CN221130627U - Safety shielding structure of injection needle and injection equipment - Google Patents

Abstract

The utility model provides a safety shielding structure of an injection needle and injection equipment, and relates to the technical field of injection instruments. The safety shielding structure of the injection needle is provided with the sliding sleeve which is in sliding connection with the needle sleeve, the safety of the injection needle in the needle sleeve during installation is ensured by the sliding sleeve, meanwhile, the locking groove arranged on the inner wall of the needle sleeve is utilized, the elastic piece drives the sliding sleeve to move upwards through the locking ring to complete the shielding of the injection needle in the needle sleeve, the sliding block on the locking ring moves along the first inclined plane on the sliding sleeve, the sliding block enters the locking groove while the locking ring rotates, at the moment, even if the sliding sleeve receives extrusion force again, the sliding block cannot drive the locking ring to move downwards through the sliding block, the elastic piece cannot be compressed, the position of the sliding sleeve is locked by the sliding block and the locking groove, the safety of the injection needle during disassembly is ensured, and in addition, the sliding sleeve is enabled to completely shield the injection needle and lock, and infection caused by secondary use of the injection needle is avoided.

Description

Safety shielding structure of injection needle and injection equipment

Technical Field

The utility model relates to the technical field of injection instruments, in particular to a safety shielding structure of an injection needle and injection equipment.

Background

The injection device is an apparatus for outputting a medical fluid using a structure such as an injection needle, wherein a pen-type injection apparatus gradually replaces a conventional injection device in some fields, such as an insulin pen-type injector for insulin injection, due to its portability and self-operability.

When using the insulin pen, it is necessary to take out the injection needle from the sterilized and sealed container, attach the injection needle to the insulin pen, perform insulin injection, and remove the disposable injection needle from the insulin pen after insulin injection is completed to perform destruction treatment. However, the needle has a sharp tip, and there is a risk of accidental injury and accidental pricks during the process of attaching and detaching the needle.

Disclosure of utility model

The utility model solves the problem of improving the safety of the injection needle in the assembling and disassembling process so as to avoid the situation of accidental injury and accidental prick.

To solve the above problems, in one aspect, the present utility model provides an injection needle safety shield structure for mounting on an insulin pen of an injection device, comprising:

The needle sleeve is of a hollow structure with an opening at the upper end, the needle sleeve is used for mounting an injection needle of the injection device, a sliding groove and a locking groove are arranged on the inner wall of the needle sleeve, the sliding groove extends along the axial direction of the needle sleeve, and the locking groove is positioned at one side of the upper end of the sliding groove and is communicated with the sliding groove;

The sliding sleeve is in sliding connection with the needle sleeve through the opening end of the needle sleeve, and the sliding sleeve is used for moving back and forth along the axial direction of the needle sleeve so as to enable the injection needle to extend out of the sliding sleeve or shield the injection needle;

The needle sleeve is internally provided with a locking ring and an elastic piece, the locking ring and the elastic piece are sequentially arranged between the sliding sleeve and the needle sleeve along the axial direction of the needle sleeve, the locking ring is used for the injection needle to pass through, the locking ring is provided with a sliding block, the sliding block is arranged in the sliding groove, the lower end of the sliding sleeve is provided with a first inclined surface, the first inclined surface winds the axial direction of the sliding sleeve, extends from the sliding groove to the locking groove and is obliquely arranged upwards, and the sliding block is propped against the first inclined surface.

