JPS6319737Y2 - - 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.

A high voltage generator using this type of piezoelectric element is
Widely used in gas lighters and other ignition devices.

FIG. 1 shows a conventional high voltage generator. In this figure, an outer case 1 is integrally formed with a partition portion 5 that separates a piezoelectric element storage portion 2 and an inner case storage portion 3 and has a hole through which a pad 4 protrudes. A metal fitting 4 and a piezoelectric element 6 are housed in the piezoelectric element housing 2, and a receiving metal 7 is screwed into an opening at one end of the piezoelectric element housing 2. Further, a high voltage lead wire 8 is bonded to the outer case 1, and a stepped cam window 9 is formed on the side surface of the inner case storage portion 3 of the outer case 1. On the other hand, a cam window 11 is formed in an inner case 10 that is slidably provided inside the inner case storage section 3, and has a pin 12 that engages with this cam window 11 and the stepped cam window 9. An impactor 13 and an impact spring 14 are housed inside the inner case 10. A return spring 15 is provided in the inner case housing portion of the outer case 1, and this urges the inner case 10 in the projecting direction (rightward direction).

In the above configuration, in the normal state, the inner case 10 protrudes as shown in FIG.
The pin 12 engages with the lower end of the stepped cam window 9. In this state, when the inner case 10 is pressed in the direction of arrow X against the elastic force of the impact spring 14, the elastic force is accumulated in the impact spring 14. Inner case 10
When pressed further, the pin 12 is disengaged from the stepped portion of the stepped cam window 9 due to the inclined side of the cam window 11.
The impactor 13 rapidly moves to the left by the force of the impact spring 14 and hits the pad 4, generating a high voltage between the high voltage lead wire 8 and the pad 7.

By the way, in the case of the above configuration, the pin 12 that engages with the cam windows 9 and 11 of the outer case 1 and the inner case 10
Since it is necessary to insert and fix the pin 12 into the impactor 13 with both cases combined, the workability during assembly is poor, and it is difficult to securely fix the pin 12 to the impactor 13. There was also a risk that the pin 12 would come off.

The present invention eliminates the above drawbacks, devises the structure of the inner case and outer case, integrates the impactor and pin in advance, allows them to be smoothly introduced into the inner case, and furthermore The present invention aims to provide a highly reliable high voltage generator that is easy to manufacture and can be easily incorporated into a case.

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

In FIGS. 2 to 8, a stepped cam window 9A of a case 1A that houses a piezoelectric element and the like has an additional notch 20 for inserting a pin. In addition, outer case 1A
An inclined portion 21 is formed at the opening end of the opening. These pin insertion additional notches 20 and inclined portions 21
This is effective when inserting the inner case 10A, which will be described later, into the inner case storage section of the outer case 1A.

On the other hand, as can be seen from FIGS. 5 and 7, the inner case 10A is a rectangular cylindrical body with an outer circumference of 30 mm on the short side.
and a long side 31, and a thick portion 32 is formed along the short side 30. As a result, pin 12
The inner side of the inner case that houses the impactor 13A having the shape A and the impact spring 14A is formed into a substantially regular square prism-shaped recess 33. Here, the cam window 11 of the inner case 10A
An additional notch 34 for pin insertion is formed in A as shown in FIGS. 3, 4, and 6, and the inner case 10
A pin passage communication groove 35 is formed in the thick walled portion 32 in the diagonal direction of the inner case so as to reach the pin insertion additional notch 34 from the open end of A. This pin passage communication groove 35 has a shape and size that allows the pin 12A integrated into the impactor 13A to pass therethrough, and in order to smoothly and easily introduce the pin 12A into the cam window 11A, A tapered portion 35A is formed at the end of the communication groove 35 that is in contact with the pin insertion additional notch 34. Further, the overall length of the pin 12A is at least longer than the short side 30, and the pin 12A needs to have a dimension that allows it to engage with the stepped cam window 9A of the outer case 1A.

As shown in FIGS. 6 and 7, the impactor 13A having the pin 12A is assembled into the inner case 10A by directing the pin 12A in the diagonal direction of the open end of the inner case 10A and inserting the pin through the communicating groove. 35 and inserting it in the direction of the cam window 11A.
As a result, when the pin 12A passes through the tapered portion 35A and reaches the pin insertion additional notch 34, it protrudes from the cam window 11A, and due to the inclination A of the cam window 11A, the pin 12A is stabilized at point P at the lower right of the cam window. This is because the impact spring 14A causes the impactor 13A to move to the sixth position.
This is because it is biased downward in the figure.

To assemble the inner case 10A having the impactor 13A and the like into the outer case 1A, as shown in FIG. This is done by fitting the inner case 10A into the case housing and pushing it in the direction of arrow Y. This pushing operation moves the pin 12A to point Q, that is, the seventh
The inner case rotates diagonally in the figure (however, it does not rotate to the point where it coincides with the communicating groove 35 for pin passage), and the pin 12A no longer protrudes from the inner case 10A, and the inner case 10A is moved to the outer case 1A. It can be inserted deeply. When the pin 12A reaches the pin insertion additional notch 20, it engages with the stepped cam window 9A and stabilizes at point R. This results in
As shown in FIG. 2, the inner case 10A is slidably fitted into the outer case 1A, and the pin 12A is connected to the cam window 9A.
It is in the completed state where it is engaged with 11A.

