Injection device

Abstract

The invention discloses an injection device, and relates to an injection appliance, the injection device comprises a support cylinder, the support cylinder is used for being inserted into an injection port; a sleeve bag is fixedly installed in the middle of the outer side of the supporting cylinder and located on the side wall of the injection opening, and an inflation pipe is installed on the sleeve bag. One end of the injection cylinder is of an opening structure, a through hole is formed in the other end of the injection cylinder, and a piston and a push rod are installed in the injection cylinder; the injection cylinder is inserted into the supporting cylinder from the upper end of the supporting cylinder. By arranging the supporting barrel, the injection barrel and the sleeve bag, when fluid is injected, the supporting barrel is inserted into the injection opening, the sleeve bag is inflated and swelled, the injection channel is blocked after the detection bag swells, and the fluid is prevented from leaking and flowing out of the injection channel when the fluid is injected; in addition, feeding work of the senile dementia patient can be achieved, when the patient is fed with medicine or food, the supporting cylinder is inserted into the oral cavity once, and fluid is injected into the supporting cylinder through the injection cylinder.

Description

Technical Field

[0001] The invention relates to an injection device, in particular to an injection apparatus. Background Art

[0002] As a kind of construction machinery, excavators (diggers) and forklifts are widely used in the construction of ditches, roads, bridges and houses. Since the large and small arms and buckets of excavators or forklifts move relative to each other at dozens of positions during operation, the pins and sleeves of these parts are constantly in friction during operation, and since the workload of excavators (or forklifts) is relatively large, the forces are also relatively large.

[0003] Therefore, the moving parts of the large and small arms and buckets of excavators or forklifts are equipped with reserved lubricant injection and retention channels to facilitate the regular addition of butter (i.e., lubricating grease). Currently, when adding butter, the nozzle of the oil gun is aimed at the injection port to inject the butter. However, when injecting the butter, the oil gun will shake slightly, causing the butter to overflow from the injection port. Or, when injecting the butter, since the butter (lubricating grease) is a semi-solid lubricant with certain fluidity but high viscosity, especially when injecting the butter into the injection port, the butter will accumulate and be squeezed at the edge of the injection port before being gradually pressed into the injection port or the retention channel. The accumulation and squeezing of the butter at the edge will cause the butter to leak from the edge of the injection port. Summary of the invention

[0004] The object of the present invention is to provide an injection device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an injection device, comprising:

[0006] The support tube is a cylindrical structure with openings at both ends, and the support tube is used to be inserted into the injection port;

[0007] A cuff is fixedly installed in the middle of the outer side of the support tube, and the cuff is located at the side wall of the injection port. An inflation tube is installed on the cuff, and the inflation tube inflates the cuff with air. When the cuff is expanded outward, it can support the injection port.

[0008] An injection cylinder, one end of which is an open structure, and the other end of which is provided with a through hole, a piston and a push rod are installed inside the injection cylinder, and the injection cylinder is used to extract fluid;

[0009] The injection tube can be inserted into the interior of the support tube from the upper end of the support tube and slide inside the support tube. The injection tube can flow liquid from the bottom end opening of the support tube into the chamber that needs to be injected.

[0010] Preferably, the cuff is provided with one, and a plurality of evenly distributed convex bodies are fixedly mounted on the outer side of the cuff.

[0011] Preferably, the cuff comprises an inner cuff and an outer cuff, the inner cuff is located inside the outer cuff, and the middle portion of the outer side of the inner cuff is fixedly connected to the middle portion of the inner side wall of the outer cuff;

[0012] Both the inner cuff and the outer cuff are equipped with an inflation tube, and the bulging height of the inner cuff is smaller than that of the outer cuff; when the inner cuff and the outer cuff are filled with gas, a concave ring is formed on the outer side of the outer cuff;

[0013] When the support tube is inserted into the mouth, the concave ring contacts the oral teeth and can open the mouth.

[0014] Preferably, a pressure plate is installed on the upper outer portion of the support tube, and the pressure plate covers the lips of the mouth. An upper cuff is fixedly installed on the support tube above the pressure plate. When the upper cuff is inflated, it provides downward pressure on the pressure plate to seal the mouth.

