CN210785747U

CN210785747U - Needle mechanism and infusion device

Info

Publication number: CN210785747U
Application number: CN201921313887.4U
Authority: CN
Inventors: 郭杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-06-19
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a needle mechanism and infusion set, this needle mechanism, including needle body and holding portion, holding portion includes: the infusion tube is connected to the tail part of the rigid tube; the tail part of the needle body extends into one section of the head part of the flexible tube so that the needle body is communicated with the infusion tube by means of the flexible tube and the rigid tube; the sliding sleeve is sleeved outside the rigid tube and the flexible tube and has a first position covering the flexible tube and the rigid tube at the same time and a second position enabling at least part of the flexible tube to axially protrude out of the sliding sleeve by sliding towards the direction far away from the needle body.

Description

Needle mechanism and infusion device

Technical Field

The utility model relates to a medical instrument especially relates to needle mechanism and infusion set.

Background

The infusion needle of the infusion device is used for puncturing blood vessels under the skin of a human body so as to inject liquid medicine into the blood vessels. The infusion needle in the prior art generally comprises a needle body and a holding part, wherein the tail part of the needle body extends into the front part of the holding part, and an infusion tube is connected to the tail part of the holding part; the holding part is also provided with a handle plate for applying force by a doctor, and the head of the needle body can be penetrated into the blood vessel by applying force to the handle plate.

The needle body and the holding part in the prior art are connected in a fixed manner, i.e. after the tail of the needle body has been inserted into the holding part, a rigid connection is formed with the holding part, which results in: the needle body is liable to form a large inclination angle with the blood vessel, which is liable to cause the head portion of the needle body to penetrate the blood vessel, which is liable to occur particularly when the patient moves at the site of infusion, for example, when the needle body is stuck into the blood vessel on the back of the hand, when the wrist of the patient moves, the receiving area of the patient may carry the holding portion, which causes the needle body to penetrate the blood vessel with the holding portion being inclined in synchronization (so-called penetration is a penetration of the head portion of the needle body radially through the blood vessel).

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that exists among the prior art, the embodiment of the utility model provides a needle mechanism.

For solving the technical problem, the embodiment of the utility model adopts the following technical scheme:

a needle mechanism comprising a needle body and a holding portion, the holding portion comprising:

the infusion tube is connected to the tail part of the rigid tube;

the tail part of the needle body extends into one section of the head part of the flexible tube so that the needle body is communicated with the infusion tube by means of the flexible tube and the rigid tube;

the sliding sleeve is sleeved outside the rigid tube and the flexible tube and has a first position covering the flexible tube and the rigid tube at the same time and a second position enabling at least part of the flexible tube to axially protrude out of the sliding sleeve by sliding towards the direction far away from the needle body.

Preferably, the rigid pipe is a plastic pipe, and the flexible pipe is a rubber pipe or a silicone pipe.

Preferably, a handle plate for applying force to a human hand is arranged on the sliding sleeve.

Preferably, the tail part of the rigid pipe is provided with a baffle for the force application of a human hand.

The utility model also discloses an infusion set, including the transfer line, its characterized in that still including attach in the foretell needle mechanism of the tip of transfer line.

Compared with the prior art, the utility model discloses a needle mechanism's beneficial effect is: the utility model discloses a set up flexible tube and sliding sleeve, not only can not influence the accurate stable blood vessel of stabbing of needle body, can effectively reduce the probability that the needle body that causes because of human activity runs through blood vessel moreover.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the embodiments of the invention. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a schematic structural diagram of a needle mechanism according to an embodiment of the present invention (the sliding sleeve is in the first position).

Fig. 2 is a view from direction a of fig. 1.

Fig. 3 is a schematic structural diagram of a needle mechanism according to an embodiment of the present invention (the sliding sleeve is in the second position).

In the figure:

10-a holding portion; 11-a rigid tube; 111-a baffle; 12-a flexible tube; 13-a sliding sleeve; 131-a handle plate; 20-needle body; 30-infusion tube.

Detailed Description

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and components may be omitted.

As shown in fig. 1-3, embodiments of the present invention disclose a needle mechanism for attachment to a distal end of an infusion tube 30 of an infusion device (or infusion set). The needle mechanism includes a needle body 20 and a holding part 10, the needle body 20 is made of a thin metal tube, and the needle body 20 is used for piercing into a blood vessel under the skin of a human body.

