Manual type negative pressure suction equipment

Abstract

A manual type negative pressure suction device comprises a seat body which is provided with a negative pressure cavity, an air inlet and an air outlet, the air inlet and the air outlet are communicated with the negative pressure cavity, and the air inlet and the air outlet are provided with a first one-way valve opened in the air inlet direction and a second one-way valve opened in the air exhaust direction respectively; the piston rod is movably matched with the negative pressure cavity in a sealed mode, and a plurality of scale marks are arranged on the outer side face of the piston rod; and the elastic device is located in the negative pressure cavity, the two ends of the elastic device abut against the piston rod and the seat body correspondingly, and the elastic device is used for controlling the piston rod to move in the opposite pressing direction.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a manual negative pressure suction device. Background Technology

[0002] Negative pressure wound therapy (NPWT) devices are used to treat wounds by applying negative pressure. They are widely used in burn surgery, plastic surgery, and trauma orthopedics. NPWT can effectively drain wound exudate, reduce edema, create a negative pressure environment that promotes blood circulation, and foster granulation tissue growth and wound healing. Severe or large wounds require hospitalization, while some minor wounds can be treated at home; therefore, portable and easy-to-use NPWT devices are necessary.

[0003] Currently, negative pressure suction devices used clinically for wound treatment include wall-mounted negative pressure suction devices, negative pressure wound therapy devices, and disposable negative pressure suction devices. Wall-mounted negative pressure suction devices provide negative pressure through a central suction station in the hospital, resulting in a high negative pressure value, making them unsuitable for treating small wounds. They can only be used in the hospital and cannot be used at home. Negative pressure wound therapy devices provide negative pressure via a negative pressure pump connected to a power source or batteries. They can be used to treat small wounds, but are not portable, are noisy, cumbersome to operate, require a power source or batteries, and cannot be used continuously for extended periods, causing inconvenience for patients using them at home. Disposable negative pressure suction devices provide negative pressure by maintaining a negative pressure state within the drainage bottle. It is difficult to maintain a stable negative pressure value; typically, the negative pressure is high at the beginning and then gradually decreases, which is not conducive to continuous negative pressure suction treatment of wounds, and the drainage bottle is inconvenient to carry. Furthermore, all three types of negative pressure suction devices require professional knowledge or training to use, making them unsuitable for home use by patients. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a manual negative pressure suction device.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A manual negative pressure suction device, comprising:

[0007] The seat body has a negative pressure chamber and an air inlet and an air outlet connected to the negative pressure chamber. The air inlet and outlet are respectively equipped with a first one-way valve opening in the air inlet direction and a second one-way valve opening in the air outlet direction; a piston rod is movably and sealingly adapted to the negative pressure chamber, and the outer surface of the piston rod has several scale lines; and

[0008] An elastic device is located inside the negative pressure chamber, with its two ends abutting against the piston rod and the seat respectively, and is used to control the piston rod to move in the opposite direction of pressing.

[0009] Furthermore, the piston rod has a piston head at one end located in the negative pressure chamber, and a limiting protrusion at the other end along the radial direction of the piston rod.

[0010] Furthermore, the scale line is located between the piston head and the limiting protrusion.

[0011] Furthermore, the piston head is provided with a mounting groove along its circumferential direction, and a sealing ring is provided in the mounting groove, which is in sealing fit with the piston head.

[0012] Furthermore, the seat is also equipped with an exhaust channel, with an air inlet and an air outlet located at the air inlet and air outlet ends of the exhaust channel, respectively, and a connection hole connecting the negative pressure chamber and the exhaust channel.

[0013] Furthermore, the connecting hole is provided with a first connecting protrusion at the orifice position in the negative pressure chamber, and the end of the piston head extends axially with a second connecting protrusion, and an elastic device connects the first connecting protrusion and the second connecting protrusion.

[0014] Furthermore, the elastic device is an elastic element, with its two ends respectively fitted onto the first connecting protrusion and the second connecting protrusion.

[0015] Furthermore, the seat body is provided with a backstop cap at the opening of the negative pressure chamber, and the piston head is provided with a backstop surface that matches the backstop cap. The piston head abuts against the backstop cap through the backstop surface.

