CN107157779B - Nutrient solution pusher - Google Patents
Nutrient solution pusher Download PDFInfo
- Publication number
- CN107157779B CN107157779B CN201710505044.3A CN201710505044A CN107157779B CN 107157779 B CN107157779 B CN 107157779B CN 201710505044 A CN201710505044 A CN 201710505044A CN 107157779 B CN107157779 B CN 107157779B
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- China
- Prior art keywords
- push rod
- pair
- hole
- inner core
- spring
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0026—Parts, details or accessories for feeding-tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J15/00—Feeding-tubes for therapeutic purposes
- A61J15/0015—Gastrostomy feeding-tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Abstract
A nutrient solution pusher, comprising: barrel, push rod, piston head and slide block; the piston head comprises a sealing sleeve and an inner core; the second end of the inner core is provided with at least one pair of support arms extending outwards, and each pair of support arms of the at least one pair of support arms is arranged close to the periphery of the inner core in a way of being opposite to each other; each supporting arm is provided with a guide hole; each guide hole is slidably inserted with one slide block; the first end of the sliding block is provided with a friction cushion, and the second end of the sliding block is provided with a first hole; the first end of the push rod is provided with at least one pair of support sheets, and each pair of support sheets in the at least one pair of support sheets are respectively formed on two opposite sides of the first end of the push rod; each support piece is provided with a second hole; one of the first holes corresponds to one of the second holes; a rigid connecting rod is connected between one first hole and one second hole corresponding to the first hole; a spring is further supported between the second end of the inner core and the first end of the push rod.
Description
Technical Field
The invention relates to a medical apparatus, in particular to a nutrient solution pusher.
Background
The patient of the gastric tube intubation, taking food, needs to push the nutrient solution into the patient's stomach via the gastric tube by the nutrient solution pusher. The nutrient solution should not be too fast during the pushing process. Too fast pushing of the nutrient solution easily causes gastric distention due to too large gastric capacity in a short period, and easily causes reflex hypotension and heart rate drop; in addition, vomiting is easily caused, and aspiration is caused by food reflux, so that aspiration pneumonia is caused.
Disclosure of Invention
In view of the above, the present invention aims to propose a nutrient solution pusher that can automatically slow down when a user pushes a nutrient solution too fast.
To this end, the invention proposes a nutrient solution pusher comprising: barrel, push rod, piston head and slide block;
the piston head comprises a sealing sleeve and an inner core; the inner core is formed of a rigid plastic; the inner core is covered by the sealing sleeve at the periphery, the second end of the inner core is provided with at least one pair of supporting arms in an outward extending way, and each pair of supporting arms of the at least one pair of supporting arms are arranged close to the periphery of the inner core in a way of being opposite to each other; each supporting arm is provided with a guide hole; each guide hole is slidably inserted with one slide block;
the first end of the sliding block is provided with a friction cushion, and the second end of the sliding block is provided with a first hole;
the first end of the push rod is provided with at least one pair of support sheets, and each pair of support sheets in the at least one pair of support sheets are respectively formed on two opposite sides of the first end of the push rod; each support piece is provided with a second hole; one of the first holes corresponds to one of the second holes;
a rigid connecting rod is connected between one first hole and one second hole corresponding to the first hole, a first end of the rigid connecting rod is rotatably inserted into the first hole, and a second end of the rigid connecting rod is rotatably inserted into the second hole;
a spring is further supported between the second end of the inner core and the first end of the push rod; when the spring is not pushed by the push rod, the rigid connecting rod is inclined to the push rod;
the piston head is accommodated in the cylinder, and the sealing sleeve is contacted with the inner surface of the cylinder to form a seal for nutrient solution;
when the nutrient solution is pushed, the pushing force acts on the push rod, and the first end of the push rod pushes the inner core through the spring; the spring is shortened by the thrust action, the first end of the push rod is close to the second end of the inner core, the included angle between the rigid connecting rod and the push rod is increased, the slide block is pushed to slide, the friction cushion is tightly contacted with the inner wall of the cylinder body, and the sliding resistance is increased, so that the piston head is prevented from moving rapidly.
