JP2019011946A - Ignitor, ignition method and assembling method for ignitor - Google Patents

Abstract

To provide a mechanical ignitor for appropriately igniting an ignition powder.SOLUTION: An ignitor of the present invention comprises; a first member having an interior surface; a second member which has an outer surface for engaging an interior surface when the ignitor is assembled and also forms a space between the interior surface and the outer surface when the ignitor is assembled; and an ignition powder installed in the space. The second member is disposed in a movable manner with respect to the first member when assembled so that it provides, to the ignition powder, certain pressure including shear force or/and compressed force for igniting the ignition powder.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an igniter, an ignition method, and an assembling method of the igniter.

  Pyro-type actuator mechanisms, which are actuator mechanisms that obtain the output by moving the piston with the power of ignition powder, are used in devices such as vehicle airbag systems, pedestrian protection systems, current breakers, punches, and digestion systems. Yes. In the medical field, a syringe that injects a substance to be injected by a pressurized piston is known, and a pyro actuator mechanism has been widely studied as a driving source for such a syringe. An igniter that ignites the igniting agent is mounted as a drive source for obtaining an output in such an actuator mechanism.

  Here, the igniter has been widely developed conventionally, and roughly divided into an electric igniter and a mechanical igniter. An electric igniter electrically ignites an igniting agent by an ignition current supplied from the outside. Since the supply control of the ignition current is relatively easy, and the ignition current can be supplied to many igniters at a time, the ignition of each igniter can be arbitrarily set in a system having many igniters. It is especially useful when you want to control the On the other hand, a power source for supplying an ignition current, a control device for supply control, and the like are required, and the system must be large or complicated.

  On the other hand, a mechanical igniter obtains energy for igniting an igniting agent from a mechanical operation instead of an ignition current. For example, as shown in Patent Document 1, by pulling out the pin 12, a frictional force is generated between the friction member 7 and the first igniting agent 8, and the first igniting agent 8 is ignited by the energy, and the explosive 6 , 15 are sequentially burned. Moreover, like the syringe shown in Patent Document 2, the end portion 8 of the friction member 11 is rubbed against the igniting agent 2 by the pressing operation of the button 3 by the user, and the igniting agent 2 is ignited by the friction energy generated there. . Then, an injection solution is injected by the combustion energy generated by the ignition.

Swiss Patent Application No. 681175 US Pat. No. 6,537,245

  In a conventional mechanical igniter, ignition powder is ignited using frictional energy generated by a relatively linear operation such as a user pulling out or pressing a friction member. However, the frictional force acting between the friction member and the explosive in linear motion is likely to fluctuate depending on the state of contact between the two, so that the frictional energy due to such linear motion can be adjusted appropriately. Is not easy. If the frictional force between the friction member and the igniting agent is too weak, sufficient frictional energy is not generated and it is difficult to ignite the igniting agent. On the other hand, if the frictional force is too strong, the operability of the igniter may be reduced, or the igniter may be damaged by a user operation.

  In view of the above problems, an object of the present invention is to provide a mechanical igniter that realizes ignition of a suitable igniting agent.

  In order to solve the above-mentioned problems, the inventor of the present application pays attention to a configuration in which a pressure including shear force is applied to an igniting agent as energy for igniting the igniting agent, particularly in a mechanical igniter. It was possible to stably supply energy for the ignition powder. Specifically, the present invention is arranged in a state of being inserted into the first member, a first member having a predetermined inner surface, and a first inner member having a predetermined inner surface. And a second member having a predetermined outer surface facing the surface and forming a predetermined space in which the first igniting agent is disposed between the predetermined inner surface and the second member. In the igniter, in the arrangement state, the second member is centered on an insertion axis of the second member in the arrangement state in a state where the first ignition agent is sandwiched in the predetermined space. The predetermined space is disposed so as to be rotatable with respect to the first member, and the predetermined space has an opening communicating with the outside of the predetermined space in the axial direction of the insertion shaft. Then, when the second member rotates with respect to the first member, the first member in the predetermined space by a predetermined pressure including a shearing force generated between the predetermined outer surface and the predetermined inner surface by the rotation. One igniting agent is ignited, and the combustion product of the first igniting agent is discharged from the opening of the predetermined space.

