WO2008072805A1

WO2008072805A1 - Bracket for solenoid valve

Info

Publication number: WO2008072805A1
Application number: PCT/KR2006/005458
Authority: WO
Inventors: Jong-Dae Lim; Jin-Woo Lee
Original assignee: Inzi Controls Co., Ltd.
Priority date: 2006-12-14
Filing date: 2006-12-14
Publication date: 2008-06-19

Abstract

A bracket attaching the solenoid valve (S) to a vibrating element, the bracket includes a planar support portion 52, a pair of side walls 54 and 54', a planar shield portion 56, a planar overlap portion 58 and 58', and a bolt 60. The planar support portion 52 supports a bottom of the solenoid valve (S). The side walls 54 and 54' bending and extending from both ends of the support portion 52, respectively, is parallel with each other and surrounds both sides of the solenoid valve (S). The planar shield portion 56 bends and extends from a front end formed on at least one side wall 54 of the side walls 54 and 54', and shields one side of the solenoid valve (S) exposed between the side walls 54 and 54'. The planar overlap portion 58 and 58' overlaps an outside of the shield portion 56 located at an opposite side to the solenoid valve (S). The bolt 60 sequentially goes through the shield portion 56 and the overlap portion 58 and 58' and then is practically screwed into the vibrating element with a head 60a being hung and fixed by the shield portion 56. Since the overlap portion 58 and 58' contacts and overlaps the shield portion 56, the shield portion 56 is reinforced and vibration transmitted to the shield portion 56 is damped. Therefore, the present invention relates to a vibration-proof bracket.

Description

Description BRACKET FOR SOLENOID VALVE

Technical Field

[1] The present invention relates to a bracket for a solenoid valve, and more particularly, to a vibration-proof bracket for a solenoid valve connecting the solenoid valve to a vibrating element. Background Art

[2] A solenoid valve is broadly used. Especially, the solenoid valve is used in vibrating vehicles. The solenoid valve is connected to a vibrating element through a bracket. Referring to FIG. 1, a solenoid valve (S) for a vehicle is used in an intake system of a vibrating engine. The solenoid valve (S) is mounted on an intake manifold 1 vibrated by the engine (E).

[3] The intake system of the engine (E) illustrated in FIG. 1 provides a fuel-air mixture through the intake manifold 1 attached to the engine (E). A diaphragm actuator 2 rotates a valve disk Ia to control (supply or cut off) compressed air. The diaphragm actuator 2 is formed at a side of the intake manifold 1. The compressed air is carried to the engine (E) through the intake manifold 1. The valve disk Ia is built in the intake manifold 1.

[4] The actuator 2 is operated by the solenoid valve (S) connected to an air supply unit

3 and a vacuum tank 4. When vacuum pressure of the vacuum tank 4 from the solenoid valve (S) is transmitted to the actuator 2, a rod (2a) is contracted as illustrated in solid lines. The rod 2a pulls a rink 2b coupled to a shaft of the valve disk Ia, so that the shaft of the valve disk Ia is rotated. When ambient pressure of the air supply unit 3 from the solenoid valve (S) is transmitted to the actuator 2, the rod (2a) pushes the rink 2b, so that the shaft of the valve disk Ia is reversely rotated as illustrated in phantom lines. Therefore, the rink 2b is eccentrically rotated by the actuator 2, so that the valve disk Ia is opened and closed.

[5] The solenoid valve (S) is attached to a mounting angle (M) of the intake manifold 1 using a bracket 10 illustrated in an enlarged view. As illustrated in the enlarged view, a bolt 20 is screwed into the mounting angle (M) through the bracket 10, so that the solenoid valve (S) is attached to the mounting angle (M) in a single unit.

[6] As illustrated in FIG. 2, the bracket 10 is attached to the mounting angle (M), the bracket surrounding the solenoid valve (S). As illustrated in a below enlarged view, the bracket 10 includes a support portion 11, both side walls 12 and 12', and shield portions 13 and 13' in a single element. The support portion 11 supports a bottom of the solenoid valve (S). The both side walls 12 and 12' extend from the both ends of the support portion 11 in parallel to surround the both sides of the solenoid valve (S). In addition, a bending hook 12a is formed at an upper portion of the bracket 10. The bending hook 12a bends, so that the solenoid valve (S) can be hooked and thus the bending hook 12a is fixed at the solenoid valve (S) in a single unit. The shield portions 13 and 13' extend from a front end of the both side walls 12 and 12' with ends of the shield portions 13 and 13' facing each other to shield a side of the solenoid valve (S), respectively. That is, the shield portions 13 and 13' are divided into two bodies, not a body.

