CN211068471U - Disposable syringe with embedded needle - Google Patents

Abstract

The utility model relates to the technical field of injectors, in particular to a disposable injector with an embedded needle head, which comprises a needle cylinder, a needle head, a core rod and a piston, wherein the needle cylinder is provided with an injection cavity with a downward opening, the top end of the needle cylinder extends upwards to form a connecting part, the piston is fixed on the core rod and is arranged in the injection cavity in a sliding way, the top end of the core rod extends upwards to form a clamping part, the outer peripheral surface of the bottom of the needle head is provided with an external thread, and the inner peripheral wall of the connecting hole is provided with an internal thread matched with the external thread of the needle head, the utility model discloses the needle head is arranged in the injection cavity of the needle cylinder to protect the needle head, prevent the needle head from being exposed to hurt people by mistake, simultaneously prevent the needle head from being damaged by collision, and can skillfully utilize the rotating core, the needle head can be fixed, so that the needle head can be prevented from being polluted, and the injection safety is improved.

Description

Disposable syringe with embedded needle

Technical Field

The utility model belongs to the technical field of the syringe technique and specifically relates to an embedded disposable syringe of syringe needle.

Background

The injector is a medical apparatus with wide application, and is used for subcutaneous injection, intramuscular injection, intravenous injection and the like, the structure of the traditional injector mainly comprises a needle cylinder, a piston, a core bar and a needle head, and when the injector is used, the liquid medicine in the needle cylinder is ejected from the needle head by pushing the core bar and utilizing the piston on the core bar; because the syringe needle of syringe is comparatively sharp, hinder the people easily, and syringe needle self is also damaged by the collision easily, therefore, current syringe generally can set up can overlap on the syringe needle and establish the syringe needle protective sheath and protect, if the syringe needle protective sheath is established the tension on the syringe needle on the one hand, can cause easily and hardly take off the syringe needle protective sheath from the syringe needle when using, on the other hand if the syringe needle protective sheath overlap the pine of establishing on the syringe needle, can appear easily that the syringe needle protective sheath drops from the syringe needle, thereby lead to the syringe needle protective sheath to lose effect, can't protect the syringe needle.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problems that a needle head protective sleeve is sleeved on a needle head to protect the syringe in the prior art, the situation that the needle head protective sleeve is sleeved on the needle head too tightly or too loosely easily occurs, and the embedded disposable syringe with the needle head is provided.

The utility model provides a technical scheme that its technical problem adopted is: a needle embedded type disposable injector comprises a needle cylinder, a needle head, a core rod and a piston, wherein the needle cylinder is provided with an injection cavity with a downward opening, the top end of the needle cylinder extends upwards to form a connecting part, a connecting hole communicated with the injection cavity is formed in the connecting part in a penetrating manner, the piston is fixed on the core rod and is arranged in the injection cavity in a sliding manner, the top end of the core rod extends upwards to form a clamping part, the clamping part penetrates through the piston, the needle head is positioned in the injection cavity, the outer peripheral surface of the bottom of the needle head is provided with an external thread, the inner peripheral wall of the connecting hole is provided with an internal thread matched with the external thread of the needle head, a needle hole positioned above and a clamping hole positioned below are formed in the needle head, the needle hole is communicated with the clamping part, the needle head is positioned in the injection cavity, and the, the axis of the core rod is overlapped with the axis of the needle head, and the axis of the needle head is overlapped with the axis of the connecting hole.

Utilize in this scheme to embed the syringe needle in the injection chamber of cylinder to protect the syringe needle, prevent that the syringe needle from exposing the people that hurts to the mistake outside, also can prevent simultaneously that the syringe needle from being damaged by the collision, and can ingenious utilization rotates the core bar, make the syringe needle can screw and fix on the connecting portion of cylinder, realize that medical personnel need not fix the syringe needle with hand direct contact syringe needle, thereby can avoid the syringe needle to be contaminated, provide the security of injection.

