Ultrasonic cleaner and water stop gasket

Abstract

To provide an ultrasonic cleaner capable of easily securing a vibration frequency of an ultrasonic horn.SOLUTION: An ultrasonic cleaner 1 comprises an ultrasonic horn 11, a horn cover 12, and a holder 14. The ultrasonic horn 11 includes an ultrasonic vibrator 11A and a horn body 11B. The ultrasonic vibrator 11A vibrates at an ultrasonic frequency in response to a driving signal. The horn body 11B extends in an axial direction from a base 11C toward a tip 11D, and has the ultrasonic vibrator 11A incorporated in the base 11C. The tip 11D vibrates along with the vibration of the ultrasonic vibrator 11A. The horn cover 12 covers, seen from the axial direction, the ultrasonic horn 11 over the entire region of a peripheral direction Y around the center axis Ax of the horn body 11B. The holder 14 holds a part of the base 11C with the horn cover 12 in the axial direction, and is fixed to the horn cover 12 to hold the base 11C.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to an ultrasonic cleaner and a watertight gasket. [Background technology]

[0002] Conventionally, ultrasonic cleaners that remove dirt from clothes by vibrating an ultrasonic horn are known. Patent Document 1 discloses a configuration in which a flange formed at the base of the ultrasonic horn is held on both sides in the axial direction by a silicone packing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] China Patent Application Publication No. 105755728 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the configuration described in Patent Document 1, the ultrasonic horn is not positioned sufficiently, and there is a concern that the tip of the ultrasonic horn may interfere with the housing during use of the ultrasonic cleaner. In addition, since the configuration involves placing a packing over the flange of the ultrasonic horn, there is also the issue that the manufacturing procedure is complicated.

[0005] The present invention has been made in consideration of the above problems, and an object of the present invention is to provide an ultrasonic cleaner that can hold an ultrasonic horn simply and reliably. [Means for solving the problem]

[0006] The ultrasonic cleaner according to the present disclosure includes an ultrasonic horn, a horn cover, and a holder. The ultrasonic horn has an ultrasonic vibrator and a horn body. The ultrasonic vibrator vibrates at an ultrasonic frequency in accordance with a drive signal. The horn body extends in the axial direction from a base to a tip, and the ultrasonic vibrator is built into the base, and the tip vibrates in response to vibration of the ultrasonic vibrator. The horn cover covers the ultrasonic horn over the entire circumferential area around the central axis of the horn body when viewed from the axial direction. The holder holds a portion of the base together with the horn cover in the axial direction, and is fixed to the horn cover to hold the base. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide an ultrasonic cleaner that easily and reliably holds an ultrasonic horn. [Brief description of the drawings]

[0008] [Figure 1] 1 is an external view of an ultrasonic cleaner according to a first embodiment of the present disclosure. [Diagram 2] 2 is a diagram showing a state in which a cap is removed from the ultrasonic cleaner shown in FIG. 1. FIG. [Diagram 3] 3 is a bottom view of the ultrasonic cleaner shown in FIG. 2. [Figure 4] FIG. 3 is a plan view of the ultrasonic cleaner shown in FIG. 2. [Diagram 5] 5 is a cross-sectional view taken along line VV of the ultrasonic cleaner shown in FIG. 4. [Figure 6] FIG. 6 is an external view of the horn body shown in FIG. 5. [Figure 7] FIG. 6 is an exploded perspective view of a main part of the ultrasonic cleaner shown in FIG. [Figure 8] FIG. 8 is a cross-sectional view of the exploded perspective view shown in FIG. [Figure 9A] FIG. 8 is a perspective view of the watertight gasket shown in FIG. [Figure 9B] FIG. 8 is a front view of the watertight gasket shown in FIG. [Figure 10]FIG. 6 is an enlarged view of a main part of the ultrasonic cleaner shown in FIG. 5. [Figure 11] 1 is an enlarged view of a main portion of a cross section taken along line XI-XI of FIG. [Figure 12] 4 is an enlarged view of a main portion of a cross section taken along line XII-XII in FIG. 3. [Figure 13] 2 is a circuit diagram showing a drive circuit of the ultrasonic cleaner shown in FIG. 1. [Figure 14A] FIG. 11 is a perspective view of a watertight gasket according to a second embodiment. [Figure 14B] FIG. 11 is a plan view of a watertight gasket according to a second embodiment. [Figure 14C] FIG. 11 is another perspective view of the watertight gasket according to the second embodiment. [Figure 15] 11 is an enlarged longitudinal sectional view of a main portion of an ultrasonic cleaner according to a second embodiment of the present disclosure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to Figures 1 to 15. In the drawings, the same or corresponding parts are designated by the same reference characters and description thereof will not be repeated.

