Driving assembly and injection pen with same

Abstract

The utility model discloses a driving assembly and an injection pen with the driving assembly, the driving assembly comprises a connecting sleeve, the connecting sleeve is provided with an installation channel penetrating in the first direction, and the first end of the installation channel is suitable for detachably installing a refill support containing a refill; the driving unit is arranged on the connecting sleeve, and the driving unit is suitable for driving a piston of the refill; the detection unit is arranged on one side of the connecting sleeve, and the detection unit is provided with a sensing part; the triggering piece is movably arranged at the second end of the mounting channel between a first position and a second position along the first direction, and the triggering piece can be limited at the second position by the refill bracket; when the trigger piece is located at the first position, the trigger piece and the induction part are staggered, and when the trigger piece is located at the second position, the trigger piece is matched with the induction part so as to trigger the detection unit.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of medical devices, and particularly relates to a drive assembly and an injection pen with the same. BACKGROUND

[0002] The cartridge holder of the existing injection pen is generally installed and fixed in a rotating manner. If the user fails to accurately align the angle during installation, the detection unit on the cartridge holder cannot be correctly docked with the receiving unit on the injection pen. Such improper docking can cause the injection pen to fail to recognize the cartridge, affect the accuracy of injection, and even damage the injection pen. SUMMARY

[0003] The first object of the present application is to provide a new technical solution of a drive assembly, which can at least solve the technical problem that the existing injection pen fails to recognize the cartridge due to improper installation angle of the cartridge holder.

[0004] The second object of the present application is to provide a new technical solution of an injection pen.

[0005] According to the first aspect of the present application, a drive assembly is provided, comprising: a connecting sleeve, the connecting sleeve being provided with an installation channel penetrating in a first direction, a first end of the installation channel being adapted to detachably install a cartridge holder containing a cartridge; a drive unit, the drive unit being provided in the connecting sleeve, the drive unit being adapted to drive a piston of the cartridge; a detection unit, the detection unit being provided on one side of the connecting sleeve, the detection unit being provided with a sensing portion; a trigger, the trigger being movably provided in a second end of the installation channel between a first position and a second position in the first direction, the trigger being capable of being defined in the second position by the cartridge holder; when the trigger is in the first position, the trigger is offset from the sensing portion, and when the trigger is in the second position, the trigger cooperates with the sensing portion to trigger the detection unit.

[0006] Optionally, the sensing portion is configured as a slot photoelectric sensor, the trigger is provided with a trigger rib, when the trigger is in the first position, the trigger rib is offset from the sensing portion, and when the trigger is in the second position, the trigger rib is located in a groove of the sensing portion.

[0007] Optionally, the driving unit comprises: a fixed sleeve, which is arranged at the second end of the mounting channel and fixedly connected with the connecting sleeve; a push rod sleeve, which is movably arranged in the fixed sleeve along the first direction, and the first end of the push rod sleeve is adapted to extend into the mounting channel and push the piston; a screw rod, which is axially arranged along the first direction and threadedly connected with the second end of the push rod sleeve; and a motor, which is fixedly arranged on the fixed sleeve and drivingly connected with the screw rod at the output end thereof to drive the push rod sleeve to move along the first direction.

[0008] Optionally, the connecting sleeve is provided with a mounting notch penetrating through the connecting sleeve along the radial direction thereof, and the trigger member is adapted to be mounted in the mounting channel from the mounting notch.

[0009] Optionally, the driving assembly further comprises: a positioning member, which is arranged in the mounting notch and adapted to limit the position of the trigger member in the radial direction of the mounting channel, and the detection unit is arranged on the positioning member; and a fixing base, which connects the positioning member with the connecting sleeve and / or the fixed sleeve.

[0010] Optionally, the positioning member blocks the entire mounting notch.

[0011] Optionally, the driving assembly comprises two fixing bases, which are arranged on both sides of the connecting sleeve along the radial direction thereof.

[0012] Optionally, the side wall of the fixed sleeve is provided with at least one first connecting block, and the fixing base is sleeved on the first connecting block, and the driving assembly further comprises: a fastener, which is connected with the fixed sleeve at the first end thereof and adapted to fix the fixing base on the fixed sleeve.

[0013] Optionally, in the radial direction of the connecting sleeve, the fixing base is provided with a matching groove on the side thereof close to the connecting sleeve; the connecting sleeve is provided with a second connecting block on the end thereof close to the fixed sleeve, and the second connecting block is matched with the matching groove to connect the connecting sleeve with the fixed sleeve; and / or the positioning member is provided with a third connecting block on the end thereof close to the fixed sleeve, and the third connecting block is matched with the matching groove to connect the positioning member with the fixed sleeve.