Furthermore, an elastic sleeve is sleeved on the clamping portion and is clamped between the clamping portion and the clamping hole; utilize the elasticity cover to be compressed by joint part and joint hole to with joint part and joint hole chucking, with this condition that the syringe needle breaks away from on the core bar takes place when not fixed with connecting portion to prevent the syringe needle.

Furthermore, the inner wall of the elastic sleeve is provided with a limiting bulge, the outer wall of the clamping part is provided with a limiting groove matched with the limiting bulge, and the limiting bulge is embedded into the limiting groove; thereby improving the binding force of the clamping part and the elastic sleeve.

Furthermore, the elastic sleeve is made of rubber.

Furthermore, the cross section of the clamping part is square; thereby the clamping part can reliably drive the needle head to rotate.

Furthermore, a mounting hole penetrates through the piston, the core rod penetrates through the mounting hole, a fastening nut is connected to the core rod in a threaded manner, the upper end of the piston is in contact with the fastening nut, and the lower end of the piston is in contact with a step surface on the core rod.

Furthermore, a concave cavity matched with a fastening nut is formed in the upper end face of the piston, the fastening nut is located in the concave cavity, and the upper surface of the fastening nut is flush with the upper surface of the piston.

Furthermore, a protruding part extends upwards from the cavity bottom of the cavity, the mounting hole penetrates through the protruding part, the outer peripheral surface of the protruding part is a conical surface with a small upper end and a large lower end, a conical hole with a small upper end and a large lower end is formed in the lower end of the fastening nut, and the conical hole is in contact with the conical surface of the protruding part; when the fastening nut is used for locking, the conical hole of the fastening nut can press the protruding part, and the protruding part is tightly held on the core rod, so that the sealing effect between the core rod and the piston is improved.

The utility model has the advantages that: the utility model discloses an embedded disposable syringe of syringe needle utilizes and embeds the syringe needle in the injection chamber of cylinder to protect the syringe needle, prevent that the syringe needle from exposing the people that is wounded in the mistake outside, also can prevent simultaneously that the syringe needle from being damaged by the collision, and can ingenious utilization rotation core bar, make the syringe needle can screw and fix on the connecting portion of cylinder, realize that medical personnel need not use hand direct contact syringe needle, can fix the syringe needle, thereby can avoid the syringe needle to be contaminated, improve the security of injection.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of a disposable syringe with a needle embedded therein according to the present invention;

FIG. 2 is an enlarged partial schematic view of A of FIG. 1;

FIG. 3 is a schematic view showing the fixing of the needle head to the cylinder in the needle head embedded type disposable syringe of the present invention;

fig. 4 is a schematic view of the needle embedded disposable syringe of the present invention for drawing fluid.

In the figure: 1. the injection device comprises a needle cylinder, 1-1 parts of a needle cylinder, an injection cavity, 1-2 parts of a connecting part, 1-21 parts of a connecting hole, 2 parts of a needle head, 2-1 parts of a needle hole, 2-2 parts of a clamping hole, 3 parts of a core rod, 3-1 parts of a clamping part, 3-11 parts of a limiting groove, 3-2 parts of a step surface, 4 parts of a piston, 4-1 parts of a mounting hole, 4-2 parts of a concave cavity, 4-3 parts of a convex part, 5 parts of an elastic sleeve, 5-1 parts of a limiting bulge, 6 parts of a fastening nut, 6-1 parts of a conical hole.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Example 1

