FIELD OF INVENTION
The present invention relates to the assembly of a vehicle information display
instrument of a vehicle and more particular in providing a sealed structure of the
vehicle information display instrument.
BACKGROUND OF THE INVENTION
The statements in this section merely provide background information related
to the present disclosure and may not constitute prior art(s).
Generally, the automotive vehicles are equipped with various kind of vehicle
information display instruments that are uniquely provided with audio/visual warning
indicators comprising information such as speed, the fuel level, telephone, bluetooth,
rpm of the engine, tell tale symbols, turn signal indicator, hazard warning indicator
and / or other indicators. In particular, a mechanical type vehicle information display
instrument discloses the transmission of the rotation of a wheel of the vehicle or of a
drive component of the transmission as a torsional impulse on a cable. This rotation
of the wheel may be facilitated by a straight type movement or an angular type
movement which becomes a part of a 'Movement Assembly' along with other
components such as numbering wheels, gears, and the like. Various electromechanical
speedometers are also available in the markets with the vie^y of advanced
technologies and reduced cost.
Presently, the vehicle information display instrument is structured of a die cast
two-pieces casing including a front cover casing and a rear cover casing which are
adapted to be detachably secured together along their abutting edges by screws. Thus,
the screwed structure is installed as a unit in a generally rectangular opening provided
in the dash panel of the vehicle. However; the said structure demands more labour
and time for the assembly of the two casings. Additionally, since the two casings are
screwed and hence lack guarantee of a water-proof structure which is importantly
required in. the vehicle information display instrument considering the rainy season
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too. Moreover,.the vehicle information display instrument requires a compact
structure if there are electronic components such as liquid crystal display, light
emitting diodes,and the like are fitted with the vehicle information display instrument.
Therefore, the assembly must be intelligently sealed in order to avoid any mishaps
during and after running of the vehicles.
Hence, there is an urgent need for a well assembled vehicle information
display instrument without losing the basic requirements of reliability, safety, less
cost, customers'satisfaction and the like.
BRIEF SUMMARY AND OBJECTIVES OF THE INVENTION
The present subject matter relates to a vehicle information display instrument
assembly that includes a front cover casing and a rear cover casing permanently
secured to the front cover casing by a silicon based adhesive dispensed by an air
powered dispenser along a continuous slot carved on the edge of the rear casing
portion, wherein the sealed structure is additionally secured by a plurality of snap-fit
locks for sealably joining the front casing portion and the rear casing portion.
' An object of the present subject matter is to provide the vehicle with the fuel
tank, an engine mounted ahead of a rider's seat, brake lights, tail lights, and other
necessary components of the vehicle.
An object of the present subject matter is to provide the fuel tank with a fuel
supply port formed on the upper surface of the fuel tank.
An object of the present subject matter is to structure the front cover casing
and the rear cover casing from a die cast mould. .
Another object of the present subject matter is to seal the front cover casing
with the rear cover casing with the silicon based adhesive such as LOCTITE SI 5900.
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Another object of the present subject matter is to deposit the silicon based
adhesive with the edge of the slot to be no less than 10 microns from the deposition
nozzlp and no more than 2 mm away from it.
Yet another object of the present subject matter is to test the snap-fit locks and
the sealing in the vehicle information display instrument with an IP69K rating test.
Yet another object of the present subject matter is to characterize the
LOCTITE SI 5900 with a rapid skin-over time of 15 min.
Yet another objective of the present subject matter is to held the nozzle of a
test device in the IP69K rating test at a distance of 10 to 15 cm from the vehicle
information display instrument at an angle of 0°, 30°, 60° and 90° for 30 seconds
each.
Yet another objective of the present invention is to provide an easy, compact,
less costly and advanced vehicle information display instrument.
BRIEF DESCRIPTION OF DRAWINGS
The summary narrated above and the following detailed description of the
invention can be understood with the drawings appended to this claim. The
illustrations provide the details of the invention. However, it should be understood
that the invention is not limited to the arrangements shown. In the drawings:
FIG. 1 shows perspective view of a two wheeler in an embodiment of the present
subject matter.
FIG. 2 shows a front perspective view of a vehicle information display instrument of
the vehicle in an embodiment of the present subject matter.
