Handheld disposable dosing device

Abstract

The invention provides a handheld disposable dosing device which comprises an injector shell and a piston rod arranged in the injector shell, and the piston rod is in sliding connection with the injector shell; wherein a pressing plate is arranged at the end, away from the syringe shell, of the piston rod, a limiting ring is connected to the outer surface of the piston rod in a sliding mode, and the diameter of the cross section of the limiting ring is equal to the diameter of the cross section of the inner circle of the syringe shell. The diameter of the section of the limiting ring is the same as that of the section of the piston head, the through groove is formed in the limiting ring, and the size of the through groove is the same as that of the cross section of the piston rod, so that the limiting ring can be connected to the outer surface of the piston rod in a sleeving mode; the problem that the friction force between a piston head and an injector is increased due to deviation of the piston rod is solved.

Description

Technical Field

[0001] The invention relates to the technical field of anorectal surgery, in particular to a handheld disposable medication device. Background Art

[0002] In the treatment of anorectal surgery, a syringe is needed for injection. The syringe is a commonly used medical device used to inject drugs or other liquids into the human body. It consists of a syringe barrel, a piston, a needle, and a protective cap. One of the characteristics of a syringe is its high precision, which can accurately control the dosage of the drug. Syringes usually have different capacities, such as 1 ml, 2 ml, 5 ml, etc., to meet the needs of different dosages. In addition, the syringe also has the characteristics of good sealing, simple operation, and easy cleaning.

[0003] When injecting liquid medicine tightly, the traditional method is to add the liquid medicine into the syringe, and then push the piston rod inside the syringe to inject the liquid medicine inside the syringe into the human body through pressure changes. However, since a large extrusion force is required to push the piston rod during injection, the piston rod may be subjected to high-intensity pressure under a large force. If the piston rod is not limited, the piston rod will deviate when it is pushed to the end of the syringe, which will increase the friction between the piston rod and the syringe when it is pushed, making it inconvenient to use the syringe. Summary of the invention

[0004] In order to overcome the existing problems, an embodiment of the present application provides a handheld disposable medication device, in which a limiting ring is sleeved on the outer wall of the piston rod, the cross-sectional diameter of the limiting ring is the same as the cross-sectional diameter of the piston head, and a through groove is opened inside the limiting ring, and the size of the through groove is the same as the cross-sectional diameter of the piston rod, so that the limiting ring can be sleeved on the outer surface of the piston rod, and when the piston rod is pushed inside the syringe housing, the limiting ring abuts against the syringe housing, which is used to limit the pushed piston rod, thereby avoiding the problem of increased friction between the piston head and the syringe due to deviation of the piston rod.

[0005] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0006] A handheld disposable medication device comprises a syringe housing and a piston rod arranged inside the syringe housing, wherein the piston rod is slidably connected to the syringe housing;

[0007] Among them, a pressure plate is provided at one end of the piston rod away from the syringe housing, and a limiting ring is slidably connected to the outer surface of the piston rod. The cross-sectional diameter of the limiting ring is the same as the cross-sectional diameter of the inner circle of the syringe housing. The limiting ring is sleeved on the outer wall of the piston rod, and the cross-sectional diameter of the limiting ring is the same as the cross-sectional diameter of the piston head. A through groove is opened inside the limiting ring, and the size of the through groove is the same as the cross-sectional size of the piston rod. At the same time, the pressure plate and the piston rod are detachable structures, and a clamping groove is provided inside the pressure plate. The depth of the clamping groove is less than the thickness of the pressure plate, and the size of the clamping groove is the same as the cross-sectional size of the piston rod. In this way, when installing the limiting ring, the pressure plate is separated from the piston rod, and the limiting ring can be clamped on the outer surface of the piston rod. When the piston rod is pushed inside the syringe housing, the limiting ring abuts against the syringe housing to limit the pushed piston rod, thereby avoiding the problem of increased friction between the piston head and the syringe housing due to deviation of the piston rod.

[0008] Preferably, a piston head is provided at one end of the piston rod away from the pressing plate, the size of the piston head is the same as the cross-sectional diameter of the inner circle of the syringe housing, and the connection between the piston head and the piston rod is detachable;

[0009] The piston head and the syringe housing are in interference connection, the piston rod is inserted into the syringe housing, and the piston rod is squeezed so that the piston head at one end of the piston rod contacts one end of the syringe housing, and then the medicine to be injected is sucked in through the injection needle, and the piston rod is pulled. When the piston rod is pulled, the medicine is sucked into the syringe housing due to the change in atmospheric pressure. When injection is needed, the pressure plate is pushed, and the piston rod enters the syringe housing under the pressure of the pressure plate, and the piston head squeezes the medicine so that the medicine can be injected from the inside of the injection needle.

