Disposable pen type syringe

Abstract

The utility model provides a disposable pen type syringe which comprises a syringe body, a needle head is fixedly connected to the top end of the syringe body, a multi-stage telescopic assembly is nested outside the needle head, and a limiting assembly for preventing the multi-stage telescopic assembly from freely moving is fixedly connected to the position, close to the bottom end, of the multi-stage telescopic assembly. A plurality of inserting holes matched with the limiting assembly are formed in the side wall of the injector body, a sliding groove matched with the limiting assembly is further formed in the position, close to the needle head, of the injector body, the exposed length of the needle head is adjusted through the multi-stage telescopic assembly according to the body type of a patient, and the multi-stage telescopic assembly is limited through the limiting assembly. The multi-stage telescopic assembly is prevented from moving freely, the needle head is fixed to the top end of the syringe body, the operation steps of the syringe are simplified, and the customer experience is optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to syringe technical field especially relates to a disposable pen type syringe. BACKGROUND

[0002] The disposable pen type syringe is a kind of medical equipment specially designed for self-administration, usually used for subcutaneous or intramuscular injection of medicine, it is designed to be similar to the shape and size of pen, therefore named "pen type", the syringe of this type is preloaded with specific dose of medicine, usually insulin or biological preparation required for treating chronic diseases such as diabetes, multiple sclerosis, rheumatoid arthritis etc.

[0003] The syringe body and needle of the existing disposable pen type syringe are generally designed as split type, and the needle is designed with multiple lengths according to the body type of patient, when the patient needs to inject liquid medicine, the needle is clamped on the liquid outlet of syringe body, and then used.

[0004] Therefore, it is necessary to provide a new disposable pen type syringe to solve the above technical problems. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides a kind of disposable pen type syringe.

[0006] The disposable pen type syringe provided by the utility model includes: a syringe body, the top end of the syringe body is fixedly connected with a needle, the needle is externally nested with a multi-stage telescopic assembly, the multi-stage telescopic assembly is fixedly connected with a limiting assembly adjacent to the bottom end, the limiting assembly prevents the multi-stage telescopic assembly from freely moving, a plurality of plug-in holes matched with the limiting assembly are formed in the side wall of the syringe body, and a sliding groove matched with the limiting assembly is also formed in the syringe body adjacent to the needle.

[0007] Preferably, the multi-stage telescopic assembly includes a shell, a lifting member is threadedly connected in the shell, a threaded rod is threadedly connected in the lifting member, a through hole is formed in the threaded rod, the needle passes through the through hole, and the bottom end of the threaded rod is fixedly connected to the center of the top end of the syringe body.

[0008] Preferably, the lifting member includes a first sleeve, the first sleeve is slidingly connected to the inner side wall of the shell, the bottom end of the first sleeve is threadedly connected with the threaded rod, a first threaded sleeve is movably connected in the first sleeve, and the first sleeve limits the first threaded sleeve adjacent to the bottom end, a second sleeve is threadedly connected outside the first threaded sleeve, a second threaded sleeve is movably connected in the second sleeve, an abutting block is threadedly connected outside the second threaded sleeve, the abutting block is slidingly connected with the second sleeve, and the first sleeve is slidingly connected with the shell and the second sleeve respectively.

[0009] Preferably, the limiting component includes a mounting frame, the side wall of which has a plurality of mounting slots, each mounting slot corresponding to a plurality of insertion holes, and each mounting slot has an elastic element installed therein, one end of which is fixedly connected to the side wall of the mounting slot, and the other end of which is attached to the side wall of the insertion hole.

[0010] Preferably, the elastic element includes a spring, one end of which is fixedly connected to the side wall of the mounting groove, and the other end of the spring is provided with a plug-in block, which is inserted into the plug-in hole.

[0011] Preferably, all of the plurality of insertion holes are hemispherical slots, all of the plurality of insertion blocks are spherical and fit into the insertion holes, and the vertical cross-section of any segment of the sliding groove is semi-circular.

[0012] Preferably, the plurality of insertion holes and the plurality of insertion blocks are arranged circumferentially about the central axis of the mounting housing.

[0013] Preferably, the groove is an annular groove, and the vertical cross-section of any segment of the groove is semi-circular.

[0014] Preferably, the diameters of the plug-in block and the mounting groove are both larger than the diameters of the plug-in hole and the sliding groove.

[0015] Preferably, the syringe body has a display screen on its side wall and a knob for adjusting the dosage at its tail end.

[0016] Compared with related technologies, the disposable pen-type syringe provided by this utility model has the following beneficial effects:

[0017] This invention provides a disposable pen-type syringe. In practice, a multi-stage telescopic component is used to adjust the length of the exposed needle according to the patient's body shape. A limiting component is used to limit the multi-stage telescopic component to prevent it from moving freely. The needle is fixed to the top of the syringe body, which simplifies the operation of the syringe and optimizes the customer experience. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the disposable pen-type syringe provided by this utility model;

[0019] Figure 2 A top view of the disposable pen-type syringe provided by this utility model;

[0020] Figure 3 for Figure 2 The cross-sectional view at point AA is shown below.