  As the first igniter used in the igniter according to the present invention, any igniter that can be ignited when a predetermined pressure including a shearing force is applied can be adopted as described above. Examples of the igniting agent include ZPP (a mixture of zirconium and potassium perchlorate) and black explosive (boron nitrate, etc.). The ignition powder is disposed in a predetermined space defined by a predetermined inner surface of the first member and a predetermined outer surface of the second member. The predetermined space is a space defined by both surfaces in an arrangement state formed by inserting the second member into the first member, and has an opening communicating with the outside of the predetermined space in addition to these surfaces. doing.

  In the arrangement state, the second member is rotatable with respect to the first member. And when a 2nd member rotates with respect to a 1st member, both members rotate relatively in the state which pinched | interposed the 1st ignition powder in the predetermined space. As a result, during the rotational operation, the predetermined inner surface and the predetermined outer surface move relative to each other so as to apply a shearing force to the first igniting agent. As a result, a predetermined pressure including a relatively large shearing force can be stably applied to the first igniting agent, and the first igniting agent can be reliably ignited. Note that the combustion products generated by the ignition and combustion of the first igniting agent do not stay in the predetermined space but are released to the outside through the opening of the predetermined space, and are released to the outside. The energy (thermal energy or kinetic energy) of the generated combustion product becomes the primary output of the igniter.

  Thus, in the igniter according to the present invention, the predetermined inner surface and the predetermined outer surface are applied to the igniting agent disposed in the predetermined space by the mechanical operation of the rotational movement of the second member with respect to the first member. A configuration in which a predetermined pressure including a shearing force is applied is employed. The shearing force due to rotation can supply energy for ignition to the first igniting agent more stably than the ignition method using the frictional force due to linear motion as in the prior art. Therefore, manufacturing management including management of dimensional tolerances of parts of the igniter is facilitated, and reliable ignition as an igniter can be realized.

  Here, in the igniter, when the second member rotates with respect to the first member and the first igniting agent is ignited, the second member moves from the first member to the insertion axis direction. There may be further provided a restricting portion for restricting the separation. There is a possibility that the first member and the second member are subjected to pressure in a direction in which the first member and the second member are separated from the combustion product generated when the first igniting agent is ignited in the predetermined space. Therefore, by providing the restricting portion, the separation between the two is restricted, and damage to the igniter after ignition can be suppressed. The restricting portion restricts the first member and the second member from separating in the axial direction of the insertion shaft, and does not hinder the rotation of the second member relative to the first member.

  Here, as an example of the restricting portion, the restricting portion may be the predetermined inner surface and the predetermined outer surface formed so as to be uneven in a cross section along the axial direction of the insertion shaft. In this case, when the first igniting agent is ignited, the predetermined inner surface and the predetermined outer surface are in contact with each other, so that the second member is restricted from being separated from the first member. The That is, when the first igniting agent is ignited, the predetermined inner surface and the predetermined outer surface that are arranged in the unevenness mesh with each other, so that both surfaces act as a regulating portion.

  As another example of the restricting portion, the predetermined inner surface is a screw thread portion of the first member that is a female screw member, and the predetermined outer surface is a screw portion of the second member that is a male screw member. In the case of a thread portion, the restricting portion may be formed by screwing the first member and the second member. That is, when the first member as the female screw member and the second member as the male screw member are screwed together, the screw threads of both are engaged with each other, so that the separation of both members in the insertion axis direction can be restricted. While being possible, the rotation of the second member relative to the first member is sufficiently secured. In this embodiment, the space between the thread portions of the first member and the second member is a predetermined space, and when the second member is rotated with respect to the first member, A predetermined pressure including a shearing force acting on the first igniter is applied to the first igniter, thereby causing the ignition.

