CN219200757U - Air tightness detection device of needle seat - Google Patents

Abstract

The utility model relates to the field of medical instruments and discloses an air tightness detection device of a needle seat, wherein the needle seat comprises a through hole arranged at the head part and a joint arranged at the tail part, the through hole is communicated with the joint, and the air tightness detection device comprises a detection plate, a detection frame, a sealing jig and a detection instrument; the detection plate is provided with a placement position for placing the needle seat, the head of the needle seat is abutted against the detection plate and the through hole is blocked by the detection plate when in detection, and the joint faces to the upper side; the detection frame is arranged on the detection plate; the sealing jig is arranged on the detection frame in a vertically movable manner and is positioned right above the placement position, a cavity which can be communicated with the inside of the needle seat is arranged in the sealing jig, and when in detection, the sealing jig is pressed on the joint to seal the needle seat; the detecting instrument is communicated with the cavity. The beneficial effects are that: the uncertainty factor brought by manual operation in the detection process is reduced, so that the time and quality of detecting the air tightness are more stable, the efficiency and quality of detecting the air tightness of the needle seat are improved, and the production quality of the puncture needle is also improved.

Description

Air tightness detection device of needle seat

Technical Field

The utility model relates to the field of medical instruments, in particular to an air tightness detection device of a needle seat.

Background

The puncture needle generally comprises a needle body and a needle seat, in the production process of the puncture needle, a sealing rubber cushion is firstly filled into a non-return valve sleeve, the non-return valve sleeve is assembled into the needle seat for ultrasonic welding, then the needle seat is subjected to air tightness detection, and finally the needle body and the needle seat can be assembled to finish the production of the puncture needle.

In the prior art, the air tightness of the detection needle seat is generally achieved by extracting negative pressure from the interior of the needle seat through a hand-held syringe of a worker, loosening the syringe after a few seconds, observing whether the needle seat has rebound, and judging whether the rebound is qualified or not, and otherwise, failing. However, the air tightness detection method has the problem of lower efficiency, and affects the production efficiency of the puncture needle; furthermore, the air tightness of the needle seat is detected by holding the injector by a worker, even if slight leakage exists, the air tightness of the needle seat is difficult to detect, the duration of negative pressure extraction is difficult to ensure, the quality of the produced puncture needle is not stable enough, even patients can be possibly affected, and serious medical accidents are caused.

Disclosure of Invention

The utility model mainly aims to provide an air tightness detection device of a needle seat, and aims to solve the technical problems of low air tightness detection efficiency and low detection quality of the needle seat in the prior art.

In order to achieve the above purpose, the utility model provides an air tightness detection device of a needle seat, wherein the needle seat comprises a through hole arranged at the head part and a joint arranged at the tail part, the through hole is communicated with the joint, and the air tightness detection device comprises a detection plate, a detection frame, a sealing jig and a detection instrument; the detection plate is provided with a placement position for placing the needle seat, the head of the needle seat is abutted against the detection plate and the through hole is blocked by the detection plate when in detection, and the joint faces to the upper side; the detection frame is arranged on the detection plate; the sealing jig is arranged on the detection frame in a vertically movable manner and is positioned right above the placement position, a cavity which can be communicated with the inside of the needle seat is arranged in the sealing jig, and when in detection, the sealing jig is pressed on the joint to seal the needle seat; the detecting instrument is communicated with the cavity.

The beneficial effects of the utility model are as follows: during detection, the needle seat is placed on the placement position, the through hole at the head part of the needle seat is plugged by the detection plate, and the joint at the tail part of the needle seat faces to the upper side. Then, the sealing jig moves downwards and is pressed on the joint to seal the needle seat. Finally, the air in the needle seat is extracted by operating the detecting instrument, so that negative pressure is formed in the needle seat, and the parameters on the detecting instrument are observed for a period of time, so that whether the air tightness of the needle seat is qualified or not can be known. The air tightness detection device presets the placement position to fix the position of the needle seat, and a sealing jig capable of moving up and down is arranged to seal the needle seat, and finally the air tightness detection is carried out through a detection instrument. In the whole process, the staff only needs to put the needle seat on the placement position, the subsequent operation is completed through automatic equipment, the workload of the staff is reduced, uncertainty factors brought by manual operation in the detection process are reduced, the time and quality for detecting the air tightness are more stable, the efficiency and quality for detecting the air tightness of the needle seat are improved, and the production quality of the puncture needle is also improved.

