g. 322 on the diffuser.
• first locking part e.g. 408 on the lens.
• second locking part e.g. 410 on the lens.
• the diffuser is described as comprising a flange extending from a diffuser housing and the flange is shown to have a circumference or perimeter or distance similar to the circumference or perimeter or distance of the diffuser housing.
• the flange is not limited as such.
• the flange may have a significantly shorter circumference or perimeter or distance as compared to the circumference or perimeter or distance of the diffuser housing.
• the centering interior surface of the lens may be in the form of a flange.
• such a flange is also not limited to having a circumference or perimeter or distance similar to the circumference or perimeter or distance of the interior of the lens.
• the flange may have a significantly shorter circumference or perimeter or distance as compared to the circumference or perimeter or distance of the interior of the lens.
• the first end and the second end of the diffuser are described as having different diameters. It will be appreciated that the exemplary embodiments are not limited as such. For example, it may be possible for the first end and the second end of the diffuser to have substantially similar diameters as long as the first end and the second end may be provided to matingly engage. In the described exemplary embodiments, the first opening and the second opening of the lens are described as having different diameters. It will be appreciated that the exemplary embodiments are not limited as such. For example, it may be possible for the first opening and the second opening of the lens to have substantially similar diameters as long as the first opening and the second opening may be provided to matingly engage.
• the diffuser is described as being fitted to the lens along an axis A that passes through the center of the diffuser and the lens. It will be appreciated that there can be other forms of fitting the diffuser to the lens.
• the lens may be provided with a lens housing that operates like a flip case, e.g. the lens housing may be capable of being opened around the axis A to reveal the interior of the lens.
• the diffuser may be fitted into the lens housing in a direction along a plane that is perpendicular to the axis A.
• the lens stop member may be provided as a recess or trough with two raised banks within the lens housing and the diffuser stop member may be a flange extending from an outer periphery of the diffuser housing.
• the diffuser stop member may be coupled into the recess of the lens and the lens housing may be closed like a flip case. In this way, the diffuser stop member may provide frictional engagement with the lens stop member.
• the diffuser may rotate with respect to the lens upon application of a force to overcome the frictional engagement between the diffuser and the lens.
• yet another example of the tower signal module may be provided.
• the diffuser may be provided integrated with the lens whereby the diffuser stop member is capable of cooperating with at least one lens stop member to provide frictional engagement between the diffuser and the lens, and the diffuser is capable of rotation with respect to the lens upon application of a force to overcome the frictional engagement between the diffuser and the lens.
• the docking section of a diffuser for receiving a circuit board is described as having a certain configuration for accommodating a certain orientation of the circuit board.
• a guiding edge (compare e.g. 710 of FIGS. 7A and 7B) such that the guiding edge may allow alignment of a flat base of the circuit board (compare e.g. 712 of FIGS. 7A and 7B) comprising an electrical component (compare e.g. 714 of FIGS. 7A and 7B) disposed thereon.
• the exemplary embodiments are not limited as such.
• the docking section may comprise the first substrate and the second substrate to be of any shape and size, and the electrical component may be of any shape or size so long as the corresponding mechanical poka yoke (or error-proofing) design is complementary to the shape and size of the electrical component.

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• 2021
  • 2021-06-29 WO PCT/SG2021/050379 patent/WO2023277784A1/en active Application Filing
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  • 2021-06-29 EP EP21948606.5A patent/EP4179511A4/en active Pending

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