  Here, in the igniter described above, the combustion generation disposed in a predetermined portion that is in the vicinity of the opening of the predetermined space and is in contact with the combustion product of the ignition agent discharged from the opening. A second igniter that can be ignited by an object may be further provided. Since the first igniting agent is arranged in the predetermined space as described above, it may be difficult to increase the amount of the igniting agent arranged. Further, since ignition is performed in a predetermined space by a predetermined pressure including a shearing force, it may be difficult to relatively increase the amount of the first igniting agent from the viewpoint of suitably performing the ignition. Therefore, it may not be easy to increase the output as the igniter with only the first igniter.

  Therefore, it is possible to increase the output as the igniter by disposing the second igniting agent at a position different from the first igniting agent, that is, at a predetermined portion where the first igniting agent is released. As the second igniting agent, any igniting agent can be adopted as long as it can be ignited by the combustion product of the first igniting agent. For example, the same igniting agent as the first igniting agent or a different igniting agent may be used. Preferably, the combustion energy generated by the second igniter is set larger than the combustion energy generated by the first igniter. Thus, it becomes possible to raise suitably the output as an igniter by making the combustion energy of a 2nd ignition powder higher.

  Here, in the igniter described above, the communication formed between at least one of the first member and the second member and communicating with the predetermined space and the predetermined portion where the second igniter is disposed. A passage may be further provided. In this way, by communicating the predetermined space and the predetermined portion through the communication path, the combustion product of the first igniting agent can be smoothly delivered to the second igniting agent arranged at the predetermined portion, It is possible to achieve suitable combustion of the second igniter.

  It is possible to provide a mechanical igniter that realizes ignition of a suitable igniting agent.

It is a figure which shows schematic structure of the igniter which concerns on this invention. It is a figure for demonstrating the ignition structure of the ignition agent in the igniter shown in FIG. It is a figure which shows schematic structure of the igniter assembly formed by attaching an igniter collar to the igniter shown in FIG. It is a figure which shows schematic structure of the syringe with which the igniter assembly shown in FIG. 3 was attached. It is a figure which shows the modification of the igniter which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the structure of the following embodiment is an illustration and this invention is not limited to the structure of this embodiment.

<Configuration of igniter 10>
FIG. 1 shows a schematic configuration of an igniter 10 according to the present invention. FIG. 2 shows a part of the igniter 10 shown in FIG. FIG. 2 is a cross-sectional view along the insertion axis direction in the igniter 10, and the lower stage (b) is a cross-sectional view in a direction perpendicular to the insertion axis direction. It is. Note that the insertion shaft refers to the state in the state where the second member 2 is inserted and arranged in the igniter 10 with respect to the first member 1 (hereinafter simply referred to as “arranged state”) in the igniter 10. An axis along the insertion direction.

  The igniter 10 shown in FIG. 1 is a mechanical igniter, and is placed in an arrangement state before the first igniter 8 (see FIG. 2) loaded therein is ignited. Therefore, mechanical force from the outside acts on the igniter 10 placed in this arrangement state, so that the first igniter 8 loaded is ignited. Here, the main body of the igniter 10 is formed by the first member 1 and the second member 2. The first member 1 is threaded so that the inner surface of the first member 1 acts as a female screw at the insertion site 1a where the second member 2 is inserted. The inner surface of the first member 1 due to the thread of the female screw is referred to as a thread surface 1c in the upper stage (a) of FIG. 2, and the thread surface 1c corresponds to a predetermined inner surface according to the present invention. To do. On the other hand, the second member 2 inserted in the first member 1 is threaded so that the outer surface thereof acts as a male screw. The outer surface of the second member 2 due to the thread of the male screw is referred to as a thread surface 2b in the upper stage (a) of FIG. 2, and the thread surface 2b corresponds to a predetermined outer surface according to the present invention. To do.

  In this way, the first member 1 and the second member 2 having the thread surfaces 1c and 2b are formed with respective thread surfaces so that they can be screwed together via the thread surfaces. . In order to reach the arrangement state shown in FIG. 1, the second member 2 is advanced from the left side to the right side in FIG. 1 while slowly rotating and screwing the second member 2 to the first member 1. Let me insert it. The axis along the insertion direction of the second member 2 is the insertion axis. Note that the second igniter 4 is disposed in a portion (hereinafter referred to as “tip portion”) 1b on the distal end side (right side in FIG. 1) 1b of the first member 1 in a state before the second member 2 is inserted. ing. Accordingly, the insertion of the second member 2 into the first member 1 is performed up to a position where the tip of the second member 2 comes into contact with the second igniting agent 4.

