CN219271816U - Needle-inserting limiting assembly for injection pen and injection pen with needle-inserting limiting assembly - Google Patents

Abstract

The application discloses injection pen is with spacing subassembly of needle and have its injection pen, the spacing subassembly of needle is used to injection pen includes: the pen refill comprises a bracket sleeve and a pen refill bracket, wherein the bracket sleeve is cylindrical, a mounting channel extending along the axial direction of the bracket sleeve is arranged in the bracket sleeve, and a limiting part is arranged in the mounting channel; the refill support is suitable for installing the refill, the refill support is located along the axial of installation passageway movably in the support sleeve, the refill support be equipped with spacing portion complex mating portion, mating portion with spacing portion cooperates in order to inject the refill support for support sleeve's movable distance. The needle-inserting limiting assembly for the injection pen can divide the driving force of the driving piece into needle-inserting driving force and injection driving force, so that the injection pen can realize needle insertion and injection by using one driving piece, and the structure is simple.

Description

Needle-inserting limiting assembly for injection pen and injection pen with needle-inserting limiting assembly

Technical Field

The application belongs to the technical field of injection pens, and particularly relates to an injection pen needle-inserting limiting assembly and an injection pen with the same.

Background

Existing injection devices are largely divided into two types: one is a disposable syringe conventionally used by medical staff, and the other is an automatic injection pen. The injection pen is suitable for special patients, such as diabetics, hepatitis patients, etc. The automatic injection pen, which is a common medical instrument, can replace manual needle insertion, injection and the like. But most of the existing injection pens form a driving part through a compression spring and a driving part to provide driving force for the pen core, and the two driving parts are needed for needle insertion and injection, so that the structure is complex, the production cost is high, and the popularization and the application of the injection pens are influenced.

Disclosure of Invention

An object of the application is to provide a new technical scheme of injection pen is with spacing subassembly of needle of inserting, can solve the technical problem that current injection pen drive structure is complicated at least.

It is a further object of the present application to provide an injection pen comprising an injection pen needle entry limit assembly as described above.

An injection pen needle insertion limiting assembly according to a first aspect of the present application includes: the support sleeve is cylindrical, an installation channel extending along the axial direction of the support sleeve is arranged in the support sleeve, and a limiting part is arranged in the installation channel; the refill support, the refill support is suitable for the installation refill, the refill support is followed installation passageway's axial movably locates in the support sleeve, the refill support be equipped with spacing portion complex mating portion, mating portion with spacing portion cooperates in order to inject the refill support for support sleeve's movable distance.

According to the injection pen of this application embodiment is with inserting needle spacing subassembly, there is certain interval spacing in spacing portion and cooperation portion when using, can inject needle drive force and injection drive force into with the drive force of driving piece through spacing portion and cooperation portion cooperation can inject refill support for support telescopic range to this, thereby make the injection pen use a driving piece can realize inserting needle and injection, simple structure is favorable to popularization and application.

According to one embodiment of the present application, the support sleeve comprises a first barrel section and a second barrel section, the radial dimension of the first barrel section is greater than the radial dimension of the second barrel section, and the limiting part is arranged between the first barrel section and the second barrel section.

According to one embodiment of the present application, the limiting portion is formed in a truncated cone-shaped structure with a radial dimension gradually decreasing from the first barrel section to the second barrel section.

According to one embodiment of the application, the stop portion is formed as a boss extending radially along the mounting channel, and the mating portion is formed as a flange mating with the boss.

According to one embodiment of the present application, the limiting portion is formed as a protrusion, the engaging portion is formed as an engaging groove matching the shape of the protrusion, and the limiting portion limits the cartridge holder to move relative to the holder sleeve in the case where the protrusion is engaged with the engaging groove.

According to an embodiment of the present application, the limiting portion includes: the annular fixing piece is connected to the mounting channel, an elastic piece extending in the axial direction is arranged at one end of the annular fixing piece, one end of the elastic piece is connected with the annular fixing piece, the other end of the elastic piece is movable, and the protrusion is arranged at the other end of the elastic piece.