[0014] Optionally, the detection unit comprises a temperature detection plate, which is adapted to detect the temperature of the refill.

[0015] According to a second aspect of the present application, there is provided an injection pen comprising the driving assembly according to any one of the above.

[0016] According to the driving assembly of the present application, the trigger member is arranged to cooperate with the sensing part on the detection unit, so that no matter at what angle the user installs the refill holder, it can be ensured that the trigger member is correctly pushed to the second position by the refill holder, so that the trigger member and the sensing part form an effective cooperation, thereby ensuring that the injection pen can accurately identify the presence of the refill, effectively avoiding damage to the injection pen that may be caused by recognition errors, and effectively improving the user experience.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a drive assembly according to one embodiment of the present application;

[0020] Figure 2 is a partial structural diagram of a drive assembly according to one embodiment of the present application;

[0021] Figure 3 is a schematic structural diagram of a drive unit of a drive assembly according to one embodiment of the present application;

[0022] Figure 4 This is a schematic structural diagram of a connecting sleeve of a drive assembly according to an embodiment of the present application at one viewing angle;

[0023] Figure 5 is a schematic structural diagram of a fixing seat of a drive assembly according to one embodiment of the present application;

[0024] Figure 6 1 is a schematic structural diagram of a push rod sleeve of a drive assembly according to an embodiment of the present application;

[0025] Figure 7 is a schematic structural diagram of a connecting sleeve of a drive assembly according to an embodiment of the present application from another perspective;

[0026] Figure 8 Schematic diagram of the structure of a refill holder of an injection pen according to one embodiment of the present application.

[0027] Reference numerals:

[0028] 100. Drive assembly;

[0029] 10, connecting sleeve; 11, second connecting block; 12, limiting groove; 12a, first functional segment; 12b, second functional segment; 12c, clamping groove; 13, avoiding notch; 14, mounting notch;

[0030] 20, driving unit; 21, fixed sleeve; 21a, first connecting block; 22, push rod sleeve; 22a, guide rib; 23, screw rod; 24, motor; 25, connecting seat;

[0031] 30, detection unit; 31, sensing part; 40, trigger piece; 41, trigger rib; 50, positioning piece; 51, third connecting block; 60, fixed seat; 61, matching groove; 62, groove body;

[0032] 200, refill support; 210, protruding part; 211, clamping rib. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent 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, only for explaining the present application, and cannot be understood as a limitation of the present application.

[0034] In the description of the present application, it is to 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" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0035] In the description of the present application, it is to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The drive assembly 100 according to an embodiment of the present application is described in detail below with reference to the accompanying drawings.

[0037] like Figures 1 to 8 As shown, the driving assembly 100 according to an embodiment of the present application includes a connecting sleeve 10 , a driving unit 20 , a detection unit 30 and a trigger member 40 .

[0038] Specifically, the connecting sleeve 10 is provided with a mounting channel extending along a first direction, and a first end of the mounting channel is suitable for mounting a refill holder 200 for accommodating the refill; a driving unit 20 is provided on the connecting sleeve 10, and the driving unit 20 is suitable for driving the piston of the refill; a detection unit 30 is provided on one side of the connecting sleeve 10, and the detection unit 30 is provided with a sensing portion 31; a trigger member 40 is movably provided at the second end of the mounting channel between a first position and a second position along a first direction, and the trigger member 40 can be limited to the second position by the refill holder 200; when the trigger member 40 is in the first position, the trigger member 40 is staggered with the sensing portion 31, and when the trigger member 40 is in the second position, the trigger member 40 cooperates with the sensing portion 31 to trigger the detection unit 30.

[0039] In other words, if Figures 1 to 3 As shown, the drive assembly 100 according to an embodiment of the present application is primarily composed of a connecting sleeve 10, a drive unit 20, a detection unit 30, and a trigger 40. The connecting sleeve 10 is constructed as a tubular structure, and the inner space of the connecting sleeve 10 can serve as an installation passage. The installation passage includes a first installation section and a second installation section. The first installation section is located at the first end of the installation passage, and the second installation section is located at the second end of the installation passage. The first installation section is used to detachably mount the refill holder 200 of the injection pen. The drive unit 20 is mounted at the end of the connecting sleeve 10 away from the refill holder 200. A portion of the drive unit 20 can extend into the installation passage and drive the refill's piston, thereby enabling the injection pen to be filled.

