JPH0897058A - Case of ignitor - Google Patents

Abstract

PURPOSE: To enable an ignitor case to cope easily with various optional specifications by a method wherein a box-like main case where a printed board is housed and a transformer case which houses a step-up transformer as linked to the rear of the main case are combined in a freely replaceable manner for use. CONSTITUTION: A main case 10 is a bottomed box-like case where a printed board P is housed, a rear partition wall 14 is set lower than lateral side walls 13 and a front wall 12 in height. The main case 10 houses the printed board P, a grounding piece 17 is fixed to the main case 10 through the intermediary of a slit 15b provided to a mounting leg 15, and the one end of the grounding piece 17 is soldered to the printed board P. On the other hand, a transformer case 20 houses a step-up transformer T and is filled with filter nearly to capacity making its opened front face upwards and rear high-voltage outputs 24 face downwards. When the filter inside the transformer case 20 is hardened, the case 20 is linked to the main case 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an igniter case for accommodating an igniter for igniting a gas burning appliance or an oil burning appliance by electric sparks.

[0002]

2. Description of the Related Art An electric igniter that ignites by using an electric spark is widely used for gas combustion equipment and oil combustion equipment.

This is a self-propelled multi-vibrator type printed circuit board that generates an oscillating current of large energy, and an oscillating current from the printed circuit board is supplied to the primary side to output a high voltage of several tens kV to the secondary side. It is combined with a step-up transformer. The high voltage generated by the step-up transformer is guided to the needle electrode arranged near the combustion section through the output lead wire to generate an electric spark for ignition.

[0004] A conventional igniter is usually constructed by housing a printed circuit board and a step-up transformer in an integral case and filling a filler such as an epoxy resin inside. This is because the filler can seal the charged portion and effectively prevent insulation deterioration due to dust or moisture.

[0005]

According to the prior art, since both the printed circuit board and the step-up transformer are housed in a single case, the case becomes large and the filling amount of the filler is unduly large. In addition, there is a problem that it is difficult to properly deal with a large number of option specifications. That is, the igniter is required to have various optional specifications depending on the electrical specifications such as the voltage value and the energy amount of the high voltage output and the mechanical specifications such as the number of poles and the position of the output lead wire. The option can be realized by combining a predetermined step-up transformer on a common printed circuit board. However, if the printed circuit board and the step-up transformer are housed in an integral case, the case at that time must be different for each option specification or must be a large one common to all options.

In addition, in the case of such a large volume,
There is also a problem that when the filler is filled, the curing time becomes long and it is extremely difficult to handle.

Therefore, an object of the present invention is to easily cope with various optional specifications by combining a main body case for accommodating a printed circuit board and a transformer case for accommodating a step-up transformer and combining them. It is to provide a case for an igniter that can be handled and is extremely easy to handle.

[0008]

The structure of the present invention for achieving the above object comprises a box-shaped main body case for accommodating a printed circuit board, and a transformer case for accommodating a step-up transformer and connecting it to the rear part of the main body case. The gist is to combine and exchange.

The transformer case can be filled with a filler.

Further, a transformer case can be connected to the main body case and filled with a filler, and a partition wall lower than other side wall walls can be provided at the rear part of the main body case.

On the other hand, mounting legs may be formed on the main body case, and at least one of the mounting legs may be capable of mounting a grounding metal.

[0012]

According to the structure of the present invention, the transformer case can be selected so that it fits the step-up transformer housed inside and can be combined with the main body case. It is possible to correspond.

When the transformer case is filled with the filler, the filler can easily realize the insulation performance required for the step-up transformer, and when the body case is filled with the filler, the filler is Isolate the printed circuit board from the outside air,
It is possible to effectively prevent performance deterioration due to adhesion of dust and the like.

When a low partition wall is provided at the rear of the main body case, the transformer case is connected and then the main body case is filled with a filler so that the filler that overflows from the main body case beyond the partition wall is filled into the transformer case. It is possible to smoothly inflow, and it is possible to further enhance the integrity of the main body case and the transformer case. The filler used to fill the main body case and the transformer case may be epoxy resin, urethane resin, or the like.

If the mounting legs are formed on the body case, the whole can be fixed to any mounting location by using the mounting legs. By mounting the grounding metal on the mounting legs, the entire electric grounding can be easily performed. You can take

[0016]

Embodiments Embodiments will be described below with reference to the drawings.

The case for the igniter is the main body case 10.
And a transformer case 20 are combined (FIG. 1).

