JPS6039646Y2 - piezoelectric device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a piezoelectric device using a rectangular frame plate as a frame body, and embodiments of the invention will be described below with reference to the drawings.

In the figure, 1 is a rectangular frame plate, 2 is a rectangular opening 1a formed in the frame plate, and is seated on a small protrusion 1b on one end surface of the same rectangular opening 1a. A pair of notches lc are formed in the piezoelectric body 4, and a piezoelectric body is fixed by a spring seat plate 3 attached to the lc. A striker 5 that freely slides up and down along the inner wall surface of the opening 1a of the frame plate is engaged with a protrusion 1d formed on the other end surface of the opening 1a of the frame plate, and is attached to the striker 4. The piezoelectric body 2 is a pair of polarized piezoelectric elements 2aw22' and 2a*22' made of lead titanate zirconate ceramics, etc., which are mechanically connected in series and electrically connected to each other. are connected in parallel with a terminal plate 2b, which is normally connected with the inner opposing surface as a positive electrode, and a small protrusion 1b arranged on the outer end surface of each of the pair of piezoelectric elements 2a, 2a' and on one end surface of the opening of the frame body. The stator 2c is brought into contact with the stator 2c, and the striker 4 is pressed against the striker 4 by the energy storage spring 5, and is struck by the striker 4 which is pulled away against the energy storage spring 5 by an external operating mechanism (not shown). The indenter 2d, these piezoelectric elements 2a, 2a', the terminal plate 2b, and the stator 2c! 3 and the pressurizer 2d are aligned in the center hole, and the needle-shaped conductor connection portion 2b' extended from the terminal plate is projected outward (Although it also consists of an insulating case 2e made of synthetic resin or the like, the present invention two or more pairs of engagement grooves formed on the outer periphery of the insulating case 2e on a plurality of center lines that fit in the axial direction on the inner wall surface of the opening 1a of the frame plate;
In the figure, there are 4 pairs of 21.21.22.22.23 on the lower end surface.
23. On the upper end surface of 24 and 24, there are also four pairs of engagement grooves 1 corresponding to these four pairs of engagement grooves on the same axis, respectively.
21', 21'22', 22'... are formed.

Therefore, each of the above-mentioned engaging grooves 21.21 to 24°24 and 21', 21' to 24', and 24' were formed on the outer circumferential surface of the insulating case 2 with the outer circumferential surface as the bottom surface. On the contrary, the bottom surface is formed as a concave portion having a smaller diameter than the outer peripheral surface of the insulating case 2, and a pair of concave portions protrude inwardly from the inner wall surface of the opening 1a of the frame plate corresponding to the concave portion. Small protrusions may be formed and fitted within the opening of the frame plate, and the above-mentioned engagement grooves do not necessarily have to be provided as a pair on the upper and lower sides of the insulating case, but may be provided on only one side.

This type of piezoelectric device uses a rectangular frame plate as a frame body.
The frame plate has become widely used because it can be easily manufactured by simply punching out a metal plate, but conventionally it has been used to fit the inner wall surface of the opening of the frame plate onto the outer circumferential surface of the insulating case housing the piezoelectric material. Since a pair of matching axial grooves were provided for fixation, the protrusion direction of the needle-shaped conductive connecting portion that penetrates the insulating case and protrudes outward and connects to the high-voltage wire is directed toward the center of the piezoelectric body. Due to the extension of the wire, it is usually limited to one direction, up and down, perpendicular to the main surface of the frame plate, and there are various inconveniences in drawing out the high-voltage wire.

In contrast, in the present invention, as described above, a plurality of axial engagement grooves are provided on the outer circumferential surface of the insulating case around the outer periphery of the piezoelectric body, which fit in the inner wall surface of the opening of the frame plate that accommodates the piezoelectric body in the axial direction. Since the piezoelectric body is formed so as to face each other on the center line of the frame plate, the piezoelectric body is reliably held on the axis of the opening of the frame plate, and
Needle-shaped conductive connecting portions that protrude outward from the insulating case of the piezoelectric body and connect to high-voltage wires can be made to protrude on two or more different center lines, and the high-voltage wires can be pulled out from desired locations. This makes it easier to design various types of appliances using this type of piezoelectric device, such as gas appliances, and has excellent effects such as increasing safety.

[Brief explanation of the drawing]

The drawings show an embodiment of the piezoelectric device of the present invention, and FIG. 1 is a front view, FIG. 2 is a bottom view, FIG. 3 is a side sectional view taken along line E in FIG. 1, and FIG. 4 is an exploded perspective view. be. 1... Frame board, 1a... Opening, 2...
...Piezoelectric body, 2e...Insulation case, 21.
21-24, 24.21', 21'-24', 24'・
...Engagement groove, 4...Batterer, 5...
...Storage spring.

Claims (1)

[Scope of utility model registration request] A piezoelectric body, a striker for striking the piezoelectric body, and an energy storage spring for energizing the striker are arranged in a vertical line and stored in an opening of a frame plate;
In the fixed type, a plurality of axial engagement grooves are formed on the outer circumferential surface of the insulating case around the outer periphery of the piezoelectric body to be engaged with the frame plate and the inner wall surface of the opening thereof, facing each other on the intersecting center line. A piezoelectric device.