[0040] The trigger member 40 is movably mounted on the second mounting section between a first position and a second position along a first direction. The first position can be located at the lower end of the second position. When the trigger member 40 is located at the first position, the trigger member 40 is in contact with the wall surface of the first end of the second mounting section. When the trigger member 40 is located at the second position, the trigger member 40 is in contact with the wall surface of the second end of the second mounting section, so that the trigger member 40 can only move between the first position and the second position.

[0041] The detection unit 30 is mounted on one side of the connecting sleeve 10, and the detection unit 30 is provided with a sensing part 31 which can be arranged in the mounting channel. When the trigger piece 40 is located at the first position, the position of the trigger piece 40 is offset from the position of the sensing part 31, and the sensing part 31 cannot sense the trigger piece 40. When the trigger piece 40 is located at the second position, the position of the trigger piece 40 corresponds to the position of the sensing part 31, and the trigger piece 40 and the sensing part 31 cooperate to trigger the detection unit 30.

[0042] In this embodiment, when the refill holder 200 is mounted at the first end of the mounting channel, the trigger piece 40 is located at the second position, and the upper end of the refill holder 200 abuts against the trigger piece 40, thereby limiting the trigger piece 40 at the second position, so that the sensing part 31 can accurately sense the trigger piece 40 after the refill holder 200 is mounted, and the injection pen can recognize the refill holder 200.

[0043] Therefore, according to the driving assembly 100 of the present application, the trigger piece 40 cooperates with the sensing part 31 on the detection unit 30, so that no matter how the refill holder 200 is installed by the user, the trigger piece 40 can be correctly pushed to the second position by the refill holder 200, so that the trigger piece 40 and the sensing part 31 form effective cooperation, thereby ensuring that the injection pen can accurately recognize the presence of the refill, effectively avoiding damage to the injection pen due to recognition errors, and effectively improving the user experience.

[0044] In some examples of the present application, the sensing part 31 is configured as a slot photoelectric sensor, and the trigger piece 40 is provided with a trigger rib 41. When the trigger piece 40 is located at the first position, the trigger rib 41 is offset from the sensing part 31. When the trigger piece 40 is located at the second position, the trigger rib 41 is located in the groove of the sensing part 31.

[0045] Specifically, as shown in Figure 2 The detection unit 30 is provided with a slot photoelectric sensor which can be used as the sensing part 31. The groove of the slot photoelectric sensor extends in the first direction. The trigger piece 40 is formed as a ring-shaped piece, and the outer side of the trigger piece 40 is provided with a trigger rib 41 extending in the radial direction thereof. In the first direction, the position of the trigger rib 41 corresponds to the position of the groove. When the trigger piece 40 is located at the first position, the trigger rib 41 is offset from the groove of the slot photoelectric sensor. When the trigger piece 40 is located at the second position, the trigger rib 41 is located in the groove.

[0046] In this embodiment, a non-contact design is adopted between the trigger rib 41 and the slot photoelectric sensor, which avoids mechanical wear and friction, thereby significantly improving the durability and long-term reliability of the system, reducing the failure rate caused by contact wear, and prolonging the service life of the injection pen.

[0047] In some embodiments of the present application, the driving unit 20 comprises: a fixed sleeve 21, which is arranged at the second end of the installation channel and is fixedly connected with the connecting sleeve 10; a push rod sleeve 22, which is movably arranged in the fixed sleeve 21 along a first direction, and a first end of the push rod sleeve 22 is adapted to extend into the installation channel and push the piston; a lead screw 23, which has the same axial direction as the first direction, and is threadedly connected to a second end of the push rod sleeve 22; and a motor 24, which is fixed to the fixed sleeve 21 and has an output end drivingly connected with the lead screw 23 to drive the push rod sleeve 22 to move along the first direction.

[0048] Specifically, as shown in Figure 3 and Figure 6 , the driving unit 20 mainly comprises the fixed sleeve 21, the push rod sleeve 22, the lead screw 23 and the motor 24, wherein the first end of the fixed sleeve 21 is inserted into the second end of the installation channel, the fixed sleeve 21 is fixedly connected with the connecting sleeve 10, the push rod sleeve 22 is movably arranged in the fixed sleeve 21 along the first direction, specifically, the inner wall surface of the fixed sleeve 21 is provided with a plurality of guide grooves extending along the first direction, and correspondingly, the outer side of the push rod sleeve 22 is provided with guide ribs 22a matched with the guide grooves, so that the push rod sleeve 22 can only move along the first direction through the cooperation of the guide grooves and the guide ribs 22a, the first end of the push rod sleeve 22 faces the ink cartridge holder 200, so that the first end of the push rod sleeve 22 can extend into the installation channel and push the piston of the ink cartridge.

