JPS609584Y2 - High voltage generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high voltage generator that generates high voltage by applying an impact force to a piezoelectric element.

High voltage generators using this type of piezoelectric element are widely used in gas lighters and other ignition devices.

By the way, in the conventional high voltage generator, the piezoelectric element is housed in a metal housing.

However, with this structure in which the piezoelectric element is placed inside a metal housing, a loud noise is generated when a hammer is struck against the pad to generate high voltage in order to apply pressure to the piezoelectric element. Insulation must be provided between the piezoelectric elements, resulting in the inconvenience of an increase in the number of parts.

For this reason, a structure in which a piezoelectric element is provided within an insulating resin case has recently been adopted.

However, when two piezoelectric elements are housed, a problem arises as to how to electrically connect both piezoelectric elements in parallel.

In view of the above points, the present invention aims to reduce the number of parts by constructing the main body case that houses the piezoelectric elements with insulating resin, and also has a structure that allows the piezoelectric elements to be electrically connected in parallel. The aim is to provide equipment.

1 to 3 show reference examples.

In these figures, a main body case 1 made of insulating resin has a rectangular cylindrical operating member storage section 2 and a piezoelectric element storage section 3 formed inside the operation member storage section 2 .

A pad 4 and piezoelectric elements 5A and 5B that receive an impact force are housed in the cylindrical recess in the piezoelectric element housing 3, and a high voltage extraction electrode 6 is inserted between these piezoelectric elements 5A and 5B.

A high voltage lead wire 7 is connected to this high voltage extraction electrode 6 and fixed to the main body case 1 by adhesive.

Further, a male screw 8 is carved on the outer periphery of the opening of the piezoelectric element storage portion 3, and a metal washer 9 is screwed onto this male screw 8.

Further, a one-shaped cam hole 10 is formed on the front surface of the main body case 1.

On the other hand, the operating member 11 is formed of insulating resin into a rectangular tube shape and has a cam hole 12 on the front side.

Inside the operating member 11, a hammer 14 having a hammer pin 13 that engages with the cam hole 12 and an impact spring 15 are provided.
is stored.

Then, a return spring 16 is provided inside the main body case 1, the operating member 11 is slidably fitted inside the main body case 1, and the hammer pin 13 is engaged with the 1-shaped cam hole 10, so that the main body case 1 can be operated. The member 11 is attached.

Now, in the main body case 1, a ground hole 20 is formed along the piezoelectric element storage section 3 in the arrangement direction of the piezoelectric elements 5A and 5B, and a metal rod 21 is inserted into this ground hole 20.

Then, when the metal rod 21 is tightened with the metal washer 9,
One end contacts the return spring 16 and the other end contacts the metal washer 9.

In order to prevent the metal washer 9 from loosening, an adhesive or a resin such as silicone rubber is provided between the metal washer 9 and the main body case 1 as necessary.

In the above configuration, in the normal state, as shown in FIG. 1, the operating member 11 is biased in the protruding direction, and the hammer pin 13 is engaged with the lower end of the single-shaped cam hole 10.

In this state, when the operating member 11 is pressed in the direction of arrow P against the elastic force of the impact spring 15, the impact spring 1 inside the operating member 11 is pressed.
5, the elastic force is accumulated.

When the operating member 11 is further pressed, the hammer pin 13 is pushed up by the action of the cam hole 12, and the hammer pin 13 and
The engagement with the lower end of the cam hole 10 is disengaged, and the hammer 14 suddenly moves to the left and hits the stopper 4 with force.

At this time, the negative side of the piezoelectric element 5A is connected to the pad 4 and the hammer 14.
, are electrically connected to the metal washer 9 via the return spring 16 and the metal rod 21.

That is, the piezoelectric elements 5A and 5B are electrically connected in parallel between the high voltage lead-out electrode 6 and the metal washer 9, and a high voltage is output between the high voltage lead wire 7 and the metal washer 9.

According to the above reference example, since the main body case 1 is made of insulating resin, insulation between the piezoelectric elements 5A, 5B and the main body case 1 is not required, and the structure can be simplified and the number of parts can be reduced.

Also, the metal rod 21 is used to connect the metal washer 9 and the return spring 16.
This eliminates the need for positioning work for the return spring 16, which would occur if a grounding member is formed integrally with the return spring 16, making assembly easy and suitable for automatic insertion.

However, when inserting the metal rod 21 into the ground hole 20, there is a problem in that it tends to get caught on the threads of the male screw 8 and the metal washer 9 also tends to loosen.

Embodiments of the high voltage generator according to the present invention will be described below with reference to the drawings.

4 to 6 show embodiments of the present invention.

In these figures, a ground hole 20A is formed in the main body case 1 along the piezoelectric element housing 3 in the arrangement direction of the piezoelectric elements 5A and 5B, and the ground hole 20A is formed on the outer periphery of the opening of the piezoelectric element housing 3. A guide groove 30 that is continuous with 20A and has the same curved surface is formed.

Then, the metal rod 21 is inserted into the ground hole 20A along the guide groove 30.

Then, after filling the guide groove 30 with adhesive or resin such as silicone rubber, the metal washer 9 is attached to the male screw 8 of the main body case 1.
is screwed onto.

Note that the other configurations are the same as those of the reference example described above.

According to the embodiment shown in FIGS. 4 to 6, the ground hole 20
Since the guide groove 30, which is an extension of A, is provided by cutting a part of the male screw 8, when the metal rod 21 is inserted into the ground hole 20A, the metal rod 21 does not get caught on the screw thread and can be inserted smoothly. Inserts can be performed and automatic inserts can be performed more easily.

Further, the resin and metal rod filled in the guide groove 30 have the advantage of acting as a locking mechanism for the metal washer 9.

As described above, according to the present invention, the main body case that houses the piezoelectric elements is made of insulating resin to reduce the number of parts, and the piezoelectric elements can be electrically connected in parallel to each other. Get the generator.

[Brief explanation of drawings]

Figure 1 is a front sectional view showing a reference example of a high voltage generator, Figure 2
The figure is a side view with the metal washer removed, Figure 3 is an exploded perspective view, Figure 4 is a front sectional view showing an embodiment of the present invention, Figure 5 is a side view with the metal washer removed, and Figure 5 is a side view with the metal washer removed. FIG. 6 is an exploded perspective view. 1... Main body case, 2... Operation member storage section, 3... Piezoelectric element storage section, 4...
Pad, 5A, 5B...Piezoelectric element, 6...
...High voltage extraction electrode, 7...High voltage lead wire, 8.
...Male screw, 9...Metal washer, 11...
...Operating member, 14...Hammer, 15...
Curved impact spring, 16... Return spring, 20, 20A
...Ground hole, 21 ...Metal rod, 30
...Guide groove.

Claims (1)

[Scope of utility model registration request] A pad and two piezoelectric elements are provided in the piezoelectric element housing part of the insulating main body case, and a male screw is formed on the outer periphery of the opening of the piezoelectric element housing part to screw a metal washer, and an operating member of the main body case is provided. In a high voltage generator in which an operating member is slidably provided in a housing part, a ground hole is formed in the axial direction of the piezoelectric element in the main body case, and the ground hole is formed on the outer periphery of the opening in which the male screw is formed. A high voltage generator characterized in that an extended guide groove is formed, and a metal rod that electrically connects the return spring provided in the operating member housing and the metal washer is inserted into the ground hole from the guide groove. Device.