KR20220126868A - Inertial igniting device for thermal batteries - Google Patents

Abstract

The present invention relates to an inertial igniting device for a thermal battery comprising: an outer shape unit coupled to the upper end of a thermal battery and provided with an internal space and a flame hole communicating with the thermal battery through the lower end thereof; a gunpowder unit formed on the lower surface of the internal space, and mounted on a gunpowder unit mounting groove communicating with the flame hole; an elastic support unit formed along the inner wall of the internal space, and elastically deformable in the height direction of the outer shape unit; a shear unit supported on the upper end of the elastic support unit, and provided with a striking unit hole formed in the middle thereof; and a striking unit inserted into the striking unit hole to be supported on the shear unit. When the shear unit undergoes shearing by an inertial force, the striking unit strikes the gunpowder unit. According to the present invention, the inertial igniting device always operates to activate a thermal battery in an impact amount (or acceleration) condition matching a shell launching environment and always does not operate to prevent the thermal battery from being activated in an impact amount (or acceleration) condition which can occur during storage, transport, maintenance, and repair of the shell. Moreover, the inertial igniting device is favorable in reducing the size of a thermal battery system, improves operational reliability, and reduces manufacturing efforts and costs.

Description

Inertial ignition device for thermal cells

The present invention relates to an inertial ignition device for a thermo cell, and more particularly, a separate external power supply device when an existing electric ignition device cannot be used due to space and weight constraints in a thermo cell applicable to small shells and warheads. It relates to an inertial ignition device for a thermocell that ignites the thermocell by using the acceleration conditions accompanying the firing of a shell and warhead without it, and prevents ignition of the thermocell under acceleration conditions other than the launch environment.

In recent years, various sensors and electronic components have been widely applied for multifunctionality or intelligence of small shells and warheads. The development of a power supply for small shells and warheads to drive these active components is considered a key technology in the development of multifunctional or intelligent small shells and warheads.

Examples of power supplies for shells and warheads include inductively coupled power supplies, electromagnetic inductive inertial generators, piezoelectric power supplies, liquid-preserving batteries, and thermal cells. Among them, the thermal cell is a power supply device that generates electrical energy by igniting a solid electrolyte by using the ignition device to ignite a heat paper and a heat pellet by spraying a flame when the ignition device is operated by an external signal. Since the thermal battery can be stored for a long time and has superior specific power compared to other power devices, it is suitable as a power supply for small shells and warheads.

For this purpose, the ignition device for a thermocell is a device that is ignited by an external signal, and the electric type and the inertial type (or shock type) are representative methods. Among them, the electric ignition device requires a separate external power source, so its application to small shells and warheads is limited.

On the other hand, the inertial ignition device is a method of igniting the thermal paper in the thermocell by using the backward acceleration accompanying the firing of a shell without a separate external power supply to cause the striking part in the ignition device to operate the shock-type powder part. Therefore, the inertial ignition device for thermoelectric cells applicable to small shells and warheads always operates under the conditions of the amount of impact (or acceleration) that match the shell firing environment, and the amount of impact (or acceleration) that can occur during storage, transportation, and maintenance of the shells. The condition should always be inactive.

One of the inertial ignition devices for thermal cells is disclosed in Korean Patent Application Publication No. 2012-0027874, which is Patent Document 1, and another inertial ignition device for thermal cells is disclosed in US Patent Publication No. US 2008/0041262 A1, which is Patent Document 2. has been disclosed.

Patent Document 1 is characterized in that the striking part triggers the gunpowder part with the repulsive force of the spring compressed during assembly by releasing the locking device using centrifugal force, which is one of the inertial forces generated when the shell is fired. The inertial ignition device according to Patent Document 1 is disadvantageous in long-term storage due to deterioration due to creep of the compressed spring. In addition, there is a problem in that operation reliability is limited and manufacturing cost is increased due to a complex structure having a plurality of components such as a restraining part, an elastic part, and a moving part in order to implement an always operating condition and an always non-operating condition.

The Patent Document 2 is an inertial ignition device characterized in that it implements a mechanical delay by having a two-stage restraining unit and a moving unit without an elastic unit. The inertial ignition device according to Patent Document 2 always operates under the condition of the amount of impact (or acceleration) that matches the shell firing environment, and it is always rain under the condition of the amount of impact (or acceleration) that can occur during storage, transportation, and maintenance of the shell. It has a problem that it cannot meet the requirements to operate.

The matters described in the above background art are intended to help the understanding of the background of the invention, and may include matters that are not already known to those of ordinary skill in the art to which this technology belongs.

Korean Patent Application No. 10-2012-0027874 (Title of the invention: Thermo-cell activation device for shells) US Patent Application US 2008/0041262 A1 (Title of the invention: Mechanical delay mechanisms for inertial igniters for thermal batteries and the like)

The present invention has been devised to solve the above problems, and the present invention is always operated under the conditions of the amount of impact (or acceleration) consistent with the shell firing environment to activate the thermal cell, and the amount of impact that can occur during storage, transportation and maintenance of the shells For thermal cells whose structure and operating principle are simplified so that they are not always operated under (or accelerated) conditions to prevent activation of the thermal cell, improve the miniaturization of the thermal cell system, improve operational reliability, and reduce manufacturing effort and cost An object of the present invention is to provide an inertial ignition device.

