Syringe with mixing cavity

Abstract

The injector with the mixing cavity comprises a main pressing circular plate, a telescopic sleeve rod, an auxiliary pressing circular plate, a connecting rod, a needle cylinder and a medicine powder cavity, the telescopic sleeve rod is connected to the lower surface of the main pressing circular plate, the connecting rod is arranged in the telescopic sleeve rod, the auxiliary pressing circular plate is connected to the upper portion of the connecting rod, the needle cylinder is arranged outside the telescopic sleeve rod in a sleeved mode, and the medicine powder cavity is formed in the needle cylinder. The syringe with the mixing cavity solves the problems that after the syringe with the mixing cavity is used, liquid medicine is left, so that resources are wasted, and the storage position of the medicine powder is unreasonable, and is reasonable in structure, the sealed mixing cavity is created between the medicine powder cavity and the main piston through upward vertical movement of the auxiliary piston, and therefore the medicine powder can be effectively mixed. The medicine powder and the liquid medicine are fully mixed, and the problem that the liquid medicine is left in the injector when the injector is used is also avoided.

Description

Technical Field

[0001] The utility model relates to a syringe with a mixing chamber, belonging to the field of syringes. Background Art

[0002] Syringes with mixing chambers are disposable syringes. They are easy to use and allow the medicine to be mixed inside the mixing chamber before injection, reducing the number of times the medicine is exposed to the air and the possibility of drug contamination to a greater extent. Powder-liquid mixing chamber syringes are more common.

[0003] Chinese patent number CN211561395U proposes a syringe with a powder-liquid mixing chamber. By dividing the boundary plate and the boundary hole inside the syringe, when the piston rod is pulled to a certain depth, the liquid medicine passes through the decomposition hole and mixes with the powder stored inside the decomposition plate. This device has the following problems: it does not conform to the actual living conditions when used, the airtightness inside the syringe is not enough, resulting in incomplete extraction of the liquid medicine, and the powder storage position is too large, which makes it easy for the powder to spill around inside the syringe when moving, causing contamination. Now there is an urgent need for a syringe with a mixing chamber to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a syringe with a mixing chamber to solve the problems raised in the above-mentioned background technology. The present invention has a reasonable structure. By making the auxiliary piston move vertically upward, a sealed mixing chamber is created between the powder chamber and the main piston, so that the powder and the liquid medicine are fully mixed, and the problem of residual liquid medicine inside the syringe during use is avoided.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solution: the present invention provides a syringe with a mixing chamber, including a main pressing circular plate, a telescopic sleeve, a secondary pressing circular plate, a connecting rod, a syringe and a powder chamber, the lower surface of the main pressing circular plate is connected to a telescopic sleeve, a connecting rod is provided inside the telescopic sleeve, a secondary pressing circular plate is connected above the connecting rod, a syringe is provided on the outside of the telescopic sleeve, and a powder chamber is connected below the syringe.

[0006] Furthermore, a main piston is connected to the lower surface of the telescopic sleeve rod, a syringe is sleeved on the outside of the main piston, and the main piston is slidably connected to the syringe.

[0007] Furthermore, a connecting rod is slidably connected inside the telescopic sleeve rod, and a secondary piston is connected below the connecting rod. The secondary piston is located above the inside of the powder chamber.

[0008] Furthermore, a limiting block is provided below the auxiliary piston, and an injection head is connected to the bottom of the powder chamber.

[0009] Furthermore, an ear plate is connected to the top of the syringe, and a mixing chamber is provided inside the syringe.

[0010] The beneficial effects of the present invention are as follows: the present invention provides a syringe with a mixing chamber, because the present invention adds a main pressing circular plate, a telescopic sleeve rod, a secondary pressing circular plate, a connecting rod, a main piston, a secondary piston and a powder chamber, the user can pull the secondary pressing circular plate to make the connecting rod connected to the secondary pressing circular plate move inside the telescopic sleeve rod, thereby driving the secondary piston to separate from the powder chamber and retract into the main piston. At this time, due to the internal seal of the needle tube, a mixing chamber is formed between the main piston and the powder chamber. Pulling the main pressing circular plate to extract the liquid medicine can mix the powder and the liquid medicine inside the mixing chamber, and pushing the main pressing circular plate can inject all the liquid medicine through the injection head. This design solves the problem of waste of resources caused by liquid medicine left over after use of the syringe with a mixing chamber and the unreasonable storage position of the powder medicine. The powder and liquid are fully mixed during use, which greatly reduces the secondary pollution of the medicine. The product has a reasonable structure, simple and convenient operation and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0012] Figure 1 This is a front view of a syringe with a mixing chamber according to the present invention;

[0013] Figure 2 This is a schematic diagram of the internal structure of a syringe with a mixing chamber according to the present invention;

[0014] Figure 3 This is a partial structural cross-sectional view of a syringe with a mixing chamber according to the present invention;

[0015] Figure 4 This is a cross-sectional view of another part of the structure of a syringe with a mixing chamber according to the present invention;

[0016] Figure 5 This is a cross-sectional view of the structure of a syringe with a mixing chamber in use according to the present invention;

