JP3110951B2 - Ignition rod safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition rod which emits flame from a rod-like tip by an ignition operation of an operation member.
The present invention relates to a safety device for an ignition rod which normally locks the ignition operation of an operation member and releases the lock when used to enable the ignition operation.

[0002]

2. Description of the Related Art An ignition rod is a convenient one that can be easily ignited by pushing a trigger-like operating member, but a child such as a child who does not know how to use it properly can safely ignite. This is not preferred.

[0003] In order to prevent accidental ignition by a person who does not know the proper use or to prevent accidental ignition, an ignition rod with improved safety has been demanded. Ignition rods with various safety devices have been proposed.

[0004] For example, Japanese Utility Model Application Laid-Open No. Sho 62-5565,
All of the safety devices for an ignition rod disclosed in -122828 and U.S. Pat.No. 5,199,865 are designed to manually move a lock member for preventing operation of an operation member between a lock position and a release position. After the ignition is moved from the lock position to the release position and ignited, the safety device remains released unless it is manually returned to the lock position.

In the above conventional ignition rod, after the lock member is moved to the release position to perform ignition, if the lock member is left forgotten to return the lock member from the release position to the lock position, the lock member becomes a safety device. Therefore, there is a problem that the above-mentioned careless ignition can be performed without performing the lock function.

In a gas lighter, for example,
As disclosed in JP-A-5-256448 and U.S. Pat. No. 4,832,596, a lock member that disables the operation of a part of an operating lever that is pressed down when igniting a gas lighter is deformed or slid. When the lock member is moved to the lockable position in response to the operation and the operating lever is pushed down after manually operating the lock member to the release position, or the hand is released from the gas lighter. At this time, a structure has been proposed in which a locked state is returned by a spring so that the locked state is not left.

[0007]

However, the safety mechanism of the gas lighter described above cannot be applied to an ignition rod having a different structure as it is, but the structure of the ignition rod body and an operating member for performing an operation for ignition. In terms of the shape, the relationship with the protective frame formed around the operation member, etc., the ignition lock is normally performed separately for the ignition rod, and the ignition lock is released by the operation related to the operation of the operation member separately during ignition. On the other hand, there is a demand for achieving a mechanism that allows the operating member to automatically return to the locked state following the return movement of the operating member with a simple structure after ignition.

In view of the above, the present invention is applied to an ignition rod adapted to perform ignition by operating an operation member, and provides an ignition rod safety device capable of performing ignition lock, unlocking, and automatic return. The purpose is to do so.

[0009]

In order to achieve the above object, the present invention provides a safety device for an ignition rod, comprising a jet nozzle for jetting gas at a rod-like tip, a gas tank in a main body, and the jet nozzle from the gas tank. A valve mechanism for opening and closing gas supply to the nozzle and a piezoelectric unit for generating a discharge voltage for ignition are installed, and an operation member for driving the valve mechanism and the piezoelectric unit to perform an ignition operation is slidably installed. The operating portion of the operating member is disposed so as to be exposed to the outside of the main body, and a protective frame is provided so as to surround the operating portion. A portion is provided movably extending to the side of the operation member, and the other end portion interferes with a part of the operation member when in a non-operating locked state to lock the ignition operation of the operation member. With a locking part The locking part moves in response to the lock release operation of the protection frame, the ignition operation of the operation member is performed with the interference with the operation member released, and the lock is automatically locked by the return movement of the operation member and the restoration movement of the protection frame It is characterized by returning to a state.

[0010] Further, a projection is provided on a side surface of the operation member, and a locking portion which interferes with the projection is provided on the protection frame.
It is preferable that the locking portion is moved to a position where it does not interfere with the unlocking deformation of the protection frame.

Further, it is preferable that the protective frame is provided so as to be elastically deformable at one end with the other end as a base point, so that the protective frame is moved from an unlocked state to a locked position by a restoring force due to elastic deformation.

[0012]

According to the ignition rod safety device of the present invention, when the protection frame is in the locked state, the locking portion of the protection frame is located at a position where it interferes with a part of the operation member, and the operation member is moved. To prevent ignition lock. When the protection frame is operated in the unlocking direction against the restoring force, the interference between the locking portion and the operation member is released, whereby the operation member can be moved. The ignited fuel gas is ignited. When the operation of the operation member and the protection frame is released, a part of the operation member and the locking portion of the protection frame are restored to an interference state and the ignition lock state is automatically restored as the operation member returns. In addition, when not in use, the ignition operation of the operating member is always disabled to prevent inadvertent ignition, so that an extremely safe ignition rod can be realized.

[0013] Further, by locking and releasing the operating member by utilizing the relatively large displacement of the protective frame, the displacement of the unlocking operation can be large, and the unlocking operation can be reliably performed. Is obtained. In particular, if the protection frame is provided in a structure utilizing elastic deformation, the protection frame can be restored from the unlocked state to the locked state without requiring a separate urging means.

