TECHNICAL FIELD
The present disclosure relates to a siren assembly of a vehicle alarm system. More particularly, the present invention relates to a diaphragm assembly for the siren assembly of the vehicle alarm system.
BACKGROUND
A vehicle alarm system (VAS) comprises of a siren assembly generally installed on a vehicle roof. The siren assembly of the vehicle alarm system produces sound signals during occurring of certain uncommon events. The uncommon events include, such as but not limited to, a major shock experienced by the vehicle, an unauthorized access to the vehicle, an unauthorized attempt to open vehicle door or vehicle boot area, and an unauthorized attempt to start the vehicle.
The siren system commonly employs an electric circuitry and a diaphragm assembly. The electric circuitry supplies pluses of electrical signals to the diaphragm assembly. The diaphragm assembly generates sound signals, corresponding to the receipt of the pluses of electrical signals from the electric circuitry. The diaphragm assembly employs a number of components for generation of sound signals, corresponding to the receipt of the pluses of electrical signals from the electric circuitry.
Figure 1 illustrates an exploded view of the currently known diaphragm assembly [100]. Figure 2 illustrates an assembled view of the currently known diaphragm assembly [100]. Figure 1 and figure 2 should be referred to in conjunction, to clearly understand the structure and arrangement of the currently known diaphragm assembly [100]. The currently known diaphragm assembly [100] includes a voice coil diaphragm member [102], a magnet member [104], a pole piece [106], a first washer [108], a second washer [110], a ring member [112], and a plate member [114]. The voice coil diaphragm member [102], the magnet member [104], the pole piece [106], the first washer [108], the second washer

[110], the ring member [112], and the plate member [114] are individual components, suitably arranged together to form the diaphragm assembly [100]. Particularly, the voice coil diaphragm member [102], the magnet member [104], the pole piece [106], the first washer [108], the second washer [110], the ring member [112], and the plate member [114], are attached to each other with use of one or more of screw attachment, rivet attachment, and/ or adhesive attachment, for forming the diaphragm assembly [100].
In assembly of the conventionally known diaphragm assembly [100], the first washer [108] is initially attached to the plate member [114]. Thereafter, the second washer [110] is attached to the first washer [108]. An attachment between the first washer [108] and the plate member [108], and between the second washer [110] and the first washer [108], in facilitated by one of a rivet attachment, a screw attachment, a bolt attachment, and/or a rivet attachment. With such arrangement, a cavity (or mounting space) is formed within the first washer [108] and the second washer [110] and above the plate member [114], to mount and support the magnet member [104] and the pole piece [106]. Thereafter, the ring member [112] is pasted (also referred to as adhesive attachment) below the voice coil diaphragm member [102]. The assembly of the ring member [112] and the voice coil diaphragm member [102] is then mounted on to the assembly of first washer [108], the second washer [110], and the plate member [114], by pasting (also referred to as adhesive attachment) the ring member [112] to the first washer [108]. Usage of adhesive material for such adhesive attachment of the ring member [112] to either of the voice coil diaphragm member [102] and the first washer [108], is not environment friendly. Moreover, such adhesive attachment of the ring member [112] to either of the voice coil diaphragm member [102] and the first washer [108], is relatively weaker and is thus subject to chances of removal when comes in contact with the moisture. Additionally, such adhesive attachment may be subject to removal, during bumpy operations of the vehicle. This may results in dismantling/

disassembly of the diaphragm assembly [100], thereby resulting in operational failure of the vehicle alarm system.
Thus, in view of the above and other drawbacks and limitations of the currently known diaphragm assembly [100], it is essential to develop a system and a method for permanently fixing the ring member [112] and other components together in order to keep the currently known diaphragm assembly [100] operational. The above-mentioned information in the background section is only intended to enhance the understanding of the reader with respect to the field to which the present invention pertains. Therefore, unless explicitly stated otherwise, any of the features or aspects discussed above should not be construed as prior art merely because of its inclusion in this section.
SUMMARY
An object of the present disclosure relates to a diaphragm assembly for a siren assembly of a vehicle alarm system, including a yoke member and a ring member, such that the ring member is attached to the yoke member, with use of a mould attachment.
An object of the present disclosure relates to a diaphragm assembly for a siren assembly of a vehicle alarm system, including a yoke member and a ring member, such that the ring member and the yoke member, are two portions of an integrated singular casted component.
Yet another object of the present disclosure relates to a diaphragm assembly for a siren assembly of a vehicle alarm system, including a yoke member and a ring member, such that the ring member is attached to the yoke member, without use of an adhesive attachment and thereby preventing unwanted dismantling/ disassembly of the diaphragm assembly.
The present disclosure relates to a diaphragm assembly for a siren assembly of a vehicle alarm system. The diaphragm assembly includes a voice coil diaphragm