The holding portion 10 includes a rigid tube 11, a flexible tube 12, and a sliding sleeve 13. The rigid tube 11 is made of rigid plastic, and the end of the infusion tube 30 is attached to the tail of the rigid tube 11; the flexible pipe 12 can be made of a rubber pipe or a silicone tube, the tail part of the flexible pipe 12 is inserted into the head part of the rigid pipe 11 to form sealing connection, and the flexible pipe 12 and the rigid pipe 11 can be bonded together through hot melting or can be bonded together through colloid; the tail part of the needle body 20 extends into a section of the head part of the flexible tube 12; the sliding sleeve 13 is made of hard plastics, the sliding sleeve 13 is sleeved on the flexible pipe 12 and the rigid pipe 11, the sliding sleeve 13 can slide along the axial direction of the flexible pipe 12 and the rigid pipe 11, before use, the sliding sleeve 13 covers the flexible pipe 12 and the rigid pipe 11 at the same time, and the sliding sleeve 13 is flush with the head of the flexible pipe 12 as much as possible, at this time, the axial position of the sliding sleeve 13 is not called as a first position; by applying a force to the sliding sleeve 13 in a direction away from the needle body 20, the sliding sleeve moves in a direction away from the needle body 20, which causes the flexible tube 12 to protrude from the sliding sleeve 13, and at this time, the position where the flexible tube 12 is exposed from the sliding sleeve 13 is not referred to as a second position.

The use mode of the needle mechanism is as follows:

the head of the needle body 20 is inserted into a subcutaneous blood vessel of a human body (at this time, the sliding sleeve 13 is in the first position), and after the head of the needle body 20 is inserted into the blood vessel, as shown in fig. 3, a force is applied to the sliding sleeve 13 backward to slide the sliding sleeve 13 from the first position to the second position.

The advantages of the above embodiment are:

in the process that the needle body 20 pierces a blood vessel, the sliding sleeve 13 is in the first position, and the sliding sleeve 13 covers the rigid tube 11 and the flexible tube 12 at the same time, so that the needle body 20 and the rigid tube 11 form a rigid connection state, namely, the bending relative to the rigid tube 11 is not easy to form, and the needle body 20 can be accurately and stably pierced into the blood vessel; after the needle body 20 pierces the blood vessel, as shown in fig. 3, the sliding sleeve 13 is slid to the second position, so that the flexible tube 12 is released from the constraint of the sliding sleeve 13, and at this time, the needle body 20 and the rigid tube 11 are in a flexible connection state, which can effectively reduce the following range of the needle body 20 along with the rigid tube 11, that is, when the rigid tube 11 is greatly inclined due to the movement of the human body, the inclination range of the needle body 20 is not too large, which inevitably reduces the possibility that the needle body 20 penetrates the blood vessel.

The utility model discloses a set up flexible tube 12 and sliding sleeve 13, not only can not influence the accurate stable blood vessel of stabbing of needle body 20, can effectively reduce the probability that needle body 20 caused because of human activity runs through blood vessel moreover.

In a preferred embodiment of the present invention, the sliding sleeve 13 is provided with a handle plate 131 for applying force by a human hand; the tail part of the rigid tube 11 is provided with a baffle 111 for being forced by a human hand. The handle plate 131 and the baffle 111 facilitate the hand to apply force backwards (i.e. away from the needle body 20) to the sliding sleeve 13; specifically, the thumb is used to abut against the baffle 111, and the index finger and the middle finger are used to clamp the handle plate 131 to apply force backwards, so that the sliding sleeve 13 can be conveniently moved from the first position to the second position.

The utility model also discloses an infusion device, including transfer line 30, its characterized in that still includes the foretell needle mechanism of the tip of attaching to transfer line 30.

Moreover, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or variations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. Additionally, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.

Claims

1. A needle mechanism comprising a needle body and a holding portion, characterized in that the holding portion comprises:

the infusion tube is connected to the tail part of the rigid tube;

2. The needle mechanism of claim 1 wherein the rigid tube is a plastic tube and the flexible tube is a rubber tube or a silicone tube.

3. The needle mechanism of claim 1 wherein said slider has a handle plate for applying force to a human hand.

4. The needle mechanism of claim 3 wherein the rigid tube is provided with a flap at the end thereof for manual force.

5. An infusion device comprising an infusion tube, further comprising a needle mechanism as claimed in any one of claims 1 to 4 attached to an end of the infusion tube.