As shown in fig. 1-4, a needle embedded type disposable injector comprises a needle cylinder 1, aneedle 2, acore bar 3 and apiston 4, wherein the needle cylinder 1 is provided with an injection cavity 1-1 with a downward opening, the top end of the needle cylinder 1 extends upwards to form a connecting part 1-2, the connecting part 1-2 is provided with a connecting hole 1-21 communicated with the injection cavity 1-1 in a penetrating manner, thepiston 4 is fixed on thecore bar 3 and is arranged in the injection cavity 1-1 in a sliding manner, the top end of thecore bar 3 extends upwards to form a clamping part 3-1, the clamping part 3-1 penetrates through thepiston 4, theneedle 2 is positioned in the injection cavity 1-1, the outer peripheral surface of the bottom of theneedle 2 is provided with an external thread, the inner peripheral wall of the connecting hole 1-21 is provided with an internal thread matched with the external thread of theneedle 2, theneedle head 2 is internally provided with an upper needle hole 2-1 and a lower clamping hole 2-2, the needle hole 2-1 is communicated with the clamping hole 2-2, the clamping hole 2-2 is matched with a clamping part 3-1, theneedle head 2 is positioned in an injection cavity 1-1, the clamping part 3-1 of thecore rod 3 is clamped in the clamping hole 2-2, the axis of thecore rod 3 is coincided with the axis of theneedle head 2, and the axis of theneedle head 2 is coincided with the axis of the connecting hole 1-21.

The clamping part 3-1 is sleeved with anelastic sleeve 5, and theelastic sleeve 5 is clamped between the clamping part 3-1 and the clamping hole 2-2; theelastic sleeve 5 is compressed by the clamping part 3-1 and the clamping hole 2-2, so that the clamping part 3-1 and the clamping hole 2-2 are clamped, and the condition that theneedle head 2 is separated from thecore rod 3 when theneedle head 2 is not fixed with the connecting part 1-2 is prevented.

The inner wall of theelastic sleeve 5 is provided with a limiting bulge 5-1, the outer wall of the clamping part 3-1 is provided with a limiting groove 3-11 matched with the limiting bulge 5-1, and the limiting bulge 5-1 is embedded into the limiting groove 3-11; thereby improving the binding force between the clamping part 3-1 and theelastic sleeve 5.

Theelastic sleeve 5 is made of rubber.

The cross section of the clamping part 3-1 is square; thereby the clamping part 3-1 can reliably drive theneedle head 2 to rotate.

Thepiston 4 is provided with a mounting hole 4-1 in a penetrating manner, thecore bar 3 penetrates through the mounting hole 4-1, thecore bar 3 is connected with afastening nut 6 in a threaded manner, the upper end of thepiston 4 is in contact with thefastening nut 6, and the lower end of thepiston 4 is in contact with a step surface 3-2 on thecore bar 3.

The upper end face of thepiston 4 is provided with a concave cavity 4-2 matched with thefastening nut 6, thefastening nut 6 is located in the concave cavity 4-2, and the upper surface of thefastening nut 6 is flush with the upper surface of thepiston 4.

A convex part 4-3 extends upwards from the cavity bottom of the cavity 4-2, the mounting hole 4-1 penetrates through the convex part 4-3, the peripheral surface of the convex part 4-3 is a conical surface with a small upper end and a large lower end, a conical hole 6-1 with a small upper end and a large lower end is formed in the lower end of the fasteningnut 6, and the conical hole 6-1 is in contact with the conical surface of the convex part 4-3; when thefastening nut 6 is used for locking, the conical hole 6-1 of thefastening nut 6 presses the protruding part 4-3, and the protruding part 4-3 is tightly held on thecore rod 3, so that the sealing effect between thecore rod 3 and thepiston 4 is improved.

The needle head embedded type disposable injector of the embodiment has the advantages that theneedle head 2 is arranged in the injection cavity 1-1 of the needle cylinder 1, so that theneedle head 2 is protected, theneedle head 2 is prevented from being exposed to the outside to hurt people by mistake, and meanwhile, theneedle head 2 can be prevented from being damaged by collision;

when the needle is used, thecore rod 3 is pushed inwards at first, theneedle 2 penetrates through the connecting holes 1-21, the external thread at the bottom of theneedle 2 reaches the connecting part 1-2 of the needle cylinder 1, then thecore rod 3 is rotated to drive theneedle 2 to rotate together, and the external thread of theneedle 2 is screwed on the internal thread of the connecting holes 1-21, so that theneedle 2 is fixed at the front end of the needle cylinder 1; then, the clamping part 3-1 at the front end of thecore rod 3 is drawn out from the clamping hole 2-2 of theneedle head 2, and then the liquid can be drawn for injection;

after the needle is used, the clamping part 3-1 of thecore rod 3 can be inserted into the clamping hole 2-2 of theneedle 2 again, and then thecore rod 3 is rotated, so that theneedle 2 can be arranged in the injection cavity 1-1 of theneedle 2 again, and theneedle 2 is prevented from being exposed to the outside to hurt people by mistake.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (8)

