JP2001074241A - Cap assembling structure of ignition device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap assembling structure of an ignition device to prevent weakening of a hook locking effect even when an external force, such as an impact load, is exerted. SOLUTION: This device is constituted such that a tip 3a and air introduction ports 3b are opened, a hole 51 for locking a hook is formed in a cap 3 for a press product forming a discharge electrode and having a mating surface 50 formed on a side, an elastic hook 53 is situated at the tip of a body case 2, and by mounting the cap 3 on the tip part of a body case 2 from an axial direction the elastic hook 53 of the body case 2 is engaged with the hole 51 of the cap 3 for hook-locking. Further, protrusion parts on the edges, positioned opposite to each other, of the both sides of the mating surface 50 of the cap 3 are folded inward in a manner to be laminated with each other to form claws 52. A groove 54 engaged with the claw 52 of the cap 3 is formed in the body case 2 side, the claw 52 is inserted in the groove 54, and the mating surface 50 is prevented from spreading.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap assembling structure for an ignition device, and more particularly to a structure in which the effect of hooking is not weakened even when an external force such as an impact load is received.

[0002]

2. Description of the Related Art Conventionally, as an ignition device suitable for igniting fireworks or the like, a gas tank is provided at one end of an elongated device main body as described in Utility Model Registration No. 2573995, and a gas tank is provided above a gas tank. A valve mechanism for opening and closing the passage is provided, and a gas passage extends from the valve mechanism to the other end of the apparatus main body, an injection nozzle is disposed at the tip thereof, and a lever-type operation button operable from outside. A piezoelectric unit for supplying a discharge voltage in conjunction with the piezoelectric unit is provided, and a lever mechanism for opening a valve mechanism in conjunction with the power supply operation of the piezoelectric unit is provided. The piezoelectric unit operates by an operation of an operation lever from outside. In conjunction with the operation of the piezoelectric unit, the valve mechanism opens a gas passage to eject fuel gas from the injection nozzle, and the piezoelectric unit generates a discharge voltage, thereby A portable rod-shaped ignition device or ignition rod has been developed in which pressure is applied between a discharge terminal provided near the injection nozzle and a nozzle tip at the tip of the injection nozzle to ignite the ejected fuel gas. I have.

[0003] In the case of the ignition rod described in the above publication, a crater through which a flame passes is opened at the tip of an extension formed of a metal cylinder engaged with the main body of the apparatus, and an air inlet is opened on the side of the rear. Also, a discharge electrode is formed by cutting and raising a part of the cylindrical body inward, and separately from that, a discharge electrode is formed by having a crater and an air inlet and partly cut and raised inside. Conventionally, an ignition device such as an ignition rod having a structure in which a cap is assembled to an apparatus body is also known.

[0004] In a conventional assembling structure in which the cap is assembled to the apparatus main body, an elastically deformable hook portion is provided on a side surface of the cap, and the hook portion is fitted into a concave portion of the apparatus main body. There is a device in which an elastically deformable hook portion is provided on the device body side, and a cap is fixed to the device body by a hook stopper mechanism having a hole on the cap side to engage with the hook portion. In some cases, the cap is assembled to the apparatus main body by a multi-stage wedge fitting that cannot be disassembled.

[0005]

The cap to be assembled to the main body of the ignition device is generally a pressed product,
It is common to have seams on the sides. In that case, in the assembly structure having only the above-mentioned conventional hook stopper structure, when a strong impact load such as a drop impact is applied from the outside, the seam of the pressed product may be widened, and the seam is widened. There is a problem that the effect of hooking stops and the cap comes off.

In addition, a fitting type other than the hook stopper is generally difficult to assemble, and if it cannot be disassembled, it is difficult to correct it in a manufacturing process, resulting in an increase in cost.