Compared with the prior art, the safety shielding structure of the injection needle has the following beneficial effects: the hollow structure with the upper end open is arranged as the needle sleeve, the injection needle of the injection device can be installed in the needle sleeve, and the whole injection needle safety shielding structure can be installed on the insulin pen through the needle sleeve, so that the injection needle is communicated with the cavity for containing the medicament on the insulin pen, the medicament is conveniently output through the insulin pen through the injection needle, and the injection process is completed. A sliding sleeve is also arranged, the sliding sleeve can be in sliding connection with the needle sleeve through the opening end of the needle sleeve, the sliding sleeve can reciprocate along the axial direction of the needle sleeve, before the injection needle is used, the sharp front end of the injection needle is covered by the sliding sleeve and is positioned in an inner cavity formed by the sliding sleeve and the needle sleeve, when the needle sleeve is arranged on the insulin pen to realize the installation of the injection needle, the sliding sleeve plays a role in shielding the sharp front end of the injection needle, so that the situation of accidental injury and accidental puncture in the process of installing the injection needle is avoided, and the installation safety of the injection needle is improved; when the injection needle is used, the insulin pen is moved to generate extrusion force between the sliding sleeve and the skin entering part, the sliding sleeve moves towards the inside of the needle sleeve under the action of the extrusion force, so that the sharp front end of the injection needle extends out of the sliding sleeve, the sliding sleeve is attached to the skin entering part, the injection needle is made to penetrate into the skin entering part, and then the insulin pen outputs medicament through the injection needle to complete injection; after the injection is finished, the sliding sleeve can be moved towards the direction deviating from the inside of the needle sleeve, the injection needle is covered again, the sharp front end of the injection needle is completely arranged in the sliding sleeve, shielding of the sharp front end of the injection needle is finished again through the sliding sleeve, the situation that accidental injury and accidental prick occur in the process of disassembling and destroying the injection needle is avoided, and the installation safety of the injection needle is improved. Specifically, an elastic piece is arranged between the sliding sleeve and the needle sleeve, the sliding sleeve moves downwards under the condition that the sliding sleeve is subjected to extrusion force given by a skin entering part, the elastic piece is extruded, the elastic piece contracts, the extrusion force applied by the sliding sleeve disappears after injection is completed, the elastic piece expands, the sliding sleeve is driven to move upwards to reset, the sharp front end of an injection needle is shielded, and automatic shielding after injection is completed; on the basis, a locking ring is arranged between the sliding sleeve and the elastic piece, a sliding block is arranged on the locking ring, a sliding groove is arranged on the inner wall of the needle sleeve along the axial extension, the sliding block is arranged in the sliding groove, meanwhile, a first inclined surface is arranged at the lower end of the sliding sleeve, the first inclined surface can extend from the sliding groove to the locking groove around the axial direction of the sliding sleeve and is arranged in an upward inclined manner, the sliding block is propped against the first inclined surface, when the sliding sleeve is subjected to downward pushing force generated by the skin entering part, the sliding block is also subjected to downward pushing force generated by the first inclined surface on the sliding block, the sliding block stably moves down along the sliding groove, so that the locking ring moves down to squeeze the elastic piece, the extension and injection of the injection needle are completed, and after the extrusion force of the sliding sleeve disappears, the elastic piece is relaxed, the locking ring is given an upward thrust, the locking ring acts on the first inclined plane through the sliding block, one end of the first inclined plane, which is close to the sliding groove, is lower than one end, which is close to the locking groove, of the locking ring, after the thrust acts on the first inclined plane, the sliding sleeve can be pushed to move upwards, the shielding of the sharp front end of the injection needle is completed, the thrust has a component force along the first inclined plane, when the sliding block moves upwards to the upper end of the sliding groove, the component force can enable the sliding block to move along the first inclined plane and enter the locking groove communicated with the upper end of the sliding groove, meanwhile, the locking ring rotates around the axial direction of the needle sleeve under the driving of the sliding block, after the elastic piece is relaxed, the sliding block enters the locking groove, and the locking groove is positioned at one side of the upper end of the sliding groove, the lower part of the sliding block is provided with the limit of the bottom wall of the locking groove, the left and right directions are respectively provided with the side wall of the locking groove and the limit of the topmost end of the first inclined plane, at the moment, even if the sliding sleeve is subjected to extrusion force again, the sliding sleeve cannot drive the locking ring to move downwards through the sliding block, the elastic piece cannot be compressed, the sliding sleeve is locked by the sliding block and the locking groove, so that the situation that the injection needle stretches out again to cause stabbing caused by mistakenly pressing the sliding sleeve is avoided, the injection needle is completely shielded and locked by the sliding sleeve after being used once, and the situation that infection and the like are avoided due to secondary use of the injection needle is avoided.

Optionally, the spout includes spacing groove and groove that resets, the spacing groove with the groove that resets is all followed the axial extension setting of needle cover, the groove that resets is located the spacing groove with between the locking groove, the slider is used for arranging in the spacing inslot, the lower extreme of spacing groove with the lower extreme intercommunication of groove resets, the locking groove with the upper end intercommunication of groove resets.

Optionally, the sliding sleeve is of a hollow structure with an opening at the lower end, and the locking ring is slidably arranged in the sliding sleeve through the opening end of the sliding sleeve;

And/or the upper end face of the sliding block is provided with a second inclined plane, the second inclined plane is parallel to the first inclined plane, and the second inclined plane abuts against the first inclined plane.

Optionally, the lower terminal surface of sliding sleeve is equipped with downwardly extending's lug, first inclined plane is located on the lower terminal surface of lug, the lug orientation be equipped with the dog on the terminal surface of the inner wall of needle cover, the lower terminal surface of dog with first inclined plane looks parallel and level, the dog is used for arranging in the spout, and with the slider offsets.

