JPH05315667A - Electrostriction effect element - Google Patents

Abstract

PURPOSE:To remove drawback of a conventional electrostriction effect element that it breaks by the stress from a driven body, since it is in free condition without a guide at the end of a drive, and that it is bent and displaced by the influence of the incorporation state of an inner element. CONSTITUTION:Projections 4a and 4b for guide are provided at the side of one metallic member of an electrostriction effect element which seals the laminate, wherein electrostrictive ceramic layers and inner electrode conductor layers are stacked alternately, with a metallic case 1, an upper metallic member 2, and a lower metallic member 3, a metallic member provided with rails 5a and 5b for guide is attached to the other metallic member 3. This prevents the element from bending by the stress of a driven body and the element from breaking, and also the displacement can be taken out straight irrespective of the incorporation state of the inner element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostrictive effect element, and more particularly to a casing structure.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing a conventional electrostrictive effect element. The conventional electrostrictive effect element shown in FIG. 6 uses a laminated type element so that a large mechanical energy can be generated at a low voltage. Further, in order to enhance environment resistance such as humidity resistance, the element is placed in a metal case and above and below. The attached metal member is hermetically sealed. And the metal fitting for attachment is attached to one end part of this.

In FIG. 6, the laminated electrostrictive effect element as described above is put in a metal case 1, and an upper metal member 2 is vertically arranged.
Then, the lower metal member 3 is inserted, the metal case 1 and the upper metal member 2 and the lower metal member 3 are welded at their respective joints, and further the mounting metal fitting 6 is attached to the lower metal member 3 to obtain the electrostrictive effect element. The structure is a hermetically sealed structure as a whole.

[0004]

In the above-mentioned conventional electrostrictive effect element, the upper metal member serving as the driving end portion is in a free state without a guide, and therefore, depending on the mounting state, There is a defect that the element is bent under the influence of stress from the driven body and the element is broken.

Further, there is a drawback that the element is bent and displaced depending on the assembled state of the internal element, and the displacement cannot be obtained in the correct direction.

The object of the present invention is that the element is broken due to the stress from the driven body depending on the mounting state of the element, or the element is bent and displaced depending on the assembled state so that the displacement cannot be obtained in the correct direction. An object of the present invention is to provide an electrostrictive effect element capable of removing the above.

[0007]

The electrostrictive effect element of the present invention is an electrostrictive element obtained by sealing a laminated body in which electrostrictive ceramic layers and internal electrode conductor layers are alternately laminated with a metal case and upper and lower metal members. In the effect element, one of the metal members is provided with a guide projection on a side surface thereof, and the other metal member is provided with a guide rail.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. 1 and 2 are a perspective view and a top view of a first embodiment of an electrostrictive effect element of the present invention.

The electrostrictive effect element of the first embodiment is formed as described below. First, the element is a metal case 1
Then, the upper metal member 2 and the lower metal member 3 provided with the airtight terminal are put therein and assembled, and then the product is put in a vacuum heating and drying container, and vacuum heating and drying are performed at a temperature of 150 ° C. for 3 hours. Next, after replacing the inside of the product with nitrogen gas, the metal case 1, the upper metal member 2 and the lower metal member 3 are welded together by using a carbon dioxide gas laser having a nitrogen gas atmosphere in the apparatus.

Subsequently, guide projections 4a and 4b formed of a wear-resistant metal material such as Ti or Mo are bonded to the upper metal member 2 of the hermetically sealed element [temperature 17].
0 ° C, time 1H].

Then, after the guide rails 5a and 5b formed of the same metal material as the guide protrusions 4a and 4b are adhered to the mounting metal fitting 6, the guide protrusions 4a and 4b and the rails 5a and 5b are fitted together. In this way, the mounting metal fitting 6 is mounted on the lower metal member 3 and screwed.

Next, a second embodiment will be described.

The second embodiment differs from the first embodiment in that the upper metal member 2, the guide projections 4a and 4b, the mounting metal fitting 6 and the guide rails 5a and 5b are welded by laser welding or the like. Is the point that is used.

Next, a third embodiment will be described.
The third embodiment differs from the first embodiment in that the guide protrusions 4a, 4b and the rails 5a, 5b are made of a resin such as Teflon.

FIG. 3 is a top view of the fourth embodiment.

The difference between the fourth embodiment and the first embodiment is that the connecting portions of the guide protrusions 4a, 4b and the rails 5a, 5b are round.

FIG. 4 is a top view of the fifth embodiment.

The fifth embodiment differs from the first embodiment in that the joints between the guide protrusions 4a and 4b and the rails 5a and 5b are triangular.

FIG. 5 is a top view of the sixth embodiment.

The sixth embodiment differs from the first embodiment in that the shapes of the joints of the guide projections 4a and 4b and the rails 5a and 5b are fitted to each other.

As described above, the present invention can be implemented in the same manner even if the processing method, the material or the protrusion, and the rail shape are changed.

[0022]

As described above, according to the present invention, in the electrostrictive effect element which is sealed by the metal case and the upper and lower metal members, the upper metal member is provided with the guide projection and is fitted with the guide projection. By mounting the mounting bracket having the guide rail formed on the lower metal member, even when stress is applied from the driven body, the element does not break even if the element is broken without bending. Further, there is an effect that the displacement can be taken out in the correct direction regardless of the built-in state of the internal element.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of an electrostrictive effect element according to the present invention.

FIG. 2 is a top view of the first embodiment of the electrostrictive effect element of the present invention.

FIG. 3 is a top view of a fourth embodiment of the electrostrictive effect element of the present invention.

FIG. 4 is a top view of a fifth embodiment of the electrostrictive effect element of the present invention.

FIG. 5 is a top view of a sixth embodiment of the electrostrictive effect element of the present invention.

FIG. 6 is a perspective view of an example of a conventional electrostrictive effect element.

[Explanation of symbols]

 1 Metal Case 2 Upper Metal Member 3 Lower Metal Member 4a, 4b Guide Protrusion 5a, 5b Guide Rail 6 Mounting Bracket

Claims (6)

[Claims] 1. An electrostrictive effect element obtained by sealing a laminated body in which electrostrictive ceramic layers and internal electrode conductor layers are alternately laminated with a metal case and upper and lower metal members, wherein one of the metal members is a metal member. An electrostrictive effect element, characterized in that a projection for guiding is provided on a side surface of the metal plate, and a mounting metal fitting having a rail for guiding is formed on the other metal member. 2. The electrostrictive effect element according to claim 1, wherein the guide projection is made of a metal member having wear resistance. 3. The electrostrictive effect element according to claim 1, wherein the guide projection is made of a resin molding material such as Teflon. 4. The electrostrictive effect element according to claim 1, wherein the guide rail is made of a metal member having wear resistance. 5. The electrostrictive effect element according to claim 1, wherein the guide rail is formed of a resin molding member such as Teflon. 6. The electrostrictive effect element according to claim 1, wherein a shape of a joint portion of the guide protrusion and the rail has a square shape, a triangular shape, or a round shape.