It is therefore an object of the present invention to provide a cap assembling structure for an ignition device in which the effect of hooking is not weakened even when an external force such as an impact load is applied.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a cap assembling structure for an ignition device in which a cap having a joint at a side portion is attached to a tip of an apparatus body and fixed by a hook fixing mechanism. The protruding portions formed on the opposing edges on both sides of the device are folded inward to provide a claw portion which is overlapped, and the claw portion is locked to the apparatus main body, and the protruding portions on both sides constituting the claw portion are provided. A groove for preventing separation is provided.

For example, the above-described structure includes a gas tank for storing a fuel gas, a valve mechanism for opening and closing a gas passage from the gas tank, and a fuel arranged at a front end in the longitudinal direction of the apparatus and supplied from the valve mechanism through an extension passage. A nozzle having a fuel injection nozzle and an ignition mechanism for igniting the fuel gas injected from the injection nozzle is provided on the main body of the apparatus, and a cap having a joint at a side portion is attached to a tip of the main body of the apparatus and fixed by a hooking mechanism. It is preferable to apply the present invention to the cap assembling structure of the igniter.

[0010] In the above structure, it is preferable that the hook fixing mechanism is constituted by, for example, an elastic hook provided on a side portion of the apparatus main body and a hole provided in the cap so as to engage with the elastic hook. .

According to the present invention, since the protrusions on both sides constituting the claw portion of the cap are prevented from being separated from each other by the groove of the apparatus main body, a strong impact load such as a drop impact or other external force is applied. Also, the seam of the cap does not widen, the effect of hooking is maintained, and the cap is prevented from coming off.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 7 show an embodiment of the present invention applied to an ignition rod. 1 to 3 show the entire structure of the ignition rod, FIG. 4 shows an assembling procedure, and FIG. 5 shows a structure of the cap. 6 and 7 show a cap assembling structure.

The ignition rod (ignition device) indicated by 1 in FIG. 1 is designed for a Buddhist altar, and a cap 3 is provided at the tip of a split main body case 2 composed of a shell-shaped front case 2a and a back case 2b. The bottom plate 4 is assembled to the bottom. A pressing lever-type operation button 5 operated in a direction intersecting with the longitudinal direction of the apparatus is provided so as to travel through a hole at the top of the back case 2b. A lock member 6 for locking the end of the operation button 5 on the pressing portion side.
Are slidably mounted on the wall of the back case 2b. A rib-shaped guard wall 7 is formed so as to surround three sides of the operation button 5 except for the end on which the finger is placed.

Inside the main body case 2, a gas tank 10 for storing fuel gas is provided on the bottom side. The gas tank 10 has a bottomed cylindrical tank body 11 made of a molded product made of a synthetic resin, and is hermetically fixed to an upper surface of the tank body 11 while holding a valve mechanism 20 to be described later. A synthetic resin upper lid 13 constituting a tank chamber 12 in which fuel gas is stored, and a synthetic resin bracket fitted to the upper surface of the upper lid 13 while holding a piezoelectric unit 40 described below and supporting a rotating lever 43 It consists of 14 and.

The upper lid 13 of the tank body 11 has a gas tank 10
A valve mechanism 20 that opens and closes the gas passage from the engine to control the supply and cutoff of fuel gas and the amount of fuel gas ejected
Is held. The valve mechanism 20 has a structure known per se, and a gas holder and a nozzle bottom 23 forming a valve seat are fitted airtightly with a wick holder 22 holding a wick 21 for sucking up liquid fuel gas from the gas tank 10 interposed therebetween. The nozzle screw 24 is mounted on the top of the nozzle bottom 23, and the nozzle screw
A nozzle member 25 is provided penetrating through the nozzle member 24. The lower end of the nozzle member 25, on which the valve rubber is mounted, reaches the valve seat position of the nozzle bottom 23, is urged toward the valve seat of the nozzle bottom 23 by a nozzle spring 26 arranged inside the nozzle screw 24, and the upper part is It is inserted and supported by a joint 27 fixed to the partition wall of the main body case 2. In the nozzle member 25, the valve rubber at the lower end is normally set at the bottom of the nozzle by the urging force of the nozzle spring 26.
Close the gas passage by sitting on the 23 valve seat. Then, the gas passage is opened by the rotation lever 43 described later lifting the nozzle member 25. Further, the main body case 2 is extended from a ring screwed and fitted around the tip of the nozzle screw 24.
By moving the flame adjusting knob 28 protruding to the outside from the hole formed in the split fitting portion, the nozzle screw 24 rotates, and the ejection amount is adjusted.

