JPH0721040Y2 - Strong sound generator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a strong sound generator used as a sound source of a large sound pressure load facility.

[Conventional technology]

FIG. 4 shows a sectional view of a conventional strong sound generator. Fixed structures 2 and 3 are provided inside the casing 1.
A permanent magnet 4, a fixed portion 19 and a cone 5 are mounted on the fixed structure 2. An annular structure 6 is fixed to the casing 1 so as to face the cone 5. A filter 8 is provided between the air inlet 7 and the fixed structure 2. The fixed structures 2 and 3 each have a plurality of air passages 9 and 9 '(eg 8
It is provided). An air outlet 10 is provided between the cone 5 and the annular structure 6.

The casing 1, the fixed structure 2, the fixed structure 3, and the fixed portion 19 are made of a magnetic material. The lines of magnetic force due to the action of the permanent magnet 4 are formed in the above member. Therefore, a pair of magnetic poles N and S as shown in FIG. 5, for example, are formed on the outer circumference of the fixed portion 19 and the inner circumference of the fixed structure 3 with a gap therebetween. The magnetic poles may be the reverse of the above. In short, a radial magnetic field is formed in the annular gap between the members 19 and 3.

Details of the electromagnetic valve indicated by the symbol A in FIG. 4 are shown in FIG. A slit is formed between the cone 5 and the annular structure 6.
A cylindrical static valve 12 having 11 is fixed. The slit has a shape extending in the circumferential direction of the static valve and is provided in a plurality of rows. A cylindrical dynamic valve 14 having a slit 13 is elastically supported on a mounting portion 16 provided on the fixed structure 3.
It is attached through 15. The slit 13 is provided in the moving valve in the same shape and arrangement as the slit 11 of the static valve. The dynamic valve shares a center line with the static valve, and is supported by the elastic support mechanism 15 in a state of being fitted to the static valve with a gap of μm unit between the static valve and the static valve. A drive coil 17 wound in the circumferential direction of the dynamic valve 14 is attached to the lower end of the dynamic valve 14. A pair of magnetic poles is formed by the action of the magnet 4 on the end faces of the inner and outer fixed parts of the valve that sandwich the drive coil 17 at the lower end of the same moving valve.

In this device, compressed air is blown from the air inlet 7, and in the electromagnetic valve of the portion A in the middle of the path through which air advances inside along the white arrow and is discharged to the air outlet 10, an alternating current is applied to the coil. Flow and vibrate the dynamic valve in the direction of the center line of the static valve by the action of mutual magnetic force, and intermittently discharges the compressed air according to the opening and closing of the slits caused by the mutual positional relationship of both valves to generate a strong sound. It is what makes me.

As shown in FIG. 5, this electromagnetic valve faces each other with the slits 11 and 13 half-opened when the dynamic valve 14 is in the initial setting state (neutral position). The valve is closed when the moving valve 14 moves upward by a half slit width, and is opened when the moving valve moves downward by a half slit width.
The moving valve is moved by an oscillating motion due to the mutual magnetic force between the magnet 4 and the drive coil 17.

Another example of a conventional electromagnetic valve is shown in FIG. A static valve 12 having a slit 11 is fixed between the cone 5 and the annular structure 6. The upper end of the static valve 12 is a mounting portion 16 extended upward as compared with a conventional static valve, and the upper end of a dynamic valve 14 having a slit 13 at that portion is an elastic support mechanism 15.
It is attached through. A drive coil 17 is attached to the lower end of the dynamic valve 14. The configuration other than the above is the fifth
It is the same as the figure. The action and effect of generating a strong sound are almost the same as those shown in FIG.

Yet another example is shown in FIG. As the elastic support mechanism 15, a coil spring is installed by interposing it between the mounting portion 18 below the drive coil 17 at the bottom of the moving valve 14 and the mounting portion 16 provided on the fixed portion 19 on the same side as the static valve 12. There is.

[Problems to be solved by the invention]

(1) In the electromagnetic valve shown in FIG. 5, a dynamic valve,
The determination of the center position of the static valve requires accuracy in the unit of μm, but since the mounting parts of the dynamic and static valves are distant from each other, mutual positioning work was extremely difficult.

(2) Further, in the electromagnetic valve shown in FIG. 6, since the support position of the elastic support mechanism on the moving valve side is away from the point of application of the exciting force to the moving valve, that is, the drive coil portion, There was a drawback that the movement of was unstable.