According to one embodiment of the present application, the side wall of the support sleeve is provided with a guide part, the side wall of the pen core support is provided with a guide piece corresponding to the guide part, and the guide piece can move along the axial direction of the support sleeve relative to the guide part.

According to one embodiment of the application, the guide is formed as a straight slot and the guide is formed as a projection matching the straight slot.

According to an embodiment of the application, a plurality of elastic arms extending along the axial direction of the elastic arms are arranged at one ends of the pen core support, one ends of the elastic arms are connected with the support sleeve, the other ends of the elastic arms are movable, and a limiting piece for limiting the flanging of the pen core is arranged on the inner side of the other ends of the elastic arms.

An injection pen according to the second aspect of the present application comprises an injection pen needle insertion limiting assembly according to any of the embodiments described above.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic structural view of an injection pen needle insertion limiting assembly according to one embodiment of the present application;

FIG. 2 is a schematic illustration of the internal structure of an injection pen needle insertion limiting assembly according to one embodiment of the present application;

FIG. 3 is a schematic structural view of a cartridge holder of an insertion limiting assembly for an injection pen according to an embodiment of the present application;

FIG. 4 is a schematic view of a limit portion of an injection pen needle insertion limit assembly according to another embodiment of the present application;

FIG. 5 is a schematic view of an internal structure of an injection pen needle insertion limiting assembly according to another embodiment of the present application in a first state;

fig. 6 is a schematic view illustrating an internal structure of an injection pen needle insertion limiting assembly according to another embodiment of the present application in a second state.

Fig. 7 is a schematic view showing an internal structure of an injection pen needle insertion limiting assembly according to an embodiment of the present application after a cartridge is mounted.

Reference numerals:

needle-in limiting assembly 1000 for injection pen;

a bracket sleeve 100; a limit part 110; an annular fixing member 111; an elastic sheet 112; a guide 120;

a cartridge holder 200; a fitting portion 210; a guide 220; a resilient arm 230; and a stopper 240.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

An injection pen needle insertion limiting assembly 1000 according to an embodiment of the present application is described in detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, an injection pen needle insertion limiting assembly 1000 according to an embodiment of the present application includes a holder sleeve 100 and a cartridge holder 200.

Specifically, the support sleeve 100 is formed in a column shape, a mounting channel extending along the axial direction of the support sleeve 100 is arranged in the support sleeve 100, the support sleeve 100 is suitable for mounting a pen core, and a limiting part 110 is arranged in the mounting channel; the cartridge holder 200 is movably disposed in the holder sleeve 100 in an axial direction of the mounting passage, one end of the cartridge holder 200 is engaged with the cartridge to push the cartridge into the advancing needle and the injection, the cartridge holder 200 is provided with an engaging portion 210 engaged with the limiting portion 110, and the engaging portion 210 is engaged with the limiting portion 110 to define a moving distance of the cartridge holder 200 with respect to the holder sleeve 100.

In other words, the injection pen needle-insertion limiting assembly 1000 according to the embodiment of the present application mainly comprises a support sleeve 100 and a pen core support 200, wherein the support sleeve 100 may be formed into a columnar structure, a mounting channel penetrating through the support sleeve 100 is provided in the axial direction, and a limiting portion 110 is provided in the mounting channel; the cartridge holder 200 is inserted into the holder sleeve 100 from the holder sleeve 100 and is movable in an axial direction of the mounting passage, the cartridge holder 200 is used for mounting a cartridge, a needle head of the cartridge after the cartridge is mounted extends out from a lower end of the cartridge holder 200, a limiting structure is provided in the cartridge holder 200 to prevent the cartridge from falling from the cartridge holder 200, the cartridge holder 200 is provided with a fitting portion 210 fitted with the limiting portion 110, and a distance of the cartridge holder 200 movable downward with respect to the holder sleeve 100 can be defined by the fitting portion 210 fitted with the limiting portion 110.