At the end of the main body case 2, a nozzle holder portion 29 having a structure divided in half into a front case 2a and a rear case 2b is provided.
The injection nozzle 30 is disposed in the nozzle holder 29 so as to extend outward from the tip. Then, the joint 27 is supplied so that the fuel gas is supplied from the valve mechanism 20 to the injection nozzle 30.
A gas pipe 31 is disposed between the gas nozzle 31 and the injection nozzle 30. In addition, a heat insulating ring 32 with a slit for enhancing the ignitability by discharge ignition and protecting the nozzle holder 29 from ignition heat is provided on the nozzle holder 29.
It is arranged so as to surround the tip of. This insulation ring 32
Also, the front case 2a and the back case 2b are fixed at the distal end side by fitting into the nozzle holder portion 29, which is divided in half into the front case 2a and the back case 2b. In addition, as described later, the front case 2a and the back case 2
b is further fixed by the bottom plate 4 on the bottom side.

A piezoelectric unit 40 is provided inside the main body case 2. The piezoelectric unit 40 has a structure known per se for supplying a discharge voltage, is held by the bracket 14 of the tank body 10, and slides via the lever 41 with the pressing operation of the operation button 5. It is configured to generate a discharge voltage when 42 is depressed.

The bracket 14 of the tank body 10 also includes
A substantially L-shaped rotating lever 43 for opening the valve mechanism 20 and ejecting the fuel gas in conjunction with the piezoelectric unit 40 is supported. The mechanical holder 42 of the piezoelectric unit 40 is provided with a lever for rotating the nozzle member 25 in a direction to lift the nozzle member 25 by pressing the rotary lever 43 when the mechanical holder 42 is pressed down in conjunction with the pressing operation of the operation button 5. Push 44 is attached.

The operation button 5 is connected to the back case 2 as described above.
b It was arranged in a way to go on a business trip from the hole at the top, and link 41
And a pair of left and right pins 5a, 5
b is supported by a fulcrum, and the other end pressing portion is rotated by being pressed in a direction intersecting with the longitudinal direction of the device, and the link 41 is rotated.
Is configured to push down the mechanical holder 42 of the piezoelectric unit 40 via the. Further, a lock position for entering the lower end of the operation button 5 on the pressing portion side to prevent the pressing operation of the operation button 5, and a pressing operation of the operation button 5 being disengaged from the lower end of the pressing portion side of the operation button 5. As described above, the lock member 6 is mounted so as to be slidable across the wall surface of the back case 2b so that the lock member 6 can be switched to the lock release position that allows the lock.

The cap 3 is disposed so as to surround the heat insulating ring 32 protruding from the tip of the main body case 2.
It is formed of a metal pressed product, and is fitted to the tip of the main body case 2 in a hooking manner. A crater 3a through which a flame passes is opened at the center of the front end face of the cap 3, and a plurality of air introduction ports 3b are opened at the side and the rear side of the cap 3, and a part of the cap is cut and raised inside the front. A discharge electrode 45 is provided. The cap 3 is provided with a hole 51 for hooking, as described later, and a claw 52 for preventing the joint from spreading.

The bottom plate 4 is pushed into a stepped space formed at the bottom of the main body case 2 and has a hook structure to form the front case 2.
a and the back case 2b are sandwiched and fixed.

