CN107961402B

CN107961402B - Negative pressure aspirator

Info

Publication number: CN107961402B
Application number: CN201711374054.4A
Authority: CN
Inventors: 岑道卷; 李桂新; 王军; 李桂存
Original assignee: Guangzhou Kehuize Biotechnology Co ltd
Current assignee: Guangzhou Kehuize Biotechnology Co ltd
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2024-04-26
Anticipated expiration: 2037-12-19
Also published as: CN107961402A

Abstract

The invention provides a negative pressure aspirator, which comprises a jacket, a piston, a core rod and a locking device, wherein the jacket is cylindrical, a suction port is arranged at a first end of the jacket, the piston is arranged in the jacket and can be in reciprocating sealing fit with the jacket, the first end of the core rod stretches into the jacket and is connected with the piston, a second end of the core rod stretches out of the jacket, the locking device is movably arranged at a second end of the jacket, the locking device locks the core rod to move towards the first end of the jacket in a first state, and unlocks the core rod in a second state. The negative pressure aspirator provided by the embodiment of the invention is provided with the locking device, so that the locking of the core rod in the aspiration process can be realized, and the operation of workers can be suspended in the aspiration process without continuously applying tension, thus the assistance of other workers is not needed.

Description

Negative pressure aspirator

Technical Field

The invention relates to the field of medical appliances, in particular to a negative pressure aspirator.

Background

Medical syringes are often used for aspiration of medical fluids or body fluids in addition to injection applications during routine clinical treatment. Since cosmetic or breast reconstruction operations are increasingly performed, and autologous fat transplantation is a major trend of cosmetic operations, syringes are often used in cosmetic operations. Before fat transplantation, a clinician must extract living fat from other parts of the body of the operated person to be transplanted to the operation area to perform a local orthopedic effect. When the autologous fat of the operated person is extracted, the injector is connected with the coarse needle tube to pump the pretreated autologous fat, and the common injector is not provided with the locking control device, so that the liposuction doctor can only maintain the negative pressure pumping process of the injector by hand, the operator feels tired in the whole operation process, and when the extracted fat amount is large, two people can often rotate to operate, thereby wasting time and energy.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a labor-saving negative pressure aspirator.

The invention provides a negative pressure aspirator, which comprises a sleeve, a piston, a core rod and a locking device, wherein the sleeve is cylindrical, a suction port is arranged at a first end of the sleeve, the piston is arranged in the sleeve and can be in reciprocating sealing fit with the sleeve, the first end of the core rod extends into the sleeve and is connected with the piston, a second end of the core rod extends out of the sleeve, the locking device is movably arranged at a second end of the sleeve, the locking device locks the core rod to move towards the first end of the sleeve in a first state, and unlocks the core rod in a second state.

As a further improvement of the above embodiment, the second end of the outer sleeve is provided with a flange, the locking means comprises a locking ring hinged to the flange, the locking ring has a snap-on structure, which in a first state is snapped with the flange and in a second state is disengaged from the flange.

As a further improvement of the above embodiment, the snap-fit structure includes a wide C-shaped lip and a narrow C-shaped lip connected to each other, the narrow C-shaped lip being located on a side of the flange near the first end of the jacket and the wide C-shaped lip being located on a side of the flange remote from the first end of the jacket in a radial direction of the core bar, the lip of the wide C-shaped lip being closer to a central axis of the core bar than the lip of the narrow C-shaped lip in the first state.

As a further improvement of the above embodiment, the locking ring is provided with a stopper limiting the rotation angle of the locking ring.

As a further improvement of the above embodiment, the locking means includes a plug inserted from a side of the outer jacket toward a central axis of the outer jacket.

As a further improvement of the embodiment, a flange is arranged at the second end of the outer sleeve, a through hole is formed in the side wall, close to the flange, of the outer sleeve, and the bolt is inserted into the through hole.

As a further development of the above-described embodiment, the core rod is provided with a protruding locking plate, the locking means in the first state stopping against a side of the locking plate adjacent to the first end of the jacket.

As a further improvement of the above embodiment, the core pin is provided with a plurality of the lock plates at intervals along an axial direction thereof.

As a further improvement of the above embodiment, the core rod includes a rod core, the plurality of lock plates are connected to the rod core and are arranged in parallel, a plurality of reinforcing ribs are further arranged between two adjacent lock plates, the plurality of reinforcing ribs are connected to the side wall of the rod core and are arranged along the circumferential direction of the rod core at intervals, two ends of each reinforcing rib are connected to two adjacent lock plates, the width of the first end of each reinforcing rib is greater than that of the second end, and the width of each lock plate is greater than that of each reinforcing rib.

