JPS6115410Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high voltage generator that generates high voltage by applying a mechanical impact to a piezoelectric element using an impactor (hammer).

This type of high voltage generator is widely used as an ignition device for gas lighters and the like.

FIG. 1 shows an example of a conventional high voltage generator.
In this case, the outer case 1 and the inner case 2 are made of metal plates, and the outer case 1 is formed with a groove 5 into which the impactor pin 4 provided on the impactor 3 housed in the inner case 2 is fitted. has been done.

However, with the configuration shown in FIG. 1, the width of the kerf 5 has to be larger than the diameter of the impactor pin 4.
Although the impactor pin 4 is biased toward the cam groove 7 of the outer case 1 due to the inclination of the cam window 6 of the inner case 2, the impactor pin 4 is biased due to slight deformation of the outer case 1. There is a risk that it may fall out from the outer case 1.

Therefore, as shown in FIG. 2, pin grooves 11 are formed in opposite corners of the opening of an outer case 10 made of synthetic resin in which the piezoelectric element unit is housed, and an inner case 13 in which the impactor 12 is housed is formed. A structure has been proposed in which the impactor pin is inserted into the opening and the impactor pin is inserted into the cam window of the outer case 1 using the pin 11.

However, in the structure shown in FIG. 2, when the impactor pin is inserted into and fixed to the impactor 12, if the protruding lengths of the left and right impactor pins are uneven, the impactor pins will protrude from the pin groove 11, making assembly impossible. For this reason, there is a drawback that the assembly yield is low.

The present invention aims to eliminate the above-mentioned drawbacks and provide a high voltage generator in which the impactor pin can be easily fitted into the outer case, there is no fear of the impactor pin coming off, and the assembly yield is good. It is something.

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

3 to 8, a piezoelectric element unit 21 is housed in an outer case 20 made of an elastic insulating material such as synthetic resin, and one end surface of the outer case 20 has a metal A washer 22 is screwed on. Further, the outer case 20 has an inner case fitting recess 23 and a coil storage recess 24 that are open on the other end surface. Further, a cam window 25 is formed on one side (narrow side) of the outer case 20, and the cam window 25 extends from a slit-like communication portion 27 that communicates with the L-shaped engagement portion 26 and the opening end surface. It is completed. A cam groove 28 communicating with the opening end surface is also formed on the inner surface of the inner case fitting recess 23 of the outer case 20 facing the cam window 25.

On the other hand, an impactor 3 is provided in the inner case 30 to be slidably fitted into the inner case fitting recess 23.
1 and an impact spring 32 that urges the impactor 31 toward the piezoelectric element unit.
1, an impactor pin 34 is inserted and fixed so as to protrude from cam windows 33 formed on opposing sides of the inner case 30, respectively. The inner case assembly 40 assembled in this way is assembled with the outer case 2.
The communication portion 27 of the cam window 25 of 0 has a width wider than the diameter of the impactor pin 34 on the inner surface side of the outer case,
Since the width on the outer surface side is narrower than the diameter of the impactor pin 34, and the communication portion 29 of the cam groove 28 is sufficiently wide, the impactor pin 34 is It is fitted into the outer case 20 by passing through the communication portions 27 and 29 of the cam window 25 and the cam groove 28 . At this time, even if the left and right protruding lengths of the impactor pins 34 are uneven, the outer case 20 can be deformed due to its elasticity as shown in FIG.
There is no problem in fitting it into the body. A coil 50 connected in series to the high-voltage lead-out line of the piezoelectric element unit 21 is housed in the coil housing recess 24 of the outer case 20, and is molded with an insulating resin 51. A high-voltage wire 52 is drawn out from the coil 50 to the outside of the outer case 20. Further, a return spring 53 is provided in the inner case fitting recess 23 of the outer case 20 to bias the inner case 30 in a direction away from the piezoelectric element unit 21.

FIG. 8 shows a state in which the high voltage generator shown in the embodiment is incorporated into the lighter case 60. After it is finally assembled into the lighter case 60, the lighter case 60 prevents the communication portion 27 of the cam window 25 formed in the outer case 20 from expanding due to elasticity, so that the impactor pin 34 There will be no omissions.

In the configuration of the above embodiment, when the inner case 30 is pressed and moved in the direction of arrow A against the return spring 53, the impactor pin 34 of the impactor 31 is moved against the outer case 20.
Since the impactor 31 is engaged with the stepped portion of the L-shaped engaging portion 26 of the cam window 25, impact energy is accumulated in the impact spring 32 without moving the impactor 31. In addition, inner case 30
If the pressure is continued, the inclined portion of the cam window 33 formed in the inner case 30 comes into contact with the impactor pin 34, and the pin 34 disengages from the stepped portion of the L-shaped engaging portion 26.
As a result, the impactor 31 strongly hits the pad of the piezoelectric element unit 21 with the energy of the impact spring 32, generating a voltage. This high voltage is taken out through the coil 50 to the high voltage REET wire 52. After the impact ends, the spring 5 is returned by releasing the pressing force of the inner case 30.
3 to return to the direction of arrow B.

As explained above, the high voltage generator of the present invention is easy to assemble, and the yield is good because variations in the left and right protruding lengths of the impactor pins are tolerated. In addition, since the impactor pin does not come off, the sliding movement between the inner case and the outer case can be performed reliably and smoothly over a long period of time.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of a conventional high voltage generator, Fig. 2 is a side view showing another example of the conventional high voltage generator, and Fig. 3 is an implementation of the high voltage generator according to the present invention. For example, a partially sectional plan view, Fig. 4 is a front view, Fig. 5 is a side view, Fig. 6 is an exploded front view, and Fig. 7 shows the impactor pin insertion process. The side view and FIG. 8 are front sectional views showing a state in which the high voltage generator shown in the embodiment is assembled into a lighter case. 1, 10, 20...outer case, 2, 13, 30
...Inner case, 3,12,31...Impactor, 4,
34... Impactor pin, 21... Piezoelectric element unit, 22... Metal washer, 23... Inner case fitting recess, 24... Coil storage recess, 25, 33... Cam window, 26... L-shape Engaging portion, 27, 29...Communication portion, 28...Cam groove, 32...Impact spring, 40
... Inner case assembly, 50 ... Coil, 51 ...
Insulating resin, 52... High voltage lead wire, 53... Return spring, 60... Lighter case.

Claims (1)

[Scope of utility model registration request] A first cam window is formed on at least one side of an outer case made of an elastic insulating material that accommodates a piezoelectric element unit, and has a communication portion that communicates with the open end surface of the outer case, and the first cam window has a communication section. The section has a width wider than the diameter of the impactor pin on the inner surface side of the outer case, and a width narrower than the diameter of the impactor pin on the outer surface side, and An impact spring and an impactor are housed in an inner case that is slidably fitted into the case, and the impactor pin attached to the impactor is mounted on a side surface of the inner case facing the first cam window. An inner case assembly that protrudes from the formed second cam window is fitted into the outer case by inserting the impactor pin into the first cam window through the communication portion. High voltage generator.