The lever push 44 attached to the mechanical holder 42 of the piezoelectric unit 40 also serves as one electrode terminal of the discharge voltage, and the turning lever 43 is formed of a conductive resin, and turns from the lever push 44. Nozzle member via lever 43
It is electrically connected to the joint 27 through 25. A conductive wire (not shown) is provided between the joint 27 and the injection nozzle 30 at the end of the apparatus, and the injection nozzle 30 can be energized through the joint 27. Further, a plus terminal 46 is provided on the main body case 2 so that the other electrode of the discharge electrode is electrically connected to the cap 3. One end of the ground plate 46 is in contact with the electrode terminal exposed to the mechanical holder 42 of the piezoelectric unit 40 at one end inside the main body case 2, and the other end of the cap 3
Is bent out of the main body case 2 so as to be fitted inside. In this way, one of the poles is electrically connected to the injection nozzle 30, and the other is electrically connected to the discharge electrode 45 formed on the cap 3, so that the two electrodes of the piezoelectric unit 40 are electrically connected.

When the operation button 5 is pressed down with a finger, the link
The mechanical holder 42 of the piezoelectric unit 40 is pushed down via 41. Then, the lever push 44 moves in accordance with the pushing movement of the mechanical holder, and the rotating lever 43 pushed by the lever push 44 lifts the nozzle member 25, whereby the valve mechanism 20 opens and the vinyl hose 31 is opened. After that, the fuel gas is ejected from the injection nozzle 30. In addition, a discharge voltage is generated in the piezoelectric unit 40 with the movement of the mechanical holder, and the discharge voltage is applied between the discharge electrode 45 of the cap 3 and the injection nozzle 30 via the ground plate 46 and the conductive wire, thereby ejecting. Gas ignites. Then, by continuing to press the operation button as it is, the ignition and the flame are maintained. Then, when the finger is released from the operation button 5, the mechanical holder 42 of the piezoelectric unit 40 returns to the original position by the repulsive force of the return spring inside the piezoelectric unit 40, and the rotating lever 43 is released from the pressing by the lever pressing 44. Then, the nozzle member 25 is lowered to the original position by the repulsive force of the nozzle spring 26, the valve mechanism 20 is closed, the gas passage is shut off, and the flame is extinguished.

In the ignition rod 1, first, the main case 2 is formed by fitting the front case 2 a and the back case 2 b in the state shown in FIG.
The cap 3 is attached in the state shown in FIG.
Assemble in the state shown in (c). In FIG. 4, the internal mechanism and the like are omitted.

As shown in FIG. 5, the cap 3 has a joint 50 from one side to the tip, and as described above, the crater 3a and the air inlet 3b are open, and the discharge electrode 45 is formed. I have. On both sides of the side of the cap 3, hook holes 51 for engaging with elastic hooks 53 provided on the side of the main body case 2 described later are provided.
At the lower end of the joint 50 on one side of the cap 3, a claw portion 52 is provided which is folded inward so that the projecting portions formed on the opposite edges on both sides overlap.

Elastic hooks 53 are formed on both sides of the front end of the main body case 2 to engage the holes 51 on both sides of the cap 3 to hook the cap 3 to the main body case 2. Each of the elastic hooks 53 is provided on the front case 2a and the rear case 2b so as to be opposed to both sides of the main body case 2, and the elastic hooks 53 are provided on the front case 2a and the back case 2b made of synthetic resin. The elasticity is imparted by cutting a part of the outer wall of the end to form a cantilever support.

A groove 54 for engaging with the claw 52 of the cap 3 is provided on one side of the tip of the main body case 2. The groove 54 is formed by opposing notches formed in the mating surface of the front case 2a and the back case 2b, and the claw 52 of the cap 3 is formed by engaging the claw 52 of the cap 3. To prevent separation of the projecting parts on both sides
The joint 50 is prevented from spreading.