FIG. 3A shows an exploded view of a vehicle information display instrument of the
vehicle in an embodiment of the present subject matter.
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FIG. 3B shows an exploded view of a vehicle information display instrument of the
vehicle showing a front casing portion and a rear casing portion in an embodiment of
the present subject matter.
DETAILED DESCRIPTION OF THE INVENTION
The embodiments of the present subject matter are described in detail with
reference to the accompanying drawings. However, the present subject matter is not
limited to these embodiments which are only provided to explain more clearly the
present subject matter to. the ordinarily skilled in the art of the present disclosure. In
the accompanying drawings, like reference alphabets and numerals are used to
indicate like components. The drawings are not necessarily drawn to the scale, and in
some instances the drawings have been exaggerated and/or simplified in places for
illustrative purposes only.
The present invention relates to the assembly of a vehicle information display
instrument of a vehicle and more particular in providing a sealed structure of the
vehicle information display instrument. The following description is merely
*
exemplary in nature and is not intended to limit the present disclosure, application, or
uses. The present invention will hereinafter be described in detail below as applied to
a motor cycle 100. However, the principles of the present invention are also
applicable to other vehicles such as three wheelers, four wheelers, and the like.
Upward, lower, front and rear directions (see the directions indicated by the arrows in
FIG. 1) will be described with respect, to directions as seated by the rider on the
motorcycle 100.; Further, the present subject matter is explained with reference to a
front casing portion arid a rear casing portion in the vehicle information display
instrument. However, the scope of the present subject matter may be extended to
other structures also in any instrument. .
FIG. 1 illustrates the motor cycle 100 that may include a fuel tank 102 and an
engine mounted ahead of a rider's seat 104, a frame 106 and two relatively large sized
wheels 108 on which the frame 106 rides. The strupture is necessarily provided with a
pair of left and right front fork members fotatably supported by a head pipe 110 on
the front end of the vehicle frame. The steering of the motor cycle 100 is possible via
a front wheel which is mounted on the front fork member whereas the rear wheel
(drive wheel) is at the rear end. FIG. 1 shows a handlebar 112 secured to an upper
portion of the front fork member, and the front and rear portion of the handle bar 112
is covered with a handle cover which is further divided into forward and backward
portions. The motor cycle 100 are also provided with various lights mounted
externally on the vehicle to indicate certain information about the vehicle to other
drivers and pedestrians. These lights mainly include brake lights and tail lights
besides indicator light bulbs which are provided to indicate the driving direction of
the two wheelers. The motor cycle 100 is further provided with the intelligent vehicle
information display instrument (also known as a speedometer) located between the
handle bars 112 of the motor cycle 100. The vehicle information display instrument
114 may be viewable by the rider of the motor cycle 100 when the rider is seated on
the seat 104 and operating the motor cycle 100. The vehicle information display
instrument 114 may be disposed generally in front of the rider so that the rider can
inspect or view a variety of information that form part of the vehicle information
display instrument 114, which information may indicate an operating condition or
conditions of the vehicle. FIG. 1 further shows a headlight 116 provided, as an
attachment to the top middle of the handlebar of the motor cycle, to light the road
ahead.
FIG. 2 discloses a front perspective view of the vehicle information display
instrument 114 provided with a basic outer body onto which a printed circuit board *
(not shown) is assembled supported by the basic body. In an embodiment of the
present subject matter, FIG. 2 shows two adjacent dials (118, 120) located on a
dashboard of the vehicle 100 wherein a first dial 118 indicate the instantaneous
running speed of the vehicle 100 in kilometer per hour (hereinafter may be referred as
KMPH) whereas a second dial 120 may be provided with a liquid crystal panel 122 to
display the cumulative distance of vehicle 100 and the level of the remaining fuel in
the vehicle 100. The second dial 120 may also be provided with audio/visual warning
indicators comprising information such as beam position, side stand position, tell tale
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symbols, turn signal indicator, neutral indicator, engine functioning indicator, hazard
warning indicator and / or other indicators.
