CN213724131U

CN213724131U - Injection device with memory function

Info

Publication number: CN213724131U
Application number: CN202022287147.7U
Authority: CN
Inventors: 吴亚金; 朱涛
Original assignee: Shanghai Umitai Medical Technology Co ltd
Current assignee: Shanghai Umitai Medical Technology Co ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-07-20
Anticipated expiration: 2030-10-14

Abstract

The utility model provides an injection apparatus with memory function, injection apparatus includes lid, the cover body, piston, catch bar, transmission element, pushes away pipe, casing, fixed component, clutch ring, locating part, outer rotary drum, interior rotary drum, spring, tail cap. Its advantages are: the utility model provides an injection device simple structure, convenient to use makes the patient when the insufficient single injection volume of remaining dose in the medicine bottle, sets up out accurate injection dose when switching new medicine bottle more easily, and this is extremely important to the application of the medicine that needs accurate injection many times such as insulin, growth hormone, follicle stimulating hormone.

Description

Injection device with memory function

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to injection device with memory function.

Background

With the aging population and the changing lifestyle, diabetes has become an epidemic whose pathogenesis is the inability of the pancreas to produce sufficient insulin or the inability of the pancreas to properly use the insulin it secretes. Diabetes is a very serious chronic disease with numerous complications, which may lead to serious consequences such as myocardial infarction, cerebral hemorrhage, blindness, renal failure and lower limb amputation of patients.

Currently, the key to treating diabetes is insulin, which typically requires an injection device for administration by injection. Many patients are not satisfied with the existing injection methods, for example, memory problems are common among patients receiving insulin therapy. Setting and memorizing a dose of the first vial of insulin is particularly difficult for the patient when two vials of insulin may be required to complete an injection when one vial of insulin is running low. The same problem exists with injectable drugs such as growth hormone and follitropin, and therefore, there is a need to develop an injection device that can solve this technical problem.

Disclosure of Invention

An object of the utility model is to provide an injection device with memory function.

In order to achieve the above object, the present invention provides an injection device with memory function, which comprises a cover body, a push rod, a transmission element, a push tube, a housing, a fixing element, a clutch ring, a limit member, an outer rotating tube, an inner rotating tube, a spring, and a tail cap,

the cover body is fixed at the front end of the shell, the cover body covers the cover body, the push rod is provided with external threads, the push rod extends into the cover body, the rear end of the push rod is inserted into the transmission element and the push pipe, the transmission element is provided with internal threads matched with the external threads of the push rod, the push pipe is inserted into the inner rotary drum,

the outer side of the front section of the inner rotary drum is smooth, the clutch ring is sleeved on the front section of the inner rotary drum, the front end surface and the rear end surface of the clutch ring are provided with unidirectional teeth in opposite directions, the middle section of the inner rotary drum is provided with external threads, the limiting piece is sleeved on the middle section of the inner rotary drum, a circle of bulge is arranged between the front section and the middle section of the inner rotary drum, the front surface of the bulge is provided with the unidirectional teeth, the tail end of the inner rotary drum is a spring shaft, the spring is sleeved on the spring shaft, the outer rotary drum is sleeved on the outer side of the inner rotary drum, the inner side of the front end of the outer rotary drum is provided with a circle of bulge, the rear surface of the bulge is provided with the unidirectional teeth, the outer rotary drum is provided with a spiral groove, the outer rotary drum is provided with a scale interval, the center of the tail cap is provided with a limiting shaft, the limiting shaft extends into the spring shaft, and the tail cap is clamped at the tail end of the outer rotary drum,

the fixing element is provided with internal threads, the fixing element is sleeved on the outer rotating cylinder and fixed at the tail of the shell, and the tail of the shell and the fixing element are provided with scale value display windows.

Optionally, a cassette bottle is installed in the cover body, the front end of the push rod is connected with a piston, and the piston is located at the rear end of the cassette bottle.

Optionally, the tail of the cover body is provided with two elastic sheets.

Optionally, the cover is snapped into the transfer element, and the transfer element is snapped into the housing.

