WO2019049314A1

WO2019049314A1 - Actuator

Info

Publication number: WO2019049314A1
Application number: PCT/JP2017/032480
Authority: WO
Inventors: 弘充伊賀; 山本　裕三
Original assignee: 株式会社ダイセル
Priority date: 2017-09-08
Filing date: 2017-09-08
Publication date: 2019-03-14
Also published as: JP7034167B2; JPWO2019049314A1

Abstract

In an actuator comprising: an actuator body; an output piston part; an ignition device; and a sealing member, the output piston part has a designated end surface for receiving drive energy, and the sealing member seals a combustion product generated by the ignition device inside a first space on the ignition device side segmented by the sealing member, and also has a fixed end part, and a contact part that contacts the designated end surface. A fixing force of the fixed end part with respect to an inner wall is made bigger by a sliding force of the output piston part at a through hole. Also, in the state before explosive combustion with the ignition device, the contact part is positioned at the start position of the ignition device side with respect to the fixed end part, and by explosive combustion with the ignition device, the output piston part slides in contact with the designated end surface, and moves to an operating position of the output surface side with respect to the fixed end part. By doing this, it is possible to suitably transmit drive energy to the output piston part.

Description

Actuator

The present invention relates to an actuator that applies a predetermined force to an object via an output piston unit.

The electric circuit may be provided with a shut-off device that shuts off the conduction between the devices by operating at the time of abnormality of the devices constituting the electric circuit or at the time of abnormality of the system in which the electric circuit is mounted. As one aspect thereof, there has been proposed a continuity interrupting device which moves a cutting member at high speed by high pressure gas to forcibly and physically cut a conductor interposed between devices. For example, in the technique of Patent Document 1, the cutting member is driven by the high pressure gas generated by the gas generator to cut the conductor forming a part of the electric circuit, and the conductor generated by the cutting is used. Arc extinguishes arcs generated between cutting ends. Thereby, more reliable continuity can be achieved.

In addition, an actuator for pressurization using combustion energy of explosives has also been developed. For example, Patent Document 2 discloses a technique related to an actuator for driving a control member through a membrane using combustion energy of a pyrotechnic charge to block the flow of a medium in a flow path. In this technology, the elastically deformable membrane sandwiched between the control member and the housing is deformed by the combustion pressure of the explosive and the cylinder member attached to the membrane is displaced, whereby the control member is driven. It is a thing.

JP 2014-49300 A U.S. Pat. No. 6,397,595

In order to efficiently use the combustion energy of the explosive as a power source in an actuator that applies a predetermined force to an object, it is necessary to efficiently transmit the generated combustion energy to the output piston portion of the actuator. For that purpose, it is important to seal the combustion product generated by the combustion of the explosive in a certain closed space and to increase the pressure therein.

On the other hand, it is an elastically deformable film as in the prior art, and it distinguishes the space where combustion of explosives is performed and the space where the output part (control member) of the actuator to be pressurized is disposed. When the combustion energy is transferred to the control member through the deformation of the membrane, the membrane is elastically deformed at the time of combustion. On the other hand, in order to displace the control member by a necessary distance, the film needs to be elastically deformed largely toward the control member by combustion of the explosive, and in some cases, breakage or cleavage of the film may be a concern. If the membrane is damaged or the like, the combustion product can not be sealed in the space where the combustion is performed, and it becomes difficult to drive the control member.

Then, in view of the above-mentioned problem, the present invention aims at transmitting suitably the energy for a drive of the output piston part to the output piston part concerned in an actuator driven by explosives combustion.

In order to solve the above problems, according to the present invention, the sealing member for dividing the space in the actuator main body into the igniter side and the output piston portion side is the igniter side with the combustion product generated by the igniter. The structure sealed in the space of With such a configuration, the pressure in the space on the igniter side can be suitably raised. Moreover, while making the fixing force of the said sealing member larger than sliding force, the contact part with the output piston part in the said sealing member is burning with an igniter with respect to the fixed end of this sealing member. A configuration is adopted in which the start position on the igniter side is moved to the action position on the output side. With such a configuration, it is difficult to generate a tear in the sealing member while suitably securing the amount of movement of the output piston portion, whereby transmission of drive energy to the output piston portion becomes suitable.

Specifically, the present invention comprises an actuator body having a through hole formed in the axial direction, and an output piston portion slidably disposed in the through hole, the output piston portion being an actuator An actuator for causing a predetermined force to act on an object by causing it to project from an output surface of a main body, the ignition device burning an explosive, wherein the output piston portion slides by the explosive combustion in the ignition device An igniter for applying drive energy for the output piston portion, a space in the actuator body is divided into a first space in which the igniter is disposed, and a second space in which the output piston portion is disposed. And a sealing member for sealing the combustion product generated by the igniter in the first space. Further, the output piston portion has a working end portion acting on the object, and a predetermined end portion having a predetermined end surface receiving the driving energy, and the sealing member is provided in the actuator body. A fixed end fixed to the inner wall which defines a space, and a contact portion which contacts the predetermined end face of the predetermined end at the time of the pyrotechnic combustion in the igniter, and fixing the fixed end to the inner wall The force is configured to be greater than the sliding force of the output piston portion at the through hole. Furthermore, in the state before the pyrotechnic combustion in the igniter, the contact portion is located at the start position on the igniter side with respect to the fixed end portion, and the pyroelectric contact in the igniter is caused by the pyrotechnic combustion in the igniter. The sliding member is in contact with the predetermined end face, and is moved to the acting position on the output surface side with respect to the fixed end together with the sliding of the output piston portion.

In the actuator according to the present invention, by dividing the inside of the actuator body into the first space and the second space by the sealing member, the pressure in the first space can be effectively increased at the time of the pyrotechnic combustion in the ignition device. . The contact energy of the sealing member is moved from the start position to the operation position by the driving energy generated by the explosive combustion in the igniter, and contacts the predetermined end face of the output piston in the process of the movement. The part slides in the through hole. In addition, a predetermined force acts on the object by the action end portion protruding from the output surface by the sliding of the output piston portion. The predetermined force is appropriately set according to the purpose of acting on the object. For example, in order to destroy an object, the force necessary for the destruction is taken as a predetermined force. In addition, if the movement of the contact portion in the sealing member is caused by the combustion of the pyrotechnic charge, the drive energy is made to act directly on the output piston portion through the contact portion, or the drive energy is temporarily stored in another gas, After propagating to a liquid, a solid, etc., it can employ | adopt suitably the structure etc. which make an output piston part act indirectly via this contact part.

Here, in the actuator according to the present invention, the igniter for burning the explosive is one in which the igniter contained in the igniter is ignited by the execution of the igniter to generate a combustion product of the igniter. Or the ignition of the igniter may further burn a known gas generant (for example, single base smokeless powder) to produce a combustion product of the igniter and the gas generant. Well, the actuator of the present invention does not limit the specific configuration of the igniter.

