JPH0249489Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to a piezo lighter that generates high voltage by hitting a piezoelectric element with a hammer, and is inserted into an insertion hole from the tail end of an insulating case. The outer periphery of the two piezoelectric elements is molded with a resin material before insertion, and the pole fittings at each outer end of the mold are joined by a ground plate to form a single unit, simplifying assembly.

(Prior Art) It is well known that insertion holes for two piezoelectric elements are provided on the tail end side of an insulating case in which a hammer is slidably provided. Each piezoelectric element is bonded to the inner circumferential wall of the insertion hole using adhesive resin. In addition, the terminal fittings of each of the two piezoelectric elements must be insulated to ground the high voltage generated when struck by a hammer. A grounding hole parallel to the piezoelectric element insertion hole is provided in the case, and a grounding spring is inserted into this hole.

(Problems to be solved by the invention) Conventional piezo lighters have the structure clarified by the publications and explanations mentioned in the previous section, so it is not necessarily easy to assemble them into an insulating case.
Mass production requires many resin adhesive injection devices and parts supply jigs necessary for assembly, and there are many problems that need to be improved.

(Means for Solving the Problems) The present invention aims to solve the problems of the conventional piezo lighter described above, and consists of a terminal plate sandwiched between the inner end surfaces and a terminal metal fitting at each outer end. The outer periphery of the two piezoelectric elements joined together is molded with a resin material with the connecting portion of the electrode terminal plate exposed, and a locking protrusion is integrally formed on the outer periphery of the mold, and the outer periphery of the mold is further molded with a resin material. A piezoelectric element unit is connected to the ground plate and both ends thereof are connected to the above-mentioned pole fittings.The insulating case, in which the hammer is slidably provided, has an insertion hole for the piezoelectric element unit on the tail end side, and the A concave groove that fits into the locking protrusion is formed, and the piezoelectric element unit is made non-rotatable in the insertion hole of the groove, and a connection portion of the terminal plate of the unit is provided on the side of the insulating case. A cup-shaped metal block inserted into the lead wire insertion hole and screwed onto the tail end of the insulating case is pressed against one pole fitting of the unit to fix the piezoelectric element unit to the insulating case. Thus, two piezoelectric elements, etc. are placed as a unit using a ground plate, and assembly is simplified.

(Example) Embodiments of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 in the figure is an insulating case in which a hammer sliding hole 2 is formed on the head end side at the right end in the figure, and an insertion hole 3 for the piezoelectric element unit is provided at the tail end side at the left end in the figure. A through hole 4 is formed in the partition wall at the boundary between the insertion hole 3 and the insertion hole 3, and grooves 5 are formed at angular intervals of 90° on the peripheral wall surface of the insertion hole 3.
is provided at one end. The outer circumferential wall at the tail end of the insertion hole 3 forms a part of the insulating case, and a screw 6 is provided on the outer circumference thereof. A lead insertion hole 7 is provided on the side of the insulating case 1 and communicates with the insertion hole 3 at right angles, and a caulking projection 8 is provided around the wall of the hole 7.

3 and 4 illustrate the piezoelectric element unit 9, in which two piezoelectric elements 10 are sandwiched between the inner ends thereof with a pole terminal plate 11, and each outer end is sandwiched with the collar part 13 of the pole fitting 12. , 10 is formed with a mold 14 made of a resin material, and from the mold 14 the terminal plate 1 is
Locking protrusions 15 that expose the connecting portion 11a of No. 1 and protrude integrally from the outer periphery excluding the connecting portion at angular intervals of 90°.
will be established. Furthermore, on the outer periphery of the mold 14,
It is formed into an upward U-shape, and a through hole 19 is provided in the protrusion piece 17 at one end to fit into one pole fitting 12 so that the circumferential surface touches the outer surface of the flange part 13, and the protrusion piece 18 at the other end.
The piezoelectric element unit 9 of FIG. 3 is constructed by applying a grounding plate 16 made of a thin metal plate that comes into elastic contact with the flange 13 of the other pole fitting 12.