As a further improvement of the above embodiment, the locking plate is circular, the center of the circle is located on the central axis of the core rod, and the locking plate is perpendicular to the central axis of the core rod.

The negative pressure aspirator provided by the embodiment of the invention is provided with the locking device, so that the locking of the core rod in the aspiration process can be realized, and the operation of workers can be suspended in the aspiration process without continuously applying tension, thus the assistance of other workers is not needed.

Drawings

FIG. 1 is a schematic diagram showing a locking state structure of a negative pressure aspirator according to an embodiment of the present invention;

FIG. 2 is a schematic view showing an unlocked state of the negative pressure aspirator according to the embodiment of the present invention;

FIG. 3 is a top view of a negative pressure aspirator provided by an embodiment of the present invention;

fig. 4 is a cross-sectional view taken along line N-N of fig. 3.

Detailed Description

The following further details of the described technical solution of the present invention are described in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art may better understand the present invention and practice it, but the examples are not meant to limit the invention.

Referring to fig. 1 to 4, an embodiment of the present invention provides a negative pressure aspirator, which includes an outer sleeve 1, a piston 2, a core rod 4 and a locking device 3. The casing 1 has a substantially cylindrical shape, a suction opening 11 is provided at a first end of the casing 1, the suction opening 11 being provided in a protruding manner for sucking air or other substances, and a second end of the casing 1 has an opening. The piston 2 is arranged in the outer sleeve 1 and is in sealing fit with the outer sleeve 1 in a reciprocating manner, so that suction is realized. The first end of the core rod 4 extends into the outer sleeve 1 and is connected with the piston 2 to drive the piston 2 to reciprocate in the outer sleeve 1. The second end of the core rod 4 extends out of the outer sleeve 1, and a hand 5 is arranged at the end part of the second end of the core rod 4, so that the operation of a user is facilitated. The locking device 3 is movably arranged at the second end of the outer sleeve 1, the locking device 3 locks the core rod 4 to move towards the first end of the outer sleeve 1 in the first state, and unlocks the core rod 4 in the second state.

Referring to fig. 1, in the first state, the locking device 3 locks the core rod 4, and the core rod 4 cannot move toward the first end of the jacket 1 but can move toward the second end of the jacket 1. Referring to fig. 2, in the second state, the locking device 3 moves to the unlocking position relative to the outer sleeve 1, and the core rod 4 is no longer locked, and at this time, the core rod 4 can reciprocate relative to the outer sleeve 1 to perform suction. When the operator needs to rest halfway due to long-time suction, the locking device 3 is moved to the locking position, and then the core rod 4 is released, so that the core rod 4 cannot be retracted to the second end of the outer sleeve 1 due to negative pressure. After the rest, when the suction can be continued, the locking device 3 is moved to the unlocking position, and the core rod 4 can be continuously drawn.

In a preferred embodiment, the second end of the sleeve 1 is provided with a flange 12, which flange 12 may be integrally formed with the main body portion of the sleeve 1. The locking device 3 comprises a locking ring which is hinged to the flange 12 by means of a hinge shaft 31. The locking ring has a snap-in structure, which in a first state is snapped with the flange 12, fixed to the flange 12, and locks the core rod 4, and in a second state, the locking ring is rotated relative to the flange 12 to an unlocked position, disengaged from the flange 12.

Referring to fig. 2, in a further preferred embodiment, the snap-fit structure includes a wide C-shaped lip 32 and a narrow C-shaped lip 33 that are interconnected. The wide C-shaped lip 32 and the narrow C-shaped lip 33 are spaced apart from each other in the height direction, thereby forming a catching groove between the wide C-shaped lip 32 and the narrow C-shaped lip 33. Referring to fig. 4, in the first state, the narrow C-shaped lip 33 is located on the side of the flange 12 near the first end of the jacket 1, and the wide C-shaped lip 32 is located on the side of the flange 12 away from the first end of the jacket 1, thereby trapping the flange 12 between the wide C-shaped lip 32 and the narrow C-shaped lip 33. The lip of the wide C-shaped lip 32 is closer to the central axis of the core pin 4 than the lip of the narrow C-shaped lip 33 in the radial direction of the core pin 4, thus closing off a portion of the opening at the second end of the jacket 1, thereby locking the core pin 4.

Referring to fig. 2, in a further preferred embodiment, the locking ring is provided with a stop 34 limiting the angle of rotation of the locking ring. When the locking ring is rotated at an angle relative to the flange 12, the stop 34 abuts the sidewall of the flange 12, thereby preventing the locking ring from continuing to rotate.