Further, in a state where the lock is released by displacing the protection frame, the locked state is not obtained even when the operation member is restored, and the lock of the protection frame is unlocked by a finger different from the operation of the operation member. By performing the operation, 1
At the time of re-ignition when the ignition is not performed by the ignition operation of the operation member twice, it is not necessary to perform the unlocking operation every time the ignition is performed, and the operability is excellent.

On the other hand, since the ignition lock is released by deforming the normally fixed protective frame, it is difficult for a person who does not know proper use to release the lock.
In addition, careless ignition is prevented.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a sectional view of a main part of an ignition rod having a safety device as an example, FIG. 2 is a perspective view of the safety device, FIG. 3 is an exploded perspective view thereof, and FIG. 4 is a perspective view of an unlocked state. I have.

The ignition rod 1 is composed of a main body 2 and an extension 3 (a tip portion is not shown) extending in a rod shape from the main body 2. The main body 2 has a case portion formed by a tank cover 5 on the base end side and an intermediate case 6 in front of the tank cover 5. The tank cover 5 is formed in a cylindrical shape with an open front, and the intermediate case 6 is divided vertically at substantially the center, one of which is shown in FIGS.

A gas tank 7 made of a synthetic resin for accommodating a high-pressure gas such as butane gas is installed in an outer case 5 at the base end side of the main body 2. A valve mechanism 8 for opening and closing the supply is provided. A gas is supplied to the valve mechanism 8 through a wick 9 inserted into the gas tank 7, and a nozzle member 10 is interposed in the gas passage, and the passage is moved by the forward movement of the nozzle member 10. When the gas is opened, the passage is closed by the retreat movement by the spring, and the gas supply is stopped. The gas supply amount, that is, the size of the flame,
It is adjusted by the rotation of a flame adjustment knob 13 connected to the adjustment sleeve 12 and protruding to the outside.

One end of a rotary lever 14 for opening the nozzle member 10 is engaged with the tip of the nozzle member 10 of the valve mechanism 8. Shield packing 15 made of material is attached. The other end of the turning lever 14 is linked to an operation member 20 described later, and the turning lever 14 is pivotally supported on both side extending portions of the gas tank 7.

On an extension of the nozzle member 10, a sleeve member 16 that contacts the shield packing 15 is installed. One end of a connector pipe 17 is connected to the sleeve member 16, and the other end of the connector pipe 17 is connected to the sleeve member 16. It is connected to one end of a gas pipe 18. The gas pipe 18 extends to the tip of the extension 3 and is connected to an ejection nozzle (not shown) to supply gas.

The intermediate case 6 of the main body 2 has
An operation member 20 (ignition lever) is slidably provided on the side of the valve mechanism 8 in parallel with the center line of the valve mechanism 8, and a piezoelectric member is provided between the operation member 20 and the gas tank 7. A unit 22 is provided.

The operating member 20 is provided with an opening 6a of the intermediate case 6.
A cylindrical part slidably supported from the inside (see FIG. 3)
20b, and the operating portion 20 is obliquely provided at the tip of the cylindrical portion 20b.
a is provided, and projecting portions 25 projecting laterally are connected to both side surfaces of the cylindrical portion 20b. A leg 20d extending in the sliding direction is provided at the end of the cylindrical portion 20b on the valve mechanism 8 side.
Are connected. The leg portion 20d is configured to rotate in association with the end of the rotating lever 14 during the ignition movement.

That is, the rotating lever 14 is formed in a substantially L-shape, is rotatably supported about a fulcrum of an intermediate portion, and is rotated by a leg 20d of the operating member 20. The valve mechanism 8 is rotated by the rotation caused by the ignition operation.
The nozzle member 10 is moved so as to be pulled out and opened to supply gas.

The piezoelectric unit 22 supplies a discharge voltage, and a slide portion 22a which expands and contracts is fitted to a cylindrical portion 20b of the operation member 20, and the operation member 20 is turned on.
The slide portion 22a is immersed and moved in accordance with the retreat operation, thereby generating a discharge voltage. The lead wires 23 (two) connected to the electrodes of the piezoelectric unit 22
It is disposed so as to extend to the distal end portion, and is connected to a discharge nozzle (not shown) and a discharge electrode at the distal end portion.

In the intermediate case 6, a protective frame 26 surrounding the outside of the operation portion 20a of the operation member 20 while forming a space for inserting a finger is separately formed. A connecting tube 6b extends from the base of the intermediate case 6, and the connecting tube 6b is connected to the gas tank 7, and the tank cover 5 is fitted to the outer peripheral portion thereof.

