JP7130322B2 - booster - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a booster that generates high voltage power to be supplied to spark plugs installed near a gas burner.

In order to ignite the gas burner, a part called a spark plug is arranged near the gas burner. By applying a high voltage between the spark plug and the gas burner body, spark discharge is generated between the spark plug and the gas burner. and ignites the gas emitted from the gas burner.

A booster is used to supply high voltage power to the spark plug. When dry batteries are used as power, an oscillation circuit section that oscillates low-voltage DC power from the dry batteries, and the low-voltage power oscillated by the oscillation circuit section flows through the primary coil, and a high voltage is generated from the secondary coil. A step-up device is known in which a step-up transformer for outputting electric power is housed in one case.

Since the secondary coil has a pair of output terminals, one of them is used as a ground terminal and is connected to the housing of the gas appliance, and the other is connected to the ignition plug. In order to connect the ground terminal to the housing, a fixing seat for screwing the case to the housing is provided. The ground terminal is connected to the housing via the plate-like terminal via a screw attached to the fixed seat (see Patent Document 1 and Non-Patent Document 1, for example).

Japanese Patent Application Laid-Open No. 58-11321 (earth terminal 4, Fig. 1)

RB Controls Co., Ltd., homepage, product information, high voltage unit, gas multi-igniter column (searched on April 20, 2018), Internet (http://www.rbcontrols.co.jp/product /voltage/)

6 to 8, reference numeral 100 denotes a conventional step-up device, which includes a step-up transformer 120 inside a case 101 made of resin. Further, the step-up transformer 120 is connected to a wiring board 130 on which an oscillation circuit is mounted. A step-up transformer 120 is configured to step up the AC power to a predetermined high voltage.

Low-voltage pulse power output from the oscillation circuit is supplied from the land 133 of the wiring board 130 to the primary side coil of the step-up transformer 120, and the boosted output is output from the secondary coil. The secondary coil is provided with a pair of terminals, one of which is a high-voltage terminal 121 connected to an ignition plug (not shown), and the other of which is a ground terminal 122 connected from a land 132 of the wiring board 130 to a plate-like terminal. 131.

The high-voltage terminal 121 is arranged inside the cylindrical portion 111 into which the high-voltage wire is inserted, and the plate-like terminal 131 is arranged on the upper surface of the fixing seat 112 for fixing the booster 100 with a screw. A second fixed seat 113 is provided in addition to the fixed seat 112, and the opening 103 of the case 101 becomes a fixed surface when both the fixed seats 112 and 113 are screwed. Note that this opening 103 is sealed with a resin 140 .

Since the conventional booster 100 having the above configuration employs a configuration in which the ground terminal 122 and the plate-like terminal 131 are electrically connected through the wiring board 130, the plate-like terminal 131 requires a manufacturing cost. Become. Moreover, both the plate-like terminal 131 and the ground terminal 122 are soldered to the wiring board 130, and there is a possibility that problems such as cracks may occur at the soldered portion.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a voltage boosting device that does not require a plate-like terminal and does not require soldering of a ground terminal.

In order to solve the above problems, the booster according to the present invention has a case containing a step-up transformer, one of a pair of output terminals of the step-up transformer is used as a ground terminal, and the ground terminal is connected to the outside of the case. and the lead-out portion is connected to a metal ground portion provided in the vicinity of the position where the case is fixed, wherein the step-up transformer has a resin bobbin. The ground terminal is composed of a wire rod fixed to the bobbin, and the ground terminal composed of this wire rod extends from the inside of the case to the outside of the case, and then extends to the outside of the case. A ground terminal is configured to be connected to the ground portion, and a fixing seat to which fixing metal screws are attached is provided on the outside of the case, and the ground terminal extends up to the upper surface of the fixing seat. The ground terminal is electrically connected to the ground portion through the screw by fastening the ground terminal to the ground portion together with the fixing seat when the screw is screwed to the ground portion. It is characterized by being directly connected .

According to the above configuration, the ground terminal of the step-up transformer is led out directly to the upper surface of the fixed seat, thereby eliminating the necessity of using the plate-like terminal itself and inevitably eliminating the need for soldering.

If there is only one fixed seat, the boosting device may rotate around the fixed seat. Therefore, it is desirable to form a projection for preventing the case from rotating on the outside of the case in addition to the fixed seat.

The case is opened in one direction, and the step-up transformer can be accommodated in the case and the ground terminal can be accommodated by aligning the direction of the opening with the direction parallel to the fixing surface including the fixing seat and the projection. can facilitate the derivation of

The ground terminal may be led out to the outside by passing through the case, but when the step-up transformer is housed in the case through the opening, the opening is sealed with resin, and the ground terminal is connected to the seal. It may protrude outside from the opening through the resin.

As is clear from the above description, the present invention eliminates the need to use plate-like terminals that have been used conventionally, so that the number of parts can be reduced, and reliability is improved by reducing the number of soldering points. can be increased.