[0010] [First embodiment] The configuration of an ultrasonic cleaner 1 according to the first embodiment will be described. The ultrasonic cleaner 1 is a tool used to remove dirt attached to an object to be cleaned, such as clothes, by vibration. Fig. 1 is an external view of the ultrasonic cleaner 1 according to the first embodiment.

[0011] (1) Overall structure As shown in Fig. 1, the ultrasonic cleaner 1 includes a main body 10 and a main body cap 20. The main body 10 is rod-shaped with a rectangular cross section. The main body 10 has rounded corners in a cross section perpendicular to the central axis Ax. The main body cap 20 covers one end of the main body 10.

[0012] Fig. 2 is a diagram showing a state in which the body cap 20 is removed from the ultrasonic cleaner 1 shown in Fig. 1. Fig. 3 is a bottom view of the ultrasonic cleaner 1. As shown in Figs. 2 and 3, the main body 10 includes a body cover 10A, a bottom cover 10B, a push button switch 10C, a power supply unit 10D, an ultrasonic horn 11, a horn cover 12, and a horn cap 13.

[0013] (1-1) Structure of the main body 10 The body cover 10A is a member that constitutes the outer shape of the main body 10. A bottom cover 10B is attached to one end of the body cover 10A. The bottom cover 10B closes one end of the body cover 10A.

[0014] A push button switch 10C is disposed in the center of the bottom cover 10B. A power supply unit 10D is provided on the bottom cover 10B outside the push button switch 10C. The power supply unit 10D is used for power supply and battery charging. When the power supply unit 10D is used for contactless power supply, it can be disposed inside the main body 10.

[0015] (1-2) Structure of ultrasonic horn 11 Fig. 4 is a plan view of ultrasonic cleaner 1. Fig. 5 is a cross-sectional view taken along line VV of ultrasonic cleaner 1 shown in Fig. 4. As shown in Figs. 4 and 5, ultrasonic horn 11 includes ultrasonic transducer 11A and horn body 11B. Ultrasonic transducer 11A vibrates at an ultrasonic frequency in response to a drive signal. Ultrasonic transducer 11A is built into horn body 11B.

[0016] Horn body 11B is a member extending along central axis Ax from base 11C to tip 11D. Ultrasonic transducer 11A is built into base 11C of horn body 11B. Horn body 11B vibrates in accordance with the vibration of ultrasonic transducer 11A.

[0017] In the following description, the direction in which central axis Ax of horn body 11B extends is referred to as "axial direction Z." For ease of description, the tip side of horn body 11B in axial direction Z as viewed from main body 10 is referred to as the "tip side in axial direction Z," and the opposite side is referred to as the "bottom side in axial direction Z." A direction perpendicular to axial direction Z is referred to as "radial direction X." A direction going around central axis Ax in a plan view as viewed from axial direction Z (hereinafter simply referred to as plan view) is referred to as "circumferential direction Y."

[0018] Fig. 6 is an external view of horn body 11B. As shown in Fig. 6, tip portion 11D of horn body 11B has a flat rectangular shape with long and short sides in a plan view. In the following description, the direction along the long side of horn body 11B in radial direction X is referred to as "long side direction X1". Also, the direction along the short side of horn body 11B in radial direction X is referred to as "short side direction X2".