Note that the other configuration may be the same as that in FIG. 1, and the operation of striking the piezoelectric element with the impactor 13A is also the same.

According to the above embodiment, the inner case 10A is formed in a diagonal direction of the inner case 10A, which is a rectangular cylindrical body and has an outer periphery consisting of a short side 30 and a long side 31, and has a thick wall portion 32 along the short side 30. Since the pin 12A can be guided to the cam window 11A using the pin passage communication groove 35, it can be assembled into the inner case 10A even if the pin 12A is integrally fixed to the impactor 13A in advance. Further, the pin 12A can be smoothly introduced into and projected from the cam window 11A by the tapered portion 35A formed at the end of the communication groove 35 for passing the pin.
The impactor 13A can be easily assembled. Furthermore, the assembly of the inner case 10A and the outer case 1A can be performed separately, which is advantageous in terms of the assembly process. That is, outer case 1A and inner case 10A
In the combined state, the work of inserting a pin into the impactor can be eliminated, making manufacturing and assembly easier. Furthermore, there is an advantage that it is not necessary to provide a special groove, notch, etc. in the outer case 1A for the pin 12A to pass through. In addition, it is easy to securely fix the impactor 13A and the pin 12A, which eliminates the possibility of deterioration of characteristics due to loosening of the pin and malfunction due to the pin falling out, and improves reliability. can.

Note that the structure of the impactor 13A having the pin 12A is one in which the pin is inserted into the impactor and fixed by caulking, or one in which the impactor is cut from a cylindrical body and the pin is cut out integrally to protrude. , one in which a pin is press-fitted into a recessed portion of the impactor and integrated, one in which a pin is formed by applying press processing to the impactor, etc. can be used. Moreover, a stepped cam groove may be formed instead of the stepped cam window of the outer case 1A.

As explained above, according to the high voltage generator of the present invention, the inner case that houses the impactor etc. is constituted by a rectangular cylindrical body whose outer periphery consists of a short side and a long side, and An additional notch is provided in the cam window, and a communication groove for passing the pin is formed in the inner case that reaches the additional notch from a diagonal position of the opening end of the inner case, so that the impactor and the pin can be integrated in advance. It can be integrated into the inner case. Further, since a tapered portion is formed at the end of the communication groove for passing the pin in contact with the inner case side cam window, the pin integrated with the impactor can be smoothly introduced into the cam window. Furthermore, the opening end of the outer case is rotated in the diagonal direction of the inner case where the pin passage communication groove is located so that the pin of the impactor after being assembled into the inner case does not protrude from the outer surface of the inner case. Since a tilted portion is formed to allow movement, the work of assembling the inner case into the outer case can be facilitated.

[Brief explanation of drawings]

Fig. 1 is a side sectional view showing a conventional high voltage generator, Fig. 2 is a side view of main parts showing an embodiment of the high voltage generator according to the present invention, and Fig. 3 shows an inner case used in the embodiment. The main part side view shown in Fig. 4 is - of Fig. 3.
5 is a bottom view of the same, FIG. 6 is a side view of essential parts for explaining the operation of assembling the impactor into the inner case in the embodiment, FIG. 7 is a bottom view of the same, and FIG. 8 is an external view. FIG. 6 is a side view of main parts for explaining the operation of assembling the inner case into the case. 1,1A...outer case, 6...piezoelectric element, 9,
9A...Stepped cam window, 10,10A...Inner case, 11,11A...Cam window, 12,12A...
Pin, 13, 13A...Impactor, 14, 14A...
...Impact spring, 15... Return spring, 20, 34...
Additional notch for pin insertion, 21... Inclined part, 30...
...short side, 31...long side, 32...thick part, 35...
...Communication groove for pin passage, 36A...Tapered part.

Claims (1)

[Scope of utility model registration request] A cam window or a cam groove is provided in an outer case having a piezoelectric element, an inner case having a cam window is provided slidably inside the outer case, and the cam window or cam groove of the outer case and the cam window of the inner case are provided. An impactor having a pin that engages with the piezoelectric element and an impact spring that biases the impactor toward the piezoelectric element are provided inside the inner case, and a return spring that biases the inner case in the projecting direction is provided inside the outer case. In the high voltage generator provided in the high voltage generator, the inner case 10A is constituted by a rectangular cylindrical body whose outer periphery consists of a short side and a long side, and an additional notch 34 is provided in the cam window 11A of the inner case,
A pin passage communication groove 35 that reaches the additional notch 34 from a diagonal position of the opening end of the inner case is formed in the inner case, and the pin passage communication groove 35 is formed at the end in contact with the cam window 11A with the Cam window 11A
Tapered portion 3 in the direction in which the pin 12A is introduced
5A and rotates the inclined portion 21 in the diagonal direction of the inner case where the pin passing communication groove 35 is located so that the pin 12A does not protrude from the outer surface of the inner case 10A. A high voltage generator characterized in that it is formed at an open end of.