Optionally, the cover body is of a hollow structure.

Optionally, the front end of the cover body is provided with an external thread connected with the injection needle.

Optionally, the push rod is provided with a groove, and a protrusion matched with the groove of the push rod is arranged on the inner side of the push tube.

Optionally, a circle of unidirectional teeth is arranged at the rear end of the transmission element, and a unidirectional elastic sheet is arranged at the front end of the pushing pipe.

Optionally, a groove is formed in the outer side of the pushing pipe, and a protrusion matched with the groove of the pushing pipe is formed in the inner side of the inner rotating cylinder.

Optionally, the limiting member is a half ring with a radian greater than 180 degrees, an internal thread is arranged on the inner circular surface of the limiting member, a protrusion is arranged on the outer circular surface of the limiting member, and a groove matched with the protrusion of the limiting member is arranged on the inner side of the outer cylinder.

Optionally, a limiting boss for limiting the start and the end of the limiting member is arranged in the middle section of the inner rotary drum.

The utility model has the advantages as follows:

the utility model provides an injection device simple structure, convenient to use makes the patient when the insufficient single injection volume of remaining dose in the medicine bottle, sets up out accurate injection dose when switching new medicine bottle more easily, and this is extremely important to the application of the medicine that needs accurate injection many times such as insulin, growth hormone, follicle stimulating hormone.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic cross-sectional view of an initial state of an injection device with a memory function according to an embodiment of the present application.

Fig. 2 is a schematic cross-sectional view of a dose setting state of an injection device with memory function according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional view illustrating an injection-completed state of the injection device with a memory function according to the embodiment of the present application.

Fig. 4 is an exploded view of an injection device with memory function according to an embodiment of the present disclosure.

The reference numerals are explained below:

1. the device comprises a cover body, 2, a cover body, 3, a clamping bottle, 4, a piston, 5, a push rod, 6, a transmission element, 7, a push pipe, 8, a shell, 9, a fixing element, 10, a clutch ring, 11, a limiting part, 12, an outer rotary cylinder, 13, an inner rotary cylinder, 14, a spring, 15 and a tail cap.

Detailed Description

The technical solution proposed by the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used only for explaining relative positional relationships between the respective members or components, and do not particularly limit the specific installation orientations of the respective members or components.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-4, the present invention provides an injection device with memory function, which can be used for injection including but not limited to insulin, the injection device comprises a cover body 1, a cover body 2, a cartridge 3, a piston 4, a push rod 5, a transmission element 6, a push tube 7, a housing 8, a fixing element 9, a clutch ring 10, a limit piece 11, an outer rotating cylinder 12, an inner rotating cylinder 13, a spring 14, and a tail cap 15.

The cover body 1 can cover the cover body 2 and can also be detached from the cover body 2, in one embodiment, a circle of groove is arranged on the inner side of the cover body 1, a protrusion is arranged on the cover body 2, and the groove of the cover body 1 is matched with the protrusion of the cover body 2. The tail part of the cover body 2 is provided with two elastic sheets, the card type bottle 3 is arranged in the cover body 2, in the arranging process, the tail elastic sheet of the cover body 2 has certain damping effect to prevent the card type bottle 3 from sliding into the cover body 2 too fast, and after the arranging, the tail elastic sheet of the cover body 2 just clamps the card type bottle 3 in the cover body 2. The piston 4 is positioned at the rear end of the cassette bottle 3, and the liquid medicine in the cassette bottle 3 can be injected by pushing the piston 4. Optionally, the cover body 2 may be made of a transparent material or may be hollow so as to observe the liquid medicine in the cassette bottle 3. The front end of the cover body 2 is provided with external threads so as to be connected with an injection needle.

