JPH0357247Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention has a lid locking device for a device with a built-in heating element, in particular a replaceable oxygen generating can containing a chlorate candle, and is suitable for use in the respiratory system and circulatory system. This invention relates to a lid locking device for a portable oxygen inhaler, which is used as an emergency item when a person with a system disease has difficulty breathing.

[Conventional technology]

In a portable oxygen inhaler, even after oxygen generation from the oxygen generating can has ended, the oxygen generating can remains heated to a high temperature. It is dangerous to take out the oxygen generating can from the case body in this state, and some users may use it without being aware of this situation, so we recommend using a conventional portable oxygen inhaler. In this case, the oxygen generating canister was made impossible to remove from the case body.

[The problem that the idea attempts to solve]

In the conventional portable oxygen inhaler mentioned above, once the oxygen generation can has finished generating oxygen, even if you want to replace it with a new oxygen generation can, you cannot replace it, and the used oxygen generation can is stored in the case itself. It was an uneconomical practice to dispose of each item after each use.

The present invention solves the above problems by providing a device that covers the case body with a lid and locks the lid so that it cannot be opened until the surface temperature of the oxygen generating can falls to a temperature that is safe to touch. This is an attempt to solve conventional problems.

[Means to solve the problem]

The present invention will be explained in detail below based on the drawings. 1 is the case body, 2 is the lid that covers the case body 1, 3 is the locking part provided on the lid 2, and 4 is the lock attached to the case body 1. A rod is attached to the locking part 3 so that it can be freely engaged and detached when the lid body 2 is closed. 5 is a spring suspended so as to constantly press the locking rod 4 to the engagement position with the locking portion 3;
6 is a guide tube fixed inside the case body 1, 7
is an oxygen generating can containing a chlorate candle which is replaceably inserted into a guide cylinder 6, and is provided with a striking part 8 at one end and an oxygen outlet 9 at the other end. 10 is an opening provided in the cylindrical wall of the guide tube 6 at a location facing the locking rod 4; 11 is a heat-sensitive actuating piece fitted into the opening 10 so as to be in contact with the outer wall of the oxygen generating can 7; The part 12 is fixed to the guide tube 6 with screws 3, etc., and is made of a material that deforms in proportion to temperature changes, such as bimetal or shape memory alloy, so that the outer wall of the oxygen generating can 7 is fixed to the guide tube 6 while the temperature does not rise. The upper end 14 side is shaped so that it can separate from the outer wall of the oxygen generating can 7 using the lower end 12 as a fulcrum as the temperature rises.
15 is a pushing end provided on the upper end 14 of the actuating piece 11; 16 is a rack gear supported by the pushing end 15 so as to be pushed toward the lock rod 4; 17 is a gear tooth of the rack gear 16. The pinion 18 is pivotally supported so as to mesh with the lock rod 4 to the pinion 1.
A stopper provided so as to protrude near 7, 19
is a cam plate supported to rotate in synchronization with the pinion 17, and when the rack gear 6 is not pushed, it is off the stopper 18, and when the rack gear 16 is pushed, it rotates to a position where it hits the stopper 18. It is supported to do so. 20 is an emergency unlocking pinion that is pivotally supported so as to mesh with the pinion 17, 21 is an emergency unlocking key for rotating the pinion 20, and 22 is a striking part 8.
The striking device 23 is a hose connected to lead oxygen from the oxygen outlet 9 to an oxygen mask (not shown).

[Effect]

When the cap 2' fitted to the upper end of the lid body 2 is removed and the striking part 8 is struck by the striking device 22, the impact force is transmitted to the chlorate candle in the oxygen generating can 7, a thermal reaction occurs, and oxygen is released. Occur. The generated oxygen is sent from the oxygen outlet 9 through the hose 23 to the oxygen mask.

The above thermal reaction is carried out from the end of the chlorate candle on the striking part 8 side to the oxygen outlet 9 while generating high heat.
The heat gradually progresses toward the side ends, and the high heat described above is transmitted to the outer wall surface of the oxygen generating can 7, and the surface temperature of the oxygen generating can 7 rises. Then, the actuating piece 11 is deformed to be separated from the outer wall of the oxygen generating can 7 as shown in the third figure, and at the same time, the pushing end 15 pushes the rack gear 16, so that the pinion 17 and the cam plate 1
9 rotates, and the cam plate 19 rotates to a position where it abuts against the stopper 18. In this state, even if you push the locking rod 4 to release it from the locking portion 3, the stopper 18 will butt against the cam plate 19 and the locking rod 4 will be removed.
Since the lid 2 is prevented from being pushed, the lid 2 is held in a locked state. This lock state is maintained not only while the above thermal reaction is in progress, but also after the above thermal reaction has finished.
This continues until the surface temperature of the oxygen generating can 7 drops to a temperature that is safe to touch. When the surface temperature of the oxygen generating can 7 falls to a safe temperature, the operating piece 11 returns to its original position and the rack gear 16 also returns to its original position, so the pinion gear 17 and the cam plate 19 rotate in the opposite direction, and the cam plate 19 rotates in the opposite direction. It rotates to a position where it is removed from the stopper 18. In this state, when a force is applied to the lid body 2 in the direction of opening it, the locking rod 4 resists the elasticity of the spring 5 and the locking portion 3
The lid body 2 can be opened.