Optionally, the needle cover includes needle file and containment, the needle file is used for installing the injection needle, the containment cover is established on the needle file, be equipped with first breach and second breach on the lateral wall of needle file, first breach with the inner wall cooperation of containment forms the spout, the second breach with the inner wall cooperation of containment forms the locking groove.

Optionally, be equipped with spacing breach on the lateral wall of needle file, be equipped with spacing muscle on the inner wall of containment, spacing muscle is used for arranging in the spacing breach, and with the inner wall of spacing breach is laminated mutually.

Optionally, a positioning groove is formed in the outer side wall of the needle seat in a ring shape along the circumferential direction, and a positioning rib is formed in the inner wall of the containment vessel in a ring shape along the circumferential direction and is used for being placed in the positioning groove.

Optionally, the two ends that the needle file deviates from are provided with erection column and mounting hole respectively, the erection column with the mounting hole is coaxial to be set up, the erection column is used for supplying the syringe needle penetrates the installation, the needle file is used for passing through the mounting hole is installed on the insulin pen, so that the syringe needle with the insulin pen is connected.

Optionally, the safety shielding structure of the injection needle further comprises a protective sleeve and dialysis paper, wherein the protective sleeve is a hollow structure with one end open, the needle sleeve and the sliding sleeve are used for being installed into or taken out of the protective sleeve through the open end of the protective sleeve, and the dialysis paper is used for covering and sealing the open end of the protective sleeve.

In another aspect, the utility model also comprises an injection device comprising an insulin pen, an injection needle and an injection needle safety shield structure as described above, the needle sheath of the injection needle safety shield structure being mounted on the insulin pen.

Compared with the prior art, the injection device has the same beneficial effects as the safety shielding structure of the injection needle, and the beneficial effects are not repeated here.

Drawings

FIG. 1 is a schematic view of an embodiment of the needle safety shield in an initial state;

FIG. 2 is an exploded view of a needle safety shield in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a containment vessel in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic view of a needle safety shield according to an embodiment of the present utility model in a shielded state;

Fig. 5 is a schematic view of an injection needle safety shield structure in an encapsulated state according to an embodiment of the present utility model.

Reference numerals illustrate:

1-a needle sleeve; 11-a chute; 111-limit grooves; 112-a reset slot; 12-locking grooves; 13-a needle stand; 131-a first gap; 132-a second gap; 133-limiting notch; 134-positioning grooves; 135-mounting posts; 136-mounting holes; 14-containment; 141-limit ribs; 142-positioning ribs; 143-groove separation ribs; 2-an injection needle; 3-sliding sleeve; 31-a first incline; 32-bump; 321-a stop block; 4-locking ring; 41-a slider; 411-a second ramp; 5-an elastic member; 6-protecting sleeve; 7-dialyzing paper.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the coordinate system XYZ provided herein, the forward direction of the X axis represents the right direction, the reverse direction of the X axis represents the left direction, the forward direction of the Y axis represents the rear direction, the reverse direction of the Y axis represents the front direction, the forward direction of the Z axis represents the upper direction, and the reverse direction of the Z axis represents the lower direction. Also, it is noted that the terms "first," "second," and the like in the description and claims of the present utility model and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

In one aspect, the present utility model provides an injection needle safety shield structure for mounting on an insulin pen of an injection device, comprising: the needle sleeve 1 is of a hollow structure with an opening at the upper end, the needle sleeve 1 is used for installing an injection needle 2 of injection equipment, a sliding groove 11 and a locking groove 12 are arranged on the inner wall of the needle sleeve 1, the sliding groove 11 extends along the axial direction of the needle sleeve 1, and the locking groove 12 is positioned at one side of the upper end of the sliding groove 11 and is communicated with the sliding groove 11; the sliding sleeve 3 is in sliding connection with the needle sleeve 1 through the opening end of the needle sleeve 1, and the sliding sleeve 3 is used for reciprocating along the axial direction of the needle sleeve 1 so as to enable the injection needle 2 to extend out of the sliding sleeve 3 or shield the injection needle 2; the needle sleeve 1 is internally provided with a locking ring 4 and an elastic piece 5, the locking ring 4 and the elastic piece 5 are sequentially arranged between the sliding sleeve 3 and the needle sleeve 1 along the axial direction of the needle sleeve 1, the locking ring 4 is used for the injection needle 2 to pass through, the locking ring 4 is provided with a sliding block 41, the sliding block 41 is arranged in the sliding groove 11, the lower end of the sliding sleeve 3 is provided with a first inclined surface 31, the first inclined surface 31 extends from the sliding groove 11 to the locking groove 12 around the axial direction of the sliding sleeve 3 and is arranged in an upward inclined manner, and the sliding block 41 is propped against the first inclined surface 31.

