CN220090146U - Injection syringe - Google Patents

Abstract

The utility model discloses an injector, comprising: the first cylinder is provided with a liquid storage channel penetrating along a first direction; the spray head is arranged at the first end of the liquid storage channel and can be opened and closed; the first end of the push rod is arranged in the liquid storage channel, and the push rod can move along the first direction so as to enable the first cylinder to be filled with liquid or absorb liquid; the liquid storage part is provided with a mounting cavity extending along a first direction, at least part of the first barrel body is arranged in the mounting cavity, a liquid storage cavity is defined between the outer peripheral surface of the first barrel body and the inner wall surface of the mounting cavity, a liquid inlet channel is arranged between the liquid storage cavity and the first end of the liquid storage channel, and the liquid inlet channel can be switched between a first state and a second state; when the first barrel is filled with liquid, the spray head is opened, the liquid inlet channel is in a first state, the liquid storage cavity is disconnected from the liquid storage channel, when the first barrel is used for absorbing liquid, the spray head is closed, the liquid inlet channel is in a second state, and the liquid storage cavity is communicated with the liquid storage channel.

Description

Injection syringe

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to an injector.

Background

The needleless injector does not need to use a needle head when injecting medicine, and uses a high-pressure principle, so that the medicine liquid forms a thinner injection body and instantaneously penetrates the skin to reach the subcutaneous part. However, the existing needleless injector can only perform one injection after filling, and when the same liquid medicine is injected for multiple times, the needleless injector needs to be filled with the liquid medicine for multiple times, which is time-consuming and labor-consuming and has low injection efficiency.

Disclosure of Invention

The utility model aims to provide a new technical scheme of an injector, which at least can solve the technical problem of low injection efficiency of the existing injector.

An embodiment of the present utility model provides a syringe including: the first cylinder is provided with a liquid storage channel penetrating along a first direction; the spray head is arranged at the first end of the liquid storage channel and can be opened and closed; the first end of the push rod is arranged in the liquid storage channel, and the push rod can move along the first direction so as to enable the first cylinder to be filled with liquid or absorb liquid; the liquid storage part is provided with a mounting cavity extending along the first direction, at least part of the first cylinder body is arranged in the mounting cavity, a liquid storage cavity is defined between the outer peripheral surface of the first cylinder body and the inner wall surface of the mounting cavity, a liquid inlet channel is arranged between the liquid storage cavity and the first end of the liquid storage channel, and the liquid inlet channel can be switched between a first state and a second state; when the first cylinder body is filled with liquid, the spray head is opened, the liquid inlet channel is in the first state, the liquid storage cavity is disconnected from the liquid storage channel, when the first cylinder body is used for absorbing liquid, the spray head is closed, the liquid inlet channel is in the second state, and the liquid storage cavity is communicated with the liquid storage channel.

According to the injector provided by the embodiment of the utility model, the liquid storage cavity and the liquid inlet channel in a switchable state are arranged, the liquid storage cavity can store liquid medicine, and the liquid medicine can be sucked from the liquid storage cavity through the liquid inlet channel after the liquid is injected into the first cylinder; and the liquid storage cavity is arranged on the circumferential direction of the first barrel, so that the structure is compact, the occupied space is small, and the storage and the use of a user are facilitated.

According to one embodiment of the present utility model, an end of the first barrel, which is close to the spray head, is provided with a liquid inlet hole extending along a radial direction of the first barrel, a first end of the liquid inlet hole is communicated with the liquid storage channel, a second end of the liquid inlet hole is communicated with the liquid storage cavity, the liquid inlet hole forms the liquid inlet channel, and the injector further comprises: the movable piece is arranged in the liquid inlet hole to control the closing and opening of the liquid inlet hole.

According to one embodiment of the utility model, the movable part is formed as a first one-way valve, and the first one-way valve is arranged in the liquid inlet hole.