[0015] Preferably, a support ring is fixedly mounted on the bottom of the inner cavity of the support tube, and when the injection tube is fully inserted into the interior of the support tube, the bottom of the injection tube contacts the support ring.

[0016] Preferably, a discharge pipe is fixedly installed at the through hole.

[0017] Preferably, the diameter of the through hole is the same as the inner diameter of the injection barrel, a bottom plate is axially installed in the through hole, and a plurality of evenly distributed limiting strips are fixedly installed on the bottom plate;

[0018] A plurality of connecting rods are fixedly installed at the bottom edge of the injection cylinder, a supporting frame is fixedly installed at the bottom of the connecting rods, a spring is fixedly installed between the supporting frame and the bottom plate, and the spring provides an upward elastic force to the bottom plate.

[0019] Preferably, a discharge pipe is fixedly installed at the center of the bottom plate.

[0020] Preferably, the limiting strips are distributed in a ring array, and the outer sides of the limiting strips are in sliding contact with the inner side wall of the bottom end of the injection cylinder.

[0021] Preferably, the support frame is a hollow structure, and when the fluid injected into the cylinder flows into the interior of the support cylinder, the fluid can flow downward from the hollow structure of the support frame.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention provides a support tube and an injection tube, and an inflatable cuff is provided on the outside of the support tube. When injecting fluid, the support tube is inserted into the injection port, and the cuff is inflated to swell up. After the cuff is inflated, the injection channel is blocked to prevent the fluid from leaking out of the injection channel when the fluid is injected.

[0024] At the same time, the present invention can also realize the feeding work for patients with Alzheimer's disease. By arranging a support tube and an injection tube, and arranging an inflatable cuff on the outside of the support tube, when feeding medicine or food to the patient, the support tube is inserted into the oral cavity. It is only necessary to insert the support bar once, and the injection tube is used to inject fluid into the support tube, which saves the process of forcing the mouth into each injection, thereby reducing the risk of gum damage to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram of a support tube and an injection tube according to Example 1 of the present invention;

[0026] Figure 2 This is a cross-sectional view of a support tube and an injection tube in Example 1 of the present invention;

[0027] Figure 3 This is a structural diagram of the support cylinder, injection cylinder and pressure plate of Example 1 of the present invention;

[0028] Figure 4 It is a cross-sectional view of a support tube, an injection tube and a cuff according to Embodiment 2 of the present invention;

[0029] Figure 5 It is a cross-sectional view of a support tube, an injection tube, a cuff and a pressing plate of Example 2 of the present invention;

[0030] Figure 6 It is a cross-sectional view of the support cylinder, the injection cylinder, and the bottom plate of Example 3 of the present invention;

[0031] Figure 7 This is a structural diagram of the injection cylinder, base plate and spring of Example 3 of the present invention.

[0032] In the figure: 1. support cylinder; 2. injection cylinder; 3. push rod; 4. inflation tube; 5. cuff; 51. outer cuff; 6. upper cuff; 7. pressure plate; 8. support ring; 9. inner cuff; 10. bottom plate; 11. limit strip; 12. spring; 13. connecting rod; 14. support frame. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] As shown in FIG. 1 , this embodiment discloses an injection device, including a support tube 1, a sleeve 5 is fixedly installed in the middle of the outer side of the support tube 1, as shown in FIG. Figure 1-Figure 2 As shown, a plurality of evenly distributed convex points are fixedly mounted on the outer side of the cuff 5 , and the convex points are evenly distributed along the circumferential direction of the cuff 5 .

[0036] The cuff 5 is also provided with an inflation tube 4, which is used to connect with an external air bag or a push-type inflation bag to inflate the cuff 5. When the cuff 5 is not inflated, it is almost attached to the support tube 1. When oiling a machine that needs oiling, such as a forklift or an excavator, the support tube 1 can be inserted into the injection port, and the cuff 5 is almost not in contact with the injection port, which facilitates the insertion of the support tube 1.

