CN109172885B - Simple and easy adjustable negative pressure treatment device - Google Patents
Simple and easy adjustable negative pressure treatment device Download PDFInfo
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- CN109172885B CN109172885B CN201811148186.XA CN201811148186A CN109172885B CN 109172885 B CN109172885 B CN 109172885B CN 201811148186 A CN201811148186 A CN 201811148186A CN 109172885 B CN109172885 B CN 109172885B
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- push rod
- fixing
- piston
- bulge
- rotating shaft
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/64—Containers with integrated suction means
- A61M1/67—Containers incorporating a piston-type member to create suction, e.g. syringes
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- A61M1/0023—
Abstract
The invention provides a simple adjustable negative pressure treatment device which comprises a barrel, wherein a cover body is integrally arranged at one end of the barrel, a first bulge is arranged on the cover body, and a hole communicated with the inner space of the barrel is formed in the first bulge; a sliding groove is axially formed in the inner wall of the cylinder body; a piston and a push rod are arranged in the cylinder body, the piston is close to one end of the cover body, one end of the push rod is connected with the piston, and the other end of the push rod extends out of one end, far away from the cover body, of the cylinder body; the push rod is provided with a second bulge matched with the sliding groove, and the second bulge can move along the sliding groove; the barrel is axially provided with a plurality of fixing grooves which are communicated with the sliding grooves and extend along the circumferential direction of the inner wall of the barrel. The simple adjustable negative pressure treatment device is simple in structure and convenient to operate; the cost is low, and the economic burden of patients can be reduced; the volume and the weight are lighter, and the fixing and the carrying are convenient.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a simple adjustable negative pressure treatment device.
Background
In clinical practice, negative pressure devices are often used, such as surgery or post-operative drainage, lavage to combat infection, to simulate the initiation of wound-induced repair mechanisms, and to increase blood flow over a range of pressures.
The existing negative pressure treatment device can mainly generate negative pressure and is matched with accessories (such as a negative pressure drainage tube) so as to achieve the purpose of utilizing the negative pressure to assist in treatment, and the existing negative pressure treatment device has the following defects:
1. the structure is complex and the operation is inconvenient;
2. the price is high, so that the use cost is high, and the use cost is added to the treatment cost of the patient, so that a large economic burden is caused to the patient;
3. the fixation and the carrying are inconvenient, and the volume and the weight are large and the fixation is inconvenient because the structure of the existing negative pressure treatment device is complex, and the carrying is not convenient.
Disclosure of Invention
The present invention provides a simple adjustable negative pressure therapy device to solve at least one of the above technical problems.
The technical scheme of the invention is as follows: a simple adjustable negative pressure treatment device comprises a cylinder body, wherein a cover body is integrally arranged at one end of the cylinder body, a first bulge is arranged on the cover body, and a hole communicated with the inner space of the cylinder body is formed in the first bulge; a sliding groove is axially formed in the inner wall of the cylinder body; a piston and a push rod are arranged in the cylinder body, the piston is close to one end of the cover body, one end of the push rod is connected with the piston, and the other end of the push rod extends out of one end of the cylinder body, which is far away from the cover body; the push rod is provided with a second bulge matched with the sliding groove, and the second bulge can move along the sliding groove; the barrel is axially provided with a plurality of fixing grooves which are communicated with the sliding grooves and extend along the circumferential direction of the inner wall of the barrel.
Optionally, a positioning groove matched with the second protrusion is arranged in the fixing groove, and the positioning groove is located on one side, close to the cover body, of the fixing groove.
Optionally, one end of the push rod, which is not connected to the piston, is provided with a first blocking portion.
Optionally, a second blocking portion and a third blocking portion are arranged at one end, far away from the cover body, of the outer wall of the barrel.
Optionally, the piston includes a piston body, and a first annular protrusion and a second annular protrusion integrally disposed with the piston body, the first annular protrusion is located at a front end of the second annular protrusion, a diameter of the first annular protrusion is smaller than a diameter of the second annular protrusion, a first hollow portion is circumferentially disposed at a position close to the first annular protrusion inside the piston body, a second hollow portion is circumferentially disposed at a position close to the second annular protrusion inside the piston body, a third annular protrusion is integrally disposed at a front end of the push rod, a top of the third annular protrusion is tapered, a bottom of the third annular protrusion is annular, a clamping hole matched with a front portion of the push rod is disposed at a middle position of the piston body, the piston body is fixed to the push rod through the clamping hole, and a third hollow portion is circumferentially disposed at a rear end of the third annular protrusion inside the piston body, the sum of the volumes of the third hollow part and the second hollow part is larger than the volume of the first hollow part, the third hollow part is positioned at the rear side of the second hollow part, and the first hollow part, the second hollow part and the third hollow part are communicated.