An inertial ignition device for a thermocell according to one aspect of the present invention is coupled to an upper end of a thermocell, an inner space is formed, an outer portion having a flame hole passing through the lower end to communicate with the thermocell, is formed on the lower surface of the inner space and a gunpowder part mounted in a gunpowder part mounting groove communicating with the flame hole, an elastic support part that is formed along the inner wall surface of the inner space, and is elastically deformable in the height direction of the outer part, is supported on the upper end of the elastic support part, When the front end is sheared by an inertial force, including the front end having a striking hole in the center, and the striking portion inserted into the striking hole and supported by the front end, the striking unit strikes the gunpowder portion characterized.

In addition, the front end includes an inner ring having the hitting part hole formed therein, an outer ring having a larger diameter than the inner ring, and a plurality of supports connecting the inner ring and the outer ring.

Further, the shear hole formed between the inner ring and the outer ring is characterized in that the sector shape.

In addition, a notch in the form of a concentric circle with the striking hole may be formed on the upper surface of the front end.

Here, the front end portion is characterized in that when the inertial force greater than the reference inertia force is applied to the front end for more than a reference time, it is sheared.

And, it is characterized in that the front end is not sheared when an inertial force less than a reference inertial force is applied to the front end or an inertial force is applied for a reference time or less.

On the other hand, the striking portion, the insertion portion inserted into the striking portion hole, the outer diameter is formed to expand from the upper end of the insertion portion, the upper extension portion supported on the upper surface of the front end portion, the outer diameter is formed to expand from the lower end of the insertion portion, the It includes a lower extension supported on the lower surface of the front end and a tip protruding downward from the center of the lower end of the lower extension.

Alternatively, the striking part is partially inserted into the striking part hole, the outer diameter is formed to be expanded than the inserted part, the upper body supported on the upper surface of the front end part, is partially inserted into the striking part hole, and the outer diameter is expanded than the inserted part It is formed and includes a lower body supported on the lower surface of the front end and a tip protruding downward from the center of the lower end of the lower body, wherein the upper body and the lower body are screw-coupled.

Alternatively, the striking portion, the insertion portion inserted into the striking portion hole, the outer diameter is formed to extend from the upper end of the insertion portion, the upper extension and the lower extension supported on the upper surface of the front end protruding downward from the center of the lower end Includes tip wealth.

In addition, a step portion is formed at an upper end of the inner space, an upper space having a smaller diameter than the inner space is formed, and the step portion is in contact with an upper surface of the front end portion.

In addition, a fixing portion protruding to an inner diameter corresponding to the outer diameter of the gunpowder portion may be formed on the inner lower surface of the inner space.

On the other hand, the outer portion includes a body forming a lower end and a side portion of the outer portion and a cover covering the upper surface of the body, the lower end of the cover protrudes downward, and a protrusion having an outer diameter corresponding to the outer diameter of the front end portion It is characterized in that it is formed.

Next, the inertial ignition device for a thermo cell according to another aspect of the present invention is coupled to the upper end of the thermo cell, an inner space is formed, and an outer part having a flame hole communicating with the thermo cell through the lower end is formed, the inner space The gunpowder part is formed on the lower surface of the and is mounted in the gunpowder part mounting groove communicating with the flame hole, the elastic support part is formed along the inner wall surface of the inner space, and is elastically deformable in the height direction of the outer part, the upper end of the elastic support part and a front end portion having a striking portion hole formed in the center and a striking portion inserted into the striking portion hole and supported on the front end portion, wherein the front end portion includes an inner ring having the striking portion hole formed therein, the inner ring It comprises an outer ring having a larger diameter and a plurality of supports connecting the inner ring and the outer ring, and a notch in the form of a concentric circle with the striking hole is formed on the upper surface of the front end.

Here, the shear hole formed between the inner ring and the outer ring is characterized in that the sector shape.

And, the front end portion is characterized in that when the inertia force greater than the reference inertia force is applied to the front end for more than a reference time, it is sheared.

In addition, it is characterized in that the front end is not sheared when an inertial force less than a reference inertial force is applied to the front end or an inertial force is applied for a reference time or less.

In addition, a fixing portion protruding to an inner diameter corresponding to the outer diameter of the gunpowder portion may be formed on the inner lower surface of the inner space.

Next, the inertial ignition device for a thermo cell according to another aspect of the present invention is coupled to the upper end of the thermo cell, an inner space is formed, and an outer part having a flame hole communicating with the thermo cell through the lower end is formed, the inner space The gunpowder part is formed on the lower surface of the and is mounted in the gunpowder part mounting groove communicating with the flame hole, the elastic support part is formed along the inner wall surface of the inner space, and is elastically deformable in the height direction of the outer part, the upper end of the elastic support part is supported, and includes a striking portion extending downwardly from the center of the front end and the lower surface of the front end having a striking hole in the center, and when the front end is sheared by an inertial force, the striking portion is the gunpowder It is characterized by hitting.

