JPS6260545A - Heat processed article for generating impact wave - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pyrotechnic device for generating shock waves, and more specifically, for crushing stones formed in the kidneys or urinary tract.
This invention relates to an improved pyrotechnic device for generating shock waves, which generates shock waves by detonating an explosive placed at the focal point of an elliptical reflector.

[Conventional techniques and problems] Traditionally, open surgery was the only treatment for stones occurring in the kidneys or urinary tract, but in recent years, extracorporeal shock wave lithotripsy has been developed to cure stones without open surgery. ing.

Conventional stone crushing equipment crushes kidney stones and urinary tract stones,
The idea is to have the crushed stones naturally excreted from the body along with urine, and specifically, the stones are crushed and removed in the following manner.

That is, the stone crushing device has a size sufficient to submerge the patient's body and is placed in a water tank filled with water. and. The shock wave generator includes an elliptical reflector, an explosive supported by a support member so as to be located at a first focus of the elliptical reflector, and an electrode embedded in the explosive for detonating the four drugs by energization. and has.

In such a lithotripter, an anesthetized patient's body is first submerged in a water tank. In order to confirm and monitor the exact location of the affected area, the affected area is displayed on a monitor screen using an X-ray photographing or imaging device. This fixes the patient's body so that the affected area is accurately located at the second focal point of the ellipse.Then, in the #I percussion generator, the explosive placed at the first focal point of the elliptical reflector is When detonated instantaneously (one second), the high heat accompanying the explosion causes explosive vaporization of water, generating a shock wave. This shock wave propagates through the water, is reflected by an elliptical reflector, and is reflected by the second elliptical mirror.
It is focused at a focal point, where the energy density is maximum.

Approximately 70% of the skin and muscles of the human body are composed of water, so the energy of shock waves generated in water is transmitted within the body with almost no change. Furthermore, shock waves have the characteristic of emitting energy when passing through an interface between materials having different acoustic impedances.

Stones are usually formed of calcium-containing materials, so when a shock wave hits a stone, the energy of the shock wave is released and causes the stone to fragment.

Since a single shock wave does not break up a stone, in reality, for example, 200 to 500 shock waves are administered to the affected area. Furthermore, the interval at which the shock waves are generated is matched to the patient's heartbeat.

The broken stone pieces are naturally expelled from the body, allowing the affected area to heal.

The explosive detonation mechanism in the stone crushing device includes, for example, electrically heating a zero igniter to ignite it;
There are methods that explode explosives, ■ methods that heat explosives with a laser and detonate them, and methods that use friction to ignite explosives that are sensitive to friction, thereby causing the explosives to explode.

However, although the electric circuit for igniting the pyrotechnic device can be easily manufactured using method (2) above, it is necessary to incorporate a bridge wire, etc. into the pyrotechnic device itself, making the manufacturing process complicated and reducing the price. The problem is that it cannot be done.

The above method (■) has a simple structure of the pyrotechnics itself, so
Although it is easy to manufacture, the laser generator is expensive and it is not possible to reduce the cost of the entire medical device.

Although the above-mentioned method (2) has low material costs for the pyrotechnics, the assembly is complicated, which results in an increase in manufacturing costs.

This invention has been made based on the above circumstances.

That is, an object of the present invention is to provide a shock wave generating processed product that has a simple structure, can be easily manufactured, has a low manufacturing cost, and is suitable for continuously generating shock waves. It is in.

[Means for solving the above problems] The gist of the present invention for solving the above problems is to provide a shock wave generating pyrotechnic device that generates shock waves by detonating an explosive at the focus of an elliptical reflector in a stone crushing device. In this product, a pedestal is placed at the focal point of an elliptical reflector, a pin is placed opposite to the pedestal so as to be able to rush toward the pedestal, and an explosive for generating a shock wave, which is detonated by impact, is sent from the tip of the pin. A shock wave characterized by being arranged at any position up to the pedestal, and by colliding the tip end surface of the pin with the pedestal, the shock wave generating explosive is detonated and a shock wave is generated at the focal point. It is a processed product for generation.

According to the configuration of the present invention, the shock wave generating explosive is detonated at the focal point of the elliptical reflector by a simple action of colliding a thrusting pin with an appropriate driving means against a pedestal placed at the focal point of the elliptical reflector; It can generate shock waves.

The shape of the pin is not particularly limited as long as it can strike the shock wave generating explosive that will eventually be placed on the pedestal.Therefore, the pin may have the simplest shape, such as a thin cylinder. I can do it. When the pins are formed into a thin cylindrical shape, a large number of these pins are stored in a cassette, for example, and the focus of an elliptical reflector is used to quickly and IM
Can continuously generate shock waves.

[Example] For the following example of this invention, please refer to the drawings.
explain.