According to one embodiment of the present utility model, the movable member is formed as an elastic arm, the elastic arm is located in the liquid storage channel, the position of the elastic arm corresponds to the position of the first end of the liquid inlet hole, the first end of the elastic arm is fixed, and the second end of the elastic arm is movable; when the liquid inlet hole is closed, the second end of the elastic arm is abutted against the inner wall surface of the liquid storage channel, and when the liquid inlet hole is opened, the second end of the elastic arm is spaced from the inner wall surface of the liquid storage channel.

According to one embodiment of the utility model, the resilient arm is formed as a tubular structure extending in the first direction, a first end of the resilient arm being connected to the spray head.

According to one embodiment of the utility model, the movable part is formed into a sphere, the sphere is positioned in the liquid inlet hole, a first end of the liquid inlet hole is provided with a limiting part extending along the radial direction of the sphere, the radial dimension of a second end of the liquid inlet hole is smaller than that of the sphere, and the sphere is movable between the limiting part and the second end of the liquid inlet hole along the axial direction of the liquid inlet hole; when the liquid inlet hole is closed, the ball body is abutted with the inner wall surface of the second end of the liquid inlet hole, and when the liquid inlet hole is opened, the ball body is spaced from the inner wall surface of the second end of the liquid inlet hole.

According to one embodiment of the utility model, the sphere is a silica gel sphere.

According to one embodiment of the utility model, the spray head comprises: the first end of the nozzle is provided with a mounting channel extending along the first direction, and the second end of the nozzle is provided with a nozzle which is communicated with the mounting channel; the second one-way valve is arranged in the installation channel and connected with the first end of the liquid storage channel, and the conducting direction of the second one-way valve faces the nozzle.

According to one embodiment of the utility model, the liquid storage piece is formed into a second cylinder extending along the first direction, the installation cavity is arranged on the inner side of the second cylinder, and the outer side surface of the second cylinder is provided with a liquid injection port communicated with the liquid storage cavity.

According to one embodiment of the present utility model, the outer side of the second cylinder is provided with a mounting hole communicated with the liquid storage cavity, and the syringe further comprises: the rubber plug is arranged in the mounting hole, the liquid injection port is arranged on the outer side face of the rubber plug, the rubber plug is provided with a slit penetrating along the axial direction of the mounting hole, and the slit is positioned in the liquid injection port.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of a syringe according to one embodiment of the utility model;

FIG. 2 is a schematic view of the internal structure of a syringe according to one embodiment of the present utility model;

fig. 3 is a schematic view showing a partial structure of a syringe when the first cylinder is suctioned according to one embodiment of the present utility model;

FIG. 4 is a schematic view of a portion of a syringe according to an embodiment of the present utility model when a first barrel is filled;

FIG. 5 is a schematic view showing an internal structure of a syringe according to another embodiment of the present utility model;

FIG. 6 is a schematic view of a partial structure of a syringe according to another embodiment of the present utility model;

fig. 7 is a schematic view showing a partial structure of the syringe when the first cylinder is suctioned according to one embodiment of the present utility model;

fig. 8 is a schematic view of a portion of a syringe according to an embodiment of the present utility model when the first barrel is filled.

Reference numerals:

a syringe 100;

a first cylinder 10; a liquid storage channel 11; a liquid inlet channel 12; a limit part 13;

a spray head 20; a nozzle 21; a spout 211; a connection hole 212; a second check valve 22;

a push rod 30;

a liquid storage member 40; a liquid storage chamber 41; a threaded connection 42;

a movable member 50;

a rubber plug 60; a liquid injection port 61; a slit 62;

and a spacer 70.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A syringe 100 according to an embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 8, a syringe 100 according to an embodiment of the present utility model includes: the spray head comprises a first barrel 10, a spray head 20, a push rod 30 and a liquid storage piece 40.

