Pressure trip device and method for manufacturing same

Abstract

The present invention provides a pressure trip device comprising: a housing having an inlet; a shooter disposed in the longitudinal direction inside the housing such that the upper side is exposed to the outside of the housing; and an elastic member which is in contact with the shooter and elastically supports the shooter, wherein the housing is bonded by ultrasonic welding.

Description

Abtrip device and method of manufacturing the same

[0001] The present invention relates to a trip device for a circuit breaker and a method for manufacturing the same.

[0002] A circuit breaker is a device designed to automatically interrupt a circuit when a current exceeding the rated current flows through it, thereby preventing accidents caused by overcurrent. Among these, a Molded Case Circuit Breaker (MCCB) is installed in the wiring and is housed within a molded case.

[0003] A circuit breaker includes a fixed contact that is electrically connected to an external power source or load, and a movable contact that is electrically connected to or disconnected from the fixed contact.

[0004] When an overcurrent flows through a circuit breaker, the fixed contact and the movable contact separate, and the current is interrupted. This is called the tripping process, and the device that performs the tripping process is called a tripping device.

[0005] In a circuit breaker according to the prior art, when an overcurrent is passed, a shooter provided in the detection mechanism rotates.

[0006] When normal current is applied, the shooter restrains the nail. However, when a current higher than the normal current is applied, as the shooter rotates, the nail is released from the shooter and rotates, and the mechanism connected to the nail also rotates.

[0007] In other words, when a circuit breaker trips due to a fault current, it guides the arc generated between the fixed contact of the fixed contact and the movable contact of the movable contact into the arc extinguishing chamber, expands and cools the arc, and extinguishes it.

[0008] This sequential mechanism causes damage to the movable and fixed contacts due to prolonged exposure to the arc during the interruption operation, which can lead to future failures such as abnormal current flow and temperature rise.

[0009] To solve this problem, improvements are made by inserting a Pressure Trip device (shooter, PT shooter) to reduce the cutoff time.

[0010] Specifically, the arc pressure generated during the fault current flows into the pressure trip device (PT Shooter ASS'Y) through the inlet, the incoming arc pressure operates the shooter, and the nail rotated by the operation of the shooter operates the mechanism to implement physical blocking.

[0011] That is, when a large short-circuit current is applied to a circuit breaker, a current-limiting operation occurs in which the movable contact is separated from the fixed contact due to the electromagnetic repulsion between the fixed contact and the movable contact, and at this time, an arc is generated between the contacts, causing the internal pressure of the single-pole circuit breaker unit to rise.

[0012] Due to the increased internal pressure, an arc flows into the pressure trip device through the pressure exhaust hole on the side of the single-pole blocking unit, and as the pressure of the incoming arc rises above a certain level, it pressurizes the elastic member supporting the shooter of the pressure trip device, causing the shooter to move counterclockwise and trip the opening and closing mechanism.

[0013] When the fault current is interrupted by the tripping operation of the circuit breaker, the pressure is released, and the shooter returns to its original state by the elastic restoring force of the elastic member.

[0014] The above details can be summarized as follows.

[0015] Fault current generation → Inflow of arc pressure into the pressure trip device → Operation of the shooter (PT shooter) → Unlocking of the nail → Operation of the mechanism

[0016] In addition, after the shooter operation, the trip device returns to its initial position by the elastic member within the trip device.

[0017] FIG. 1 is a first exploded perspective view illustrating the configuration of a conventional ap-trip device, and FIG. 2 is a second exploded perspective view illustrating the configuration of a conventional ap-trip device.

[0018] The aptrip device is a structure having a hollow interior and has an external housing.

[0019] The outer housing not only protects and supports the internally installed components but also serves to prevent incoming gas flow from escaping to the outside.

[0020] The external housing consists of a case (11) and a cover (12).

[0021] Referring to FIGS. 1 and 2, a conventional pressure trip device (10) is manufactured by pressing a case (11) and a cover (12).

[0022] The press-fit device (10) includes a plurality of press-fit protrusions (12a) formed to protrude a certain length on the inner surface of the cover (12) facing the case (11). The press-fit protrusions (12a) are pressed into the press-fit protrusion insertion holes (11a) provided in the case (11), thereby joining the case and the cover.

[0023] However, a problem arises in that a conventional pressure trip device (10) assembled by a press-fit method cannot maintain a perfect seal due to the incoming high-pressure arc pressure.

[0024] That is, the pressure trip device (10) has a defect in which the case (11) and cover (12) are separated due to the high arc pressure generated when the short circuit is interrupted, so the sealed state is not maintained.

[0025] The aptrip device (10), with the case (11) and cover (12) separated, leaks arc and carbonized material, which is a byproduct thereof, to the outside. The leaked carbonized material can contaminate the interior of the circuit breaker. If the carbonized material adheres to the insulating material composition of the circuit breaker, the inter-phase insulation becomes weak, leading to insulation breakdown and the possibility of a short circuit between different phases.

[0026] In addition, if leaked carbonized material gets stuck between the shooters, the return spring deteriorates, which can cause the trip device to malfunction and, furthermore, lead to a decrease in the reliability of the trip device's return operation.

[0027] Patent Document 1 discloses a pressure trip device for a circuit breaker, comprising: a housing having an inlet formed on one side; a shooter rotatably installed inside the housing and rotated in one direction by a gas flow introduced into the housing; a first elastic member having one end supported by the housing and the other end elastically supported by contacting one side of the shooter; and a second elastic member having one end fixed to the housing and applying a resilient force when the shooter contacts it.

[0028] Patent Document 1 is configured to apply elastic restoring force to the shooter by adding a second elastic member in addition to the first elastic member, thereby effectively reducing return failures without reducing the speed of the pre-trip operation in the event of a fault, and improving the operational reliability of the circuit breaker.

[0029] However, Patent Document 1 does not include a configuration of a pressure trip device that can safely maintain a sealed state even under high arc pressure.

[0030] Patent Document 2 discloses a circuit breaker for wiring having a tripping device comprising: a case coupled to one side of a base assembly and having an arc inlet hole formed therein that communicates with an arc discharge hole of the base assembly; a trip shooter inserted into the case so as to be movable up and down; a rotating plate rotatably installed in the case to push up the trip shooter and open and close the arc inlet hole; and a cover coupled to the case.

[0031] Patent Document 2 is configured so that the interior of the pressure trip device is closed by a rotating plate after the arc gas is introduced, thereby minimizing the inflow of arc debris or foreign substances into the pressure trip device.