In addition, the front end includes an inner ring having the hitting part hole formed therein, an outer ring having a larger diameter than the inner ring, and a plurality of supports connecting the inner ring and the outer ring.

In addition, the shear hole formed between the inner ring and the outer ring is characterized in that the sector shape.

In addition, a notch in the form of a concentric circle with the striking hole may be formed on the upper surface of the front end.

So, the front end portion is characterized in that when the inertial force greater than the reference inertia force is applied to the front end for more than a reference time, it is sheared.

In addition, it is characterized in that the front end is not sheared when an inertial force less than a reference inertial force is applied to the front end or an inertial force is applied for a reference time or less.

The inertial ignition device for a thermocell according to the present invention activates the thermocell by using the amount of impact (or acceleration) involved when the shell is fired without a separate external power supply. do.

In addition, it always operates under the condition of the amount of impact (or acceleration) that matches the shell firing environment to activate the thermal cell, and it is always inactive under the condition of the amount of impact (or acceleration) that can occur during storage, transportation, and maintenance of the shell to prevent activation of the heat cell Thus, the operational stability of the thermocell for the small shell and warhead is ensured.

In addition, the inertial ignition device for a thermo cell according to the present invention has a simple structure and operating principle, thereby improving the operational reliability of the inertial ignition device and reducing manufacturing effort and cost. In addition, it can contribute to the increase in the power of the shell through the miniaturization of the inertial ignition device.

1 schematically shows a multifunctional or intelligent cannonball equipped with an inertial ignition device for a thermo cell of the present invention.
FIG. 2 is a graph conceptually illustrating a non-operating acceleration condition of an inertial ignition device for a thermal cell, and FIG. 3 is a graph conceptually illustrating an operating acceleration condition.
4 illustrates an inertial ignition device for a thermo cell according to an embodiment of the present invention.
5 is a view showing a compressed state and an inactive state of the inertial ignition device for a thermo cell according to an embodiment of the present invention.
6 is a view showing a compression state and an active state of the inertial ignition device for a thermal cell according to an embodiment of the present invention.
7 is a view showing an inertial ignition device for a thermal cell according to another embodiment of the present invention.
8 is a view showing various embodiments of the front end of the inertial ignition device for a thermo cell of the present invention.
9 is a view showing various embodiments of the striking part of the inertial ignition device for a thermo cell of the present invention.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

In describing preferred embodiments of the present invention, well-known techniques or repetitive descriptions that may unnecessarily obscure the gist of the present invention will be reduced or omitted.

The present invention relates to an inertial ignition device for a thermo cell, and embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, in describing a preferred embodiment of the present invention with reference to the accompanying drawings, the same reference numerals are used for the same components, and detailed descriptions may be omitted. On the other hand, 'impact amount' means a physical quantity with magnitude and direction indicating the degree of impact acting on the components inside the shell when the shell is fired, and is calculated as the area under the graph of force and time. In addition, 'acceleration' is calculated by dividing the most prominent backward inertia force among the backward inertia force generated when the shell is fired, the swing load, the forward inertial force that the shell receives when it deviates from the gun or the cannon, and the centrifugal force that the shell receives when it is fired from a steel gun or a steel gun. A value indicates the level of the backward inertia force.

Recently, in order to improve the accuracy of small shells and warheads and maximize their effectiveness, they are becoming more multifunctional and intelligent. In line with this trend, active components such as various sensors and electronic components are being widely applied to conventional small shells and warheads. Therefore, multi-functional or intelligent shells and warheads require various types of power supplies to be loaded inside. Power devices for shells and warheads that have been developed or are currently under development include an inductively coupled power supply, an electromagnetic inductive inertial generator, a piezoelectric power supply, a liquid-preserving battery, and a thermal battery. Among them, the thermal battery has very little degradation in performance even after a long period of time, the output per unit weight is very high compared to other power supplies, and the time required for activation is short, so it is suitable as a power supply for multifunctional or intelligent shells and warheads.

A thermo cell is a battery using molten salt as an electrolyte. When the ignition device is operated by an external signal, the ignition device injects a flame to ignite the thermal paper and the hot plate, and melts the electrolyte in the form of molten salt to generate electricity. will create In order to activate the thermo cell, the internal operating temperature must be heated to 500°C, which requires a pyrotechnic component. The ignition device among the pyrotechnic components is a device that is ignited by an external signal, and typical methods include an electric type and an inertial (or impact type) type. The electric ignition device uses a separate external power source to ignite, so it is not desirable to apply it to small shells and warheads whose internal space is limited. On the other hand, in the inertial ignition device, the striking part in the ignition device operates the gunpowder part by using the backward acceleration accompanying the firing of a shell without a separate external power supply, and furthermore, the thermal battery is activated through thermal paper, so it can be applied to small shells and warheads. It is preferable as an ignition device for a thermo cell. However, in implementing the inertial (or impact) ignition device, it always operates under the condition of the amount of impact (or acceleration) that matches the shell firing environment, and the amount of impact (or acceleration) that can occur during storage, transportation, and maintenance of the shell Conditions always require a technique to disable them.