Preferably, the air tightness detection device further comprises a jig driving device, wherein the jig driving device is arranged on the detection frame, and the output end of the jig driving device is connected with the sealing jig so as to drive the sealing jig to be close to or far away from the placement position. The jig driving device can improve the in-place speed of the sealing jig and improve the detection efficiency.

Preferably, the lower extreme undercut of sealed tool forms the recess of cup jointing that matches with the joint, cup joints recess and cavity intercommunication, cup joints the junction of recess and cavity and is formed with spacing level, and during the detection, the joint wears to locate in the recess of cup jointing and butt on spacing level. The socket groove is used for ensuring that the joint is accurately abutted with the sealing jig, and ensuring the detection quality.

Preferably, a sealing ring is arranged on the limiting step, and when in detection, the joint is abutted on the sealing ring and extrudes the sealing ring. The sealing ring is arranged to be favorable for improving the sealing effect, reducing the air leakage risk and improving the accuracy of air tightness detection.

Preferably, the side wall of the sealing jig is provided with a detection interface, the detection interface is communicated with the cavity, and the detection instrument is communicated with the detection interface. The detecting instrument is connected to the detecting interface, and is communicated with the inner space of the needle seat finally through the detecting interface and the cavity.

Preferably, the detection instrument is a negative pressure leak detector.

Preferably, the placing position is provided with a placing hole matched with the shape of the head part, the needle seat is inserted into the placing hole, the head part of the needle seat faces downwards during detection, the bottom of the placing hole is used for blocking the through hole, and the joint of the needle seat faces upwards.

Preferably, the bottom of placing the hole is equipped with sealed pad, and during the detection, the head butt is on sealed pad and extrusion sealed pad, sealed pad shutoff through-hole. The sealing gasket can improve the tightness of the through hole plugging, ensure the air tightness during detection and improve the detection accuracy.

Preferably, the detection plate is provided with a fixed mould, a movable mould and a movable mould driving device, the fixed mould is fixedly arranged on the detection plate, the movable mould is connected to the detection plate in a sliding way, and the output end of the movable mould driving device is connected with the movable mould so as to drive the movable mould to be close to or far from the fixed mould; the side of the fixed mould, which is close to the movable mould, is provided with a first groove, the side of the movable mould, which is close to the fixed mould, is provided with a second groove, the first groove is opposite to the second groove, and when the movable mould is close to and abutted against the fixed mould, the first groove and the second groove are enclosed to form a placing hole. The placing hole is formed by enclosing the first groove and the second groove, so that the needle seat can be placed and taken out conveniently.

Preferably, a material dropping groove is arranged at a position corresponding to the placing hole on the detection plate; the movable die is fixedly provided with a material stirring piece, and when the movable die is close to and abutted against the fixed die, the material stirring piece is positioned at one side of the placing hole far away from the movable die; when the movable die moves in a direction away from the fixed die, the material stirring piece stirs the needle seat from the first groove to the blanking groove. The setting of dialling material spare and fall silo, the cooperation is placed the form that the hole has first recess and second recess to constitute, makes things convenient for the needle file to carry out blanking collection after finishing detecting.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an air tightness detection device (detection instrument is not shown) in an embodiment of the present utility model;

FIG. 2 is a schematic view showing the structures of a fixed die and a movable die in the embodiment of the utility model;

fig. 3 is a schematic view of the structure of the needle holder according to the embodiment of the present utility model;

FIG. 4 is a schematic diagram of a sealing tool according to an embodiment of the present utility model;

fig. 5 is a schematic diagram of a connection structure between a sealing tool and a detecting instrument in an embodiment of the present utility model.