[0010] Preferably, the piston rod is provided with a reinforcing plate on the outer surface of the piston head, the size of the reinforcing plate is smaller than the size of the piston rod, and there are four reinforcing plates in total, which are respectively arranged around the piston rod, and the size of the reinforcing plate is smaller than the size of the piston rod. In this way, the reinforcing plate can increase the overall strength of the piston rod and improve the service life of the piston rod.

[0011] Preferably, a slot is provided at the intersection of the pressure plate and the piston rod, the slot is plugged into the piston rod, and the size of the slot is the same as the size of one end of the piston rod;

[0012] Among them, the depth of the groove is smaller than the thickness of the pressure plate, and the connection mode between the pressure plate and the piston rod is an interference connection. A groove with the same size as the piston rod is opened at the bottom of the pressure plate. When the medicine is sucked into the inside of the syringe shell, the pressure plate is separated from the piston rod, the limit ring is taken out, the limit ring is inserted into the inside of the piston rod, and then the pressure plate is connected to the piston rod through the groove.

[0013] Preferably, a through groove is provided inside the limiting ring, and the through groove passes through the limiting ring, and the size of the through groove is the same as the size of the piston rod. The pressure plate is separated from the piston rod, and the limiting ring is taken out. A through groove that passes through the limiting ring is provided inside the limiting ring, and the size of the through groove is the same as the size of the piston rod. In this way, the limiting ring is inserted into the piston rod through the through groove, and the through groove and the piston rod can be tightly connected. Then, the pressure plate and the piston rod are connected through the card slot, and the pressure plate is pushed. The piston rod is driven into the interior of the syringe housing under the movement of the pressure plate, so that the limiting ring on the outer surface of the piston rod contacts the inner wall of the syringe housing, and the limiting ring and the syringe housing are limited to avoid the problem of deviation of the piston rod during injection.

[0014] Preferably, the syringe housing is a transparent structure, the outer surface of the syringe housing is provided with a scale, the syringe housing is provided with a limit plate at one end of the piston rod, and the syringe housing is a hollow cylindrical structure. After the piston rod is connected to the syringe housing, the piston rod is pushed and the medical staff can contact the limit plate, and the piston rod can be quickly and conveniently pushed into the syringe housing through the limit plate.

[0015] Preferably, a plug post is provided at one end of the syringe housing away from the piston rod, and the plug post is plug-connected to the connection seat, so that the injection needle is tightly connected to the syringe housing, and the injection needle is sleeved on the outer surface of the plug post;

[0016] A connecting seat is provided at the connection between the injection needle and the plug column, and a plurality of inclined plates are provided at the intersection of the connecting seat and the injection needle. The arrangement of the inclined plates can increase the stability between the connecting seat and the injection needle.

[0017] Preferably, the length of the piston rod is greater than the length of the syringe housing. When in use, the piston rod is inserted into the syringe housing and squeezed so that the piston head at one end of the piston rod contacts one end of the syringe housing. The medicine to be injected is then sucked into the syringe housing through the injection needle and the piston rod is pulled. When the piston rod is pulled, the medicine is sucked into the syringe housing due to the change in atmospheric pressure.

[0018] The advantages of the embodiments of the present application are:

[0019] 1. A limit ring is sleeved on the outer wall of the piston rod. The cross-sectional diameter of the limit ring is the same as that of the piston head. A through groove is opened inside the limit ring, and the size of the through groove is the same as the cross-sectional diameter of the piston rod. In this way, the limit ring can be sleeved on the outer surface of the piston rod. When the piston rod is pushed inside the syringe housing, the limit ring abuts against the syringe housing to limit the pushed piston rod and avoid the problem of increased friction between the piston head and the syringe due to deviation of the piston rod.