1 is a multifunctional or intelligent cannonball equipped with an inertial ignition device for a thermal cell according to an embodiment of the present invention. The multifunctional or intelligent shell 1 includes an electronic component 30 such as a sensor therein, and a thermal cell 20 is connected to the electronic component 30 as a power supply for driving the same, and the thermal cell 20 is An inertial ignition device 10 for thermal cells for activation is located above the thermal cells 20 . In the drawing of the multifunctional or intelligent shell 1, the upper end is the warhead and the lower end is the tanmi. When a shell is fired, a backward inertial force is generated inside the shell in the direction from the warhead to the fin, and the ignition device 10 ignites the thermocell 20 by such a backward inertial force.

2 to 3 are graphs showing always operating and non-operating acceleration conditions according to an embodiment of the present invention. Here, 'a' and 't' mean the magnitude and duration of the acceleration operating in the inertial ignition device 10 for a thermocell, respectively. Also, the subscript 'af' is an abbreviation of 'all-fire', which means always working, and 'nf' is an abbreviation of 'no-fire', which means always not working. In general, the acceleration accompanying the firing of a shell has a size of tens of thousands of g's and a duration of several to tens of msec, whereas the acceleration generated during storage, transportation, transportation and maintenance of the shell is in the size of several thousand to several g's and 0.1~ It has a duration of 1.0 msec. Accordingly, the inertial ignition device 10 for the thermal cell is always operated according to the acceleration conditions accompanying the firing of the shell, and it should always be inactive at the acceleration generated during storage, transportation, transportation, and maintenance of other shells.

More specifically, the inertial ignition device 10 for a thermocell according to the present invention is operated when the inertial force acting on the inertial ignition device 10 for a thermocell is equal to or greater than the reference inertial force, and the magnitude of the acceleration is a _af or more and is continuous. It should always be activated when the time is greater than t _af (reference time). In addition, when the magnitude of the acceleration acting on the inertial ignition device 10 for a thermal cell is less than a _nf or the duration is less than or equal to t _nf , it should always be inactive.

Here, a _af and a _nf may be different values, and a _af may be a larger value than a _nf .

Similarly, t _af and t _nf may be different values, and t _af may be a value greater than t _nf .

Hereinafter, an inertial ignition device for a thermo cell according to an embodiment of the present invention will be described with reference to FIG. 4 .

The inertial ignition device 10 for a thermocell according to an embodiment of the present invention includes an outer portion 100 , a gunpowder portion 110 , an elastic support portion 120 , a front end portion 130 , and a striking portion 140 . , the hitting unit 140 hits the gunpowder unit 110 so that the thermal cell 20 coupled to the lower end is ignited by the flame generated by the gunpowder unit 110 .

The outer part 100 is a frame in which an inner space is formed in a cylindrical shape, and is coupled to the upper end of the thermal cell 20 .

A gunpowder part mounting groove 105 is formed on the lower surface of the inner space, the gunpowder part 110 is inserted into the gunpowder part mounting groove 105, and the gunpowder part 110 is partially exposed to the top of the gunpowder part mounting groove 105. It is preferable to be

In addition, a flame hole 101 communicating with the thermal cell 20 is formed from the gunpowder part mounting groove 105 through the lower end of the outer part 100 so that the flame when the explosives part 110 explodes is the flame hole 101 . is transmitted to the thermal cell 20 through the

The outer part 100 may be integrally formed as shown in FIG. 4 , and may include a body 103 including a lower end and a side part and a cover 102 covering the upper surface of the body 103 as shown in FIG. 5 or less.

The elastic support unit 120 is formed along the inner space inner wall surface of the outer portion 100, and may be formed around the entire inner wall surface along the inner space inner wall surface, or may be partially formed.

The elastic support unit 120 is formed at a constant height so that displacement may occur elastically in the vertical direction and the longitudinal direction of the shell as shown.

The elastic support part 120 is an element that absorbs shock, and the elastic support part is compressed to the maximum compression state only under the condition of an impact amount (or acceleration) having a large magnitude of acceleration corresponding to the shell firing environment and a long duration, and the front end part A force is applied to the area between the front end holes 132 of the 130 to cause breakage, and the striking part 140 is released when the front end part 130 is broken to operate the gunpowder part 110 . will move On the other hand, when an acceleration having a large size and a short duration acts on the inertial ignition device 10 for a thermal cell, the elastic support unit 120 is not compressed to the maximum, so that it is located between the front end holes 132 of the front end 130 . Sufficient force is not transmitted and the restraint of the front end of the front end 130 and the striking unit 140 through this is not released. In addition, even when the small size and long duration acceleration acts on the inertial ignition device 10 for a thermocell, the front end 130 is not sheared so that the striking unit 140 strikes the gunpowder unit 110 . By disabling it, it is always possible to implement a non-actuated acceleration condition.

In the case of the integrated outer part 100, as shown in the figure, a step is formed at the upper end to form an upper space having a smaller diameter than the inner space, and the upper end of the front end 130 and the elastic support unit 120 is separated by the step. It may be configured to be supported.

Next, a shear part 130 supported on the upper end of the elastic support part 120 is configured to cover the upper surface of the elastic support part 120 .