member, a magnet member, a pole piece, a ring member, and a yoke member. The yoke member defines an open-top cavity and a peripheral top surface. The ring member is attached to the peripheral top surface. The magnet member and the pole piece are positioned within the open-top cavity. The voice coil diaphragm is attached to the top of the ring member, to house the magnet member and the pole piece within the open-top cavity.
BRIEF DESCRIPTION OF DRAWINGS
The present invention, both as to its organization and manner of operation, together with further objects and advantages, may best be understood by reference to the following description, taken in connection with the accompanying drawings. These and other details of the present invention will be described in connection with the accompanying drawings, which are furnished only by way of illustration and not in limitation of the invention, and in which drawings:
Figure 1 illustrates an exploded view of a currently known diaphragm assembly.
Figure 2 illustrates an assembled perspective view of the currently known diaphragm assembly of Figure 1.
Figure 3 shows an exploded view of a siren assembly of a vehicle alarm system, in accordance with the concepts of the present disclosure.
Figure 4 shows an assembled perspective view of the siren assembly of Figure 3, in accordance with the concepts of the present disclosure.
Figure 5 shows an exploded view of a diaphragm assembly of the siren assembly of Figure 3, in accordance with the concepts of the present disclosure.
Figure 6 shows an assembled perspective view of the diaphragm assembly of Figure 5, in accordance with the concepts of the present disclosure.

DETAILED DESCRIPTION
In the following description, for the purposes of explanation, various specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent, however, that embodiments of the present invention may be practiced without these specific details. Several features described hereafter can each be used independently of one another or with any combination of other features. An individual feature may not address any of the problems discussed above or might address only one of the problems discussed above. Some of the problems discussed above might not be fully addressed by any of the features described herein. Example embodiments of the present invention are described below, as illustrated in various drawings in which like reference numerals refer to the same parts throughout the different drawings.
The present invention encompasses systems and methods for providing a siren assembly [300] of the vehicle alarm system.
As used herein, a 'vehicle' refers any kind of transport vehicle used on road that transports people or cargo. Vehicle may include, but are not limited to, cars, trucks, buses, ambulances, two-wheelers, and any other vehicles obvious to a person skilled in the art.
Figure 3 illustrates an exploded view of the siren assembly [300] of a vehicle alarm system, in accordance with the concepts of the present disclosure. Figure 4 shows an assembled perspective view of the siren assembly [300] of the vehicle alarm system, in accordance with the concepts of the present disclosure. Figure 3 and Figure 4 should be referred to in conjunction to clearly understand the scope of the present disclosure. The siren assembly [300] includes an electronic circuit [302], a diaphragm assembly [304], an inner casing [306], an outer casing [308], a propeller [310], a first set of screws [312], a second set of screws [314], a third set of screws [316], a first rubber gasket [318], a second rubber gasket [320], and