[0020] 2. A pressure plate is provided at one end of the piston rod. The pressure plate and the piston rod are detachable structures, and a groove is provided inside the pressure plate. The depth of the groove is less than the thickness of the pressure plate, and the size of the groove is the same as the cross-sectional size of the piston rod. In this way, when installing the limit ring, the pressure plate is separated from the piston rod, and the limit ring can be clamped on the outer surface of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the overall structure of the handheld disposable medication device of the present invention;

[0023] Figure 2 It is a front view structural schematic diagram of the handheld disposable medication device of the present invention;

[0024] Figure 3 This is a schematic diagram of the overall structure of the piston rod in the handheld disposable medication device of the present invention;

[0025] Figure 4 This is a schematic diagram of the overall structure of the handheld disposable medication device of the present invention without the limiting ring on the piston rod;

[0026] Figure 5 This is a schematic diagram of the overall structure of the limiting ring in the handheld disposable medication device of the present invention;

[0027] Figure 6 It is a schematic diagram of the overall structure of the injection needle in the handheld disposable medication device of the present invention;

[0028] Figure 7 This is a schematic diagram of the disassembled structure of the piston rod in the handheld disposable medication device of the present invention;

[0029] Figure 8 It is a schematic diagram of the explosion structure of the handheld disposable medication device of the present invention.

[0030] Description of main reference numerals:

[0031] 1. Syringe housing; 2. Piston rod; 3. Injection needle; 4. Press plate; 5. Limiting ring; 6. Reinforcement plate; 7. Piston head; 8. Through groove; 9. Connecting seat; 10. Card slot. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 in 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. In addition, for the convenience of description below, the referenced "up", "down", "left" and "right" are equal to the up, down, left and right directions of the drawings themselves. The "first", "second" and so on in the following text are distinguished for the description and have no other special meanings.

[0033] The embodiment of the present application solves the problems in the prior art by providing a handheld disposable medication device, wherein a limiting ring is sleeved on the outer wall of the piston rod, the cross-sectional diameter of the limiting ring is the same as the cross-sectional diameter of the piston head, and a through groove is opened inside the limiting ring, and the size of the through groove is the same as the cross-sectional size of the piston rod, so that the limiting ring can be sleeved on the outer surface of the piston rod, and when the piston rod is pushed inside the syringe housing, the limiting ring abuts against the syringe housing to limit the pushed piston rod, thereby avoiding the problem of increased friction between the piston head and the syringe caused by deviation of the piston rod; a pressure plate is provided at one end of the piston rod, the pressure plate and the piston rod are detachable structures, and a clamping groove is provided inside the pressure plate, the depth of the clamping groove is less than the thickness of the pressure plate, and the size of the clamping groove is the same as the cross-sectional size of the piston rod, so that when installing the limiting ring, the pressure plate is separated from the piston rod, and the limiting ring can be clamped on the outer surface of the piston rod.

[0034] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows:

[0035] Example 1

[0036] This embodiment provides a specific structure of a handheld disposable medication device, such as Figure 1-8 As shown, it comprises a syringe housing 1, and a piston rod 2 arranged inside the syringe housing 1, and the piston rod 2 is slidably connected to the syringe housing 1;

[0037] Among them, a pressing plate 4 is provided at the end of the piston rod 2 away from the syringe housing 1, and a limiting ring 5 is slidably connected to the outer surface of the piston rod 2. The cross-sectional diameter of the limiting ring 5 is the same as the cross-sectional diameter of the inner circle of the syringe housing 1. The limiting ring 5 is sleeved on the outer wall of the piston rod 2, and the cross-sectional diameter of the limiting ring 5 is the same as the cross-sectional diameter of the piston head 7. A through groove 8 is opened inside the limiting ring 5, and the size of the through groove 8 is the same as the cross-sectional size of the piston rod 2. At the same time, the pressing plate 4 and the piston rod 2 are detachable structures, and a clamping groove 10 is provided inside the pressing plate 4. The depth of the clamping groove 10 is less than the thickness of the pressing plate 4, and the size of the clamping groove 10 is the same as the cross-sectional size of the piston rod 2. In this way, when the limiting ring 5 is installed, the pressing plate 4 is separated from the piston rod 2, and the limiting ring 5 can be clamped on the outer surface of the piston rod 2. When the piston rod 2 is pushed inside the syringe housing 1, the limiting ring 5 abuts against the syringe housing 1, which is used to limit the pushed piston rod 2, thereby avoiding the problem of increased friction between the piston head 7 and the syringe housing 1 caused by deviation of the piston rod 2.

