Claims:We claim,
1. A compact rotary type side stand switch assembly (100) for mounting on two wheeler vehicle side stand (132) that is a safety assembly which switches off the vehicle engine when side stand (132) is retracted,
characterized in that,
the rotary type side stand switch assembly (100) comprises of an upper housing (116) made of plastic having a compartment for positioning a magnet (110); a shunt plate (106), a lower housing (102) with a compartment for PCB assembly (108); a bush (105);a Delrin bush (104) and a mud flap (103);
the PCB assembly (108) has an Integrated circuit with a Hall sensor and other electronic parts such that the hall sensor senses the change in the magnetic flux generated by the magnet (110);
the PCB assembly (108) and magnet (110) are fixed in the assembly (100) by epoxy potting and wiring harness (118) with the PCB assembly (108) is potted along with harness sleeve in lower housing (102);
the shunt plate (106) made of mild steel, is placed in the lower housing (102) and upper housing (116) and the shunt plate (106) is the rotating part that is actuated by the vehicle side stand (124);
the side stand switch assembly (100) is electrically configured to the engine control unit (ECU) of the vehicle so that the starting operation of the vehicle can be controlled on the basis of the position of the side stand switch assembly (100);
and
the side stand switch assembly (100) uses shunt plate(106) to actuate the hall sensor in the PCB assembly (108) which will give high switching accuracy from ON position to OFF position.

2. The side stand switch assembly as claimed in claim 1, wherein the metal bush (105) is present in the slot on the lower housing (102), it is press fit in the Delrin bush (104) and functions to take the tightening load of the side stand switch when the housing of the assembly (100) is mounted on the side stand.

3. The side stand switch assembly as claimed in claim 1, wherein when the side stand (132) is a non-retracted position, that is in a horizontal up position, the shunt plate (106) is in front of the magnet (110) and the PCB assembly (108) and in this position, the magnetic flux of the magnet (110) does not reach the Hall Sensor in the PCB assembly (108) and the signal is low that signals the vehicle engine to remain ON.

4. The side stand switch assembly as claimed in claim 1, wherein when the side stand (132) begins to retract, the side stand (124) moves down to an angle of approximately 30 degrees and the shunt plate (106) starts to move away from the magnet (110) and the PCB assembly (108) with the sensor and the engine cut off range starts.

