JPH10156286A - Bolt tightening langevin type oscillator and ultrasonic cleaning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the connection of a lead wire and to improve efficiency by reducing a mounting work time by constituting the terminal take-out part of an electrode plate and the lead wire connected to the take-out part in freely attachable/detachable linking structure. SOLUTION: A hole 721 and a chamfer 722 are formed in the terminal take- out part 72 of an electrode plate for receiving an external power source. Besides, the part 72 and a terminal tool 8 of freely attachable/detachable structure are attached to the end of a lead wire 9, plate springs 82, 83 as a socket which wraps up a projection 81 engaging with the hole 721 and the part 72 so that they can be inserted into it are formed in the tool 8, and a cylindrical part 84 into which the conductive part of the lead wire 9 is inserted is formed at the other end. The tool 8 is inserted into the part 72 lest the part 72 is pushed out by the spring pressure of the spring parts 82, 83. Besides, when the tool 8 is removed from the part 72, the spring parts 82, 83 are extracted to spring up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolted Langevin type vibrator used in an ultrasonic cleaning apparatus, and more particularly to a structure of a terminal lead-out portion of an electrode plate and a lead wire connected to the terminal lead-out portion.

[0002]

2. Description of the Related Art A conventional embodiment will be described with reference to the drawings. FIG. 5 is a perspective view showing a conventional example, and FIG. 6 is a perspective view showing another conventional example.

[0003] The bolted Langevin type vibrator comprises a negative electrode plate 3a, an annular piezoelectric ceramic 4b, and a positive electrode between a circular rear mass 1 and a front mass 2 having a female screw portion 2a at the center thereof. The electrode plate 3b and the annular piezoelectric ceramic 4a are sequentially laminated. Further, a stud bolt 5 having effective thread portions at both ends is provided with a hexagon nut 6, a rear mass 1, and a piezoelectric ceramic 4.
a, 4b and the electrode plates 3a, 3b, and further screwed into the female thread portion 2a of the front mass 2. Then, in this state, the stud bolt 5
By tightening the hexagon nut 6 through the rear mass 1,
The electrode plates 3a and 3b, the piezoelectric ceramics 4a and 4b, and the front mass 2 are integrated. The structure of the electrode plates 3a and 3b for receiving an external power supply has an annular main portion and a terminal take-out portion, and the terminal take-out portion is provided with a hole for inserting an electric wire. The conductive portion of No. 9 was inserted and locked in the hole, and joined with solder H.

[0004] However, in the case of soldering, skill is required for the soldering, and it takes a long time for the operation. Also,
Depending on the amount of solder and the state of solder application (when the terminals are applied in a non-uniform state), the piezoelectric ceramic may be degraded by heating, causing abnormal resonance and causing damage to the terminals.

In order to solve the above problem, a terminal having a crimping structure without soldering has been devised (Japanese Utility Model Laid-Open No. 63-198300). As shown in FIG. 6, the terminal of this crimping structure has an annular main portion 311 and a terminal take-out portion 321, and a tip of the terminal take-out portion 321 is formed with a rounded cylindrical portion 322. Line 9
Was passed through the cylindrical portion 322 and crimped using a jig or the like.

[0006]

However, generally, a plurality of bolted Langevin type vibrators used for ultrasonic cleaning are densely arranged by arranging a plurality of them (see FIG. 7). Terminals must always be attached using jigs, so it may be difficult to insert jigs between multiple bolted Langevin type vibrators, and attaching lead wires is extremely workable. It was bad. In addition, some of the bolted Langevin type vibrators out of a plurality of bolted Langevin type vibrators failed, and if used in this state, the device side such as the oscillator would break down, and further, there would be no abnormal bolting. Even the Langevin type vibrator failed. However, in the conventional solder connection and crimping structure, which are terminal connection structures of a bolted Langevin type vibrator, it is extremely difficult to change the connection, and thus it is difficult to perform maintenance.

[0007] Accordingly, the present invention provides a method without using a jig.
It is an object of the present invention to provide a bolted Langevin type vibrator having excellent workability in which a terminal and a lead wire can be attached and detached very easily.