a third rubber gasket [322]. Each of the first set of screws first set of screws [312], the second set of screws [314], the third set of screws [316], has an O-ring that helps in restricting any fluid from entering into the siren assembly [300]. In a preferred embodiment, each O-ring is made of, but not limited to, silicon rubber and each set of screws is made up of, but not limited to, mild steel.
The electronic circuit [302] is an electronic control circuit with programmed microcontroller powered by a vehicle battery. The electronic circuit produces electrical signals of defined frequencies in defined sequence, when powered by the vehicle battery. Further, the electrical signals of the defined frequencies in the defined sequence is outputted to the diaphragm assembly [304].
The diaphragm assembly [304] comprises of a transducer (not shown in the figure) that receives the electrical signals from the electronic circuit [302]. Upon receiving the electrical signals from the electronic circuit [302], the diaphragm assembly [304] starts vibrating causing the diaphragm assembly [304] to produce sound signals. Moreover, the frequency and amplitude of the sound signals produced by the diaphragm assembly [304] is dependent on and corresponds to the frequency and sequence of the electrical signals produced by the electronic circuit [302]. The structure and arrangement of the diaphragm assembly [304] will be explained in later in details.
The inner casing [306], the outer casing [308], and the propeller [310], in conjunction with each other, are provided to mount and house the electronic circuit [302] and the diaphragm assembly [304]. Notably, the electronic circuit [302] and the diaphragm assembly [304], are mounted and housed within the inner casing [306], the outer casing [308], and the propeller [310], with use of the first set of screws [312], the second set of screws [314], the third set of screws [316], the first rubber gasket [318], the second rubber gasket [320], and the third rubber gasket [322]. Furthermore, the propeller [310] also enables the sound signals to come out of the diaphragm assembly [304] with increased

amplitude of sound signals. In particular, the sound signal produced by the diaphragm assembly [304] comes out in the surrounding environment through the propeller [310], with relatively increased amplitude of the sound signals.
In assembly of the siren assembly [300], initially, the first rubber gasket [318] and the second rubber gasket [320], in combination, are fitted on bottom of the inner casing [306]. Thereafter, the diaphragm assembly [304] is fixedly attached to the bottom of the inner casing [306], with use of the second set of screws [314]. Although, the diaphragm assembly [304] is shown to be exploded, it may be noted that complete assembly of the diaphragm assembly [304], is attached to the bottom of the inner casing [306]. A structure and arrangement of the diaphragm assembly will be described later in details. Notably, the first rubber gasket [318] and the second rubber gasket [320], in combination fluidly seals an interface between the bottom of the inner casing [306] and the diaphragm assembly [304]. Once the diaphragm assembly [304] is attached to the bottom of the inner casing [306], the electronic circuit [302] is fitted below the diaphragm assembly [304], with use of a spacer [315] there between. Thereafter, an assembly of the inner casing [306], the diaphragm assembly [304] and the electronic circuit [302], is installed inside the outer casing [308], with use of a fourth set of screws (not shown in the figure). Once such assembly of the inner casing [306], the diaphragm assembly [304] and the electronic circuit [302], is installed within the outer casing [308], the resultant assembly is installed on a vehicle body, with use of the third set of screws [316]. While installing the resultant assembly on the vehicle, the third rubber gasket [322] is positioned between an interface between the vehicle body and the outer casing [308], to fluidly seal the outer casing against the vehicle body. In particular, the third rubber gasket prevent entry of fluid within the outer casing [308] of the siren assembly [300]. After installing the resultant assembly on the vehicle body, the propeller [310] is mounted on the inner casing [306] using the first set of screws [312]. The propeller [310] is suitably shaped to increase an amplitude of the

sound signals produced by the diaphragm assembly [304]. Although, the siren assembly [300] components is described to be assembled in the above preferred manner, however, a person having ordinary skilled in the art can easily assemble and arrange these above components in any other manner and such assembly or arrangement is encompassed and covered by the scope of the present disclosure. A structure and arrangement of the diaphragm assembly [304], will now be explained in details hereinafter.
Figure 5 illustrates an exploded view of the diaphragm assembly [304] of the siren assembly [300], in accordance with the concepts of the present disclosure. Figure 6 shows an assembled perspective view of diaphragm assembly [304] of the siren assembly [300], in accordance with the concepts of the present disclosure. Figure 5 and Figure 6 should be referred to in conjunction to clearly understand the scope of the present disclosure. The diaphragm assembly [304] comprises of at least a voice coil diaphragm member [402], a magnet [406] member, a pole piece [404], a ring member [408], and a yoke member [410].
The voice coil diaphragm member [402] is a combination of a diaphragm, a voice coil, and a lead wire (not shown in figure 5). The voice coil diaphragm member [402] generates sound signals corresponding to receipt of the electric signals from the electronic circuit [302] of the siren assembly [300]. In particular, the voice coil diaphragm member [402] is supplied with the electro-magnetic field with use of the magnet member [406] and the pole piece [404]. Additionally, the voice coil diaphragm member [402] also receives the electric signal from the electronic circuit [316] of the siren assembly [300]. Upon receipt of the electrical signals form the electronic circuit [316] of the siren assembly [300], under the effect of the electro-magnetic field form the magnet member [406] and the pole piece [404], the diaphragm of the voice coil diaphragm member [402] is vibrated. Sound signals are produced due to such vibration of the diaphragm of the voice coil diaphragm member [402].