A diagram showing the configuration of an embodiment of the present invention. II-II sectional view Perspective view showing the second embodiment Partial perspective view showing the third embodiment Partial perspective view showing the fourth embodiment Perspective view showing a conventional booster VII-VII sectional view Plan view showing the shape of a conventional wiring board

1 and 2, 1 is an example of a booster device according to the present invention. 2 is a case made of resin and has a step-up transformer 4 inside. Of the pair of output terminals of the secondary coil of the step-up transformer 4, the high-voltage terminal 41 is arranged in a cylindrical portion 21 formed in the case 2, and the other ground terminal 3 penetrates through the bottom of the case 2 and is connected to the outside. exposed to

The case 2 is formed with a fixed seat 22 for fixing the case 2 with a screw and a detent projection 23 for preventing the case 2 from rotating about the fixed seat 22.例文帳に追加The ground terminal 3 is arranged so as to be positioned in front of the fixed seat 22 . Therefore, when a screw is attached to the fixing seat 22, the screw tightens the ground terminal 3 and the fixing seat 22, and the ground terminal 3 is connected to the mounting base (not shown) via the screw.

The fixing surface 2A is defined by the fixing seat 22 and the protrusion 23, but the opening 2B of the case 2 is set to open in a direction parallel to the fixing surface 2A. When the step-up transformer 4 is inserted, the ground terminal 3 protrudes in the direction in which it is inserted. The opening 2B is sealed with the resin 11 after the step-up transformer and the wiring board are incorporated in the case 2. As shown in FIG. Reference numeral 20 denotes an input section to which an input terminal is attached.

By the way, in the above-described embodiment, the ground terminal 3 is provided so as to penetrate the case 2. However, instead of projecting the ground terminal 3 from the step-up transformer 4 forward in the insertion direction, the ground terminal 3 is projected rearward in the insertion direction. Alternatively, as shown in FIG. 3, the ground terminal 3 may protrude from the opening 2B, and the ground terminal 3 may be sealed with the resin 11. FIG.

Further, in each of the above-described embodiments, the case 2 is provided with the fixed seat 22 and the ground terminal 3 is positioned on the upper surface of the fixed seat 22. However, the ground terminal 3 is necessarily positioned on the upper surface of the fixed seat 22. No need.

For example, as shown in FIG. 4, a metal ground portion G provided in the vicinity of the position where the booster 1 is attached is formed with a connecting seat B that is one step higher than the surroundings. , the ground terminal 3 may be electrically connected to the ground portion G by pressing the ground terminal 3 against the connection seat B with the head of the screw that is screwed into the screw hole S.

Further, as shown in FIG. 5, a connection portion T is cut and raised in a metal ground portion G, and the ground terminal 3 is inserted into a cross-shaped connection hole C formed in the connection portion T. It may be connected to the ground portion G.

It should be noted that the present invention is not limited to the embodiments described above, and various modifications may be made without departing from the gist of the present invention.

REFERENCE SIGNS LIST 1 step-up device 2 case 3 ground terminal 4 step-up transformer 22 fixed seat

Claims (6)

A case containing a step-up transformer is provided, one of a pair of output terminals of the step-up transformer is used as a ground terminal, the ground terminal is electrically led out of the case, and the lead-out portion is In the step-up device connected to a metal ground portion provided near the position where the case is fixed, the step-up transformer has a resin bobbin, and the ground terminal is a wire fixed to the bobbin. A ground terminal made of this wire extends from the inside of the case to the outside of the case, and the ground terminal extending to the outside is connected to the ground portion , A fixing seat is provided on the outside of the case to which a fixing metal screw is attached. The ground terminal extends to the upper surface of the fixing seat, and the screw is screwed to the ground portion. A booster device, wherein the ground terminal is electrically connected to the ground portion via a screw by fastening the ground terminal together with the fixing seat to the ground portion when fixing . 2. The booster device according to claim 1 , wherein a protrusion for preventing rotation of the case is formed on the outside of the case separately from the fixed seat. 3. The booster according to claim 2 , wherein the case is open in one direction, and the direction of the opening is aligned with a direction parallel to a fixing surface including the fixing seat and the projection. Device. 3. The step-up transformer is housed in the case through the opening, the opening is sealed with resin, and the ground terminal protrudes outside from the opening through the sealed resin. 3. The booster device according to 3. A case containing a step-up transformer is provided, one of a pair of output terminals of the step-up transformer is used as a ground terminal, and the ground terminal is electrically led out of the case. In the step-up device connected to a metal ground portion provided near the position where the case is fixed, the step-up transformer has a resin bobbin, and the ground terminal is a wire fixed to the bobbin. A ground terminal made of this wire extends from the inside of the case to the outside of the case, and the ground terminal extending to the outside is connected to the ground portion, And, A female screw portion is formed near the extended portion of the ground terminal while the case is attached to the ground portion. characterized by pressingrisepressure device. A case containing a step-up transformer is provided, one of a pair of output terminals of the step-up transformer is used as a ground terminal, the ground terminal is electrically led out of the case, and the lead-out portion is In the step-up device connected to a metal ground portion provided near the position where the case is fixed, the step-up transformer has a resin bobbin, and the ground terminal is a wire fixed to the bobbin. A ground terminal made of this wire extends from the inside of the case to the outside of the case, and the ground terminal extending to the outside is connected to the ground portion, In addition, by cutting and raising a connecting portion in a metal ground portion and inserting a ground terminal into a cross-shaped connection hole formed in the connecting portion, characterized by connecting the ground terminal to the ground partrisepressure device.

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