[0019] Horn body 11B has a circular cross section on the bottom side in axial direction Z. Horn body 11B is configured so that the cross section gradually becomes flatter and rectangular from base portion 11C to tip portion 11D.

[0020] Base portion 11C of horn body 11B includes housing portion 11E, flange portion 11F, and connecting portion 11G. Housing portion 11E, flange portion 11F, and connecting portion 11G are integrally formed with tip portion 11D from a metal material.

[0021] The housing portion 11E has a cylindrical shape and houses therein the ultrasonic transducer 11A (see FIG. 5).

[0022] The flange portion 11F extends outward in the radial direction X from the end of the housing portion 11E on the tip side in the axial direction Z. The flange portion 11F forms part of the base portion 11C. The flange portion 11F is formed around the entire circumference of the horn body 11B. The flange portion 11F has a generally rectangular shape in plan view. The corners of the flange portion 11F in plan view are chamfered. Therefore, the flange portion 11F has an octagonal shape in plan view.

[0023] The connecting portion 11G is connected to the tip side of the flange portion 11F in the axial direction Z. The connecting portion 11G has a truncated cone shape. The connecting portion 11G connects the flange portion 11F and the tip portion 11D of the horn body 11B.

[0024] (1-3) Structure of the horn cover 12 Fig. 7 is an exploded perspective view of the main parts of the ultrasonic cleaner 1. Fig. 8 is a cross-sectional view of the exploded perspective view shown in Fig. 7. As shown in Fig. 7 and Fig. 8, the horn cover 12 is a member that covers the entire circumference of the ultrasonic horn 11 from the outside in the radial direction X. The horn cover 12 is disposed coaxially with the ultrasonic horn 11.

[0025] The horn cover 12 has a cylindrical shape with a top. The horn cover 12 has an opening 12A. The opening 12A is disposed in the center of the top of the horn cover 12.

[0026] 8, the horn cover 12 includes a first cylindrical portion 12B, a second cylindrical portion 12C, a first top portion 12D, and a second top portion 12E. The first cylindrical portion 12B, the second cylindrical portion 12C, the first top portion 12D, and the second top portion 12E are integrally formed of a synthetic resin material and are arranged coaxially with one another.

[0027] The first cylindrical portion 12B and the second cylindrical portion 12C are cylindrical. The first cylindrical portion 12B has a smaller outer diameter and inner diameter than the second cylindrical portion 12C. The tip side of the first cylindrical portion 12B in the axial direction Z protrudes further toward the tip side in the axial direction Z than the tip side end of the second cylindrical portion 12C in the axial direction Z. The bottom side of the first cylindrical portion 12B in the axial direction Z overlaps with the second cylindrical portion 12C in the radial direction X.

[0028] A first top portion 12D is connected to an edge of the first cylindrical portion 12B on the tip side in the axial direction Z. The first top portion 12D closes an opening on the tip side in the axial direction Z of the first cylindrical portion 12B. An opening portion 12A is disposed in the center of the first top portion 12D. The opening portion 12A has a rectangular shape that is long in the long side direction X1 and small in the short side direction X2 in a plan view.

[0029] An internal thread portion 12G (see FIG. 12) into which the fastening bolt B is inserted is formed on the inner circumferential surface of the second cylindrical portion 12C.

[0030] The second apex portion 12E has an annular shape connecting the first cylindrical portion 12B and the second cylindrical portion 12C in the radial direction X. Specifically, the second apex portion 12E is disposed between portions of the outer circumferential surface of the first cylindrical portion 12B and the inner circumferential surface of the second cylindrical portion 12C that overlap with each other in the radial direction X.

[0031] The second top portion 12E has a through hole 12F. In a plan view, the through hole 12F is disposed outside the opening 12A in the long side direction X1. A pair of the through holes 12F are disposed in the second top portion 12E at positions sandwiching the opening 12A in the long side direction X1. The through holes 12F penetrate the horn cover 12 in the axial direction Z.

[0032] (1-4) Structure of horn cap 13 7, horn cap 13 is a cylindrical member. Horn cap 13 is attached to the tip side of horn cover 12 in the axial direction Z. Horn cap 13 is made of a light-transmitting synthetic resin material.