[0008]

In a bolted Langevin type vibrator in which a rear mass, an electrode plate, a piezoelectric ceramic and a front mass are integrated, a terminal lead-out portion of the electrode plate and a lead wire connected to the terminal lead-out portion are provided. And detachable locking structure.

With this configuration, the lead wires can be connected without applying heat, so that deterioration of the piezoelectric ceramic (element) is prevented. And since it is detachable, lead wire connection is facilitated, mounting work is made more efficient in less time, connection changes are easier, and maintenance is easier. Further, the weight of the connector portion and the mounting position do not greatly change with respect to the terminal, and abnormal resonance does not occur.

[0010] In the above structure, a lead terminal capable of temporarily short-circuiting a positive electrode and a negative electrode in a terminal of each of the electrode plates is provided.

With this configuration, a bolt-fastened Langevin type vibrator can be formed by using a thermosetting adhesive for the vibrating plate against a discharge due to a high voltage generated by the pyroelectric effect of the piezoelectric ceramic (the effect of generating charges due to a temperature difference). By temporarily shorting the plus and minus terminals during installation, it is possible to prevent discharge that is dangerous to the operator and also causes deterioration of the piezoelectric ceramic.
It is also effective against discharge due to temperature differences during transportation of the bolted Langevin type vibrator and during storage.

Further, the present invention is an ultrasonic cleaning apparatus using a bolted Langevin type vibrator in which a terminal take-out portion of the electrode plate and a lead wire connected to the terminal take-out portion are detachably provided. Features.

With this configuration, the lead wire can be easily attached and detached from the terminal of the bolted Langevin type vibrator. Therefore, the bolted Langevin type vibrator having the above-mentioned problem is removed, and a new bolted Langevin type vibrator is prepared. It can be replaced very easily. Further, when a plurality of bolted Langevin type vibrators are attached to the ultrasonic cleaning device, even if some bolted Langevin type vibrators are defective, the defective bolted Langevin type vibrator is temporarily used. In addition to maintaining the function as the cleaning device by changing the connection by skipping the element, it is possible to prevent the failure of the device such as the oscillator and the deterioration of the other bolted Langevin type vibrator without any abnormality. And
Replacement of the bolted Langevin type transducer can be performed very easily.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a bolted Langevin type vibrator showing a first embodiment of the present invention, and FIG. 2 is a partially broken perspective view of an electrode plate showing the first embodiment of the present invention. Note that the same parts as those in the related art are denoted by the same reference numerals.

The bolted Langevin type vibrator has a negative electrode plate 7a (nickel, nickel) between an annular rear mass 1 and a front mass 2 having a female thread portion 2a at the center thereof.
Cu-Ni-Zn, SUS, composed of thin metal pieces such as SUS, etc.), annular piezoelectric ceramics 4b, positive electrode plate 7b (thin sheets of nickel, Cu-Ni-Zn, SUS, nickel silver, etc.) And a ring-shaped piezoelectric ceramic 4a. Then, a stud bolt 5 having effective screw portions at both ends penetrates the hexagon nut 6, the rear mass 1, the piezoelectric ceramics 4a and 4b and the electrode plates 7a and 7b, and furthermore, the front mass 2
It is structured to be screwed into the female screw portion 2a. In this state, the hexagonal nut 6 is further tightened via the stud bolt 5, so that the rear mass 1, the electrode plate 7
a, 7b, the piezoelectric ceramics 4a, 4b, and the front mass 2 are integrated.

As shown in FIG. 2, the terminal extraction portion 72 of the electrode plate for receiving an external power supply has a hole 721 and a chamfer 722 formed therein. On the other hand, a terminal member 8 having a structure detachable from the take-out portion 72 is attached to the end of the lead wire 9. This terminal 8 has
A convex portion 81 that fits into the hole 721, and leaf spring portions 82 and 83 as sockets that wrap the terminal take-out portion 72 so as to be inserted therein, are formed at the other end of the tube that sandwiches a conductor portion of a lead wire. A shape portion 84 is formed. Then, when the terminal member 8 provided with the lead wire 9 is inserted into the terminal take-out portion 72, the hole 72 of the terminal take-out portion is formed.
When the terminal member 8 is detached from the terminal take-out portion 72 when the terminal take-out portion 72 is stopped by being fitted by the projection 81 of the terminal device and fitted to the terminal take-out portion by the spring pressure of the leaf spring portions 82, 83. The leaf spring can be easily pulled out by jumping up. These electrode plates and terminals can be easily formed by press working or the like. In addition, terminal tool 8
Is formed of a material such as brass and phosphor bronze.

Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 3 is a perspective view of a bolted Langevin type vibrator according to a second embodiment of the present invention. Since the same electrode plate and terminal as those in the first embodiment were used, FIG. 2 is referred to.

The bolted Langevin type vibrator has an annular rear mass 11 having a female thread (not shown) at the center and a front mass 21 having a female thread 21a at the center. Negative electrode plate 7a (nickel, Cu
-Composed of thin metal pieces such as Ni-Zn, SUS, and nickel silver), annular piezoelectric ceramics 4b, positive electrode plate 7b
(Made of a thin metal piece such as nickel, Cu-Ni-Zn, SUS, nickel silver, etc.) and an annular piezoelectric ceramic 4a. further,
Stud bolts 5 having effective screw portions at both ends penetrate the piezoelectric ceramics 4a, 4b and the electrode plates 7a, 7b,
Further, the front mass 21 is screwed into the female thread portion 21a. In this state, the rear mass 11, the electrode plates 7a and 7b, the piezoelectric ceramics 4a and 4b, and the front mass 21 are integrated by further tightening the rear mass 11 via the stud bolt 5. The rear mass 11 and the front mass 21 are formed with flat portions 111 and 211 required for fastening.

As shown in FIG. 2, the terminal extraction portion 72 of the electrode plate for receiving an external power supply is formed with a hole 721 and a chamfer 722. On the other hand, the short-circuit lead wire 9
Terminals 8, 8 having a structure that can be easily attached to the take-out portion 72 are also attached to the tip of the terminal 1. The terminal members 8 have a convex portion 81 that fits into the hole 721,
Leaf spring portions 82 and 83 are formed as sockets that wrap the terminal take-out portion 72 so as to be inserted therein.
At the other end, the cylindrical portion 84 sandwiching the conductor of the lead wire
Are formed. Then, when the terminal tool 8 provided with the lead wire 91 is inserted into the terminal take-out part 72, the hole 721 of the terminal take-out part and the projection 81 of the terminal tool are fitted and stopped, and the leaf spring parts 82, 83 When the terminal member 8 is removed from the terminal take-out portion 72 without being pressed out of the terminal take-out portion by the spring pressure, the leaf spring can be easily pulled out by flipping up. These electrode plates,
The terminal can be easily formed by press working or the like. The short-circuiting lead wire 91 is used to prevent the piezoelectric ceramic from being discharged by temporarily short-circuiting it from the time of shipment to the mounting of the bolted Langevin type vibrator, and needs to be removed when it is connected to the oscillator.

Next, a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 is a perspective view of an electrode plate showing a third embodiment of the present invention.

As shown in FIG. 4, the terminal take-out portion 102 of the electrode plate 10 for receiving an external power supply is formed in a columnar shape, and has a groove 1021 formed therein. On the other hand, a terminal member 80 having a structure that can be easily attached to the take-out portion 102 is also attached to the end of the lead wire 9. The terminal 80 has a step 801 fitted into the groove 1021.
And a cylindrical leaf spring portion 802 or 803 as a socket that wraps the terminal take-out portion 102 so as to be inserted therein, and the cylindrical portion 804 that sandwiches a conductor portion of a lead wire is formed at the other end. I have. Then, when the terminal tool 80 provided with the lead wire 9 is inserted into the terminal take-out part 102, the groove 1021 of the terminal take-out part and the step part 801 of the terminal tool are fitted and stopped, and the cylindrical leaf spring part 802, The terminal take-out portion is pressed down by the spring pressure of 803 and does not come out.
When removing 0, the tubular leaf spring can be easily pulled out by jumping up. These electrode plates and terminals can be easily formed by press working or the like.