[0038] A through groove 8 is provided inside the limiting ring 5, and the through groove 8 penetrates the limiting ring 5, and the size of the through groove 8 is the same as the size of the piston rod 2. The pressing plate 4 is separated from the piston rod 2, and the limiting ring 5 is taken out. A through groove 8 penetrating the limiting ring 5 is provided inside the limiting ring 5, and the size of the through groove 8 is the same as the size of the piston rod 2. In this way, the limiting ring 5 is inserted into the piston rod 2 through the through groove 8, and the through groove 8 and the piston rod 2 can be tightly connected. Then, the pressing plate 4 is connected to the piston rod 2 through the card slot 10, and the pressing plate 4 is pushed. The piston rod 2 is driven into the syringe housing 1 under the movement of the pressing plate 4, so that the limiting ring 5 on the outer surface of the piston rod 2 contacts the inner wall of the syringe housing 1, and the limiting ring 5 and the syringe housing 1 are limited to avoid the problem of deviation of the piston rod 2 during injection.

[0039] By adopting the above technical solution:

[0040] A limiting ring 5 is sleeved on the outer wall of the piston rod 2, and the cross-sectional diameter of the limiting ring 5 is the same as the cross-sectional diameter of the piston head 7, and a through groove 8 is opened inside the limiting ring 5, and the size of the through groove 8 is the same as the cross-sectional size of the piston rod 2. At the same time, the pressure plate 4 and the piston rod 2 are detachable structures, and a card groove 10 is provided inside the pressure plate 4. The depth of the card groove 10 is less than the thickness of the pressure plate 4, and the size of the card groove 10 is the same as the cross-sectional size of the piston rod 2. In this way, when the limiting ring 5 is installed, the pressure plate 4 is separated from the piston rod 2, and the limiting ring 5 can be clamped on the outer surface of the piston rod 2. When the piston rod 2 is pushed inside the syringe housing 1, the limiting ring 5 abuts against the syringe housing 1, which is used to limit the pushed piston rod 2, thereby avoiding the problem of increased friction between the piston head 7 and the syringe housing 1 due to deviation of the piston rod 2.

[0041] Example 2

[0042] This embodiment provides a specific structure of a handheld disposable medication device, such as Figure 1-8 As shown, a piston head 7 is provided at one end of the piston rod 2 away from the pressing plate 4. The size of the piston head 7 is the same as the cross-sectional diameter of the inner circle of the syringe housing 1. The connection between the piston head 7 and the piston rod 2 is detachable.

[0043] Among them, the piston head 7 and the syringe housing 1 are in interference connection. The piston rod 2 is inserted into the syringe housing 1, and the piston rod 2 is squeezed so that the piston head 7 at one end of the piston rod 2 contacts one end of the syringe housing 1, and then the medicine to be injected is sucked through the injection needle 3, and the piston rod 2 is pulled. When the piston rod 2 is pulled, the medicine is sucked into the syringe housing 1 due to the change in atmospheric pressure. When injection is needed, the pressure plate 4 is pushed at this time, and the piston rod 2 enters the syringe housing 1 under the squeezing of the pressure plate 4, and the piston head 7 squeezes the medicine so that the medicine can be injected from the injection needle 3.

[0044] The piston rod 2 is provided with a reinforcing plate 6 on the outer surface of the piston head 7. The size of the reinforcing plate 6 is smaller than the size of the piston rod 2. There are four reinforcing plates 6 in total. The four reinforcing plates 6 are respectively arranged around the piston rod 2, and the size of the reinforcing plate 6 is smaller than the size of the piston rod 2. In this way, the reinforcing plate 6 can increase the overall strength of the piston rod 2 and improve the service life of the piston rod 2.

[0045] A slot 10 is provided at the intersection of the pressure plate 4 and the piston rod 2. The slot 10 is plugged into the piston rod 2. The size of the slot 10 is the same as that of one end of the piston rod 2.

[0046] Among them, the depth of the groove 10 is less than the thickness of the pressure plate 4, and the connection between the pressure plate 4 and the piston rod 2 is an interference connection. A groove 10 with the same size as the piston rod 2 is opened at the bottom of the pressure plate 4. When the medicine is sucked into the inside of the syringe housing 1, the pressure plate 4 is separated from the piston rod 2, the limit ring 5 is taken out, and the limit ring 5 is inserted into the inside of the piston rod 2, and then the pressure plate 4 is connected to the piston rod 2 through the groove 10.

[0047] The syringe housing 1 is a transparent structure, and a scale is provided on the outer surface of the syringe housing 1. A limit plate is provided at one end of the piston rod 2 of the syringe housing 1. The syringe housing 1 is a hollow cylindrical structure. After the piston rod 2 is connected to the syringe housing 1, the piston rod 2 is pushed at this time, and the medical staff can contact the limit plate. The piston rod 2 can be quickly and conveniently pushed into the syringe housing 1 through the limit plate.