[0033] Horn cap 13 is open on both sides in the axial direction Z. Horn cap 13 has a rectangular shape with rounded corners in a plan view. Horn cap 13 is disposed coaxially with ultrasonic horn 11.

[0034] Horn cap 13 extends in axial direction Z along the outer shape of horn body 11B. Horn cap 13 has a tapered shape in which the outer and inner diameters gradually decrease toward the tip side in axial direction Z. As shown in Fig. 5, the inner peripheral surface of horn cap 13 is spaced from the outer surface of horn body 11B so as not to come into contact with horn body 11B.

[0035] The ultrasonic cleaner 1 further includes a holder 14 and a water-stop packing 15 .

[0036] (1-5) Structure of holder 14 5 and 8, holder 14 has a cylindrical shape that covers the entire circumference of housing portion 11E and flange portion 11F of ultrasonic horn 11 from the outside in radial direction X. Holder 14 fixes ultrasonic horn 11 to horn cover 12. Holder 14 is disposed coaxially with ultrasonic horn 11.

[0037] 7, the holder 14 includes a fixed cylinder portion 14A, a holding portion 14B, and an attachment portion 14C. The fixed cylinder portion 14A, the holding portion 14B, and the attachment portion 14C are integrally formed from a synthetic resin material, and are arranged coaxially with one another.

[0038] The fixed cylinder portion 14A has a cylindrical shape that is octagonal in plan view. The holding portions 14B are arranged in pair on the outside of the fixed cylinder portion 14A in the long side direction X1. The holding portions 14B have a plate shape extending in the axial direction Z. The holding portions 14B protrude toward both sides in the axial direction Z beyond the fixed cylinder portion 14A. The mounting portions 14C are provided on the outer peripheral surface of the fixed cylinder portion 14A. A fastening bolt B is inserted into the mounting portions 14C.

[0039] (1-6) Structure of watertight packing 15 5 and 7, the waterproof gasket 15 has an annular shape with both end faces in the axial direction Z formed flat. The waterproof gasket 15 ensures waterproofing between the inside and outside of the main body 10. The waterproof gasket 15 is disposed coaxially with the ultrasonic horn 11.

[0040] Fig. 9 is a diagram showing the structure of the water stop gasket 15. Fig. 9A is an external view of the water stop gasket 15 as viewed from the tip side in the axial direction Z. Fig. 9B is a front view of the water stop gasket 15.

[0041] As shown in Figs. 9A and 9B, the watertight packing 15 includes a packing body 15A and a protruding portion 15B. The packing body 15A is annular. The thickness of the packing body 15A in the axial direction Z is constant over the entire area. The outer shape of the packing body 15A is shaped to fit the flange portion 11F of the horn body 11B in a plan view. The packing body 15A has an insertion hole through which the horn body 11B is inserted. The insertion hole is circular in a plan view.

[0042] The protruding portion 15B protrudes outward in the long side direction X1 from the outer end of the packing body 15A in the long side direction X1. The protruding portion 15B is formed so that the length in the short side direction X2 is greater than the length in the long side direction X1.

[0043] (1-7) Mounting structure of each component Fig. 10 is an enlarged view of a main part of the ultrasonic cleaner 1 shown in Fig. 5. Fig. 11 is an enlarged view of a main part of a cross section taken along line XI-XI in Fig. 4. Fig. 12 is an enlarged view of a main part of a cross section taken along line XII-XII in Fig. 4.

[0044] 10 to 12, tip portion 11D of horn body 11B protrudes outward through opening 12A of horn cover 12. Horn body 11B is entirely covered in the circumferential direction Y by horn cover 12 and horn cap 13.

[0045] Holder 14 is disposed between horn cover 12 and a part of base 11C of horn body 11B in the radial direction X. As shown in Fig. 12, holder 14 is fixed to horn cover 12 by fastening bolt B inserted into mounting portion 14C. In this way, holder 14 holds base 11C of horn body 11B.