[0016] Furthermore, the air inlet and air outlet of the seat are respectively provided with a first cover plate and a second cover plate. The first one-way valve is fixed to the air inlet through the first cover plate, and the second one-way valve is fixed to the air outlet through the second cover plate.

[0017] Furthermore, wound dressings are placed at the air intake position on the outside of the seat.

[0018] The beneficial effects of this utility model are:

[0019] 1. The present invention proposes a manual negative pressure suction device. The user only needs to manually compress the push rod to expel the air. The elastic device can automatically spring up the push rod to form a suction force, without the user having to manually pull the push rod. This avoids the manual negative pressure therapy device shaking during the pulling of the push rod, or the need to use other external forces to fix the manual negative pressure therapy device in advance. It is easy to operate and use, saves physical strength, and increases the stability of the manual negative pressure therapy device during the treatment process.

[0020] 2. This utility model proposes a manual negative pressure suction device that is easy and simple to operate, can be operated with one hand, requires no professional knowledge, and is convenient for patients to use at home; it is small in size, with the base and wound dressing integrated; it operates with low noise, making it convenient for patients to use at home; it does not require connection to batteries or a power source, and can be used continuously for a long time; when the negative pressure value decreases, the piston head can be pushed at any time to replenish the negative pressure to achieve a therapeutic effect.

[0021] 3. The manual negative pressure suction device proposed in this utility model automatically springs up the push rod to form a suction force by setting an elastic device, so that the user does not need to manually pull the push rod. This avoids the manual negative pressure therapy device shaking during the process of pulling the push rod, or the need to use other external forces to fix the manual negative pressure therapy device in advance. It is easy to operate and saves physical strength.

[0022] 4. The manual negative pressure suction device proposed in this utility model allows for intuitive observation of whether the required negative pressure value for treatment has been reached by setting scale lines when supplementing negative pressure.

[0023] 5. The present invention proposes a manual negative pressure suction device, which, through the setting of wound dressing, has no drainage tube, is easy to carry, and can be placed on the patient's wound to suction the patient's exudate. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a manual negative pressure suction device according to the present invention;

[0026] Figure 2 This is an exploded view of a manual negative pressure suction device according to the present invention;

[0027] Figure 3 This is a cross-sectional view of a manual negative pressure suction device according to the present invention;

[0028] Figure 4 This is a scenario illustration of a manual negative pressure suction device according to this utility model.

[0029] In the diagram, 10 is the seat; 101 is the exhaust channel; 1011 is the air inlet; 1012 is the air outlet; 102 is the negative pressure chamber; 103 is the connecting hole; 1031 is the first connecting protrusion; 201 is the piston rod; 2011 is the scale line; 202 is the limiting protrusion; 203 is the piston head; 2031 is the mounting groove; 2032 is the second connecting protrusion; 2033 is the anti-reverse surface; 30 is the elastic element; 401 is the first one-way valve; 402 is the second one-way valve; 50 is the sealing ring; 60 is the anti-reverse cap; and 70 is the wound dressing. Detailed Implementation

[0030] The following is combined with Figure 1-3 This utility model will be described in detail.

[0031] A manual negative pressure suction device, such as Figure 1-2 As shown, it includes:

[0032] The seat 10 includes a negative pressure chamber 102 and an air inlet 1011 and an air outlet 1012 connected to the negative pressure chamber 102. The air inlet 1011 and the air outlet 1012 are respectively equipped with a first one-way valve 401 opening in the air inlet direction and a second one-way valve 402 opening in the air outlet direction. The volume of the negative pressure chamber 102 is 15-50 ml, preferably 20 ml. A piston rod 201 is movably and sealingly adapted to the negative pressure chamber 102, and its outer surface is provided with several scale lines 2011.

[0033] An elastic device is located inside the negative pressure chamber 102, and its two ends abut against the piston rod 201 and the seat 10, respectively, to control the piston rod 201 to move in the opposite direction of pressing.

[0034] When the piston rod 201 is pushed, the first one-way valve 401 is closed, and the gas is discharged through the second one-way valve 402. The elastic device is deformed into a compressed state. When the piston rod 201 is released, the exhaust one-way valve is closed, and the elastic device bounces up the piston rod 201 to form a negative pressure. The external gas enters the negative pressure chamber 102 through the first one-way valve 401.