[0049] The second end of the fixed sleeve 21 is fixedly connected with a connecting seat 25, the lead screw 23 is coaxially arranged with the push rod sleeve 22, the lead screw 23 is threadedly connected with the push rod sleeve 22, and the lead screw 23 is rotationally connected with the connecting seat 25, the motor 24 can be fixedly connected with the connecting seat 25, and the output end of the motor 24 is drivingly connected with the lead screw 23 through a gear set. When the motor 24 is started, the motor 24 can drive the lead screw 23 to rotate through the gear set, so as to drive the push rod sleeve 22 to move along the first direction, so that the first end of the push rod sleeve 22 can effectively push the piston in the ink cartridge, and the precise control of the liquid medicine in the ink cartridge is realized.

[0050] According to an embodiment of the present application, the connecting sleeve 10 is provided with an installation notch 14 penetrating through the radial direction of the connecting sleeve 10 at one end close to the fixed sleeve 21, and the trigger 40 can be installed in the installation channel from the installation notch 14.

[0051] That is, as shown in Figure 7As shown, the connecting sleeve 10 is provided with a mounting gap 14 at one end close to the fixing sleeve 21, the mounting gap 14 penetrates the connecting sleeve 10 in the radial direction of the connecting sleeve 10, and in the circumferential direction of the connecting sleeve 10, the mounting gap 14 occupies one half of the connecting sleeve 10, and the mounting gap 14 corresponds to the mounting position of the trigger 40, so that the trigger 40 can be mounted in the mounting channel from the mounting gap 14, which is convenient for mounting, and makes the production of the injection pen more convenient.

[0052] In some embodiments of the present application, the drive assembly 100 further comprises a positioning member 50, the positioning member 50 is arranged in the mounting gap 14, the positioning member 50 is adapted to limit the position of the trigger 40 in the radial direction of the mounting channel, and the detection unit 30 is arranged in the positioning member 50; a fixing seat 60, the fixing seat 60 connects the positioning member 50 with the connecting sleeve 10 and / or the fixing sleeve 21.

[0053] Specifically, as shown in the drawings, Figures 1 to 7 The drive assembly 100 further comprises a positioning member 50 and a fixing seat 60, the positioning member 50 can be fixed in the mounting gap 14 through the fixing seat 60 when assembled, and the position of the trigger 40 in the radial direction of the mounting channel can be limited through the positioning member 50, so that the trigger 40 can be prevented from shaking in the radial direction of the mounting channel, and the stability of the trigger 40 during movement can be ensured.

[0054] It should be noted that the way of fixing the positioning member 50 includes the following cases:

[0055] Case one, the fixing seat 60 connects the positioning member 50 and the connecting sleeve 10 together, so as to fix the positioning member 50 in the mounting gap 14.

[0056] Case two, the fixing seat 60 connects the positioning member 50 and the fixing sleeve 21 together, so as to fix the positioning member 50 in the mounting gap 14.

[0057] Case three, the fixing seat 60 connects the positioning member 50, the connecting sleeve 10 and the fixing sleeve 21 together, so as to fix the positioning member 50 in the mounting gap 14.

[0058] In this case, the mounting and fixing of the positioning member 50 can be realized through the fixing seat 60, and the fixing sleeve 21 and the connecting sleeve 10 can be connected together through the fixing seat 60, without the need to additionally set a connecting component for connecting the fixing sleeve 21 and the connecting sleeve 10, so that the structure of the drive assembly 100 can be simplified, and the production and manufacturing are facilitated.

[0059] According to one embodiment of the present application, the positioning member 50 blocks the entire mounting gap 14.

[0060] That is, as shown in the drawings, Figure 1 and Figure 2As shown, the shape of the positioning member 50 corresponds to the shape of the mounting gap 14, so that the positioning member 50 can block the entire mounting gap 14. In this way, the entry of external impurities into the mounting channel can be effectively prevented, thereby ensuring smooth movement of the trigger member 40 in the first direction.

[0061] In some embodiments of the present application, the driving assembly 100 includes two fixing seats 60, which are arranged on both sides of the connecting sleeve 10 in the radial direction.

[0062] Specifically, as shown, Figure 1 the connecting sleeve 10 has oppositely arranged first and second sides in the radial direction, one of the fixing seats 60 is located on the first side of the connecting sleeve 10, and the other fixing seat 60 is located on the second side of the connecting sleeve 10, so that the fixing seats 60 can be connected to the positioning member 50, the connecting sleeve 10 and the fixing sleeve 21 on both oppositely arranged sides of the connecting sleeve 10, thereby ensuring the stability and reliability of the entire structure.