In such an igniter, when the pyrotechnic burns, the combustion product diffuses to the first space in the actuator body, and the internal pressure rises to transmit drive energy to the output piston portion, and the energy As described above, it is a power source for driving the output piston portion. Here, since the actuator according to the present invention is provided with the sealing portion, the combustion product is sealed in the first space and does not enter the second space. Therefore, the drive energy by the combustion product is not diffused unnecessarily, and transmission to the output piston portion is expected. And, in order to further enhance the sealing effect, it is necessary for the sealing member to have a certain degree of resistance to the combustion of the explosive, and on the other hand, by providing the sealing member, to the output piston portion of the drive energy. It is not preferable that the transmission of Therefore, the sealing member needs to be compatible with the preferable sealing of the combustion product and the suitable transmission of the drive energy to the output piston portion.

Therefore, in the sealing member, the fixing force of the fixed end is set larger than the sliding force of the output piston portion in the through hole. Thus, the sealing member which affects the sealing effect in the first space can be suitably fixed to the inner wall of the actuator body, so that the output piston portion is slid by the through hole when assembling the actuator. The state of contact with the sealing member, that is, the state in which the predetermined end face of the output piston portion is in contact with the contact portion of the sealing member can be stably formed. Such stable contact between the output piston portion and the sealing member is an important factor for the favorable transfer of drive energy to the output piston portion.

Further, the sealing member has a fixed end fixed to the inner wall of the space in the actuator main body from the starting position on the igniter side to the acting position on the output surface side of the sealing member. It is configured to move in contact with the end face. With such a configuration, after the pyrotechnic combustion, the sealing member is deformed so that the contact portion is turned to the fixed end, and the sliding of the output piston portion is promoted. Therefore, as in the prior art, the sealing member is not greatly stretched in only one direction at the time of the pyrotechnic combustion, and the sealing member is less likely to be damaged. Furthermore, when the above-described reverse deformation structure is adopted, the movement range of the contact portion with respect to the fixed end portion from the starting position on the igniter side to the action position on the output surface side with respect to the fixed end The sealing member does not need to be greatly deformed while securing the moving amount of the contact portion corresponding to the sliding distance of the output piston portion for the action of the predetermined force on the sealing member, whereby the sealing member is broken. It becomes difficult. This contributes to both the favorable sealing of the combustion products and the favorable transmission of the drive energy to the output piston part.

Further, in the above-described actuator, the output piston portion may be configured to be able to be pushed into the through hole from the side of the working end before the explosive is burned in the igniter. With such a configuration, the contact state between the output piston portion and the sealing member can be suitably formed prior to the pyrotechnic combustion by the igniter. The pressing of the output piston may be performed not only from the working end but also by other means capable of displacing the output piston.

Furthermore, even if the output piston portion is released from the pushed-in state in a state where the output piston portion is pushed into the through hole and the predetermined end face is in contact with the contact portion, the working end portion of the output piston portion It may be held at a position flush with the output surface or at a position in the through hole more than the output surface. Thereby, after the contact between the output piston portion and the sealing member is formed, the output surface of the actuator main body can be brought into contact with the object, and the actuator can be put on standby (standby for operation). It can be made to act properly.

In the actuator according to the present invention, the sealing member may be formed of an elastic member. As a result, the sealing member is extended at the time of the pyrotechnic combustion in the igniter, thereby achieving both the sealing of the combustion product and the transmission of the driving energy to the output piston portion more suitably.

Furthermore, the sealing member covers a side surface portion of the predetermined end portion along the sliding direction of the output piston portion in a state before the pyrotechnic combustion in the igniter, and the sealing end portion and the contact portion The intermediate portion may further have an intermediate portion formed therebetween, in which case the intermediate portion extends in the sliding direction as the output piston portion slides due to the explosive combustion in the igniter. The contact portion is configured to move from the start position to the action position. In the actuator thus configured, the contact portion moves while the middle portion of the sealing member extends in the sliding direction of the output piston portion, and the output piston portion is propelled, so that the output piston portion A sliding amount corresponding to the extension is provided. By such an operation, the drive energy by the pyrotechnic combustion is suitably used to propel the output piston portion, and the sliding amount of the output piston portion can be suitably secured. Further, since the intermediate portion extending in the sliding direction of the output piston portion is formed by the elastic member, the intermediate portion can be flexibly expanded, and as a result, the sealing member is less likely to be damaged.

In the actuator, an outer diameter of the output piston portion at the predetermined end may be smaller than an inner diameter of the through hole. In that case, the intermediate portion extends in the sliding direction along the inner wall surface of the through hole in accordance with the sliding of the output piston portion due to the explosive combustion in the igniter. According to such a configuration, in the vicinity of the predetermined end, the output piston portion has a gap in the radial direction with respect to the through hole. Then, when the contact portion moves due to the combustion of the explosive, the middle portion can be expanded by using the gap, and thus the middle portion can be easily expanded. As a result, the sliding amount of the output piston portion can be suitably secured, and breakage of the sealing member can be avoided.

In the above-described actuator, the auxiliary piston portion is further slidably disposed in the through hole and is disposed on the first space side, and the contact portion of the sealing member is a portion of the output piston portion. You may further provide the auxiliary | assistant piston part arrange | positioned on both sides with the said predetermined end surface. In that case, the auxiliary piston part is an igniter side end facing the igniter and the drive energy is inputted, and an output for transmitting the drive energy to the predetermined end face of the output piston part through the contact part. And a piston side end.

In the actuator configured as described above, the igniter side end of the auxiliary piston receives drive energy from the igniter, and the other end, the output piston side, has an output piston and an auxiliary piston. The drive energy is transmitted to a predetermined end face of the output piston portion through the contact portion of the sealing member sandwiched between the portions. Therefore, the sealing member does not directly receive the drive energy from the igniter but receives it via the auxiliary piston member. As a result, at the time of the pyrotechnic combustion, the contact portion is not directly exposed to the high temperature and high pressure combustion products, and thus the breakage of the sealing member including the contact portion can be more reliably avoided. In addition, since the contact portion is sandwiched between the output piston portion and the auxiliary piston portion, a force for reversing the sealing member as described above can be appropriately applied to the sealing member, thereby providing a smooth output. The sliding of the piston can be expected.

Further, predetermined devices and devices configured using the actuator of the present invention also belong to the scope of the present invention. As an example of such a device etc., the electric circuit interruption device which cuts off the energization part of an electric circuit and cancels the energization state is mentioned. That is, in the electric circuit breaker according to the present invention, the output piston unit exerts a shearing force as the predetermined force on the actuator and the object forming a part of the electric circuit. A fixed housing for fixing the actuator, and a control unit for operating the igniter when receiving an external trigger signal. In addition, as another method of the above-described device and the like, a syringe for injecting a substance to be injected into a region to be injected can be exemplified. That is, the syringe of the present invention comprises the actuator up to the above, a storage chamber capable of storing the injection target substance, a plunger which is the target object and pressurizes the injection liquid target substance in the storage chamber, and the plunger A syringe unit including a flow path through which the injection target substance flows in the pressurized storage chamber, and a nozzle unit that ejects the injection target substance from an injection port formed at an end of the flow path, And a syringe unit attached to the actuator such that the working end of the output piston unit is disposed in contact with the plunger. In addition, the predetermined device or the like configured by using the actuator of the present invention may be a device or the like other than the above-described electric circuit breaker or syringe.