[0037] A push rod 3 is placed inside the support tube 1, and a piston is fixedly installed at one end of the push rod 3 located inside the support tube 1. The push rod 3 and the piston can slide inside the support tube 1 along the axial direction of the support tube. The diameter of one end of the support tube 1 inserted into the injection port is smaller than the diameter of the support tube body.

[0038] Before oil injection, by controlling the amount of air in the cuff 5, the bulging height of the cuff 5 can be controlled and the contact pressure between the cuff 5 and the side wall of the injection port can be adjusted. In addition, since the cuff 5 is provided with a convex point structure on the outside, when the cuff 5 expands outward, due to the existence of the convex point structure, a gap is left between the outer wall of the cuff 5 and the inner wall of the injection port. When oil is injected, air can flow outward from the gap to facilitate oil injection. Moreover, since butter is a high-viscosity lubricating oil with a relatively high viscosity, it will not flow out from the gap. When injecting butter, butter can be prevented from being squeezed out of the injection hole.

[0039] Since the oil filling part of a forklift or an excavator requires different amounts of oil, in a further embodiment, an injection cylinder 2 is placed inside the support cylinder 1. The injection cylinder 2 is a cylindrical structure with an opening at one end and a through hole at the other end. A support platform is fixedly installed on the outside of the open end of the injection cylinder 2. A push rod 3 and a piston are also installed in the inner cavity of the injection cylinder 2. The piston is located at the bottom of the push rod 3, and the diameter of the piston is the same as the inner diameter of the injection cylinder 2. The push rod 3 and the piston are inserted into the interior of the injection cylinder 2 from the opening of the injection cylinder 2. When the push rod 3 is pushed, the piston can slide axially inside the injection cylinder 2. When pouring butter, you only need to squeeze the butter into the injection cylinder 2; or the diameter of the injection cylinder 2 is slightly larger than the diameter of ordinary bagged butter, and the bagged butter can be directly placed in the injection cylinder 2. It should be noted that when the bagged butter is placed inside the injection cylinder 2, the injection cylinder 2 cannot be placed inside the support cylinder 1. Therefore, a discharge pipe is fixedly installed in the through hole of the injection cylinder 2. The outer diameter of the discharge pipe is the same as the inner diameter of the support cylinder 1. The discharge pipe can be directly inserted into the discharge pipe to perform oiling operations on the parts that need to be oiled.

[0040] In this embodiment, the support tube 1, the injection tube 2 and the push rod 3 are all made of metal material or hard PVC plastic.

[0041] Example 2

[0042] This design can also be used on patients with Alzheimer's disease. For patients with Alzheimer's disease, especially those with severe Alzheimer's disease, they have lost their basic living ability and cannot take the initiative to eat. They need to be injected by nursing staff. When injecting, the patient's mouth needs to be opened and the liquid medicine or food is injected into the mouth, and the patient will swallow slowly.

[0043] Currently, liquid food is mostly injected into the patient's mouth using a syringe. However, since the patient cannot actively open his mouth, the syringe needs to be inserted into the mouth each time the injection is made, which is troublesome.

[0044] Whether it is for patients with Alzheimer's disease or mental illness, multiple injections are required to complete the injection of the patient. When forced injection, the syringe is forced into the mouth. The syringe needs to be placed vertically with the mouth. Once it is tilted, the head of the syringe will contact the gums, which is easy to damage the patient's gums.

[0045] Therefore, this design can also be used for feeding the above patients, and further optimization is made to the above design:

[0046] The invention comprises a support tube 1, which is a cylindrical structure with two ends open. A sleeve 5 is fixedly installed in the middle of the outer side of the support tube 1. Figure 1-Figure 2 As shown, a plurality of evenly distributed convex points are fixedly mounted on the outer side of the cuff 5 , and the convex points are evenly distributed along the circumferential direction of the cuff 5 .

[0047] The cuff 5 is also provided with an inflating tube 4, which is used to connect with an external air bag or a press-type inflatable bag to inflate the cuff 5. When the cuff 5 is not inflated, it is almost attached to the support tube 1, which makes it easier to insert the support tube 1 into the patient's mouth.