As shown in FIGS. 6 and 7, when the cap 3 is attached to the tip of the main body case 2 from the axial direction, the claw 52 of the cap 3 enters the groove 54 of the main body case 2. When the cap 3 is further pushed in, the elastic hooks 53 on both sides of the main body case 2 engage with the holes 51 on both sides of the cap 3 respectively. Thus, the cap 3 is hooked, the claw portion 52 is locked by the groove portion 54, and the cap 3 is fixed to the main body case 2 in a state where the joint 50 does not spread. for that reason,
The seam of the cap 3 is not widened by a strong impact load such as a drop impact or other external force, so that the effect of hooking is not weakened, and the cap 3 is prevented from being detached by such an impact load. Also, when disassembling,
If the elastic hook 53 is pushed in to release the hook stopper and is pulled out in the axial direction, the claw portion 52 comes off the groove portion 54, and the cap 3 can be easily removed.

The above embodiment can be modified as appropriate, for example, the hook fixing mechanism is constituted by an elastic hook provided on the cap side and a hole provided on the main body case.

Although the illustrated example is designed for a Buddhist altar, the present invention is of course applicable to other various types of ignition rods, and is not limited to a rod-shaped ignition device. It can be widely applied to devices in general.

[0032]

As described above, according to the present invention, the cap assembling structure of the igniter can be disassembled with a hook and can withstand a strong impact load such as a drop impact. Wear.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view in rear view of an ignition rod according to an example of an embodiment of the present invention;

FIG. 2 is a top view of the ignition rod according to the embodiment of the present invention;

FIG. 3 is a vertical cross-sectional view of the ignition rod according to the embodiment of the present invention, as viewed from a side.

4A to 4C are perspective views showing a procedure for assembling the ignition rod according to the embodiment of the present invention;

FIG. 5 is a sectional view (a), a rear view (b), a perspective view (c), and a bottom view (d) of a cap of an ignition rod according to an embodiment of the present invention,

FIGS. 6A and 6B are an exploded perspective view of an ignition rod tip portion and a perspective view of the assembled state of the ignition rod showing an ignition rod cap assembling structure according to an embodiment of the present invention;

FIGS. 7A and 7B are an exploded rear view of the tip of the ignition rod, showing only the cap in cross section, and a rear view of the assembled state of the ignition rod according to the embodiment of the present invention; FIGS.
It is.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ignition rod 2 Main body case 3 Cap 10 Gas tank 20 Valve mechanism 30 Injection nozzle 40 Piezoelectric unit (ignition mechanism) 50 Seam 51 Hole 52 Claw 53 Elastic hook 54 Groove

Claims (3)

[Claims] 1. A cap assembling structure for an ignition device in which a cap having a joint at a side is assembled to a tip of an apparatus main body and fixed by a hooking mechanism, wherein the cap is opposed to both sides of the joint at the side. A protruding portion formed on an edge to be formed is provided with a claw portion which is folded inward and overlapped, and the device main body is locked with the claw portion to separate the protruding portions on both sides constituting the claw portion. A cap assembling structure for an igniter, characterized in that a groove is provided for preventing the ignition. 2. A gas tank for storing a fuel gas, a valve mechanism for opening and closing a gas passage from the gas tank, and a fuel arranged at a front end in a longitudinal direction of the apparatus and supplied from the valve mechanism through an extension passage. A rod-shaped injection nozzle and an ignition mechanism for igniting the fuel gas injected from the injection nozzle are provided in the apparatus main body, and a cap having a seam at the side is assembled to a tip of the apparatus main body and fixed by a hook fixing mechanism. A cap assembling structure for an ignition device, wherein the cap is provided with a claw portion formed by folding inwardly a projecting portion formed on opposite edges on both sides of the side joint and overlapping each other. A cap portion for an ignition device, characterized in that a groove portion is provided for locking the claw portion and preventing separation of the projecting portions on both sides constituting the claw portion. 3. The device according to claim 1, wherein the hooking mechanism comprises an elastic hook provided on a side portion of the apparatus main body, and a hole provided in the cap so as to engage with the elastic hook. A cap assembling structure for the igniter according to the above.