As shown in fig. 2, in this embodiment, a hollow structure with an opening at the upper end is provided as a needle sleeve 1, an injection needle 2 of an injection device can be installed in the needle sleeve 1, and the whole injection needle safety shielding structure can be installed on an insulin pen through the needle sleeve 1, so that the injection needle 2 is communicated with a cavity for containing a medicament on the insulin pen, and the medicament is conveniently output through the insulin pen through the injection needle 2, so that an injection process is completed.

As shown in fig. 1 and 2, in this embodiment, a sliding sleeve 3 is further disposed, and the sliding sleeve 3 is slidably connected with the needle sleeve 1 through an opening end of the needle sleeve 1, and the sliding sleeve 3 can reciprocate along an axial direction of the needle sleeve 1, so that before the injection needle 2 is used, a sharp front end of the injection needle 2 is covered by the sliding sleeve 3, and is located in an inner cavity formed by the sliding sleeve 3 and the needle sleeve 1, when the needle sleeve 1 is installed on an insulin pen to realize the installation of the injection needle 2, the sliding sleeve 3 plays a role in shielding the sharp front end of the injection needle 2, so that the situation of accidental injury and accidental puncture in the process of installing the injection needle 2 is avoided, and the installation safety of the injection needle 2 is improved; when the injection needle 2 is used, an insulin pen is moved to generate extrusion force between the sliding sleeve 3 and the skin entering part, the sliding sleeve 3 moves towards the inside of the needle sleeve 1 under the action of the extrusion force, so that the sharp front end of the injection needle 2 extends out of the sliding sleeve 3, the sliding sleeve 3 is attached to the skin entering part, the injection needle 2 is made to penetrate into the skin entering part, and then the insulin pen outputs medicament through the injection needle 2 to complete injection; after the injection is finished, the sliding sleeve 3 can be moved towards the direction deviating from the inside of the needle sleeve 1 to cover the injection needle 2 again, the sharp front end of the injection needle 2 is completely arranged in the sliding sleeve 3, shielding of the sharp front end of the injection needle 2 is finished again through the sliding sleeve 3, the situation that accidental injury and accidental puncture occur in the process of disassembling and destroying the injection needle 2 is avoided, and the installation safety of the injection needle 2 is improved.

Specifically, as shown in fig. 1 and 2, an elastic element 5 is arranged between the sliding sleeve 3 and the needle sleeve 1, under the condition that the sliding sleeve 3 is subjected to extrusion force given by a skin entering part, the sliding sleeve 3 moves downwards, the elastic element 5 is extruded, the elastic element 5 contracts, and after injection is completed, the extrusion force applied to the sliding sleeve 3 disappears, the elastic element 5 expands, the sliding sleeve 3 is driven to move upwards for resetting, the sharp front end of the injection needle 2 is shielded, and automatic shielding after injection is completed; on the basis, a locking ring 4 is arranged between the sliding sleeve 3 and the elastic piece 5, a sliding block 41 is arranged on the locking ring 4, a sliding groove 11 is arranged on the inner wall of the needle sleeve 1 along the axial extension, the sliding block 41 is arranged in the sliding groove 11, meanwhile, a first inclined surface 31 is arranged at the lower end of the sliding sleeve 3, the first inclined surface 31 can extend from the sliding groove 11 to the locking groove 12 around the axial direction of the sliding sleeve 3 and is upwards inclined, the sliding block 41 is propped against the first inclined surface 31, when the sliding sleeve 3 is subjected to downward pushing force of a skin entering part, the sliding block 41 is also subjected to downward pushing force generated by the first inclined surface 31 on the sliding block 41, the sliding block 41 is stably moved down along the sliding groove 11, so that the locking ring 4 moves down to squeeze the elastic piece 5, the extension and injection of the injection needle 2 are completed, after the pushing force of the sliding sleeve 3 disappears, the elastic piece 5 is relaxed, the locking ring 4 is given an upward pushing force, the locking ring 4 acts on the first inclined surface 31 through the sliding block 41, the first inclined plane 31 is lower than the end close to the locking groove 12 at one end close to the sliding groove 11, the thrust force acts on the first inclined plane 31 to push the sliding sleeve 3 to move upwards to finish shielding the sharp front end of the injection needle 2, the thrust force has a component force along the first inclined plane 31, when the sliding block 41 moves upwards to the upper end of the sliding groove 11, the component force can enable the sliding block 41 to move along the first inclined plane 31 and enter the locking groove 12 communicated with the upper end of the sliding groove 11, meanwhile, the locking ring 4 rotates around the axial direction of the needle sleeve 1 under the driving of the sliding block 41, as shown in figure 4, after the elastic piece 5 is relaxed, the sliding block 41 enters the locking groove 12, the locking groove 12 is positioned at one side of the upper end of the sliding groove 11, the bottom wall of the locking groove 12 is limited below the sliding block 41, the side wall of the locking groove 12 and the limit of the topmost end of the first inclined plane 31 are respectively arranged in the left-right direction, even the sliding sleeve 3 receives the extrusion force again at this moment, can't drive locking circle 4 through slider 41 and move down, more can't compress elastic component 5, the position of sliding sleeve 3 is locked by slider 41 and locking groove 12 to avoid the mistake to press sliding sleeve 3 to lead to injection needle 2 to stretch out again and lead to stabbing, make injection needle 2 after once using have been shielded and locked by sliding sleeve 3 completely moreover, avoid the condition such as infection to appear that secondary use injection needle 2 leads to.