1. A disposable syringe with an embedded needle head is characterized in that: the injection device comprises a needle cylinder (1), a needle head (2), a core rod (3) and a piston (4), wherein an injection cavity (1-1) with a downward opening is formed in the needle cylinder (1), a connecting part (1-2) extends upwards from the top end of the needle cylinder (1), a connecting hole (1-21) communicated with the injection cavity (1-1) penetrates through the connecting part (1-2), the piston (4) is fixed on the core rod (3) and is arranged in the injection cavity (1-1) in a sliding manner, a clamping part (3-1) extends upwards from the top end of the core rod (3), the clamping part (3-1) penetrates through the piston (4), the needle head (2) is positioned in the injection cavity (1-1), an external thread is arranged on the peripheral surface of the bottom of the needle head (2), an internal thread matched with the external thread of the needle head (2) is arranged on the inner peripheral wall of the connecting hole (1-21), the needle head (2) is internally provided with a needle hole (2-1) located above and a clamping hole (2-2) located below, the needle hole (2-1) is communicated with the clamping hole (2-2), the clamping hole (2-2) is matched with a clamping portion (3-1), the needle head (2) is located in an injection cavity (1-1), the clamping portion (3-1) of the core rod (3) is clamped in the clamping hole (2-2), the axis of the core rod (3) is coincided with the axis of the needle head (2), and the axis of the needle head (2) is coincided with the axis of the connecting hole (1-21).

2. The needle-in-line single use syringe of claim 1, wherein: the clamping portion (3-1) is sleeved with an elastic sleeve (5), and the elastic sleeve (5) is clamped between the clamping portion (3-1) and the clamping hole (2-2).

3. The needle-in-line single use syringe of claim 2, wherein: the inner wall of the elastic sleeve (5) is provided with a limiting protrusion (5-1), the outer wall of the clamping portion (3-1) is provided with a limiting groove (3-11) matched with the limiting protrusion (5-1), and the limiting protrusion (5-1) is embedded into the limiting groove (3-11).

4. The needle-in-line single use syringe of claim 2, wherein: the elastic sleeve (5) is made of rubber.

5. The needle-in-line single use syringe of claim 1, wherein: the cross section of the clamping part (3-1) is square.

6. The needle-in-line single use syringe of claim 1, wherein: the piston (4) penetrates through a mounting hole (4-1), the core rod (3) penetrates through the mounting hole (4-1), a fastening nut (6) is connected to the core rod (3) in a threaded mode, the upper end of the piston (4) is in contact with the fastening nut (6), and the lower end of the piston (4) is in contact with a step surface (3-2) on the core rod (3).

7. The needle-in-line single use syringe of claim 6, wherein: the upper end face of the piston (4) is provided with a concave cavity (4-2) matched with the fastening nut (6), the fastening nut (6) is located in the concave cavity (4-2), and the upper surface of the fastening nut (6) is flush with the upper surface of the piston (4).

8. The needle-in-line single use syringe of claim 7, wherein: the mounting structure is characterized in that a protruding portion (4-3) extends upwards from the cavity bottom of the cavity (4-2), the mounting hole (4-1) penetrates through the protruding portion (4-3), the outer peripheral surface of the protruding portion (4-3) is a conical surface with a small upper end and a large lower end, a conical hole (6-1) with a small upper end and a large lower end is formed in the lower end of the fastening nut (6), and the conical hole (6-1) is in contact with the conical surface of the protruding portion (4-3).

Images