[0021] Figure 4 for Figure 3 Enlarged view of point a shown;

[0022] Figure 5 The utility model provides a disposable pen type syringe's syringe main part drawing.

[0023] The figure mark: 1, syringe main body; 2, needle; 3, multistage telescopic component; 31, shell; 32, lifting component; 321, first sleeve; 322, second sleeve; 323, first threaded sleeve; 324, second threaded sleeve; 325, abutment block; 33, threaded rod; 4, limiting component; 41, mounting frame; 42, mounting groove; 43, elastic piece; 431, spring; 432, plug-in block; 5, plug-in hole. DETAILED DESCRIPTION

[0024] The utility model will be further explained below in connection with the drawings and embodiment.

[0025] Please combine with reference to Figure 1 — Figure 5 Among them, Figure 1 It is the overall structure schematic diagram of disposable pen type syringe provided by the utility model; Figure 2 It is the top view of disposable pen type syringe provided by the utility model; Figure 3 It is Figure 2 The section view of A-A shown in the figure; Figure 4 It is Figure 3 The enlarged view of a shown in the figure; Figure 5 It is the syringe main part drawing of disposable pen type syringe provided by the utility model.

[0026] In the specific implementation process, a kind of disposable pen type syringe, structure as Figure 1 — Figure 5 Shown, including: syringe main body 1, syringe main body 1 top end fixedly connected with needle 2, needle 2 outer nest has multistage telescopic component 3, multistage telescopic component 3 adjacent bottom end fixedly connected with limiting component 4 that prevents multistage telescopic component 3 free activity, syringe main body 1 side wall is equipped with multiple with limiting component 4 matched plug-in hole 5, syringe main body 1 adjacent needle 2 place is also equipped with with limiting component 4 matched sliding slot 6;

[0027] It needs to be explained that, syringe main body 1 can adopt nordno and insulin pen, nordno and insulin pen not only can be shown through knob and display screen cooperation, display injection medicament's dosage, also can make the sound when the patient with impaired vision or blindness is discerned through the rotation of the dosage knob inside this insulin pen to distinguish the dosage of liquid medicine, simultaneously nordno and insulin pen can show last time's insulin injection information, can help patient to avoid the problem of omission or repeated injection caused by forgetting whether it has been injected, to reduce the risk of hypoglycemia.

[0028] The multi-stage telescopic assembly 3 comprises a shell 31, a lifting member 32 is threadedly connected in the shell 31, a threaded rod 33 is threadedly connected in the lifting member 32, the lifting member 32 comprises a first sleeve 321, the first sleeve 321 is slidingly connected to the inner side wall of the shell 31, the first sleeve 321 is threadedly connected with the threaded rod 33 at the bottom end, a first threaded sleeve 323 is movably connected in the first sleeve 321, the first threaded sleeve 323 is limited by the first sleeve 321 adjacent to the bottom end, a second sleeve 322 is threadedly connected with the first threaded sleeve 323, a second threaded sleeve 324 is movably connected in the second sleeve 322, an abutting block 325 is threadedly connected with the second threaded sleeve 324, the abutting block 325 is slidingly connected with the second sleeve 322, the first threaded sleeve 323, the second threaded sleeve 324 and the threaded rod 33 are all slidingly connected, the first sleeve 321 is slidingly connected with the shell 31 and the second sleeve 322 respectively, a through hole is formed in the threaded rod 33, the needle 2 passes through the through hole, the threaded rod 33 is fixedly connected with the center of the top end of the syringe body 1, by rotating the shell 31, the shell 31 drives the first sleeve 321 to rotate, the first sleeve 321 is threadedly connected with the threaded rod 33, so that the first sleeve 321 rises, the first sleeve 321 drives the first threaded sleeve 323 to rise at the same time, the first sleeve 321 drives the second sleeve 322 to rotate, the second sleeve 322 rotates relative to the second threaded sleeve 324, so that the second sleeve 322 rises, and the second sleeve 322 drives the abutting block 325 to rise, so as to adjust the length of the exposed part of the needle 2, so as to adjust the length of the needle 2 according to the size of the patient, without the need to replace the needle 2 again, and the needle 2 is directly fixedly installed at one end of the syringe body 1, avoiding the installation of the needle 2 during use, and simplifying the operation steps.

[0029] The limiting assembly 4 comprises a mounting frame 41, a plurality of mounting grooves 42 are formed in the side wall of the mounting frame 41, the plurality of mounting grooves 42 correspond to the plurality of plug-in holes 5 one by one, and a plurality of elastic members 43 are mounted in the mounting grooves 42, one end of the elastic member 43 is fixedly connected to the side wall of the mounting groove 42, and the other end of the elastic member 43 is attached to the side wall of the plug-in hole 5.