In another preferred embodiment, the locking means comprises a bolt (not shown) inserted from the side of the casing 1 towards the central axis of the casing 1. The bolts can be n-type bolts or plate type bolts, and the side wall 13 of the outer sleeve 1 can be provided with through holes. In the first state, the bolt passes through the through hole and stretches into the outer sleeve 1 to lock the core rod 4. In the second state, the latch is moved outwardly to unlock the core pin 4, thereby allowing the core pin 4 to freely reciprocate within the jacket 1.

In a further preferred embodiment, the second end of the sleeve 1 is provided with a flange 12, and the side wall 13 of the sleeve 1 adjacent to the flange 12 is provided with a through hole, into which the bolt is inserted. I.e. the latch is arranged next to the side of the flange 12 near the first end of the jacket 1. In other embodiments, the latch may be provided on the side of the flange 12 remote from the first end of the casing 1.

In a preferred embodiment, the core rod 4 is provided with a protruding locking plate 42, the locking means 3 in the first state stopping against the side of the locking plate 42 near the first end of the jacket 1, thereby locking the core rod 4. The lock plate 42 is sized to be approximately the same as the inner diameter of the outer sleeve 1. In a further preferred embodiment, the core rod 4 is provided with a plurality of locking plates 42 at intervals along the axial direction thereof, so that the core rod 4 can be locked at different positions, thereby facilitating the operation.

In a preferred embodiment, the core rod 4 includes a core 41, the core 41 is generally cylindrical, a plurality of lock plates 42 are connected to the core 41 and arranged in parallel, a plurality of reinforcing ribs 43 extending longitudinally along the core rod 4 are further disposed between two adjacent lock plates 42, and the plurality of reinforcing ribs 43 are connected to a sidewall of the core 41 and are arranged at intervals along the circumference of the core 41. The plurality of reinforcing ribs 43 are arranged radially about the core 41 in the cross section of the core rod 4. Two ends of the reinforcing rib plate 43 are connected with two adjacent lock plates 42 for reinforcing the strength of the core rod 4. The width of the first end of the stiffener plate 43 (i.e., the end proximate to the first end of the jacket 1) is greater than the width of the second end thereof (i.e., the end distal from the first end of the jacket 1), and the width of the lock plate 42 is greater than the width of the stiffener plate 43.

In a further preferred embodiment, the locking plate 42 is circular with a diameter approximately equal to the inner diameter of the jacket 1, the center of the locking plate 42 being located on the central axis of the core rod 4, and the locking plate 42 being perpendicular to the central axis of the core rod 4.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the invention.

Claims

1. The negative pressure aspirator is characterized by comprising a jacket, a piston, a core rod and a locking device, wherein the jacket is cylindrical, a suction port is arranged at a first end of the jacket, the piston is arranged in the jacket and can be in reciprocating sealing fit with the jacket, the first end of the core rod stretches into the jacket and is connected with the piston, a second end of the core rod stretches out of the jacket, the locking device is movably arranged at a second end of the jacket, the locking device locks the core rod to move towards the first end of the jacket in a first state, and unlocks the core rod in a second state;

the second end of the outer sleeve is provided with a flanging, the locking device comprises a locking ring, the locking ring is hinged to the flanging, the locking ring is provided with a clamping structure, the clamping structure is clamped with the flanging in a first state, and is separated from the flanging in a second state; the locking ring is provided with a stop part for limiting the rotation angle of the locking ring;

The clamping structure comprises a wide C-shaped lip and a narrow C-shaped lip which are connected with each other, in a first state, the narrow C-shaped lip is positioned on one side of the flanging close to the first end of the outer sleeve, the wide C-shaped lip is positioned on one side of the flanging far away from the first end of the outer sleeve, and in the radial direction of the core rod, the lip of the wide C-shaped lip is closer to the central axis of the core rod than the lip of the narrow C-shaped lip;

The core bar is provided with a protruding locking plate, and the locking device is stopped at one side of the locking plate, which is close to the first end of the outer sleeve, in a first state; the core rod is provided with a plurality of lock plates at intervals along the axial direction of the core rod; the locking plate is circular, the center of the circle is located on the central shaft of the core rod, and the locking plate is perpendicular to the central shaft of the core rod.

2. The negative pressure aspirator of claim 1, in which the core rod comprises a rod core, the lock plates are connected to the rod core and arranged in parallel, a plurality of reinforcing ribs are further arranged between two adjacent lock plates, the reinforcing ribs are connected to the side wall of the rod core and arranged at intervals along the circumferential direction of the rod core, two ends of the reinforcing ribs are connected to two adjacent lock plates, the width of the first end of the reinforcing rib is greater than the width of the second end of the reinforcing rib, and the width of the lock plates is greater than the width of the reinforcing rib.