(3) Further, in the case of FIG. 7, the stationary valve side fixing portion 19 is magnetized, so that it is very difficult to disassemble and assemble at the time of maintenance or moving valve replacement.

[Means for solving problems]

The present invention solves the above-mentioned problems of the prior art, and includes a static valve mounting seat provided on a fixed portion, a cylindrical static valve mounted on the static valve mounting seat, and extending in the circumferential direction of the static valve. A plurality of rows of slits having a shape and provided in the static valve, the center line being shared by the static valve and being fitted to the static valve with a gap of μm unit between the center line and the static valve. Of a cylindrical dynamic valve supported by an elastic support mechanism so that it can vibrate in the direction, a slit provided in the dynamic valve in the same shape and arrangement as the slit of the static valve, and compressed air that can pass through the slit portions of both valves. A flow path, a pair of magnetic poles facing each other at positions sandwiching one end of the moving valve, respectively, provided on inner and outer fixed parts of the same moving valve, and a circumferential direction of the same moving valve at the one end of the moving valve. To A coil wound in the same direction as the circumferential direction of the same moving valve is provided on the magnetic pole portion of the wound coil or the opposite side of the one end of the moving valve, and a current is passed through the coil to move the moving valve by the action of mutual magnetic force. While vibrating in the direction of the center line of the valve, the compressed air is supplied to the flow path, and the compressed air is intermittently discharged according to the opening and closing of the slits caused by the mutual positional relationship between the valves, thereby generating a strong sound. In the sound generator, a dynamic valve mounting seat made of a non-magnetic material is provided adjacent to the static valve mounting seat and brazed, and one end of the elastic support mechanism is connected to the dynamic valve mounting seat and the other end is connected to the static valve mounting seat. The present invention relates to a strong acoustic generator characterized in that the dynamic valve is connected in close proximity to a portion sandwiched between the pair of magnetic poles and elastically supports the dynamic valve.

[Action]

By providing the dynamic valve mounting seat by brazing the static valve mounting seat only adjacent to the static valve mounting seat, mutual positioning is facilitated and the dynamic / static valve can be mounted in the casing after pre-assembly. Further, as the positioning accuracy is improved, the assembling / disassembling work becomes easy.

Since the elastic support mechanism is attached close to the portion of the dynamic valve that is sandwiched between the pair of magnetic poles, that is, the point of action of the electromagnetic excitation force, the dynamic valve movement is stable.

Since the dynamic valve mounting seat is made of a non-magnetic material, it does not magnetize, so it is easy to disassemble and assemble during maintenance or when replacing the dynamic valve.

〔Example〕

FIG. 1 shows a sectional view of an embodiment of the present invention. In the figure, the parts having the same functions as those of the conventional technique shown in FIG.
Further, the driving principle of the dynamic valve 14 is the same as the conventional technique. The difference between the present embodiment and the prior art is the portion indicated by the symbol B in the drawing. This will be described with reference to FIG.

FIG. 2 is an enlarged view of a portion indicated by reference numeral B in FIG. In the figure, 20 is a mounting seat for the static valve 12, which is provided below the cone 5. Reference numeral 21 is a mounting seat for the dynamic valve 14 provided adjacent to the static valve mounting seat 20, which is made of a non-magnetic material such as SUS304 or resin, and maintains a normal positional relationship between the dynamic valve and the static valve. In order to make it easier, the joint between the static valve mounting seat and the static valve mounting seat is indicated by reference numeral C by brazing. Reference numeral 15 denotes an elastic support mechanism for attaching the dynamic valve 14 to the dynamic valve mounting seat 21, which has a shape of a leaf spring or the like made of rubber, metal, resin or the like. It is attached in proximity to the drive coil 17, that is, the portion between the pair of magnetic poles, that is, the point of action of the electromagnetic excitation force.

In this embodiment, (1) the mounting seats of the dynamic valve and the static valve are adjacent to each other, and
Since the joints are made with an anchor, the positioning accuracy between the moving and static valves is improved, and disassembly and assembly are easy.

(2) Since the elastic support mechanism is mounted close to the drive coil of the moving valve sandwiched between the pair of magnetic poles, that is, the point of action of the electromagnetic exciting force, the movement of the moving valve is stable. .

(3) Since the mounting seat of the elastic support mechanism is made of a non-magnetic material and is not magnetized, it can be easily disassembled and assembled at the time of maintenance or replacement of the dynamic valve.