The magnet member [406] and the pole piece [404] are positioned beneath the voice coil diaphragm member, to generate electro-magnetic field in the voice coil diaphragm member [402]. In particular, the magnet member [406] and the pole piece [404] are positioned within the yoke member [410[, to be positioned beneath the voice coil diaphragm member [402]. The magnet member [406] is, but may not be limited to, a neodymium magnet. The pole piece [404] acts as a temporary magnet when the electro-magnetic field is generated.
The ring member [408] is a plastic ring made up of conventionally known polymer materials, such as but not limited to, polypropylene, nylon, polypropene, and the like. The ring member [408] is positioned to be sandwiched between the bottom of the voice coil diaphragm member [402] and the peripheral portion of the yoke member [410].
The yoke member [410] is a support portion of the diaphragm assembly [304]. The yoke member [410] is a substantially U-shaped member, formed in form of an open-top cylindrical container. The yoke member [410] is designed compact and protects the diaphragm assembly [304], from any intrusion of outside water/moisture. In a preferred embodiment, the yoke member [410] is made up of cold rolled close annealed (CRCA). The yoke member [410] defines an open-top cavity [412] and a peripheral top surface [414] thereon. The open-top cavity [412] provides a mounting space to mount and support the magnet member [406] and the pole piece [404], therein. The top surface [414] of the yoke member [410] includes a plurality of grooves/ indentations, to effectively allow attachment of the ring member [408] thereto. In particular, the ring member [408] is attached to the top surface [414] of the yoke member [410]. Also, the yoke member [410] is provided to support the voice coil diaphragm [402], with the ring member [408] sandwiched between the yoke member [410] and the voice coil diaphragm [402]. In particular, the ring member [408] is fixedly attached to the top surface [414] of the yoke member [410] by a molded

attachment, and thus the voice coil diaphragm [402] is fixedly attached to the top of the ring member [408] by a similar molded attachment. The molded attachment between the ring member [408] and the yoke member [410], and between the voice coil diaphragm [402] and the ring member [408] includes, but is not limited to, a hot pressure weld attachment and a cold pressure weld attachment. Although, the ring member [408] and the yoke member [410] are described as separate components combined together by the molded attachment, it may be obvious to a person skilled in the art that the ring member [408] and the yoke member [410] may also be two portions of a single integrated casted component.
In assembly of the diaphragm assembly [304], the ring member [408] is initially fixedly attached to the yoke member [410], by a molded attachment. In particular, the ring member [408] is attached to the top surface [414] of the yoke member [410], by way of either of hot pressure weld attachment or a cold pressure weld attachment. Such molded attachment are relatively more reliable and stronger, thereby providing an effective attachment between the ring member [408] and the yoke member [410]. Moreover, as the top surface [414] of the yoke member [410] is provided with grooves/ indentations, such molded attachment in the current diaphragm assembly [404] are provided relatively more stronger bonds of attachment as compared to the adhesive attachment used in previously known diaphragm assembly [100]. Particularly, the grooves/ indentations on the top surface [414] of the yoke member [410] allows for relatively better flow of molten material, during molded attachment process, thereby ensuring relatively stronger bond/ attachment between the ring member [408] and the yoke member [410]. Additionally, a guide ring is provided on a rear side of the U - yoke [410] for better placement of plastic material within a specified location. Thereafter, the magnet [404] and the pole piece [406] are positioned within the open-top cavity [412] of the yoke member [410]. After such positioning, the voice coil diaphragm [402] is fixedly attached to the top of