[0063] According to an embodiment of the present application, the side wall of the fixing sleeve 21 is provided with at least one first connecting block 21a, the fixing seat 60 is sleeved on the first connecting block 21a, and the driving assembly 100 further includes a fastener, a first end of the fastener being connected to the fixing sleeve 21, and a second end of the fastener being adapted to fix the fixing seat 60 to the fixing sleeve 21.

[0064] In other words, as shown, Figure 1 and Figure 3 the side wall of the fixing sleeve 21 is provided with a plurality of first connecting blocks 21a, the first connecting blocks 21a can be cuboid bosses or cylindrical bosses, and the fixing seat 60 is provided with a groove 62 matched with the plurality of first connecting blocks 21a, so that the fixing seat 60 can be sleeved on the first connecting blocks 21a, thereby realizing the preliminary connection of the fixing seat 60 and the fixing sleeve 21. The driving assembly 100 further includes a fastener, which can be a screw, a first end of the fastener being threadedly connected to the fixing sleeve 21, and a second end of the fastener being adapted to press the fixing seat 60 against the fixing sleeve 21, thereby realizing the fixed connection of the fixing seat 60 and the fixing sleeve 21.

[0065] In this embodiment, the cooperation of the fixing seat 60 and the first connecting block 21a can limit the movement of the fixing seat 60 in the axial direction of the fixing sleeve 21, so that the fixing seat 60 and the fixing sleeve 21 will not shake in the first direction even when the fastener is loose, thereby ensuring the reliability of the driving assembly 100.

[0066] In some embodiments of the present application, the fixing seat 60 is provided with a matching groove 61 on the side close to the connecting sleeve 10 in the radial direction of the connecting sleeve 10; the connecting sleeve 10 is provided with a second connecting block 11 on the end close to the fixing sleeve 21, the second connecting block 11 matches with the matching groove 61 to connect the connecting sleeve 10 and the fixing sleeve 21; and / or the positioning member 50 is provided with a third connecting block 51 on the end close to the fixing sleeve 21, the third connecting block 51 matches with the matching groove 61 to connect the positioning member 50 and the fixing sleeve 21.

[0067] Specifically, as shown in Figure 1 and Figure 4 , the connecting sleeve 10 is provided with a second connecting block 11 on the end close to the fixing sleeve 21, the second connecting block 11 extends outward along the radial direction of the connecting sleeve 10, the inner side of the fixing seat 60 is provided with a matching groove 61, the matching groove 61 is matched with the shape of the second connecting block 11, and the connecting sleeve 10 and the fixing sleeve 21 can be connected and fixed by matching the second connecting block 11 with the matching groove 61 without the need to set other fastening structures.

[0068] Optionally, as shown in Figure 1 and Figure 7 , the positioning member 50 is provided with a third connecting block 51 on the end close to the fixing sleeve 21, the third connecting block 51 extends outward along the radial direction of the connecting sleeve 10, the inner side of the fixing seat 60 is provided with a matching groove 61, the matching groove 61 is matched with the shape of the third connecting block 51, and the positioning member 50 and the fixing sleeve 21 can be connected and fixed by matching the third connecting block 51 with the matching groove 61 without the need to set other fastening structures.

[0069] Further, the connecting sleeve 10 is provided with a second connecting block 11 on the end close to the fixing sleeve 21, the positioning member 50 is provided with a third connecting block 51 on the end close to the fixing sleeve 21, the inner side of the fixing seat 60 is provided with a matching groove 61, the matching groove 61 is matched with the second connecting block 11 and the third connecting block 51, and the positioning member 50, the connecting sleeve 10 and the fixing sleeve 21 can be connected and fixed by matching the second connecting block 11 and the third connecting block 51 with the matching groove 61 without the need to set other fastening structures, which is simple in structure.

[0070] In the present embodiment, the matching of the second connecting block 11, the third connecting block 51 and the matching groove 61 can limit the movement of the connecting sleeve 10 and the positioning member 50 in the axial direction of the connecting sleeve 10, that is, the connecting sleeve 10 and the positioning member 50 will not shake in the first direction even when the fastener is loose, so that the virtual movement between the push rod sleeve 22 and the ink cartridge ground piston can be avoided, and the reliability of the injection pen can be ensured.