[7] Meanwhile, the bolt 20 screwed into the mounting angle (M) is also screwed into a nut 22 through the ends of the shield portions 13 and 13' facing each other as illustrated in an enlarged view. The bolt 20 has a plurality of weld protrusions (WP) on its head 20a. The weld protrusions (WP) are spot welded to the shield portions 13 and 13' of the bracket 10. Spot points (SP) are illustrated in dotted lines on the shield portions 13 and 13', to which the weld protrusions (WP) are spot welded. That is, the weld protrusions (WP) are melted down at the spot points (SP) by spot welding. Therefore, the weld protrusions (WP) are spot welded, so that the head 20a of the bolt 20 is attached to the shield portions 13 and 13'.

[8] Meanwhile, for the bracket 10, physical properties of the shield portions 13 and 13' near the spot points (SP) are weakened by thermal stress caused by spot welding. Especially, brittleness of the shield portions 13 and 13' is increased. Therefore, a reinforcement ring (R) is attached to the shield portions 13 and 13' of the bracket 10.

[9] After the head 20a of the bolt 20 is attached to the shield portions 13 and 13', the reinforcement ring (R) is attached to the shield portions 13 and 13' by a brazing process, surrounding the head 20a. Therefore, the shield portions 13 and 13' near the spot points (SP) are reinforced by the reinforcement ring (R). That is, the shield portions 13 and 13' are reinforced by the reinforcement ring (R).

[10] As illustrated in the enlarged view in FIG. 1, the conventional bracket 10 is attached to the mounting angle (M) by the bolt 20, surrounding the solenoid valve (S). The mounting angle (M) is attached to the intake manifold 1 in a cantilever-type configuration by angle bolts (B). Therefore, the bracket 10 is attached to the mounting angle (M), so that the solenoid valve (S) is attached to the vibrating intake manifold.

[11] However, for the conventional bracket 10 illustrated in the enlarged view in FIG. 2, the shield portions 13 and 13' contacting the mounting angle (M) are divided into the two bodies, so that gap (G) is formed in the ends of the shield portions 13 and 13' facing each other. Therefore, the strength of the shield portions 13 and 13' is weakened by the gap (G). Resonance may occur on the ends of the shield portions 13 and 13' facing each other. The resonance is caused by vibration transmitted along the intake manifold 1. In addition, the strength of the shield portions 13 and 13' is more weakened by fatigue caused by the resonance, so that a crack may occur in the shield portions 13 and 13'.

[12] Further, when the bolt 20 is spot welded to the shield portions 13 and 13', the ends of the shield portions 13 and 13' near the gap (G) are largely weakened by the thermal stress. When the shield portions 13 and 13' are formed in a body without the gap (G), the ends of the shield portions 13 and 13' are connected to each other and supported, so that the shield portions 13 and 13' are not largely weakened by the thermal stress. However, the ends of the shield portions 13 and 13' are not connected to each other, so that the ends of the shield portions 13 and 13' near the gap (G) are largely weakened by the thermal stress.

[13] Although the ends of the shield portions 13 and 13' are reinforced by the reinforcement ring (R), the brazing process for attaching the reinforcement ring (R) increases manufacturing costs.

[14] In addition, when the ends of the shield portions 13 and 13' bend, the ends of the shield portions 13 and 13' may be not aligned with each other, so that flushness (ΔH) occurs illustrated in the enlarged view in FIG. 2. Therefore, a portion of the shield portions 13 and 13' does not contact the mounting angle (M). That is, a portion of the shield portions 13 and 13' has a predetermined distance from the mounting angle (M).

[15] Since a portion of the shield portions 13 and 13' has a predetermined distance from the mounting angle (M), the shield portions 13 and 13' are excessively resonated by vibration of the engine (E) transmitted to the mounting angle (M) along the intake manifold 1. Especially, since the mounting angle (M) is attached to the intake manifold 1 in a cantilever- type configuration, the shield portions 13 and 13' are more excessively resonated. Since the shield portions 13 and 13' have the flushness (ΔH) to have a predetermined distance from the mounting angle (M), the resonance is increased. Therefore, the strength of the shield portions 13 and 13' is weakened by the resonance, so that lifetime of the shield portions 13 and 13' is shortened. In addition, the lifetime of the shield portions 13 and 13' is shortened by a crack.