5. The side stand switch assembly as claimed in claim 1, wherein when the side stand (124) is fully retracted and the vehicle is parked, the rotation of the shunt plate (106) and the shunt plate (106) goes away from the magnet (110) and the PCB assembly (108) with the sensor and the magnet (110) and the sensor in the PCB assembly (108) are facing each other, which is a high signal and the high signal reaches the ECU and the vehicle engine will remain off.
, Description:FIELD OF INVENTION
The present invention relates to a side stand switch assembly and more particularly relates to a compact , more reliable ,cost effective and light weight switch assembly to be mounted on two-wheeler side stands. The Side stand switch is a safety assembly which prevents the start of the vehicle when side stand is pushed down i.e., the vehicle is in parking position.
BACKGROUND OF THE INVENTION
Many times, people forget to kick back the side stand to the normal position while driving two wheelers due to which accident may occur as the side stand hit on the road .While taking turning curve which may cause to the death or serious injuries to the rider. However, this design has high cost. The following types of side stand switches in market.
A)Mechanical contact type side stand switch – In this design there are two contacts ,one is fixed & other is moving and this switch is require perfect sealing for water entry ,which is a bigger challenge and reliability under water ,mud & dust is an issue & may lead to failures ( Functioning of switch is from OFF position to ON position )
B)Reed switch with permanent Magnet type side stand switch – In this design reed switch is mounted on the plate of side stand and magnet is mounted on stand . This assembly in two parts & switching range is not accurate . Reed switch type of sensor manufacturing is challenging & need lot of care for Reed switch handling (Functioning of switch is from OFF position to ON position)
C) Hall sensor with permanent Magnet type side stand sensor – In this design Magnet is moving & hall sensor is fixed in the housing , In this design when the side stand goes from Up to Down the OFF to ON transition angle is not accurate .
US patent application no, 2009/0066057 A1 discloses mechanical contact type switches that are prone to failure, having less life span and are comparatively costly owing to the fact that it comprises more number of components and also mounting scheme is complex. Hence, it is desired to provide a system that can sense the entire unsafe zone of the side stand and which is of non-contact type.
A Japanese patent no 2016-255306 –
In this design working principle is Hall sensor and Magnet type of design ,where hall sensor is fixed & Magnet is moving and switching of hall sensor is based on the change of the magnetic flux . In this design when the side stand goes from Up to Down the OFF to ON transition angle is not accurate.
A Indian patent no WO2021/199064-A1-
In this design working principle is Hall sensor and Magnet type of design ,where hall sensor is fixed & Magnet is moving and switching of hall sensor is based on the change of the magnetic flux . In this design when the side stand goes from Up to Down the OFF to ON transition angle is not accurate and also in this design sealing is mandatory to avoid any dust particle to enter inside the housing
OBJECT OF THE INVENTION
A primary object of the present invention is to provide a side stand switch assembly which is compact, lightweight , reliable, cost effective and having the shunt plate integrated in the housing of the side stand switch assembly.
Another object of the present invention is to provide a side stand switch assembly which is rotary type and can be mounted on the presently available vehicles without any changes required by the vehicle user side.
Another object of the present invention is to provide a side stand switch assembly which is highly reliable and has robust design so that the side stand switch assembly is rigid, sealed and has no impact of external abuses in field.
Another object of the invention is to provide a side stand switch assembly that uses shunt plate to actuate the hall sensor which will give high switching accuracy from ON position to OFF position.

SUMMARY OF THE INVENTION
Before the present invention is described, it is to be understood that present invention is not limited to particular methodologies and materials described, as these may vary as per the person skilled in the art. It is also to be understood that the terminology used in the description is for the purpose of describing the particular embodiments only, and is not intended to limit the scope of the present invention.
According to an aspect of the invention, a compact rotary type side stand switch assembly for mounting on two wheeler vehicle side stand that is a safety assembly which switches off the vehicle engine when side stand is retracted is described. The rotary type side stand switch assembly comprises of an upper housing made of plastic having a compartment for positioning a magnet and a compartment for a PCB assembly; a shunt plate made of mild steel, a lower or upper housing made of plastic; and a metal bush with plastic sleeve.
According to another aspect of the invention, the PCB assembly has an Integrated circuit with a Hall sensor and other electronic parts such that the hall sensor senses the change in the magnetic flux generated by the magnet. The PCB assembly and magnet are fixed in the assembly by epoxy potting and wiring harness and connector 3 pole are attached to the PCB assembly by epoxy coating and are sealed.
According to another aspect of the invention the shunt plate made of mild steel, is a rotating part assembled inside the upper and lower housing. The shunt plate & bush are the rotating parts and the upper and lower housing are the fixed part. The shunt plate pin is projected out from lower housing which guides in the vehicle stand and enables the rotation of shunt plate when the vehicle side stand moves up and down. When the side stand is retracted and is down, the shunt plate goes away from magnet and sensor at this position. The side stand assembly is electrically configured to the engine control unit ( ECU ) of the vehicle and that will be co-related with the side stand position. Up position of the side stand means vehicle will start and Down position of the side stand means vehicle will not start.