According to the present invention, in an actuator driven by explosive combustion, energy for driving the output piston can be suitably transmitted to the output piston.

It is a figure showing a schematic structure of an actuator concerning a 1st embodiment of the present invention. It is a figure which shows the detail of the piston of the actuator shown in FIG. It is a figure which shows schematic structure of the initiator (ignition apparatus) with which the actuator shown in FIG. 1 is mounted | worn. It is a figure which shows the flow of an assembly of the actuator shown in FIG. It is a figure which compares and shows the state before the explosive combustion in an initiator, and the state after combustion in the actuator shown in FIG. It is a figure which shows schematic structure of the electric circuit interruption | blocking apparatus to which the actuator which concerns on 1st Embodiment of this invention is applied. It is a figure showing a schematic structure of a syringe which applied an actuator concerning a 1st embodiment of the present invention. FIG. 8 shows a portion of the assembly flow of the syringe shown in FIG. 7; It is a figure shown in the injector shown in Drawing 7, comparing the state before the explosive charge combustion in an initiator, and the state after combustion. It is a figure showing a schematic structure of an actuator concerning a 2nd embodiment of the present invention.

Hereinafter, an actuator according to an embodiment of the present invention will be described 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 these embodiment.

First Embodiment
FIG. 1 is a cross-sectional view of the actuator 1 cut in the axial direction. Here, the actuator 1 has an actuator body 2 composed of a first housing 3 and a second housing 4, and is connected to the distal end side of the actuator body 2 (the first housing 3 of the second housing 4). The end side opposite to the end side is the output side of the actuator 1, that is, the side on which an object that exerts a predetermined force is disposed. Further, the first housing 3 and the second housing 4 are fixed by screws and integrated. Here, a combustion chamber 31 which is an internal space extending in the axial direction is formed in the inside of the first housing 3, and in the inside of the second housing 4 in the same manner in the axial direction. A through hole 37, which is an internal space extending, is formed. Although the combustion chamber 31 and the through hole 37 are divided by the sealing member 8 described later, they are an internal space continuously disposed inside the actuator body 2.

Further, the tip end side of the actuator body 2, that is, the face on the tip end side of the second housing 4 forms an output face 4b. The output surface 4 b is a surface facing an object to which a predetermined force is applied when the actuator 1 is used. Here, a metal output piston 6 is disposed in the through hole 37 in the second housing 4 of the actuator body 2, and the output piston 6 is slidably held in the through hole 37.

Here, the details of the output piston 6 are shown in FIG. 2 so that the positional relationship with the second housing 4 can be grasped. The output piston 6 is formed in a generally axial shape extending along the axial direction of the through hole 37, and an end (hereinafter referred to as a "first end") 6a on the combustion chamber 31 side and an output surface 4b side An end, that is, an end (hereinafter referred to as a "second end") 6b that applies a predetermined force to an object, and the output piston 6 can slide smoothly in the through hole 37 An O-ring 6 c is disposed around the output piston 6.

Here, the first housing 3 (indicated by a dotted line in FIG. 2) and the second housing 4 are attached to form the actuator body 2, and before the pyrotechnic combustion is performed by the initiator 20 which is an igniter described later. In the state (hereinafter referred to as the “pre-combustion state”), the first end 6 a is from the end face of the insertion portion 4 a of the second housing 4 fitted into the combustion chamber 31 of the first housing 3. It is in the state of having substantially jumped out to the side. Further, the diameter d1 of the first end 6a is smaller than the diameter d0 of the through hole 37. Therefore, when the output piston 6 slides in the through hole 37 toward the output surface 4 b, between the side surface of the first end 6 a (the surface along the axial direction of the output piston 6) and the inner wall surface of the through hole 37 A constant gap will be formed in the In the pre-combustion state, the end face of the second end 6b is flush with the output face 4b or is placed at a position where it enters the through hole 37 from the output face 4b. Therefore, as shown in FIG. 6 described later, in a state where the actuator 1 is used, the output surface 4b is brought into contact with an object to which a predetermined force is applied, and the actuator 1 is disposed and fixed.

Here, in the state before combustion shown in FIG. The space in the actuator body 2 is made of an elastic material, and a space (corresponding to a first space according to the present invention) including the combustion chamber 31 located on the initiator 20 side and a through hole 37 located on the output It divides into the space (it corresponds to the 2nd space concerning the present invention), and, thereby, the combustion product generated by the explosives combustion in initiator 20 is sealed in combustion chamber 31. . In addition, the detail of the structure of the sealing member 8 and the operation | movement by the pyrotechnic combustion in the initiator 20 are mentioned later.

Here, an example of the initiator 20 will be described based on FIG. The initiator 20 is an electric igniter, and a space for placing the igniter 22 is defined in the cup 21 by a cup 21 whose surface is covered with an insulating cover. And the metal header 24 is arrange | positioned in the space, and the cylindrical charge holder 23 is provided in the upper surface. The charge holder 23 holds the igniter 22. At the bottom of the igniter 22, a bridge wire 26 electrically connecting one of the conductive pins 28 and the metal header 24 is wired. The two conductive pins 28 are fixed to the metal header 24 via the insulator 25 so that they are in an insulated state when no voltage is applied. Furthermore, the opening of the cup 21 from which the two conductive pins 28 supported by the insulator 25 extend is protected by the resin collar 27 in a state in which the insulation between the conductive pins 28 is well maintained.

In the initiator 20 configured as described above, when a voltage is applied between the two conductive pins 28 by the external power supply, a current flows in the bridge wire 26, whereby the igniter 22 burns. At this time, the combustion product of the combustion of the ignition charge 22 is ejected from the opening of the charge holder 23. The initiator cap 14 is formed in a hook-like shape in cross section so as to be hooked on the outer surface of the initiator 20, and is screwed to the first housing 3. As a result, the initiator 20 is fixed to the first housing 3 by the initiator cap 14, so that it is possible to prevent the initiator 20 itself from coming off the actuator body 2 by the pressure generated at the time of ignition by the initiator 20.