Specifically, the first cylinder 10 is provided with a liquid storage channel 11 penetrating along a first direction, the spray head 20 is arranged at a first end of the liquid storage channel 11, the spray head 20 can be opened and closed, a first end of the push rod 30 is arranged at the liquid storage channel 11, the push rod 30 can move along the first direction to enable the first cylinder 10 to be filled with liquid or absorb liquid, the liquid storage piece 40 is provided with a mounting cavity extending along the first direction, at least part of the first cylinder 10 is arranged in the mounting cavity, a liquid storage cavity 41 is defined between the outer peripheral surface of the first cylinder 10 and the inner wall surface of the mounting cavity, a liquid inlet channel 12 is arranged between the liquid storage cavity 41 and the first end of the liquid storage channel 11, and the liquid inlet channel 12 can be switched between a first state and a second state; when the first cylinder 10 is filled with liquid, the spray head 20 is opened, the liquid inlet channel 12 is in a first state, the liquid storage cavity 41 is disconnected from the liquid storage channel 11, when the first cylinder 10 is used for absorbing liquid, the spray head 20 is closed, the liquid inlet channel 12 is in a second state, and the liquid storage cavity 41 is communicated with the liquid storage channel 11.

In other words, as shown in fig. 1 to 8, the syringe 100 according to the embodiment of the present utility model is mainly composed of the first cylinder 10, the spray head 20, the push rod 30 and the liquid storage member 40, wherein the first cylinder 10 is formed in a tubular structure extending in the first direction such that the first cylinder 10 forms the liquid storage channel 11 penetrating in the first direction, the spray head 20 is connected to the first end of the liquid storage channel 11, and the spray head 20 can be opened and closed. The first end of the push rod 30 is arranged in the liquid storage channel 11, the second end of the push rod 30 extends towards a direction away from the first end of the liquid storage channel 11, the push rod 30 can move along the first direction, and the first end of the push rod 30 is attached to the inner wall surface of the liquid storage channel 11.

As shown in fig. 2 to 8, an installation cavity is provided at the inner side of the liquid storage member 40, the installation cavity extends along the first direction, a first through hole matched with the first cylinder 10 is provided at a first end of the installation cavity, a second through hole matched with the first cylinder 10 is provided at a second end of the installation cavity, the first through hole is provided at the first end of the first cylinder 10, the second through hole is provided at the second end of the first cylinder 10, the middle part of the first cylinder 10 is located in the installation cavity, a liquid storage cavity 41 is defined between the outer peripheral surface of the middle part of the first cylinder 10 and the inner wall surface of the installation cavity, and the liquid medicine can be stored through the liquid storage cavity 41.

As shown in fig. 3 to 8, a liquid inlet channel 12 is disposed between the liquid storage cavity 41 and the first end of the liquid storage channel 11, and the liquid inlet channel 12 is switchable between a first state and a second state, where the first state may be a closed state and the second state may be an on state. When the first end of the push rod 30 is close to the first end of the liquid storage channel 11, the first cylinder 10 is filled with liquid, the liquid inlet channel 12 is in a closed state, the liquid storage cavity 41 is disconnected from the liquid storage channel 11, the spray head 20 is opened, and the liquid medicine is injected into the spray head 20 and sprayed out of the spray head 20 at a high speed to finish injection; when the first end of the push rod 30 moves away from the first end of the liquid storage channel 11, the first cylinder 10 is imbibed, at this time, the spray head 20 is closed, the liquid inlet channel 12 is in a conducting state, the liquid storage cavity 41 is communicated with the liquid storage channel 11, negative pressure is generated in the liquid storage channel 11, liquid medicine is sucked into the liquid storage channel 11 from the liquid storage cavity 41, and after imbibition is completed, the liquid inlet channel 12 is closed.

It should be noted that, the push rod 30 may provide a pushing force for the push rod 30 through a compression spring, and may also provide a pushing force through adopting other driving structures, which may be selected according to actual requirements, and this embodiment will not be described again.