  Further, the second member 2 formed as a male screw member at the base end side (left side in FIG. 1) of the second member 2 can be rotated inside the first member 1. Even when the second member 2 is inserted into the first member 1, a handle portion 6 having a length sufficient to protrude from the first member 1 is attached. Therefore, the second member 2 is inserted into the first member 1 by turning the handle portion 6. In addition, the recessed part 6a is provided in the center part of the handle | steering-wheel part 6, The components and tool for rotating the handle | steering-wheel part 6 are engage | inserted, and the rotation operation of the handle | steering-wheel part 6 can be made easier. .

Moreover, in the arrangement | positioning state shown in FIG. 1, after the 2nd member 2 is inserted in the 1st member 1, the cup 3 covers the 2nd ignition charge 4 so that the front end side of the 1st member 1 may be covered. Thus, it is attached to the first member 1. The cup 3 has a top surface 3 b disposed so as to face the second igniting agent 4 and a side surface 3 a formed in an annular shape so as to cover the side surface of the first member 1. The top surface 3b is a portion that is cleaved by a combustion product generated when the igniter 10 is operated, and a weakened portion that is weaker than the surroundings can be formed to facilitate the cleaving. And the side 3a of the cup 3 and the 1st member 1 are fixed by welding, and the reference number 5 refers to the welding location in FIG. In addition, in order to suppress moisture from entering the igniter 10 by this welding, the welded portion 5 is formed in an annular shape between the side surface 3 a of the cup 3 and the first member 1. As another method for fixing the cup 3, a protrusion is provided on the inner side of the side surface 3 a of the cup 3, and the protrusion is inserted into a recess provided on the side surface of the first member 1, whereby the first member 1. The cup 3 may be fixed to the base. In this case, it is preferable to apply a sealing agent between the side surface 3a and the first member 1 for the purpose of preventing moisture from entering. Further, when the cup is fitted by the protrusion and the recess as described above, it is preferable to determine the shape and size of the protrusion and the recess so that the cup 3 does not fall off due to the pressure generated by the combustion of each ignition agent.

Here, loading of the first ignition powder 8 in the igniter 10 will be described. As shown in FIG. 2A, a minute space 7 is formed between the first member 1 and the second member 2 that are screwed together. That is, in the arrangement state, the thread surface 1c that is the inner surface of the first member 1 facing each other and the thread surface 2b that is the outer surface of the second member 2 are in a state where the surfaces are in complete contact with each other. Microscopically, as shown in FIG. 2A, a space 7 is formed so that the particles of the first igniter 8 can be loaded. Therefore, the screwing relationship between the first member 1 and the second member 2 is not for generating a fastening force by the screwing, but a space is formed so that the first igniter 8 can be loaded, And it is for enabling the 2nd member 2 to be inserted in the 1st member 1 by screwing. In addition, when loading the 1st igniting agent 8 in the said space, you may load after making the slurry state (wet filling) avoiding the dry state of the 1st igniting agent 8. For example, as described in Japanese Patent Application Laid-Open No. 2004-115001, an ignition agent can be dissolved in a solvent, adjusted to a slurry, poured into the space, and filled with a method of drying the solvent.

  Here, the space 7 formed between the thread surface 1c and the thread surface 2b is a space in which the first igniter 8 is loaded as described above, and is formed so as to surround the second member 2. ing. Here, the spaces 7 are opened to the distal end portion 1b side and the proximal end portion side of the first member 1, respectively. And the opening part by the side of the front-end | tip part 1b of the space 7 is the state obstruct | occluded by the 2nd ignition powder 4 arrange | positioned at the front-end | tip part 1b, as shown to Fig.2 (a).

  Further, as shown in FIG. 2B, the second member 2 is formed with a groove portion 9 extending along the insertion axis direction. The groove 9 has a predetermined depth, opens into a space 7 formed between the thread surface 1c and the thread surface 2b, and is located on the side of the distal end portion 1b where the second igniting agent 4 is disposed. It is also connected to the space. That is, the groove 9 is formed so as to communicate the space 7 and the space on the distal end portion 1b side.