In this embodiment, the width and height dimensions of the sliding groove 11 around the axial direction of the needle hub 1 and the height dimensions of the locking groove 12 may satisfy the following conditions: the height of the locking groove 12 is equal to the height of the sliding block 41, or the height of the locking groove 12 is equal to the distance between the front end of the sliding block 41 and the inner wall of the sliding sleeve 3 when the injection needle 2 is shielded, the distance of the sliding block 41 moving around the sliding groove 11 is larger than or equal to the width dimension of the sliding groove 11 around the axial direction of the needle sleeve 1 in the time of the sliding sleeve 3 completing the upward movement, and the height dimension of the sliding groove 11 is equal to the downward movement distance of the sliding sleeve 3 when the injection needle 2 is completely extended from the sliding sleeve 3.

In this embodiment, as shown in fig. 2, the first inclined surfaces 31 at the lower end of the sliding sleeve 3 have a plurality of first inclined surfaces 31, which are disposed at equal intervals around the axial direction of the sliding sleeve 3, the distance between adjacent first inclined surfaces 31 is greater than or equal to the width dimension of the locking groove 12 around the axial direction of the needle sleeve 1, correspondingly, the sliding blocks 41 on the locking ring 4 have a plurality of sliding blocks 41, and the same number as the first inclined surfaces 31, the sliding blocks 41 are disposed on the outer side wall of the locking ring 4 at equal intervals along the circumferential direction of the locking ring 4.

In the present embodiment, the elastic member 5 is a spring.

Optionally, the sliding chute 11 includes a limiting groove 111 and a reset groove 112, the limiting groove 111 and the reset groove 112 are both arranged along the axial extension of the needle sleeve 1, the reset groove 112 is located between the limiting groove 111 and the locking groove 12, the sliding block 41 is arranged in the limiting groove 111, the lower end of the limiting groove 111 is communicated with the lower end of the reset groove 112, and the locking groove 12 is communicated with the upper end of the reset groove 112.

In this embodiment, as shown in fig. 1 and fig. 4, a limiting groove 111 and a reset groove 112 are provided, which extend along the axial direction of the needle sleeve 1 to form a sliding groove 11, wherein the reset groove 112 is located between the limiting groove 111 and the locking groove 12, the sliding block 41 may be initially placed in the limiting groove 111, the lower end of the limiting groove 111 is communicated with the lower end of the reset groove 112, a groove body with an upward U-shaped opening may be formed, the locking groove 12 is communicated with the upper end of the reset groove 112, so that when the sliding block 41 is subjected to the extrusion force of the first inclined surface 31, the sliding block 41 may move down along the limiting groove 111, the downward movement stability of the locking ring 4 is ensured, the sliding sleeve 3 and the locking ring 4 are prevented from sliding relatively, on the basis, when the sliding block 41 moves to the lower end of the limiting groove 111, the limiting force, which is given by the limiting groove 111 and deviates from the direction of the reset groove 112, disappears, under the driving and guiding action of the first inclined surface 31, the sliding block 41 enters the reset groove 112, after injection is completed, the elastic piece 5 is relaxed, the sliding block 41 moves up through the guiding of the reset groove 112, and finally enters the locking groove 12 to the locking ring 3, and the locking position is completed.

Optionally, the sliding sleeve 3 is of a hollow structure with an opening at the lower end, and the locking ring 4 is slidably arranged in the sliding sleeve 3 through the opening end of the sliding sleeve 3; and/or, the upper end surface of the sliding block 41 is provided with a second inclined surface 411, the second inclined surface 411 is parallel to the first inclined surface 31, and the second inclined surface 411 abuts against the first inclined surface 31.