FIG. 1 is a longitudinal sectional view showing an example of a stone crushing device using the shock wave generating processed product of the present invention.

This calculus crushing device 211 has an elliptical reflecting mirror 2. The ellipsoidal reflecting mirror 2 has the shape of a spheroid that is sliced along a plane perpendicular to the axis connecting the two focal points of the spheroid.

A pedestal 3A is placed within this elliptical reflection tt12 so that the plane 3 is located at its focal point F.

A pin 4 capable of moving toward the plane 3 of the pedestal 3A is arranged opposite to the plane 3 of the pedestal 3A at a predetermined distance.

This pin 4 is housed in a case 5 that ensures that the vehicle travels straight and protects the pin 4.

A protrusion 6 is provided on the tip end face of the pin 4 facing the plane 3 so as to have a common axis. Furthermore, a shock wave generating explosive 7 is loaded onto the tip surface of the pin 4, and the protrusion 6 is embedded in the shock wave generating explosive 7.

A pin pressing piece 9 driven by a solenoid 8 is housed in the case 5 so as to be in contact with the rear end of the pin 4.

The above configuration is the simplest embodiment.

In the embodiment described above, the solenoid 8 is driven to instantaneously move the pin suppressing piece 9 forward, causing the pin 4 to rush toward the pedestal 3A, and causing the tip of the pin 4 to collide with the flat surface 3.

Since the protrusion 6 is formed at the tip of the pin 4, the pin 4
When the tip of the protrusion 6 collides with the flat surface 3, the collision force is applied to this protrusion 6.
Concentrate on the tip. At the same time as the collision, a 1# blast wave generation explosion! M
7 explodes, and a shock wave is generated at the focal point F of the elliptical reflector 2.

The generated shock wave is reflected by the ellipsoidal reflector 2 and focused on another focal point of the spheroid, and since the stone in the affected area is located at this focal point, the energy of the shock wave is released all at once to crush the stone.

It goes without saying that the present invention is not limited to the embodiment shown in FIG.

Further, if the pedestal 3A is supported by a structure that has a mechanical strength that will not be destroyed or damaged by the collision of the pin 4 so as to position the plane 3 at the focal point F of the elliptical reflection m2, what kind of structure can be used? It may have a structure like this.

The shape of the pin 4 is not particularly limited as long as it has a structure that allows the shock wave generating explosive 7 to be hit with the tip facing the pedestal 3A. 4 to the pedestal 3A to generate a shock wave at the first outlet, a second pin 4 is newly loaded in the original position where this first grain pin 4 was loaded, and then this second In order to create a compact stone crushing device 1 that can generate a shock wave at the second outlet by thrusting the pin 4 into the pedestal 3A, and subsequently successively generate shock waves in the same manner, this pin is required. 4 is preferably a thin cylindrical body.

The tip of the pin 4 facing the pedestal 3A may be made into a flat end surface, but in order to efficiently utilize the collision force when colliding with the pedestal 3A, as shown in the above embodiment,
It is desirable to form a protrusion 6 upright on the tip surface of the pin 4.Furthermore, as another method of detonating the shock wave generating explosive 7 by the pin 4 colliding with the flat surface 3 of the pedestal 3A, there is a second method. As shown in the figure, the flat end face of the pin 4 facing the pedestal 3A has a conical recess 10 formed therein, and this recess 1
In order to prevent the shock wave generating explosive 7 from being filled in the pin 4,
When the shock wave generating explosive 7 is loaded into the tip of the pin 4 and the pedestal 3A is hit with the tip of the pin 4, the shock wave generating explosive 7 is pushed into the recess 10, and the air inside the recess 10 is insulated. It may be compressed to generate heat, and the shock wave generating explosive 7 may be exploded by this heat generation.

The shock wave generating explosive 7 may be placed anywhere between the flat surface 3 of the pedestal 3A and the tip of the pin 4 facing the flat surface 3. It is only necessary that the shock wave generating explosive 7 positioned on the plane 3 of 3A is struck by the tip of the pin 4 and detonated, and for this purpose, the shock wave generating explosive 7 must be exploded as shown in FIG.
It may be loaded at the tip of the pin 4 and moved toward the pedestal 3A as the pin 4 advances, and be struck by the pedestal 3A. Alternatively, as shown in FIG. The shock wave generating explosive 7 may be positioned on the plane 3 so that it is struck by the tip of the rushing pin 4, and furthermore, the explosive 7 may be positioned in the middle between the pedestal 3A and the pin 4. You can leave it there.

The shock wave generating explosive 7 may be any explosive as long as it explodes with the impact force when the tip of the pin 4 collides with the flat surface 3 of the pedestal 3A; for example, it may be an insensitive explosive. , or a combination of an insensitive initiator and an insensitive igniter can be used. This shock wave generating explosive 7
The amount used is.