[0035] In this embodiment, the piston rod 201 is provided with a piston head 203 at one end located in the negative pressure chamber 102, and a limiting protrusion 202 is provided at the other end along the radial direction of the piston rod 201.

[0036] In this embodiment, the scale line 2011 is located between the piston head 203 and the limiting protrusion 202. The piston rod 201 can be equidistantly provided with a plurality of scale lines 2011 along its axial direction. Different scale lines 2011 represent different negative pressure values. The scale lines 2011 distributed sequentially from the outside to the inside represent negative pressure values ​​from high to low. In this embodiment, the piston rod 201 is provided with one scale line 2011. This scale line 2011 represents the negative pressure value suitable for treatment. When the piston rod 201 is repeatedly squeezed, the negative pressure chamber 102 continuously exhausts air, which can reach the negative pressure value required for treatment. At this time, the piston rod 201 is affected by the external atmospheric pressure and moves towards the negative pressure chamber 102. The scale line 2011 then moves to the opening position of the negative pressure chamber 102.

[0037] In this embodiment, the piston head 203 is provided with a mounting groove 2031 along its circumferential direction, and a sealing ring 50 is provided in the mounting groove 2031, which is sealed and fitted with the piston head 203.

[0038] In this embodiment, the seat 10 is also provided with an exhaust channel 101, with an air inlet 1011 and an air outlet 1012 respectively located at the air inlet end and the air outlet end of the exhaust channel 101, and a connecting hole 103 connecting the negative pressure chamber 102 and the exhaust channel 101.

[0039] In this embodiment, the connecting hole 103 is provided with a first connecting protrusion 1031 at the orifice position within the negative pressure chamber 102, and the end of the piston head 203 extends axially with a second connecting protrusion 2032. An elastic device connects the first connecting protrusion 1031 and the second connecting protrusion 2032. Further, the elastic device is an elastic element 30, with both ends of the elastic element 30 respectively sleeved on the second connecting protrusion 2032 and the first connecting protrusion 1031.

[0040] In this embodiment, the seat 10 is provided with a backstop cap 60 at the opening of the negative pressure chamber 102, and the piston head 203 is provided with a backstop surface 2033 adapted to the backstop cap 60. The piston head 203 abuts against the backstop cap 60 through the backstop surface 2033. The outer wall of the seat 10 is provided with a insertion groove. The backstop cap 60 includes an insertion part adapted to the insertion groove and a backstop protrusion extending into the opening of the negative pressure chamber 102. The insertion part is spliced ​​and fixed to the insertion groove. Part of the backstop protrusion is located at the opening of the negative pressure chamber 102. When the elastic member 30 rebounds and drives the piston rod 201 to move, the backstop protrusion abuts against the backstop surface 2033 of the piston head 203.

[0041] In this embodiment, the air inlet 1011 and air outlet 1012 of the seat 10 are respectively provided with a first cover plate and a second cover plate. The first one-way valve 401 is fixed to the air inlet 1011 by the first cover plate, and the second one-way valve 402 is fixed to the air outlet 1012 by the second cover plate. The air inlet 1011 and air outlet 1012 of the seat 10 are also respectively provided with a first mounting groove and a second mounting groove. The first one-way valve 401 is placed on the first mounting groove and fixed by the first cover plate, and the second one-way valve 402 is placed on the second mounting groove and fixed by the second cover plate.

[0042] In this embodiment, the piston head 203 has a first connecting protrusion 2032 extending axially from its end, and a second connecting protrusion 1031 is provided at the orifice position of the connecting hole 103 within the negative pressure chamber 102. An elastic device connects the first connecting protrusion 2032 and the second connecting protrusion 1031. Further, the elastic device is an elastic element 30, with both ends of the elastic element 30 respectively sleeved on the first connecting protrusion 2032 and the second connecting protrusion 1031. The elastic element 30 is a spring, with both ends of the spring respectively sleeved on the first connecting protrusion 2032 and the second connecting protrusion 1031.

[0043] In this embodiment, as Figure 4 As shown, a wound dressing 70 is arranged at the air inlet 1011 on the outer side of the seat 10. Specifically, the wound dressing 70 is a composite material, including at least a hydrophobic material, a water-absorbing material, and an adhesive, to achieve negative pressure conduction, exudate absorption, and wound adhesion during negative pressure wound therapy. The wound dressing 70 is bonded to the seat 10 by adhesive at the edge of the air inlet 1011, and the adhesive area of ​​the wound dressing 70 is made of an airtight material to prevent outside air from flowing into the negative pressure chamber 102 through the wound dressing 70 during use.