Therefore, according to the injector 100 of the embodiment of the utility model, by arranging the liquid storage cavity 41 and the liquid inlet channel 12 in a switchable state, the liquid storage cavity 41 can store the liquid medicine, and the liquid medicine can be sucked from the liquid storage cavity 41 through the liquid inlet channel 12 after the liquid is injected into the first cylinder 10, compared with the prior art, the injector 100 does not need to be filled with the liquid medicine for many times, and the injection efficiency and the use experience of a user can be improved; and the liquid storage cavity 41 is arranged on the circumference of the first cylinder body 10, so that the structure is compact, the occupied space is small, and the storage and the use of a user are facilitated.

In some embodiments of the present utility model, the first end of the push rod 30 is provided with a rubber stopper, and the outer circumferential surface of the rubber stopper is closely attached to the inner wall surface of the liquid storage channel 11.

According to one embodiment of the present utility model, the end of the first barrel 10 near the nozzle 20 is provided with a liquid inlet hole extending along the radial direction, a first end of the liquid inlet hole is communicated with the liquid storage channel 11, a second end of the liquid inlet hole is communicated with the liquid storage cavity 41, the liquid inlet hole forms the liquid inlet channel 12, and the injector 100 further comprises: the movable piece 50 is arranged in the liquid inlet hole to control the closing and opening of the liquid inlet hole.

That is, as shown in fig. 2 to 8, the side wall of the first end of the first cylinder 10 is provided with a liquid inlet, the first end of the liquid inlet is communicated with the liquid storage channel 11, the second end of the liquid inlet is communicated with the liquid storage cavity 41, in this embodiment, the liquid inlet can be used as the liquid inlet channel 12, the liquid inlet is provided with a movable member 50, at least part of the movable member 50 can move, so as to control the closing and opening of the liquid inlet, and the liquid storage channel 11 can be switched between the first state and the second state.

It should be noted that, the movable member 50 may be disposed at the first end of the liquid inlet or the second end of the liquid inlet or in the liquid inlet, which may be determined according to actual requirements, which is not described in detail in this embodiment.

In some embodiments of the present utility model, the movable member 50 is formed as a first check valve provided in the liquid inlet.

Specifically, a first one-way valve is disposed in the liquid inlet, and the first one-way valve can be used as the movable member 50, and the flowing direction of the first one-way valve is the direction in which the liquid storage cavity 41 flows to the liquid storage channel 11. When the first cylinder 10 is filled with liquid, the first one-way valve is automatically closed under the positive pressure in the liquid storage channel 11, so that the liquid storage channel 11 is in a first state; when the first cylinder 10 absorbs liquid, the first one-way valve is automatically opened under the negative pressure in the liquid storage channel 11, so that the liquid storage channel 11 is in the second state.

In this embodiment, the first check valve is a separately procureable component, which facilitates the production and assembly of the syringe 100, and ensures the reliability of the syringe 100.

According to one embodiment of the present utility model, the movable member 50 is formed as an elastic arm, the elastic arm is located in the liquid storage channel 11, the elastic arm corresponds to the first end of the liquid inlet, the first end of the elastic arm is fixed, and the second end of the elastic arm is movable; when the liquid inlet hole is closed, the second end of the elastic arm is abutted against the inner wall surface of the liquid storage channel 11, and when the liquid inlet hole is opened, the second end of the elastic arm is spaced from the inner wall surface of the liquid storage channel 11.

That is, as shown in fig. 2 to 4, an elastic arm extending along the first direction is disposed in the liquid storage channel 11, the elastic arm is disposed at a first end of the liquid inlet, the first end of the elastic arm is fixed in the liquid storage channel 11, and a second end of the elastic arm is movable in a radial direction of the liquid storage channel 11. When the first cylinder body 10 is filled with liquid, the second end of the elastic arm is abutted with the inner wall surface of the liquid storage channel 11 under the positive pressure in the liquid storage channel 11, so that the liquid inlet hole is closed by the elastic arm; when the first cylinder 10 absorbs liquid, the second end of the elastic arm is separated from the inner wall surface of the liquid storage channel 11 under the negative pressure in the liquid storage channel 11, so that a gap is generated between the first end of the liquid inlet hole and the elastic arm, and the liquid inlet hole communicates the liquid storage cavity 41 with the liquid storage channel 11.