The front end 130 is an annular sector (annular sector) including an inner ring 131 and an outer ring 132, double annular, provided in the spaced apart space of the inner ring 131 and the outer ring 132 inner ring A support 133 for connecting and supporting the 131 and the outer ring 132 is provided.

The support 133 is provided in plurality, and may be formed of four supports 133 or two supports as shown.

A striking part hole 134 is formed inside the inner ring 131 , and the striking part 140 penetrates the striking part hole 134 and is coupled thereto.

In addition, the shear hole 135 is formed between the inner ring 131 and the outer ring 132 to adjust the shear force of the front end part 130 . The number of shear holes 135 may be plural depending on the number of supports 133 , and may be arranged at equal intervals from each other.

The shear hole 132 is preferably in a fan-shaped planar shape as shown.

And, the striking part 140 is composed of an insertion part 141 , an upper extension part 142 , a lower extension part 143 , and a tip part 144 .

The insertion part 141 is a part inserted into the striking part hole 131 of the front end 130, and the upper extension 142 is provided in a form in which the outer diameter is extended from the upper end of the insertion part 141, the front end ( 130 , and the lower extension 143 is provided in a form in which an outer diameter is extended from the lower end of the insertion portion 141 , and is supported on the lower surface of the front end 130 .

Then, the tip portion 144 is configured to protrude downward from the center of the lower end of the lower extension portion 143 so that the hitting can be made better.

Next, a method of always satisfying the non-operating acceleration condition of the inertial ignition device for a thermal cell according to an embodiment of the present invention will be described in detail with reference to FIGS. 5A and 5B . FIG. 5( a ) shows a state in which the elastic support part 120 is compressed by the acceleration applied to the inertial ignition device 10 for a thermocell described above. FIG. 5(b) is a view showing a state in which the original state is restored after the duration of the acceleration is over. Regardless of the magnitude of the acceleration applied to the inertial ignition device 10 for a thermocell, when the duration is shorter than t _nf , the duration is short, so that the elastic support part 120 is not maximally compressed and even without shear of the front end part 130 . It returns to the state of 5(b). In addition, when the magnitude of the acceleration applied to the inertial ignition device 10 for a thermal cell is smaller than a _nf regardless of the duration, the elastic support part 120 is in the maximum compression state, but the front end hole of the front end part 130 ( 132) The force acting on the liver is smaller than the force required for the front end of the front end 130, so the shear does not occur, and the restraint of the striking unit 140 is not released. It will return to the state of (b).

In addition, in the inertial ignition device 10 for a thermocell, after the striking unit 140 shears the front end 130 only by the acceleration generated in the shell firing environment (that is, the inner ring 131) the striking unit The support 133 can be sheared while being coupled to the 140.) By moving through the hollow of the elastic support 120 and striking and operating the gunpowder part 110, an operating acceleration condition can always be implemented. At this time, the kinetic energy of the striking unit 140 is equal to or greater than the energy required to operate the gunpowder unit 110 .

A method of always satisfying the operating acceleration condition of the inertial ignition device for a thermal cell according to an embodiment of the present invention will be described in detail with reference to FIGS. 6(a) and 6(b). FIG. 6( a ) shows a state in which the elastic support unit 120 is compressed to the maximum compression state when an impact amount (or acceleration) matching the shell firing environment is applied to the inertial ignition device 10 for a thermocell. FIG. 6(b) shows a state in which the inertial ignition device 10 for a thermocell operates normally when an impact amount (or acceleration) that matches the shell firing environment is applied. When the magnitude of the acceleration applied to the inertial ignition device 10 for a thermocell is a _af or more and the duration is t _af or more, the shearing of the front end 130 occurs through the state of FIG. 6(a), and the striking part ( 140) is released, and as shown in FIG. 6(b), the striking unit 140 moves to operate the gunpowder unit 110. As shown in FIG. The shear of the front end 130 may occur in a shorter time than the duration of the acceleration accompanying the firing of the shell. Preferably, before the magnitude of the acceleration becomes the maximum, the shearing of the front end 130 occurs and the striking unit 140 in which the restraint is released must have a sufficient speed when striking the explosives 110 .

The size condition of the always non-operating acceleration condition and the always operating acceleration condition for a kind of striking part 140 given in the inertial ignition device 10 for a thermocell is satisfied by adjusting the physical properties and shape of the front end part 130 and the duration condition can be satisfied by adjusting the deformation resistance of the elastic support part 120 . More specifically, the size condition of the always non-actuating and operating acceleration conditions can be adjusted according to the strength of the material used for the front end 130, and the shape of the front end 130 as shown in FIG. In the case of having two or more shear holes 132, in the case of having two or more shear holes 132 and a notch 133 to be described later, in the case of having the notch 133 in the form of a concentric circle at the center of the front end, the shear The thickness of the part 130 may be adjusted according to the shear area between the shear holes 132 . In addition, the duration condition can be adjusted by structural rigidity, elastic modulus, and the like of the elastic support unit 120 .

Next, FIG. 7 shows an inertial ignition device for a thermal cell according to another embodiment of the present invention, and relates to an embodiment in which the external part 100 is different from the previous embodiment.

The external portion 100 of the embodiment shown in Fig. 7 (a) may be composed of a body 103 including a lower end and a side portion and a cover 102 covering the upper surface of the body 103.