[16] In conclusion, the ends of the shield portions 13 and 13' facing each other are not aligned with each other, so that the flushness (ΔH) occurs. The excessive resonance occurs because of the flushness (ΔH). The strength of the shield portions 13 and 13' is largely weakened by the resonance. As a matter of course, the flushness (ΔH) occurs since the ends of the shield portions 13 and 13' bend, not aligning with each other. However, it is practically impossible to exactly bend the ends of the shield portions 13 and 13' uniformly mass produced by machines. Disclosure of Invention Technical Problem [17] An object of the present invention is to provide a bracket for a solenoid valve of an intake manifold forming a portion in a single unit and with an overlap portion, so that gap and flushness can be removed and the strength of the portion is reinforced. The portion practically contacts a vibrating element. The gap and the flushness are formed in the portion.

[18] Another object of the present invention is to provide a bracket for a solenoid valve of an intake manifold forming a portion in a single element and with an overlap portion, so that the strength of the portion is reinforced. The portion practically contacts a vibrating element. Technical Solution

[19] To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, there is provided a bracket attaching the solenoid valve to a vibrating element, the bracket including a planar sup port portion supporting a bottom of the solenoid valve, a pair of side walls bending and extending from both ends of the support portion, respectively, the side walls being parallel with each other and surrounding both sides of the solenoid valve, a planar shield portion bending and extending from a front end formed on at least one side wall of the side walls, the planar shield portion shielding one side of the solenoid valve exposed between the side walls, a planar overlap portion overlapping an outside of the shield portion located at an opposite side to the solenoid valve, and a bolt sequentially going through the shield portion and the overlap portion and then practically screwed into the vibrating element with a head being hung and fixed by the shield portion.

[20] The shield portion may bend from the front end formed at one of the side walls and extend to the other side wall, the shield portion 56 having an area covering one side of the solenoid valve and a single element structure for increasing strength.

[21] The shield portion may include a first shield portion bending and extending from one side wall of the side walls and having a length for preventing the head of the bolt from being placed on an end of the first shield portion, and a second shield portion bending and extending from the other side wall of the side walls and separated from the first shield portion with an end of the second shield portion facing the end of the first shield portion.

[22] The overlap portion may bend and extend from the other side wall located at an opposite side to the side wall including the shield portion, and the overlap portion may have an area corresponding to the shield portion and contact and overlap the shield portion.

[23] The overlap portion may separated from the side walls and have an area corresponding to an area of the shield portion, and the overlap portion may overlap the shield portion and practically contacts the vibrating element. [24] The bracket may further include a coupling member coupling the shield portion to the overlap portion. [25] The coupling member may include an adhesive material applied to an interface between the shield portion and the overlap portion, so that the shield portion is bonded to the overlap portion. [26] The coupling member may be a welded part for permanently coupling the shield portion to the overlap portion. [27] The coupling member may include holding protrusions extending from an upper portion of the overlap portion and bending toward the shield portion for holding the shield portion.

Brief Description of the Drawings [28] FIG. 1 is a schematic view illustrating a structure for a conventional engine intake system;

[29] FIG. 2 is a perspective view illustrating the solenoid valve illustrated in FIG. 1 ;

[30] FIG. 3 is a perspective view illustrating a bracket according to a first embodiment of the present invention; [31] FIG. 4 is a perspective view illustrating a bracket according to a second embodiment of the present invention; and [32] FIG. 5 is a perspective view illustrating a bracket according to a third embodiment of the present invention.

Best Mode for Carrying Out the Invention [33] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 3 is a perspective view illustrating a bracket according to a first embodiment of the present invention. A vibrating element is described using a conventional intake manifold. [34] As illustrated in FIG. 3, the bracket according to a first embodiment of the present invention includes a support portion 52; a pair of side walls 54 and 54'; a shield portion

56; an overlap portion 58; and a bolt 60. [35] In detail, the support portion 52 is a flat plate. As illustrated in an additional view in an upper left portion, the support portion 52 formed under a solenoid valve (S), supports a bottom of the solenoid valve (S). [36] The side walls 54 and 54' bend perpendicular to both ends of the support portion 52 and are extended from the both ends of the support portion 52, respectively. Therefore, the couple of side walls 54 and 54' are formed in parallel. As illustrated in the additional view in the upper left portion, the side walls 54 and 54' surround both sides of the solenoid valve (S). A bending hook 54a is formed at an upper portion of the side walls 54 and 54'. The bending hook 54a bends, so that the solenoid valve (S) can be hooked and thus the bending hook 54a is fixed at the solenoid valve (S) in a single unit. As a matter of course, the bracket according to a first embodiment of the present invention is attached to the solenoid valve (S) using the side walls 54 and 54'.