Specifically, when the first cylinder 10 absorbs liquid, a gap of 0.2mm is generated between the first end of the liquid inlet hole and the elastic arm.

In some embodiments of the present utility model, the resilient arms are formed as tubular structures extending in a first direction, with a first end of the resilient arms being connected to the spray head 20.

Specifically, as shown in fig. 2 to 4, the elastic arm has a tubular structure disposed in the liquid storage channel 11, the axis of the elastic arm is the same as that of the liquid storage channel 11, the first end of the elastic arm is connected to the nozzle 20, and the second end of the elastic arm extends toward a side far away from the nozzle 20. In a normal state, the outer peripheral surface of the elastic arm is attached to the liquid storage channel 11; when the first cylinder 10 is filled with liquid, the liquid medicine in the liquid storage channel 11 generates pressure on the inner wall surface of the elastic arm, so that the outer peripheral surface of the elastic arm is abutted against the inner wall surface of the liquid storage channel 11, and the liquid inlet is closed; when the first cylinder 10 absorbs liquid, the pressure in the liquid storage channel 11 is smaller than the pressure in the liquid storage cavity 41 to form negative pressure, and the outer peripheral surface of the elastic arm and the inner wall surface of the liquid storage channel 11 generate a gap under the action of the negative pressure in the liquid storage channel 11, so that the liquid medicine can flow into the liquid storage channel 11 from the gap between the outer peripheral surface of the elastic arm and the inner wall surface of the liquid storage channel 11.

In this embodiment, the elastic arm is formed into a tubular structure, as shown in fig. 4, when the first barrel 10 is filled with liquid, the pressure of the liquid medicine in the liquid storage channel 11 acting on the elastic arm is relatively high, so that the abutting force between the elastic arm and the inner wall surface of the liquid storage channel 11 can be improved, the closing effect of the liquid inlet hole can be ensured, the liquid medicine is effectively prevented from flowing into the liquid storage cavity 41 from the liquid storage channel 11 in the liquid injection process of the first barrel 10, and the reliability of the syringe 100 is ensured.

According to one embodiment of the utility model, the movable member 50 is formed as a sphere, the sphere is located in the liquid inlet hole, the first end of the liquid inlet hole is provided with a limiting part 13 extending along the radial direction of the sphere, the radial dimension of the second end of the liquid inlet hole is smaller than the radial dimension of the sphere, and the sphere is movable between the limiting part 13 and the second end of the liquid inlet hole along the axial direction of the liquid inlet hole; when the liquid inlet is closed, the ball body is abutted with the inner wall surface of the second end of the liquid inlet, and when the liquid inlet is opened, the ball body is spaced from the inner wall surface of the second end of the liquid inlet.

That is, as shown in fig. 5 to 8, a sphere is provided in the liquid inlet hole, and the sphere is movable in the liquid inlet hole, in this example, the sphere is used as the movable member 50, the first end of the liquid inlet hole is provided with a stopper portion 13 extending in the radial direction thereof, for example, the stopper portion 13 is formed as a rod body extending in the radial direction of the liquid inlet hole, and both ends of the rod body are respectively connected with the first cylinder 10; the radial dimension of the second end of the liquid inlet is smaller than the radial dimension of the sphere, so that the sphere can move between the limiting part 13 and the second end of the liquid inlet.

It should be noted that, the limiting portion 13 may be a mesh structure besides the above structure, which may be determined according to actual requirements, and this embodiment will not be described again.

As shown in fig. 8, when the first cylinder 10 is filled with liquid, positive pressure is generated in the liquid storage channel 11, the ball moves to the second end of the liquid inlet under the action of the positive pressure, and the opening of the second end of the liquid inlet is blocked, so that the liquid inlet is closed; as shown in fig. 7, when the first cylinder 10 absorbs liquid, a negative pressure is generated in the liquid storage channel 11, and the sphere moves to the first end of the liquid inlet under the action of the negative pressure and is stopped by the limiting part 13, so that the liquid medicine can flow into the liquid storage channel 11 from the gap between the sphere and the inner wall of the liquid inlet.