Optionally, the device further comprises a fixing device, wherein the fixing device comprises a first clamping part and a second clamping part; the first clamping part comprises a first fixing part and a first movable part, a strip-shaped hole is formed in the first fixing part, square grooves are formed in two ends of the back face of the strip-shaped hole, fixing holes are formed in positions, right opposite to the square grooves, of two ends of the front face of the strip-shaped hole, and the two fixing holes are communicated with the strip-shaped hole; a first rotating shaft is arranged on the strip-shaped hole, a square bulge is arranged on the back surface of the first rotating shaft, the square bulge can be clamped in the square groove, a pressure spring and a first torsion spring are arranged on the front surface of the first rotating shaft, the connecting position of the first torsion spring and the first rotating shaft is located at one end of the front surface of the first rotating shaft, and one end, which is not connected with the first rotating shaft, of the first torsion spring abuts against the first movable part; the first fixed part and the first movable part are provided with first arc-shaped concave parts which are matched with each other, and the surface of the first arc-shaped concave part is provided with a first anti-skid layer; the second clamping part comprises a second fixing part and a second movable part, the second fixing part and the first fixing part are integrated, a second rotating shaft is fixed on the second fixing part, the movable part is hinged to the fixing part through the second rotating shaft, one end, which is not connected with the second fixing part, of the second rotating shaft is connected with a second torsion spring, and one end, which is not connected with the second rotating shaft, of the second torsion spring abuts against the second movable part; and second arc-shaped concave parts which are matched with each other are arranged on the second fixed part and the second movable part, and a second anti-skid layer is arranged on the surface of each second arc-shaped concave part.
The application provides a simple and easy adjustable negative pressure treatment device, during the use with first protruding attach fitting (for example negative pressure drainage tube), fix the barrel, the pulling push rod can produce the negative pressure in the barrel, and then the form of clearing hole and the inside intercommunication of annex reaches the purpose that utilizes the negative pressure adjunctie therapy.
When the pulling push rod, when the second arch was located the fixed slot, can the rotary push rod, make the second arch be located the fixed slot to restriction push rod up-and-down motion, wherein, the protruding card of second is in different fixed slots, and the negative pressure in the barrel is different, through this kind of mode, can adjust the negative pressure value that the device produced, convenient to use.
The application provides a simple and easy adjustable negative pressure therapy device has following advantage for current negative pressure therapy device:
1. the structure is simple, and the operation is convenient;
2. the cost is low, and the economic burden of patients can be reduced;
3. the volume and the weight are light, and the fixing and the carrying are convenient;
additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a perspective view of a simple adjustable negative pressure therapy device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 3 is a schematic view of the cross-sectional structure B-B of FIG. 1;
FIG. 4 is one of the schematic longitudinal sectional views of FIG. 1;
FIG. 5 is a second schematic view of the cross-sectional structure B-B of FIG. 1;
FIG. 6 is a third schematic view of the cross-sectional structure B-B shown in FIG. 1;
FIG. 7 is a second schematic diagram of the longitudinal cross-sectional structure of FIG. 1;
FIG. 8 is a second schematic diagram of a perspective view of a simple adjustable negative pressure therapy device according to an embodiment of the present invention;
FIG. 9 is a schematic view of a push rod;
FIG. 10 is an exploded view of a piston and pushrod;
FIG. 11 is a front view of a fastening device;
fig. 12 is a schematic view of a back structure of a fixing device.