FIG. 3 shows another embodiment. The mounting seat and the elastic support mechanism are the same as those in the above-mentioned embodiment. The difference is the drive unit. twenty two
Is an induction motor type drive coil, which is provided on the inner circumference of the fixed structure 3 provided on the casing 1 side, on the magnetic pole portion on the opposite side of the lower end of the moving valve 14, and is the same as the circumferential direction of the moving valve. It is wound in the direction. Further, the dynamic valve 14 is made of a conductor so as to enable generation of an induced current. In this device, when an alternating current is passed through the drive coil 22, an induced current is generated in the circumferential direction of the lower portion of the moving valve 14, and this current crosses the magnetic field formed between the fixed portion 19 and the fixed structure 3. Therefore, the dynamic valve 14 vibrates due to this interaction. In this example, the drive coil 22 is provided on the inner circumference of the fixed structure 3, but it may be replaced with a coil wound in the circumferential direction on the outer circumference of the fixed portion 19. In the present embodiment, the point of action of the electromagnetic exciting force on the moving valve is the portion of the moving valve facing the coil, or in other words, the portion sandwiched between a pair of magnetic poles. . The elastic support mechanism is mounted close to this part. The operation and effect of this embodiment are the same as those of the previous embodiment.

[Effect of device]

Since the dynamic valve mounting seat is adjacent to the static valve mounting seat and is brazed to each other, the positioning accuracy between the dynamic and static valves is improved, and the disassembling and assembling work is facilitated.

Further, since the elastic support mechanism is attached in proximity to the portion of the moving valve that is sandwiched between the pair of magnetic poles, that is, the point of action of the electromagnetic exciting force, the movement of the moving valve is stable.

In addition, the dynamic valve mounting seat is made of non-magnetic material, so it is easy to disassemble and assemble.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a partial sectional view of the above embodiment, FIG. 3 is a sectional view of another embodiment of the present invention, and FIGS. It is sectional drawing of a prior art. 1 ... Casing 2 ... Fixed structure 3 ... Fixed structure 4 ... Magnet 5 ... Cone 6 ... Annular structure 7 ... Air inlet 8 ... Filter 9,9 '... Air passage 10 ... Air outlet 11 …… Slit 12 …… Static valve 13 …… Slit 14 …… Dynamic valve 15 …… Elastic support mechanism 16 …… Mounting part 17 …… Drive coil 18 …… Mounting part 19 …… Fixing part 20 …… Static Valve mounting seat 21 …… Dynamic valve mounting seat 22 …… Induction motor type drive coil

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Akio Higashida 1-1-1 Wadazaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Inventor Tsutomu Yamaguchi Kazu, Hyogo-ku, Kobe-shi, Hyogo 1-1-1 Tasakicho Mitsubishi Heavy Industries Ltd. Kobe Shipyard

Claims (1)

[Scope of utility model registration request] 1. A static valve mounting seat provided on a fixed portion, a cylindrical static valve mounted on the static valve mounting seat, and a static valve having a shape extending in a circumferential direction of the static valve, provided on the static valve. A plurality of rows of slits share the center line with the static valve and are fitted to the static valve with a gap of μm unit between them and supported by an elastic support mechanism so as to vibrate in the direction of the center line. Cylindrical dynamic valve, slits provided in the dynamic valve in the same shape and arrangement as the slits of the static valve, compressed air flow paths that can pass through the slit portions of both valves, positions that sandwich one end of the dynamic valve. A pair of magnetic poles facing each other at the inner and outer fixed parts of the same valve, and a coil wound in the circumferential direction of the same valve at the one end of the same or the one end of the same. of A coil wound in the same direction as the circumferential direction of the same-moving valve is provided on the magnetic pole portion on the opposite side, and a current is passed through the coil to vibrate the moving valve in the direction of the center line of the static valve by mutual magnetic force action. In a strong acoustic generator that supplies compressed air to a flow path and intermittently releases compressed air according to the opening and closing of the slits caused by the mutual positional relationship of both valves to generate a strong sound, in the static valve mounting seat Adjacent to each other, a dynamic valve mounting seat made of non-magnetic material bonded by brazing is provided, one end of the elastic support mechanism is connected to the dynamic valve mounting seat, and the other end is sandwiched between the pair of magnetic poles of the dynamic valve. A strong acoustic generator characterized in that it is connected close to the existing part and elastically supports the same valve.