The body case 10 is a box-shaped container body having a bottom for accommodating the printed circuit board P (FIGS. 1 and 2) and is integrally formed of a suitable insulating hard plastic material. The body case 10 includes a bottom wall 11, a front wall 12,
It has left and right side walls 13 and 13 and a rear partition wall 14. The front wall 12 has step portions 12a and 12b formed in two steps, and the rib 1 is provided at the center of the lower step portion 12b.
2c is erected. Further, the rear partition wall 14 is lower than the left and right side walls 13, 13, and the front wall 12, and the partition wall 14 and the upper side of each side wall 13 have a step for installing the printed circuit board P. Stepped portions 14a and 13a having the same height as the upper surface of the portion 12b are formed. Further, projections 14b and 14b, which serve as guides when the printed circuit board P is mounted, are provided at the upper end of the rear partition wall 14, and the inner side surfaces of the projections 14b and 14b are formed as slopes. There is.

The printed circuit board P is housed in the main body case 10 so that the electronic components P1, P1 ... On the front side are on the lower side and the pattern surface on the back side is on the upper side. The input terminals Pa and Pa are projected on both sides of the rib 12c on the stepped portion 12b through slits formed in the stepped portion 12b. Also, mounting legs 15 and 16 are provided on the left and right sides of the rear portion of the main body case 10, and one of the mounting legs 15 is used for inserting a grounding metal fitting 17 in addition to the mounting round hole 15a. A slit 15b is formed (FIGS. 1 and 3), and the other mounting leg 16 has
An elongated hole 16a for mounting is formed that opens toward the outside. However, the slit 15b is used for bending and mounting the tongue-shaped grounding metal fitting 17 whose one end is soldered to the printed board P (FIG. 3). A mounting hole 17a is formed at the other end of the grounding fitting 17 corresponding to the round hole 15a, and the grounding fitting 17 extends along the surface of the mounting leg 15.

On the inner surfaces of the rear end portions of the bottom wall 11 and the side walls 13 and 13, along the outer surface of the partition wall 14, fitting grooves 11a and 13 are formed.
a, 13a and fitting ribs 11b, 13b, 13b are formed in parallel (FIGS. 1 and 4). Further, a deep recess 11c is formed in a part of the bottom wall 11 (FIG. 2), and the recess 11c penetrates the bottom wall 11 through a small-diameter air vent hole (not shown). And

The transformer case 20 is a container body having an open front surface for housing the step-up transformer T (FIGS. 1 and 2). The step-up transformer T includes primary terminals Ta and T composed of bent pins.
a is attached, and the primary side terminals Ta, Ta, and the like project downward from the open portion of the front surface of the transformer case 20.

The transformer case 20 is integrally formed of an insulating hard plastic material. The transformer case 20 has a bottom wall 21, left and right side walls 22, 22, and an upper wall 23, and the rear portion is formed in a deformed shape that fits the outer shape of the step-up transformer T. Cylindrical high-voltage output parts 24, 24 are projectingly formed on both sides of the rear part of the transformer case 20, and the output terminal Tb of the step-up transformer T composed of a linear pin
Each Tb is projected inside the corresponding high-voltage output section 24. Therefore, the output lead wire not shown is
By inserting into the high-voltage output units 24, 24, they can be connected to the output terminals Tb, Tb.

Fitting grooves 21a, 22a, 22a and fitting ribs 21b, 22b, 22b are formed in parallel on the outer surfaces of the front ends of the bottom wall 21, the left and right side walls 22, 22 (FIG. 1, FIG. 1). 4). However, the fitting ribs 21b, 22b, 22b
Are the fitting grooves 11a and 13 on the body case 10 side, respectively.
a, 13a, fitting groove 21a, 22a, 22a
Are fitting ribs 11b, 1 on the main body case 10 side, respectively.
3b and 13b are suitable.

Therefore, in the transformer case 20, the fitting ribs 22b and 22b are made to correspond to the fitting grooves 13a and 13a, and the fitting grooves 22a and 22a are made to correspond to the fitting ribs 13b and 13b. On the other hand, they can be integrally connected by sliding them from above (FIGS. 2 and 4). At this time, at the final stage of the coupling, the fitting ribs 21b and 11b are respectively fitted into the fitting groove 11
It is possible to complete the connection of the transformer case 20 and the main body case 10 by fitting them into the a and 21a. Further, the primary side terminals Ta, Ta ... Of the step-up transformer T are inserted into the eyelets Pb, Pb ... for output of the printed circuit board P at their tips (FIGS. 1 and 2) and soldered at the eyelets Pb, Pb. By attaching it, the printed circuit board P and the step-up transformer T can be electrically connected.