[37] The shield portion 56 bends and extends from a front end formed at one 54 of the side walls 54 and 54'. The shield portion 56 bends perpendicular to the other side wall 54' and is long in length, almost reaching the side wall 54'. In addition, the shield portion 56 has an area corresponding to one side of the solenoid valve (S) exposed between the side walls 54 and 54' to shield the one side of the solenoid valve (S).

[38] The shield portion 56 is not divided and has a single element structure. Therefore, the strength of the shield portion 56 is not weakened because of the structure.

[39] The overlap portion 58 bends and extends from a front end formed at the other side wall 54'. The overlap portion 58 bends perpendicular to the opposite side wall 54 and has an area corresponding to the shield portion 56. The overlap portion 58 bends perpendicular to the opposite side wall 54 to closely overlap with the shield portion 56. Therefore, the overlap portion 58 and the shield portion 56 are reinforced by supporting each other.

[40] Meanwhile, the overlap portion 58 has the same shape with the shield portion 56.

Therefore, the overlap portion 58 has a single element structure.

[41] The bolt 60 sequentially goes through the shield portion 56 and the overlap portion

58 and then the bolt 60 is attached to a mounting angle (M). The mounting angle (M) is attached to the intake manifold illustrated in FIG. 1 using bolts (B). A head 60a of the bolt 60 is fixed by the shield portion 56. The bolt 60 can be screwed into a nut (N). That is, the bolt 60 can be attached to the mounting angle (M) using the nut (N). Therefore, the bracket according to a first embodiment of the present invention is practically connected to the vibrating intake manifold. As a matter of course, the bracket is connected to the intake manifold, including the solenoid valve (S) as illustrated in the additional view in the upper left portion.

[42] Meanwhile, the overlap portion 58 contacts the mounting angle (M) using the bolt

60 as illustrated in the additional view (plan view of the bracket) in the upper right portion. The overlap portion 58 absolutely contacts the mounting angle (M) without a portion of the overlap portion 58 departing from the mounting angle (M). Especially, the overlap portion 58 is not divided to have no flushness (ΔH) illustrated in FIG. 2. Therefore, the overlap portion 58 absolutely contacts the mounting angle (M).

[43] Meanwhile, the head 60a of the bolt 60 can be permanently fixed to the shield portion 56. In order to permanently fix the head 60a, a plurality of weld protrusions is formed on the head 60a and then the head 60a is spot welded into the shield portion 56. Therefore, the head 60a is permanently fixed to the shield portion 56 by melting the weld protrusions (WP).

[44] The weld protrusions (WP) are spot welded to spot points (SP). The bracket according to a first embodiment of the present invention has thermal stress when the bolt 60 is spot welded to the shield portion 56. The thermal stress is dispersed over the shield portion 56 formed of a single element, so that the shield portion 56 can strongly resist the thermal stress. Therefore, the shield portion 56 has a predetermined strength to strongly resist vibration and prevent a crack.

[45] In addition, the overlap portion 58 contacting the shield portion 56 reinforces the shield portion 56 and prevents a crack since the overlap portion 58 contacts and supports the shield portion 56 and damps vibration transmitted to the shield portion 56 from the mounting angle (M). That is, the overlap portion 58 is a kind of damper. Therefore, the shield portion 56 is protected from vibration.

[46] The vibration is caused by the intake manifold along the mounting angle (M).

[47] The bracket according to a first embodiment of the present invention needs to further include a coupling member coupling the shield portion 56 with the overlap portion 58. The coupling member couples the shield portion 56 with the overlap portion 58 to reinforce the shield portion 56 and the overlap portion 58. That is, the shield portion 56 and the overlap portion 58 are reinforced by the coupling member.

[48] For example, the coupling member can be constructed to use adhesive material. The adhesive material is applied on an interface between the shield portion 56 and the overlap portion 58, so that the shield portion 56 can be coupled to the overlap portion 58. The adhesive material can firmly bond a metal to another metal. Especially, the adhesive material may be rapidly cured by ultra violet radiation.