In some embodiments of the utility model, the spheres are silica gel spheres.

That is, the silica gel ball can improve the closing effect of the ball on the liquid inlet, and can effectively prevent the liquid medicine in the liquid storage channel 11 from flowing into the liquid storage cavity 41 when the first cylinder 10 is filled with liquid.

According to one embodiment of the present utility model, the spray head 20 includes: the device comprises a nozzle 21 and a second one-way valve 22, wherein the first end of the nozzle 21 is provided with a mounting channel extending along a first direction, the second end of the nozzle 21 is provided with a nozzle 211, the nozzle 211 is communicated with the mounting channel, the second one-way valve 22 is arranged in the mounting channel, the second one-way valve 22 is connected with the first end of the liquid storage channel 11, and the conducting direction of the second one-way valve 22 faces the nozzle 211.

Specifically, as shown in fig. 3 to 8, the spray head 20 mainly comprises a nozzle 21 and a second one-way valve 22, wherein a first end of the nozzle 21 is provided with a mounting channel extending along a first direction, a second end of the nozzle 21 is provided with a nozzle 211 communicated with the mounting channel, the second one-way valve 22 is provided in the mounting channel, the second one-way valve 22 is connected with the first end of the liquid storage channel 11, so that a liquid inlet of the second one-way valve 22 is communicated with the first end of the liquid storage channel 11, a liquid outlet of the second one-way valve 22 faces the nozzle 211, and an axis of the liquid outlet of the second one-way valve 22 coincides with an axis of the nozzle 211, so that the liquid medicine flowing out of the second one-way valve 22 can be directly sprayed from the nozzle 211. When the first cylinder 10 absorbs liquid, the second one-way valve 22 is in a closed state, and when the first cylinder 10 injects liquid, the second one-way valve 22 is in an open state, so that the liquid medicine can flow from the second one-way valve 22 to the nozzle 211.

It should be noted that, the nozzle 20 may be a nozzle 20 with other structures in the existing injector besides the above structure, and the present utility model is not repeated.

As shown in fig. 2 and 5, in some embodiments of the present utility model, the first end of the first cylinder 10 is disposed in the mounting channel and abuts against the second check valve 22, so that the first end of the liquid storage channel 11 communicates with the second check valve 22, the nozzle 21 is provided with a connection hole 212 corresponding to the liquid inlet hole, the first end of the connection hole 212 communicates with the second end of the liquid inlet hole, the second end of the connection hole 212 communicates with the liquid storage chamber 41, and the first end of the connection hole 212 and the second end of the liquid inlet hole have the same axis.

In this embodiment, the nozzle 21 seals the portion of the liquid inlet hole, so that the opening of the second end of the liquid inlet hole is smaller than the diameter of the sphere, and therefore, when the ball is installed, the ball can be installed in the liquid inlet hole from the second end of the liquid inlet hole, so that the ball is more convenient to install.

According to one embodiment of the utility model, the resilient arm is connected to a second one-way valve 22.

That is, as shown in fig. 2 to 4, the elastic arm may be integrally formed with the second check valve 22 such that the elastic arm is formed integrally with the second check valve 22 to facilitate assembly of the syringe 100.

In some embodiments of the present utility model, the liquid storage member 40 is formed as a second cylinder extending in the first direction, the installation cavity is provided at the inner side of the second cylinder, and the outer side of the second cylinder is provided with a liquid injection port 61 communicating with the liquid storage cavity 41.