In the accompanying drawings: 1-detecting plate, 11-placing position, 12-blanking groove, 2-detecting frame, 3-jig driving device, 4-sealing jig, 41-detecting interface, 42-cavity, 43-sleeving groove, 44-limiting step, 5-fixed mold, 51-first groove, 52-supporting plate, 521-supporting hole, 522-sealing gasket, 6-movable mold, 61-second groove, 7-movable mold driving device, 8-needle seat, 81-head, 811-through hole, 82-joint and 9-detecting instrument.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In addition, if a directional instruction such as up, down, left, right, front, rear, etc. is referred to in the embodiment of the present utility model, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

As shown in fig. 1 to 5, a needle seat tightness detection device comprises a needle seat 8, wherein the needle seat 8 comprises a through hole 811 arranged at a head part 81 and a joint 82 arranged at a tail part, the through hole 811 is communicated with the joint 82, and the tightness detection device comprises a detection plate 1, a detection frame 2, a sealing jig 4 and a detection instrument 9; the detection plate 1 is provided with a placement position 11 for placing the needle seat 8, when in detection, the head 81 of the needle seat 8 is abutted against the detection plate 1, the through hole 811 is blocked by the detection plate 1, and the joint 82 faces to the upper side; the detection frame 2 is arranged on the detection plate 1; the sealing jig 4 is arranged on the detection frame 2 in a vertically movable manner and is positioned right above the placement position 11, a cavity 42 which can be communicated with the inside of the needle seat 8 is arranged in the sealing jig 4, and when in detection, the sealing jig 4 is pressed on the joint 82 to seal the needle seat 8; the detection instrument 9 communicates with the cavity 42.

In detection, the needle holder 8 is placed on the placement position 11, the through hole 811 of the head 81 of the needle holder 8 is blocked by the detection plate 1, and the joint 82 of the tail of the needle holder 8 faces upward. Subsequently, the sealing jig 4 moves downward and presses against the connector 82 to seal the needle holder 8. Finally, the air inside the needle seat 8 is extracted by operating the detecting instrument 9, so that negative pressure is formed inside the needle seat 8, and the parameters on the detecting instrument 9 are observed for a period of time, so that whether the air tightness of the needle seat 8 is qualified can be known. The air tightness detection device presets the placement position 11 to fix the position of the needle seat 8, and the sealing jig 4 capable of moving up and down is arranged to seal the needle seat 8, and finally the air tightness detection is carried out through the detection instrument 9. In the whole process, the staff only needs to put the needle seat 8 on the placement position 11, the subsequent operation is completed through automatic equipment, the work load of the staff is lightened, the uncertainty factor brought by manual operation in the detection process is reduced, the time and the quality for detecting the air tightness are more stable, the efficiency and the quality for detecting the air tightness of the needle seat 8 are improved, and the production quality of the puncture needle is also improved.

In some embodiments, referring to fig. 2, the air tightness detection device further includes a jig driving device 3, where the jig driving device 3 is disposed on the detection frame 2, and an output end of the jig driving device 3 is connected with the sealing jig 4 to drive the sealing jig 4 to approach or separate from the placement position 11. The jig driving device 3 can improve the in-place speed of the sealing jig 4 and improve the detection efficiency.

Specifically, the jig driving device 3 is a jig driving cylinder, the cylinder body of the jig driving cylinder is arranged on the upper side of the detection frame 2, and the piston rod of the jig driving cylinder faces to the lower side, namely to the placement position 11. The piston rod of the jig driving cylinder is fixedly connected with the sealing jig 4.

In other embodiments, the jig driving device 3 is a jig driving motor, and the jig driving motor controls the up-down position adjustment of the sealing jig 4 through a motion module such as a "gear-rack motion module" or a "screw motion module".

