CN212118681U - Body fluid collector - Google Patents

Abstract

The utility model provides a body fluid collector, the body fluid collector includes syringe, syringe needle body and valve, the syringe includes cylinder and piston rod, the cylinder chamber sliding fit of piston rod and cylinder, when the piston rod slides along the first direction relative to the cylinder, form the negative pressure in the cylinder chamber, and the piston rod can lock in order to restrict the piston rod to slide along the second direction opposite to first direction relative to the cylinder; the needle head body is connected with the needle cylinder; the valve is connected with the needle body or the needle cylinder to control the on-off between the needle body and the cylinder cavity. The collector can reduce the operation difficulty when collecting body fluid by one hand.

Description

Body fluid collector

Technical Field

The utility model relates to the field of medical equipment, particularly, relate to a body fluid collector.

Background

The body fluid collecting device includes a syringe and a needle connected to the syringe, and the body fluid is collected in the syringe by penetrating the body tissue with the needle.

Currently, after the needle is inserted into the skin, the plunger rod is pulled to force the body fluid into the syringe.

The inventor researches and discovers that the existing body fluid collecting device has the following defects:

the existing body fluid collecting device is inconvenient to operate by one hand and has poor stability during operation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a body fluid collector, its one hand is controlled the degree of difficulty and is reduced, and the nature controlled is good, improves the security.

The embodiment of the utility model is realized like this:

an embodiment provides a body fluid collector, including:

the syringe comprises a syringe barrel and a piston rod, the piston rod is in sliding fit with a barrel cavity of the syringe barrel, negative pressure is formed in the barrel cavity when the piston rod slides along a first direction relative to the syringe barrel, and the piston rod can be locked relative to the syringe barrel so as to limit the piston rod to slide along a second direction opposite to the first direction; the needle head body is connected with the needle cylinder; the valve is connected with the needle body or the needle cylinder to control the on-off between the needle body and the cylinder cavity.

In an alternative embodiment, the syringe further comprises a stopper structure by which the plunger rod is locked with respect to the barrel when the plunger rod slides in a first direction with respect to the barrel to create a negative pressure in the barrel chamber.

In an optional embodiment, the syringe comprises a syringe body and an end cover, the limiting structure comprises a sliding hole with a non-circular cross section and a limiting part arranged on the piston rod, and the piston rod passes through the sliding hole and is in sliding fit with the syringe; when the piston rod slides to the position limiting part along the first direction to be separated from the sliding hole, the piston rod is rotated to enable the position limiting part to be staggered with the sliding hole, and the position limiting part is abutted against the end cover, so that the piston rod is locked relative to the needle cylinder; the needle body is connected with the barrel body.

In alternative embodiments, the cross-sectional shape of the sliding hole is a cross, an oval or a rectangle.

In an alternative embodiment, the cross-sectional shape of the stopper is the same as the cross-sectional shape of the slide hole.

In an alternative embodiment, the needle cylinder is open at both ends along its length.

In an optional embodiment, the body fluid collector further comprises an adapter, the adapter is provided with a flow channel, and the needle body is connected with the adapter and communicated with the flow channel; the valve is arranged on the adapter and used for controlling the on-off of the flow channel; the adapter is connected with the needle cylinder.

In an alternative embodiment, the flow channel comprises a first section and a second section with a distance, the valve is provided with a through hole and a blocking part, the valve has a first position and a second position, the first position means that the through hole simultaneously communicates the first section and the second section, and the second position means that the blocking part blocks the first section and the second section; the valve is movably connected with the adapter to switch the valve between the first position and the second position.

In an alternative embodiment, the body fluid collector further comprises a reset element, which is arranged on the adapter element and is used for generating the tendency of the valve located in the first position to move to the second position.

In an alternative embodiment, the body fluid collector further comprises a connecting needle, one end of the connecting needle is connected with the adaptor and communicated with the flow channel, and the other end of the adaptor is connected with the needle cylinder.