[0032] However, Patent Document 2 also does not include a configuration of an aptrip device in which a sealed state can be safely maintained.

[0033] Therefore, there is a need to develop a pressure trip device that can maintain a tightly sealed state without the case and cover separating even under high arc pressure, thereby preventing the leakage of arc pressure and flying debris to the outside and improving the reliability of the trip device return operation.

[0034] [Prior Art Literature]

[0035] [Patent Literature]

[0036] (Patent Document 1) Patent Document No. 10-2022-0117423 (Published Aug. 24, 2022)

[0037] (Patent Document 2) Patent Document No. 20-2024-0000375 (Published Feb. 27, 2024)

[0038] The present invention has been devised to solve the above-mentioned problem, and the objective of the present invention is to provide an pressure trip device and a method for manufacturing the same, which prevents the external leakage of arc pressure and flying debris by maintaining a tightly sealed state without the case and cover opening even under high arc pressure.

[0039] Another objective of the present invention is to provide an overtrip device capable of improving the reliability of the return operation of the trip device and a method for manufacturing the same.

[0040] Another objective of the present invention is to provide an Aptrip device that applies a non-contact coupling method to a case and a cover using ultrasound, and a method for manufacturing the same.

[0041] Another objective of the present invention is to provide an aptrip device and a method for manufacturing the same, wherein welding is completed within a few seconds, thereby ensuring high productivity.

[0042] Another objective of the present invention is to provide an economical aptrip device and a method for manufacturing the same, in which welding is implemented without the use of additional adhesive materials, thereby reducing costs.

[0043] To solve the above problem, the pressure trip device of the present invention comprises: a housing having an inlet; a shooter disposed longitudinally inside the housing such that its upper side is exposed to the outside of the housing; and an elastic member in contact with the shooter to elastically support the shooter, wherein the housing is joined by ultrasonic welding.

[0044] According to one example related to the present invention, the housing comprises: a case having an internal space with one side open; and a cover that seals one side of the case.

[0045] Preferably, the cover includes a joining rib formed to protrude along the perimeter of the cover in contact with the case and ultrasonically welded to the case, and the case includes a cover contact surface that contacts the cover and where the joining rib is ultrasonically welded.

[0046] The above joining rib is in contact at a predetermined inner position at the edge of the cover contact surface.

[0047] In addition, the above joining rib includes a first joining rib arranged longitudinally along the perimeter of the edge side of the cover.

[0048] The above case includes a gas passage that communicates with the inlet and through which the introduced gas flows, and the shooter is accommodated within the gas passage.

[0049] The above case includes a first arc exhaust hole in the longitudinal direction that is perforated on one side of the bottom surface adjacent to the gas passage, and the cover includes a second arc exhaust hole that is perforated in the same manner as the first arc exhaust hole at a position corresponding to the first arc exhaust hole.

[0050] The above joining rib includes a second joining rib formed longitudinally on the inner side of the cover adjacent to the second arc discharge hole.

[0051] The above joining rib includes a tapered inclined portion that reduces the diameter; and a convexly rounded agglomeration portion disposed on the center side of the joining rib connected to the inclined portion, wherein the agglomeration portion enhances the agglomeration of ultrasonic energy during welding.

[0052] Preferably, the joining rib is formed of a thermoplastic material.

[0053] The above cover includes at least one fixed projection formed to protrude to a certain height, and the case includes a projection insertion hole into which the fixed projection is inserted.

[0054] In addition, the above-mentioned fixed projection is positioned so as to be spaced apart from the ultrasonically welded joint rib without contact.

[0055] To solve the above problem, the method for manufacturing an aptrip device of the present invention comprises: a housing assembly step for assembling a housing; and an ultrasonic welding step for ultrasonically welding the housing.

[0056] According to one example related to the present invention, the housing assembly step comprises an internal assembly process for assembling a shooter and an elastic member to a case; and a cover assembly process for covering the case with a cover.

[0057] In addition, the ultrasonic welding step comprises: an ultrasonic transmission process for transmitting high-frequency vibrations to the housing; a melting process in which the high-frequency vibrations are transmitted to a joining rib, causing the joining rib and the cover contact surface to melt; and a cooling process in which the ultrasonic waves are stopped, causing the melted joining rib and the cover contact surface to cool, thereby completing the welding of the housing.

[0058] The pressure trip device and the method of manufacturing the same according to the present invention differ from conventional technology in that the case and cover maintain a tightly sealed state without opening even under high arc pressure, thereby preventing the external leakage of arc pressure and flying debris.

[0059] The present invention has the advantage of improving the reliability of the trip device return operation.

[0060] The present invention differs from conventional technology in that it applies a non-contact bonding method to a case and a cover using ultrasound.

[0061] The present invention has the effect of ensuring high productivity by completing welding within a few seconds.

[0062] The present invention has an economic advantage in that welding is implemented without the use of additional adhesive materials, thereby reducing costs.

[0063] FIG. 1 is a first exploded perspective view illustrating the configuration of a conventional pressure trip device.

[0064] FIG. 2 is a second exploded perspective view illustrating the configuration of a conventional aptrip device.

[0065] FIG. 3 is an exploded perspective view showing the detailed configuration of the wiring circuit breaker of the present invention.

[0066] FIG. 4 is a front view showing the configuration of the wiring circuit breaker of the present invention.

[0067] FIG. 5 is a cross-sectional view showing the detailed configuration of the single-pole blocking part and the arc extinguishing part of the present invention.

[0068] FIG. 6 is a perspective view illustrating the configuration of an aptrip device according to the present invention.

[0069] FIG. 7 is a first exploded perspective view illustrating the detailed configuration of an aptrip device according to the present invention.

[0070] FIG. 8 is a second exploded perspective view illustrating the detailed configuration of an aptrip device according to the present invention.

[0071] FIG. 9 is a perspective view illustrating the case of an aptrip device.

[0072] FIG. 10 is a perspective view illustrating the cover of the aptrip device.

[0073] FIG. 11 is a cross-sectional view of an aptrip device according to the present invention.

[0074] Figure 12 (a) is a first state diagram showing the pre-welding state of the joining rib and the ultrasonic welding surface.

[0075] Figure 12 (b) is a second state diagram showing the post-welding state of the joint rib and the ultrasonic welding surface.

[0076] FIG. 13 is a cross-sectional view of a joining rib according to the present invention.

[0077] FIG. 14 is a diagram illustrating the usage state of a shooter according to the present invention.