[0046] 10 to 12, flange portion 11F of horn body 11B is held by an end face on the tip side in the axial direction Z of fixed cylinder portion 14A of holder 14. Horn cover 12 and holder 14 sandwich flange portion 11F of base portion 11C of horn body 11B in the axial direction Z.

[0047] The lower edge of horn cap 13 is inserted between first cylindrical portion 12B and second cylindrical portion 12C. A fixing piece (not shown) formed on the lower edge of horn cap 13 may be inserted into through hole 12F formed in second top portion 12E of horn cover 12. Through hole 12F is located outside in the radial direction X of flange portion 11F of horn body 11B.

[0048] 10, waterproof gasket 15 is disposed on the tip side of flange portion 11F in the axial direction Z. Waterproof gasket 15 is sandwiched in the axial direction Z between flange portion 11F and second top portion 12E of horn cover 12. Therefore, waterproof gasket 15 can ensure waterproofing between horn cover 12 and flange portion 11F.

[0049] The waterproof gasket 15 is held on the end face of the tip side of the flange portion 11F in the axial direction Z from the bottom side in the axial direction Z. In addition, the waterproof gasket 15 is held by the holding portion 14B of the holder 14 from the bottom side in the axial direction Z.

[0050] The protruding portion 15B of the watertight gasket 15 overlaps with the through hole 12F of the horn cover 12 in the axial direction Z. That is, the outer end portion of the watertight gasket 15 in the long side direction X1 protrudes outward in the long side direction X1 and overlaps with the through hole 12F in the axial direction Z. Therefore, the watertight gasket 15 can effectively prevent water from entering through the through hole 12F of the horn cover 12.

[0051] Here, "overlapping in the axial direction Z" is not limited to the case where the protruding portion 15B overlaps in the axial direction Z over the entire area of ​​the through hole 12F, but also includes the case where the protruding portion 15B overlaps in the axial direction Z with a portion of the through hole 12F.

[0052] (2) Drive circuit configuration Next, a drive circuit for the ultrasonic cleaner 1 will be described.

[0053] As shown in FIG. 5, the ultrasonic cleaner 1 includes a battery BT, a main circuit board 30, a transformer 31, a drive unit 103, an operation circuit board 32, a push button switch 10C, and an operation circuit board 32.

[0054] The battery BT is rechargeable. The battery BT and the main circuit board 30 are built into the body cover 10A. A drive unit 103 including a transformer 31 is mounted on the main circuit board 30. The operation circuit board 32 is disposed inside the body cover 10A, on the bottom side in the axial direction Z. The operation circuit board 32 is electrically connected to the push button switch 10C.

[0055] 13 is a circuit diagram showing a drive circuit of the ultrasonic cleaner 1. As shown in FIG. 13, the ultrasonic cleaner 1 includes a DC / DC conversion unit 101, a control device 102, a drive unit 103, and an oscillation circuit 106.

[0056] The positive terminal of the battery BT is connected to the input terminal of the DC / DC conversion unit 101. The power supply terminal VDD of the control device 102 is connected to the output terminal of the DC / DC conversion unit 101. The power supply terminal VCC of the control device 102 is connected to the negative terminal of the battery BT. Furthermore, the voltage input terminal VIN of the control device 102 is connected to the positive terminal of the battery BT.

[0057] Here, the DC / DC converter 101 converts, for example, the DC voltage of 5.5V of the battery BT into a DC voltage of 3.3V in accordance with the power supply voltage specifications of the control device 102 .

[0058] A drive signal is output from the control device 102 to the drive section 103. In addition, a signal from a switch section 104 is input to the control device 102.

[0059] The driving unit 103 drives the ultrasonic transducer 11A in accordance with a driving signal from the control device 102. In this embodiment, the frequency of the ultrasonic vibration is set to 38 kHz. The frequency of the ultrasonic vibration may be any frequency suitable for washing clothes, between 30 kHz and 40 kHz.