In this embodiment, as shown in fig. 1 and 4, the sliding sleeve 3 is set to be a hollow structure with an opening at the lower end, and the locking ring 4 is slidably mounted in the sliding sleeve 3 through the opening end of the sliding sleeve 3, so that the lateral stability of the locking ring 4 can be maintained through the sliding sleeve 3, the locking ring 4 is prevented from being laterally displaced in the moving process, in addition, the locking ring 4 can move towards the inside of the sliding sleeve 3 along the axial direction of the sliding sleeve 3 in the moving process, when the sliding block 41 moves along the first inclined plane 31, the stability of the sliding block 41 moving around the needle sleeve 1 can be ensured, the sliding block 41 can move in place once, the asynchronous up-movement and translation of the sliding block 41 at the communicating position of the limiting groove 111 and the reset groove 112 can be avoided, and the smoothness of the sliding block 41 moving between the limiting groove 111 and the reset groove 112 is ensured. In addition, when carrying out the installation of lock ring 4 and sliding sleeve 3, sliding sleeve 3 can play the positioning action to lock ring 4, guarantees the equipment precision of whole syringe needle safety shield structure.

In the embodiment of the present utility model, as shown in fig. 1, 2 and 4, the second inclined surface 411 is disposed on the upper end surface of the slider 41, and the second inclined surface 411 and the first inclined surface 31 are parallel and abut against each other, so that the contact area between the slider 41 and the first inclined surface 31 is larger during the movement of the locking ring 4 and the sliding sleeve 3, and the stability of the upward movement and the lateral movement of the slider 41 is improved.

Optionally, the lower end surface of the sliding sleeve 3 is provided with a protruding block 32 extending downward, the first inclined surface 31 is located on the lower end surface of the protruding block 32, a stop block 321 is disposed on the end surface of the protruding block 32 facing the inner wall of the needle sleeve 1, the lower end surface of the stop block 321 is level with the first inclined surface 31, and the stop block 321 is disposed in the sliding groove 11 and abuts against the sliding block 41.

In order to avoid the sliding sleeve 3 rotating in the moving process, in this embodiment, as shown in fig. 1, 2 and 4, a downward extending bump 32 is disposed on the lower end surface of the sliding sleeve 3, where the first inclined surface 31 is located on the lower end surface of the bump 32, so as to ensure that the sliding sleeve 41 abuts against the first inclined surface 31, and the end surface of the bump 32 facing the inner wall of the needle sleeve 1 is provided with a stop block 321, the lower end surface of the stop block 321 is flush with the first inclined surface 31, so that the stop block 321 is prevented from blocking the lateral movement of the sliding sleeve 41, the stop block 321 can be disposed in the sliding groove 11 and abuts against the sliding block 41, thereby realizing the movement of the sliding sleeve 3 and the locking ring 4 along the sliding groove 11, ensuring the moving stability of the sliding sleeve 3 and the locking ring 4, and simultaneously, the sliding groove 11 limits the sliding sleeve 3 through the stop block 321, so that the sliding sleeve 3 can be prevented from rotating in the moving process, and the use stability of the sliding sleeve 3 is ensured.

Optionally, the needle sleeve 1 comprises a needle seat 13 and a safety shell 14, the needle seat 13 is used for installing the injection needle 2, the safety shell 14 is sleeved on the needle seat 13, a first notch 131 and a second notch 132 are arranged on the side wall of the needle seat 13, the first notch 131 is matched with the inner wall of the safety shell 14 to form a sliding groove 11, and the second notch 132 is matched with the inner wall of the safety shell 14 to form a locking groove 12.

In this embodiment, as shown in fig. 1, 2 and 4, a needle holder 13 and a safety shell 14 are provided to form a needle sleeve 1, wherein the needle holder 13 can be provided with an injection needle 2 and can be mounted on an insulin pen to complete injection preparation work, the safety shell 14 is sleeved on the needle holder 13, a first notch 131 and a second notch 132 are arranged on the side wall of the needle holder 13, the first notch 131 is matched with the inner wall of the safety shell 14 to form a sliding groove 11, the second notch 132 is matched with the inner wall of the safety shell 14 to form a locking groove 12, and in this way, the sliding block 41 of the locking ring 4 can be firstly arranged in the first notch 131 to complete mounting and positioning, and then the safety shell 14 is sleeved on the needle holder 13 to complete the assembly of the needle sleeve 1.

In this embodiment, as shown in fig. 3, a groove dividing rib 143 extending in the axial direction is provided on the inner wall of the containment vessel 14, and the groove dividing rib 143 is located in the first notch 131, so that the chute 11 formed by matching the first notch 131 with the inner wall of the containment vessel 14 is divided into a limit groove 111 and a reset groove 112 with communicating lower ends.

Optionally, a limiting notch 133 is disposed on a side wall of the needle seat 13, and a limiting rib 141 is disposed on an inner wall of the containment vessel 14, wherein the limiting rib 141 is disposed in the limiting notch 133 and is attached to the inner wall of the limiting notch 133.