[0078] FIG. 15 is a block diagram illustrating the configuration of a method for manufacturing an aptrip device according to the present invention.

[0079] Figure 16 is a block diagram illustrating the configuration of the housing assembly step.

[0080] Figure 17 is a block diagram illustrating the configuration of the ultrasonic welding step.

[0081] Hereinafter, the pressure trip device (100) and the method of manufacturing the same related to the present invention will be described in more detail with reference to the drawings.

[0082] In this specification, identical or similar reference numbers are assigned to identical or similar configurations even for different embodiments, and redundant descriptions thereof are omitted.

[0083] In addition, even if the embodiments are different, as long as there is no structural or functional contradiction, a structure applied to one embodiment can be applied identically to another embodiment.

[0084] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0085] In describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description is omitted.

[0086] The attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that all modifications, equivalents, and substitutions included within the concept and technical scope of the present invention are included.

[0087] FIG. 3 is a perspective view showing the detailed configuration of a circuit breaker, FIG. 4 is a front view showing the configuration of a circuit breaker, and FIG. 5 is a cross-sectional view showing the detailed configuration of a single-pole breaking section and an arc extinguishing section.

[0088] The trip device (100) according to the present invention is a device that performs a trip operation by being operated by a means for detecting when an overcurrent is passed through a circuit breaker (1).

[0089] The trip device (100) is a component of a wiring circuit breaker (1) that operates the switching mechanism (300) to the trip position when a fault current occurs.

[0090] Hereinafter, a circuit breaker (1) for wiring according to the present invention will be described with reference to FIGS. 3 to 5.

[0091] A wiring circuit breaker (1) can allow or block the energization between an external power source and a load. To this end, the wiring circuit breaker (1) is connected to an external power source and a load so as to be energized.

[0092] When a current higher than the rated current is supplied, the fixed contact (411) and the movable contact (421) (see FIG. 5) of the circuit breaker (1) may be separated from each other. This process is called the tripping process. At this time, the external power source and the load are not supplied with current to each other, so that damage to the power source or the load due to overcurrent can be prevented.

[0093] Referring to FIGS. 3 to 5, a wiring circuit breaker (1) according to one embodiment includes an enclosure (200), a switching mechanism (300), a single-pole blocking part (400), an arc extinguishing part (500), and a pressure trip device (100).

[0094] The enclosure (200) forms the exterior of the circuit breaker (1). Accordingly, a space is formed inside the enclosure (200). Each component provided for the operation of the circuit breaker (1) can be accommodated in the space. Specifically, the space accommodates a single-pole blocking section (400) and an arc extinguishing section (500) (see FIG. 5). Additionally, the opening / closing mechanism section (300) and the pressure trip device (100) can be rotatably coupled to the enclosure (200).

[0095] The outer casing (200) is formed in the shape of a box.

[0096] The enclosure (200) may include any coupling means (not shown) so that the aptrip device (100) is mounted on one side of the outer surface of the enclosure. In the illustrated embodiment, the aptrip device (100) is mounted on the front (left side in the drawing) side of the enclosure (200).

[0097] Although not shown, the outer casing (200) may have a gas hole (not shown) formed through one side.

[0098] A gas hole (not shown) connects the internal space of the outer casing (200) with the external space of the outer casing (200). Multiple gas holes (not shown) are formed penetratingly on one surface of a plurality of outer casings (200) facing each other.

[0099] When the opening / closing mechanism (300) and the pressure trip device (100) are operated, the single-pole blocking unit (400) housed in the internal space of the enclosure (200) rotates, generating an arc and gas. The generated arc passes through the arc extinguishing unit (500) and is extinguished, after which it can flow into the external space of the enclosure (200) through a gas hole (not shown). (See FIG. 5)

[0100] Although not shown, the outer casing (200) includes a base casing (not shown) in the shape of a casing in which an opening / closing mechanism (300) is accommodated inside, and an outer casing cover (not shown) that opens and closes the open upper surface of the base casing (not shown).

[0101] That is, the outer casing (200) is composed of a base box (not shown) with an open top surface and an outer casing cover (not shown) that opens and closes the top surface of the base box (not shown).

[0102] The base box (not shown) accommodates each component provided inside for the operation of the wiring circuit breaker (1).

[0103] The opening and closing mechanism (300) is positioned adjacent to the single-pole blocking part (400) and is configured to contact or separate the movable contact (420) from the fixed contact (410).

[0104] The switching mechanism (300) operates together with the tripping device (100) when an overcurrent is transmitted, thereby interrupting the transmission between the wiring circuit breaker (1) and an external power source or load.

[0105] Accordingly, the opening and closing mechanism (300) is connected to the pressure trip device (100).

[0106] When the pressure trip device (100) is rotated and operated, the opening and closing mechanism (300) can also be rotated.

[0107] Additionally, the switching mechanism (300) is also connected to the single-pole blocking part (400). When the switching mechanism (300) is rotated and operated, the movable contact (421) can be separated from the fixed contact (411). Accordingly, the wiring circuit breaker (1) is electrically separated from an external power source or load.

[0108] During the operation of the opening and closing mechanism (300), the arc generated in the internal space of the outer casing (200) passes through the arc extinguishing part (500), is extinguished, and then discharged to the outside through the gas hole of the outer casing (200).

[0109] Referring to FIGS. 3 to 5, the opening and closing mechanism (300) includes a nail (310) and a lever (320).

[0110] The nail (310) is rotatably coupled to the outer casing (200) and is configured to perform a trip operation.

[0111] The nail (310) can be rotated by the aptrip device (100) in a direction toward the pedal (not shown) or in a direction opposite to the pedal (not shown).

[0112] When normal current is being supplied, the nail (310) restrains the pedal (not shown). At this time, the pedal (not shown) is prevented from rotating arbitrarily by the restraint of the nail (310).

[0113] As the nail (310) rotates, the pedal (not shown) is released from the nail (310) and rotates, and the handle (321) connected to the pedal (not shown) also rotates. Through the above process, if an overcurrent is passed through the circuit breaker (1), the power supply between the external power source and the load can be cut off.

[0114] Additionally, if the nail (310) is rotated in the opposite direction of the above process, the pedal (not shown) is again constrained to the nail (310) and can be returned to the initial state together with the handle (321).

[0115] The nail (310) can be formed from a high-rigidity material. For example, the nail (310) can be formed from a metal material. This is to prevent the nail (310) from being physically damaged when the pedal (not shown) is pressed or when the pressure trip device (100) is pressed.

