Adjustable electromagnetic needleless injector

Abstract

The utility model provides an adjustable electromagnetic needleless injector. The adjustable electromagnetic needleless injector comprises a shell, a trajectory, an iron core, an electromagnetic driving module, an adapter, a reset spring and a shifting piece mechanism. The electromagnetic driving module is used for driving the iron core to impact towards the front side along a trajectory; the adapter comprises an external thread, a central hole and an ampoule mounting hole, and the adapter is screwed and fixed in the inner hole at the front end of the shell through the external thread; the front end of the main body part of the iron core is provided with an ejector rod which is slidably arranged in the center hole, and a reset spring is installed between the front end face of the main body part of the iron core and the rear end face of the adapter and used for resetting the iron core; the shifting piece mechanism comprises an annular shifting piece capable of being adjusted in the axial direction and a shifting rod connected with the shifting piece, and the annular shifting piece is used for limiting the foremost end of the stroke of the iron core body part. The utility model discloses an adjustable electromagnetic needleless injector. The device has the advantages of being high in universality and high in adjustable capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of syringes, and specifically, to an adjustable electromagnetic needleless syringe. Background Art

[0002] A needleless syringe is a form of syringe without a traditional capillary needle. It needs to use a power mechanism to generate instant high pressure, which acts on the piston mechanism in the ampoule bottle to form a high-pressure jet stream, so that the drug can penetrate the outer layer of the skin to reach the subcutaneous tissue.

[0003] With the development of technology and the wide application of needleless injection, drug products integrated with ampoule drug containers of different specifications have been formed. Generally, an ampoule will be equipped with a corresponding syringe and used in a one-to-one matching form. For example, the form of an electromagnetic automatic needleless syringe with the application number CN200920099502.9 and the name: Electromagnetic Automatic Needleless Syringe is a classic form of such a syringe. Generally, the electromagnetic method is used as the driving force and the spring force is used as the restoring force, and the two are combined for repeated use.

[0004] However, in the process of extensive application of the current system, it will cause patients to need to be equipped with multiple syringes and use multiple ampoules correspondingly, resulting in waste and low utilization efficiency.

[0005] Generally speaking, due to the same principle, needleless injection ampoules are only made in different sizes according to the difference in drug volume, but the proportions are almost similar. Based on this situation, in order to improve the adaptability of the syringe, the syringe needs to be improved so as to achieve universality.

[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Content of the Utility Model

[0007] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide an adjustable electromagnetic needleless syringe with strong universality and strong adjustable ability.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is: an adjustable electromagnetic needleless syringe, which includes a housing, a ballistic integrated in the housing, an iron core arranged in the ballistic, an electromagnetic drive module arranged around the ballistic, a replaceable adapter installed on the front side of the housing, a return spring, and a dial mechanism for adjusting the movement stroke of the iron core;

[0009] The electromagnetic drive module is used to drive the iron core to impact forward along the ballistic, and the control button of the electromagnetic drive module is arranged outside the housing;

[0010] The adapter includes an external thread, a central hole, and an ampoule mounting hole. The adapter is screwed and fixed in the front inner hole of the housing through the external thread;

[0011] A push rod is provided at the front end of the main body of the iron core. The push rod is slidably disposed in the central hole. A return spring is installed between the front end face of the main body of the iron core and the rear end face of the adapter for resetting the iron core;

[0012] The flapper mechanism is disposed in the first half of the ballistic trajectory. The flapper mechanism includes an axially adjustable annular flapper and a lever connected to the flapper. The annular flapper is located inside the ballistic trajectory, and the lever extends outside the housing. The annular flapper is used to limit the foremost end of the travel of the main body of the iron core.

[0013] Based on the above, the adapter is generally cylindrical. The second half of the outer peripheral surface of the adapter is an external thread section, and the first half is a smooth section and is provided with a sealing rubber ring. The second half of the inner hole at the front end of the housing is an internal thread section, and the first half is a smooth section. The length of the internal thread section is more than twice the length of the external thread section.

[0014] Based on the above, a plurality of adapters are provided. Each adapter only has different hole depths and / or hole diameters of the ampoule mounting holes. Each adapter can be replaceably installed in the inner hole of the entire section of the housing.

[0015] Based on the above, the housing is provided with narrow slits corresponding to the movement trajectory of the lever. The narrow slits are symmetrically distributed on both sides of the housing, and the levers are symmetrically distributed around the center of the flapper.

[0016] Based on the above, an axially extending chute is provided on the outer side wall of the housing. A slider is disposed in the chute. The slider is fixed to the lever. A number of pads with the same specifications are filled in the chute at the front end of the slider. By increasing or decreasing the pads, the end position of the slider relative to the chute is adjusted.

[0017] Based on the above, a scale is provided on the outer side of the housing corresponding to the chute, and a pointer is provided on the slider corresponding to the scale.

[0018] Based on the above, a cover is provided at the tail end of the housing. The cover is fixed to the housing by a thread or a bolt.