[0048] The support tube 1 is directly inserted into the patient's oral cavity from the mouth (similar to the injection port in Example 1), and the cuff 5 is located at the teeth, and the teeth are in contact with the convex points, which can limit the teeth to prevent the cuff 5 from sliding at the teeth. By controlling the amount of air in the cuff 5, the bulging height of the cuff 5 can be controlled, thereby adjusting the opening size of the mouth.

[0049] When the cuff 5 is filled with air, the cuff 5 can be stretched outward and pressed against the teeth in the oral cavity to move with the teeth, so that the patient can open his mouth. Since the inside of the cuff 5 needs to be filled with gas, the cuff 5 is made of a flexible material. When the patient's mouth is stretched open, since the patient's mouth has a certain bite force, a slight depression will appear at the contact part between the cuff 5 and the teeth. As the gas is gradually filled, the pressure in the cuff 5 increases, and the mouth will open. However, due to the bite force, there will always be a slight depression at the contact part between the cuff 5 and the teeth.

[0050] Since human teeth have corners or sharp edges, in order to prevent the teeth from damaging the cuff 5 , the wall thickness of the cuff 5 is set to be relatively large, which can avoid or reduce the risk of teeth biting the cuff 5 .

[0051] Moreover, the convex points also have a protective effect on the cuff 5. When the cuff 5 is located at the teeth, since the convex points wrap the cuff 5, the convex points will directly contact the teeth and be located between the cuff 5 and the teeth, which can reduce the direct contact between the teeth and the cuff 5, and can reduce or avoid the damage of the teeth to the cuff 5.

[0052] After the support tube 1 is inserted into the mouth, the patient can be fed medicine or food. Since the patient's mouth cannot be opened, it is difficult to complete the bite action or swallowing work. When feeding medicine, it is necessary to feed the water in which the medicine is dissolved into the oral cavity in the form of fluid. When feeding, it is necessary to break the food into pieces to form a fluid, and inject it into the patient in the form of a fluid, so as to facilitate the patient's swallowing. The specific method is as follows: the fluid medicine or food is poured into the upper end opening of the support tube 1 with a soup spoon, and the medicine or food will flow downward from the support tube 1 to the patient's mouth, and the patient can swallow it.

[0053] Due to the supporting effect of the cuff 5, the patient's mouth is in an open state, but the cuff 5 does not press the patient's tongue, so the patient can swallow the fluid directly.

[0054] However, when a spoon is used to feed medicine or food to a patient, the capacity of the spoon is relatively small and it is not convenient to pour the inflow into the upper end opening of the support tube 1. Therefore, in this embodiment, an injection tube 2 is also provided. Figure 1-3 As shown, the injection barrel 2 has a structure similar to that of a needle tube. One end of the injection barrel 2 is designed as an open structure, and the other end is provided with a through hole. A support platform is fixedly installed on the outside of the open end of the injection barrel 2, and a push rod 3 and a piston are also installed in the inner cavity of the injection barrel 2. The piston is located at the bottom of the push rod 3, and the diameter of the piston is the same as the inner diameter of the injection barrel 2. The push rod 3 and the piston are inserted into the interior of the injection barrel 2 from the opening of the injection barrel 2. When the push rod 3 is pushed, the piston can slide axially inside the injection barrel 2. A discharge pipe is fixedly installed at the through hole of the injection barrel 2, as shown in FIG. Figure 3 As shown, the discharge pipe is a truncated cone-shaped cylindrical structure with a large diameter at the upper end and a small diameter at the bottom. When the push rod 3 is pressed, the push rod 3 moves downward with the piston in the injection barrel 2, and the fluid inside the injection barrel 2 is discharged from the discharge pipe. When extracting the fluid, it is only necessary to pull the push rod 3 upward, and a negative pressure will be formed inside the injection barrel 2, and the fluid will flow from the discharge pipe into the injection barrel 2.

[0055] When administering medicine or feeding, the injection tube 2 is inserted into the interior of the support tube 1 from the upper end opening of the support tube 1. Holding the injection tube 2 by hand and pressing the push rod 3 downward, the fluid can be discharged from the injection tube 2, flow into the support tube 1, and then flow from the support tube 1 into the oral cavity.