If it becomes necessary to open the lid 2 while the lid 2 is locked, turn the pinion 20 with the key 21 to forcibly move the cam plate 19 to the position where it is removed from the stopper 18. Unlock body 2.

〔Example〕

The case body 1 and the lid 2 are connected, for example, by a hinge 38, and are provided with handles 24 and 25 that connect to each other when the lid 2 is closed.
The rack gear 16 is inserted into the hollow part 26, and the pinion 17, cam plate 19,
A pinion 20 is installed, grooves 27 and 28 are provided in which the handles 24 and 25 are connected, a locking portion 3 is provided in the groove 28, and a locking rod 4 is pivotally attached to the groove 27 29.
However, a recess 30 is provided in a portion of the locking rod 4 facing the hollow portion 26, and the stopper 18 is provided so as to be inserted into the hollow portion 26 from this recess 30.
A spring 5 is suspended between the recess 30 and the bottom of the groove 28, and a spring 31 for pushing back the rack gear 16 is suspended between the tip of the rack gear 16 and the inner wall of the hollow portion 26. The lid body 2 includes, for example, an oxygen mask and an oxygen outlet 9 above the case body 1.
A shape that forms a space 32 in which the hose 23 that connects the hose 23 can be stored is used. The oxygen generating can 7 is inserted into the guide cylinder 6 so that the oxygen outlet 9 faces downward, and the hose 23 is connected to the handles 24 and 25.
Push the handle into the passages 33 and 34 provided inside the handle 2.
Nipples 3 that can be separated from each other at the joints of 4 and 25
5, 36 may be connected, and passages 33, 34
In some cases, the duct is formed into a duct, and the hose 23 is connected to the inlet and outlet of the duct. In this way, the oxygen can be sent far away from the oxygen generating can 7, so that the oxygen can be prevented from being heated by the heat generated by the oxygen generating can 7.
The guide tube 6 is made of a material with good thermal conductivity, such as aluminum, and is made of a thick wall.
to equalize the surface temperature of the surface, lower its maximum surface temperature, and eliminate the cause of fire in the unlikely event of a fire. In addition, the heat transmitted from the oxygen generating can 7 to the guide tube 6 is radiated to the gap 37 formed around the guide tube 6, and this heat radiation causes an upward airflow in the gap 37, resulting in an air cooling effect on the guide tube 6. To reduce the amount of heat transmitted to a case body 1 and a lid body 2, and to maintain their surfaces at a safe temperature even when touched by hand. The present invention may be configured such that various heating elements other than the oxygen generating can 7 are built into the case body 1.

[Effect of idea]

As mentioned above, in this invention, the locking device is configured to be driven by a heat-sensitive actuating piece that deforms due to the heat generated by a heating element such as an oxygen generating can, thereby increasing the reliability of the lid lock when the heating element generates heat. When the surface temperature of the heating element drops to a temperature that is safe to touch, the lid can be unlocked.
The heating element, such as a used oxygen generating can, can be taken out of the case body and replaced with a new heating element, and the heating element does not have to be disposed of for each case body, resulting in economical effects. .

[Brief explanation of drawings]

The drawings show an embodiment of the present invention. Figure 1 is a sectional view of a portable oxygen inhaler incorporating the device of the present invention, Figure 2 is a plan view of the inhaler, and Figure 3 is a diagram of the device of the present invention. FIG. 4 is a diagram illustrating the locking operation, and FIG. 4 is a diagram illustrating the unlocked state of the device of the present invention. 1...The case body. 2... Lid body, 3... Locking part, 4... Locking rod, 5... Spring, 7...
Oxygen generating can, 11... heat-sensitive actuating piece, 16... rack gear, 17... pinion, 18... stopper,
19...Cam board.

Claims (1)

[Scope of utility model registration request] A lid is placed over the case body containing the heating element, a locking portion is provided on the lid, and a locking rod is attached to the case body that can be freely engaged with and detached from the locking portion when the lid is closed. A spring is suspended on this locking rod to constantly press it into a position where it engages with the locking portion, and a material that deforms in proportion to the temperature change of the heating element is placed at a portion facing the locking rod. A heat-sensitive actuating piece is provided, the heat-sensitive actuating piece being deformed so as to push a lock gear supported between the heat-sensitive actuating piece and the locking rod when the temperature of the heating element exceeds a predetermined temperature, Between the piece and the lock rod, there is a pinion gear supported so as to mesh with the rack gear, and a cam plate supported so as to rotate in synchronization with the pinion gear. The lock gear rotates to a position where it does not abut against the stopper provided on the locking rod, allowing the locking rod to move to a position where it is released from the locking portion, and when the lock gear is pushed, it moves to a position where it abuts against the stopper. A lid locking device for a device with a built-in heating element, which is provided with a rotating cam plate.