The push rod 5 is provided with an external thread and two symmetrical grooves, the push rod 5 can extend into the cassette bottle 3, the front end of the push rod 5 is connected with the piston 4, and the rear end of the push rod 5 is inserted into the transmission element 6 and the push pipe 7. The cover body 2 is connected with the transmission element 6 in a clamped mode, according to requirements, the clamping portion on the cover body 2 can be arranged to be thin, the surface of the transmission element 6 is smooth, and therefore clamping can be achieved between the cover body 2 and the transmission element 6 rapidly. The transmission element 6 is snapped onto the housing 8, so that the cover 2 is fixed to the housing 8. The transmission element 6 is provided with an internal thread matched with the external thread of the push rod 5, and the rear end of the transmission element 6 is provided with a circle of one-way teeth.

The front end of the pushing pipe 7 is provided with a one-way elastic sheet, the inner side of the pushing pipe 7 is provided with two symmetrical bulges which are matched with the grooves of the pushing rod 5, and the outer side of the pushing pipe 7 is provided with two symmetrical grooves. Due to the limiting of the one-way teeth, the pushing pipe 7 can only rotate towards one direction, when the pushing pipe 7 rotates, the pushing rod 5 is driven to rotate, and under the guiding effect of the threads of the transmission element 6, the pushing rod 5 pushes the piston 4 to move forwards.

The inner side of the inner rotating drum 13 is provided with two symmetrical bulges which are matched with the grooves on the outer side of the pushing pipe 7. The outer side of the front section of the inner rotary drum 13 is smooth, the clutch ring 10 is sleeved on the front section of the inner rotary drum 13, and the front end face and the rear end face of the clutch ring 10 are provided with unidirectional teeth in opposite directions. The middle section of the inner rotary drum 13 is provided with external threads, the number of turns of the external threads at the middle section of the inner rotary drum 13 is the same as the actual number of turns of the push rod 5, and the number of turns can be an integer or a decimal. The limiting part 11 is sleeved on the middle section of the inner rotating cylinder 13, the inner circular surface of the limiting part 11 is provided with an inner thread matched with the outer thread of the inner rotating cylinder 13, the outer circular surface of the limiting part 11 is provided with two protrusions capable of being synchronously and rotatably connected with the outer rotating cylinder 12, the limiting part 11 is a half ring with a radian larger than 180 degrees, in one embodiment, the radian of the limiting part 11 is about 220 degrees, and the limiting part 11 is a thin-wall element, so that a gap of the half ring can be easily opened under the action of external force, and the half ring can be installed on the inner rotating cylinder 13 and is not easy to fall down. The middle section of the inner rotating cylinder 13 is provided with an initial limit boss and a final limit boss, and the limit boss abuts against the semi-ring opening of the limit part 11 to limit the limit part 11 to further rotate. A circle of bulge is arranged between the front section and the middle section of the inner rotary drum 13, and one-way teeth are arranged on the front surface of the bulge. The tail end of the inner rotary drum 13 is a spring shaft, and the spring 14 is sleeved on the spring shaft. The outer rotating cylinder 12 is sleeved on the outer side of the inner rotating cylinder 13, a circle of protrusion is arranged on the inner side of the front end of the outer rotating cylinder 12, one-way teeth are arranged on the rear surface of the protrusion, two symmetrical grooves are arranged on the inner side of the outer rotating cylinder 12 and matched with the protrusion of the limiting part 11, a spiral groove is arranged on the outer side of the outer rotating cylinder 12, and the outer rotating cylinder 12 is provided with a corresponding scale value. A limiting shaft is arranged at the center of the tail cap 15, the limiting shaft extends into the spring shaft, and the tail cap 15 is clamped at the tail end of the outer rotating cylinder 12.

The fixing element 9 is clamped into the tail of the shell 8, the tail of the shell 8 is provided with a scale value display window, the fixing element 9 is correspondingly provided with a scale value display window, and the scale value on the outer rotating cylinder 12 can be read through the scale value display window. The fixing element 9 is provided with an internal thread matching the helical groove of the outer rotor 12, the outer rotor 12 being fitted into the fixing element 9. In order to prevent the outer drum 12 from sliding out of the fixing element 9, the front end of the outer drum 12 may be provided with a protruding structure; in order to facilitate the installation of the outer rotor 12 into the fixing element 9, a small section of the front end of the outer rotor 12 may be provided with an hollowed-out structure.