In an embodiment of the present subject matter, the vehicle information
display instrument 114 is structured of a die cast two-pieces casing including a front
cover casing 124 and a rear cover casing 126 which are adapted to be permanently
secured together (as shown in FIG. 3B) along their abutting edges by an adhesive
liquid 200 to result in a single structure, as explained later. Thus, the sealed structure
is installed as a unit in a generally rectangular opening provided in the dashboard of
the vehicle 100, as shown in FIG. 3A. The front casing portion 124 has a rectangular
face portion that is provided with a transparent curved glass or plastic insert
providing a viewable window of the indication and other measuring parameters in the
vehicle information display instrument 114. The front casing portion 124 is also
equipped with an integrally formed extending visor (not shown) substantially
surrounding the opening provided on the face of the front casing portion 124 to
prevent glare and avoid viewing discomfort. Additionally, suitable openings for
direction signal indicators and other warning indicators are also provided on the face
of the front casing portion 124.
FIG. 3B shows an exploded view of a vehicle information display instrument
114 of the vehicle 100 showing a front casing portion 124 and a rear casing portion
126 in an embodiment of the present subject matter. In a unique embodiment of the
present subject matter, the front casing portion 124 is attached and thus sealed to the
rear casing portion 126 by the silicone-based adhesive 200. Such silicone-based
adhesives 200 may include such as, but not restricted to, LOCTITE SI 5900 which is
a low strength, moisture-cured, thixotropic silicone-based paste. LOCTITE SI 5900 is
characterized with a rapid skin-over time of 15 min, suitable for gaps up to 1 mm, has
good oil resistance, withstands joint movement, adheres to metal, plastic, glass and
ceramic materials and also reduces migration of liquid after application. In an
exemplary embodiment of the present subject matter, the silicone-based adhesive 200
is applied on a continuous slot 128 carved on the edge of the rear casing portion 126
as shown in FIG. 3B. The silicone-based adhesive 200 is applied on the continuous
slot 128 by an air powered dispenser (not shown) (hereinafter may be referred as a
pneumatic dispenser) specialized in dispensing a controlled amounts of the siliconebased
adhesive 200, in an embodiment of the present subject matter.
In a production environment such as those of manufacturing of vehicle
information display instrument where higher precision may involve reduced process
speed, the rear casing portion and liquid dispensing system may be configured such
that the relative position of the slot 128 with respect to the deposition system is only
required to be within a relatively coarse range. In an exemplary embodiment, a
system may be configured such that the adhesive 200 is deposited with the edge of
the slot 128 to be no less than 10 microns from the deposition nozzle and no more
than 2 mm away from it. This kind of range would be a very easy tolerance for
modern production equipment such as automated liquid deposition system produced
by I&J Fisnar Inc. of New Jersey, USA. This technique is also mostly insensitive to
the angular orientation of the chip with respect to the liquid dispensing system.
In a unique embodiment of the present subject matter, the front cover casing
and the rear cover casing are sealed with each other to form a non-detachable
structure wherein the structure is additionally secured by a plurality of snap-fit locks
130, as shown in FIG. 3A for sealably joining the front casing portion 124 and the
rear casing portion 126. These snap-fit locks 130 advantageously facilitate an
intelligent and secured sealing of the front casing portion 124 and the second casing
portion 126. In other words, the front casing portion 124 is placed on the rear casing
portion 126 once the rear casing portion 126 is dispensed with the silicone-based
adhesives 200 (LOCTITE SI 5900), subsequent to which the snap-fit locks 130 allow
and thus permanently secure the front cover casing 124 and the rear cover casing 126
together. In another embodiment of the present subject matter, these locks 130 and
the sealing of the integrated structure (of the vehicle information display instrument)
is afterward tested with a IP69K rating test to ensure the ability of vehicle
information display instrument 114 to resist ingress of dust, high temperature (steam)
and high water pressure. The IP69K rating test specifies a spray nozzle fed of water
with an approximate temperature of 80 degree Celsius, a pressure of 80 to 100 bar
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and a flow rate of 14 to !6 L/mu, Operationally, the nozzle of a test device in the
IP69K rating test is held at a distance of 10 to 15 cm from the vehicle information
