JPH0429267Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to an electronic detonator, that is, a staged electric detonator with high time accuracy incorporating an electrical time delay circuit.

(Prior art) Conventionally, the structure of most electronic detonators was
As shown in Japanese Patent Application Publication No. 43454, Japanese Patent Application Laid-open No. 57-142498, and Japanese Patent Publication No. 56-26228, an output terminal comes out from one end of an electrical delay circuit, and this output terminal is connected to an ignition device. It formed part of the

Furthermore, as shown in Japanese Utility Model Application Laid-Open No. 59-64935, an electronic detonator has been proposed which has a structure in which an instantaneous electric detonator and an electric time delay device are connected by a connector.

(Problem that the invention aims to solve) By the way, it has already been a long time since the structure of the general electric detonator used today was developed, and during that time, sufficient studies regarding the production process have not been conducted. As a result, most manufacturers now carry out production using automatic or semi-automatic production processes that are suitable for current electric detonator designs. However, Japanese Patent Application Laid-Open No. 54-43454,
JP-A-57-142498 and JP-A-56-26228
The electronic detonator shown in the publication has a different structure from a general electric detonator because the output terminal forms part of the ignition device, and it cannot be used in the automatic or semi-automatic production process currently in use. There was a problem that it could not be produced using . Therefore, when manufacturing such electronic detonators,
It is necessary to set up a new production process or improve the equipment for the existing automatic or semi-automatic production process.

Furthermore, the electronic detonator shown in Japanese Utility Model Application Publication No. 59-64935 has an advantage in that the current instantaneous electric detonator is used as is in the detonator section, so there is no need to change the existing production process. However, on the other hand, since it is necessary to connect the instantaneous electric detonator and the electric time delay device with a connector, there is a problem in that the connecting portion must be processed into a connector.
Furthermore, simply connecting the instantaneous electric detonator and the electric detonator with a connector as described above may cause water resistance problems such as water intrusion into the electric time delay device or the instantaneous electric detonator under water pressure, or the problem of water resistance at the joint. There was also a problem that there was a risk of electrical energy leaking during ignition, which required special consideration.

The object of the present invention is to provide an electronic detonator which has good water resistance by integrating an instantaneous electric detonator and an electric time delay device, and which is free from the risk of electrical energy leaking during ignition.

(Means and effects for solving the problems) The electronic detonator of the present invention is an electronic detonator that combines an instantaneous electric detonator and an electric time delay device.
An embolization protrusion is provided on the embolus of the instantaneous electric detonator, and a connection part connected to a lead wire of the embolization protrusion is soldered to one end of the electrical delay device, and the other end is fitted with the electrical delay device. by connecting the tube to the embolic connection part of the tube, then fitting the tube to the embolization protrusion and the electrical delay device, and caulking the rubbing portion of the tube and the embolization protrusion. It is characterized by being integrated.

According to the present invention, an electronic detonator is constructed by integrating an instantaneous electric detonator and an electric time delay device, which is similar to the well-known Japanese Utility Model Application Publication No. 59-64935. The problems of Japanese Utility Model Application Publication No. 59-64935 can be completely solved.

(Example) Hereinafter, one embodiment of the present invention will be described with reference to FIG. 2.

As described above, the electronic detonator of the present invention integrates the instantaneous electric detonator 9 and the electric time delay device 4. That is, first, the lead wire 1 through which the current flows is fixed to the tube body 2 via the embolus 3. At this time, the lead wire 1 is inserted into the embolus 3 on one side of the tubular body 2, and a connecting portion 5 is formed by the leading end of the lead wire 1 and the connecting wire of the electric time delay device 4 housed in the tubular body 2. A connection part 6 is also connected to the side opposite to the connection part 5 of the electrical time delay device 4 by the connection conductor, the other embolization protrusion 7A of the tube body 2, and the lead wire 8 passing through the embolus 7.
Configure. These connections 5 and 6 are achieved, for example, by soldering.

Next, the tube body 2 is fitted over the embolus 3, the electrical delay device 4, and the embolus 7 that are electrically connected in this way, and the tube body 2, the embolus 3, and the embolus protrusion 7 are connected.
It is integrated by caulking the rubbing part with A. Next, one end of the instantaneous electric detonator 9 is fitted onto the embolus 7, and the rubbed portion is caulked to form an electronic detonator. The embolus 7 and its protruding portion 7A interconnect the electrical time delay device 4 and the instantaneous electric detonator 9 in an airtight manner to integrate them, and connect the lead wire of the instantaneous electric detonator 9 to the output terminal of the electric time delay device 4. so that it can be sealed tightly. The instantaneous electric detonator used in this invention must satisfy the following requirements.

First, it is necessary that the instantaneous electric detonator 9 has an embolic projection 7A. Furthermore, the outer diameter of this embolic protrusion 7A needs to be slightly smaller than the inner diameter of the tube body 2 so that this portion can be smoothly inserted into the tube body 2 in which the electric time delay device 4 is housed. . Further, the embolization protrusion 7A is connected to the tube body 2.
After inserting it into the body, it is made to be caulked by using the rubbing part, but in terms of strength, the caulking part 1 is
If two or more 0's are provided, the length of the embolic protrusion 7A needs to be 5 mm or more. That is, even if only one caulking part 10 is provided, no particular problem will occur, but compared to the case where two or more are provided, the water resistance performance may be lowered, and bending force acting on the caulking part as a fulcrum may occur. If this happens, there is a risk that the caulking may come off, so it is desirable to provide two or more.

Therefore, compared to the conventional instantaneous electric detonator, although the shape of the embolus 7 is slightly different, the other structures and dimensions may be exactly the same. The embolus 7 is usually manufactured by injection molding thermoplastic resin in a mold, so all that is required to change the equipment is to change the conventional mold to a mold with a shape that suits the purpose. . In this injection molding process, there are no explosives around, so it is very easy to change the equipment to this extent.

The tube body 2 in which the electric time delay device 4 is housed is
Since it is caulked at the portion where it rubs against the embolus protrusion 7A, it is preferable to use a thin metal pipe. For example, it is preferable to use a copper or aluminum pipe with a wall thickness of 0.2 to 0.3 mm.

(Effects of the Invention) As described above, the electronic detonator of the present invention can be manufactured without making any major changes to the existing electric detonator production process. Further, since the connection between the lead wire of the instantaneous electric detonator and the output terminal of the electric time delay device is sealed, there is no risk of ignition energy leaking. Therefore, the present invention is very useful in practice.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing an embodiment of the electronic detonator of the present invention, and FIG. 2 is a plan sectional view thereof. 1... Lead wire, 2... Tube body, 3... Embolus, 4
...Electrical time delay device, 5, 6... Connection part, 7...
Embolus, 7A... Embolic protrusion, 8... Lead wire, 9
... Instantaneous electric detonator, 10 ... Caulking part.

Claims (1)

[Scope of utility model registration request] In an electronic detonator that combines an instantaneous electric detonator and an electrical time delay device, an embolic protrusion is provided on the embolus of the instantaneous electric detonator, and a connecting portion connected to a lead wire of the embolic protrusion is connected to the electric detonator. soldering to one end of the time delay device and connecting the other end to an embolic connection of a tube housing the electric time delay device, and then fitting the tube to the embolic protrusion and the electrical time delay device; An electronic detonator characterized in that the tube body and the embolization protrusion are integrated by caulking a rubbing portion of the tube body and the embolization protrusion.