In some embodiments, referring to fig. 4, the lower end of the sealing tool 4 is recessed upward to form a socket groove 43 matched with the joint 82, the socket groove 43 is communicated with the cavity 42, a limiting step 44 is formed at the connection part of the socket groove 43 and the cavity 42, and the joint 82 is penetrated in the socket groove 43 and is abutted to the limiting step 44 during detection. The socket groove 43 is used for ensuring that the joint 82 is accurately abutted with the sealing jig 4, and ensuring the detection quality.

Specifically, the outer contour of the connector 82 of the needle holder 8 is cylindrical, and the shape of the socket groove 43 is also cylindrical. The sealing jig 4 is cylindrical as a whole, the cavity 42 is arranged on the upper side of the sleeving groove 43 and is communicated with the sleeving groove 43, and the cavity 42 is also cylindrical. During detection, the sealing jig 4 moves downwards, so that the sleeve joint groove 43 is sleeved on the joint 82, the limiting step 44 is pressed on the joint 82, meanwhile, the head 81 is pressed on the detection plate 1, the through hole 811 is better plugged, and air tightness is guaranteed. When the sealing jig 4 presses the needle holder 8 against the detection plate 1, the inside of the needle holder 8 communicates with the cavity 42 through the joint 82.

In some embodiments, the stop collar 44 is provided with a sealing ring, and the connector 82 abuts against the sealing ring and presses the sealing ring during testing. The sealing ring is arranged to be favorable for improving the sealing effect, reducing the air leakage risk and improving the accuracy of air tightness detection.

Specifically, the inner bore of the seal ring is in corresponding communication with the cavity 42. After the connector 82 is sleeved in the sleeve joint groove 43, the interface of the connector 82 is aligned with the inner hole of the sealing ring under the limit action of the inner wall of the sleeve joint groove 43, so that the inside of the needle seat 8 can be communicated with the cavity 42 through the connector 82.

In some embodiments, referring to fig. 4, the side wall of the sealing jig 4 is provided with a detection interface 41, the detection interface 41 is in communication with the cavity 42, and the detection instrument 9 is in communication with the detection interface 41. The detecting instrument 9 is connected to the detecting interface 41, and finally communicates with the inner space of the needle holder 8 through the detecting interface 41 and the cavity 42.

In some embodiments, referring to fig. 5, the detection apparatus 9 is a negative pressure leak detector.

Specifically, the negative pressure leak detector includes an air extraction assembly, a control assembly, and a display assembly. The air extraction assembly is communicated with the detection interface 41, and the control assembly is used for controlling the air extraction amount, the air extraction time, the holding time and the like of the air extraction assembly. During detection, the negative pressure leak detector extracts air in the needle seat 8 to form negative pressure in the needle seat 8, then the control component controls the extraction amount and the holding time, and if the air pressure parameter on the display component is not changed in the holding time, the phenomenon of air leakage in the needle seat 8 is not shown; if the air pressure parameter on the display assembly decreases, this indicates that there is an air leak in the needle hub 8.

In some embodiments, referring to fig. 1, the placement position 11 is provided with a placement hole matching the shape of the head 81, and the needle holder 8 is inserted into the placement hole, so that the head 81 of the needle holder 8 faces downward and the bottom of the placement hole blocks the through hole 811 when detecting, and the joint 82 of the needle holder 8 faces upward.

In some embodiments, referring to fig. 2, a gasket 522 is provided at the bottom of the placement hole, and when detecting, the head 81 abuts against the gasket 522 and presses the gasket 522, and the gasket 522 closes the through hole 811. The sealing gasket 522 can improve the tightness of the through hole 811 plugging, ensure the air tightness during detection and improve the detection accuracy.