The embodiment of the utility model has the advantages that

In conclusion, the embodiment provides a body fluid collector, and the syringe needle body is connected with the cylinder of syringe, and the valve is connected with syringe needle body or cylinder, and the valve can control the break-make between syringe needle body and the cylinder inner tube chamber. Through setting up the valve, at the in-process that uses the body fluid collector, can be as required adjusting valve's state, make the valve open or close the passageway between syringe needle body and the barrel chamber, open the back when the valve, the body fluid can enter into the barrel chamber through the syringe needle body under the effect of cylinder negative pressure, close the back when the valve, the body fluid can not enter into the barrel chamber through the syringe needle body, the one-hand operation of being convenient for, and be difficult for causing revealing of body fluid, improved the security. When the syringe is actually used, the piston rod is firstly operated to slide along a first direction, negative pressure is formed in the barrel cavity, after the piston rod slides to a set position, the piston rod is locked relative to the syringe, the piston rod cannot slide along a second direction opposite to the first direction under the action of the negative pressure, and namely a negative pressure area in the barrel cavity is kept unchanged. Before the needle body is connected with the needle cylinder, the valve is checked to adjust the valve to a closed state, then the needle body is connected with the needle cylinder, and after the valve is opened, the needle body is communicated with a cylinder cavity of the needle cylinder. When the valve is in a closed state, external fluid cannot enter the barrel cavity from the needle body, and the inside of the barrel cavity is always kept in a negative pressure state. When body fluid needs to be collected, the needle body is pierced into organism tissues, the valve is opened, and the body fluid is sucked into the barrel cavity under the action of negative pressure until the collection of the body fluid is completed. In the collection process, the valve can be closed as required to control the collection speed or terminate the collection, and the control is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a body fluid collector according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an injector according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic structural view of a syringe according to an embodiment of the present invention;

fig. 5 is a schematic view of the needle body, the valve, the adaptor and the connecting needle according to the embodiment of the present invention.

Icon:

001-body fluid collector; 100-a syringe; 110-syringe; 111-a cartridge body; 112-an end cap; 1121-sliding holes; 1122-a strip-shaped hole segment; 1123-common pore section; 1124-limit groove; 120-a piston rod; 121-a rod body; 1211-rotation segment; 122-a piston body; 123-a stopper; 200-a needle body; 300-a valve; 310-a through hole; 500-an adaptor; 510-a base; 520-a first projection; 530-a second projection; 540-a flow channel; 541-first section; 542-a second segment; 550-a chute; 600-a reset piece; 700-connecting needle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the present embodiment provides a body fluid collector 001 for collecting blood, and obviously, the body fluid collector 001 may also be used for collecting other body fluids, which is not illustrated in the present embodiment. When the body fluid collector 001 is used, the operation is convenient, and the safety is high.

The body fluid collector 001 provided by the present embodiment includes a syringe 100, a needle body 200 and a valve 300, the syringe 100 includes a cylinder 110 and a piston rod 120, the piston rod 120 is in sliding fit with a cylinder cavity of the cylinder 110, when the piston rod 120 slides along a first direction relative to the cylinder 110, negative pressure is formed in the cylinder cavity, and the piston rod 120 can be locked relative to the cylinder 110 to limit the piston rod 120 from sliding along a second direction opposite to the first direction; the needle body 200 is connected with the needle cylinder 110; valve 300 is connected to needle body 200 or barrel 110 to control the opening and closing of needle body 200 and the barrel cavity.

In the body fluid collector 001 of the present embodiment, the needle body 200 is connected to the cylinder 110 of the syringe 100, the valve 300 is connected to the needle body 200 or the cylinder 110, and the valve 300 can control the connection and disconnection between the needle body 200 and the inner cylinder cavity of the cylinder 110. Through setting up valve 300, at the in-process that uses body fluid collector 001, can be as required adjust valve 300's state, make valve 300 open or close the passageway between syringe needle body 200 and the barrel cavity, after valve 300 opened, lower body fluid can enter into the barrel cavity through syringe needle body 200 under the negative pressure effect of cylinder 110, after valve 300 closed, body fluid can not enter into the barrel cavity through syringe needle body 200, the one-hand operation of being convenient for, and difficult the revealing that causes the body fluid, the security has been improved. In actual use, the piston rod 120 is operated to slide along a first direction, negative pressure is formed in the barrel cavity, after the piston rod 120 slides to a set position, the piston rod 120 is locked relative to the barrel 110, the piston rod 120 cannot slide along a second direction opposite to the first direction under the action of the negative pressure, namely, a negative pressure area in the barrel cavity is kept unchanged. Before connecting needle body 200 with barrel 110, valve 300 is checked to adjust to a closed state, then needle body 200 is connected with barrel 110, and when valve 300 is opened, needle body 200 is communicated with the barrel cavity of barrel 110. When the valve 300 is in the closed state, external fluid cannot enter the barrel cavity from the needle body 200, and the inside of the barrel cavity is always kept in a negative pressure state. When body fluid is required to be collected, the needle body 200 is pierced into organism tissues, the valve 300 is opened, and the body fluid is sucked into the barrel cavity under the action of negative pressure until the collection of the body fluid is completed. During the collection process, the valve 300 can be closed as required to control the collection speed or terminate the collection, and the operation is convenient.