Here, as the igniter 22 used in the actuator 1, preferably, a pyrotechnic charge containing zirconium and potassium perchlorate (ZPP), a pyrotechnic charge containing titanium hydride and potassium perchlorate (THPP), titanium and potassium perchlorate Containing explosives (TiPP), explosives containing aluminum and potassium perchlorate (APP), explosives containing aluminum and bismuth oxide (ABO), explosives containing aluminum and molybdenum oxide (AMO), explosives containing aluminum and copper oxide ( ACO), explosives containing aluminum and iron oxide (AFO), or explosives consisting of a combination of several of these explosives. These explosives generate high-temperature and high-pressure plasma at the time of combustion immediately after ignition, but when the temperature reaches normal temperature and the combustible organisms condense, the generated pressure does not contain a gas component, and the generated pressure is rapidly reduced. In addition, you may use explosives other than these as an ignition charge.

Here, although nothing is arranged in the combustion chamber 31 shown in FIG. 1, a gas generating agent which is combusted by the combustion product generated by the combustion of the ignition charge 22 to generate a gas is arranged in the combustion chamber 31. You may do so. In the case where the gas generating agent is disposed in the combustion chamber 31, for example, a single base smokeless explosive consisting of 98% by mass of nitrocellulose, 0.8% by mass of diphenylamine, and 1.2% by mass of potassium sulfate can be mentioned. Moreover, it is also possible to use various gas generating agents used in gas generators for air bags and gas generators for seat belt pretensioners. Unlike the case of using only the igniter 22, the combined use of such a gas generating agent has a small reduction rate of the generated pressure because the predetermined gas generated at the time of combustion contains a gas component even at normal temperature. Furthermore, although the combustion completion time at the time of combustion of the gas generating agent is extremely long compared to the above-mentioned igniter 22, the size, size, shape, particularly surface of the gas generating agent when disposed in the combustion chamber 31. By adjusting the shape, it is possible to change the combustion completion time of the gas generating agent. By adjusting the amount, shape, and arrangement of the gas generating agent as described above, the pressure generated in the combustion chamber 31 can be appropriately adjusted.

Here, details of the sealing member 8 in the pre-combustion state will be described. As shown in FIG. 1, the sealing member 8 is formed so as to cover the first end 6 a of the output piston 6 disposed so as to protrude to the combustion chamber 31 side. Specifically, the sealing member 8 is in contact with the fixed end 35 fixed on the insertion portion 4a of the second housing 4 and the end face of the first end 6a and a contact part positioned so as to cover the end face 34 and an intermediate portion 36 formed between the contact portion 34 and the fixed end 35 and positioned to cover the side surface of the first end 6a. Therefore, as shown in FIG. 1, in the cross section along the axial direction of the actuator 1, the sealing member 8 is formed in a U-shape, and the contact portion 34 corresponding to the bottom surface thereof is fixed to the fixed end 35. It will be located at the starting position on the initiator 20 side (left side as viewed in FIG. 1).

In addition, the sealing member 8 formed of the elastic member as described above is fixed on the end face of the insertion portion 4 a of the second housing 4, and the end of the fixed sealing member 8 is the fixing end 35 Become. The fixing force at the fixed end 35 is determined such that the fixing force of the fixed end 35 to the end face of the insertion portion 4 a is larger than the sliding force of the output piston 6 at the through hole 37. The fixing force is fixed to resist the external force causing the sealing member 8 to be detached from the second housing 4 within the range in which the sealing performance of the combustion product is maintained in the combustion chamber 31 corresponding to the first space. It is a coupling force between the end 35 and the insertion part 4a. As an example of the external force which makes the said detachment | leave, the pressing force etc. which the output piston 6 pushes the sealing member 8 are mentioned. The sliding force is a force applied to the output piston 6 along the sliding direction in order to slide the output piston 6 in the through hole 37. As described above, since the O-ring 6c is disposed in the output piston 6, the force against the frictional force generated between the output piston 6 and the through hole 37 through the O-ring 6c is approximately the same as the sliding force. Become. In addition to the O-ring, when there is an element that generates a frictional force, the sliding force is determined in consideration of the frictional force by the element.

Here, for setting of the fixing force at the fixed end 35, for example, the fixing of the sealing member 8 to the end face of the insertion portion 4a is maintained sufficiently stably against the force received from the output piston 6 Alternatively, a fixed force may be generated at the fixed end 35 by multiplying the assumed sliding force of the output piston 6 by a predetermined safety factor λ. The predetermined safety factor λ may be set to 10, for example. For example, in two cases shown in Table 1 below (φ 5.8 mm in Case 1, φ 8.8 mm in Case 2) where the diameters of the output piston 6 are different, the measurement experiment of the sliding force of the output piston 6 is performed three times, The average value is taken as the reference sliding force in each case (0.28 kgf in case 1, 0.51 kgf in case 2). The force calculated by multiplying the standard sliding force by the safety factor of 10 is taken as the fixing force at the fixed end 35 corresponding to each case (2.8 kgf for case 1, 5.1 kgf for case 2), The fixed end 35 and the end face of the insertion portion 4a are fixed so that the fixing force is realized.

Next, a method of assembling the actuator 1 will be described based on FIG. FIG. 4 shows the flow in which the actuator 1 is assembled in the order of step 1 to step 4.
(Step 1)
The output piston 6 is disposed inside the second housing 4. In this state, the second end 6b of the output piston 6 projects beyond the output surface 4b. Then, the fixed end 35 of the sealing member 8 is fixed to the end face of the insertion portion 4 a of the second housing 4 by an adhesive. The type of adhesive, bonding conditions, and the like are adjusted such that the fixing force by the adhesive is equal to or more than the value obtained by multiplying the sliding force of the output piston 6 by a predetermined safety factor λ as described above. The first end 6 a of the output piston 6 and the contact portion 34 of the sealing member 8 are not in contact with each other immediately after the fixed end 35 is fixed to the end face of the insertion portion 4 a.
(Step 2)
In the next step, the second end 6b protruding from the output surface 4b is pushed into the second housing 4 to form a U-shaped recess (the intermediate portion 36 and the contact portion 34 of the sealing member 8). And the first end 6a is fitted into the recess formed in FIG. Since the diameter of the recess by the intermediate portion 36 is slightly larger than the diameter of the first end 6 a, the force applied to the output piston 6 when pushing the second end 6 b is approximately the output piston 6 and the through hole 37. Between the two, that is, the sliding force.

(Step 3)
Then, when the pushing of the output piston 6 proceeds, the first end 6 a contacts the contact portion 34. At this time, since the fixing force at the fixed end 35 of the sealing member 8 is set to 10 times the sliding force of the output piston 6 as described above, the reaction force from the output piston 6 is rapidly large simultaneously with the contact. Become. Therefore, it is possible to accurately and promptly recognize that the contact state between the first end 6a and the contact portion 34 is formed by the pressing operation. This means that excessive pressure is exerted on the sealing member 8 from the output piston 6 by pushing the output piston 6 too much, so that the sealing member 8 can be properly fixed (that is, the combustion products can be sealed in the combustion chamber 31) It is possible to avoid damaging the fixed state required for the In particular, since the inside of the sealing member 8 can not be seen from the outside, it is preferable to rapidly change the force pushing the output piston 6 when the above-mentioned contact state is formed, as a suitable contact between the contact portion 34 and the first end 6a. It is extremely useful for securing the condition. In this manner, the preferable contact state between the contact portion 34 and the first end 6a is an extremely important element in order to ensure the action of the predetermined force on the object by the actuator 1 as described later. It is. When the contact portion 34 and the first end 6a are in contact with each other, the end face of the second end 6b of the output piston 6 is flush with the output surface 4b or the through hole 37 from the output surface 4b. Is held in place.