Specifically, as shown in fig. 2 to 8, the liquid storage member 40 is a second cylinder extending along a first direction, the installation cavity is arranged at the inner side of the second cylinder, a first end of the second cylinder is provided with a first installation opening communicated with the installation cavity, a first end of the nozzle 21 is inserted into the first installation opening, the nozzle 21 is in threaded connection with the second cylinder, the first cylinder 10 is positioned in the installation cavity, a first end of the first cylinder 10 is inserted into the installation channel, and the first end of the first cylinder 10 is abutted against the second one-way valve 22, so that the liquid storage channel 11 is communicated with a liquid inlet of the second one-way valve 22; the second end of the second cylinder is provided with a second mounting opening communicated with the mounting cavity, the second end of the first cylinder 10 is inserted into the second mounting opening, and the second end of the push rod 30 extends out of the second mounting opening.

As shown in fig. 1 and 2, the second end of the second cylinder is further provided with a threaded connection portion 42 extending along the first direction, and the threaded connection portion 42 can be connected by an external driving structure, so that the subsequent use is facilitated. The outer side of the second cylinder body is also provided with a liquid injection port 61 communicated with the liquid storage cavity 41, and the liquid injection port 61 can be opened and closed so as to fill the liquid storage cavity 41 with liquid medicine.

According to an embodiment of the present utility model, the outer side of the second cylinder is provided with a mounting hole communicating with the liquid storage chamber 41, and the syringe 100 further includes: the rubber plug 60, the rubber plug 60 locates the mounting hole, annotates the lateral surface that liquid mouth 61 located rubber plug 60, and the rubber plug 60 is equipped with along the slit 62 that the axial of mounting hole runs through, and slit 62 is located annotates liquid mouth 61.

That is, as shown in fig. 1 and 2, the outer side of the second cylinder is provided with a mounting hole extending in the radial direction thereof, the mounting hole communicates with the liquid storage chamber 41, a rubber plug 60 is fixedly connected in the mounting hole, the outer side of the rubber plug 60 is provided with a liquid injection port 61, the rubber plug 60 is further provided with a slit 62 penetrating in the axial direction of the mounting hole, a first end of the slit 62 faces the liquid storage chamber 41, a second end of the slit 62 faces the liquid injection port 61, and the slit 62 can be opened and closed.

When the liquid storage cavity 41 is filled with the liquid medicine, the slit 62 is in an open state, and the slit 62 communicates the liquid injection port 61 with the liquid storage cavity 41; the slit 62 is in a closed state after the liquid medicine is filled; when the air pressure in the liquid storage cavity 41 is smaller than the external air pressure, the slit 62 is in an open state, and the external air can enter the liquid storage cavity 41 from the slit 62 to balance the air pressure in the liquid storage cavity 41.

In some embodiments of the present utility model, a spacer 70 is disposed in the liquid storage chamber 41, the spacer 70 divides the liquid storage chamber 41 into two liquid storage spaces, and the two liquid storage spaces are communicated at one end of the liquid storage chamber 41 near the spray head 20.

In summary, according to the syringe 100 of the embodiment of the present utility model, by providing the liquid storage cavity 41 and the liquid inlet channel 12 in a switchable state, the liquid storage cavity 41 can store the liquid medicine, and after the liquid is injected into the first barrel 10, the liquid medicine can be sucked from the liquid storage cavity 41 through the liquid inlet channel 12, compared with the prior art, the syringe 100 does not need to be filled with the liquid medicine for many times, so that the injection efficiency and the user experience can be improved; and the liquid storage cavity 41 is arranged on the circumference of the first cylinder body 10, so that the structure is compact, the occupied space is small, and the storage and the use of a user are facilitated.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A syringe, comprising:

a first cylinder (10), wherein the first cylinder (10) is provided with a liquid storage channel (11) penetrating along a first direction;

the spray head (20) is arranged at the first end of the liquid storage channel (11), and the spray head (20) can be opened and closed;

the first end of the push rod (30) is arranged in the liquid storage channel (11), and the push rod (30) can move along the first direction so as to enable the first cylinder (10) to be filled with liquid or absorb liquid;