[0116] The lever (320) is rotatably coupled to the enclosure (200) in a direction toward the nail (310) or in a direction opposite to the nail (310).

[0117] The lever (320) performs the operation of returning the tripping device (100) that performs the tripping operation to its initial state.

[0118] Specifically, the lever (320) is a device for the user to manually perform a tripping operation of the wiring circuit breaker (1) when an overcurrent occurs. The lever (320) is rotated by an external force to allow or block current flow between the wiring circuit breaker (1) and an external power source and load.

[0119] That is, when the aptrip device (100) strikes the nail (310), the nail (310) rotates and the pedal (not shown) is released. At this time, as the released pedal (not shown) rotates, the lever (320) rotates together with the pedal (not shown), allowing the user to easily recognize the status of the wiring circuit breaker (1) from the outside.

[0120] Additionally, in the above state, when the lever (320) is pressed again and rotated, it returns to the initial state before the trip operation is performed.

[0121] The lever (320) is partially exposed on the outside of the enclosure (200). The user can easily recognize the operating status of the wiring circuit breaker (1) through the exposed portion of the lever (320).

[0122] Additionally, the user can determine whether the wiring circuit breaker (1) is operated through the lever (320). That is, the user can operate the lever (320) to adjust the state of the wiring circuit breaker (1) to "ON," "OFF," or "TRIP," etc.

[0123] In the illustrated embodiment, the lever (320) includes a handle (321), a handle cam (322), and a handle coupling member (323).

[0124] The handle (321) has the shape of a handle, with the external shape of the lever (320).

[0125] The handle (321) is rotatably coupled to the outer casing (200) with respect to the handle coupling member (323). Additionally, the handle (321) is rotatably connected relative to the handle coupling member (323).

[0126] The handle (321) can be rotated toward the nail (310) or in a direction opposite to the nail (310).

[0127] A portion of the handle (321) is exposed to the outside of the enclosure (200). Therefore, the user can easily operate the circuit breaker (1) by gripping the handle (321) and pressing it toward the front side (left side in the drawing) or the rear side (right side in the drawing).

[0128] The handle (321) is formed to have an arc-shaped cross-section having a predetermined curvature.

[0129] The handle cam (322) is a plate-shaped configuration extending downward from both sides of the handle (321).

[0130] The handle cam (322) can generate rotational movement in the handle (321) that is spaced apart from the handle coupling member (323).

[0131] The handle cam (322) is positioned between the handle coupling member (323) and the handle (321), and is coupled to the handle coupling member (323) and the handle (321), respectively. In the illustrated embodiment, the handle (321) is positioned on the upper side of the handle cam (322), and the handle coupling member (323) is positioned on the lower side. That is, the handle (321), the handle cam (322), and the handle coupling member (323) are arranged sequentially from the upper side to the lower side.

[0132] The handle cam (322) is coupled to the handle (321) so that it rotates together with the handle (321) when rotated.

[0133] The handle cam (322) is formed in the shape of a curved plate.

[0134] The handle coupling member (323) is inserted into the handle cam (322) and serves as the central axis of the rotating handle (321) and handle cam (322).

[0135] Accordingly, the handle coupling member (323) is positioned on the lower side of the handle cam (322).

[0136] Additionally, the handle coupling member (323) is coupled through the outer casing (200). In summary, the handle coupling member (323) serves as the rotation axis of the handle cam (322).

[0137] Referring to FIGS. 4 and 5, the single-pole blocking part (400) is located inside the enclosure (200) and is equipped with a fixed contact (410) and a movable contact (420).

[0138] The single-pole blocking unit (400) allows or blocks current flow between the wiring circuit breaker (1) and an external power source or load. The current flow is achieved by the contact between the fixed contact (410) and the movable contact (420).

[0139] Additionally, the above blocking is achieved by separating the fixed contact (410) and the movable contact (420).

[0140] The single-pole blocking unit (400) is accommodated in the internal space of the outer casing (200).

[0141] The single-pole blocking section (400) is positioned adjacent to the arc extinguishing section (500).

[0142] The single-pole blocking unit (400) is connected to an external power source and load so as to be electrically connected.

[0143] Additionally, the single-pole blocking section (400) is connected to the switching mechanism section (300). When the switching mechanism section (300) is operated, the single-pole blocking section (400) is also operated, thereby blocking the current flow between the wiring circuit breaker (1) and an external power source or load.

[0144] The single-pole blocking portion (400) can be formed from a conductive material. For example, the single-pole blocking portion (400) can be formed from copper (Cu), silver (Ag), etc.

[0145] In the embodiment illustrated in FIGS. 4 and 5, the single-pole blocking unit (400) includes a fixed contact (410), a movable contact (420), and a rotating shaft (430).

[0146] The fixed contact (410) and the movable contact (420) are in contact with or separated from each other to allow or block the current flow of the wiring circuit breaker (1). The contact or separation can be achieved by rotating the rotating shaft (430).

[0147] The fixed contact (410) is connected to an external power source or load so as to be electrically connected.

[0148] Through the fixed contact (410), the wiring circuit breaker (1) can be connected to an external power source or load so as to be electrically connected.

[0149] A portion of the fixed contact (410) is accommodated in the internal space of the enclosure (200).

[0150] At this time, the fixed contact (410) does not move within the internal space of the enclosure (200). Therefore, contact and separation between the fixed contact (410) and the movable contact (420) are achieved by the movement of the movable contact (420).

[0151] The fixed contacts (410) may be provided in multiple numbers. In the illustrated embodiment, two fixed contacts (410) are provided and are located on the front and rear sides of the enclosure (200), respectively. Additionally, in the above embodiment, the two fixed contacts (410) are point-symmetric with respect to the center axis of the rotating shaft (430).

[0152] A plurality of fixed contacts (410) can be electrically connected to each other. The connection is formed by a plurality of movable contacts (420) each contacting a plurality of fixed contacts (410).

[0153] A fixed contact (410) is positioned adjacent to the arc extinguishing section (500). In the embodiment illustrated in FIG. 5, the fixed contact (410) positioned on the front side (left side in the drawing) is located above the arc extinguishing section (500). Additionally, the fixed contact (410) positioned on the rear side (right side in the drawing) is located below the arc extinguishing section (500).

[0154] In the illustrated embodiment, the fixed contact (410) includes a fixed contact (411) and a fixed contact plate (412).