[0056] In this embodiment, Figure 2 and Figure 4 As shown, a support ring 8 is fixedly installed at the bottom of the inner cavity of the support tube 1, and the support ring 8 supports the injection tube 2. When the injection tube 2 is inserted into the interior of the support tube 1, the bottom of the injection tube 2 contacts the support ring 8, which can prevent the injection tube 2 from being inserted too deeply.

[0057] When the support tube 1 is inserted into the oral cavity, since the patient's mouth is in an open state, once a large amount of injection occurs or the patient does not have time to swallow, the medicine or food fluid will easily flow out of the mouth. Figure 3 and Figure 5 As shown, a pressing plate 7 is also installed on the upper outer part of the support tube 1. The pressing plate 7 is an arc-shaped structure and is made of PE polymer material. A layer of silicone is wrapped on the outer side of the pressing plate 7. The silicone layer is relatively soft and more suitable for fitting with the lips. The pressing plate 7 covers the lips of the oral cavity. An upper cuff 6 is also fixedly installed on the support tube 1 above the pressing plate 7. An inflation tube 4 is installed on the upper cuff 6. When the upper cuff 6 is inflated, it provides downward pressure on the pressing plate 7, so that the pressing plate 7 and the patient's lips fit together.

[0058] After the support tube 1 is inserted into the patient's mouth, the cuff 5 is inflated to open the patient's mouth, and then the pressing plate 7 can be installed. When installing the pressing plate 7, the upper cuff 6 is not inflated, and the pressing plate 7 can be directly inserted from the upper end of the support tube 1 to the outside of the support tube 1 and covered on the patient's lips. After the pressing plate 7 is installed, the upper cuff 6 can be inflated. When the cuff 5 is inflated, part of the cuff 5 is located in the oral cavity, and part of it is located between the teeth and the lips, and the pressing plate 7 can fit the lips.

[0059] like Figure 3 and Figure 5As shown, both ends of the upper cuff 6 are tapered structures, i.e., slope structures. A mounting hole matching the support tube 1 is provided at the center of the pressure plate 7. The tapered structure contacts the upper edge of the mounting hole. The tapered structure provides downward pressure to the pressure plate 7, and the pressure plate fits the patient's mouth under the pressure. When the upper cuff 6 provides downward pressure to the pressure plate 7, the reaction force generated by the pressure will also act on the support tube 1. However, since the patient's teeth will generate a bite force on the cuff, and the contact part between the cuff 5 and the teeth is in a concave state, the support tube 1 will not move upward, and the pressure plate 7 will block the open mouth.

[0060] In this embodiment, the diameter of the upper end of the mounting hole is larger than the diameter of the bottom, and the side wall of the mounting hole is a slope structure. The slope structure of the mounting hole just matches the side wall of the conical structure. After the upper cuff 6 is filled with gas, the slope structure and the conical structure will provide a more stable pressure on the pressure plate 7.

[0061] When feeding medicine, medicine or food fluid can be prevented from flowing out of the mouth or the corner of the mouth. Moreover, when the pressing plate 7 blocks the mouth, the mouth is separated from the external space. When swallowing food, the peristalsis of the mouth muscles forms a negative pressure (generating suction) in the oral cavity, which is more convenient for swallowing fluid.

[0062] When feeding a fluid with a relatively low viscosity such as medicine, it is only necessary to easily press the push rod 3, and the fluid can be discharged from the discharge tube 3. Therefore, when feeding medicine, it is also possible to complete the feeding of medicine without holding the injection tube 2.

[0063] Since the pressing plate 7 fits together with the patient's lips, the pressing plate 7 has a bearing effect on the support tube 1. When feeding medicine, the injection tube 2 is inserted into the interior of the support tube 1 and abuts against the support ring 8, and the push rod 3 is directly pressed downward. Due to the supporting effect of the pressing plate 7, the support tube 1 will not move downward, and the push rod 3 moves downward with the piston in the injection tube 2, so that the medicine can be delivered into the support tube 1 and flow into the patient's mouth from the support tube 1.