7 (a) restricts the movement of the striking unit 140 in the direction toward the gunpowder unit 110 so that the striking unit can always strike vertically on the explosive unit 110 upper part. . By mounting the inertial ignition device 10 for the thermocell in the longitudinal direction in the shell 1, the direction of motion of the elastic support part 120, the front end part 130 and the striking part 140 is changed when the shell is fired. The amount of impact (or acceleration) is limited to the line of action, and furthermore, the striking unit 140 released from restraint can strike the gunpowder unit 110 in the vertical direction.

At this time, as shown in Fig. 7 (a), the outer diameter of the outer portion 100 is a ring-shaped protrusion 104 at the lower end of the cover 102 protrudes downward, and the outer diameter of the protrusion 104 is that of the front end 130. It is preferable to correspond to the outer diameter.

Thus, the non-projecting portion of the center of the cover 102 is in close contact with the upper end of the striking unit 140 , and the protruding portion 104 is in close contact with the upper end of the front end 130 . Through this, the cover 102 is completely in close contact with the front end 130 and the striking unit 140 . FIG. 7( b ) shows the external portion 100 in which the protrusion 104 and the non-protrusion do not exist. In this case, the upper end of the outer portion 102 is not completely in close contact with the front end portion 130 . In this case, when the acceleration in the direction opposite to the direction in which the amount of impact (or acceleration) involved in firing the shell acts during storage, transportation, transportation and maintenance of the shell 1, the front end 130, the elastic support part Since the 120 and the striking part 140 can move respectively, an undesirable situation may occur in which the assembled state cannot be maintained. In order to prevent this, the lower end of the protrusion 104 is in close contact with the front end 130 by providing the protrusion 104 on the cover 102 as shown in FIG. to be in close contact with the upper end of the part 140 .

Additionally, a fixing part protruding to an inner diameter corresponding to the outer diameter of the powder part 110 on the inner lower surface of the inner space of the outer part 100, the same or lower than the height of the powder part 110, and the flame hole 101 ) and a shape positioned on a concentric circle may be additionally included so that the gunpowder unit 110 can be fixed. Through this, the distance at which the striking part 140 is accelerated to the explosive part 110 after being released from the front end part 130 is additionally secured, and the inertial ignition device 10 for the thermal cell of the explosive part 110 is ) to prevent the inside movement so that the price of the gunpowder unit 110 by the striking unit 140 can be made accurately.

Meanwhile, the elastic support unit 120 may be formed of a hollow structure made of a polymer material or a spring. In more detail, according to the operating principle of the inertial ignition device 10 for a thermocell, the elastic support part 120 must be installed after the striking part 140 is released from the front end 130 and then the gunpowder part ( 110), it should be a hollow structure with an empty interior so that interference does not occur. Since the elastic support part 120 has the purpose of absorbing shock, when it is made of a polymer material, it may include natural rubber, synthetic rubber, thermoplastic elastomer, elastic fiber, foam, and the like. In addition, the elastic support unit 120 may be composed of a multi-turn wave spring (multi-turn wave spring), a coil spring, or the like.

Next, FIG. 8 shows various embodiments of the front end of the inertial ignition device for a thermo cell of the present invention.

The front end 130 has a circular plate shape in which the striking part hole 231 of a circular cross section is formed in the center, and the striking part 140 penetrates the striking part hole 231 and may be coupled.

And, as shown, it extends from the striking part hole 231 to a point close to the periphery, and the shear hole 232 is formed symmetrically with respect to the striking part hole 231, so that the shear force of the front end can be adjusted. The shear hole may be plural, and may be arranged at equal intervals from each other.

The front end hole 232 is preferably in a fan-shaped planar shape as shown.

As shown in FIGS. 8(a) and 8(d), the shear hole 232 extends from the striking part hole 231 to a point close to the periphery, and may be formed symmetrically with respect to the striking part hole 231. have.

The shear hole 232 may have a fan-shaped planar shape as shown, and its size may be adjusted according to a target shear force, thereby controlling the cross-sectional area in which the shear of the front end occurs. In more detail, the front end portion generates a shear at the front end only when the backward acceleration accompanying the firing of the shell 1 acts, thereby releasing the restraint on the striking unit 140 . Therefore, by controlling the size and number of holes at equal intervals existing on concentric circles inside the front end to change the area in which the shear occurs, operating and non-operating conditions according to the magnitude of the acceleration are realized.

Additionally, the shear position existing between the shear holes 232 of the front end portion should be the same as or outside the outermost portion of the striking unit 140 . Preferably, the shear position and the outermost portion of the striking unit 140 should match. In addition, when the striking unit 140 moves to the gunpowder unit 110 after the front end is sheared, the front end portion of the front end must not collide or interfere with the elastic support unit 120 . Accordingly, the shear position existing between the front end holes 232 of the front end part exists in the hollow part of the hollow elastic support part 120 .

And, a notch (233, notch) may be formed as shown in FIGS. 8 (a) and (b) for adjusting the shear force.