[0030] The elastic member 43 comprises a spring 431, one end of the spring 431 is fixedly connected to the side wall of the mounting groove 42, and the other end of the spring 431 is attached with a plug-in block 432, the plug-in block 432 penetrates into the plug-in hole 5.

[0031] The plurality of insertion holes 5 are all semispherical holes, the plurality of insertion blocks 432 are all spherical and matched with the insertion holes 5, the vertical section of any section of the sliding groove 6 is semicircular, the sliding groove 6 is an annular groove, the plurality of insertion holes 5 and the plurality of insertion blocks 432 are arranged in a circle with the center axis of the installation shell, when the length of the exposed part of the needle 2 is adjusted, the installation frame 41 is first pulled upward, the spherical insertion block 432 is moved into the sliding groove 6, at this time, the insertion block 432 is inserted into the sliding groove 6, the installation frame 41 can be rotated to adjust the extension length of the multi-stage telescopic assembly 3, since the spring 431 and the insertion block 432 are surface bonded, when the installation frame 41 is pulled and rotated, the insertion block 432 is rotated, thereby reducing the abrasion between the insertion block 432 and the syringe body 1.

[0032] The circuit and the control involved in the utility model are prior art, and too much repetition is not performed herein.

[0033] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and equivalent structures or equivalent process transformations using the utility model specification and the attached drawings, or direct or indirect application in other related technical fields are also included in the patent protection range of the utility model.

Claims

1. A disposable pen-type injector, characterized in that, The utility model provides an injection device, which comprises an injection body (1), a needle (2) fixedly connected to the top end of the injection body (1), a multi-stage telescopic assembly (3) nested outside the needle (2), a limiting assembly (4) fixedly connected to the bottom end of the multi-stage telescopic assembly (3) to prevent the multi-stage telescopic assembly (3) from freely moving, a plurality of insertion holes (5) provided in the side wall of the injection body (1) and matched with the limiting assembly (4), and a sliding groove (6) provided in the injection body (1) and matched with the limiting assembly (4).

2. The disposable pen injector of claim 1, wherein The multi-stage telescopic assembly (3) comprises an outer shell (31), a lifting member (32) threadedly connected to the inner wall of the outer shell (31), and a threaded rod (33) threadedly connected to the inner wall of the lifting member (32), wherein a through hole is formed in the threaded rod (33), the needle (2) passes through the through hole, and the bottom end of the threaded rod (33) is fixedly connected to the center of the top end of the injection body (1).

3. The disposable pen injector of claim 2, wherein, The lifting member (32) comprises a first sleeve (321) slidably connected to the inner wall of the outer shell (31), a first threaded sleeve (323) movably connected to the first sleeve (321), a second sleeve (322) threadedly connected to the outer wall of the first threaded sleeve (323), a second threaded sleeve (324) movably connected to the inner wall of the second sleeve (322), and an abutting block (325) threadedly connected to the outer wall of the second threaded sleeve (324).

4. The disposable pen injector of claim 3, wherein, The limiting assembly (4) comprises a mounting frame (41) provided with a plurality of mounting grooves (42) in the side wall thereof, and a plurality of elastic members (43) mounted in the mounting grooves (42), wherein one end of each elastic member (43) is fixedly connected to the side wall of the corresponding mounting groove (42), and the other end of each elastic member (43) is attached to the side wall of the corresponding insertion hole (5).

5. The disposable pen injector of claim 4, wherein, The elastic member (43) comprises a spring (431) having one end fixedly connected to the side wall of the corresponding mounting groove (42) and the other end provided with an insertion block (432) inserted into the corresponding insertion hole (5).

6. The disposable pen- injector according to claim 5, characterized in that Each of the insertion holes (5) is a semispherical hole, and each of the insertion blocks (432) is a ball-shaped block matched with the corresponding insertion hole (5).

7. The disposable pen- injector according to claim 6, characterized in that Each of the insertion holes (5) and each of the insertion blocks (432) are arranged in a circle around the central axis of the mounting frame, and each of the insertion holes (5) is matched with one of the insertion blocks (432).

8. The disposable pen injector of claim 7, wherein, The sliding groove (6) is an annular groove, and the vertical section of any segment of the sliding groove (6) is semicircular.

9. The disposable pen injector of claim 8, wherein, The diameters of the insertion blocks (432) and the mounting grooves (42) are greater than the diameters of the insertion holes (5) and the sliding groove (6).

10. The disposable pen injector of claim 8, wherein, The side wall of the injection body (1) is provided with a display screen, and the tail end of the injection body (1) is provided with a knob for adjusting the amount of medicine.

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