(Step 4)
Then, after the contact portion 34 and the first end 6 a are in contact with each other, the second housing 4 is screwed into the first housing 3. At this time, the insertion portion 4 a of the second housing 4 enters the inside of the first housing 3. As a result, the assembly of the actuator 1 is completed, and the combustion chamber 31 is formed by the sealing member 8 therein.

In the assembling method shown in FIG. 4, the second end 6b is pushed into the second housing 4 and the first end 6a is fitted in the recess of the sealing member 8, and the first end 6a and the contact portion 34 are formed. After the contact, the first housing 3 and the second housing 4 are screwed together, but instead of this aspect, the assembly may be performed as follows. That is, in a state in which the output piston 6 is disposed in the second housing 4 and the sealing member 8 is attached in step 1, the second housing 4 is screwed to the first housing 3 (see step 4). Thereafter, as in step 2, the second end 6b is pushed into the second housing 4 and the first end 6a is fitted into the recess of the sealing member 8, and the first end 6a is the contact portion 34 of the sealing member 8. Contact (see step 3). Since the reaction force from the output piston 6 rapidly increases simultaneously with the contact between the first end 6a and the contact portion 34 as described above even according to the flow of such assembly, it is understood that the contact state is formed. It can be recognized accurately and promptly.

Furthermore, in another aspect, the sealing member 8 is first attached to the first housing 3, ie, the sealing member 8 is fixed to the first housing 3 via the fixed end 35, and then the output piston 6 is The second housing 4 disposed at the bottom may be screwed to the first housing 3. In this case, the dimensions and shapes of the output piston 6 and the second housing 4 are adjusted so that the contact state between the contact portion 34 and the first end 6 a is formed, and the sealing member 8 is appropriately fixed. Thus, a suitable configuration, such as an inset groove for joining the fixed end 35 may be formed on the inner wall of the first housing 3.

Here, the movement of the sealing member 8 when the igniter 22 of the initiator 20 burns and the injection state of the injection solution in the actuator 1 will be described based on FIG. FIG. 5 shows the configuration of the actuator 1 in the pre-combustion state in the upper stage, and shows the configuration of the actuator 1 in a state in which the actuator 1 is actuated by combustion of the ignition charge 22 (hereinafter referred to as “operating state”) in the lower stage. . In the comparison between the pre-combustion state and the operating state in FIG. 5, the positions of the fixed end 35 of the sealing member 8 are aligned, and both states are displayed side by side in the axial direction of the actuator 1. Then, the position of the fixed end 35 common to both states is indicated as X0, and the reference line including the position X0 is indicated as L0.

Furthermore, in the pre-combustion state, the position of the contact portion 34 is indicated by X1, and as described above, the position is on the side of the initiator 20 with respect to the position X0. The position of the end face of the second end 6b of the output piston 6 at this time is indicated by F1. Here, when the ignition charge 22 burns, the combustion product diffuses into the combustion chamber 31, and the pressure in the combustion chamber 31 rises. Thereby, the pressure is applied also to the sealing member 8, but in particular, the pressure for pressing the output piston 6 to the output surface 4 b side is applied to the output piston 6 via the contact portion 34 of the sealing member 8. It is an applied pressure. Therefore, the end surface of the first end 6 a of the output piston 6 with which the contact portion 34 contacts is the end surface that receives the drive energy from the initiator 20.

Thus, the contact portion 34 is a portion of the sealing member 8 for transmitting the drive energy generated by the combustion of the igniter 22 to the output piston 6 side. As a result, in the sealing member 8, the contact portion 34 moves to the output surface 4 b side and the output piston 6 slides in the through hole 37. Along with this, the second end 6b of the output piston 6 is in a state where it protrudes from the output surface 4b, and the amount of the projection interlocks with the sliding amount of the output piston 6. As a result, the output piston 6 can exert a predetermined force on the object disposed on the output surface 4 b side. Here, in the operation state in which the sliding of the output piston 6 is completed, the stopper portion 4c of the second housing 4 that forms a reduced diameter portion having a smaller inner diameter in the vicinity of the output surface 4b of the through hole 37 A part of the piston 6 is in contact, and the output piston 6 is prevented from jumping out of the through hole 37. The position of the contact portion 34 in this state is an action position, which is indicated by X2, and is a position on the output surface 4b side with respect to the position X0. The position of the end face of the second end 6b is indicated by F2.

As described above, in the actuator 1, in the process of combustion of the igniter 22, the contact portion 34 of the sealing member 8 moves from the start position X1 in the pre-combustion state to the action position X2 in the operation state. The movement distance (X2-X1) due to the movement of the contact portion 34 corresponds to the movement distance (F2-F1) of the output piston 6 for a predetermined force action. Then, along with this movement, the sealing member 8 is deformed so as to turn over. That is, the movement distance of the output piston 6 necessary to apply a predetermined force is secured by the reverse deformation of the sealing member 8. As described above, when the sealing member 8 is subjected to reverse deformation, the sealing member 8 itself does not have to be elastically deformed to a large extent, and the displacement of the intermediate portion 36 excluding the fixed end 35 and the contact portion 34 is the main. Even if the intermediate portion 36 expands as a result of the contact portion 34 being largely displaced to the output surface 4 b side by the driving energy generated by the combustion of the ignition charge 22, the intermediate portion 36 first becomes the upper portion of FIG. It moves to the output surface 4b side from the starting position shown in, and then extends as the contact portion 34 is displaced. Therefore, it is possible to suppress the amount of elastic deformation of the intermediate portion 36 itself, and it is possible to suppress the damage of the sealing member 8 while sufficiently securing the moving distance of the output piston 6 for the predetermined force action. Thereby, the drive energy by combustion can be suitably transmitted to output piston 6, and, thereby, the operation of actuator 1 can be performed efficiently.

Further, as described above, the diameter d1 of the first end 6a of the output piston 6 is smaller than the inner diameter d0 of the through hole 37. Therefore, when the above-described reverse deformation of sealing member 8 is performed, intermediate portion 36 enters the gap between first end 6 a and through hole 37 and is deformed along the inner wall surface of through hole 37. And expansion can be performed smoothly. The contact portion 34 is not necessarily in contact with the end face of the first end 6 a of the output piston 6 when in the acting position.