Referring to FIG. 8 (e), which is a side cross-sectional shape for this, the notch 233 is formed with a front end upper surface, a striking hole and a concentric circular groove on the upper surface of the front end, and shearing of the front end occurs at the same time as shearing is easy. make it possible

FIG. 8(b) is an embodiment in which only the notch 233 is configured without the shear hole 232, and FIG. 8(a) is an embodiment in which both the shear hole 232 and the notch 233 are formed. On the other hand, FIG. 8(c) shows that neither the shear hole nor the notch is formed in the front end), and in this case, the interference is large, which is an undesirable shape. Additionally, in order to minimize the interference, the shape of the front end hole 232 in the front end) is more closely related to the elastic support unit 120 than the portion close to the striking unit 140, that is, a portion close to the circumference of the front end. It is more preferable to form in a large, ie, planar, sector shape.

The notch 231 and the shear hole 232 include an effect of inducing the shear of the front end to occur at the same time.

Next, FIG. 9 shows various embodiments of the striking part of the inertial ignition device for a thermo cell of the present invention.

9 (a) is configured such that the striking part and the insertion part are divided into an upper body 241 and a lower body 242, so that it can be easily assembled to the front end.

That is, after forming the striking holes 134 and 231 in the center of the front end, male and female screws are formed to correspond to the upper body 241 and the lower body 242 , and they are coupled.

And, as shown in Fig. 9 (b), the lower extension is omitted so that it can be configured as a stationary type.

That is, it is composed of an insertion part 341 , an upper extension part 342 , and a tip part.

In addition, the striking unit may be integrally formed with the front end 130 as shown in FIG. 9( c ).

That is, the lower extension 443 protrudes downward from the center of the lower end of the front end 130 , and the tip portion 444 protrudes from the lower end of the lower extension 443 , so that the lower extension 443 is the front end. and the tip portion 444 is in charge of hitting, thereby performing the roles of the front end and the striking portion, respectively.

In the case of such an integrated striking part, the moving distance to the gunpowder part 110 is relatively short compared to the fastening-type striking part of FIG. 9(a) and the stationary-type striking part of FIG. It has the advantage that the fastening process with the front end part 130 can be omitted.

As shown in the enlarged view, the tip portion 444 may have a cross-sectional area smaller than that of the lower extension 443 and protrude at an aspect ratio of 2:1 or more. This is in order to sufficiently deliver the energy required to operate the powder part 110 even if shaking occurs when the lower extension part 443 strikes the powder part 110 after the restraint of the front end part 130 is released. to be.

As described above, according to the present invention, there is provided an inertial ignition device for thermocells that activates thermocells applicable to small shells and warheads by using the amount of impact (or acceleration) accompanying shell launch without a separate external power supply device. In addition, although the embodiments have been described with reference to the limited embodiments and drawings, various modifications and variations are possible by those skilled in the art from the above description. For example, even if the described techniques are performed in an order different from the described method, the described components are combined or combined in a different form from the described method, or are substituted or substituted by other components or equivalents, an appropriate result may not be obtained. can be achieved.

The present invention as described above has been described with reference to the illustrated drawings, but it is not limited to the described embodiments, and it is common knowledge in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. self-evident to those who have Accordingly, such modifications or variations should be said to belong to the claims of the present invention, and the scope of the present invention should be interpreted based on the appended claims.

1: shell 10: ignition device
20: thermo cell 30: electronic component
100: external part
101: flame hole 102: cover
103: body 104: protrusion
105: gunpowder part mounting groove
110: gunpowder department
120: elastic support part
130: front end
131: inner ring 132: outer ring
133: support
134, 231: striking hole 135, 232: shear hole
233 : Notch
140: hitting unit
141, 341: insertion part
142, 241, 342: upper extension
143, 242, 443: lower extension
144, 444: tip part

Claims (23)