An ignition operation in the igniter 10 configured as described above will be described. In the present embodiment, the first igniting agent 8 and the second igniting agent 4 use the same component igniting agent. Examples of the ignition powder include explosives containing zirconium and potassium perchlorate (ZPP), explosives containing titanium hydride and potassium perchlorate (THPP), explosives containing titanium and potassium perchlorate (TiPP), aluminum Explosive (APP) containing aluminum and potassium perchlorate, explosive containing aluminum and bismuth oxide (ABO), explosive containing aluminum and molybdenum oxide (AMO), explosive containing aluminum and copper oxide (ACO), aluminum and iron oxide An explosive comprising an explosive containing (AFO) or a combination of a plurality of these explosives. These explosives generate high-temperature and high-pressure plasma at the time of combustion immediately after ignition. However, when the combustion product is condensed at a normal temperature and does not contain a gas component, the generated pressure rapidly decreases. Moreover, you may use explosives other than these as an ignition powder.

  Here, in the arrangement state shown in FIG. 1, when the handle portion 6 is rotated with a certain degree of strength, the second member is placed in the first member 1 with the first igniting agent 8 loaded in the space 7. 2 is further screwed. At this time, the thread surface 1c on the first member 1 side and the thread surface 2b on the second member 2 side have a predetermined pressure including a shearing force and a compressive force with respect to the first igniting agent 8 loaded in the space 7. Move relative to give. In particular, by rotating the second member 2, a relatively large shearing force can be generated, and energy sufficient for ignition of the first igniting agent 8 loaded in the space 7 can be supplied.

  As described above, when the predetermined pressure is applied to the first igniting agent 8 by the rotation of the second member 2, the first igniting agent 8 is ignited, and combustion products are generated by the combustion. Here, since the space 7 in which the first igniting agent 8 is disposed is open to the space on the tip portion 1b side in which the second igniting agent 4 is disposed, the combustion product passes through the opening. Thus, it flows into the second igniter 4 side. Further, as described above, since the groove portion 9 is formed in the second member 2, the combustion product generated in the space 7 flows into the second igniter 4 side also through the groove portion 9. Thus, the combustion product generated by the ignition and combustion of the first igniting agent 8 is supplied to the second igniting agent 4, so that the second igniting agent 4 is then ignited and burned. Since the second igniting agent 4 can secure a relatively large space compared to the first igniting agent 8, the loading amount of the second igniting agent 4 determines the output as the igniter 10. The amount is assumed to be about. Therefore, the loading amount of the first igniting agent 8 is set to an amount capable of generating a combustion product for igniting and burning the second igniting agent 4.

  Thus, in the igniter 10, a predetermined pressure including a shearing force is applied to the first igniting agent 8 loaded in the space 7 with the mechanical rotation operation of the second member 2 as a starting point. The first igniting agent 8 and the second igniting agent 4 are sequentially ignited and burned, and an output as the igniter 10 is obtained. And it becomes possible to ensure stable ignition and combustion of the igniting agent by utilizing the shearing force resulting from the rotational operation as described above. Note that, when the first igniting agent 8 and the second igniting agent 4 are combusted, a pressure corresponding to the combustion energy is applied to the second member 2. However, since the second member 2 is screwed to the first member 1, when the pressure is applied, the thread surface 1c and the thread surface 2b are engaged with each other, and the second member 2 is engaged. Is separated from the first member 1 (for example, moved to the left in FIG. 1).

<Usage example of the igniter 10>
Here, by mounting the igniter 10 in a predetermined device, the output can be used for various purposes. An igniter assembly 15 formed by attaching an igniter collar 11 to the igniter 10 in order to make it easier to use the output of the igniter 10 will be described with reference to FIG. The igniter collar 11 is a member for mounting and fixing the igniter 10 on one side (right side in FIG. 3) of the substrate 11b having a through hole 11a formed in the center. And the handle | steering-wheel part 6 is arrange | positioned in the state which the recessed part 6a was exposed through the through-hole 11a on the other side (left side in FIG. 3) of the board | substrate 11b. It should be noted that the igniter 10 is fixed to the igniter collar 11 with a resin 12, and the rotation operation of the handle portion 6 is ensured in the fixed state.