[0155] The fixed contact (411) is in contact with or separated from the movable contact (421). Accordingly, the wiring circuit breaker (1) can be connected to or disconnected from an external power source or load.

[0156] The fixed contact (411) is electrically connected to the fixed contact base (412). The fixed contact (411) is positioned adjacent to the fixed contact base (412).

[0157] The fixed contact plate (412) is connected to an external power source or load so as to be electrically connected.

[0158] The fixed contact plate (412) is electrically connected to the fixed contact (411).

[0159] In the illustrated embodiment, the fixed contact (411) positioned on the front side (left side in the drawing) is located on the lower side of the fixed contact plate (412), and the fixed contact (411) positioned on the rear side (right side in the drawing) is located on the upper side of the fixed contact plate (412).

[0160] The movable contact (420) is electrically connected to or disconnected from the fixed contact (410). Through the movable contact (420), a plurality of fixed contacts (410) can be electrically connected to each other. As a result, the wiring circuit breaker (1) can be electrically connected to an external power source or load.

[0161] The movable contact (420) is accommodated in the internal space of the enclosure (200). The movable contact (420) is movably coupled to the internal space of the enclosure (200).

[0162] The movable contact (420) is coupled with the rotating shaft (430). When the rotating shaft (430) is rotated, the movable contact (420) can also be rotated together with the rotating shaft (430).

[0163] The movable contact (420) is electrically connected to the rotating shaft (430). Thus, current flowing through the fixed contact (410) can be transmitted to the movable contact (420) and the rotating shaft (430).

[0164] Multiple movable contacts (420) may be provided. In the illustrated embodiment, the wiring circuit breaker (1) is provided with two movable contacts (420), each located on the front and rear sides of the enclosure (200). Additionally, in the above embodiment, the two movable contacts (420) are arranged point-symmetrically with respect to the central axis of the rotating shaft (430).

[0165] A plurality of movable contacts (420) can each be electrically connected to or separated from a plurality of fixed contacts (410).

[0166] That is, the movable contactor (420) can be rotated to come into contact with the fixed contactor (410) or rotated to be separated from the fixed contactor (410). The contact and separation can be achieved by the rotation of the rotating shaft (430) to which the movable contactor (420) is connected.

[0167] The movable contactor (420) is positioned adjacent to the arc extinguishing section (500).

[0168] In the illustrated embodiment, the movable contact (420) positioned on the front side (left side in the drawing) is positioned adjacent to the arc extinguishing part (500) below the fixed contact (410), and the movable contact (420) positioned on the rear side (right side in the drawing) is positioned adjacent to the arc extinguishing part (500) above the fixed contact (410).

[0169] In the above embodiment, the movable contact (420) may be separated from the fixed contact (410) as the rotating shaft (430) rotates counterclockwise. Conversely, when the rotating shaft (430) rotates clockwise, the movable contact (420) may come into contact with the fixed contact (410).

[0170] In the illustrated embodiment, the movable contact (420) includes a movable contact (421) and a movable contact plate (422).

[0171] The movable contact (421) is in contact with or separated from the fixed contact (411). Accordingly, the wiring circuit breaker (1) can be connected to or disconnected from an external power source or load.

[0172] The movable contact (421) is electrically connected to the movable contact base (422). The movable contact (421) is positioned adjacent to the movable contact base (422).

[0173] The movable contact member (422) is electrically connected to the rotating shaft (430).

[0174] When the rotating shaft (430) is rotated, the movable contact member (422) can also be rotated. Accordingly, the movable contact member (422) can be rotated in a direction toward the fixed contact (410) or in a direction opposite to the fixed contact (410).

[0175] In the illustrated embodiment, a plurality of movable contact members (422) are provided and connected to the front and rear sides of the rotating shaft (430), respectively. The movable contact member (422) positioned on the front side is electrically connected to or separated from the fixed contact member (410) located on the front side. The movable contact member (422) positioned on the rear side is electrically connected to or separated from the fixed contact member (410) located on the rear side.

[0176] The movable contact plate (422) is electrically connected to the movable contact (421).

[0177] In the illustrated embodiment, the movable contact (421) positioned on the front side is located on the upper side of the movable contact plate (422), and the movable contact (421) positioned on the rear side is located on the lower side of the movable contact plate (422).

[0178] In one embodiment, the movable contact (421) may be formed integrally with the movable contact base (422).

[0179] Hereinafter, the pressure trip device (100) according to the present invention will be described.

[0180] FIG. 6 is a perspective view illustrating the configuration of an ap-trip device according to the present invention, FIG. 7 is a first exploded perspective view illustrating the detailed configuration of an ap-trip device according to the present invention, and FIG. 8 is a second exploded perspective view illustrating the detailed configuration of an ap-trip device according to the present invention.

[0181] The trip device (100) is configured to provide a shooter (120) that provides force for triggering the switching mechanism (300), thereby operating the switching mechanism (300) to the trip position when a fault current occurs.

[0182] That is, the trip device (100) is operated by a means of detecting the overcurrent when an overcurrent is passed through the wiring circuit breaker (1) to perform a trip operation.

[0183] In one embodiment, the pressure trip device (100) is coupled to one side of the front outer surface of the enclosure (200). (See FIG. 3)

[0184] The pressure trip device (100) includes a housing (110), a shooter (120), and an elastic member (130) as shown in FIGS. 6 to 8.

[0185] The housing (110) is the configuration of the outer casing of the pressure trip device (100) having an inlet (112c) on one side.

[0186] The housing (110) has a roughly rectangular box shape. The housing (110) can be formed from a synthetic resin.

[0187] In one embodiment, the housing (110) is composed of a case (111) having an internal space and a cover (112) that seals the case (111).

[0188] FIG. 9 is a perspective view illustrating the case of an aptrip device.

[0189] Referring to FIG. 9, the case (111) is a housing shape with one side open and an internal space.

[0190] The internal space of the case (111) accommodates the shooter (120) and the elastic member (130).

[0191] One open side of the case (111) is sealed with a cover (112).

[0192] In one embodiment, the case (111) is ultrasonically welded to the cover (112). Accordingly, the cover contact surface (111c) is positioned around the inner edge (111d) of the case (111), and the cover contact surface (111c) is in contact with and welded to the joining rib (112a) of the cover (112) to be described later.

[0193] Referring to FIG. 9, the cover contact surface (111c) may be formed horizontally at a predetermined lower position from the rim (111d). In this case, the case (111) has a rim (111d) that protrudes to a predetermined degree. The cover (112) is seated and welded to the cover contact surface (111c) positioned on the inner side of the rim (111d).