[0064] In this embodiment, a support tube and an injection tube are provided, and an inflatable cuff is provided on the outside of the support tube. When feeding medicine or food to the patient, the support tube is inserted into the oral cavity. The support tube only needs to be inserted once, and the fluid is poured into the support tube with the injection tube to achieve injection of the patient, eliminating the process of forcing the tube into the mouth each time for injection, thereby reducing the risk of gum damage to the patient.

[0065] Moreover, when the cuff is inflated, the patient's teeth expand outward, which can make the patient's mouth open. The cuff is relatively soft and contacts the patient's teeth, which can reduce damage to the patient's oral cavity.

[0066] Example 3

[0067] In the case of setting a cuff, after the cuff is filled with gas, the cuff is in a bulging state. When the cuff is placed between the teeth, the cuff is easy to fall off. Moreover, the single-layer cuff is also easy to be scratched by the teeth, resulting in air leakage. In this embodiment, two cuff structures are set. The details are as follows:

[0068] like Figure 4-5 As shown, the cuff includes an inner cuff 9 and an outer cuff 51, both of which are fixedly connected to the outer wall of the support tube 1, and the inner cuff 9 is located inside the outer cuff 51, and the middle part of the outer side of the inner cuff 9 is fixedly connected to the middle part of the inner side wall of the outer cuff 51. The bulging height of the inner cuff 9 is smaller than that of the outer cuff 51; when the inner cuff 9 and the outer cuff 51 are filled with gas, the bulging height of the inner cuff 9 is smaller, which will cause a pull on the center of the outer cuff 51, and a circle of concave rings will be formed at the center of the outer side of the outer cuff 51, and the bulging height gradually increases from the center of the outer cuff 51 to the outside, as shown in FIG. Figure 4 shown.

[0069] When the support tube 1 is inserted into the mouth, the concave ring contacts the teeth in the mouth and can open the mouth. The concave ring is the lowest point of the outer sleeve 51, and a slope is formed on the outside of the outer sleeve 51. When the teeth are opened, the teeth slide along the slope to the lowest point. When the outer sleeve 51 opens the mouth, the contact with the teeth is more stable. Moreover, the contact part between the teeth and the outer sleeve 51 (i.e., the occlusal part) is the connection between the inner sleeve 9 and the outer sleeve 51. The thickness of the sleeve is the largest, and the contact part with the teeth is thicker, firmer, more wear-resistant, scratch-resistant, and durable.

[0070] Both the inner cuff 9 and the outer cuff 51 are equipped with an inflation tube 4 for inflating the inner cuff 9 and the outer cuff 51 .

[0071] When the outer sleeve 51 and the inner sleeve 9 are inflated, the inner sleeve 9 is inflated first, and then the outer sleeve 51 is inflated, so that the two airbags can be expanded better. If the outer sleeve 51 is inflated first, the outer sleeve 51 will squeeze the inner sleeve 9. If the inner sleeve 9 is inflated, the space between the outer sleeve 51 and the inner sleeve 9 will be compressed when the inner sleeve 9 swells, which will cause the inner sleeve 9 to swell insufficiently, affecting the outer sleeve 51's effect of opening the mouth.

[0072] Example 4

[0073] When injecting liquid food into the patient, such as crushed rice porridge, rice noodles or millet porridge, due to the high viscosity of the liquid food and the small diameter of the discharge tube, the flow rate of the liquid food is slow, and it is easy for rice grains to clog the discharge tube, which will affect the feeding of the patient.

[0074] like Figure 6-7As shown, the difference between this embodiment and embodiment 1 or embodiment 2 is that the interior of the support tube 1 is a smooth structure. The bottom through hole of the injection tube 2 is the same as the inner diameter of the injection tube 2. A bottom plate 10 is axially installed in the through hole, and the bottom plate 10 blocks the through hole. A discharge pipe is fixedly installed at the center of the bottom plate 10. A plurality of limit strips 11 evenly distributed in a circular array are fixedly installed on the bottom plate 10, and the center of the circular array of the limit strips 11 coincides with the central axis of the bottom plate 10. Space is left between adjacent limit strips 11 as a discharge port for the fluid. The outer side of the limit strip 11 is an arc-shaped structure, and the outer side of the limit strip 11 contacts the inner side wall of the bottom end of the injection tube 2. The limit strip 11 and the bottom plate 10 can slide downward from the bottom of the injection tube 2, so that the through hole is opened, and the fluid can flow directly from the through hole into the support tube 1.