  When the igniter 10 is attached to the igniter collar 11 as described above, the igniter 10 can be easily mounted on a predetermined device side via the igniter collar 11. In the igniter assembly 15, the handle portion 6 and the configuration related to the igniting agent loaded in the igniter 10 are arranged with the substrate 11 b interposed therebetween. Therefore, the combustion product of the igniting agent, in particular, the combustion product of the first igniting agent 8 is difficult to reach the handle portion 6 side, and the operation of the igniter 10, that is, the operation of the handle portion 6 by the user for ignition. Combustion products are less likely to affect the rotation operation and the like. This point also improves the operability of the igniter 10 by the user.

  Here, the needleless syringe 20 on which the igniter assembly 15 shown in FIG. 3 is mounted will be described with reference to FIG. FIG. 4 is a cross-sectional view of the syringe 20. The right side in FIG. 4 is the distal end side of the syringe 20, that is, the side from which the injection solution is ejected, and the left side in FIG. 4 is the proximal end side of the syringe 20, that is, the side on which the user operates the syringe 20. The syringe 20 has a syringe body 22, and a central portion of the syringe body 22 is provided with a through hole 29 that extends in the axial direction and has a constant diameter along the axial direction. One end of the through hole 29 communicates with the combustion chamber 28 having a diameter larger than the diameter of the through hole 29, and the other end reaches the nozzle 24. Furthermore, the igniter assembly 15 is installed on the opposite side of the combustion chamber 28 from the communication location with the through hole 29 so that the top surface 3b of the cup 3 faces the communication location.

  Here, no additional igniting agent is arranged in the combustion chamber 28 shown in FIG. 4, but a gas generating agent or the like that burns with combustion products of the igniting agent to generate gas is arranged in the combustion chamber 28. You can also As an example of the gas generating agent, a single base smokeless gunpowder composed of 98% by mass of nitrocellulose, 0.8% by mass of diphenylamine and 1.2% by mass of potassium sulfate can be mentioned. It is also possible to use various gas generating agents that are used in gas generators for airbags and gas generators for seat belt pretensioners. It is possible to change the combustion completion time of the gas generating agent by adjusting the size, size and shape of the gas generating agent when placed in the combustion chamber 28, in particular, the surface shape. The pressure transition in the combustion chamber 28 can be a desired transition.

  Next, a metal piston 26 is arranged in the through hole 29 so as to be slidable in the through hole 29 along the axial direction, one end of which is exposed to the combustion chamber 28 side, and the other end is exposed to the other end. The plunger 27 is integrally attached. Here, as a material of the plunger 27, for example, butyl rubber or silicon rubber can be employed. Furthermore, styrene elastomers, hydrogenated styrene elastomers, and polyolefins such as polyethylene, polypropylene, polybutene, and α-olefin copolymers, oils such as para, process oil, and powders such as talc, cast, mica, etc. The thing which mixed the inorganic substance is mention | raise | lifted. Furthermore, various rubber materials such as polyvinyl chloride elastomer, olefin elastomer, polyester elastomer, polyamide elastomer, polyurethane elastomer, natural rubber, isoprene rubber, chloroprene rubber, nitrile-butadiene rubber, styrene-butadiene rubber (especially added) Sulfurized ones) and mixtures thereof can also be employed as the plunger material. The plunger 27 has a plurality of annular protrusions formed on the outer periphery of the columnar body. When the plunger 27 is inserted into the through-hole 29 together with the piston 26, the protrusion is elastically deformed because of resin, and the degree of adhesion between the plunger 27 and the inner wall surface of the through-hole 29 can be increased.