[0060] (3) Operation of ultrasonic cleaner 1 Next, the driving state of the ultrasonic cleaner 1 will be described. In the ultrasonic cleaner 1, the push button switch 10C is pressed by the user. This causes power to be supplied from the battery BT, and the DC / DC conversion unit 101, the control device 102, the driving unit 103, and the oscillation circuit 106 operate. Then, the driving unit 103 drives the ultrasonic transducer 11A to vibrate. The vibration of the ultrasonic transducer 11A causes the ultrasonic horn 11 to vibrate.

[0061] Then, the tip of the horn portion 14a of the ultrasonic horn 11 is brought into contact with the clothes soaked in water, which is an example of a cleaning medium. As a result, the ultrasonic cleaner 1 removes dirt adhering to the clothes by vibration.

[0062] At this time, the user may bring the edge along the long side of tip 11D of horn body 11B into contact with the object to be cleaned to vibrate ultrasonic horn 11. This is because it is easier to increase the contact area with the object to be cleaned by bringing the edge along the long side of tip 11D into contact with the object to be cleaned rather than the edge along the short side, thereby enabling more efficient cleaning.

[0063] Next, when the push button switch 10C is pressed, the ultrasonic horn 11 stops the ultrasonic vibration and the power is turned off. With the above, the operation of the ultrasonic cleaner 1 is finished.

[0064] As described above, in the ultrasonic cleaner 1 according to this embodiment, the holder 14, together with the horn cover 12, sandwiches the flange portion 11F, which is part of the base portion 11C of the horn body 11B, in the axial direction Z. The holder 14 is fixed to the horn cover 12 to hold the base portion 11C. This makes it possible for the ultrasonic horn 11 to be firmly held by the holder 14 and the horn cover 12, and the ultrasonic horn 11 can be supported with a simple structure.

[0065] Moreover, the waterproof gasket 15 is disposed only on one side (the tip side in this embodiment) of the flange portion 11F in the axial direction Z. Then, the flange portion 11F is pressed toward the horn cover 12 by tightening the fastening bolts B, and the waterproof gasket 15 is crushed and deformed in the Z direction. This seals the gap between the horn cover 12 and the ultrasonic horn 11. With this configuration, the waterproof gasket 15 can be easily assembled to the flange portion 11F, compared to a configuration in which the flange portion 11F is covered from both sides in the axial direction Z with a gasket. This allows the manufacturability of the ultrasonic cleaner 1 to be improved.

[0066] Second Embodiment The ultrasonic cleaner 1 according to the second embodiment of the present invention has a different structure of the water blocking packing 15 from that of the first embodiment.

[0067] (4) Structure of this embodiment Fig. 14A is a perspective view of the water stop gasket 15 according to the second embodiment. Fig. 14B is a plan view of the water stop gasket 15 according to the second embodiment. Fig. 14C is another perspective view of the water stop gasket 15 according to the second embodiment. More specifically, Fig. 14C is a perspective view of the water stop gasket 15 as viewed from the bottom side in the axial direction Z.

[0068] As shown in FIGS. 14A to 14C, in the ultrasonic cleaner 1, the protruding portion 15B of the watertight packing 15 is formed to be thicker in the axial direction Z than the packing body 15A.

[0069] Fig. 15 is an enlarged view of a main portion of a vertical cross section of an ultrasonic cleaner 1 according to a second embodiment. As shown in Fig. 15, in the ultrasonic cleaner 1, the protruding portion 15B of the waterproof packing 15 covers the flange portion 11F of the horn body 11B from the outside in the long side direction X1. Therefore, the flange portion 11F is held by the waterproof packing 15 from both sides in the long side direction X1.

[0070] In this manner, in the ultrasonic cleaner 1 according to this embodiment, the flange portion 11F can be held by the waterproof packing 15 from both sides in the long side direction X1, so that the waterproofing performance of the waterproof packing 15 can be ensured.

[0071] In the ultrasonic cleaner 1, the edge of the ultrasonic horn 11 along the long side is in contact with the object to be cleaned. Therefore, the vibration component in the short side direction X2 perpendicular to the long side direction X1 of the vibration by the ultrasonic vibrator 11A is more effective. In the ultrasonic cleaner 1, the waterproof packing 15 does not cover the flange portion 11F from the outside in the short side direction X2.