an outer portion coupled to an upper end of the thermal cell, having an internal space, and having a flame hole passing through the lower end to communicate with the thermal cell;
a gunpowder part formed on a lower surface of the inner space and mounted in a gunpowder part mounting groove communicating with the flame hole;
an elastic support portion formed along an inner wall surface of the inner space and elastically deformable in a height direction of the outer portion;
a front end supported on the upper end of the elastic support and having a striking hole in the center; and
Including a striking part inserted into the striking part hole and supported on the front end,
When the front end is sheared by an inertial force, characterized in that the striking portion strikes the powdered part,
Inertial ignition device for thermo cell. The method according to claim 1,
The front end,
an inner ring in which the striking part hole is formed;
an outer ring having a larger diameter than the inner ring; and
Containing a plurality of supports connecting between the inner ring and the outer ring,
Inertial ignition device for thermo cell. 3. The method according to claim 2,
The shear hole formed between the inner ring and the outer ring is characterized in that the sector shape,
Inertial ignition device for thermo cell. The method according to claim 1,
Characterized in that the upper surface of the front end is formed with a notch in the form of a concentric circle with the hole of the striking part,
Inertial ignition device for thermo cell. The method according to claim 1,
The front end is characterized in that when an inertial force greater than a reference inertial force is applied to the front end for a reference time or more, it is sheared,
Inertial ignition device for thermo cell. The method according to claim 1,
The front end is characterized in that it does not shear when an inertial force less than a reference inertial force is applied to the front end, or an inertial force is applied for a reference time or less,
Inertial ignition device for thermo cell. The method according to claim 1,
The hitting unit,
an insertion part inserted into the striking part hole;
an upper extension part having an outer diameter extending from the upper end of the insertion part and supported on the upper surface of the front end part;
a lower extension part having an outer diameter extending from a lower end of the insertion part and being supported on a lower surface of the front end part; and
Containing a tip protruding downward from the center of the lower end of the lower extension,
Inertial ignition device for thermo cell. The method according to claim 1,
The hitting unit,
an upper body partially inserted into the striking part hole, the outer diameter is formed to be larger than the inserted part, and supported on the upper surface of the front end part;
a lower body partially inserted into the striking part hole, the outer diameter of the inserted part is extended and supported on the lower surface of the front end part; and
Including a tip protruding downward from the center of the lower end of the lower body,
characterized in that the upper body and the lower body are screwed together,
Inertial ignition device for thermo cell. The method according to claim 1,
The hitting unit,
an insertion part inserted into the striking part hole;
an upper extension part having an outer diameter extending from the upper end of the insertion part and supported on the upper surface of the front end part; and
Containing a tip protruding downward from the center of the lower end of the lower extension,
Inertial ignition device for thermo cell. The method according to claim 1,
A step portion is formed at the upper end of the inner space, an upper space having a smaller diameter than the inner space is formed, and the step portion is in contact with the upper surface of the front end portion,
Inertial ignition device for thermo cell. The method according to claim 1,
A fixing part protruding to an inner diameter corresponding to the outer diameter of the gunpowder part is formed on the inner lower surface of the inner space,
Inertial ignition device for thermo cell. The method according to claim 1,
The outer part,
a body forming a lower end portion and a side portion of the outer portion; and
a cover covering the upper surface of the body;
Characterized in that a protrusion having an outer diameter corresponding to the outer diameter of the front end is formed on the lower end of the cover, which protrudes in the downward direction,
Inertial ignition device for thermo cell. an outer portion coupled to an upper end of the thermal cell, having an internal space, and having a flame hole passing through the lower end to communicate with the thermal cell;
a gunpowder part formed on a lower surface of the inner space and mounted in a gunpowder part mounting groove communicating with the flame hole;
an elastic support portion formed along an inner wall surface of the inner space and elastically deformable in a height direction of the outer portion;
a front end supported on the upper end of the elastic support and having a striking hole in the center; and
and a striking part inserted into the striking part hole and supported on the front end,
The front end,
an inner ring in which the striking part hole is formed;
an outer ring having a larger diameter than the inner ring; and
It includes a plurality of supports connecting between the inner ring and the outer ring,
Characterized in that the upper surface of the front end is formed with a notch in the form of a concentric circle with the hole of the striking part,
Inertial ignition device for thermo cell. 14. The method of claim 13,
The shear hole formed between the inner ring and the outer ring is characterized in that the sector shape,
Inertial ignition device for thermo cell. 14. The method of claim 13,
The front end is characterized in that when an inertial force greater than a reference inertial force is applied to the front end for a reference time or more, it is sheared,
Inertial ignition device for thermo cell. 16. The method of claim 15,
The front end is characterized in that it does not shear when an inertial force less than a reference inertial force is applied to the front end, or an inertial force is applied for a reference time or less,
Inertial ignition device for thermo cell. 14. The method of claim 13,
A fixing part protruding to an inner diameter corresponding to the outer diameter of the gunpowder part is formed on the inner lower surface of the inner space,
Inertial ignition device for thermo cell. an outer portion coupled to an upper end of the thermal cell, having an internal space, and having a flame hole passing through the lower end to communicate with the thermal cell;
a gunpowder part formed on a lower surface of the inner space and mounted in a gunpowder part mounting groove communicating with the flame hole;
an elastic support portion formed along an inner wall surface of the inner space and elastically deformable in a height direction of the outer portion;
a front end supported on the upper end of the elastic support and having a striking hole in the center; and
Including a striking portion protruding downwardly from the center of the lower surface of the front end portion,
When the front end is sheared by an inertial force, characterized in that the striking portion strikes the powdered part,
Inertial ignition device for thermo cell. 19. The method of claim 18,
The front end,
an inner ring in which the striking part hole is formed;
an outer ring having a larger diameter than the inner ring; and
Containing a plurality of supports connecting between the inner ring and the outer ring,
Inertial ignition device for thermo cell. 20. The method of claim 19,
The shear hole formed between the inner ring and the outer ring is characterized in that the sector shape,
Inertial ignition device for thermo cell. 20. The method of claim 19,
Characterized in that the upper surface of the front end is formed with a notch in the form of a concentric circle with the hole of the striking part,
Inertial ignition device for thermo cell. 22. The method of claim 21,
The front end is characterized in that when an inertial force greater than a reference inertial force is applied to the front end for a reference time or more, it is sheared,
Inertial ignition device for thermo cell. 23. The method of claim 22,
The front end is characterized in that it does not shear when an inertial force less than a reference inertial force is applied to the front end, or an inertial force is applied for a reference time or less,
Inertial ignition device for thermo cell.

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