[0194] Meanwhile, the cover contact surface (111c) may be formed on the edge (111d) of the case (111), although not illustrated. In this case, the cover (112) is welded in contact with the cover contact surface forming the edge (111d).

[0195] In one embodiment, the case (111) includes a projection insertion hole (111a) and a gas passage (111b).

[0196] The projection insertion hole (111a) is a through hole into which the fixing projection (112b) (see FIG. 7) is inserted.

[0197] The projection insertion hole (111a) is a through hole into which a plurality of fixing projections (112b) formed in the cover (112) are inserted.

[0198] The projection insertion hole (111a) allows the cover (112) and the case (111) to be fixed without detachment or disarray when assembled. That is, the fixing projection (112b) and the projection insertion hole (111a) prevent the cover (112) covering one side of the case (111) from becoming misaligned or detached due to vibrations generated during ultrasonic welding.

[0199] The projection insertion hole (111a) and the fixing projection (112b) serve to hold the position of the case (111) and the cover (112) during ultrasonic welding.

[0200] The projection insertion hole (111a) and the fixing projection (112b) are not configured for joining the case (111) and the cover (112), that is, for joining by a press-fit method.

[0201] The projection insertion hole (111a) has a size and shape into which a fixed projection (112b) can be inserted.

[0202] In addition, the projection insertion hole (111a) may be a groove or a hole.

[0203] The gas passage (111b) is a space where gas introduced into the housing (110) flows.

[0204] The gas passage (111b) is connected to the inlet (112c).

[0205] The gas passage (111b) is formed as a groove in the vertical direction.

[0206] The case (111) according to the present invention may further include a first arc discharge hole (111e).

[0207] The first arc discharge hole (111e) is a longitudinal through hole formed on one side of the bottom surface of the case (111) adjacent to the gas passage (111b).

[0208] The first arc exhaust hole (111e) is formed with the same shape at a position corresponding to the second arc exhaust hole (112d) of the cover (112) to be described later.

[0209] The first arc discharge hole (111e) is a through hole for discharging arc pressure introduced into the pressure trip device (100).

[0210] The first arc exhaust port (111e) is positioned adjacent to the gas path (111b).

[0211] The arc introduced into the housing (110) rotates the shooter (120) with high arc pressure and is then discharged from the housing (110) through the first arc discharge port (111e).

[0212] That is, an arc is discharged through the first arc discharge hole (111e) and the second arc discharge hole (112d) that are perforated in the case (111) and cover (112) of the housing (110).

[0213] FIG. 10 is a perspective view showing the cover of the ap-trip device, FIG. 11 is a cross-sectional view of the ap-trip device according to the present invention, FIG. 12(a) is a first state diagram showing the state before welding of the joining rib and the ultrasonic welding surface, and FIG. 12(b) is a second state diagram showing the state after welding of the joining rib and the ultrasonic welding surface.

[0214] The cover (112) is configured to seal one side of the case (111). That is, the cover (112) is formed in a plate shape.

[0215] As an example, the cover (112) is configured to seal one side of the open of the case (111) and includes a joining rib (112a) and a fixing projection (112b) as shown in FIG. 10.

[0216] Referring to FIG. 10, the joining rib (112a) is a longitudinal projection formed along the edge of the cover (112). The joining rib (112a) is in contact with the case (111).

[0217] Referring to FIG. 12(a) and FIG. 12(b), the joining rib (112a) is in contact with the cover contact surface (111c) of the case (111) and ultrasonically welded. That is, the joining rib (112a) is configured for ultrasonically welding the case (111) and the cover (112).

[0218] The joining rib (112a) is in contact with the cover contact surface (111c) of the case (111) and is melted by receiving high-frequency vibrations of ultrasound, and then cooled. During this process, the joining rib (112a) is fused with the case (111).

[0219] The joining rib (112a) is made of a thermoplastic material.

[0220] The joining rib (112a) is formed in the longitudinal direction surrounding the edge of the cover (112) so that a complete seal between the case (111) and the cover (112) can be achieved.

[0221] Accordingly, the joining rib (112a) can be formed around the entire perimeter of the cover (112) that contacts the case (111).

[0222] In one embodiment, the joining rib (112a) includes a first joining rib (1121) and a second joining rib (1122).

[0223] The first joining rib (1121) is arranged longitudinally along the perimeter of the edge of the cover (112).

[0224] The first joining rib (1121) is formed around the entire perimeter of the cover (112), excluding the rotational operating section of the shooter (120), as shown in FIG. 10.

[0225] The second joining rib (1122) is formed longitudinally on the inner side of the cover (112) adjacent to the second arc discharge hole (112d).

[0226] That is, the second joining rib (1122) is positioned adjacent to the second arc exhaust hole (112d) so that the inner side of the housing (110) adjacent to the first arc exhaust hole (111e) and the second arc exhaust hole (112d) can be sealed without opening from the high-pressure arc introduced into the gas passage (111b).

[0227] The second joining rib (1122) is positioned on the inner side of the cover (112).

[0228] Specifically, the second joining rib (1122) may be formed as a pair facing each other arranged along the second arc discharge hole (112d).

[0229] Meanwhile, the joining rib (112a) is positioned to contact a predetermined inner position at the edge of the cover contact surface (111c).

[0230] This is to ensure that when the joining rib (112a) melts and spreads during ultrasonic welding, the spread range of the joining rib (112a) does not extend beyond the edge of the cover contact surface (111c).

[0231] As an example, the joining rib (112a) is in contact with the edge of the cover contact surface (111c) 0.7 mm inward.

[0232] In addition, when ultrasonically welding, the molten joint rib (112a) must not come into contact with the internal components inside the housing (110). This is to prevent the internal components that come into contact with the molten joint rib (112a) from melting and fusing together with the joint rib (112a).

[0233] Accordingly, the fixing projection (112b) formed protruding from the cover (112) is positioned so as to be spaced apart from the joining rib (112a) by a certain distance. That is, it may be preferable for the fixing projection (112b) to be positioned at a distance such that it does not come into contact with the molten and spread joining rib (112a).

[0234] FIG. 13 is a cross-sectional view of a joining rib according to the present invention.

[0235] Referring to FIG. 13, in one embodiment, the joining rib (112a) is formed with an inclined portion (1123) and a cohesive portion (1124).

[0236] The inclined portion (1123) is the inclined side of the joining rib (112a).