In order to avoid the rotation of the containment vessel 14, in this embodiment, as shown in fig. 2 and 3, a limiting notch 133 is disposed on a side wall of the needle seat 13, and a limiting rib 141 is disposed on an inner wall of the containment vessel 14, and the limiting rib 141 can be disposed in the limiting notch 133 and attached to the inner wall of the limiting notch 133, thereby realizing the limitation of the containment vessel 14 and avoiding the rotation of the containment vessel 14.

Optionally, a positioning groove 134 is circumferentially and annularly disposed on the outer side wall of the needle seat 13, and a positioning rib 142 is circumferentially and annularly disposed on the inner wall of the containment vessel 14, and the positioning rib 142 is configured to be placed in the positioning groove 134.

In order to avoid the vertical movement of the containment vessel 14, in this embodiment, as shown in fig. 2 and 3, a positioning groove 134 is circumferentially and annularly disposed on the outer sidewall of the needle seat 13, and a positioning rib 142 is circumferentially and annularly disposed on the inner wall of the containment vessel 14, and the positioning rib 142 can be disposed in the positioning groove 134, thereby realizing the vertical limitation of the containment vessel 14 and avoiding the vertical movement of the containment vessel 14.

Optionally, two ends of the needle seat 13 facing away from each other are respectively provided with a mounting post 135 and a mounting hole 136, the mounting posts 135 and the mounting holes 136 are coaxially arranged, the mounting posts 135 are used for penetrating and mounting the injection needle 2, and the needle seat 13 is used for being mounted on an insulin pen through the mounting holes 136 so that the injection needle 2 is connected with the insulin pen.

In order to facilitate the installation of the injection needle 2 and the connection of the needle seat 13 and the insulin pen, in this embodiment, as shown in fig. 2 and 4, two ends of the needle seat 13 facing away from each other are respectively provided with a coaxially corresponding mounting post 135 and a mounting hole 136, the mounting post 135 can be used for the injection needle 2 to penetrate and install, so that the injection needle 2 and the mounting hole 136 coaxially correspond, at this time, the lower end of the injection needle 2 is located in the mounting hole 136, the needle seat 13 can be installed on the insulin pen through the mounting hole 136, thereby the injection needle 2 is connected with the insulin pen, and the installation of the injection needle 2 is completed.

It should be noted that, in the present embodiment, the elastic member 5 is a spring, the spring may be sleeved on the mounting post 135, and the locking ring 4 is a rotary hollow structure, so that the mounting post 135 may penetrate.

Optionally, the safety shielding structure of the injection needle further comprises a protective sleeve 6 and dialysis paper 7, wherein the protective sleeve 6 is a hollow structure with one end open, the needle sleeve 1 and the sliding sleeve 3 are used for being installed into the protective sleeve 6 through the open end of the protective sleeve 6 or taken out from the protective sleeve 6, and the dialysis paper 7 is used for covering and closing the open end of the protective sleeve 6.

In this embodiment, as shown in fig. 5, in order to avoid infection of the injection needle 2 before the injection needle is not used, a protecting sleeve 6 and a dialysis paper 7 are further provided, wherein the protecting sleeve 6 is of a hollow structure with one end open, the needle sleeve 1 and the sliding sleeve 3 can be installed into the protecting sleeve 6 through the open end of the protecting sleeve 6 or taken out by the protecting sleeve 6, the dialysis paper 7 can cover and seal the open end of the protecting sleeve 6, before the injection needle is not used, the needle sleeve 1 and the sliding sleeve 3 are both positioned in the protecting sleeve 6, the open end of the protecting sleeve 6 is covered and sealed by the dialysis paper 7, so that the injection needle 2 is prevented from being infected before the injection needle is not used, and when the injection needle is required to be used, the injection needle can be taken out only by uncovering the dialysis paper 7.

In another aspect, an embodiment of the present utility model provides an injection device, including an insulin pen, an injection needle 2, and the above-mentioned injection needle safety shield structure, and a needle cover 1 of the injection needle safety shield structure is mounted on the insulin pen.

As shown in fig. 1 to 5, the technical effects of the injection device in this embodiment are similar to those of the above-mentioned needle safety shield structure, and will not be repeated here.

Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.