Application Example 1
Here, FIG. 6 shows an electric circuit breaker 100 as a first example to which the actuator 1 is applied. The electric circuit breaker 100 is formed by fixing the actuator 1 to the conductor piece 50 via the fixed housing 62.

The conductor piece 50 forms a part of an electric circuit when the electric circuit breaker 100 is attached to the electric circuit, and the first connection portion 51 at both ends, the second connection portion 52, and both connection portions And a cutting piece consisting of a cutting portion 53 between the two. Each of the first connection portion 51 and the second connection portion 52 is provided with

connection holes

51a and 52a for connecting to another conductor (for example, a lead wire) in the electric circuit. In addition, although the conductor piece 50 shown in FIG. 6 is formed so that the 1st connection part 51, the 2nd connection part 52, and the cutting part 53 may become stepped shape, the 1st connection part 51, the 2nd connection The portion 52 and the cutting portion 53 may be formed to be arranged substantially in the same straight line. And the cutting part 53 is being fixed so that the output surface 4b of the actuator 1 may be contacted. Therefore, the end surface (the end surface of the second end 6 b) of the output piston 6 in the actuator 1 faces the cutting portion 53. The conductor piece 50 formed in this manner is the object in the above embodiment, and in particular, the cutting portion 53 is a portion on the object to which a predetermined force from the actuator 1 acts.

Furthermore, in the fixed housing 62, a box-shaped insulating portion 63 made of synthetic resin is formed on the opposite side of the actuator 1 across the cutting portion 53, and an insulating space 61 is formed in the inside.

In the electric circuit interrupting device 100 configured as described above, for example, when it is determined that it is necessary to immediately stop the energized state in the electric circuit due to an external impact or the like, for example, a trigger signal from a sensor that detects the impact. Is received by the control unit 70. Then, the control unit 70 having received the trigger signal issues an operation command to the initiator 20, and as a result, the initiator 20 operates. When the initiator 20 operates, the output piston 6 slides as described above, and the kinetic energy causes the shearing force to act on the cutting portion 53, whereby the cutting portion 53 is cut. Thereby, in the conductor piece 50 which forms a part of electric circuit to which the electric circuit breaker 100 is attached, conduction between the first connection portion 51 and the second connection portion 52 is cut off. In addition, since the cut piece of the cutting part 53 cut | disconnected by the output piston 6 is accommodated in the insulation space 61 in the insulation part 63, the said conduction | electrical_connection interruption can be made more reliable.

From the above, in the electric circuit breaker 100 to which the actuator 1 according to the present invention is applied, the actuator 1 can be efficiently driven, and this is an electric circuit breaker 100 that should realize reliable continuity when needed. Are extremely useful. In addition, as an application example of the actuator 1, a drilling machine or the like that opens a hole in an object can be exemplified.

Application Example 2
Here, FIG. 7 shows a syringe 200 as a second example to which the actuator 1 is applied. The syringe 200 is a needleless syringe that ejects the injection target substance without passing through the injection needle and feeds it to the injection target area. FIG. 7 is a cross-sectional view of the syringe 200. In the following description of the present application, the injection target substance injected into the injection target area of the object by the syringe 200 is generically referred to as "injection fluid". However, this is not intended to limit the content or form of the substance to be injected. In the substance to be injected, the component to be delivered to the skin structure may or may not be dissolved, and the substance to be injected may also be ejected from the nozzle portion 209 to the skin structure by pressurizing The specific form is not particularly limited, and various forms such as liquid, gel, powder and the like can be adopted.

Here, as shown in FIG. 8, the syringe 200 is configured by screwing the syringe unit 205 onto the actuator 1. In addition, since the actuator 1 of this application example has a mechanism for screwing the syringe unit 205, the actuator 1 is partially different from the configuration described above, and this point will be described. In this application example, the output piston 6 is disposed in the through hole 37 formed in the second housing 4, but the stopper portion 4 c is not provided in the through hole 37 as described above. Therefore, in the assembly of the syringe 200, the sealing member 8 is not fixed to the second housing 4 in a state where the output piston 6 is disposed inside the second housing 4 as in step 1 of FIG. After fixing 8 to the second housing 4, the output piston 6 may be inserted into the through hole 37 so that the first end 6 a of the output piston 6 faces the sealing member 8. Also in this case, as described above, since the fixing force at the fixed end 35 of the sealing member 8 is set larger than the sliding force of the output piston 6 at the through hole 37, the sealing member 8 is excessive. It is possible to form a suitable contact between the contact portion 34 and the first end 6 a of the output piston 6 without applying any force.

Then, on the syringe distal end side of the second housing 4 (the side on which the syringe unit 205 is disposed), an attachment space 204 c in which the syringe unit 205 is attached is formed. The bottom surface of the mounting space 204c is formed as an output surface 204b, and the output piston 6 is configured to protrude from the output surface 204b by the operation of the initiator 20 in the actuator 1. Further, on the inner wall surface of the side wall 204d forming the mounting space 204c, a screw thread for screwing and attaching to the syringe portion 205 is formed.

In addition, the syringe unit 205 includes a syringe unit main body 211 having a storage chamber 233 for storing the injection solution ML, a nozzle unit 209 having a flow path through which the injection solution flows, and a nozzle holder provided with the nozzle unit 209 It has 210. The nozzle holder 210 is attached to the syringe unit main body 211 by a holder cap 212 with the gasket 213 interposed therebetween. Further, a screw thread is formed in the syringe unit main body 211 so as to be screwed into the mounting space 204 c of the second housing 4. When the syringe unit 205 is attached to the second housing 4, the through hole 37 in the second housing 4 and the storage chamber 233 in the syringe unit main body 211 form a continuous space. In the attached state, the injection solution ML is accommodated in the accommodation chamber 233 in a fluid-tight manner by the plunger 207, and the plunger 207 is exposed to the through hole 37 side. Here, the plunger 207 is disposed so as to be slidable in the storage chamber 233, and further slides to pressurize the injection solution ML, and injection of the injection solution from the nozzle portion 209 is performed. In addition, the plunger 207 is formed of a rubber member in which silicon oil is thinly applied to the surface so as to slide in the storage chamber 233 smoothly.

In the state before the attachment of the syringe unit 205 to the second housing 4 (the state shown in FIG. 8), the second end 6b of the output piston 6 is held at a position closer to the inside of the through hole 37 than the output surface 204b. On the other hand, the end (the end not in contact with the injection solution ML) of the plunger 207 of the syringe unit 205 is in a state of slightly projecting outward from the end surface of the syringe unit main body 211. Thus, when the syringe unit 205 is screwed to and attached to the second housing 4, a state in which the plunger 207 is in contact with the second end 6 b of the output piston 6 disposed in the second housing 4 is formed. . The fixing force at the fixed end 35 of the sealing member 8 is set to be larger than the force capable of pushing out the injection solution ML stored in the storage chamber 233 by the plunger 207. Even if the output piston 6 can be largely interfered with, as a result, the injection solution ML is easily discharged, and thus the sealing member 8 can be prevented from being subjected to an excessive force and being damaged.

