JPH0424305Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fixing device for combustion control related parts such as spark plugs, thermocouples, flame rods, etc., which are mainly applied to table stoves and other gas appliances.

(Prior art) As shown in FIG. 9, a conventional device of this kind is
It is known that a spark plug (a) is fitted and held in a substantially U-shaped elastic claw (d) fixed to a base plate (c) at a constriction (b) formed in the longitudinally intermediate portion of the spark plug (a).

(Problem to be solved by the invention) In the case of the above-mentioned conventional device, it is preferable that the width of the constriction part b of the spark plug a and the width of the elastic claw piece b substantially match, but in reality, the relationship between accuracy and tolerance Generally speaking, the width of the elastic claw piece b is more or less smaller, which causes the spark plug b forming one of the ignition electrodes to be misaligned with the other ignition electrode. There is a problem in that the distance between the two, that is, the dimensions of the discharge gap, deviates from an appropriate value, resulting in unstable ignition.

(Means for Solving the Problems) The present invention provides a device that eliminates the above-mentioned disadvantages, and provides a constriction in which combustion control related parts such as spark plugs, thermocouples, and flame rods are formed in the longitudinally intermediate portion. In a device that is fitted into and clamped by a substantially U-shaped elastic claw piece fixed to a substrate in the section, each of both halves of the claw piece is provided with a notch located at the widthwise middle of each half. , the widthwise side pieces of each half separated by the notch are brought into elastic contact with both ends of the constriction.

(Function) The present invention has the above-mentioned configuration. According to this, when a spark plug is fitted and held in the elastic claw piece at its constriction, for example, both sides of the notch in both halves of the claw piece is pressed so as to narrow the opening of the notch, and when it is placed in the constriction of the spark plug and the pressure is released, the opening of the notch expands to its original position due to the elastic force of the claw. Since both sides of the notch come into elastic contact with both ends of the constriction, there is no possibility of misalignment of the spark plug, the dimensions of the discharge gap are always maintained at appropriate values, and ignition is always performed in a stable state. .

(Example) Next, an example of the present invention will be described based on the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a board fixed, for example, within the table stove body, and has a spark plug 2, which is a combustion control related component, on its lower surface and a protective cover 3 on its upper surface.

The substrate 1 and the protective cover 3 are overlapped with each other at least in part, and the spark plug 2 is fitted into a substantially U-shaped elastic claw piece 4 at a constricted portion 2a formed in the longitudinally intermediate portion thereof. put them together and hold them together,
The claw piece 4 is fixed at its closed end 4a to the overlapping part of the substrate 1 and the protective cover 3 with screws 5.

Although the above-mentioned configuration is not particularly different from the conventional example, in the present invention, a notch 6 is provided in each of both halves of the claw piece 4, and the notch 6 is located in the middle of each half in the width direction. Both sides of each half in the width direction are brought into elastic contact with both ends of the constricted portion 2a. In this case, the widths of both halves of the elastic claw piece 4 are made larger than the width of the constricted portion 2a.

In this case, as described in the section of the above-mentioned operation, the spark plug 2 will not be misaligned, and ignition will always be performed in a stable state.

4 to 6 show another embodiment of the present invention. In this case, a through hole 7 is provided at the overlapping portion of the substrate 1 and the protective cover 3, and the elastic claw piece 4 is attached to the closed side of the through hole 7. The end portion 4a is fixed by being inserted into the through hole 7 and engaged, and other than this point, it is not particularly different from those shown in FIGS. 1 to 3.

FIGS. 7 and 8 show still another embodiment of the present invention, in which a notch 8 is also provided in the closed side portion of the elastic claw piece 4, and both sides of the notch 8 are provided with through holes. 7, and is not particularly different from those shown in FIGS. 4 to 6 except for this point.

In the above-described embodiment, the substrate 1 includes the pilot burner 9, the gas distribution plate 10 in front of the pilot burner 9,
It is equipped with a target plate 11 facing the spark plug 2, and is not particularly different from the conventional one in this point.

Above, an embodiment has been described in which the combustion control related component is the spark plug 2, but it goes without saying that a thermocouple, flame rod, etc. may also be used.

(Effect of the invention) As described above, according to the present invention, each of the two halves of the elastic claw piece is provided with a notch located in the middle in the width direction of each half, and each half is separated by the notch. Since the pieces on both sides in the width direction of the part are brought into elastic contact with both ends of the constricted part, there will be no misalignment of the combustion control related parts in relation to the elastic claw pieces, and when the combustion control related parts are used as a spark plug. In order to maintain proper discharge gap dimensions, ignition can always be performed stably, and when a thermocouple is used as a part related to combustion control, the distance between the heat-sensitive part and the burner must be maintained appropriately, and the thermocouple must be properly ignited. The pair is heated by the burner to obtain a predetermined electromotive force, and when the combustion control related parts are made of flame rods, the distance between the tip and the burner is maintained appropriately, resulting in effects such as obtaining a predetermined flame current. has.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the first embodiment of the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a sectional view of the elastic claw portion, and Fig. 4 is a slope view of the second embodiment of the present invention. 5 is an exploded perspective view of the same, FIG. 6 is a cross-sectional view of the elastic claw piece, FIG. 7 is a perspective view of a modification of the second embodiment, and FIG. 8 is a partial view of the elastic claw piece. Side view, No. 9
The figure is a perspective view of a conventional example. DESCRIPTION OF SYMBOLS 1... Board, 2... Spark plug (combustion control related parts), 2a... Neck part, 4... Elastic claw piece, 6
...Notch.

Claims (1)

[Scope of utility model registration request] Combustion control-related parts such as spark plugs, thermocouples, flame rods, etc. are fitted into and held in approximately U-shaped elastic claws fixed to a board at a constriction formed in the longitudinally intermediate portion thereof, the claws A notch is provided in each of both halves of the piece, and the pieces on both sides in the width direction of each half separated by the notch are brought into elastic contact with both ends of the constricted part. A fixing device for combustion control related parts.