On the other hand, a safety device for locking or releasing the ignition operation of the operation member 20 with respect to the ignition rod 1 having the above structure is constituted by the protection frame 26 and the projection 25 of the operation member 20. I have.

The projection 25 of the operation member 20 is
Is formed so that the front end is narrower and wider at the inner end, a step 25a is provided on one side, and the opposite end is an inclined surface.
25b. A notch 6d formed on the wall 6c of the intermediate case 6 (see FIG. 3).
The stepped portion 25a abuts on the inner surface of the wall 6c to regulate the projecting position of the operation member 20.

The protective frame 26 is provided with a fixing portion 26b at one end of a bent frame 26a. The fixing portion 26b is inserted into the locking window 6e of the intermediate case 6, and fixes the intermediate case 6 by sandwiching the intermediate case 6 between the front and rear plate members. Has a fixing projection 6f
The end of the fixing portion 26b of the protective frame 26 abuts on the fixing protrusion 6f, and the engagement and fixing thereof are firm and secure.
The fixing projection 6f of the operation member 20 which is close to the operation portion 20a is formed in a tapered shape so that the space in the protection frame 26 is smoothly continuous.

The protection frame 26 is mounted and supported only by the fixing portion 26b, and the other end 26c of the frame 26a is inserted into the intermediate case 6 and is movably incorporated therein. Also,
When the protective frame 26 is deformed so that the other end portion 26c is pushed into the intermediate case 6, that is, when the protective frame 26 is unlocked and deformed,
The other end 26c moves in a direction substantially perpendicular to the sliding direction of the operation member 20 by elastic deformation with the fixed portion 26b as a base end, and has an elastic restoring force accompanying the deformation.

The other end 26c of the protection frame 26 extends to both sides, extends inward along the side of the operation member 20, and the operation member 20 is inserted between the other ends 26c on both sides. A bent stopper 26d is provided at the tip of the other end 26c, and the stopper 26d abuts the projection 25 of the operation member 20 from inside to restrict the position in the projecting direction.
When the lock is deformed by pushing, the stopper 26d comes into contact with the opening edge 6h of the intermediate case 6 to restrict the pushing limit.

On the inner side near the stopper 26d, there is provided a locking portion 27 projecting inward. The end surface of the locking portion 27 is the inclined surface 25 of the projection 25 of the operation member 20.
It is formed on a substantially parallel inclined surface 27a facing b (see FIG. 5). The interval between the inner sides of the other end portions 26c on both sides corresponds to the width of the operation member 20 including the projection 25, and the projection 25 can be inserted without being locked, while the locking portions 27 on both sides can be inserted.
Is equivalent to the lateral width of the operation member 20 excluding the protrusion 25, and is formed to have such a size that the protrusion 25 cannot pass and interfere. A protrusion 26e is provided on the frame 26a at the base where the other end 26c branches off.
Similarly to 26d, it is provided so as to be able to abut on the front surface of the intermediate case 6 for regulating at the time of pushing deformation.

Due to the relationship between the operating member 20 and the protection frame 26, the projection 25 and the locking portion 27 interfere with each other to perform ignition lock, while the other end 26c of the protection frame 26 is pushed in to release the ignition lock. In this state, the operation portion 20a is operated to slide the operation member 20 to enable the ignition operation. When the operation member 20 returns and releases the unlocking operation of the protection frame 26, the locking portion 27 is automatically activated. It is configured to return to the ignition locked state.

The operation of the above-described safety device for the ignition rod 1 will be described. First, the state shown in FIG. 1 and FIG. 2 is a normal state (non-use) in which the protection frame 26 is in a lock state where the other end 26c protrudes while the protection frame 26 is left, and in this state, FIG. As shown in FIG.
Is located at a position where it interferes with the protrusion 25 of the operation member 20. If the operation member 20 is to be pushed in the locked state, the projection 25 comes into contact with the locking portion 27, and the operation member 20 cannot be operated for ignition. Therefore, even if a person who does not know how to use the ignition rod 1 operates the ignition rod 1, it is safe without ignition.

Next, when it is desired to use the ignition rod 1, FIG.
As shown in FIG. 7, the protection frame 26 is deformed so as to push the other end 26c of the protection frame 26, and the ignition operation is performed so that the operation member 20 is pushed in with this lock release operation. When the other end portion 26c is pushed in, the locking portion 27 is moved inward, and as shown in FIG.
As a result, the operation member 20 is depressed from the interference position, and is unlocked, so that the operation member 20 can be pushed in as shown in FIG.

When the operation member 20 is ignited, the nozzle member 10 is pulled out via the rotating lever 14 with the movement of the operation member 20, the valve mechanism 8 is opened, and the gas pipe 18 is opened.
To supply gas to the jet nozzle. Operation members
A discharge voltage (AC voltage) is generated from the piezoelectric unit 22 in accordance with the operation 20 and is applied between the discharge electrode of the extension 3 and the ejection nozzle to ignite the ejection gas.