Wherein, the cylinder body 11; a chute 11-1; a fixing groove 11-2; positioning grooves 11-3; a second barrier 11-4; a third barrier 11-5; a lid 12; a first projection 13; hole 13-1; a piston 14; a piston body 14-1; a first annular projection 14-2; a second annular bulge 14-3; the first hollow portion 14-4; a second hollow portion 14-5; 14-6 of a clamping hole; the third hollow portion 14-7; a push rod 15; a second projection 15-1; a first barrier portion 15-2; a third annular projection 15-3; a first clamp 16 portion; a first fixed portion 16-1; strip-shaped holes 16-11; square grooves 16-12; a first movable portion 16-2, a fixing hole 16-13; a second clamping portion 17; a second fixed portion 17-1; a second movable portion 17-2; a first rotating shaft 18; square bulge 18-1; a pressure spring 18-2; a first torsion spring 18-3; a first arc-shaped recess 19; a first non-slip layer 19-1; a second rotating shaft 20; a second arc-shaped recess 21; a second non-slip layer 21-1; a second torsion spring 22.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Embodiments of the present invention provide a simple adjustable negative pressure therapy device, which, referring to figures 1-7,
the device comprises a cylinder body 11, wherein a cover body 12 is integrally arranged at one end of the cylinder body, a first bulge 13 is arranged on the cover body, the first bulge 13 can be generally cylindrical and is integrally formed with the cover body and the cylinder body, and a hole 13-1 communicated with the inner space of the cylinder body is arranged on the first bulge; the inner wall of the cylinder body is axially (namely, longitudinally in the figure 1) provided with a sliding groove 11-1; a piston 14 and a push rod 15 are arranged in the cylinder body, the piston is close to one end of the cover body, one end of the push rod is connected with the piston, and the other end of the push rod extends out of one end of the cylinder body, which is far away from the cover body; the push rod is provided with a second bulge 15-1 matched with the sliding groove, the second bulge can move along the sliding groove, the design is preferably in a mode that the second bulge is in sliding contact with the sliding groove, namely the inner wall of the sliding groove and the outer surface of the second bulge are designed to be smooth as far as possible, wherein the second bulge can also be a sliding block and is integrally formed or fixedly connected with the push rod; a plurality of fixing grooves 11-2 are axially formed in the barrel body, are communicated with the sliding grooves and extend along the circumferential direction of the inner wall of the barrel body, and in the application, the fixing grooves are preferably perpendicular to the sliding grooves; as a form of fixing, the shape of the fixing groove may also be provided as a section of a spiral, although if the fixing groove is provided as a section of a spiral, the second protrusion may also be shaped to match the fixing groove in the longitudinal direction.
The application provides a simple and easy adjustable negative pressure treatment device, during the use with first protruding attach fitting (for example negative pressure drainage tube), fix the barrel, the pulling push rod can produce the negative pressure in the barrel, and then the form of clearing hole and the inside intercommunication of annex reaches the purpose that utilizes the negative pressure adjunctie therapy.
When the pulling push rod, when the second arch was located the fixed slot, can the rotary push rod, make the second arch be located the fixed slot to restriction push rod up-and-down motion, wherein, the protruding card of second is in different fixed slots, and the negative pressure in the barrel is different, through this kind of mode, can adjust the negative pressure value that the device produced, convenient to use.
The application provides a simple and easy adjustable negative pressure therapy device has following advantage for current negative pressure therapy device:
1. the structure is simple, and the operation is convenient;
2. the cost is low, and the economic burden of patients can be reduced;
3. the volume and the weight are light, and the fixing and the carrying are convenient;
in one embodiment, referring to fig. 3 and 4, the fixing groove surrounds the inner wall of the cylinder body for one circle, and the structure is not limited by the rotation direction when the push rod is rotated.
In one embodiment, referring to fig. 4 and 5, the fixing groove surrounds a part of the inner wall of the cylinder, and the structure is such that when the push rod is rotated, the push rod is intelligently rotated counterclockwise, but when a plurality of second protrusions are arranged on the same plane, the adjacent second protrusions are not rotated too much to coincide with the sliding grooves of the second protrusions or get too close to the sliding grooves of the second protrusions.
In one embodiment, referring to fig. 6 and 7, a positioning groove 11-3 is disposed in the fixing groove and matches with the second protrusion (i.e., has the same size as the cross-sectional shape of the sliding groove), and the positioning groove is disposed on a side of the fixing groove close to the cover. Like this, when rotatory push rod, when the push rod was located the constant head tank, loosen the push rod, because the effect of the interior negative pressure of barrel makes the protruding card of second in the constant head tank, prevent that the push rod from breaking away from the fixed slot by the influence such as negative pressure, vibration. Can also set up in one side of constant head tank and block in this embodiment, face when rotatory push rod and block rotatoryly, loosen the push rod when the second arch is blockked promptly, more be favorable to people to judge that the push rod is rotatory to the constant head tank like this.