[0072] Therefore, when the tip 11D is in contact with the object to be cleaned, the watertight packing 15 can suppress the vibration of the horn body 11B in the short side direction X2 from being hindered. Also, in the long side direction X1 perpendicular to the short side direction X2, the watertight packings 15 on both sides of the horn body 11B are thicker than other parts. Therefore, the line in the long side direction X1 passing through the center of the horn body 11B acts as a support axis for the horn body 11B, and the vibration in the short side direction X2 can be stably transmitted to the tip 11D. That is, in the ultrasonic cleaner 1 according to this embodiment, the watertightness around the flange portion 11F can be ensured while ensuring the vibration efficiency of the horn body 11B.

[0073] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 15). However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. In addition, the components disclosed in the above embodiments can be modified as appropriate. For example, a certain component among all the components shown in one embodiment may be added to a component of another embodiment, or some components among all the components shown in one embodiment may be deleted from the embodiment.

[0074] In addition, the drawings are mainly schematic illustrations of each component to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. In addition, the configurations of each component shown in the above embodiment are merely examples and are not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially deviate from the effects of the present invention. [Industrial Applicability]

[0075] The present disclosure is applicable to ultrasonic cleaners. [Explanation of symbols]

[0076] 1. Ultrasonic cleaner 10 Main body 11 Ultrasonic horn 11A ultrasonic transducer 11B Horn body 11C base 11D Tip 11F Flange part 12 Horn cover 13 Horn Cap 14 Holder 15 Watertight packing 15A Packing body 15B Extension 20 Cap section

Claims

1. an ultrasonic horn having a horn body that includes an ultrasonic transducer that vibrates at an ultrasonic frequency in response to a drive signal, and that extends in an axial direction from a base to a tip, the ultrasonic transducer being built into the base, and the tip vibrating in response to the vibration of the ultrasonic transducer; a horn cover that covers the ultrasonic horn over an entire circumferential area around a central axis of the horn body as viewed from the axial direction; a holder that holds a part of the base together with the horn cover in the axial direction and is fixed to the horn cover to hold the base; An ultrasonic cleaner comprising:

2. The watertight packing further includes an annular watertight packing having flat end faces in the axial direction, A flange portion is formed on the base portion of the horn body, the flange portion expanding outward in a radial direction perpendicular to the axial direction, The horn cover and the holder sandwich the flange portion in the axial direction, The ultrasonic cleaner according to claim 1 , wherein the water-stopping gasket is disposed on one side of the flange portion in the axial direction and is sandwiched between the flange portion and the horn cover.

3. the horn cover is disposed radially outward of the flange portion as viewed in the axial direction, and has a through hole passing through the horn cover in the axial direction, The ultrasonic cleaner according to claim 2 , wherein the outer end portion of the watertight gasket in the radial direction overlaps with the through hole in the axial direction.

4. The tip portion of the horn body has a rectangular shape having long sides and short sides when viewed from the axial direction, the horn cover has an opening through which the tip portion is inserted, The through hole is disposed on the outside of the opening in a long side direction along the long side, The ultrasonic cleaner according to claim 3 , wherein an outer end portion of the watertight gasket in the long side direction overlaps with the through hole in the axial direction.

5. The watertight packing is A packing body having an annular shape; a protruding portion protruding outward in the long side direction from an outer end portion of the packing body in the long side direction; Have The ultrasonic cleaner according to claim 4 , wherein the protruding portion is formed to be thicker in the axial direction than the packing body, and covers the flange portion from outside in the long side direction.

6. A water-stopping packing used in the ultrasonic cleaner according to any one of claims 1 to 4, a packing body having an annular shape with both end faces in the axial direction formed flat; a protruding portion protruding from an outer end of the packing body toward an outer side in a radial direction perpendicular to a central axis of the horn body; Have The watertight gasket, wherein the protruding portion is formed to be thicker in the axial direction than the gasket body.

Images