It is usually several 10 mg.

An example of an insensitive detonator is the horse mackerel and other ships. Insensitive horse mackerel can be obtained by converting the crystals into needle crystals, and the needle crystals of horse mackerel can be easily obtained by adjusting the conditions at the time of delivery, such as increasing the temperature of the mother liquor. can.

However, insensitive detonators are likely to explode with the slightest impact, so handling them may be inconvenient.

Therefore, in the present invention, it is desirable to use a combination of an insensitive priming charge and an insensitive ignition charge.

Examples of insensitive explosives include mixtures of horse mackerel, alundum, antimony trisulfide, calcium silicite, and the like.

Further, as an insensitive igniter, for example, tricinate can be used.

When using an explosive consisting of a combination of an insensitive ignition charge and an insensitive ignition charge, as shown in FIG. It is preferable to provide an insensitive explosive 12 at the tip of the pin 4 so as to wrap it around the pin 4.

As shown in FIG. 5, if the shock wave generating explosive 7 is to be loaded into the tip of the pin 4, a cover 13 covering the shock wave generating explosive 7 can be detachably attached to the tip of the pin 4. It is preferable to attach it.

Then, the cover 13 is removed when using this processed product for generating shock waves.

Furthermore, when using the shock wave generating explosive 7 consisting of a combination of an insensitive initiator 12 and an insensitive ignition charge 11, the tip of the pin 4 is used as shown in FIG.

An insensitive igniter 12 may be loaded so as to wrap around the protrusion 6, and an insensitive igniter 11 may be provided on the surface of the insensitive igniter 12 facing the pedestal 3A.

In addition, in the pin 4 shown in Fig. m6, a protrusion 6 is provided at the tip of the pin 4 via a support stand 14, but when the support stand 14 is interposed in this way, the protrusion during impact This is advantageous because it can prevent the sitting bending of 6.

The pin 4 may be driven forward toward the pedestal 3A by the solenoid 8 as in the above embodiment, but
The point is that it is sufficient to move the pin 4 forward toward the pedestal 4A, so other suitable driving means can be employed as appropriate.

Other driving means include those that utilize mechanical force such as the biasing force of a spring, and those that utilize gravity such as free fall.

[Effects of the Invention] The shock wave generating processed product according to the present invention can generate shock wave generating explosives by colliding the tip of the pin with the plane of the pedestal placed at the focal point and striking the shock wave generating explosive with the pin. can be detonated, creating a shock wave.

As described above, this processed product for generating shock waves has a simple structure, so manufacturing operations such as assembly can be facilitated, and manufacturing costs can be reduced.