In some embodiments, referring to fig. 1 and 2, a fixed mold 5, a movable mold 6 and a movable mold driving device 7 are arranged on the detection plate 1, the fixed mold 5 is fixedly arranged on the detection plate 1, the movable mold 6 is slidably connected to the detection plate 1, and an output end of the movable mold driving device 7 is connected with the movable mold 6 so as to drive the movable mold 6 to be close to or far from the fixed mold 5; the side of the fixed mould 5, which is close to the movable mould 6, is provided with a first groove 51, the side of the movable mould 6, which is close to the fixed mould 5, is provided with a second groove 61, the first groove 51 is opposite to the second groove 61, and when the movable mould 6 is close to and abutted against the fixed mould 5, the first groove 51 and the second groove 61 are enclosed to form a placing hole. The placement hole is formed by enclosing the first groove 51 and the second groove 61, so that the needle seat 8 can be placed and taken out conveniently.

Specifically, the movable mold driving device 7 is a movable mold driving cylinder, and the cylinder body of the movable mold driving cylinder is fixedly arranged on the detection plate 1, and the piston rod of the movable mold driving cylinder is fixedly connected with the movable mold 6 so as to drive the movable mold 6 to be close to or far from the fixed mold 5.

The detection plate 1 is provided with a guide rail, the movable die 6 is provided with a sliding block, and the sliding block is clamped on the guide rail and can slide along the guide rail.

In other embodiments, the movable mold driving device 7 may also use a movable mold driving motor to control the movable mold 6 to approach or separate from the fixed mold 5 through a motion module such as a "gear-rack motion module" or a "screw motion module".

In some embodiments, referring to fig. 1, a material dropping groove 12 is provided on the detection plate 1 at a position corresponding to the placement hole; the movable die 6 is fixedly provided with a material stirring piece, and when the movable die 6 is close to and abutted against the fixed die 5, the material stirring piece is positioned at one side of the placing hole far away from the movable die 6; when the movable die 6 moves away from the fixed die 5, the material-shifting member shifts the needle holder 8 from the first recess 51 to the blanking groove 12. The setting of dialling material spare and blanking groove 12, the cooperation is placed the hole and is had the form that first recess 51 and second recess 61 constitute, makes things convenient for the needle file 8 to carry out blanking collection after having detected.

Specifically, the detection plate 1 is provided with a hollow portion penetrating the detection plate 1 from top to bottom, and the hollow portion serves as a chute 12. The fixed die 5 is erected on the hollow portion, and both ends of the fixed die 5 are fixedly provided on the detection plate 1. The bottom of the fixed mould 5 is also fixedly provided with a bearing plate 52, the bearing plate 52 is provided with a concave bearing hole 521, the bearing hole 521 is arranged at the lower side of the first groove 51, a sealing pad 522 is also arranged in the bearing hole 521, when the movable mould 6 approaches and is abutted against the fixed mould 5, the bearing hole 521, the first groove 51 and the second groove 61 are enclosed to form a placing hole, the head 81 of the needle stand 8 is arranged in the placing hole, the top end of the head 81 is abutted against the sealing pad 522 in the bearing hole 521, and the through hole 811 in the head 81 is plugged.

Two material stirring connecting rods which are arranged side by side are fixedly arranged on the movable die 6, one end of each material stirring connecting rod is fixedly arranged on the movable die 6, and the other end extends towards the direction of the fixed die 5. The material stirring piece is in a strip shape, and two ends of the material stirring piece are respectively connected with one ends of the two material stirring connecting rods, which are close to the fixed mould 5. When the movable die 6 approaches and abuts against the fixed die 5, the material shifting piece is positioned at one side of the placing hole far away from the movable die 6; when the movable die 6 moves away from the fixed die 5, the material-shifting member shifts the needle holder 8 from the first recess 51 to the blanking groove 12.

In some embodiments, referring to fig. 1, a plurality of placement holes are formed in a test board 1, a plurality of sealing jigs 4 are formed in a test rack 2, and the plurality of sealing jigs 4 are in one-to-one correspondence with the plurality of placement holes.