[0237] The inclined portion (1123) has a tapered shape so that its diameter decreases upward.

[0238] The angle of inclination of the inclined section (1123) can be applied in various ways.

[0239] That is, although the slope is not shown, it may be formed at an angle of inclination of 90°.

[0240] The aggregation portion (1124) is positioned at the center of the joining rib (112a) connected to the inclined portion (1123) and has a convex, rounded shape.

[0241] The aggregation portion (1124) is formed so that the center of the joining rib (112a) protrudes convexly.

[0242] The aggregation part (1124) strengthens the aggregation of ultrasonic energy during welding, thereby increasing the efficiency of the welding.

[0243] The slope of the curved surface of the aggregation part (1124) is not limited to the illustrated embodiment and can be applied in various ways.

[0244] Additionally, the aggregation part (1124) may be shaped like a cone with a pointed center or a polygonal pyramid, although it is not shown.

[0245] Although the aggregation part in the shape of a cone or a polygonal pyramid has the advantage of significantly improving ultrasonic aggregation compared to the aggregation part (1124) in the shape of a convex round, it has the limitation that it is difficult to implement in injection molding.

[0246] The fixed projection (112b) is at least one projection formed to protrude to a certain height.

[0247] A fixed projection (112b) is formed protruding from the inner surface of the cover (112) facing the case (111).

[0248] The fixed projection (112b) is inserted into the projection insertion hole (111a) of the case (111).

[0249] The fixing projection (112b) ensures that the cover (112) and the case (111) can be fixed without detachment or misalignment when assembled. That is, the fixing projection (112b) and the projection insertion hole (111a) perform the function of fixing the cover (112) covering one side of the case (111) so that it does not become misaligned or detached due to vibrations generated during ultrasonic welding.

[0250] The fixed projection (112b) has a size and shape that can be inserted into the projection insertion hole (111a).

[0251] The fixed projection (112b) is positioned so as to be spaced apart from the ultrasonically welded joint rib (112a) without contact.

[0252] Specifically, the fixed projection (112b) maintains a spacing such that it does not come into contact with the molten and spread joint rib (112a). This is to prevent the fixed projection (112b) from coming into contact with the molten joint rib (112a) and fusing to the joint rib (112a).

[0253] The cover (112) according to the present invention may further include a second arc discharge hole (112d).

[0254] The second arc exhaust hole (112d) is formed at a position corresponding to the first arc exhaust hole (111e).

[0255] The second arc exhaust hole (112d) has the same shape as the first arc exhaust hole (111e).

[0256] The second arc exhaust hole (112d) is a longitudinal through hole formed on one side of the cover (112) adjacent to the gas passage (111b).

[0257] The second arc discharge port (112d) discharges the arc pressure that has entered the pressure trip device (100).

[0258] The arc introduced into the housing (110) rotates the shooter (120) with high arc pressure and is then discharged from the housing (110) through the first arc discharge port (111e) and the second arc discharge port (112d).

[0259] The second arc discharge hole (112d) has a second joining rib (1122) placed around it.

[0260] FIG. 14 is a diagram illustrating the usage state of a shooter according to the present invention.

[0261] Referring to FIG. 14, the shooter (120) is installed longitudinally inside the housing (110) such that a certain upper portion is exposed to the outside. The shooter (120) is configured to move in one direction by gas introduced into the housing (110).

[0262] That is, the shooter (120) is configured to transmit rotational motion to the opening / closing mechanism (300) when the trip device (100) performs a trip operation (see FIG. 4).

[0263] Referring to FIGS. 4 and FIGS. 14, the shooter (120) presses the nail (310). When an overcurrent is passed through the circuit breaker (1), the shooter (120) presses the nail (310), and the opening / closing mechanism (300), including the handle (321), rotates so that the user can easily recognize the circuit breaker (1).

[0264] Conversely, if the handle (321) is pressed back to its initial state by an external force, the shooter (120) that was pressing the nail (310) can return to its initial state. Accordingly, the nail (310) also returns to its initial state.

[0265] Therefore, the shooter (120) is positioned adjacent to the nail (310).

[0266] The shooter (120) is coupled to the housing (110) so as to be movable in a direction toward the nail (310) or in a direction opposite to the nail (310).

[0267] When the shooter (120) moves toward the nail (310), it comes into contact with the nail (310) and presses the nail (310). The movement of the shooter (120) ends when the shooter (120) comes into close contact with the inner surface of the housing (110).

[0268] The shooter (120) is formed in any shape capable of pressing the nail (310).

[0269] The elastic member (130) is configured such that one side is supported by the housing (110) and the other side contacts one side of the shooter (120) to elastically support the shooter (120).

[0270] The elastic member (130) is an elastic spring positioned on one side of the shooter (120).

[0271] The elastic member (130) is configured such that both ends are connected to the inner surface of the shooter (120) and the housing (110), thereby providing a restoring force to the moving shooter (120).

[0272] That is, the elastic member (130) is accommodated in the internal space of the housing (110).

[0273] The elastic member (130) is provided in the form of a coil spring.

[0274] The elastic member (130) can be any known one having the same effect as a coil spring without limitation.

[0275] The elastic member (130) can be provided in any form that stores restoring force through compression and tension and can provide the stored restoring force to other members.

[0276] Hereinafter, a method for manufacturing an aptrip device according to the present invention will be described.

[0277] FIG. 15 is a block diagram illustrating the configuration of a method for manufacturing an aptrip device according to the present invention, FIG. 16 is a block diagram illustrating the configuration of a housing assembly step, and FIG. 17 is a block diagram illustrating the configuration of an ultrasonic welding step.

[0278] The method for manufacturing an aptrip device according to the present invention applies a non-contact welding method using ultrasound.

[0279] The aptrip device (100) is configured to transmit ultrasonic waves to a housing (110) in which a case (111) and a cover (112) are assembled, so that the contact surfaces of the case (111) and the cover (112) are melted and cooled by high-frequency vibrations and welded. Accordingly, the aptrip device (100) is configured so that the housing (110) does not open even under high arc pressure.

[0280] That is, the pressure trip device (100) according to the present invention has the advantage of achieving complete sealing through ultrasonic welding.

[0281] As an example, a method for manufacturing an aptrip device includes a housing assembly step (S100) and an ultrasonic welding step (S200) as shown in FIG. 14.

[0282] The housing assembly step (S100) is a step of assembling the housing (110).