In addition, the cartridge holder 200 may be integrally formed with the cartridge barrel of the cartridge, that is, the matching portion 210 may be directly disposed on the cartridge barrel to achieve the same effect.

Therefore, according to the injection pen needle insertion limiting assembly 1000 of the embodiment of the application, when the injection pen is used, a certain distance exists between the limiting part 110 and the matching part 210, the moving distance of the pen core support 200 relative to the support sleeve 100 can be limited by matching the limiting part 110 and the matching part 210, so that the driving force of the driving piece is divided into needle insertion driving force and injection driving force, the injection pen can realize needle insertion and injection by using one driving piece, and the injection pen has a simple structure and is beneficial to popularization and application.

According to one embodiment of the present application, the stand sleeve 100 includes a first barrel section and a second barrel section, the radial dimension of the first barrel section is greater than the radial dimension of the second barrel section, and the limiting portion 110 is disposed between the first barrel section and the second barrel section.

As shown in fig. 1 and 2, that is, the bracket sleeve 100 is composed of a first cylindrical section of an upper section and a second cylindrical section of a lower section, the diameter of the first cylindrical section is larger than that of the second cylindrical section, and the stopper 110 is provided at the junction of the first cylindrical section and the second cylindrical section.

In some embodiments of the present application, the limiting portion 110 is formed in a truncated cone-shaped structure with a radial dimension gradually decreasing from the first barrel section to the second barrel section.

As shown in fig. 1 and 2, that is, the connection part between the lower end of the first cylinder section and the second cylinder section is formed into a circular truncated cone structure, the circular truncated cone structure is used as the limiting part 110, the structure is simple, and the bracket sleeve 100 can be directly processed in an injection molding manner during production.

According to one embodiment of the present application, the stopper 110 is formed as a boss extending radially along the mounting channel, and the fitting portion 210 is formed as a flange matching the boss.

As shown in fig. 2, the inner side of the support sleeve 100 is provided with a boss extending radially along the installation channel, the boss is used as a limiting part 110, the boss can be multiple, multiple bosses can be circumferentially distributed on the inner wall of the support sleeve 100 around the axis of the installation channel, the boss can also be provided with a circular ring structure, the specific structure of the boss can be adaptively adjusted according to the processing difficulty, the actual requirement and other conditions, and the matching part 210 on the cartridge support 200 is formed into a flange structure matched with the boss, so that the structure is simple, and the production cost is low.

In some embodiments of the present application, the limiting part 110 is formed as a protrusion, the engaging part 210 is formed as an engaging groove matching the shape of the protrusion, and the limiting part 110 limits the movement of the cartridge holder 200 with respect to the holder sleeve 100 in the case that the protrusion is engaged with the engaging groove.

As shown in fig. 5 to 6, the limiting part 110 is a protruding structure disposed at the inner side of the installation channel, the engaging part 210 is an engaging groove matched with the protruding structure, and in order to prevent errors from occurring in the circumferential direction when the limiting part 110 is engaged with the engaging part 210, the engaging groove may be formed in a ring shape, thereby facilitating the engagement of the protruding structure with the engaging groove. The protrusion is separated from the fitting groove before the cartridge is inserted into the needle, and is fitted into the fitting groove when the insertion of the cartridge is completed, thereby restricting the cartridge from moving relative to the holder sleeve 100.

According to one embodiment of the present application, the limiting portion 110 includes an annular fixing member 111, the annular fixing member 111 is connected to the mounting channel, one end of the annular fixing member 111 is provided with an elastic sheet 112 extending axially, one end of the elastic sheet 112 is connected to the annular fixing member 111, the other end of the elastic sheet 112 is movable, and the protrusion is disposed at the other end of the elastic sheet 112.