[0048] An insertion post is provided at one end of the syringe housing 1 away from the piston rod 2, and the insertion post is plug-connected with the connection seat 9, so that the injection needle 3 is tightly connected to the syringe housing 1, and the injection needle 3 is sleeved on the outer surface of the insertion post;

[0049] A connecting seat 9 is provided at the connection between the injection needle 3 and the plug column, and a plurality of inclined plates are provided at the intersection of the connecting seat 9 and the injection needle 3. The arrangement of the inclined plates can increase the stability between the connecting seat 9 and the injection needle 3.

[0050] The length of the piston rod 2 is greater than the length of the syringe housing 1. When in use, the piston rod 2 is inserted into the syringe housing 1 and squeezed so that the piston head 7 at one end of the piston rod 2 contacts one end of the syringe housing 1. Then, the medicine to be injected is sucked into the syringe housing 1 through the injection needle 3 and the piston rod 2 is pulled. When the piston rod 2 is pulled, the medicine is sucked into the syringe housing 1 due to the change in atmospheric pressure.

[0051] By adopting the above technical solution:

[0052] Insert the piston rod 2 into the syringe housing 1, and squeeze the piston rod 2 so that the piston head 7 at one end of the piston rod 2 contacts one end of the syringe housing 1, then suck the medicine to be injected through the injection needle 3, and pull the piston rod 2. When the piston rod 2 is pulled, the atmospheric pressure changes, so that the medicine is sucked into the syringe housing 1. When injection is needed, the pressure plate 4 is pushed, and the piston rod 2 enters the syringe housing 1 under the pressure of the pressure plate 4. The piston head 7 squeezes the medicine, so that the medicine is injected from the injection needle 3.

[0053] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A handheld disposable medication device, characterized in that: It comprises a syringe housing (1), and a piston rod (2) arranged inside the syringe housing (1), wherein the piston rod (2) is slidably connected to the syringe housing (1); A pressure plate (4) is provided at one end of the piston rod (2) away from the syringe housing (1); the outer surface of the piston rod (2) is slidably connected to a limiting ring (5); and the cross-sectional diameter of the limiting ring (5) is the same as the cross-sectional diameter of the inner circle of the syringe housing (1).

2. A handheld disposable medication device as claimed in claim 1, characterized in that: A piston head (7) is provided at one end of the piston rod (2) away from the pressure plate (4), and the connection between the piston head (7) and the piston rod (2) is detachable; Wherein, the piston head (7) and the syringe housing (1) are in interference connection.

3. A handheld disposable medication device as claimed in claim 2, characterized in that: The piston rod (2) is provided with a reinforcing plate (6) on the outer surface of the piston head (7), and the size of the reinforcing plate (6) is smaller than the size of the piston rod (2).

4. A handheld disposable medication device as claimed in claim 1, characterized in that: A slot (10) is provided at the intersection of the pressure plate (4) and the piston rod (2), and the size of the slot (10) is the same as the size of one end of the piston rod (2); Wherein, the depth of the card slot (10) is less than the thickness of the pressing plate (4).

5. A handheld disposable medication device as claimed in claim 1, characterized in that: A through groove (8) is provided inside the limiting ring (5), and the through groove (8) penetrates the limiting ring (5). The size of the through groove (8) is the same as the size of the piston rod (2).

6. A handheld disposable medication device as claimed in claim 1, characterized in that: The syringe housing (1) is a transparent structure, the outer surface of the syringe housing (1) is provided with scales, and the syringe housing (1) is provided with a limit plate at one end of the piston rod (2).

7. A handheld disposable medication device as claimed in claim 1, characterized in that: An insertion post is provided at one end of the syringe housing (1) away from the piston rod (2), and an injection needle (3) is sleeved on the outer surface of the insertion post; Wherein, a connection seat (9) is provided at the connection point between the injection needle (3) and the plug post.

8. A handheld disposable medication device as claimed in claim 7, characterized in that: A plurality of inclined plates are provided at the intersection of the connecting seat (9) and the injection needle (3).

9. A handheld disposable medication device as claimed in claim 4, characterized in that: The connection between the pressure plate (4) and the piston rod (2) is an interference connection.

10. A handheld disposable medication device as claimed in claim 1, characterized in that: The length of the piston rod (2) is greater than the length of the syringe housing (1).

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