chsplay mstrument at an angle of 0°, 30°, 60° and 90° for 30 seconds each Further
the testing vehicle information display instrument 114 is placed on a turn-able table
that rotates once every 12 seconds. Hence, the IP69K rating tes, confirms the strengm
abmty, and durability of the integrated structure of the vehicle information display'
instrument 114. '
The vehicle information display instrument assembled according to the
present subject matter advantageously facilitates a robust and sealed structure of the
vehicle information display instrument 114 for the vehicles 100. Further since the
front cover/casing 124 is sealed to the rear cover casing 126 in a manner that the two
parts are almost inseparable, hence there are remote chances of intrusion of dust
moisture or any other external elements. Additionally, since LOCTITE SI 5900 is
characterized with a rapid skin-over time of 15 min, suitable for gaps up to 1 mm, has
good oil resistance, withstands joint movement, adheres to metal, plastic, glass and
ceramic materials and also reduces migration of liquid after application, therefore the
sealing is remarkably unparalleled. Furthermore, since the attachment of the front
cover casing 124 and the rear cover casing 126 discriminates the application of nuts,
screws, and the like, hence the possibilities of any wear and tear also gets reduced
Also, the overall cost involved for the present subject matter is also low. Again the
present subject matter ensures least requirement of servicing and maintenance that
subsequently lowers the overall cost of any vehicle information display instruments
114 for vehicles 100. Moreover, the present subject matter discloses an improved
advanced, reliable, and customers' friendly vehicle information display instrument
114.
It will be appreciated by those skilled in the art that changes could be made to
the embodiments described above without departing from the broad inventive concept
thereof. The present embodiments are therefore to be considered in all respects as
illustrative and not restrictive, the scope of the invention being indicated by the
appended claims rather than by the foregoing description and all variations •
substitutions and changes which come within the meaning and range of equivalency
of the claims are therefore intended to be embraced therein.
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WE CLAIM:
1. A vehicle information display instrument 114 assembly comprising:
a front cover casing 124;
a rear cover casing 126 permanently secured to the front cover casing 124 by
a silicon based adhesive 200 dispensed by an air powered dispenser along a
continuous slot 128 carved on the edge of the rear casing portion 126, wherein
the sealed structure is additionally secured by a plurality of snap-fit locks 130
for sealably joining the front casing portion 124 and the rear casing portion
126.
2. The vehicle information display instrument 114 assembly as claimed in claim 1,
wherein the front cover casing 124 and the rear cover casing 126 are structured
of a die cast mould.
3. The vehicle information display instrument 114 assembly as claimed in claim 1,
wherein the silicone-based adhesives 200 may include such as, but not restricted
to, LOCTITE SI 5900.
4. The vehicle information display instrument 114 assembly as claimed in claim 1,
wherein the silicon based adhesive 200 is deposited with the edge of the
continuous slot 128 to be no less than 10 microns from the deposition nozzle and
no more than 2 mm away from it.
5. The vehicle information display instrument 114 assembly as claimed in claim 1,
wherein snap-fit locks 118 and the sealing in the vehicle information display
instrument 114 is tested with a IP69K rating test.
6. The vehicle information display instrument 114 assembly as claimed in claim 1,
wherein the IP69K rating test specifies a spray nozzle fed of water with an
approximate temperature of 80 degree Celsius, a pressure of 80 to 100 bar and a
flow rate of 14 to 16 L/min on the vehicle information display instrument.
The vehicle information display instrument 114 assembly as claimed in claim 1,
wherein the IP69K rating test confirms the strength, ability, and durability of the
integrated structure of the vehicle information display instrument 114.
The vehicle information display instrument 114 assembly as claimed in claim 1,
wherein the LOCTITE SI 5900 is characterized with a rapid skin-over time of 15
min.
The vehicle information display instrument 114 assembly as claimed in claim 1,
wherein the nozzle of a test device in the IP69K rating test is held at a distance of
10 to 15 cm from the vehicle information display instrument at an angle of 0°,
30°, 60° and 90° for 30 seconds each.
The vehicle information display instrument assembly 114 as claimed in claim 1,
wherein the silicon based adhesive such as LOCTITE SI 5900 is also suitable for
metal, plastic, glass and ceramic materials.