Referring to fig. 2-4, in the present embodiment, optionally, the syringe 110 is a transparent structure, so as to facilitate observation of the fluid in the chamber of the syringe 110. The syringe 110 includes a transparent barrel body 111 and a transparent end cap 112, the cross section of the barrel body 111 is circular, two ends of the barrel body 111 are both set to be open, one of the two openings is a throat, and the throat of the barrel body 111 is a strip-shaped structure along the extending direction of the barrel body 111. Be provided with the scale mark on the stack shell, be convenient for directly perceivedly acquire the liquid measure in a body 111. The end cover 112 is matched with the structure of the barrel body 111, optionally, the end cover 112 is configured to be a disk shape, a sliding hole 1121 is disposed in the middle of the end cover 112, the sliding hole 1121 penetrates through the end cover 112 in a direction perpendicular to the end cover 112, and the cross-sectional shape of the sliding hole 1121 is non-circular. Wherein a cross section of the cartridge body 111 and a cross section of the slide hole 1121 are parallel and parallel to a plane perpendicular to an axis of the cartridge body 111.

Referring to fig. 3, further, the sliding hole 1121 of the end cover 112 includes a plurality of bar-shaped hole sections 1122, each bar-shaped hole section 1122 extends in the radial direction of the end cover 112, the plurality of bar-shaped hole sections 1122 are uniformly spaced around the axis of the end cover 112, one end of the plurality of bar-shaped hole sections 1122 near the middle of the end cover 112 in the radial direction of the end cover 112 is gathered and communicated, and for convenience of description, a region where the plurality of bar-shaped hole sections 1122 are communicated in the middle of the end cover 112 is a common hole section 1123. It should be noted that the number of the strip-shaped hole segments 1122 is set as required, for example, in the present embodiment, the number of the strip-shaped hole segments 1122 is four, the four strip-shaped hole segments 1122 are uniformly arranged at intervals along the circumferential direction of the end cover 112, and an included angle between two adjacent strip-shaped hole segments 1122 is 90 degrees in the circumferential direction of the end cover 112, in other words, the four strip-shaped hole segments 1122 are arranged in a cross shape.

It is appreciated that in other embodiments, the number of strip-shaped orifice segments 1122 may not be limited to four.

It should be noted that, in other embodiments, the cross-sectional shape of the sliding hole 1121 may not be limited to a cross shape, and may also be an oval or a rectangle.

Further, a limiting groove 1124 is further disposed on an end surface of the end cover 112 away from the barrel body 111, and an included angle between the limiting groove 1124 and the strip-shaped hole section 1122 may be 45 °.

In this embodiment, the end cap 112 is connected to the barrel body 111, the end cap 112 covers the open end of the barrel body 111, and the end cap 112 and the barrel body 111 may be integrally formed or fixed by bonding, which is not limited in this embodiment.

Referring to fig. 2 and 3, in the present embodiment, optionally, the piston rod 120 includes a rod body 121 and a piston body 122, and the piston body 122 is fixed on the rod body 121. The piston body 122 is in sliding fit with the cylinder body 111, and when the piston is used, the rod body 121 is operated to drive the piston body 122 to slide relative to the cylinder body 111, and when the piston body 122 slides along the first direction, the piston body 122 and the cylinder body 111 jointly define a negative pressure cavity.

Further, the lever body 121 includes a rotation section 1211, and when the lever body 121 slides relative to the cylinder body 111 along the first direction, the rotation section 1211 can slide to a position penetrating through the sliding hole 1121, and at this time, the lever body 121 can be rotated around the axis of the lever body 121. Alternatively, the rotating section 1211 is provided as a rod having a circular outer profile in cross section.