The invention also proposes another nutrient solution pusher comprising: barrel, push rod, piston head;
the piston head comprises a sealing sleeve and an inner core; the inner core is formed of a rigid plastic; the inner core is covered by the sealing sleeve at the periphery, the second end of the inner core is provided with at least one pair of supporting arms in an outward extending way, and each pair of supporting arms of the at least one pair of supporting arms are arranged close to the periphery of the inner core in a way of being opposite to each other; each supporting arm is composed of a spring piece;
each supporting arm is provided with a friction cushion, and a second end of the friction cushion is provided with a first hole;
the first end of the push rod is provided with at least one pair of support sheets, and each pair of support sheets in the at least one pair of support sheets are respectively formed on two opposite sides of the first end of the push rod; each support piece is provided with a second hole; one of the first holes corresponds to one of the second holes;
a rigid connecting rod is connected between one first hole and one second hole corresponding to the first hole, a first end of the rigid connecting rod is rotatably inserted into the first hole, and a second end of the rigid connecting rod is rotatably inserted into the second hole;
a spring is further supported between the second end of the inner core and the first end of the push rod; when the spring is not pushed by the push rod, the rigid connecting rod is inclined to the push rod;
the piston head is accommodated in the cylinder, and the sealing sleeve is contacted with the inner surface of the cylinder to form a seal for nutrient solution;
when the nutrient solution is pushed, the pushing force acts on the push rod, and the first end of the push rod pushes the inner core through the spring; the spring is shortened by the pushing force, the first end of the push rod is close to the second end of the inner core, the included angle between the rigid connecting rod and the push rod is enlarged, the supporting arm is bent outwards, the friction cushion is tightly contacted with the inner wall of the cylinder body, and the sliding resistance is increased, so that the piston head is prevented from moving rapidly.
Preferably, the angle between the rigid connecting rod and the push rod is 30-60 degrees when the spring is not pushed by the push rod.
Preferably, the rigid connecting rod is at an angle of 90 degrees to the push rod when the spring is fully compressed.
Preferably, the at least one pair of support arms is in particular two pairs of support arms; the at least one pair of support sheets is specifically two pairs of support sheets.
Preferably, the two pairs of support plates are distributed in a cross shape, and correspondingly, the two pairs of support arms are orthogonally distributed.
When the thrust is too large, the rigid connecting rod can enable the friction pad to be clung to the inner wall of the barrel, the sliding resistance is increased, the sliding speed of the piston is naturally reduced, and nutrient solution is effectively prevented from being pushed into the stomach tube too fast.
Drawings
FIG. 1 is a schematic view of a first state of a first embodiment of a nutrient solution pusher according to the present invention;
FIG. 2 is a schematic view showing a structure of a nutrient solution pusher according to a second state of the first embodiment of the invention;
FIG. 3a is a side view of a first core of the nutrient solution pusher of FIG. 1;
FIG. 3b is a top view of a first core of the nutrient solution pusher of FIG. 3a;
fig. 4a is a side view of a second core of the nutrient solution pusher of fig. 1;
FIG. 4b is a top view of a second core of the nutrient solution pusher of FIG. 4 a;
FIG. 5a is a side view of a slider;
FIG. 5b is a front view of the slider;
FIG. 6a is a front view of a pushrod;
FIG. 6b is a side view of the first end of the pushrod;
fig. 7 is a schematic view showing a structure of a nutrient solution pusher according to a first state of a second embodiment of the invention;
FIG. 8 is a schematic view of a second state of a second embodiment of the nutrient solution pusher of the present invention;
fig. 9 is a side view of another core of the nutrient solution pusher of fig. 7.
Detailed Description
The nutrient solution pusher of the present invention will be described in detail with reference to the accompanying drawings.
A first embodiment of the nutrient solution pusher of the present invention is shown in fig. 1-2 and includes: barrel 10, pushrod 20, piston head, slider 24.
The piston head comprises a sealing sleeve 22 and an inner core 21; the inner core 21 is formed of a rigid plastic; the inner core 21 is covered at its outer periphery by a sealing sleeve 22, and the second end of the inner core 21 is provided with at least one pair of support arms 23 extending outwardly, each pair of support arms 23 of the at least one pair of support arms 23 being provided close to the outer periphery of the inner core 21 in facing relation to each other; each support arm 23 has a guide hole 23a formed therein; a slider 24 is slidably inserted into each of the guide holes 23 a. A reinforcing rib 26 may be further provided between the inner side of each support arm 23 and the second end of the inner core 21.
The first end of the slider 24 is provided with a friction pad 25 and the second end of the slider 24 is provided with a first hole 24a.
The first end of the push rod 20 is formed with at least one pair of support pieces 27, and each pair of support pieces 27 of the at least one pair of support pieces 27 is respectively formed at opposite sides of the first end of the push rod 20; each of the support pieces 27 is formed with a second hole 27a; one first hole 24a corresponds to one second hole 27a; the first end of the push rod 20 is formed with a push handle 30.