A plurality of nozzle portions 209 may be formed in the nozzle holder 210 or one nozzle portion may be formed. In the case where a plurality of nozzle portions are formed, a flow path corresponding to each nozzle portion is formed such that the injection solution ML released to each nozzle portion is fed as evenly as possible. Furthermore, when a plurality of nozzle portions 209 are formed, it is preferable that the nozzle portions be arranged at equal intervals around the central axis of the syringe 200. Also, the flow passage diameter of the nozzle portion 209 is configured to be smaller than the inner diameter of the through hole 37. Thereby, the injection pressure of the injection liquid at the time of injection can be raised suitably.

Here, the movement of the sealing member 8 when the initiator 20 operates and the injection state of the injection solution in the syringe 200 will be described based on FIG. FIG. 9 shows the configuration of the syringe 200 in the pre-ignition state in the upper stage, and the configuration of the syringe 200 in the state in which injection of the injection solution is completed by combustion of the igniter 22 (hereinafter referred to as “injection complete state”) in the lower stage. It shows. In the comparison between the pre-ignition state and the injection complete state in FIG. 9, the positions of the fixed end 35 of the sealing member 8 are aligned, and both states are displayed side by side in the axial direction of the syringe 200. And the position of the fixed end 35 common to both states is displayed as X10, and the reference line including the position X10 is displayed as L10.

Furthermore, in the pre-combustion state, the position of the contact portion 34 is indicated by X11, which is the position on the side of the initiator 20 with respect to the position X10 as described above. Further, the position of the plunger 207 at this time is indicated by P11. Here, when the ignition charge 22 of the initiator 20 burns, the combustion product diffuses into the combustion chamber 31 of the actuator 1 and the pressure in the combustion chamber 31 rises. As a result, the pressure is also applied to the sealing member 8, but in particular, the pressure for pressing the output piston 6 toward the syringe portion 205 is the pressure applied to the output piston 6 via the contact portion 34 of the sealing member 8. It is an applied pressure. Therefore, the end face of the first end 6 a of the output piston 6 in contact with the contact portion 34 is an end face that receives the energy injected from the initiator 20.

As described above, the contact portion 34 is a portion of the sealing member 8 for transmitting the injection energy generated by the combustion of the igniter 22 to the output piston 6 side. As a result, in the sealing member 8, the contact portion 34 moves to the syringe portion 205 side and the output piston 6 slides in the through hole 37. Further, since the contact portion 34 and the output piston 6 are suitably in contact with each other as described above, the transmission of the injection energy from the contact portion 34 to the output piston 6 is suitably performed. Then, as the output piston 6 slides, the plunger 207 presses the injection solution ML, and as a result, the injection solution ML is ejected from the nozzle portion 209 to the injection target area. Here, in the injection completion state in which the injection of the injection solution ML is completed, the contact portion 34 is in contact with the end face of the first end 6 a of the output piston 6 as shown in the lower part of FIG. The sliding of the output piston 6 is limited because it is in contact with the inner wall surface of the nozzle holder 210 in which the portion 209 is formed. The position of the contact portion 34 in this state is the injection position and is indicated by X12, and is the position on the syringe portion 205 side with respect to the position X10. The position of the plunger 207 is indicated by P12.

As described above, in the syringe 200, in the process of combustion of the igniter 22, the contact portion 34 of the sealing member 8 moves from the start position X11 in the pre-combustion state to the injection position X12 in the injection completion state. The movement distance (X12-X11) by the movement of the contact portion 34 corresponds to the movement distance (P12-P11) of the plunger 207 for injection of the injection solution ML. Then, along with this movement, the sealing member 8 is deformed so as to turn over. That is, the movement distance of the output piston 6 and the plunger 207 necessary for injecting the injection solution ML is secured by the reverse deformation of the sealing member 8. As described above, when the sealing member 8 is subjected to reverse deformation, the sealing member 8 itself does not have to be elastically deformed to a large extent, and the displacement of the intermediate portion 36 excluding the fixed end 35 and the contact portion 34 is the main. Even if the intermediate portion 36 expands as a result of the contact portion 34 being largely displaced to the side of the syringe portion 205 by the injection energy generated by the combustion of the igniter 22, the intermediate portion 36 first becomes the upper portion of FIG. It moves to the syringe part 205 side from the state shown in (1), and then extends along with the displacement of the contact part 34. Therefore, the amount of elastic deformation of the intermediate portion 36 itself can be suppressed small, and breakage of the sealing member 8 can be suppressed while sufficiently securing the moving distance of the plunger 207 for injection of the injection solution ML. . This makes it possible to keep the sealing member 8 sufficiently suppressing the mixing of the combustion product into the injection solution.

Second Embodiment
FIG. 10 shows a second embodiment of the actuator 1 of the present invention. In the first embodiment, drive energy from the initiator 20 is applied to the output piston 6 through the sealing member 8, and the sealing member 8 is directly exposed to the combustion gas. On the other hand, in the present embodiment, the driving energy is once propagated to the auxiliary piston 60 and then indirectly acted on the output piston 6 through the sealing member 8, and the sealing member 8 directly contacts the combustion product. It can be suppressed from being exposed. In the present embodiment, the actuator body 2 is formed by the first housing 3A and the second housing 4, and the same reference numerals as in the first embodiment denote the same parts as those in the first embodiment. The detailed description is omitted.

A combustion chamber 31 is formed in the first housing 3A, and a combustion product by the initiator 20 is diffused in the combustion chamber 31. Here, an auxiliary piston 60 made of metal is further disposed in the combustion chamber 31 and held slidably in the combustion chamber 31. The auxiliary piston 60 is disposed such that one end faces the initiator 20 and the other end sandwiches the contact portion 34 of the sealing member 8 with the first end 6 a of the output piston 6 . Therefore, when the igniter 22 burns due to the operation of the initiator 20, driving energy is input to the end of the auxiliary piston 60 facing the initiator 20, and then transmitted to the output piston 6 via the contact portion 34 of the sealing member 8. It will be done. Therefore, the combustion of the igniter 22 causes the output piston 6 to slide along with the auxiliary piston 60. Also at this time, the sealing member 8 performs reverse deformation as in the first embodiment described above. In particular, in the present embodiment, since the contact portion 34 is in a state of being sandwiched between the output piston 6 and the auxiliary piston 60, the deformation of the sealing member 8 is limited to a specific direction, thereby reversing the above. The deformation is facilitated. Further, in the present embodiment, since the driving energy is once input to the auxiliary piston 60, direct exposure of the sealing member 8 to the combustion product can be suppressed, and as a result, the sealing member 8 is not The thermal stress applied can be reduced, and the breakage can be more reliably suppressed.