[0075] A plurality of connecting rods 13 are fixedly installed at the bottom edge of the injection cylinder 2, a support frame 14 is fixedly installed at the bottom of the connecting rods 13, a spring 12 is installed between the support frame 14 and the bottom plate 10, the top of the spring 12 is fixedly connected to the bottom plate 10, and the bottom is fixedly connected to the support frame 14, and the spring 12 provides an upward elastic force to the bottom plate 10.

[0076] The support frame 14 is a hollow structure with a circular hole at the center of the support frame 14 , and the circular hole is located directly below the discharge pipe. When the base plate 10 moves downward, the discharge pipe just extends into the circular hole to avoid the support frame 14 obstructing the discharge pipe and affecting the movement of the base plate 10 .

[0077] When the fluid injected into the cylinder 2 flows into the support cylinder 1 , the fluid can flow downward from the hollow structure of the support frame 14 .

[0078] When injecting liquid food into the patient, the injection tube 2 is completely inserted into the support tube 1, and the upper support platform of the injection tube 2 is abutted against the upper end of the support tube 1, and the injection tube 2 can be placed in the support tube (or the injection tube 2 support platform is held by hand). When the push rod 3 is pressed, once the liquid food blocks the discharge tube or the viscosity of the liquid food is too high and cannot be discharged from the discharge tube (or the required discharge pressure is relatively large), as the push rod 3 is pressed, the pressure inside the injection tube 2 is greater than the elastic force of the spring 12 on the bottom plate 10. Under the action of pressure, the bottom plate 10 will move downward, and the limit strip 11 will slide downward in the bottom inner cavity of the injection tube 2. The bottom plate 10 is separated from the injection tube 2, and the discharge port is exposed to the outside, and the fluid in the injection tube 2 can flow out from the discharge port into the support tube 1. Subsequently, the fluid can flow downward from the hollow structure of the support frame 14 to the patient's mouth.

[0079] In this embodiment, due to the arrangement of the bottom plate 10 and other structures, the bottom plate 10 and the limit strip 11 can only be opened downwardly by sliding, so when the injection barrel 2 is used to fill a fluid with relatively high viscosity, the push rod 3 and the piston need to be taken out from the injection barrel 2, and the fluid is poured from the upper opening of the injection barrel 2 until the injection barrel 2 is filled, and the push rod 3 and the piston can be inserted. The injection of the fluid with high viscosity can be completed for the patient.

[0080] In this embodiment, the injection tube 2 can also be used to inject a relatively fluid medicine into the patient. When extracting the medicine, since the fluidity of the medicine is relatively high, the push rod 3 and the piston are placed in the injection tube 2, and the medicine can be extracted using the piston and the push rod 3. When extracting the medicine, a negative pressure is generated in the injection tube 2. Since the fluidity of the medicine is relatively high, the medicine can be directly sucked into the injection tube 2 from the discharge pipe. Moreover, during and after the absorption of the medicine, the injection tube 2 is always kept in a negative pressure state, and there will be no leakage of liquid at the connection between the bottom plate 10 and the limit strip 11 and the injection tube 2.