Specifically, the fixed mold 5 is provided with a plurality of first grooves 51, and the movable mold 6 is provided with a plurality of second grooves 61, the plurality of first grooves 51 and the plurality of second grooves 61 being in one-to-one correspondence to constitute a plurality of placement holes.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. The utility model provides a gas tightness detection device of needle file, needle file (8) are including locating through-hole (811) of head (81) and locating joint (82) of afterbody, through-hole (811) with joint (82) intercommunication, its characterized in that includes:

a detection plate (1), wherein a placement position (11) for placing the needle seat (8) is arranged on the detection plate (1), the head (81) of the needle seat (8) is abutted against the detection plate (1) and the through hole (811) is blocked by the detection plate (1) during detection, and the joint (82) faces to the upper side;

the detection frame (2) is arranged on the detection plate (1);

the sealing jig (4) is arranged on the detection frame (2) in a vertically movable manner and is positioned right above the placement position (11), a cavity (42) which can be communicated with the inside of the needle seat (8) is arranged in the sealing jig (4), and the sealing jig (4) is pressed on the joint (82) to seal the needle seat (8) during detection;

-a detection instrument (9), said detection instrument (9) being in communication with said cavity (42).

2. The air tightness detection device of the needle holder according to claim 1, wherein: the device comprises a detection frame (2), and is characterized by further comprising a jig driving device (3), wherein the jig driving device (3) is arranged on the detection frame (2), and the output end of the jig driving device (3) is connected with the sealing jig (4) so as to drive the sealing jig (4) to be close to or far away from the placement position (11).

3. The air tightness detection device of the needle holder according to claim 1, wherein: the lower extreme of sealed tool (4) upwards sunken form with connect (82) matched cup joint recess (43), cup joint recess (43) with cavity (42) intercommunication, cup joint recess (43) with the junction of cavity (42) is formed with spacing level (44), during the detection, connect (82) wear to locate cup joint recess (43) in and the butt in on spacing level (44).

4. A device for detecting the air tightness of a needle holder according to claim 3, wherein: and a sealing ring is arranged on the limiting step (44), and the joint (82) is abutted against the sealing ring and extrudes the sealing ring during detection.

5. A device for detecting the air tightness of a needle holder according to claim 1 or 3, wherein: the side wall of the sealing jig (4) is provided with a detection interface (41), the detection interface (41) is communicated with the cavity (42), and the detection instrument (9) is communicated with the detection interface (41).

6. The air tightness detection device of the needle holder according to claim 1, wherein: the detecting instrument (9) is a negative pressure leak detector.

7. The air tightness detection device of the needle holder according to claim 1, wherein: the placement position (11) is provided with a placement hole matched with the head (81) in shape, and the needle seat (8) is inserted into the placement hole.

8. The air tightness detection device of the needle holder according to claim 7, wherein: and a sealing gasket (522) is arranged at the bottom of the placement hole, the head part (81) is abutted against the sealing gasket (522) and presses the sealing gasket (522) during detection, and the through hole (811) is blocked by the sealing gasket (522).

9. The air tightness detection device of the needle holder according to claim 7 or 8, wherein: the detection plate (1) is provided with a fixed mold (5), a movable mold (6) and a movable mold driving device (7), the fixed mold (5) is fixedly arranged on the detection plate (1), the movable mold (6) is connected to the detection plate (1) in a sliding manner, and the output end of the movable mold driving device (7) is connected with the movable mold (6) so as to drive the movable mold (6) to be close to or far away from the fixed mold (5);

the fixed die (5) is provided with a first groove (51) on one side close to the movable die (6), a second groove (61) is formed on one side of the movable die (6) close to the fixed die (5), the first groove (51) is opposite to the second groove (61), and when the movable die (6) is close to and abutted against the fixed die (5), the first groove (51) and the second groove (61) are enclosed to form the placing hole.

10. The air tightness detection device of the needle holder according to claim 9, wherein: a material dropping groove (12) is arranged at a position corresponding to the placing hole on the detection plate (1);

a material stirring piece is fixedly arranged on the movable die (6), and when the movable die (6) is close to and abutted against the fixed die (5), the material stirring piece is positioned at one side of the placing hole far away from the movable die (6); when the movable die (6) moves in a direction away from the fixed die (5), the material stirring piece stirs the needle seat (8) from the first groove (51) to the blanking groove (12).

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