As shown in fig. 4 to 6, the limiting portion 110 includes an annular fixing member 111 fixed in the installation channel, a plurality of elastic pieces 112 extending along the axial direction of the annular fixing member 111 are provided at the lower end of the annular fixing member 111, one end of each elastic piece 112 is integrally formed with the annular fixing member 111, the other end of each elastic piece 112 is movable, and a protrusion is provided at the movable end of each elastic piece 112. The elastic piece 112 provides elastic restoring force for the protrusion during use, and when the protrusion is matched with the matching groove in the axial direction, the protrusion can be automatically inserted into the matching groove under the action of the elastic piece 112 so as to limit the movement of the pen core support 200.

The elastic piece 112 may be replaced by an elastic body such as a spring to provide an elastic force to the engaging portion 210, and may be directly connected to the bracket sleeve 100 if the engaging portion 210 itself has a certain elasticity.

In some embodiments of the present application, the side wall of the holder sleeve 100 is provided with a guide 120, and the side wall of the cartridge holder 200 is provided with a guide 220 corresponding to the guide 120, and the guide 220 is movable along the axial direction of the holder sleeve 100 with respect to the guide 120.

As shown in fig. 1 and 3, that is, the guide 120 for guiding the cartridge holder 200 in the axial direction is provided on the side wall of the holder sleeve 100, the guide 220 corresponding to the guide 120 is provided on the side wall of the cartridge holder 200, and the cartridge holder 200 is prevented from rotating relative to the holder sleeve 100 by the cooperation of the guide 120 and the guide 220, thereby improving the stability of the cartridge holder 200 or the cartridge holder.

According to one embodiment of the present application, the guide 120 is formed as a straight slot, and the guide 220 is formed as a protrusion matching the straight slot.

The side wall of the support sleeve 100 is provided with a straight notch, the straight notch is used as the guide part 120, the side wall of the refill support 200 is provided with a convex block matched with the straight notch, the refill support 200 is guided by matching the convex block with the straight notch, and in order to improve the stability of the refill support 200 during movement, the straight notch can be also provided in a plurality. When the holder sleeve 100 is not provided with other structures as the limiting portion 110, the straight slot may be used as the limiting portion 110, the protruding block may be used as the engaging portion 210, and the protruding block may be engaged with the straight slot to limit the moving distance of the pen core holder 200.

In some embodiments of the present application, one end of the pen core holder 200 is provided with a plurality of elastic arms 230 extending along the axial direction thereof, one end of each elastic arm 230 is connected with the holder sleeve 100, the other end of each elastic arm 230 is movable, and a limiting member 240 for limiting the flanging of the pen core is disposed on the inner side of the other end of each elastic arm 230.

As shown in fig. 3, two symmetrical elastic arms 230 are arranged at the upper end of the pen core support 200, the elastic arms 230 and the pen core support 200 are integrally formed, the upper end of each elastic arm 230 is a movable end, a wedge-shaped limiting part 240 is arranged at the inner side of the movable end of each elastic arm 230, the upper side surface of each limiting part 240 is an inclined surface so as to facilitate the installation of the pen core, and after the pen core is installed, the flange at the upper end of the pen core is limited by the lower side surface of each limiting part 240 and the upper end surface of the pen core support 200.

As shown in fig. 7, when the pen is used, the lower end of the holder sleeve 100 is attached to the skin, the pen core is mounted on the pen core holder 200, a certain distance exists between the limiting part 110 and the matching part 210, when the injection pen applies an impulse to the rubber plug of the pen core through the driving member, because a certain resistance exists between the rubber plug and the syringe of the pen core, the resistance is larger than the friction force between the pen core holder 200 and the holder sleeve 100, so that the pen core holder 200 moves synchronously with the pen core first until the limiting part 110 is matched with the matching part 210, the pen core holder 200 and the syringe stop moving, the process is an injection process, then the driving member continues to drive the rubber plug to move relative to the syringe, the moving distance of the pen core holder 200 relative to the holder sleeve 100 can be limited through the matching of the limiting part 110 and the matching part 210, and the driving force of the driving member is divided into an injection driving force and an injection driving force, so that the injection pen can realize injection and injection by using one driving member.