[0071] In summary, according to the driving assembly 100 of the embodiments of the present application, the trigger 40 is matched with the sensing portion 31 on the detection unit 30, so that no matter how the user installs the cartridge holder 200, the trigger 40 can be ensured to be correctly pushed to the second position by the cartridge holder 200, so that the trigger 40 is effectively matched with the sensing portion 31, and the injection pen can accurately identify the presence of the cartridge, effectively avoiding damage of the injection pen caused by identification error, and effectively improving the user experience.

[0072] The embodiments of the present application also provide an injection pen comprising the driving assembly 100 and the cartridge holder 200 described in any of the above embodiments, and the cartridge holder 200 is detachably installed at the first end of the installation channel. Since the driving assembly 100 according to the present application has the above technical effects, the injection pen according to the embodiments of the present application also has the above technical effects, and the present embodiment will not be described again.

[0073] In some embodiments of the present application, the cartridge holder 200 mainly comprises a containing sleeve and a locking sleeve, the containing sleeve comprises an upper tube segment and a lower tube segment, the radial dimension of the lower tube segment is smaller than that of the upper tube segment, the inner side of the upper tube segment and the lower tube segment forms a containing channel for installing a cartridge (for example, a cassette bottle containing a medicament), the upper end of the upper tube segment is adapted to be threadedly connected with the locking sleeve, so as to fix the cartridge in the containing channel, and the outer thread is arranged on the lower end side wall of the lower tube segment, so as to connect with the injection needle. The upper end of the cartridge holder 200 is detachably installed at the first end (i.e., the first installation segment) of the installation channel, the lower end of the cartridge holder 200 is located outside the installation channel, and the lower end of the cartridge holder 200 is used for detachable connection with the injection needle, for example, the lower end of the cartridge holder 200 can be threadedly connected with the injection needle.

[0074] In some embodiments of the present application, the inner wall surface of the installation channel is provided with a limiting groove 12 extending along the circumferential direction thereof, the first end of the installation channel is provided with an avoiding notch 13, one end of the avoiding notch 13 communicates with the limiting groove 12, the cartridge holder 200 is movably arranged in the installation channel around the axis thereof between the third position and the fourth position, the side wall of the cartridge holder 200 is provided with a protruding portion 210, at least part of the protruding portion 210 is misaligned with the avoiding notch 13 when the cartridge holder 200 is located at the third position, the protruding portion 210 is matched with the limiting groove 12 to limit the position of the cartridge holder 200 in the first direction, and the protruding portion 210 corresponds to the position of the avoiding notch 13 when the cartridge holder 200 is located at the fourth position, and the protruding portion 210 can pass through the avoiding notch 13.

[0075] That is, as Figure 7 and Figure 8As shown, the inner wall surface of the mounting channel is provided with one or more limiting grooves 12, the limiting grooves 12 extend along the circumference of the mounting channel, the first end of the mounting channel is provided with avoiding notches 13, the number of the avoiding notches 13 corresponds to the number and position of the limiting grooves 12, the avoiding notches 13 extend along the first direction, so that one end of the avoiding notches 13 communicates with the limiting grooves 12, the outer side of the refill holder 200 is provided with protruding parts 210, the number of the protruding parts 210 corresponds to the number of the avoiding notches 13, and the size of the protruding parts 210 is adapted to the size of the avoiding notches 13, so as to facilitate the protruding parts 210 to pass through the avoiding notches 13.

[0076] When installing the refill holder 200, the position of the protruding parts 210 corresponds to the position of the avoiding notches 13, the upper end of the refill holder 200 can be inserted into the mounting channel from the first end of the mounting channel, until the upper surface of the protruding parts 210 abuts against the wall surface of the limiting grooves 12, at this time the refill holder 200 is located at the fourth position, then the refill holder 200 is rotated, so that the protruding parts 210 are staggered with at least part of the avoiding notches 13, at this time the refill holder 200 is located at the third position, the wall surfaces of the limiting grooves 12 oppositely arranged in the first direction cooperate with the protruding parts 210, so as to limit the position of the refill holder 200 in the first direction; when disassembling the refill holder 200, the refill holder 200 is moved from the third position to the fourth position by rotating the refill holder 200, so that the position of the protruding parts 210 corresponds to the avoiding notches 13, at this time the refill holder 200 can be pulled out along the first direction.

[0077] Therefore, according to the injection pen of the embodiment of the present application, by arranging the protruding parts 210 on the side wall of the refill holder 200, and arranging the corresponding limiting grooves 12 and avoiding notches 13 on the mounting channel of the connecting sleeve 10, the refill holder 200 can be installed by the way of insertion and rotation, and the refill holder 200 can also be disassembled by the way of rotation, which effectively simplifies the disassembly process of the refill holder 200, improves the user experience, and facilitates the user to replace the refill and store the refill holder 200 containing the refill in the refrigerator.