A rigid connecting rod 28 is connected between a first hole 24a and a corresponding second hole 27a, a first end of the rigid connecting rod 28 is rotatably inserted into the first hole 24a, and a second end of the rigid connecting rod 28 is rotatably inserted into the second hole 27a.
A spring 29 is further supported between the second end of the inner core 21 and the first end of the push rod 20; the spring 29, when not being pushed by the push rod 20, the rigid connecting rod is inclined to the push rod 20.
The piston head is received within the barrel 10 and the sealing sleeve 22 contacts the inner surface of the barrel 10 to form a seal with the nutrient solution.
When the nutrient solution is pushed, the pushing force acts on the push rod 20, and the first end of the push rod 20 pushes the inner core 21 through the spring 29; the spring 29 is shortened by the pushing force, whereby the first end of the push rod 20 approaches the second end of the inner core 21, and the angle between the rigid connection rod 28 and the push rod 20 becomes large, as shown in fig. 2, thereby pushing the slider 24 to slide, so that the friction pad 25 is closely contacted with the inner wall of the cylinder 10, and the sliding resistance increases, thereby preventing the piston head from moving rapidly.
A second embodiment of the nutrient solution pusher of the present invention is shown in fig. 7-8 and includes: barrel 10, push rod 20, piston head.
The piston head comprises a sealing sleeve 22 and an inner core 21; the inner core 21 is formed of a rigid plastic; the inner core 21 is covered at its outer periphery by a sealing sleeve 22, and the second end of the inner core 21 is provided with at least one pair of support arms 23 extending outwardly, each pair of support arms 23 of the at least one pair of support arms 23 being provided close to the outer periphery of the inner core 21 in facing relation to each other; each support arm 23 is constituted by a leaf spring.
A friction pad 25 is formed on each support arm 23, and a first hole 24a is formed at a second end of the friction pad 25.
The first end of the push rod 20 is formed with at least one pair of support pieces 27, and each pair of support pieces 27 of the at least one pair of support pieces 27 is respectively formed at two opposite sides of the first end of the push rod 20; each of the support pieces 27 is formed with a second hole 27a; one first hole 24a corresponds to one second hole 27a. The first end of the push rod 20 is formed with a push handle 30.
A rigid connecting rod 28 is connected between a first hole 24a and a corresponding second hole 27a, a first end of the rigid connecting rod 28 is rotatably inserted into the first hole 24a, and a second end of the rigid connecting rod 28 is rotatably inserted into the second hole 27a.
A spring 29 is further supported between the second end of the inner core 21 and the first end of the push rod 20; the spring 29, when not being pushed by the push rod 20, the rigid connection rod 28 is inclined to the push rod 20.
The piston head is received within the barrel 10 and the sealing sleeve 22 contacts the inner surface of the barrel 10 to form a seal with the nutrient solution.
When the nutrient solution is pushed, the pushing force acts on the push rod 20, and the first end of the push rod 20 pushes the inner core 21 through the spring 29; the spring 29 is shortened by the pushing force, whereby the first end of the push rod 20 is close to the second end of the inner core 21, the angle between the rigid connection rod 28 and the push rod 20 becomes large, whereby the support arm 23 is bent outward, so that the friction pad 25 is closely contacted with the inner wall of the cylinder, and the sliding resistance increases, thereby preventing the piston head from moving rapidly.
When the spring 29 is not pushed by the push rod 20, the included angle between the rigid connecting rod 28 and the push rod is 30-60 degrees.
When the spring is fully compressed, the angle between the rigid connecting rod and the push rod 20 is 90 degrees, i.e. the rigid connecting rod is perpendicular to the push rod 20.
The support arms 23 are preferably two pairs of support arms 23; correspondingly, the support pieces 27 are also two pairs of support pieces 27.
The two pairs of support plates 27 are distributed in a cross shape, and correspondingly, the two pairs of support arms 23 are orthogonally distributed.
Thus, the push rod is supported in the X, Y directions, so that the push rod is stable, and the friction force of the friction cushion is multiplied.
The friction pad is maintained at a predetermined distance from the inner wall of the barrel, or only lightly in contact with the inner wall of the barrel, prior to pushing the push rod, where the resistance to pushing is primarily the friction of the piston head against the inner wall of the barrel.