In summary, according to the injection pen needle insertion limiting assembly 1000 of the embodiment of the present application, the technical problem that the existing injection pen driving structure is complex can be solved, when in use, a certain distance exists between the limiting portion 110 and the matching portion 210, and the moving distance of the pen core support 200 relative to the support sleeve 100 can be limited by matching the limiting portion 110 and the matching portion 210, so that the driving force of the driving member is divided into the needle insertion driving force and the injection driving force, and thus the injection pen can achieve needle insertion and injection by using one driving member.

The application also discloses an injection pen, which comprises the injection pen needle insertion limiting assembly 1000 of any embodiment. Because the injection pen needle insertion limiting assembly 1000 according to the embodiment of the present application can solve the technical problem of complex driving structure of the existing injection pen, the injection pen according to the embodiment of the present application also has the above advantages, and will not be described herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An injection pen is with inserting needle spacing subassembly, characterized in that includes:

the support sleeve (100), the support sleeve (100) is formed into a column shape, a mounting channel extending along the axial direction of the support sleeve (100) is arranged in the support sleeve, and a limiting part (110) is arranged in the mounting channel;

the pen refill support (200), pen refill support (200) are suitable for the installation pen refill, pen refill support (200) are located along the axial of installation passageway movably in support sleeve (100), pen refill support (200) be equipped with spacing portion (110) complex cooperation portion (210), cooperation portion (210) with spacing portion (110) cooperate in order to inject pen refill support (200) for support sleeve (100) the range of motion.

2. The needle-insertion limiting assembly for an injection pen according to claim 1, wherein the stand sleeve (100) comprises a first barrel section and a second barrel section, the radial dimension of the first barrel section being greater than the radial dimension of the second barrel section, the limiting portion (110) being provided between the first barrel section and the second barrel section.

3. Needle-insertion limiting assembly for injection pens according to claim 2, characterized in that the limiting portion (110) is formed in a truncated cone-shaped structure with radial dimensions gradually decreasing from the first barrel section towards the second barrel section.

4. The needle insertion limiting assembly for an injection pen according to claim 1, wherein the limiting portion (110) is formed as a boss extending radially along the mounting channel, and the mating portion (210) is formed as a flange mating with the boss.

5. The needle-insertion limiting assembly for an injection pen according to claim 1, wherein the limiting portion (110) is formed as a protrusion, the engaging portion (210) is formed as an engaging groove matching a shape of the protrusion, and the limiting portion (110) limits movement of the cartridge holder (200) with respect to the holder sleeve (100) with the protrusion engaged with the engaging groove.

6. The needle insertion limit assembly for an injection pen according to claim 5, wherein the limit part (110) comprises: the annular fixing piece (111), annular fixing piece (111) connect in the installation passageway, the one end of annular fixing piece (111) is equipped with its axially extending's elastic sheet (112), the one end of elastic sheet (112) with annular fixing piece (111) are connected, the other end of elastic sheet (112) is movable, the arch is located the other end of elastic sheet (112).

7. The needle-insertion limiting assembly for an injection pen according to claim 1, wherein a guide portion (120) is provided on a side wall of the holder sleeve (100), a guide piece (220) corresponding to the guide portion (120) is provided on a side wall of the cartridge holder (200), and the guide piece (220) is movable relative to the guide portion (120) along an axial direction of the holder sleeve (100).

8. The needle insertion limiting assembly for an injection pen according to claim 7, wherein the guide (120) is formed as a straight slot, and the guide (220) is formed as a protrusion matching the straight slot.

9. The needle-insertion limiting assembly for the injection pen according to claim 1, wherein one end of the pen core support (200) is provided with a plurality of elastic arms (230) extending along the axial direction of the pen core support, one end of each elastic arm (230) is connected with the support sleeve (100), the other end of each elastic arm (230) is movable, and a limiting piece (240) for limiting the flanging of the pen core is arranged on the inner side of the other end of each elastic arm (230).

10. An injection pen comprising an injection pen needle insertion limiting assembly according to any one of claims 1 to 9.

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