[0078] According to one embodiment of the present application, along the circumference of the mounting channel, the limiting grooves 12 include a first functional section 12a and a second functional section 12b, wherein the first functional section 12a communicates with the avoiding notches 13, the second functional section 12b is staggered with the avoiding notches 13, and the depth of the second functional section 12b is greater than the depth of the first functional section 12a, when the refill holder 200 is located at the third position, the protruding parts 210 are clamped in the second functional section 12b.

[0079] Specifically, as Figure 7As shown, the limiting groove 12 can be divided into a first functional section 12a and a second functional section 12b in the circumferential direction of the installation channel, wherein the first functional section 12a corresponds to and communicates with the position of the avoiding gap 13, and the second functional section 12b is staggered with the position of the avoiding gap 13. When the refill holder 200 is located at the third position, the protruding portion 210 is located in the second functional section 12b, and when the refill holder 200 is located at the fourth position, the protruding portion 210 is located in the first functional section 12a.

[0080] In the present embodiment, the depth of the second functional section 12b is greater than the depth of the first functional section 12a, so as to ensure that when the refill holder 200 is moved to the third position, the protruding portion 210 on the refill holder 200 can be clamped in the second functional section 12b, thereby limiting the position of the refill holder 200 in the circumferential direction of the installation channel, and avoiding the protruding portion 210 from being separated from the second functional section 12b, thereby enhancing the stability and reliability of the connection between the refill holder 200 and the connecting sleeve 10.

[0081] According to some embodiments of the present application, when the refill holder 200 is located at the third position, the protruding portion 210 abuts against the inner wall surface of the second functional section 12b on both sides in the first direction.

[0082] That is, the size of the protruding portion 210 in the first direction can be slightly greater than the size of the second functional section 12b in the first direction, so that when the refill holder 200 is located at the third position, the protruding portion 210 abuts against the inner wall surface of the second functional section 12b on both sides in the first direction, thereby enhancing the connection strength between the refill holder 200 and the connecting sleeve 10, and effectively preventing the refill holder 200 from shaking or moving in the first direction, effectively ensuring the use effect of the injection pen and the user experience.

[0083] In some embodiments of the present application, the second functional section 12b penetrates through the side wall of the connecting sleeve 10, so that the position of the protruding portion 210 can be observed on the outside of the connecting sleeve 10, which is beneficial to installing the refill holder 200 to the appropriate position, and can provide sufficient depth for the second functional section 12b, thereby ensuring the reliability of the connection of the refill holder 200.

[0084] In some examples of the present application, the protruding portion 210 is provided with a clamping rib 211 on one side in the first direction, and the wall surface of the second functional section 12b is provided with a clamping groove 12c, and when the refill holder 200 is located at the third position, the clamping rib 211 is clamped in the clamping groove 12c.

[0085] That is, as Figure 7 and Figure 8As shown, the protruding portion 210 is provided with one or more clamping ribs 211 on one side of the first direction (for example, the lower side of the protruding portion 210), and the wall surface of the second functional section 12b is provided with a clamping groove 12c matched with the clamping rib 211. When the refill holder 200 is moved to the third position, the clamping rib 211 can be clamped into the clamping groove 12c, and the refill holder 200 can be further limited in the circumferential direction of the installation channel, preventing unnecessary displacement. Moreover, the user can be provided with an intuitive feedback, that is, when the user feels the slight resistance or "click" sound of the clamping rib 211 smoothly clamped into the clamping groove 12c, the user can confirm that the refill holder 200 has been accurately and correctly installed.

[0086] According to some embodiments of the present application, the thickness of the clamping rib 211 at the first end and the second end of the circumferential direction of the refill holder 200 gradually thins in a direction away from each other, so that the surface of the clamping rib 211 at both ends of the circumferential direction of the refill holder 200 is formed as an arc-shaped guide surface. The arc-shaped guide surface allows the clamping rib 211 to smoothly cut into the second functional section 12b when the refill holder 200 switches positions, improving the smoothness of the refill holder 200 when switching positions. Moreover, the clamping rib 211 with the arc-shaped guide surface is also easier to disengage from the clamping groove 12c. When disassembling the refill holder 200, the user only needs to apply moderate force to smoothly disengage the clamping rib 211 from the clamping groove 12c, without worrying about damaging the injection pen due to improper disassembly.