BRIEF DESCRIPTION OF THE DRAWINGS
A complete understanding of the present invention may be made by reference to the following detailed description which is to be taken in conjugation with the accompanying drawing. The accompanying drawing, which is incorporated into and constitutes a part of the specification, illustrates one or more embodiments of the present invention and, together with the detailed description, it serves to explain the principles and implementations of the invention.
FIG.1 is the top perspective view of the side stand switch assembly according to an embodiment of the invention;
FIG.2 is the bottom perspective view of the side stand switch assembly according to an embodiment of the invention;
FIG.3 is the front perspective view of the side stand switch assembly according to an embodiment of the invention
FIG.4 is the exploded view of the side stand switch assembly as shown in FIG. 1 according to an embodiment of the invention; and
FIG.5A-C are the perspective views of the stages of working of the side stand switch assembly as shown in FIG. 1 according to an embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
Before the present invention is described, it is to be understood that this invention is not limited to particular methodologies described, as these may vary as per the person skilled in the art. It is also to be understood that the terminology used in the description is for the purpose of describing the particular embodiments only, and is not intended to limit the scope of the present invention. Throughout this specification, the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps. The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the invention to achieve one or more of the desired objects or results.
LIST OF REFERENCE NUMERALS:

Sr. No. Description of the part
100 Side stand switch assembly
102 lower housing
103 mud flap
104 Delrin bush
105 bush
106 Shunt plate
108 PCB assembly
110 Magnet
112 Rubber seal
116 Upper housing
118 Wire harness
120 Connector 3 pole
122 Vehicle stand mounting plate
124 Vehicle side stand