[0017] In the figure: 1- auxiliary pressing circular plate, 2- connecting rod, 21- auxiliary piston, 22- limiting block, 3- main pressing circular plate, 4- telescopic sleeve, 41- main piston, 5- syringe, 6- ear plate, 7- powder chamber, 8- injection head, 9- mixing chamber. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] See also Figure 1-Figure 5 The utility model provides a technical solution: a syringe with a mixing chamber 9, comprising a main pressing circular plate 3, a telescopic sleeve rod 4, a secondary pressing circular plate 1, a connecting rod 2, a syringe 5 and a powder chamber 7. The lower surface of the main pressing circular plate 3 is connected with a telescopic sleeve rod 4, a connecting rod 2 is provided inside the telescopic sleeve rod 4, a secondary pressing circular plate 1 is connected above the connecting rod 2, a syringe 5 is provided on the outside of the telescopic sleeve rod 4, and a powder chamber 7 is connected below the syringe 5. This design solves the problems of waste of resources caused by residual liquid medicine after use of a syringe with a mixing chamber 9 and unreasonable storage position of medicine powder.

[0020] As the first embodiment of the present utility model: the lower surface of the telescopic sleeve 4 is connected with a main piston 41, the main piston 41 is made of rubber and has a smooth surface, the outer sleeve of the main piston 41 is provided with a syringe 5, the main piston 41 is slidably connected to the syringe 5, the main piston 41 is tightly fitted with the syringe 5, the inner sliding connection of the telescopic sleeve 4 is provided with a connecting rod 2, the connecting rod 2 penetrates the main piston 41 and extends downward, and a secondary piston 21 is connected to the lower part of the connecting rod 2, the secondary piston 21 is made of rubber and has a smooth surface, the secondary piston 21 is located above the inside of the powder chamber 7, and the secondary piston 21 is located above the inside of the powder chamber 7. The plug 21 fits tightly against the inner wall of the powder chamber 7. A limit block 22 is provided below the secondary piston 21. The limit block 22 is connected to the connecting rod 2. The secondary piston 21 can be disengaged from the powder chamber 7 by pulling the connecting rod 2, so that the secondary piston 21 can move in the vertical direction. An injection head 8 is connected below the powder chamber 7, and an ear plate 6 is connected above the syringe 5. Both the syringe 5 and the ear plate 6 are made of hard plastic, which is convenient for users to take. A mixing chamber 9 is provided inside the syringe 5. The mixing chamber 9 is formed by pulling the secondary pressing circular plate 1 to retract the secondary piston 21 into the inside of the main piston 41.

[0021] As a second embodiment of the present utility model: before using the device to extract the medicinal liquid, the user pulls up the auxiliary pressing circular plate 1, causing the connecting rod 2 connected to the auxiliary pressing circular plate 1 to slide upward in the telescopic sleeve 4, and the connecting rod 2 drives the auxiliary piston 21 to slide upward, and the auxiliary piston 21 disengages from the powder chamber 7, and the powder chamber 7 is no longer sealed. The auxiliary pressing circular plate 1 is continuously pulled up until the auxiliary pressing circular plate 1 is retracted into the inside of the main pressing circular plate 3. At this time, a new sealed mixing chamber 9 is formed between the powder chamber 7 and the main pressing circular plate 3. When extracting the medicinal liquid, the user can press the ear plate 6 and pull up the main pressing circular plate 3. The main pressing circular plate 3 moves upward in the vertical direction, driving the main piston 41 connected to it to move. Due to the powder inside the syringe 5, the medicinal liquid enters the mixing chamber 9 through the powder chamber 7 through the injection head 8 under atmospheric pressure. When mixing powder and liquid, the user can keep the main pressing disc 3 and the auxiliary pressing disc 1 in place and shake the syringe 5 to make the powder and liquid in the mixing chamber 9 more evenly mixed. When injecting the liquid, the user can keep the auxiliary pressing disc 1 in place and press the ear plate 6 downward to press the main pressing disc 3 until all the powder and liquid in the syringe 5 are discharged through the injection head 8.

[0022] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0023] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A syringe with a mixing chamber, comprising a main pressing disc, a telescopic sleeve, a secondary pressing disc, a connecting rod, a syringe, and a powder chamber, characterized in that: A telescopic sleeve is connected to the lower surface of the main pressing circular plate, a connecting rod is provided inside the telescopic sleeve, an auxiliary pressing circular plate is connected above the connecting rod, a syringe is sleeved outside the telescopic sleeve, and a powder chamber is connected below the syringe.

2. A syringe with a mixing chamber according to claim 1, characterized in that: A main piston is connected to the lower surface of the telescopic sleeve rod, a syringe is sleeved on the outside of the main piston, and the main piston is slidably connected to the syringe.

3. The syringe with a mixing chamber according to claim 1, characterized in that: A connecting rod is slidably connected inside the telescopic sleeve rod, and a secondary piston is connected below the connecting rod. The secondary piston is located above the inside of the powder chamber.

4. A syringe with a mixing chamber according to claim 3, characterized in that: A limiting block is provided below the auxiliary piston, and an injection head is connected to the bottom of the powder chamber.

5. The syringe with a mixing chamber according to claim 1, characterized in that: An ear plate is connected above the syringe, and a mixing chamber is provided inside the syringe.

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