It should be noted that, in the present application, the second protrusions on the same plane may be provided in plural, preferably 2, and certainly the sliding grooves are also provided in plural, preferably 2, in the axial direction, the second protrusions may be provided in one row, or may be provided in plural rows, of course, the number of rows of the fixing grooves should be more than that of the second protrusions, otherwise, the purpose of adjusting the negative pressure cannot be achieved, and cannot exceed 3 rows in actual production, as shown in fig. 9, two rows of structures are provided, which are generally provided in one row, and as a medical device, for safety, the negative pressure in the cylinder may be set to 75-175mmHg, the negative pressure may be calculated according to the cross-sectional area of the internal space of the device and the extraction volume, or the adjustment range may be finally designed by measuring the relationship between the position of the piston and the generated by actual experiments, and a reasonable error range may be set, which is well known to those skilled in, in fig. 1 of the present application, the structure of dividing the negative pressure in the cylinder into three stages of 75, 125, and 175mmHg is a reasonable structure.
In one embodiment, referring to fig. 8, the end of the push rod not connected to the piston is provided with a first blocking portion 15-2, and the end of the outer wall of the barrel away from the cover is provided with a second blocking portion 11-4 and a third blocking portion 11-5, so that in use, the first blocking portion can prevent people from slipping when pulling the push rod, and the third blocking portion can be used for abutting fingers when pulling the push rod or being matched with the second blocking portion and clamped on a fixed object to prevent the barrel from moving along with the pulling of the push rod, and of course, the effect can also be achieved by abutting the second blocking portion with fingers.
In one embodiment, the piston and the push rod may be integrally provided, see fig. 8, such that the piston and the push rod do not disengage.
It should be noted that, in actual manufacturing, in order to facilitate installation of the push rod, the sliding groove is generally set to extend to an end of the cylinder body far away from the cover body as shown in fig. 1, that is, the bottom end in fig. 1, and regardless of the situation of facilitating installation of the push rod, the bottom end of the sliding groove may be set to be flush with the bottom end of the bottommost fixing groove, which can be derived by those skilled in the art according to this scheme.
In practical use, the magnitude of the friction force between the piston and the cylinder body determines the sensitivity performance when the piston is pulled, the smaller the friction force is, the better the sensitivity performance is, the easier the second bulge is rotated into the fixed groove, and the too small friction force between the piston and the cylinder body can cause the air leakage between the piston and the cylinder body, for this reason, the applicant has made a design as shown in fig. 10, the piston comprises a piston body 14-1 and a first annular bulge 14-2 and a second annular bulge 14-3 which are integrally arranged with the piston body, the first annular bulge is arranged at the front end of the second annular bulge, namely close to one end of the cover body, the diameter of the first annular bulge is slightly smaller than that of the second annular bulge, a first hollow part 14-4 is circumferentially arranged in the piston body at a position close to the first annular bulge, a second hollow part 14-5 is circumferentially arranged in the piston body at a position close to the second annular bulge, a third annular bulge 15-3 is integrally arranged at the front end of the push rod, the top of the third annular bulge is conical, the bottom of the third annular bulge is annular or cylindrical, a clamping hole 14-6 matched with the front part of the push rod is arranged in the middle of the piston body, the piston body is sleeved on the front part of the push rod through the clamping hole and is fixed with the push rod, a third hollow part 14-7 is circumferentially arranged in the piston body at the rear end of the third annular bulge, the first hollow part, the second hollow part and the third hollow part can exist in a hole form, the sum of the volumes of the third hollow part and the second hollow part is larger than the volume of the first hollow part, and the third hollow part is arranged at the rear side of the second hollow part, the first hollow portion, the second hollow portion and the third hollow portion are communicated. In this example. The clamping hole is actually a hole and is named mainly by the function of sheathing and clamping the push rod through elastic contraction of the clamping hole.
In the structure, when the piston is fixed in position in use, the piston is in a static state, the first annular bulge is in contact with the inner wall of the cylinder, the contact surface of the piston and the inner wall of the cylinder is minimum, when the piston is pulled, the second annular bulge is deformed upwards by friction force, the second hollow part is pressed to deform the second hollow part, and gas in the second hollow part flows to the first hollow part. The first hollow part is expanded, the first annular protrusion is expanded outwards and is in contact with the inner wall of the cylinder, the contact area between the piston body and the inner wall of the cylinder is increased, the situation that the sealing is poor due to the deformation of the first annular protrusion in the process of pulling the piston is prevented, meanwhile, under the situation of pulling the piston, the third annular protrusion extrudes the third hollow part to deform the third hollow part, the gas compensation gas compression volume of the third hollow part is reduced, and the situation that the first annular protrusion is not deformed enough and the sealing performance is not enough due to the reduction of the gas compression volume is prevented. Through this structure automatically regulated, can improve the sensitivity when pulling the piston under the circumstances of guaranteeing the leakproofness.