[49] In addition, the coupling member can be constructed to weld the shield portion 56 to the overlap portion 58, so that the shield portion 56 can be permanently couple to the overlap portion 58. The welding may be spot welding or brazing. In order to spot weld the shield portion 56 to the overlap portion 58, weld protrusions should be present on the shield portion 56 or the overlap portion 58. However, the shield portion 56 or the overlap portion 58 formed by press forming are difficult to have the weld protrusions, so that the brazing is preferred. When the shield portion 56 is coupled to the overlap portion 58 using the brazing, a powdered binder metal such as brass should be placed between the shield portion 56 and the overlap portion 58.

[50] After adhesive material is applied on the shield portion 56 or the overlap portion 58, the powdered binder metal is sprayed to be placed between the shield portion 56 and the overlap portion 58. Therefore, the powdered binder metal is placed on a surface of the shield portion 56 or the overlap portion 58 by the adhesive material. A flash point of the adhesive material is even lower than that of the powdered binder metal, so that the adhesive material can be ignited earlier than the powdered binder metal in an atmosphere furnace. The adhesive material is completely burned in the high- temperature atmosphere furnace, so that the powdered binder metal can firmly couple the shield portion 56 to the overlap portion 58. That is, the adhesive material is completely burned, so that the powdered binder metal can couple the shield portion 56 to the overlap portion 58 without interference of the adhesive material.

[51] The coupling member may be constructed to have holding protrusions 58a illustrated in FIG. 4. The holding protrusions 58a will be described with reference to FIG. 4. FIG. 4 is a perspective view illustrating a bracket according to a second em bodiment of the present invention. The bracket according to the second embodiment of the present invention includes the holding protrusions 58a formed on the bracket according to the first embodiment of the present invention. Therefore, only properties of the bracket according to the second embodiment of the present invention will now be described.

[52] As illustrated in FIG. 4, the holding protrusions 58a extend from an upper portion of the overlap portion 58. As illustrated in an enlarged view, the holding protrusions 58a bend toward the shield portion 56 to hold the shield portion 56 with the overlap portion 58. That is, the shield portion 56 is locked by the holding protrusions 58a, contacting the overlap portion 58. Therefore, the shield portion 56 is coupled to the overlap portion 58 in a single unit.

[53] FIG. 5 is a perspective view illustrating a bracket according to a third embodiment of the present invention. The bracket according to the third embodiment of the present invention includes a shield portion 56 and an overlap portion 58' different from those of the bracket according to the first embodiment of the present invention. The bracket according to the third embodiment of the present invention will now be described with reference to FIG. 5.

[54] As illustrated in FIG. 5, the bracket according to the third embodiment of the present invention includes the shield portion 56. The shield portion 56 includes a first and second shield portions 56-1 and 56-2, respectively. In addition, the overlap portion 58' is separated from side walls 54 and 54'.

[55] The first shield portion 56-1 bends and extends from one 54 of the side walls 54 and

54'. The first shield portion 56-1 is long in length, being near the other side wall 54' as illustrated in an enlarged view. A bolt 60 goes through a center of the first shield portion 56-1. Therefore, a head 60a of the bolt 60 is not placed on an end of the first shield portion 56-1. That is, a boundary surface of the head 60a does not cross the end of the first shield portion 56-1.

[56] Meanwhile, the second shield portion 56-2 bends and extends from the other 54' of the side walls 54 and 54', being separated from the first shield portion 56-1 as illustrated in the enlarged view. An end of the second shield portion 56-2 faces the end of the first shield portion 56-1. The shield portion 56 is practically a single element.

[57] Meanwhile, the overlap portion 58' is interposed between the shield portion 56 and a mounting angle (M). The bolt 60 is screwed into the mounting angle (M), so that the overlap portion 58' overlaps the shield portion 56 as illustrated in the enlarged view. The overlap portion 58' has an area corresponding to an area of the shield portion 56. The overlap portion 58' contacts the mounting angle (M) as illustrated in the enlarged view. That is, the mounting angle (M) is interposed between the overlap portion 58' and a vibrating element.

[58] Flanges 58b surrounding ends of the side walls 54 and 54' may be formed on ends of the overlap portion 58'. The overlap portion 58' more firmly supports the shield portion 56 using the flanges 58b.

[59] The overlap portion 58' can be bonded or attached to the shield portion 56 by the coupling member described above. That is, the overlap portion 58' can be coupled to the shield portion 56 by an adhesive material or welding.

[60] In addition, the overlap portion 58' can be coupled to the shield portion 56 by the holding protrusions 58a illustrated in FIG. 4. As a matter of course, the holding protrusions 58a should be formed on the overlap portion 58' for the overlap portion 58' to be coupled to the shield portion 56 by the holding protrusions 58a.