The main body case 10 and the transformer case 2
0 connects both after completing each individually. That is, the main body case 10 accommodates the printed circuit board P, mounts the grounding metal fitting 17 through the slit 15b of the one mounting leg 15, and solders one end to the printed circuit board P. On the other hand, the transformer case 20
The step-up transformer T is stored and the front open part is turned up.
With the rear high-pressure outputs 24, 24 facing down, fill the filler EX until it is almost full (FIG. 2). At this time, the step-up transformer T has a rib T on the end surface of the bobbin T1.
By forming the rib 1a and engaging the rib T1a with the positioning ribs 22c, 22c formed on the inner surface of the side wall 22, it is possible to stably store the rib T1a in the transformer case 20.

When the filler EX in the transformer case 20 is sufficiently hardened, the transformer case 20 is connected to the main body case 10, and the primary side terminals Ta, Ta ... Of the step-up transformer T are connected to the eyelets Pb, Pb. Solder. Thereby, the electrical connection between the printed circuit board P and the step-up transformer T can be completed, and subsequently, the main body case 10 is filled with the filler UX. At this time, since there is an air vent hole in the bottom wall 11 of the main body case 10, the filler U
X can also fill the space below the printed circuit board P, and part of it will flow into the transformer case 20 over the low partition wall 14, and between the surface of the filler EX and the partition wall 14. The space can also be filled (Fig. 2).

After the filler UX is hardened, it undergoes a predetermined inspection process to obtain a finished product. In addition, this is the mounting leg 15,
It can be fixed to any mounting location using 16
At this time, stable grounding can be achieved by tightening the grounding metal fitting 17 together using the mounting screws on the mounting leg 15 side. Further, the entire electric system is as shown in FIG. 5, for example.

In the above description, when the output lead wire has only one pole instead of two poles (FIG. 6), the transformer case 20 is provided with only the high voltage output section 24 on the right side or the left side in FIG. Just do it. The position of the high-voltage output unit 24 at this time may be designated on the right side or the left side. Therefore, in order to meet such optional specifications, several types of step-up transformer T and transformer case 20 are prepared with the relational dimension with the main body case 10 being constant, and the step-up transformer T and transformer case 2 are prepared according to the option specifications.
It is possible to select 0 and combine it with the main body case 10. That is, the transformer case 20 is exchangeably combined with the main body case 10 in accordance with optional specifications.

The mounting legs 15 and 16 may have the same shape, and at this time, the grounding fitting 17 may be attachable to both.

[0030]

As described above, according to the present invention, by combining the main body case and the transformer case that is exchangeably connected to the rear portion of the main body case, many optional specifications accommodate the step-up transformer. Since it can be realized by selecting a transformer case and combining it with the main body case, it can easily correspond to various optional specifications.Because the main body case and the transformer case are separate, It has an excellent effect that it can be easily handled.

[Brief description of drawings]

FIG. 1 is an overall exploded perspective view

FIG. 2 is an explanatory view corresponding to a vertical section of FIG.

3 is an enlarged cross-sectional view taken along line XX of FIG.

FIG. 4 is an enlarged explanatory view of a main part of FIG.

[Figure 5] Electrical system diagram

[Fig. 6] Electrical diagram of main parts

[Explanation of symbols]

 P ... Printed circuit board T ... Step-up transformer EX, UX ... Filler 10 ... Main body case 13 ... Side wall 14 ... Partition wall 15, 16 ... Mounting leg 17 ... Grounding fitting 20 ... Transformer case

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 3, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

Claims (6)

[Claims] 1. A case for an igniter in which a box-shaped main body case for accommodating a printed circuit board and a transformer case for accommodating a step-up transformer and connected to a rear portion of the main body case are exchangeably combined. 2. The case for an igniter according to claim 1, wherein the transformer case is filled with a filler. 3. The case for an igniter according to claim 2, wherein the transformer case is connected to the body case and is filled with a filler. 4. The case for an igniter according to claim 3, wherein a partition wall lower than other side wall is provided at a rear portion of the main body case. 5. The igniter case according to claim 1, wherein a mounting leg is formed on the main body case. 6. The case for an igniter according to claim 5, wherein at least one of the mounting legs is capable of mounting a grounding metal.