During pushing, the spring is compressed, so that the friction cushion moves towards the direction of the inner wall of the cylinder or is further pressed on the inner wall of the cylinder, but the friction force generated by the friction cushion is still small, and the resistance force exerted by pushing is mainly still the friction force between the piston head and the inner wall of the cylinder.
When the pushing thrust reaches a preset value, the friction soft cushion is tightly abutted against the inner wall of the cylinder, and the resistance force exerted by the pushing comprises the friction force between the piston head and the inner wall of the cylinder and the friction force between the friction soft cushion and the inner wall of the cylinder, and the friction force between the friction soft cushion and the inner wall of the cylinder is the main friction force.
With the above-described structure, when the thrust force reaches a predetermined value, the thrust resistance is greatly increased, thereby restricting the nutrient solution from being rapidly thrust.
In order that the deformation of the cartridge caused by the pressure of the friction pad against the inner wall of the cartridge does not affect the seal between the sealing sleeve and the inner wall of the cartridge, the friction pad is sufficiently distant from the sealing sleeve.
Claims (6)
1. A nutrient solution pusher characterized by comprising: barrel, push rod, piston head and slide block;
the piston head comprises a sealing sleeve and an inner core; the inner core is formed of a rigid plastic; the inner core is covered by the sealing sleeve at the periphery, the second end of the inner core is provided with at least one pair of supporting arms in an outward extending way, and each pair of supporting arms of the at least one pair of supporting arms are arranged close to the periphery of the inner core in a way of being opposite to each other; each supporting arm is provided with a guide hole; each guide hole is slidably inserted with one slide block;
the first end of the sliding block is provided with a friction cushion, and the second end of the sliding block is provided with a first hole;
the first end of the push rod is provided with at least one pair of support sheets, and each pair of support sheets in the at least one pair of support sheets are respectively formed on two opposite sides of the first end of the push rod; each support piece is provided with a second hole; one of the first holes corresponds to one of the second holes;
a rigid connecting rod is connected between one first hole and one second hole corresponding to the first hole, a first end of the rigid connecting rod is rotatably inserted into the first hole, and a second end of the rigid connecting rod is rotatably inserted into the second hole;
a spring is further supported between the second end of the inner core and the first end of the push rod; when the spring is not pushed by the push rod, the rigid connecting rod is inclined to the push rod;
the piston head is accommodated in the cylinder, and the sealing sleeve is contacted with the inner surface of the cylinder to form a seal for nutrient solution;
when the nutrient solution is pushed, the pushing force acts on the push rod, and the first end of the push rod pushes the inner core through the spring; the spring is shortened under the thrust action, the first end of the push rod is close to the second end of the inner core, the included angle between the rigid connecting rod and the push rod is increased, the slide block is pushed to slide, the friction cushion is tightly contacted with the inner wall of the cylinder, and the sliding resistance is increased, so that the piston head is prevented from moving rapidly;
when the spring is not pushed by the push rod, the included angle between the rigid connecting rod and the push rod is 30-60 degrees;
when the spring is fully compressed, the angle between the rigid connecting rod and the push rod is 90 degrees.
2. The nutrient solution pusher of claim 1, wherein: the at least one pair of support arms is specifically two pairs of support arms; the at least one pair of support sheets is specifically two pairs of support sheets.
3. The nutrient solution pusher of claim 2, wherein: the two pairs of support plates are distributed in a cross shape, and correspondingly, the two pairs of support arms are orthogonally distributed.
4. A nutrient solution pusher characterized by comprising: barrel, push rod, piston head;
the piston head comprises a sealing sleeve and an inner core; the inner core is formed of a rigid plastic; the inner core is covered by the sealing sleeve at the periphery, the second end of the inner core is provided with at least one pair of supporting arms in an outward extending way, and each pair of supporting arms of the at least one pair of supporting arms are arranged close to the periphery of the inner core in a way of being opposite to each other; each supporting arm is composed of a spring piece;
each supporting arm is provided with a friction cushion, and a second end of the friction cushion is provided with a first hole;
the first end of the push rod is provided with at least one pair of support sheets, and each pair of support sheets in the at least one pair of support sheets are respectively formed on two opposite sides of the first end of the push rod; each support piece is provided with a second hole; one of the first holes corresponds to one of the second holes;
a rigid connecting rod is connected between one first hole and one second hole corresponding to the first hole, a first end of the rigid connecting rod is rotatably inserted into the first hole, and a second end of the rigid connecting rod is rotatably inserted into the second hole;
a spring is further supported between the second end of the inner core and the first end of the push rod; when the spring is not pushed by the push rod, the rigid connecting rod is inclined to the push rod;
the piston head is accommodated in the cylinder, and the sealing sleeve is contacted with the inner surface of the cylinder to form a seal for nutrient solution;
when the nutrient solution is pushed, the pushing force acts on the push rod, and the first end of the push rod pushes the inner core through the spring; the spring is shortened under the thrust action, the first end of the push rod is close to the second end of the inner core, the included angle between the rigid connecting rod and the push rod is increased, the supporting arm is outwards bent, the friction cushion is tightly contacted with the inner wall of the cylinder, and the sliding resistance is increased, so that the piston head is prevented from moving rapidly;
when the spring is not pushed by the push rod, the included angle between the rigid connecting rod and the push rod is 30-60 degrees;
when the spring is fully compressed, the angle between the rigid connecting rod and the push rod is 90 degrees.