the ring member [408], by way of molded attachment. Such molded attachment are relatively more reliable and stronger, thereby providing an effective attachment between the voice coil diaphragm [402] and the ring member [408]. As the attachments between the ring member [408] and the yoke member [410], and between the voice coil diaphragm [402] and the ring member [408], are done by way of molded attachments, a relatively more stringer bond of attachment is attained. Thereby, a relatively reliable and strong assembly is attained in the diaphragm assembly [304] of the present invention, relative to the assembly in the previously known diaphragm assembly [100]. Further, with molding of the ring member [408] with the yoke member [410], all the possibility of water leakage inside the air gap of diaphragm assembly [304] is eliminated. As the ring member [408] is molded with the yoke member [410], the use of adhesive material in fixing the plastic ring [408] with the yoke member [410] is eliminated. This also eliminates the separated fixing of the ring member [408] with the yoke member [410] through the adhesive material. Moreover, the proposed invention is environment friendly as it eliminates the use of the adhesive material.
While the preferred embodiments of the present invention have been described hereinabove, it should be understood that various changes, adaptations, and modifications may be made therein without departing from the spirit of the invention and the scope of the appended claims. It will be obvious to a person skilled in the art that the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive.
List of Components:
100 - Currently Known Diaphragm Assembly 102 - Voice Coil Diaphragm Member of [100]

104 - Magnet Member of [100]
106- Pole Piece of [100]
108-First Washer of [100]
110 - Second Washer of [100]
112 - Ring Member of [100]
114 - Plate Member of [100]
300 - Siren Assembly
302 - Electric Circuit of [300]
304 - Diaphragm Assembly of [300]
306 - Inner Casing of [300]
308 - Outer Casing of [300]
310-Propeller of [300]
312 - First Set of Screws of [300]
314 - Second Set of Screws of [300]
316 - Third Set of Screws of [300]
318 - First Rubber Gasket of [300]
320 - Second Rubber Gasket of [300]
322 - Third Rubber gasket of [300]

We Claim:
1. A diaphragm assembly [304] of a siren assembly, comprising:
a voice coil diaphragm member [402];
a magnet member [404];
a pole piece [406];
a ring member [408]; and
a yoke member [410] defining an open-top cavity [412] and a peripheral top surface [414], wherein
the ring member [408] is attached to the peripheral top surface [414],
the magnet member [404] and the pole piece are positioned within the open-top cavity [412],
the voice coil diaphragm member [402] is attached to the top of ring member [408], to house the magnet member [404] and the pole piece [406] within the open-top cavity [412].
2. The diaphragm assembly [304] as claimed in claim 1, wherein the peripheral top surface [414] of the yoke member [410] defines a plurality of grooves and/ or indentations thereon.
3. The diaphragm assembly [304] as claimed in claim 2, wherein the yoke member [410] is made up of a Cold Rolled Close Annealed (CRCA) Steel material.
4. The diaphragm assembly [304] as claimed in claim 1, wherein an attachment between the ring member [408] and the peripheral top surface [414] of the yoke member is a molded attachment.

5. The diaphragm assembly [304] as claimed in claim 4, wherein the molded attachment includes one of a hot pressure weld attachment and a cold pressure weld attachment.
6. The diaphragm assembly [304] as claimed in claim 1, wherein the ring member [408] and the yoke member [410] are formed as two portions of an integrated component, such that the peripheral top surface [414] is defined at top of the ring member [408].
7. The diaphragm assembly [304] as claimed in claim 1, wherein the voice coil diaphragm member [402] is electrically connected to an electric circuit [302], to receive pulses of electric signals.
8. The diaphragm assembly [304] as claimed in claim 7, wherein the voice coil diaphragm member [402] produces one or more sound signal corresponding to the receipt of the pluses of electric signals from the electric circuit [302].
9. The diaphragm assembly [304] as claimed in claim 8, wherein the frequency of the one or more sound signals produced by the voice coil diaphragm member [402] corresponds to frequency of the pulses of electric signals received from the electric circuit [302].
10. The diaphragm assembly [304] as claimed in claim 1, is used in a siren assembly [300] of a vehicle alarm system.