In actual use, the cylinder is generally fixed on a rack, and because the thickness of the rods for manufacturing the rack is different when the cylinder is applied to different occasions, a device for applying the rods with different thicknesses is needed to fix the cylinder, and for the convenience of fixing, the applicant also provides a fixing device for fixing the cylinder, which comprises a first clamping part 16 and a second clamping part 17, and is shown in fig. 11 and 12; the first clamping part comprises a first fixed part 16-1 and a first movable part 16-2, a strip-shaped hole 16-11 is formed in the first fixed part, square grooves 16-12 are formed in two ends of the back face of the strip-shaped hole, fixed holes 16-13 are formed in positions, right opposite to the square grooves, of two ends of the front face of the strip-shaped hole, and the two fixed holes are communicated with the strip-shaped hole; a first rotating shaft 18 is arranged on the strip-shaped hole, a square protrusion 18-1 is arranged on the back surface of the first rotating shaft, the square protrusion can be clamped in the square groove, a pressure spring 18-2 and a first torsion spring 18-3 are arranged on the front surface of the first rotating shaft, the connecting position of the first torsion spring and the first rotating shaft is located at one end of the front surface of the first rotating shaft, and one end, which is not connected with the first rotating shaft, of the first torsion spring abuts against the first movable part; the first fixed part and the first movable part are provided with first arc-shaped concave parts 19 which are matched with each other, and the surfaces of the first arc-shaped concave parts are provided with first anti-skid layers 19-1; the second clamping part comprises a second fixing part 17-1 and a second movable part 17-2, the second fixing part and the first fixing part are integrated, a second rotating shaft 20 is fixed on the second fixing part, the movable part is hinged to the fixing part through a second rotating shaft, one end, which is not connected with the second fixing part, of the second rotating shaft is connected with a second torsion spring 22, and one end, which is not connected with the second rotating shaft, of the second torsion spring abuts against the second movable part; the second fixed part and the second movable part are provided with second arc-shaped concave parts 21 which are matched with each other, and the surfaces of the second arc-shaped concave parts are provided with second anti-skid layers 21-1.
When the structure is used, the first clamping part is used for clamping a frame, specifically, a first activity is pulled to enable the first clamping part to be opened relative to the first fixing part, then the two first arc-shaped concave parts are sleeved on the rods of the frame, the two first arc-shaped concave parts are closed under the action force of the first torsion spring after hands are loosened to clamp the rods of the frame, the structure is suitable for both a cross rod and a vertical rod, when the cross rod is clamped, the first arc-shaped concave parts on the first movable part exist in a hook mode and bear the weight except the barrel body and the first movable part, the first fixing part is matched with the first arc-shaped concave parts of the first movable part to form a locking effect under the action of the first torsion spring, and the first movable part is further prevented from sliding off on the constant rod; when the vertical rod is clamped, the first fixed part is matched with the first arc-shaped concave part of the first movable part, the effect of locking is formed under the effect of the first torsion spring, the first clamping part is prevented from sliding downwards along the vertical rod, and in addition, the first clamping part is easy to incline under the action of the gravity of the second clamping part, so that a transverse component force is generated at the contact position of the first anti-slip layer and the vertical rod, and the first clamping part is further prevented from sliding downwards;
in addition, the opening size of the first movable part relative to the first fixed part can be further adjusted by adjusting the position of the first rotating shaft, the clamping connection of rods with different thicknesses is further adapted, specifically, the first rotating shaft is pressed to enable the square bulge on the back of the first rotating shaft to be separated from the square groove, so that the first rotating shaft can be pushed and pulled at two ends of the strip-shaped hole and located in any one fixed groove at two ends, the square bulge can be clamped in the corresponding square groove after the hands are loosened, and the square bulge cannot be separated from the square groove under the action of the pressure spring;
during the use, the second clamping part is used for the centre gripping barrel, and is concrete, pulls the second activity, makes its second fixed part relative open, then overlaps two second arc concave parts on the barrel, and two second arc concave parts draw close under the effort of second torsional spring behind the loose hand and block the barrel.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A simple adjustable negative pressure treatment device, which is characterized by comprising a cylinder body (11),
a cover body (12) is integrally arranged at one end of the cylinder body, a first bulge (13) is arranged on the cover body, and a hole (13-1) communicated with the inner space of the cylinder body is arranged on the first bulge;
a sliding groove (11-1) is axially arranged on the inner wall of the cylinder body;