  The injection liquid ML to be injected by the syringe 20 is accommodated in a space formed in the through hole 29 on the syringe distal end side from the plunger 27. As shown in FIG. 4, the injection liquid ML is not enclosed in a completely closed space, and the distal end side of the syringe is open. However, since the inner diameter of the through-hole 29 in which the injection solution ML is accommodated is extremely small and the amount of the injection solution is small, the surface tension of the injection solution ML is thus obtained even if the accommodation space of the injection solution ML is a semi-closed space. Thus, the state in which the injection solution ML is accommodated in the through hole 29 is preferably maintained. As will be described later, the stored injection liquid ML is injected from the nozzle 24 by being pressurized by the output of the igniter assembly 15.

Furthermore, a holder 25 in which a nozzle 24 for injecting the injection liquid ML is formed is provided on the distal end side of the syringe 20. The holder 25 is fixed to the end surface of the syringe body 22 with a gasket 23 interposed therebetween via a holder cap 30. The holder cap 30 is formed in a hook shape so as to be hooked to the holder 25 and is fixed to the syringe body 22 with screws. Thereby, the holder 25 is prevented from dropping from the syringe main body 22 due to the pressure applied to the injection liquid ML when the injection liquid ML is ejected. In addition, the igniter assembly 15 is also firmly attached to the syringe body 22 by the cap 31 for preventing the drop off. One nozzle 24 may be formed at the center of the holder 25, or a plurality of nozzles 24 may be formed.

  Here, in the syringe 20, an operation button 21 is attached to the recess 6 a (see FIG. 3) exposed in the igniter assembly 15. The operation button 21 incorporates a known mechanical mechanism (for example, a cylindrical cam) that converts a linear motion into a rotational motion, and when a user applies a force to press the operation button 21 (FIG. 4, the operation button 21 is pressed while being rotated by the mechanical mechanism. As a result, the pressing operation of the operation button 21 causes the rotating operation of the handle portion 6 in the igniter assembly 15.

  In the syringe 20 configured as described above, the user presses the operation button 21 in a state where the tip of the nozzle 24 is in contact with an object to be injected with the injection liquid ML (for example, the skin surface of the user's arm or foot). Press. By this user operation, the handle portion 6 in the igniter assembly 15 rotates (however, the handle portion 6 is also loaded in the pressing direction), and the first igniter 8 is moved between the thread surfaces 1c and 2b. It is ignited and burned by a predetermined pressure including the generated shear force. Thereafter, the second igniter 4 is subsequently ignited and burned. As a result, the combustion product is filled in the combustion chamber 28 and pressure is applied to the injection liquid ML accommodated in the through hole 29 via the piston 26. The pressurized injection solution ML is ejected toward the injection target through the nozzle 24. Since pressure is applied to the injected injection liquid ML, it can penetrate the surface of the object and the injection liquid reaches the inside thereof, thereby achieving the purpose of injection in the syringe 20.

<Modification of Igniter 10>
Here, the modification of the igniter 10 is demonstrated based on FIG. The upper stage (a) of FIG. 5 shows the arrangement state of the first member 1 and the second member 2 in the first modification. The arrangement shown in FIG. 5A is when both members are viewed from the direction of the axis of insertion into the first member 1. Here, in the first modification, the first member 1 has an inner surface whose cross section is formed in a regular octagon, and the second member 2 is inserted into a space formed by the inner surface. Has been. And the 2nd member 2 has the outer surface in which the cross section was formed in the regular octagon similarly. And the space 7 which can accommodate the 1st ignition powder 8 is formed between the inner surface of the 1st member 1 and the outer surface of the 2nd member 2 which oppose (in Fig.5 (a), the 1st The description of 1 ignition powder 8 is omitted).

  In the igniter 10 configured as described above, the second member 2 is in contact with the inner surface of the first member 1 as shown in FIG. However, in a state in which the outer surface of the second member 2 is in contact with the inner surface of the first member 1 by rotation, the first igniting agent 8 is sandwiched between the two members, and a predetermined force including a shearing force and a compressing force is sandwiched therebetween. The pressure will be applied intensively. Therefore, the first igniting agent 8 can be efficiently ignited, and therefore, the output of the igniter 10 can be easily used for various purposes as in the above embodiment.