Furthermore, the pin in this processed product for shock wave generation is
Essentially, it is sufficient to have a structure that collides with or hits one pedestal, so there is no need for it to have a particularly complicated shape.For example, if it is formed into a cylindrical shape, it will be possible to continuously generate #1 waves. This shock wave generating workpiece makes it possible to continuously generate shock waves.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view showing another example of the pin, and Figs. 3 and 4 are longitudinal sectional views showing examples of arrangement of explosives for generating shock waves. This figure, as well as FIGS. 5 and 6, are longitudinal sections showing the tip of the pin. 1... Stone crushing device, 2... Elliptical reflector, 3. Salary.
Plane, 3A...Pedestal, 4...Pin, 6-...Protrusion,
7... Explosive for generating shock waves, ll... Ignition powder, 12.
・φ Insensitive detonator. Funeral Figure 2 Figure 4 - Figure 5 Figure 6 I Procedural amendment October 29, 1985 l Indication of the case 1985 Patent Application No. 199919 2 Name of the invention Pyrotechnics for generating shock waves 3 Make amendments Relationship with patent applicant case Patent applicant 4 Agent 1
□′・ Zuko”′ Address 6-3-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo ′
-Karakawa Yoru 2nd Floor 6 Number of inventions increased by amendment 07 Target of amendment Column 8 of “Claims” and “Detailed Description of the Invention” Contents of amendment (1) “Scope of Claims” The description will be amended as shown in the attached sheet. (2) Delete "Also...matches." written in lines 13 to 14 of page 5 of the specification. (3) On page 6, line 11 of the specification, after the word ``cannot'' be written, ``Also, due to the powerful laser,
There is a risk of secondary damage to the patient and operator. ”
join. (Page 6, line 20 of the specification, page 7, line 14)
line, 8th page, 11th line, 14th page, 9th line, 15th page, 11th line, 15th page, 16th line, 1st
"Processed products" written in line 20 of page 5 and line 5 of page 16 are corrected to "pyrotechnic products." (5) “Horse horse mackerel and other ships” listed on page 13, line 4 of the II specification is replaced with “horse mackerel and other ships, silver azide, copper azide, and horse mackerel and other ships, antimony trisulfide, alundum, calcium silicite, etc.” sensitizer”. (6) On page 13, lines 14 to 16 of the specification, "for example..." is replaced with "for example, dextrin, hydroxide, and diazodinitrophenol (DDNP)." (7) Insert "a mixture of tetracene, red phosphorus, potassium chlorate, antimony trisulfide, etc." between "nate" and "use" on page 13, line 8 of the specification. . “Claims” of Patent Application 1986-199919 r+
amend the description as follows. (1) In a shock wave generating pyrotechnic device that generates a shock wave by detonating an explosive at the focal point of an elliptical reflector in a stone crushing device, a pedestal is placed at the focal point of the elliptical reflector, and the pedestal is A pin is placed opposite to the pedestal, and a shock wave generating explosive that can be detonated by impact is placed anywhere from the tip of the pin to the pedestal, A shock wave generating pyrotechnic device characterized in that the shock wave generating explosive is detonated and a shock wave is generated at the focal point by colliding a surface with the pedestal. The pyrotechnic for generating shock waves according to claim 1, which is an explosive. (3) The explosive is a dextrin horse mackerel and/or
or diazodinitrophenol (4) The artificial shock wave generating agent according to claim 2, wherein the shock wave generating explosive comprises an insensitive initiator and a sensitive igniter. Pyrotechnics for generating shock waves as described in . Qri 1 The shock wave generating explosive is a mixture of any of the sensitizers such as alundum, antimony trisulfide, and calcium silicite, and other ships, and the explosives are a mixture of aji and other ships, and the azide is a combination of aji and other ships. The pyrotechnic product for generating shock waves according to claim 1. Claims 1 to 5, wherein the shock wave generating explosive is an insensitive primer, and a conical recess is formed in the tip end surface of the pin on which the shock wave generating explosive is disposed. A pyrotechnic device for generating shock waves as described in any of the above. Qri1 The shock wave generating explosive is the tip of the pin rni
The shock wave generating pyrotechnic device according to any one of Items 1 to 1 of the claim box IM, which is loaded into a pyrotechnic device. C. The shock wave generating pyrotechnic device according to any one of claims 1 to 8, wherein the shock wave generating explosive is loaded into a pedestal. (10) The shock wave generating pyrotechnic device according to claim 1 or claim 6, wherein the pin has a protrusion on its distal end face facing the pedestal,” Procedural Amendment 1985 November 8th 1 Display of 21S Patent Application No. 199919 of 1985 2 Name of the invention Pyrotechnics for generating shock waves 3 Relationship with the case of the person making the amendment Patent applicant address 25104 Kusabana, Akino 11 City, Tokyo Agent Address 2nd floor 7, Karakawa Building, 6-3-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Subject of amendment: -, ), Door 1 in the "Contents of amendment" of the written amendment submitted to the Government Office on October 29, 1985
-＋□ 8 Contents of the Amendment The statement in the seventh item (7) in the ``Contents of Amendment'' column of the written procedural amendment submitted on IO month 29, 1985.
13th page, line 8” is corrected to “page 13, line 18”.

Claims (9)

[Claims] (1) In a shock wave generating pyrotechnic device that generates a shock wave by detonating an explosive at the focal point of an elliptical reflector in a stone crushing device, a pedestal is placed at the focal point of the elliptical reflector, and a pin is attached so that it can rush towards the pedestal. is placed opposite to the pedestal, and a shock wave generating explosive that can be detonated by impact is placed anywhere from the tip of the pin to the pedestal, and the tip of the pin is placed opposite to the pedestal. A processed product for generating shock waves, characterized in that the explosive for generating shock waves is exploded by colliding with each other to generate shock waves at the focal point. (2) The processed product for generating shock waves according to claim 1, wherein the explosive for generating shock waves is a sensitive detonator. (3) The processed product for generating shock waves according to claim 2, wherein the explosive is lead azide. (4) The processed product for generating shock waves according to claim 1, wherein the explosive for generating shock waves has an insensitive initiator and a sensitive igniter. (5) The insensitive explosive is a mixture of alundum, antimony trisulfide, and calcium silicite with lead azide, and the ignition agent is tricinate. Processed product for generating shock waves. (6) The shock wave generating explosive is an insensitive initiating explosive, and the pin on which the shock wave generating explosive is disposed has a conical recess formed in the distal end surface thereof. Processed product for generating shock waves as described. (7) The shock wave generating pyrotechnic device according to any one of claims 1 to 6, wherein the shock wave generating explosive is loaded onto the tip end surface of the pin. (8) The shock wave generating pyrotechnic device according to any one of claims 1 to 6, wherein the shock wave generating explosive is loaded into a pedestal. (9) The shock wave generating processed product according to any one of claims 1 to 5, 7, and 8, wherein the pin has a protrusion on its end surface facing the pedestal.