[0044] The present invention provides a manual negative pressure suction device, the method of which is as follows:

[0045] In use, the air inlet 1011 of the seat 10 is aligned with the wound, and the wound dressing 70 is applied to the wound. Simply push the piston rod 201 with one hand to compress the air in the negative pressure chamber 102, forcing the air in the negative pressure chamber 102 to open the one-way sealing ring 50 of the air outlet 1012, allowing air to flow out from the air outlet 1012. Upon release, the piston returns under the action of the spring, creating negative pressure in the negative pressure chamber 102. The first one-way valve 401 of the air inlet 1011 opens, allowing air from the wound dressing 70 connected to the air inlet 1011 to return to the negative pressure chamber 102, also creating negative pressure. After the elastic element 30 returns to its original position, pushing the piston again and repeating the above process can increase the negative pressure in the negative pressure chamber 102. After repeatedly pushing the piston and releasing it, observe the scale line 2011. When the scale line 2011 is no longer visible, it indicates that the negative pressure in the negative pressure chamber 102 has reached the required negative pressure value for treatment. When the negative pressure value in the negative pressure chamber 102 decreases, the piston can be pushed to bring the negative pressure back to the value required for treatment. The wound dressing 70 can absorb exudate from the wound, and the one-way sealing ring 50 of the air inlet 1011 is a waterproof and breathable membrane that prevents exudate from entering the negative pressure pump and thus prevents contamination.

[0046] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A manual negative pressure suction device, characterized in that, include: The seat body is provided with a negative pressure chamber and an air inlet and an air outlet connected to the negative pressure chamber. The air inlet and the air outlet are respectively provided with a first one-way valve that opens in the air inlet direction and a second one-way valve that opens in the air outlet direction. A piston rod, which is movably and sealingly adapted to the negative pressure chamber, and the outer surface of the piston rod is provided with several scale lines; and An elastic device is located inside the negative pressure chamber, and both ends of the elastic device abut against the piston rod and the seat respectively, for controlling the piston rod to move in the opposite direction of pressing.

2. The manual negative pressure suction device as described in claim 1, characterized in that, The piston rod has a piston head at one end located in the negative pressure chamber, and a limiting protrusion at the other end along the radial direction of the piston rod.

3. The manual negative pressure suction device as described in claim 2, characterized in that, The scale line is located between the piston head and the limiting protrusion.

4. A manual negative pressure suction device as described in claim 2, characterized in that, The piston head is provided with a mounting groove along its circumferential direction, and a sealing ring is provided in the mounting groove, which is in a sealing fit with the piston head.

5. A manual negative pressure suction device as described in claim 2, characterized in that, The seat body is also provided with an exhaust channel, and the air inlet and the air outlet are respectively located at the air inlet end and the air outlet end of the exhaust channel. The negative pressure chamber and the exhaust channel are connected by a connecting hole.

6. A manual negative pressure suction device as described in claim 5, characterized in that, The connecting hole is provided with a first connecting protrusion at the orifice position in the negative pressure chamber, and the end of the piston head extends axially with a second connecting protrusion. An elastic device connects the first connecting protrusion and the second connecting protrusion.

7. A manual negative pressure suction device as described in claim 6, characterized in that, The elastic device is an elastic element, and the two ends of the elastic element are respectively sleeved on the first connecting protrusion and the second connecting protrusion.

8. A manual negative pressure suction device as described in claim 2, characterized in that, The seat body is provided with a backstop cap at the opening of the negative pressure chamber, and the piston head is provided with a backstop surface adapted to the backstop cap. The piston head abuts against the backstop cap through the backstop surface.

9. A manual negative pressure suction device as described in claim 1, characterized in that, The air inlet and air outlet of the seat are respectively provided with a first cover plate and a second cover plate. The first one-way valve is fixed to the air inlet through the first cover plate, and the second one-way valve is fixed to the air outlet through the second cover plate.

10. A manual negative pressure suction device as described in claim 1, characterized in that, Wound dressings are placed at the air inlet position on the outside of the seat.

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