  Next, the 2nd modification of the igniter 10 is demonstrated based on the lower stage (b) of FIG. The lower part (b) of FIG. 5 shows the arrangement state of the first member 1 and the second member 2 in the second modification. In addition, the arrangement | positioning state shown in FIG.5 (b) represents the state in the cross section along the insertion-axis direction to the 1st member 1 similarly to FIG. Here, in the second modified example, the outer surface of the second member 2 is formed in a truncated cone shape, and the inner surface of the first member 1 is also accommodated so that the second member 2 can be accommodated accordingly. It is formed in a shape. And the space 7 which can accommodate the 1st ignition powder 8 is formed between the inner surface of the 1st member 1 and the outer surface of the 2nd member 2 which oppose (in FIG.5 (b), The description of the first igniter 8 is omitted).

  Even in the igniter 10 configured as described above, the first igniter 8 in the space 7 is ignited by rotating the second member 2 via the handle portion 6. Here, as shown in FIG. 5 (b), the diameter of the handle portion 6 and the diameter of the truncated cone surface of the second member 2 are different at the connecting portion between the second member 2 and the handle portion 6. There is a step. Furthermore, the uneven | corrugated | grooved part 1d corresponding to the said level | step-difference part is formed in the 1st member 1 side. As described above, the engagement of the stepped portion on the second member 2 side in the insertion axis direction and the uneven portion 1d on the first member 1 side restricts the second member 2 from being separated from the first member 1. Yes. Thereby, even if a pressure is applied to the second member 2 due to the combustion of the first igniting agent 8 or the second igniting agent 4, it is avoided that the second member 2 is separated from the first member 1.

DESCRIPTION OF SYMBOLS 1 ...... 1st member 1c ...... thread surface 2 ...... 2nd member 2b ...... thread surface 3 .... cup 4 .... 2nd ignition powder 6 .... ··· Handle portion 7 ··· Space 8 ··· First igniter 9 ··· Groove portion 10 ··· Ignitioner 11 ··· Igniter collar 15 ··· Ignitioner assembly 20・ ・ ・ ・ Syringe 21 ・ ・ ・ ・ Operation button 24 ・ ・ ・ ・ Nozzle

Claims (9)

A first member having an inner surface;
A second member having an outer surface engaged with the inner surface in the assembled configuration in which the igniter is assembled, and forming a space between the inner surface and the outer surface in the assembled configuration;
An igniter disposed in the space;
With
The second member is a pressure for igniting the igniting agent, and applies a predetermined pressure including shearing force and / or compression force to the igniting agent with respect to the first member in the assembly configuration. Configured to be movable,
Igniter. An opening communicating the space and the outside of the space;
The igniter according to claim 1, further comprising: A first member having an inner surface; a second member having an outer surface engaged with the inner surface and forming a space between the inner surface and the outer surface; and an ignition agent disposed in the space And placing an igniter having:
Applying pressure to the igniting agent for igniting the igniting agent and including shearing force and / or compression force;
Having an ignition method. The step of applying the pressure includes rotating one of the first member and the second member with respect to the other of the first member and the second member.
The ignition method according to claim 3. Disposing a first member having an inner surface;
Disposing a second member having an outer surface;
Inserting the second member into the first member such that a space is formed between the first member and the second member;
Pouring slurry-like igniting agent into the space and drying the igniting agent after being poured into the space so as to ignite when a predetermined pressure is applied to the first member;
A method for assembling an igniter. The method of assembling an igniter according to claim 5,
The first member comprises a first thread defining the inner surface;
The second member comprises a second thread defining the outer surface;
Inserting the second member with respect to the first member includes engaging the second thread with the first thread;
How to assemble the igniter. A first member having an inner surface;
A second member having an outer surface engaged with the inner surface in the assembled configuration in which the igniter is assembled, and forming a space between the inner surface and the outer surface in the assembled configuration;
An igniter disposed in the space;
With
One of the first member and the second member is one of the first member and the second member in the assembly configuration for applying a predetermined pressure to the igniting agent to ignite the igniting agent. Configured to be movable relative to the other of the
Igniter. The predetermined pressure includes a shearing force or / and a compressive force,
The igniter according to claim 7. The outer surface of the second member is screwed with the inner surface of the first member;
The igniter according to claim 7.

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