[0019] The present utility model has substantial features and progress compared with the prior art. Specifically, the present utility model has made two improvements to the existing syringe:

[0020] On the one hand, the traditional outer shell structure is separated to form a replaceable adapter. The adapter is made in various specifications to adapt to different ampoule specifications. The outer dimensions of the adapter itself are consistent to facilitate connection with the syringe outer shell. This design form expands the application range of the syringe. And when new specifications of ampoules are developed, only the corresponding adapters need to be made, resulting in low later R & D investment. Users also don't need to purchase syringes frequently, reducing the R & D and usage costs.

[0021] On the second hand, since different specifications of ampoules have different requirements for the impact stroke, and it is difficult to change the electromagnetic drive module, therefore, by setting a paddle with adjustable position at the front end of the ballistic, restricting the maximum forward impact distance of the iron core in the physical space can achieve the control of the impact stroke.

[0022] This improvement with high adjustability makes the syringe have a wider application range. For manufacturers, it can reduce R & D, design and production costs, and for users, it can reduce the purchase cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the adjustable electromagnetic needleless syringe of the present utility model.

[0024] Figure 2 is a schematic cross-sectional structural diagram of the paddle mechanism in the present utility model.

[0025] Figure 3 is an external schematic diagram of the paddle mechanism in the present utility model.

[0026] Figure 4 is one of the structural diagrams of other adapters in the present utility model.

[0027] Figure 5 is another structural diagram of other adapters in the present utility model.

[0028] In the figure: 1. Outer shell; 2. Ballistic; 3. Iron core; 4. Electromagnetic drive module; 5. Adapter; 6. Return spring; 7. Paddle mechanism; 8. Ampoule;

[0029] 11. Inner hole; 12. Narrow slit; 13. Slide groove; 14. Pad; 15. Scale; 16. Sealing cover;

[0030] 31. Thumb rod;

[0031] 51. External thread; 52. Central hole; 53. Ampoule mounting hole;

[0032] 71. Ring-shaped paddle; 72. Paddle rod; 73. Paddle block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solution of the present utility model will be further described in detail below through specific embodiments.

[0034] As Figure 1 shown, an adjustable electromagnetic needle-free injector includes a housing 1, a ballistic 2 integrated in the housing 1, an iron core 3 disposed in the ballistic 2, an electromagnetic drive module 4 disposed around the ballistic 2, a replaceable adapter 5 mounted on the front side of the housing, a return spring 6, and a dial mechanism 7 for adjusting the movement stroke of the iron core 3.

[0035] Among them, the ballistic 2, the iron core 3, the electromagnetic drive module 4, and the return spring 6 are all conventional configurations of a traditional electromagnetic needle-free injector, which are functional devices that determine the basic functions of the electromagnetic injector. Therefore, these accessories can be obtained through common accessory procurement on the market.

[0036] The electromagnetic drive module 4 is used to drive the iron core 3 to impact forward along the ballistic 2. The control button of the electromagnetic drive module 4 is disposed outside the housing 1, and its power supply battery can be integrated in the tail-end space of the housing 1 or externally mounted in a battery compartment outside the housing. A cover 16 is provided at the tail end of the housing 1, and the cover 16 is fixed to the housing 1 by threads or bolts.

[0037] As Figure 4 and Figure 5 shown, the adapter 5 includes an external thread 51, a central hole 52, and an ampoule mounting hole 53. The adapter 5 is screwed and fixed in the front-end inner hole 11 of the housing 1 through the external thread 51.

[0038] In this embodiment, a plurality of adapters 5 are provided. The adapter 5 is integrally cylindrical. The rear half of the outer peripheral surface of the adapter is an external thread section, and the front half is a smooth section and is provided with a sealing rubber ring. The rear half of the inner hole at the front end of the housing is an internal thread section, and the front half is a smooth section. The length of the internal thread section is more than twice the length of the external thread section.

[0039] Generally, the screwing depth of the adapter 5 is fixed, and the corresponding screwing length can be set through the length of the external thread section. However, in order to cope with the various changes of ampoules, the internal thread section is designed to be long enough to avoid the situation where the internal thread section is not sufficient.

[0040] Each adapter only has different hole depths and / or hole diameters of the ampoule mounting holes. Each adapter can be replaceably mounted in the inner hole of the entire section of the housing.

[0041] The specifications of the ampoule mounting holes at its front end are set according to the common ampoule specifications on the market to improve its versatility. The central hole 52 is used to accommodate the piston rod on the ampoule.

[0042] As Figure 2 and Figure 3As shown, a push rod 31 is provided at the front end of the main body of the iron core 3. The push rod 31 is slidably arranged in the central hole 52. A return spring 6 is installed between the front end face of the main body of the iron core 3 and the rear end face of the adapter 5 for resetting the iron core 3.

[0043] The paddle mechanism 7 is arranged in the first half of the ballistic path 2. The paddle mechanism 7 includes an annular paddle 71 that can be adjusted axially and a paddle rod 72 connected to the paddle. The annular paddle 71 is located inside the ballistic path 2, and the paddle rod 72 extends outside the housing 1. The annular paddle 71 is used to limit the most forward end of the stroke of the main body of the iron core 3.