a piston (14) and a push rod (15) are arranged in the cylinder body, the piston is close to one end of the cover body, one end of the push rod is connected with the piston, and the other end of the push rod extends out of one end of the cylinder body, which is far away from the cover body;
the push rod is provided with a second bulge (15-1) matched with the sliding groove, and the second bulge can move along the sliding groove;
a plurality of fixing grooves (11-2) are axially formed in the barrel body, are communicated with the sliding grooves and circumferentially extend along the inner wall of the barrel body;
also comprises a fixing device which is used for fixing the device,
the fixing device comprises a first clamping part (16) and a second clamping part (17);
the first clamping part comprises a first fixing part (16-1) and a first movable part (16-2), a strip-shaped hole (16-11) is formed in the first fixing part, square grooves (16-12) are formed in two ends of the back face of the strip-shaped hole, fixing holes (16-13) are formed in positions, right opposite to the square grooves, of two ends of the front face of the strip-shaped hole, and the two fixing holes are communicated with the strip-shaped hole;
a first rotating shaft (18) is arranged on the strip-shaped hole, a square protrusion (18-1) is arranged on the back surface of the first rotating shaft, the square protrusion can be clamped in the square groove, a pressure spring (18-2) and a first torsion spring (18-3) are arranged on the front surface of the first rotating shaft, the connecting position of the first torsion spring and the first rotating shaft is located at one end of the front surface of the first rotating shaft, and one end, which is not connected with the first rotating shaft, of the first torsion spring abuts against the first movable part;
the first fixed part and the first movable part are provided with first arc-shaped concave parts (19) which are matched with each other, and the surfaces of the first arc-shaped concave parts are provided with first anti-skid layers (19-1);
the second clamping part comprises a second fixing part (17-1) and a second movable part (17-2), the second fixing part and the first fixing part are integrated, a second rotating shaft (20) is fixed on the second fixing part, the movable part is hinged to the fixing part through the second rotating shaft, one end, which is not connected with the second fixing part, of the second rotating shaft is connected with a second torsion spring (22), and one end, which is not connected with the second rotating shaft, of the second torsion spring abuts against the second movable part;
and second arc-shaped concave parts (21) which are matched with each other are arranged on the second fixed part and the second movable part, and a second anti-skid layer (21-1) is arranged on the surfaces of the second arc-shaped concave parts.
2. The simple adjustable negative pressure therapy device according to claim 1, characterized in that a positioning groove (11-3) is disposed in the fixing groove and matches with the second protrusion, and the positioning groove is disposed on a side of the fixing groove close to the cover body.
3. The simple adjustable negative pressure therapy device according to claim 1, characterized in that the end of the push rod not connected to the piston is provided with a first blocking part (15-2).
4. The simple adjustable negative pressure therapy device according to claim 3, characterized in that a second blocking part (11-4) and a third blocking part (11-5) are arranged on the outer wall of the barrel body at the end far away from the cover body.
5. The simple adjustable negative pressure therapy device according to any one of claims 1-4,
the piston comprises a piston body (14-1), and a first annular bulge (14-2) and a second annular bulge (14-3) which are integrally arranged with the piston body, wherein the first annular bulge is positioned at the front end of the second annular bulge, the diameter of the first annular bulge is smaller than that of the second annular bulge, a first hollow part (14-4) is circumferentially arranged at a position close to the first annular bulge in the piston body, a second hollow part (14-5) is circumferentially arranged at a position close to the second annular bulge in the piston body, a third annular bulge (15-3) is integrally arranged at the front end of the push rod, the top of the third annular bulge is conical, the bottom of the third annular bulge is annular, and a clamping hole (14-6) matched with the front part of the push rod is arranged at the middle position of the piston body, the piston body is sleeved on the front portion of the push rod through a clamping hole and fixed with the push rod, a third hollow portion (14-7) is arranged in the piston body and located at the rear end of the third annular protrusion in the circumferential direction, the sum of the volumes of the third hollow portion and the second hollow portion is larger than the volume of the first hollow portion, the third hollow portion is located on the rear side of the second hollow portion, and the first hollow portion, the second hollow portion and the third hollow portion are communicated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811148186.XA CN109172885B (en) | 2018-09-29 | 2018-09-29 | Simple and easy adjustable negative pressure treatment device |
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|---|---|---|---|
| CN201811148186.XA CN109172885B (en) | 2018-09-29 | 2018-09-29 | Simple and easy adjustable negative pressure treatment device |
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| CN109172885A CN109172885A (en) | 2019-01-11 |
| CN109172885B true CN109172885B (en) | 2020-11-20 |
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