In this embodiment, optionally, the syringe 100 further comprises a limiting structure, and when the plunger rod 120 slides in a first direction relative to the syringe 110 to generate negative pressure in the syringe cavity, the plunger rod 120 is locked in a set position relative to the syringe 110 by the limiting structure. After the piston rod 120 is locked at the set position, even under the action of the negative pressure, the piston rod 120 does not slide relative to the syringe 110 in the second direction, and the inside of the barrel cavity of the syringe 110 can be always kept in the negative pressure state.

Optionally, the limiting structure includes a sliding hole 1121 disposed on the end cover 112 and a limiting member 123 disposed on the piston rod 120, when the piston rod 120 slides relative to the cylinder body 111, the limiting member 123 is driven to slide relative to the cylinder body 111, in other words, the limiting member 123 is fixedly connected to the piston rod 120, and the limiting member 123 and the piston rod 120 are relatively fixed on the axis of the piston rod 120 and in the circumferential direction of the piston rod 120. During the sliding process of the piston rod 120, the limiting member 123 is slidably engaged with the sliding hole 1121, the limiting member 123 can slide in the first direction or the second direction relative to the sliding hole 1121, and when the lever body 121 is slid in the first direction with the rotary section 1211 thereon slid to be located within the common hole section, the position-limiting member 123 disengages from the sliding hole 1121, and at this time, the rod body 121 can drive the position-limiting member 123 to rotate around the axis of the rod body 121 relative to the cylinder body 111, so that the position-limiting member 123 is staggered with the strip-shaped hole section 1122, the position-limiting member 123 abuts against the end cap 112, and the position limiting member 123 can rotate into the position limiting groove 1124, the position limiting groove 1124 can limit the position limiting member 123 to continue rotating, the position of the piston rod 120 is more stable, at this time, even under the action of the negative pressure chamber, the piston rod 120 will not slide along the second direction, so that the piston rod 120 is locked in the locking position, and the negative pressure state is always kept in the barrel chamber of the syringe 110.

Alternatively, the limiting member 123 is configured to have a cross-shaped plate-like structure. The limiting members 123 can be in sliding fit with the four bar-shaped hole sections 1122 at the same time, and after the limiting members 123 are staggered from the bar-shaped hole sections 1122, abutting positions of the limiting members 123 and the end cover 112 are uniformly distributed, so that the force is balanced, and the end cover is not easily damaged.

Obviously, in other embodiments, the position-limiting member 123 may have other structures. Further, the cross sectional shape of the stopper 123 and the cross sectional shape of the slide hole 1121 may be set to be the same.

In addition, the stopper 123 may be integrally formed with the rod body 121 of the piston rod 120.

Referring to fig. 5, in the present embodiment, the body fluid collector 001 further includes an adaptor 500, the adaptor 500 is provided with a flow channel 540, and the needle body 200 is connected to the adaptor 500 and is communicated with the flow channel 540; the valve 300 is arranged on the adapter 500 and used for controlling the on-off of the flow channel 540; the adapter 500 is connected to the syringe 110. When valve 300 blocks flow path 540, syringe 110 and needle body 200 are blocked, and when valve 300 does not block flow path 540, syringe 110 and needle body 200 can communicate through flow path 540.

Optionally, the adaptor 500 includes a base 510, a first protrusion 520, and a second protrusion 530, the first protrusion 520 and the second protrusion 530 are both connected to the same side of the base 510, and the first protrusion 520 and the second protrusion 530 are opposite and spaced apart from each other such that the base 510, the first protrusion 520, and the second protrusion 530 together define a chute 550. Flow channel 540 includes a first section 541 extending through first lobe 520 and a second section 542 extending through second lobe 530, the axis of first section 541 being collinear with the axis of second section 542. Both the first section 541 and the second section 542 are in communication with the chute 550.

Optionally, the valve 300 is provided with a through hole 310 and a blocking portion, and the valve 300 is slidably fitted with the chute 550. Further, the valve 300 has a first position and a second position, the first position means that the through hole 310 simultaneously communicates with the first section 541 and the second section 542, and the second position means that the blocking portion blocks the first section 541 and the second section 542; the valve 300 is slidably engaged with the adapter 500 to switch the valve 300 between the first position and the second position.