the liquid storage part (40), the liquid storage part (40) is provided with a mounting cavity extending along the first direction, at least part of the first cylinder body (10) is arranged in the mounting cavity, a liquid storage cavity (41) is defined between the outer peripheral surface of the first cylinder body (10) and the inner wall surface of the mounting cavity, a liquid inlet channel (12) is arranged between the liquid storage cavity (41) and the first end of the liquid storage channel (11), and the liquid inlet channel (12) can be switched between a first state and a second state;

when the first cylinder body (10) is filled with liquid, the spray head (20) is opened, the liquid inlet channel (12) is in the first state, the liquid storage cavity (41) is disconnected from the liquid storage channel (11), when the first cylinder body (10) is used for absorbing liquid, the spray head (20) is closed, the liquid inlet channel (12) is in the second state, and the liquid storage cavity (41) is communicated with the liquid storage channel (11).

2. The syringe according to claim 1, characterized in that the end of the first barrel (10) adjacent to the nozzle (20) is provided with a liquid inlet hole extending radially thereof, a first end of the liquid inlet hole being in communication with the liquid storage channel (11), a second end of the liquid inlet hole being in communication with the liquid storage chamber (41), the liquid inlet hole forming the liquid inlet channel (12), the syringe further comprising:

the movable piece (50) is arranged on the liquid inlet hole so as to control the closing and opening of the liquid inlet hole.

3. Syringe according to claim 2, characterized in that the mobile element (50) is formed as a first one-way valve provided in the inlet opening.

4. The syringe according to claim 2, characterized in that the mobile element (50) is formed as an elastic arm, which is located inside the liquid storage channel (11) and corresponds in position to the first end of the liquid inlet orifice, the first end of which is fixed, the second end of which is mobile;

when the liquid inlet hole is closed, the second end of the elastic arm is abutted against the inner wall surface of the liquid storage channel (11), and when the liquid inlet hole is opened, the second end of the elastic arm is spaced from the inner wall surface of the liquid storage channel (11).

5. The syringe of claim 4, wherein the resilient arm is formed as a tubular structure extending in the first direction, a first end of the resilient arm being connected to the nozzle head (20).

6. The syringe according to claim 2, characterized in that the movable member (50) is formed as a sphere, which sphere is located in the inlet opening, a first end of the inlet opening being provided with a stopper (13) extending radially therealong, a second end of the inlet opening having a radial dimension smaller than the radial dimension of the sphere, the sphere being movable in the axial direction of the inlet opening between the stopper (13) and the second end of the inlet opening;

when the liquid inlet hole is closed, the ball body is abutted with the inner wall surface of the second end of the liquid inlet hole, and when the liquid inlet hole is opened, the ball body is spaced from the inner wall surface of the second end of the liquid inlet hole.

7. The syringe of claim 6, wherein the sphere is a silicone sphere.

8. The injector according to claim 1, characterized in that the nozzle (20) comprises:

a nozzle (21), wherein a first end of the nozzle (21) is provided with a mounting channel extending along the first direction, a second end of the nozzle (21) is provided with a nozzle (211), and the nozzle (211) is communicated with the mounting channel;

the second one-way valve (22), second one-way valve (22) are located the installation passageway, second one-way valve (22) with the first end of stock solution passageway (11) is connected, the direction of turning on of second one-way valve (22) is towards the spout.

9. The syringe according to claim 1, characterized in that the liquid storage member (40) is formed as a second cylinder extending in the first direction, the mounting chamber is provided inside the second cylinder, and an outer side surface of the second cylinder is provided with a liquid injection port (61) communicating with the liquid storage chamber (41).

10. The syringe according to claim 9, characterized in that the outer side of the second cylinder is provided with a mounting hole communicating with the liquid storage chamber (41), the syringe further comprising:

the rubber plug (60), the rubber plug (60) is located the mounting hole, annotate liquid mouth (61) and locate the lateral surface of rubber plug (60), rubber plug (60) are equipped with along mounting hole's axial run-through slit (62), slit (62) are located annotate liquid mouth (61).