When the operator releases the operating member 20 to extinguish the fire,
Operating member by the elastic force of the spring in the piezoelectric unit 22
20 protrudes and returns to the initial position, and the protective frame 26
When the release operation is released, the restoring elastic force causes the other end 26c to move in the protruding direction, the locking portion 27 to move to the interference position with the projection 25, and to prevent the operation member 20 from being pushed. Automatically returns to

When the unlocking operation of the protection frame 26 is released before the operation member 20 returns, the locking portion 27 of the protection frame 26 is moved to the locked position first.
The inclined surface 25b of the projection 25 of 20 comes into contact with the inclined surface 27a of the locking portion 27, and moves while passing the locking portion 27 so as to deform the protective frame 26, and returns to the locked state. .

According to the above-described embodiment, since the metal spring is not used as the restoring force of the protection frame 26 from the unlocked state to the locked state, the manufacturing cost is reduced and the structure is easy to assemble. Workability is good. In addition, the elastically deformed portion is the entirety of the protection frame 26 with the fixed portion 26b as a starting point, and the displacement operation amount at the time of unlocking is increased, so that the operation is reliable, the unlocking operation is easy and the required dimensional accuracy is low Manufacturing becomes easier.

Further, in the state where the lock is being released by pushing the protection frame 26 in, even if the operation member 20 is returned, the locked state is not obtained even when the operation member 20 is returned. By performing the unlocking operation, when the ignition is not performed by one push-in ignition operation of the operating member 20, it is sufficient to simply push the operating member 20 at the time of re-ignition, and it is not necessary to perform the unlocking operation every time. Excellent operability.

In the above embodiment, the restoring force for returning from the unlocked state to the locked state is obtained by utilizing the elastic deformation of the protection frame 26.
The other end 26c of 26 is displaceably provided with one end as a base point,
An urging member for urging the other end 26c in the projecting direction may be separately provided.

[0041]

According to the safety device for an ignition rod of the present invention as described above, the protective frame installed so as to surround the operating portion of the operating member for performing the ignition operation can be restored and displaced from one end as a base point. The other end is provided movably on the side of the operating member, and the other end is provided with a locking portion that interferes with a part of the operating member when in a locked state, which involves a release operation of the protective frame This makes it difficult for anyone who does not know how to use the lock properly to prevent unlocking, prevents inadvertent ignition, and automatically locks the operating member by returning the operating member and restoring the protective frame. By returning to the state, it is not left in the unlocked state, and in the fire extinguishing state, a reliable locked state can be ensured and reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a main part of an ignition rod provided with a safety device according to an embodiment of the present invention in a longitudinal section.

FIG. 2 is a perspective view showing the safety device of FIG. 1 with a case and an internal structure partially removed;

FIG. 3 is an exploded perspective view of an intermediate case, an operation member, and a protection frame.

FIG. 4 is an essential part perspective view showing an unlocked state.

FIG. 5 is an explanatory diagram showing a positional relationship between a locked state and an unlocked state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ignition rod 2 Main part 6 Intermediate case 7 Gas tank 8 Valve mechanism 20 Operation member 20a Operation part 22 Piezoelectric unit 25 Projection part 26 Protective frame 26a Frame 26b Fixed part 26c Other end 27 Lock part

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23Q 2/16 F23Q 2/28

Claims (3)

(57) [Claims] 1. A rod-shaped tip portion having an ejection nozzle for ejecting gas, a main body portion having a gas tank, a valve mechanism for opening and closing gas supply from the gas tank to the ejection nozzle, and a piezoelectric member for generating a discharge voltage for ignition. A unit is installed, and an operating member that drives the valve mechanism and the piezoelectric unit to perform an ignition operation is slidably installed, and an operating portion of the operating member is disposed so as to be exposed outside the main body. In addition, in the ignition rod having a protective frame installed so as to surround the operation unit, the other end of the protective frame that can be restored and displaced from one end as a base extends to the side of the operation member and is movable. A locking portion that interferes with a part of the operation member and locks the ignition operation of the operation member when the other end portion is in a non-operating locked state; Responds to unlock operation The operation of the ignition of the operating member is performed in a state in which the locking portion has moved and the interference with the operating member has been released, and the locked state is automatically restored by the returning movement of the operating member and the restoring movement of the protection frame. Ignition rod safety device. 2. A projection is provided on a side surface of the operation member, and a locking portion is provided on the protection frame so as to interfere with the projection. The safety device for an ignition rod according to claim 1, wherein the safety device is moved. 3. The protection frame according to claim 1, wherein the protection frame is elastically deformable at one end with respect to the other end, and moves from an unlocked state to a locked position by a restoring force due to the elastic deformation. Ignition rod safety device.