[0283] Referring to FIG. 16, the housing assembly step (S100) includes an internal assembly process (S110) for assembling a shooter (120) and an elastic member (130) inside a case (111), and a cover assembly process (S120) for covering the case (111) with a cover (112). (See FIG. 7 and FIG. 8)

[0284] The cover assembly process (S120) is a process of inserting the fixing projection (112b) of the cover (112) into the projection insertion hole (111a) of the case (111).

[0285] The ultrasonic welding step (S200) is a step of ultrasonically welding the assembled housing (110).

[0286] Referring to FIG. 17, the ultrasonic welding step (S200) includes an ultrasonic transmission process (S210), a melting process (S220), and a cooling process (S230).

[0287] The ultrasonic transmission process (S210) is a process of transmitting high-frequency vibrations to the housing (110).

[0288] Specifically, the ultrasonic transmission process (S210) is a process in which high-frequency vibrations are generated in an ultrasonic generator (not shown), an ultrasonic transducer (not shown) converts the high-frequency vibrations into mechanical energy, and transmits this to an aptrip device (100).

[0289] The melting process (S220) is a process in which high-frequency vibration is transmitted to the joining rib (112a) of the cover (112), and the joining rib (112a) and the cover contact surface (111c) of the case (111) are melted.

[0290] When high-frequency vibration is transmitted to the contact portion of the aptrip device (100), the joining rib (112a) and the cover contact surface (111c), heat is generated due to friction, causing the contact portion to melt. The melted portion is joined, and this process is performed in the melting process (S220).

[0291] The cooling process (S230) is a process of cooling the molten joint rib (112a) and cover contact surface (111c) by stopping the ultrasonic waves. When the cooling process (S230) is performed, the welding of the housing (110) is completed. That is, the joint rib (112a) and cover contact surface (111c) joined in the melting process (S220) are cooled in the cooling process (S230) to be completely joined, and the welding of the housing (110) is completed.

[0292] In one embodiment, the manufacturing method of the aptrip device applies a non-contact joining method that joins the case (111) and the cover (112) using ultrasound, thereby ensuring strong joining force and completely preventing the leakage of arc and flying debris. As a result, the operational reliability of the aptrip device (100) is improved.

[0293] In addition, the manufacturing method of the aptrip device ensures high productivity as welding is completed within seconds, and also provides economic benefits such as cost reduction as welding is performed without the use of additional adhesive materials.

[0294] The pressure trip device and the method of manufacturing the same according to the present invention differ from conventional technology in that the case and cover maintain a tightly sealed state without opening even under high arc pressure, thereby preventing the external leakage of arc pressure and flying debris.

[0295] The present invention has the advantage of improving the reliability of the trip device return operation.

[0296] The present invention differs from conventional technology in that it applies a non-contact bonding method to a case and a cover using ultrasound.

[0297] The present invention has the effect of ensuring high productivity by completing welding within a few seconds.

[0298] The present invention has an economic advantage in that welding is implemented without the use of additional adhesive materials, thereby reducing costs.

[0299] The aptrip device (100) and the method of manufacturing the same described above are not limited to the configuration and method of the embodiments described above, and all or part of each embodiment may be selectively combined to allow for various modifications to be made.

[0300] It is obvious to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit and essential features of the invention. Accordingly, the foregoing detailed description should not be interpreted restrictively in all respects but should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

Claims

1. Housing having an inlet; A shooter positioned longitudinally inside the housing such that the upper side is exposed to the outside of the housing; and It includes an elastic member that contacts the shooter and elastically supports the shooter, and The above housing is an aptrip device joined by ultrasonic welding.

2. In Paragraph 1, The above housing is, A case having an open side and an internal space; and An aptrip device comprising a cover that seals one side of the above case.

3. In Paragraph 2, The above cover is, It includes a joining rib formed protruding along the perimeter of a cover in contact with the case and ultrasonically welded to the case, and The above case is, An aptrip device comprising a cover contact surface that contacts the above cover and where the joining rib is ultrasonically welded.

4. In Paragraph 3, The above joining rib is, A pressure trip device that contacts a predetermined inner position at the edge of the above cover contact surface.

5. In Paragraph 3, The above joining rib is, A pressure trip device comprising a first joining rib arranged longitudinally along the perimeter of the edge of the above cover.

6. In Paragraph 2, The above case is, It includes a gas passage that communicates with the above-mentioned inlet and through which the introduced gas flows, and The above shooter is, An overtrip device accommodated within the above gas path.

7. In Paragraph 6, The above case is, It includes a first arc exhaust hole in the longitudinal direction formed on one side of the bottom surface adjacent to the above gas passage, and The above cover is, A pressure trip device comprising a second arc exhaust hole formed in the same manner as the first arc exhaust hole at a position corresponding to the first arc exhaust hole.

8. In Paragraph 7, The above joining rib is, A pressure trip device comprising a second joining rib formed longitudinally on the inner side of a cover adjacent to the second arc discharge hole.

9. In Paragraph 3, The above joining rib is, A tapered inclined section so that the diameter decreases; and It includes an aggregate portion having a convex, rounded shape, positioned at the center of a joining rib connected to the above-mentioned inclined portion, The above aggregation part is an aptrip device that enhances the aggregation of ultrasonic energy during welding.

10. In Paragraph 3, The above joining rib is, An aptrip device formed of a thermoplastic material.

11. In Paragraph 3, The above cover is, It includes at least one fixed projection formed to protrude to a certain height, and The above case is, A pressure trip device comprising a projection insertion hole into which the above-mentioned fixed projection is inserted.

12. In Paragraph 11, The above fixed projection is, An aptrip device positioned to be spaced apart from the ultrasonically welded joint rib without contact.

13. In a method for manufacturing an aptrip device, Housing assembly step for assembling the housing; and A method for manufacturing an aptrip device, comprising an ultrasonic welding step of ultrasonically welding the above housing.

14. In Paragraph 13, The above housing assembly step is, An internal assembly process for assembling shooters and elastic members into a case; and A method for manufacturing an aptrip device, comprising a cover assembly process for covering the above case with a cover.

15. In Paragraph 13, The above ultrasonic welding step is, Ultrasonic transmission process for transmitting high-frequency vibrations to the above housing; A melting process in which the above high-frequency vibration is transmitted to the joining rib, and the joining rib and the cover contact surface are melted; and A method for manufacturing an aptrip device, comprising a cooling process in which the ultrasonic waves are stopped so that the molten joint rib and the cover contact surface are cooled and the welding of the housing is completed.

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