[61] For the bracket according to the third embodiment of the present invention, the divided shield portion 56 is weak. However, the additional overlap portion 58' surrounds the first and second shield portions 56-1 and 56-2 in a single unit, so that the bracket is reinforced and protected from vibration.

[62] In addition, the bracket according to the third embodiment of the present invention includes the overlap portion 58' absolutely contacting the mounting angle (M) as illustrated in the enlarged view. That is, the overlap portion 58' absolutely contacts the mounting angle (M) without a portion of the overlap portion 58' departing from the mounting angle (M). Although vibration is transmitted, resonance is not increased. That is, there is no excessive resonance.

[63] The brackets according to the embodiments of the present invention may be coupled to a vibrating element. That is, the bracket according to the first embodiment of the present invention may be directly coupled to the intake manifold without the mounting angle (M). Industrial Applicability

[64] A bracket for a solenoid valve according to the present invention, the bracket includes a shield portion. Since the shield portion is practically a single element, the shield portion is reinforced and has no crack caused by resonance. In addition, thermal stress is dispersed, so that the shield portion has a predetermined strength. The thermal stress is generated by spot welding. [65] In addition, an overlap portion is formed outside the shield portion, so that the shield portion is more reinforced and vibration is damped. The vibration is transmitted to the shield portion. [66] In addition, since the shield portion is more reinforced, a conventional brazing process can be omitted, for attaching a reinforcement ring. [67] In addition, since the overlap portion has no flushness, resonance is not increased, and the generation of a crack is more effectively prevented. [68] In addition, when the shield portion is coupled to the overlap portion using a coupling member, the shield portion is more reinforced. [69] While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims.

Claims

[1] A bracket for attaching a solenoid valve (S) to a vibrating element, the bracket comprising: a planar support portion 52 supporting a bottom of the solenoid valve (S); a pair of side walls 54 and 54' bending and extending from both ends of the support portion 52, respectively, the side walls 54 and 54'being parallel with each other and surrounding both sides of the solenoid valve (S); a planar shield portion 56 bending and extending from a front end formed on at least one of the side walls 54 and 54', the planar shield portion 56 shielding one side of the solenoid valve (S) exposed between the side walls 54 and 54'; a planar overlap portion 58 and 58' overlapping an outside of the shield portion 56 located at an opposite side to the solenoid valve (S); and a bolt 60 sequentially going through the shield portion 56 and the overlap portion 58 and 58' and then practically screwed into the vibrating element with a head 60a being hung and fixed by the shield portion 56.

[2] The bracket of claim 1, wherein the shield portion 56 bends from the front end formed at one of the side walls 54 and 54' and extends to the other side wall 54', the shield portion 56 having an area covering one side of the solenoid valve (S) and a single element structure for increasing strength.

[3] The bracket of claim 1, wherein the shield portion 56 comprises: a first shield portion 56-1 bending and extending from one side wall 54 of the side walls 54 and 54' and having a length for preventing the head 60a of the bolt

60 from being placed on an end of the first shield portion 56-1; and a second shield portion 56-2 bending and extending from the other side wall 54' of the side walls 54 and 54' and separated from the first shield portion 56-1 with an end of the second shield portion 56-2 facing the end of the first shield portion

56-1.

[4] The bracket of claim 1, wherein the overlap portion 58 bends and extends from the other side wall 54' located at an opposite side to the side wall 54 including the shield portion 56, and the overlap portion 58 has an area corresponding to the shield portion 56 and contacts and overlaps the shield portion 56.

[5] The bracket of claim 1, wherein the overlap portion 58' is separated from the side walls 54 and 54' and has an area corresponding to an area of the shield portion 56, and the overlap portion 58' overlaps the shield portion 56 and practically contacts the vibrating element.

[6] The bracket of any one of claims 1 through 5, further comprising a coupling member coupling the shield portion 56 to the overlap portion 58 and 58'.

[7] The bracket of claim 6, wherein the coupling member comprises an adhesive material applied to an interface between the shield portion 56 and the overlap portion 58 and 58', so that the shield portion 56 is bonded to the overlap portion 58 and 58'.

[8] The bracket of claim 6, wherein the coupling member is a welded part for permanently coupling the shield portion 56 tothe overlap portion 58 and 58'.

[9] The bracket of claim 6, wherein the coupling member comprises holding protrusions 58a extending from an upper portion of the overlap portion 58 and 58' and bending toward the shield portion 56 for holding the shield portion 56.