[0081] When injecting liquid medicine into the patient, the injection tube 2 is also placed in the support tube 1, and the push rod 3 can be pressed, and the push rod 3 moves downward with the piston, and the liquid medicine will be discharged from the discharge tube. When the pressing force is relatively large, once the pressure inside the injection tube 2 is greater than the elastic force of the spring 12, the bottom plate 10 and the limit strip 11 will move downward, the discharge port will open, and the discharge port and the discharge tube will discharge liquid at the same time, which can provide a larger injection amount. When pressing faster, the internal pressure of the injection tube 2 suddenly increases, and the discharge port opens and the displacement increases greatly. When the liquid flows out of the injection tube 2, the flow rate will not be too fast, and it will not produce a large flushing force on the oral cavity. If only a single discharge tube is used for discharge, when the push rod 3 is pressed too hard or the pressing speed is too fast, the liquid medicine can only be discharged from the discharge tube, and the liquid medicine will be directly sprayed from the support tube into the oral cavity, which will produce a large impact force on the oral cavity, causing discomfort to the patient, and the patient will have dry heaves or vomiting. However, the present application sets a bottom plate 10, a limit bar 11 and a discharge port. When the pressing force or the pressing speed suddenly increases, the bottom plate 10 and the limit bar 11 move downward, the discharge port opens, and the medicine liquid injected into the cylinder 2 is discharged from the discharge port instead of being sprayed out from the discharge tube. When in use, the patient will not feel uncomfortable due to the impact force generated by the liquid.

[0082] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection device, characterized in that: include The support tube is a cylindrical structure with openings at both ends, and the support tube is used to be inserted into the injection port; A cuff is fixedly installed in the middle of the outer side of the support tube, and the cuff is located at the side wall of the injection port. An inflation tube is installed on the cuff, and the inflation tube inflates the cuff with air. When the cuff is expanded outward, it can support the injection port. An injection cylinder, one end of which is an open structure, and the other end of which is provided with a through hole, a piston and a push rod are installed inside the injection cylinder, and the injection cylinder is used to extract fluid; The injection tube can be inserted into the interior of the support tube from the upper end of the support tube and slide inside the support tube. The injection tube can flow liquid from the bottom end opening of the support tube into the chamber that needs to be injected.

2. An injection device according to claim 1, characterized in that: The sleeve is provided with a plurality of evenly distributed convex points fixedly mounted on the outer side of the sleeve.

3. An injection device according to claim 1, characterized in that: The cuff comprises an inner cuff and an outer cuff, wherein the inner cuff is located inside the outer cuff, and the middle portion of the outer side of the inner cuff is fixedly connected to the middle portion of the inner side wall of the outer cuff; The inner cuff and the outer cuff are both equipped with an inflation tube, and the bulging height of the inner cuff is smaller than that of the outer cuff; when the inner cuff and the outer cuff are filled with gas, a concave ring is formed on the outer side of the outer cuff.

4. An injection device according to claim 3, characterized in that: A pressure plate is also installed on the upper outer side of the support tube, and the pressure plate covers the edge of the injection port. An upper cuff is also fixedly installed on the support tube above the pressure plate. When the upper cuff is inflated, it provides downward pressure on the pressure plate to seal the injection port.

5. An injection device according to any one of claims 1 to 4, characterized in that: A support ring is fixedly installed at the bottom of the inner cavity of the support tube. When the injection tube is fully inserted into the interior of the support tube, the bottom of the injection tube contacts the support ring.

6. An injection device according to claim 1, characterized in that: A discharge pipe is fixedly installed at the through hole.

7. An injection device according to claim 1, characterized in that: The diameter of the through hole is the same as the inner diameter of the injection cylinder, a bottom plate is axially installed in the through hole, and a plurality of evenly distributed limiting strips are fixedly installed on the bottom plate; A plurality of connecting rods are fixedly installed at the bottom edge of the injection cylinder, a supporting frame is fixedly installed at the bottom of the connecting rods, a spring is fixedly installed between the supporting frame and the bottom plate, and the spring provides an upward elastic force to the bottom plate.

8. An injection device according to claim 7, characterized in that: A discharge pipe is fixedly installed at the center of the bottom plate.

9. An injection device according to claim 7, characterized in that: The limiting strips are distributed in a ring array, and the outer sides of the limiting strips are in sliding contact with the inner side wall of the bottom end of the injection cylinder.

10. An injection device according to claim 7, characterized in that: The support frame is a hollow structure. When the fluid injected into the cylinder flows into the interior of the support cylinder, the fluid can flow downward from the hollow structure of the support frame.

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