[0044] Specifically, in this embodiment, the housing 1 is provided with narrow slots 12 corresponding to the movement trajectory of the paddle rod 72. The narrow slots 12 are symmetrically distributed on both sides of the housing 1. The paddle rods 72 are symmetrically distributed around the center of the paddle 71. An axially extending chute 13 is provided on the outer side wall of the housing 1. A paddle block 73 is arranged in the chute 13. The paddle block 73 is fixed to the paddle rod 72. A number of pads 14 with the same specifications are filled in the chute 13 at the front end of the paddle block 73. By increasing or decreasing the pads 14, the end position of the paddle block 73 relative to the chute 13 is adjusted.

[0045] For convenient reading, a scale 15 is provided on the outer side of the housing 1 corresponding to the chute, and a pointer is provided on the paddle block 73 corresponding to the scale.

[0046] Principle of operation description:

[0047] First, according to the specifications of the ampoule 8, determine the adapter 5 that can be used in conjunction with it. Then install the ampoule 8 in the ampoule installation hole at the front end of the adapter 5. The piston rod of the ampoule is located in the central hole of the adapter 5.

[0048] Then, install the adapter with the ampoule 8 into the inner hole at the front end of the housing and fix it.

[0049] Referring to the instruction manual, determine the stroke of the iron core movement required for the current single injection volume of the ampoule 8, increase or decrease the number of pads 14, and then adjust the paddle block 73 to align with the adjusted pads 14. Correspondingly, the annular paddle 71 located inside the ballistic path 2 is also adjusted to the corresponding position.

[0050] When in use, first align the ampoule nozzle with the human body part to be injected. Press the start button, and the electromagnetic drive module 4 generates an instantaneous driving force to push the iron core and the push rod 31 forward to impact the piston rod of the ampoule, and inject the liquid medicine into the subcutaneous tissue under high-speed impact to complete the injection.

[0051] After the operation is completed, disassemble the adapter and the ampoule as appropriate.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present utility model or perform equivalent replacements on some technical features; without departing from the spirit of the technical solutions of the present utility model, they should all be covered within the scope of the technical solutions claimed by the present utility model.

Claims

1. An adjustable electromagnetic needleless injector, characterized in that: It includes a housing, a ballistic integrated within the housing, an iron core disposed in the ballistic, an electromagnetic drive module arranged around the ballistic, a replaceable adapter mounted on the front side of the housing, a return spring, and a dial mechanism for adjusting the movement stroke of the iron core; The electromagnetic drive module is used to drive the iron core to impact forward along the ballistic, and the control button of the electromagnetic drive module is arranged outside the housing; The adapter includes an external thread, a central hole, and an ampoule mounting hole, and the adapter is screwed and fixed in the inner hole at the front end of the housing through the external thread; A push rod is arranged at the front end of the main body of the iron core, the push rod is slidably arranged in the central hole, and the return spring is installed between the front end face of the main body of the iron core and the rear end face of the adapter for resetting the iron core; The dial mechanism is arranged in the first half of the ballistic, and the dial mechanism includes an axially adjustable annular dial and a dial rod connected to the dial. The annular dial is located inside the ballistic, the dial rod extends outside the housing, and the annular dial is used to limit the foremost end of the travel of the main body of the iron core.

2. The adjustable electromagnetic needleless injector according to claim 1, wherein: The adapter is integrally cylindrical. The second half of the outer peripheral surface of the adapter is an external thread section, the first half is a smooth section and is configured with a sealing rubber ring. The second half of the inner hole at the front end of the housing is an internal thread section, and the first half is a smooth section. The length of the internal thread section is more than twice the length of the external thread section.

3. The adjustable electromagnetic needleless injector according to claim 1 or 2, wherein: A plurality of adapters are configured, and the hole depth and / or aperture of only the ampoule mounting holes of each adapter are different. Each adapter can be replaceably mounted in the inner hole of the entire section of the housing.

4. The adjustable electromagnetic needle-free injector according to claim 3, wherein: The housing is provided with narrow slits corresponding to the movement trajectory of the dial rod. The narrow slits are symmetrically distributed on both sides of the housing, and the dial rods are symmetrically distributed around the center of the dial.

5. The adjustable electromagnetic needleless injector according to claim 4, characterized in that: An axially extending chute is arranged on the outer side wall of the housing. A slider is arranged in the chute, the slider is fixed to the dial rod, and a number of identically sized cushion blocks are filled in the chute at the front end of the slider. By increasing or decreasing the cushion blocks, the end position of the slider relative to the chute is adjusted.

6. The adjustable electromagnetic needleless injector according to claim 5, wherein: A scale is arranged on the outer side of the housing corresponding to the chute, and a pointer is arranged on the slider corresponding to the scale.

7. The adjustable electromagnetic needleless injector according to claim 6, wherein: A cover is arranged at the tail end of the housing, and the cover is fixed to the housing by a thread or a bolt.

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