Reference numeral 21 designates a cup-shaped metal block that is placed against the tail end of the insulating case 1, and forms an inner peripheral screw 22 that is screwed into the screw 5 described above.

In this embodiment, a piezoelectric element 1 is molded into an insertion hole 3 on the tail end side of an insulating case 1.
0, 10 and a ground plate 16, the rotation is restrained by the engagement of the locking protrusion 15 and the groove 6, and the pole fitting 12 at one end is inserted through the through hole 4 with a hammer. Bringing the core wire 25 of the lead inserted through the lead insertion hole 7 into electrical contact with the connecting portion 11a of the pole terminal plate 11 that protrudes into the sliding hole 2 and coincides with the inner end of the lead insertion hole 7,
The cover insulation 26 of the lead is fixed by heating and caulking the caulking protrusion 8, and the screw 22 of the metal block 21 is screwed into the screw 6 of the insulating case 1, and its inner surface is inserted into the insertion hole of the other piezoelectric element 10. It is pressed into contact with the pole fitting 12 protruding from 3 as shown in FIG. 27 is a hammer that is fitted so that it can freely slide.

(Effect of the invention) The present invention has the structure clarified from the above explanation, and includes two piezoelectric elements 10, 10 and a ground plate 16.
The piezoelectric elements 10 and 10 are not inserted into the insulating case 1 separately and parallel to each other, but instead have two piezoelectric elements 10 with a terminal plate sandwiched between the inner surfaces and a terminal fitting connected to each outer end.
The outer periphery of the piezoelectric elements 10 is molded with a resin material so as not to be separated during assembly work, and the electrode fittings at the outer ends of the molded piezoelectric elements 10 are brought into close contact with the outer periphery of the mold 14 by a grounding plate. 16 to form the piezoelectric element unit 9, and after inserting it into the insertion hole of the insulating case 1, the metal block 21 is screwed onto the tail end of the insulating case 1 to fix the piezoelectric element unit. In addition to improving the structural integrity of the structure of the relevant parts of the piezo lighter, simplifying assembly and manufacturing, and reducing manufacturing costs, the present invention also forms a groove on the inner periphery of the insulating case. However, since a locking protrusion is provided on the outer periphery of the piezoelectric element unit to non-rotatably fit into the groove, the piezoelectric element unit is rotated when the metal block is screwed to the tail end of the insulating case. There is also an effect that the connection portion of the electrode terminal plate will not be displaced from the lead wire insertion hole provided on the side of the insulating case, and the lead wire can be reliably connected to the connection portion of the electrode terminal plate.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the present invention; FIG. 1 is a longitudinal side view, FIG. 2 is a rear view cut along the line A--A in FIG. 1 with the piezoelectric element unit 9 omitted, and FIG. The partially cutaway side view shown in FIG. 4 is an exploded perspective view of the same. 1...Insulation case, 2...Hammer sliding hole, 3
...Insertion hole, 9...Piezoelectric element unit, 10,1
0... Piezoelectric element, 11... Pole terminal plate, 12...
Pole metal fittings, 14...Mold, 16...Earth plate, 21...Metal block.

Claims (1)

[Scope of utility model registration request] The outer peripheries of two piezoelectric elements 10, 10, which have electrode terminal plates sandwiched between their inner end surfaces and electrode fittings 12 joined to each outer end, are molded with a resin material with the connecting portions 11a of the electrode terminal plates 11 exposed. 14, a locking protrusion 15 is integrally formed on the outer periphery of the mold 14, and the electrode fittings at both ends are connected by a ground plate to form a piezoelectric element unit.
A piezoelectric element unit insertion hole and a recessed groove that fits into the locking protrusion are formed on the tail end side of the insulating case in which the insulating case 7 is slidably provided, and the piezoelectric element unit is inserted into the insertion hole and the recessed groove. A cup-shaped metal member that is non-rotatable and that is inserted so that the connecting part of the terminal plate of the unit is located in a lead wire insertion hole 2 provided on the side of the insulating case, and that is screwed into the tail end of the insulating case. A piezo lighter characterized in that a piezoelectric element unit is fixed to an insulating case by press-contacting a block 21 to one pole fitting of the unit.