Claims (10)

1. An injection needle safety shield structure for mounting on an insulin pen of an injection device, comprising:

The needle sleeve (1) is of a hollow structure with an opening at the upper end, the needle sleeve (1) is used for mounting an injection needle (2) of injection equipment, a sliding groove (11) and a locking groove (12) are formed in the inner wall of the needle sleeve (1), the sliding groove (11) extends along the axial direction of the needle sleeve (1), and the locking groove (12) is located at one side of the upper end of the sliding groove (11) and is communicated with the sliding groove (11);

the sliding sleeve (3) is in sliding connection with the needle sleeve (1) through the opening end of the needle sleeve (1), and the sliding sleeve (3) is used for moving back and forth along the axial direction of the needle sleeve (1) so as to enable the injection needle (2) to extend out of the sliding sleeve (3) or shield the injection needle (2);

Be equipped with lock ring (4) and elastic component (5) in needle cover (1), lock ring (4) and elastic component (5) are followed the axial of needle cover (1) sets gradually sliding sleeve (3) with between needle cover (1), lock ring (4) supply injection needle (2) pass, be equipped with slider (41) on lock ring (4), slider (41) are used for arranging in spout (11), the lower extreme of sliding sleeve (3) is equipped with first inclined plane (31), first inclined plane (31) are around the axial of sliding sleeve (3) by spout (11) to locking groove (12) extend and upwards slope sets up, slider (41) with first inclined plane (31) offset.

2. The needle safety shield structure according to claim 1, wherein the sliding chute (11) comprises a limit groove (111) and a reset groove (112), the limit groove (111) and the reset groove (112) are arranged along the axial extension of the needle sleeve (1), the reset groove (112) is positioned between the limit groove (111) and the locking groove (12), the sliding block (41) is used for being placed in the limit groove (111), the lower end of the limit groove (111) is communicated with the lower end of the reset groove (112), and the locking groove (12) is communicated with the upper end of the reset groove (112).

3. The needle safety shield structure of claim 2, wherein,

The sliding sleeve (3) is of a hollow structure with an opening at the lower end, and the locking ring (4) is slidably arranged in the sliding sleeve (3) through the opening end of the sliding sleeve (3);

And/or, the upper end surface of the sliding block (41) is provided with a second inclined surface (411), the second inclined surface (411) is parallel to the first inclined surface (31), and the second inclined surface (411) is propped against the first inclined surface (31).

4. The safety shielding structure of the injection needle according to claim 1, wherein the lower end surface of the sliding sleeve (3) is provided with a protruding block (32) extending downwards, the first inclined surface (31) is located on the lower end surface of the protruding block (32), a stop block (321) is arranged on the end surface of the protruding block (32) facing the inner wall of the needle sleeve (1), the lower end surface of the stop block (321) is flush with the first inclined surface (31), and the stop block (321) is used for being placed in the sliding groove (11) and is propped against the sliding block (41).

5. The injection needle safety shielding structure according to any one of claims 1 to 4, wherein the needle sheath (1) comprises a needle seat (13) and a safety shell (14), the needle seat (13) is used for installing the injection needle (2), the safety shell (14) is sheathed on the needle seat (13), a first notch (131) and a second notch (132) are arranged on the side wall of the needle seat (13), the first notch (131) is matched with the inner wall of the safety shell (14) to form the sliding groove (11), and the second notch (132) is matched with the inner wall of the safety shell (14) to form the locking groove (12).

6. The safety shielding structure of the injection needle according to claim 5, wherein a limit notch (133) is provided on a side wall of the needle seat (13), a limit rib (141) is provided on an inner wall of the containment vessel (14), and the limit rib (141) is disposed in the limit notch (133) and is attached to the inner wall of the limit notch (133).

7. The safety shielding structure of the injection needle according to claim 5, wherein a positioning groove (134) is circumferentially and annularly arranged on the outer side wall of the needle seat (13), a positioning rib (142) is circumferentially and annularly arranged on the inner wall of the safety shell (14), and the positioning rib (142) is used for being placed in the positioning groove (134).

8. The safety shielding structure of an injection needle according to claim 5, wherein mounting posts (135) and mounting holes (136) are respectively arranged at two ends of the needle seat (13) facing away from each other, the mounting posts (135) and the mounting holes (136) are coaxially arranged, the mounting posts (135) are used for penetrating and mounting the injection needle (2), and the needle seat (13) is used for being mounted on the insulin pen through the mounting holes (136) so that the injection needle (2) is connected with the insulin pen.

9. The needle safety shield structure according to any one of claims 1 to 4, further comprising a protective sheath (6) and a dialysis paper (7), the protective sheath (6) being a hollow structure with one end open, the needle sheath (1) and the sliding sleeve (3) being adapted to be fitted into the protective sheath (6) through the open end of the protective sheath (6) or to be removed from the protective sheath (6), the dialysis paper (7) being adapted to cover and close the open end of the protective sheath (6).

10. An injection device, characterized by comprising an insulin pen, an injection needle (2) and an injection needle safety shield structure according to any of claims 1 to 9, the needle sheath (1) of which is mounted on the insulin pen.