In the first to third embodiments of the present invention, the terminal is configured to wrap the terminal as a socket. On the contrary, even if the terminal is configured to wrap the terminal as a socket, there is no particular problem. Absent. Also, a hole in the terminal take-out part,
A female locking portion such as a groove is provided, and the terminal device is provided with a male locking portion such as a convex portion, a step portion, or the like, which can be locked with each other. A stop portion may be provided, and the terminal member may be provided with a female locking portion.

As shown in FIG. 7, the bolt-fastened Langevin type vibrator described in the first to third embodiments uses a bolt Y welded to the back side of the bottom surface of the cleaning tank X and a joining material (not shown). ), And screwed into a screw hole Z formed in the front mass of the bolted Langevin type vibrator. The terminals of each bolted Langevin type vibrator are connected in parallel by a lead wire (not shown) and connected to an oscillator or the like (not shown) to complete the ultrasonic cleaning device.

[0024]

According to the first aspect of the present invention, the lead wires can be connected without applying heat, so that the deterioration of the piezoelectric ceramic (element) is prevented. And because it is removable,
The connection of the lead wires is facilitated, the efficiency of the mounting work is reduced in a short time, the connection is easily changed, and the maintenance is easy. Further, the weight of the connector portion and the mounting position with respect to the terminal do not greatly change, and abnormal resonance does not occur. Therefore, it is possible to provide a bolted Langevin type vibrator having high product reliability.

According to the second aspect of the present invention, against a discharge due to a high voltage generated by a pyroelectric effect of a piezoelectric ceramic (an effect of generating charges due to a temperature difference), a bolted Langevin type vibration using a thermosetting adhesive for a vibration plate. By temporarily shorting the plus and minus terminals when attaching the child, it is possible to prevent electric discharge which is dangerous for the operator and also causes deterioration of the piezoelectric ceramic. It is also effective against discharge due to temperature differences during transportation of the bolted Langevin type vibrator and during storage.

According to the third aspect of the present invention, the lead wire can be easily attached to and detached from the terminal of the bolted Langevin type vibrator. Can be replaced very easily. Also,
When a plurality of bolted Langevin type vibrators are attached to the ultrasonic cleaning device, even if some bolted Langevin type vibrators fail, even temporarily, the defective bolted Langevin type vibrator is used. By skipping and changing the connection, the function as a cleaning device can be maintained, and at the same time, the failure of the device such as the oscillator and the deterioration of other bolted Langevin type vibrators having no abnormality can be prevented. And
Replacement of the bolted Langevin type transducer can be performed very easily. Therefore, since the terminal and the lead wire can be freely attached and detached without using a jig, the connection of the lead wire is easy, the connection can be easily changed, and the maintenance and maintenance can be easily performed. Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view of an electrode plate showing the first embodiment of the present invention.

FIG. 3 is a perspective view showing a second embodiment of the present invention.

FIG. 4 is a perspective view of an electrode plate showing a third embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional example.

FIG. 6 is a perspective view of an electrode plate showing another conventional example.

FIG. 7 is a sectional view showing a state in which a bolted Langevin type vibrator is attached to an ultrasonic cleaning tank.

[Explanation of symbols]

 Reference numerals 1, 11: rear mass 2, 21: front mass 3a, 3b, 7a, 7b, 10: electrode plate 4a, 4b: piezoelectric ceramic 5: stud bolt 6: hexagon nut 8 , 80 ... Terminal 9 ... Lead wire 91 ... Short lead wire

Claims (3)

[Claims] In a bolted Langevin type vibrator in which a rear mass, an electrode plate, a piezoelectric ceramic and a front mass are integrated, a terminal take-out portion of the electrode plate;
A bolted Langevin type vibrator characterized in that a lead wire connected to the terminal take-out portion has a detachable locking structure. 2. The bolted Langevin type vibrator according to claim 1, further comprising a lead terminal capable of temporarily short-circuiting a positive pole and a negative pole in a terminal of each of said electrode plates. 3. An ultrasonic cleaning apparatus using the bolted Langevin type vibrator according to claim 1.