Thus, the actuator 1 according to the present embodiment can also be suitably applied to the electric circuit breaker shown in FIG. 6, the syringe shown in FIG.

Example 1
In the actuator 1 which concerns on the said 1st Embodiment, the confirmation experiment which confirmed whether the sealing by the sealing member 8 in the case of the explosives combustion in the initiator 20 is achieved was performed. The material of the sealing member 8 adopts NBR (nitrile rubber) as a rubber material and at the same time changes the hardness of the rubber material and the temperature condition of the actuator 1 at the time of operation, the breakage etc. in the sealing member 8 It confirmed visually.

Specifically, the hardness of the rubber material is two types of 50 degrees and 70 degrees. The temperature conditions of the actuator 1 are three types: high temperature (50 degrees), normal temperature (20 degrees), and low temperature (0 degrees). Furthermore, the pressure in the combustion chamber 31 at the time of explosives combustion is 30 MPa in peak value, and the thickness of the sealing member 8 is 1 mm. Under each of the hardness and temperature conditions, the initiator 20 was burned three times at each time, and the number of breakages and the like was observed in the sealing member 8 was confirmed. As a result, no breakage was observed in all the conditions.

Example 2
In the actuator 1 which concerns on the said 2nd Embodiment, the confirmation experiment which confirmed whether the sealing by the sealing member 8 in the case of the explosives combustion in the initiator 20 is achieved was performed. The material of the sealing member 8 employs chloroprene and NBR as rubber materials, and in each rubber material, visual observation of breakage or the like in the sealing member 8 when the temperature condition of the actuator 1 at the time of operation is changed. It confirmed by.

Specifically, when the rubber material is chloroprene, its hardness is 65 degrees, and when it is NBR, its hardness is 70 degrees. The temperature conditions of the actuator 1 are three types: high temperature (50 degrees), normal temperature (20 degrees), and low temperature (0 degrees). Furthermore, the pressure in the combustion chamber 31 at the time of explosives combustion is 30 MPa in peak value, and the thickness of the sealing member 8 is 1 mm. Under each rubber material and temperature conditions, the initiator 20 was burned three times at a time, and the number of failures was found in the sealing member 8. As a result, no failure was observed in all conditions.

From the above, it can be understood that NBR can be suitably adopted as the rubber material for forming the sealing member 8 in any of the embodiments. Further, in the second embodiment, chloroprene can be further adopted as the rubber material. In addition, the result of the said Example is an example to the last, and adjusting the hardness of a rubber material, or limiting the temperature conditions of the actuator 1 also makes chloroprene the said rubber material also in 1st Embodiment. It is considered possible to adopt.

1 · · · Actuator 2 · · · Actuator body 6 · · · Output piston 8 · · · Sealing member 20 · · · Initiator 22 · · · Ignition drug 31 · · · · · · · · · · ... contact portion 35 ... fixed end portion 36 ... intermediate portion 37 ... through hole 60 ... ... auxiliary piston 62 ... ... fixed housing 70 ... ... control portion 100 ... ··· Electric circuit interruption device 200 ··· Syringe 205 ··· Syringe portion 207 ··· Plunger 209 ··· Nozzle portion

Claims

An actuator body having an axially formed through hole, and an output piston portion slidably disposed in the through hole, the output piston portion being protruded from the output surface of the actuator body An actuator that applies a predetermined force to an object,
An igniter for burning a pyrotechnic charge, wherein the igniter for applying driving energy for sliding the output piston portion to the output piston portion by the pyrotechnic combustion of the igniter.
A space in the actuator body is divided into a first space in which the igniter is disposed and a second space in which the output piston portion is disposed, and the combustion products generated by the igniter are divided into first components. A sealing member for sealing in the space;
And further
The output piston portion has a working end that acts on the object, and a predetermined end having a predetermined end face that receives the driving energy.
The sealing member is
A fixed end fixed to an inner wall defining a space in the actuator body;
A contact portion which comes into contact with the predetermined end face of the predetermined end portion at the time of the pyrotechnic combustion in the ignition device
Have
The fixing force of the fixed end relative to the inner wall is greater than the sliding force of the output piston portion at the through hole,
In the state before the pyrotechnic combustion in the igniter, the contact portion is located at the start position on the igniter side with respect to the fixed end,
By the pyrotechnic combustion in the igniter, the contact portion contacts with the predetermined end face and is configured to move to the acting position on the output surface side with respect to the fixed end with sliding of the output piston portion. The
Actuator.
Before the pyrotechnic combustion in the igniter, the output piston portion is configured to be able to be pushed into the through hole from the working end side.
The actuator according to claim 1.
Even if the output piston portion is released from the pressed state in a state where the output piston portion is pushed into the through hole and the predetermined end face is in contact with the contact portion, the working end portion of the output piston portion It is held at a position flush with the output surface or at a position in the through hole than the output surface,
The actuator according to claim 2.
The sealing member is formed of an elastic member.
The actuator according to any one of claims 1 to 3.
The sealing member covers a side surface portion of the predetermined end along the sliding direction of the output piston portion in a state before the pyrotechnic combustion in the igniter, and between the fixed end and the contact portion. Further comprising an intermediate part to be formed,
The contact portion moves from the start position to the action position while the intermediate portion extends in the sliding direction along with the sliding of the output piston portion due to the explosive combustion in the igniter.
The actuator according to claim 4.
The outer diameter of the output piston portion at the predetermined end is smaller than the inner diameter of the through hole, and with the sliding of the output piston portion due to the explosive combustion in the igniter, the intermediate portion is Extends in the sliding direction along the inner wall surface,
The actuator according to claim 5.
The auxiliary piston portion is further slidably disposed in the through hole and disposed on the first space side, and is disposed so as to sandwich the contact portion of the sealing member with the predetermined end surface of the output piston portion. Further comprising an auxiliary piston portion,
The auxiliary piston portion faces the igniter, and the igniter side end portion to which the drive energy is input, and the output piston portion side which transmits the drive energy to the predetermined end face of the output piston portion through the contact portion. Having an end,
The actuator according to any one of claims 1 to 6.
An actuator according to any one of claims 1 to 7;
A fixed housing for fixing the actuator at a position where the output piston unit applies a shear force as the predetermined force to the object forming a part of an electric circuit;
A control unit that operates the igniter when receiving an external trigger signal;
An electrical circuit breaker device.
A syringe for injecting a substance to be injected into a region to be injected, the syringe comprising:
An actuator according to any one of claims 1 to 7;
A storage chamber capable of storing the injection target substance, a plunger which is the object and pressurizes the injection liquid target substance in the storage chamber, the injection target substance in the storage chamber pressurized by the plunger flows A syringe portion including a flow path and a nozzle portion for injecting the injection target substance from an injection port formed at a tip end of the flow path, wherein the working end portion of the output piston portion contacts the plunger A syringe unit attached to the actuator so as to be placed in position;
Equipped with a syringe.