The present invention describes a compact, more reliable, cost effective and light weight switch assembly to be mounted on two-wheeler vehicle side stands. The side stand switch is a safety assembly which prevents the start of the vehicle when side stand is pushed down i.e., when the vehicle is in parking position. Typically, side stand switch is mounted on the side stand rod of the vehicle integrated with side stand plate. The Side stand switch is mounted in front or back side of the side stand depending on the requirements. The side stand switch assembly is electrically configured to the engine control unit of the vehicle so that the starting operation of the vehicle can be controlled on the basis of the position of the side stand switch. The side stand switch is generally mounted in the vicinity of the side stand enabling the side stand switch to receive the position of the side stand and then send the received data of the position of the side stand to the engine control unit (ECU) and the ECU sends the signal to the vehicle engine.
According to an embodiment of the present invention, a cost effective, integrated rotary type side stand switch assembly is described. According to FIG. 1 and 2 of the present invention, the top view and the bottom view of the side stand switch assembly (100) are described. FIG. 3 describes the front view of the side stand switch assembly (100). The side stand switch assembly (100) comprises of an upper housing (116) made of plastic having a compartment(holder) for positioning a magnet (110) with a rubber seal (112); a PCB assembly (108); a shunt plate (106), a lower housing (102) made of plastic; a bush (105); a Delrin bush (104) and a mud flap (103) to control mud entry.
According to FIG. 4 of the present invention, an exploded view of the side stand switch assembly (100) is described. The upper housing (116) consists of a slot for positioning the magnet (110) and the lower housing (102) has a slot to position the PCB assembly (108). The magnet (110) and the PCB assembly (108) are fixed parts of the assembly (100). The PCB assembly (108) has an Integrated circuit with a Hall sensor and other electronic parts. The hall sensor senses the change in the magnetic flux generated by the magnet (110).The magnetic flux by the magnet (110) is sensed by the Hall sensor in the PCB assembly (108). Potting is done in the PCB assembly (108) and wiring harness (118) and connector 3 pole (120) are attached to the PCB by epoxy coating and are sealed. The wiring harness (118) with the PCB assembly (108) is potted along with harness sleeve in lower housing (102).The wiring harness is connected to the vehicle engine to signal the start and stop of the engine.
According to the embodiment of the invention, the lower housing (102) has the shunt plate (106) and a mud flap (103). The shunt plate (106) is made of mild steel and is the plate between lower housing (102) and the upper housing (116). The shunt plate (106) and the bush (105) are the rotating parts and the housings (102, 116) are the fixed parts. The shunt plate (106) pin is projected out from lower housing (102) which guides in the vehicle side stand (124) and enables the rotation of shunt plate (106) when the side stand (124) moves up and down. The rotating shunt plate (106) allows for a non-contact type switching mechanism to signal the sensor in the PCB assembly (108). The shunt plate (106) of the assembly (100) moves in a rotary movement when it is actuated by the vehicle side stand (132) that has an angular movement that guides the shunt plate (106) in the side stand hole. The metal bush (105) is present in the slot on the lower housing, it is press fit in the Delrin bush (104) and functions to take the tightening load of the side stand switch when the housing of the assembly (100) is mounted on the side stand. A gasket is optionally placed between the lower housing (102) and the upper housing (116) for sealing and preventing moisture, water, dust, mud or air to enter in the assembly. Although, the gasket can optionally be deleted in the present assembly as there is no sealing requirement between the lower and upper housing.
According to an embodiment of the invention, the side stand switch assembly (100) is assembled in the following manner. The PCB assembly (108) with the wire harness (118) is inserted in the lower housing (102) and then potting is done. The magnet (110) is inserted in the upper housing (116) and then potting is done. The mud flap (103) and the shunt plate (106) are then inserted in the lower housing (102). The upper housing (116) and the lower housing (102) are then locked together to form a subassembly and Delrin bush (104) is inserted in this subassembly. In this subassembly, the metal bush (105) and the mudflap (103) are inserted to complete the side stand switch assembly.
According to the FIGs. 5A to 5C of the present invention, the working of the side stand switch assembly is described. The side stand switch assembly (100) is mounted on the vehicle stand mounting plate (122) and is also attached to the vehicle side stand (124). It can be mounted on the front or back of the vehicle side stand (124). The side stand switch assembly is mounted with the help of nuts and bolts.
According to the embodiment of the present invention, as shown in FIG. 5A, when the side stand (124) is in a horizontal position, meaning the vehicle is in drive mode, the side stand switch assembly (100) is OFF and the engine is ON. At this position, the shunt plate (106) is in front of the magnet (110) and the PCB assembly (108). In this position, the magnetic flux of the magnet (110) does not reach the Hall Sensor in the PCB assembly (108). In this position, the output voltage and signal is low. This signals the vehicle engine to remain ON and therefore the side stand switch is not switched ON and the engine remains in the ON condition.
According to the embodiment of the present invention, as shown in FIG. 5B, when the vehicle comes to a halt and the side stand needs to be retracted , the side stand (124) is in between the up and down condition at some angle- approximately 30 degrees depending on customer requirement. This rotation movement of the side stand (124) actuates the rotating of the shunt plate (106) and it starts to move away from the magnet (110) and the PCB assembly (108) with the sensor and the engine cut off range starts.
According to the embodiment of the present invention, as shown in FIG. 5C, when the side stand is fully retracted and the vehicle is parked, the rotation of the shunt plate (106) and the shunt plate (106) is completely away from the magnet (110) and the PCB assembly (108) with the sensor. The magnet (110) and the sensor in the PCB assembly (108) are facing each other, which is a high signal and the high signal reaches the ECU and the Side stand switch assembly(100) remains on, which leads to keeping the vehicle engine off.
According to the embodiment of the invention, the shunt plate (106) gives a sure signal to the ECU with excellent accuracy and the position of the switching off can be controlled by the shunt plate design. The side stand switch assembly (100) uses shunt plate(106) to actuate the hall sensor in the PCB assembly (108) which will give high switching accuracy from ON position to OFF position. Using shunt plate has an advantage over the conventional available designs.
It will be obvious to those skilled in the art that many variations may be made in the embodiment herein chosen for the purpose of illustrating the present invention, and for result may be had to the doctrine of equivalence without departing from the scope of the present invention as defined by the appended claims.
While considerable emphasis has been placed herein on the specific elements of the preferred embodiment, it will be appreciated that many alterations can be made and that many modifications can be made in preferred embodiment without departing from the principles of the invention. These and other changes in the preferred embodiments of the invention will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.