[0087] In some optional examples of the present application, the thickness of the protruding portion 210 at the first end and the second end of the circumferential direction of the refill holder 200 gradually thins in a direction away from each other, so that the protruding portion 210 at both ends of the circumferential direction of the refill holder 200 forms an arc-shaped guide surface, which facilitates the disengagement of the protruding portion 210 from the second functional section 12b of the limiting groove 12.

[0088] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A drive assembly, characterized in that: include: A connecting sleeve (10), the connecting sleeve (10) being provided with a mounting channel penetrating along a first direction, the first end of the mounting channel being suitable for detachably mounting a refill holder (200) for accommodating a refill; A driving unit (20), the driving unit (20) being provided on the connecting sleeve (10), and the driving unit (20) being suitable for driving the piston of the pen core; A detection unit (30), the detection unit (30) being provided on one side of the connecting sleeve (10), and the detection unit (30) being provided with a sensing portion (31); a trigger member (40), the trigger member (40) being movably disposed at the second end of the mounting channel between a first position and a second position along the first direction, the trigger member (40) being capable of being limited to the second position by the refill holder (200); When the trigger member (40) is located at the first position, the trigger member (40) and the sensing portion (31) are staggered; when the trigger member (40) is located at the second position, the trigger member (40) cooperates with the sensing portion (31) to trigger the detection unit (30).

2. The drive assembly according to claim 1, wherein: The sensing portion (31) is configured as a slot-type photoelectric sensor, and the triggering member (40) is provided with a triggering rib (41). When the triggering member (40) is located at the first position, the triggering rib (41) is staggered with the sensing portion (31); when the triggering member (40) is located at the second position, the triggering rib (41) is located in the groove of the sensing portion (31).

3. The drive assembly according to claim 1, wherein: The driving unit (20) comprises: a fixed sleeve (21), the fixed sleeve (21) being arranged at the second end of the installation channel, the fixed sleeve (21) being fixedly connected to the connecting sleeve (10); a push rod sleeve (22), the push rod sleeve (22) being movably arranged on the fixed sleeve (21) along the first direction, and a first end of the push rod sleeve (22) being adapted to extend into the installation channel and push the piston; a screw rod (23), wherein the axial direction of the screw rod (23) is the same as the first direction, and the screw rod (23) is threadedly connected to the second end of the push rod sleeve (22); A motor (24) is fixed to the fixed sleeve (21), and an output end of the motor (24) is transmission-connected to the screw rod (23) to drive the push rod sleeve (22) to move along the first direction.

4. The drive assembly according to claim 3, characterized in that An end of the connecting sleeve (10) close to the fixing sleeve (21) is provided with a mounting notch (14) extending radially therethrough, and the trigger member (40) can be mounted on the mounting channel through the mounting notch (14).

5. The drive assembly according to claim 4, characterized in that The drive assembly further includes: a positioning member (50), the positioning member (50) being disposed in the mounting notch (14), the positioning member (50) being adapted to define the position of the trigger member (40) in the radial direction of the mounting channel, and the detection unit (30) being disposed in the positioning member (50); A fixing seat (60) is provided, wherein the fixing seat (60) connects the positioning member (50) and the connecting sleeve (10) and / or the fixing sleeve (21).

6. The drive assembly according to claim 5, characterized in that The positioning member (50) blocks the entire installation gap (14).

7. The drive assembly according to claim 5, characterized in that The driving assembly comprises two fixing seats (60), and the two fixing seats (60) are arranged on both sides of the connecting sleeve (10) in the radial direction.

8. The drive assembly according to claim 5, wherein: The side wall of the fixed sleeve (21) is provided with at least one first connecting block (21a), the fixed seat (60) is sleeved on the first connecting block (21a), and the driving assembly further comprises: A fastener, wherein a first end of the fastener is connected to the fixing sleeve (21), and a second end of the fastener is suitable for fixing the fixing seat (60) to the fixing sleeve (21).

9. The drive assembly according to claim 5, wherein: In the radial direction of the connecting sleeve (10), a matching groove (61) is provided on a side of the fixing seat (60) close to the connecting sleeve (10); A second connecting block (11) is provided at one end of the connecting sleeve (10) close to the fixing sleeve (21), and the second connecting block (11) cooperates with the matching groove (61) to connect the connecting sleeve (10) and the fixing sleeve (21); And / or, a third connecting block (51) is provided at one end of the positioning member (50) close to the fixing sleeve (21), and the third connecting block (51) cooperates with the matching groove (61) to connect the positioning member (50) and the fixing sleeve (21).

10. An injection pen, characterized in that: A drive assembly comprising the drive assembly of any one of claims 1 to 9.

Images