Before use, the injection device is shown in fig. 1, the outer barrel 12 is screwed into the housing 8 to the maximum extent, and at this time, the scale value display window displays that the scale value is zero.

In setting a dose, the injection device is shown in fig. 2, wherein said outer barrel 12 is rotated backwards and the outer barrel 12 is rotated to set the desired injection dose. The clutch ring 10 is in close contact with the outer rotary cylinder 12 and the inner rotary cylinder 13 through the pressure of the springs, the outer rotary cylinder 12 is manually rotated in the process of setting the dose, at the moment, the outer rotary cylinder 12 and the clutch ring 10 generate axial rotation displacement, the clutch ring 10 drives the inner rotary cylinder 13 to break through the pressure of the springs 14 to complete the displacement, then the springs 14 push the inner rotary cylinder 13 and the clutch ring 10 to axially reset, the outer rotary cylinder 12 rotates to drive the limiting piece 11 to rotate, but the inner rotary cylinder 13 does not rotate, and the push pipe 7 and the push rod 5 do not rotate.

During injection, the tail cap 15 is pressed, the clutch ring 10, the outer rotary drum 12 and the inner rotary drum 13 cannot axially displace under the pressure of the tail cap 15, the tail cap 15 is further pushed to move forwards, at the moment, the outer rotary drum 12 rotates to drive the inner rotary drum 13 to rotate, the inner rotary drum 13 rotates to drive the pushing pipe 7 to rotate, and the pushing pipe 7 rotates to enable the pushing rod 5 to move forwards, so that injection of liquid medicine is completed. After the injection is completed, the injection device is shown in fig. 3.

The memory function is realized by the following steps:

when the dosage is set, the external rotating cylinder 12 can be rotated by an artificial external force, the external rotating cylinder 12 and the limiting part 11 can synchronously rotate and axially slide through the matching of the protrusions and the grooves, the limiting part 11 can be driven to do spiral motion on the external thread at the middle section of the internal rotating cylinder 13, and the maximum number of turns of the spiral motion is consistent with the number of turns of the spiral of the push rod 5. When the dosage is set, the push rod 5 does not rotate; during injection, the number of turns of the push rod 5 is consistent with the number of turns of the outer rotary cylinder 12 and the limiting piece 11 during dose setting, so that the number of turns of the outer rotary cylinder is limited during dose setting, and a memory function is achieved.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims

1. An injection device with a memory function, which is characterized by comprising a cover body, a push rod, a transmission element, a push pipe, a shell body, a fixing element, a clutch ring, a limiting piece, an outer rotary cylinder, an inner rotary cylinder, a spring and a tail cap,

2. The injection device as defined in claim 1, wherein said housing encloses a cartridge, said pusher rod being connected at a forward end thereof to a piston, said piston being located at a rearward end of said cartridge.

3. The injection device as defined in claim 1, wherein the tail portion of the housing has two resilient tabs.

4. The injection device as defined in claim 1, wherein the cover snaps into the transfer element, the transfer element snapping into the housing.

5. The injection device as defined in claim 1, wherein said housing is a hollow structure.

6. The injection device as defined in claim 1, wherein the front end of said housing is provided with external threads for attachment of an injection needle.

7. The injection device as set forth in claim 1, wherein the push rod is provided with a groove, and the inner side of the push tube is provided with a projection matching with the groove of the push rod.

8. The injection device as defined in claim 1, wherein the rear end of said transmission element is provided with a ring of one-way teeth, and the front end of said push tube is provided with a one-way resilient piece.

9. The injection device as defined in claim 1, wherein the outside of said push tube is provided with a groove and the inside of said inner drum is provided with a protrusion matching the groove of the push tube.

10. The injection device as claimed in claim 1, wherein the retainer is a half ring with an arc greater than 180 degrees, the inner surface of the retainer has internal threads, the outer surface of the retainer has protrusions, and the inner side of the outer cylinder has grooves matching with the protrusions of the retainer.

11. The injection unit of claim 1, wherein the middle section of the inner barrel is provided with a stop boss that limits the start and end of the stop.