5. The nutrient solution pusher of claim 4, wherein: the at least one pair of support arms is specifically two pairs of support arms; the at least one pair of support sheets is specifically two pairs of support sheets.
6. The nutrient solution pusher of claim 5, wherein: the two pairs of support plates are distributed in a cross shape, and correspondingly, the two pairs of support arms are orthogonally distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505044.3A CN107157779B (en) | 2017-06-28 | 2017-06-28 | Nutrient solution pusher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710505044.3A CN107157779B (en) | 2017-06-28 | 2017-06-28 | Nutrient solution pusher |
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| Publication Number | Publication Date |
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| CN107157779A CN107157779A (en) | 2017-09-15 |
| CN107157779B true CN107157779B (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710505044.3A Active CN107157779B (en) | 2017-06-28 | 2017-06-28 | Nutrient solution pusher |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110604697A (en) * | 2019-09-26 | 2019-12-24 | 中国人民解放军陆军军医大学第一附属医院 | Digestion feeding device |
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| US4973316A (en) * | 1990-01-16 | 1990-11-27 | Dysarz Edward D | One handed retractable safety syringe |
| TWM315788U (en) * | 2007-02-08 | 2007-07-21 | Bi-Shan Jou | Cylinder device with constant push |
| CN101720240A (en) * | 2007-07-24 | 2010-06-02 | Lts勒曼治疗系统股份公司 | Disposable injector with manually actuated piston |
| CN102716529A (en) * | 2012-06-29 | 2012-10-10 | 甘李药业有限公司 | Pen injector |
| CN202479840U (en) * | 2012-03-08 | 2012-10-10 | 上海汇大机械制造有限公司 | Pressing mechanism of pushing cylinder |
| CN203861697U (en) * | 2014-03-06 | 2014-10-08 | 中国人民解放军第三军医大学第一附属医院 | Automatic injector |
| CN204411299U (en) * | 2014-09-29 | 2015-06-24 | 贝尔迪柯综合解决方案公司 | The device of detecting object movement, containing this device and the assembly of pressure transducer and the containment of object |
| CN205386281U (en) * | 2016-02-02 | 2016-07-20 | 西安金六棠生物科技有限公司 | Multi -functional medicine pusher |
| CN205434564U (en) * | 2016-02-14 | 2016-08-10 | 中国人民解放军总医院 | Liquid transferring device |
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2017
- 2017-06-28 CN CN201710505044.3A patent/CN107157779B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4973316A (en) * | 1990-01-16 | 1990-11-27 | Dysarz Edward D | One handed retractable safety syringe |
| TWM315788U (en) * | 2007-02-08 | 2007-07-21 | Bi-Shan Jou | Cylinder device with constant push |
| CN101720240A (en) * | 2007-07-24 | 2010-06-02 | Lts勒曼治疗系统股份公司 | Disposable injector with manually actuated piston |
| CN202479840U (en) * | 2012-03-08 | 2012-10-10 | 上海汇大机械制造有限公司 | Pressing mechanism of pushing cylinder |
| CN102716529A (en) * | 2012-06-29 | 2012-10-10 | 甘李药业有限公司 | Pen injector |
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| CN204411299U (en) * | 2014-09-29 | 2015-06-24 | 贝尔迪柯综合解决方案公司 | The device of detecting object movement, containing this device and the assembly of pressure transducer and the containment of object |
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| CN205434564U (en) * | 2016-02-14 | 2016-08-10 | 中国人民解放军总医院 | Liquid transferring device |
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