Further, the body fluid collector 001 further comprises a reset element 600, wherein the reset element 600 is disposed on the adapter element 500, and is used for enabling the valve 300 located at the first position to generate a tendency to move to the second position. Optionally, the return member 600 is provided as a spring.

In this embodiment, optionally, the body fluid collector 001 further comprises a connection needle 700, one end of the connection needle 700 is connected with the adaptor 500 and communicated with the flow channel 540, and the other end of the connection needle is connected with the syringe 110. Optionally, needle body 200 is connected to first projection 520 and is in communication with first section 541, and connector needle 700 is connected to second projection 530 and is in communication with second section 542. When in use, the connecting needle 700 is inserted into the necking end of the barrel body 111, so that the connecting needle 700 is communicated with the second section 542. When body fluid is collected, the needle body 200 is inserted into a position to be extracted, and then the needle body is moved to the second position by controlling the valve 300, so that the needle cylinder 110, the connecting needle 700, the second section 542, the through hole 310, the first section 541 and the needle body 200 are sequentially communicated, and the body fluid is automatically sucked into the needle cylinder 110 by using negative pressure. Fluid collection may be stopped by depressing the valve 300 to control the flow rate or blocking the first section 541 and the second section 542.

The body fluid collector 001 provided by the embodiment reduces the difficulty of one-hand operation.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A body fluid collector, comprising:

the syringe comprises a syringe barrel and a piston rod, wherein the piston rod is in sliding fit with a barrel cavity of the syringe barrel, negative pressure is formed in the barrel cavity when the piston rod slides along a first direction relative to the syringe barrel, and the piston rod can be locked relative to the syringe barrel so as to limit the piston rod to slide along a second direction opposite to the first direction; the needle head body is connected with the needle cylinder; the valve is connected with the needle body or the needle cylinder to control the on-off of the needle body and the cylinder cavity.

2. The body fluid collector according to claim 1, wherein:

the syringe further comprises a limiting structure, and when the piston rod slides relative to the syringe in the first direction to form negative pressure in the syringe cavity, the piston rod is locked relative to the syringe through the limiting structure.

3. The body fluid collector according to claim 2, wherein:

the needle cylinder comprises a cylinder body and an end cover, the limiting structure comprises a sliding hole which is arranged on the end cover and has a non-circular cross section and a limiting part arranged on the piston rod, and the piston rod penetrates through the sliding hole and is in sliding fit with the needle cylinder; when the piston rod slides along the first direction until the limiting piece is separated from the sliding hole, the piston rod is rotated to enable the limiting piece to be staggered with the sliding hole, and the limiting piece is abutted against the end cover, so that the piston rod is locked relative to the needle cylinder; the needle body is connected with the barrel body.

4. The body fluid collector according to claim 3, wherein:

the cross section of the sliding hole is in a cross shape, an oval shape or a rectangular shape.

5. A body fluid collector according to claim 3 or 4, wherein:

the cross section shape of the limiting piece is the same as that of the sliding hole.

6. The body fluid collector according to claim 1, wherein:

both ends of the needle cylinder along the length direction are open.

7. The body fluid collector according to claim 1, wherein:

the body fluid collector also comprises an adapter, the adapter is provided with a flow channel, and the needle head body is connected with the adapter and communicated with the flow channel; the valve is arranged on the adapter piece and is used for controlling the on-off of the flow channel; the adapter is connected with the needle cylinder.

8. The body fluid collector according to claim 7, wherein:

the flow channel comprises a first section and a second section with intervals, the valve is provided with a through hole and a blocking part, the valve is provided with a first position and a second position, the first position refers to the condition that the through hole is communicated with the first section and the second section at the same time, and the second position refers to the condition that the blocking part blocks the first section and the second section; the valve is movably connected with the adapter piece so as to switch between the first position and the second position.

9. The body fluid collector according to claim 8, wherein:

the body fluid collector also comprises a resetting piece, wherein the resetting piece is arranged on the adapter piece and is used for enabling the valve positioned at the first position to generate a trend of moving to the second position.

10. A body fluid collector according to any of claims 7-9, wherein:

the body fluid collector further comprises a connecting needle, one end of the connecting needle is connected with the adaptor and communicated with the flow channel, and the other end of the connecting needle is connected with the needle cylinder.

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