CN117883664B - Bidirectional dose setting unit and fluid delivery device - Google Patents

Bidirectional dose setting unit and fluid delivery device Download PDF

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Publication number
CN117883664B
CN117883664B CN202410052119.7A CN202410052119A CN117883664B CN 117883664 B CN117883664 B CN 117883664B CN 202410052119 A CN202410052119 A CN 202410052119A CN 117883664 B CN117883664 B CN 117883664B
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CN
China
Prior art keywords
dose setting
clutch
setting unit
knob
shell
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Active
Application number
CN202410052119.7A
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Chinese (zh)
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CN117883664A (en
Inventor
俞晓琳
王峰
潘建
王建良
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Joymed Technology (shanghai) Ltd
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Joymed Technology (shanghai) Ltd
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Priority to CN202410052119.7A priority Critical patent/CN117883664B/en
Publication of CN117883664A publication Critical patent/CN117883664A/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31525—Dosing
    • A61M5/31528—Dosing by means of rotational movements, e.g. screw-thread mechanisms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31545—Setting modes for dosing
    • A61M5/31548—Mechanically operated dose setting member
    • A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31593—Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention provides a bidirectional dose setting unit and a fluid conveying device, which belong to the technical field of medicine injection, wherein the bidirectional dose setting unit comprises a shell, a dose setting knob, a scale setting unit and a force storage unit; the inner wall of the shell is connected with the outer wall of the scale setting unit, and one end of the scale setting unit penetrates out of the shell; the dose setting knob is sleeved outside the shell, and the dose setting knob and the shell are connected through an elastic structure; the forward and reverse rotation of the dose setting knob can be realized by extruding the elastic structure; when the elastic structure recovers deformation, the elastic structure can limit the dose setting knob and the shell to rotate relatively; the inner wall of the dose setting knob is also connected with one end of the scale setting unit penetrating out of the shell; the dose setting knob is rotated, the scale setting unit can be driven to rotate, and the scale setting unit generates axial displacement relative to the shell, so that the forward setting and the reverse correction of the dose are realized, and the power storage of the power storage unit can be realized.

Description

Bidirectional dose setting unit and fluid delivery device
Technical Field
The invention relates to the technical field of medicine injection, in particular to a bidirectional dose setting unit and a fluid conveying device.
Background
Injection devices are a common medical device for injecting drugs or liquids into the human body, which are widely used in the medical industry. However, in the implementation of the technology known from the prior art, it can be found that the injection device has a disposable injection device with inseparable medicament and apparatus, and the device is characterized by disposable use, inconvenient use, low product utilization rate and low value. It can also be seen that the injection device has an injection device with a medicament and an instrument that is not separable, but that such a device is dose settable and that the instrument is not reusable after the medicament has been used. It can also be seen that the injection device has a medicament and an instrument which are separable, the medicament typically being provided in the form of a cartridge, the instrument being settable in doses and being reusable, but that the dose setting of such a device is irreversible and cannot be cancelled when the user sets a dose incorrectly requiring a reset, which can lead to inconvenience of handling and risk of injecting a dose. There are also devices that have overdosing situations, which present a number of uncontrollable risks for handling and dose injection procedures.
Chinese patent CN105477744a discloses a fixed dose disposable injection pen, which comprises an external button, an adjusting rod, a shaft sleeve, a housing, a screw rod, a pen core support and a lower housing, wherein the external button is installed at the upper end of the adjusting rod, the screw rod is installed on the adjusting rod through the shaft sleeve, a clamping groove is arranged on the outer wall of the screw rod, a pawl structure is arranged in the clamping groove, a pawl mechanism is arranged at the lower end of the shaft sleeve, the housing is sleeved outside the adjusting rod, a guide groove is arranged in the housing, a unidirectional Jing Chimian for forming a rotary adjusting feedback mechanism with the pawl mechanism of the shaft sleeve is arranged at the lower end of the housing, a pawl structure for forming an inverted pawl structure with the pawl structure on the screw rod is arranged at the bottom of the housing, and a guide block matched with the guide groove is arranged on the adjusting rod. The invention does not enable bi-directional dose control settings, i.e. when a dose is set incorrectly, incorrect dose settings cannot be corrected.
Disclosure of Invention
The present invention provides a bi-directional dose setting unit and a fluid delivery device, which solves the above-mentioned problems in the prior art by providing a method for correcting erroneous dose settings during drug injection.
In order to solve the technical problems, the invention provides a bidirectional dose setting unit, which comprises a shell, a dose setting knob, a scale setting unit and a power storage unit;
the shell is sleeved outside the scale setting unit, the inner wall of the shell is in threaded connection with the outer wall of the scale setting unit, and one end of the scale setting unit penetrates out of the shell; the force storage unit is sleeved outside the scale setting unit;
The dose setting knob is of a hollow structure, is sleeved outside the shell, and is connected with the shell through an elastic structure; the elastic structure is extruded, so that the forward and reverse rotation of the dose setting knob can be realized; when the elastic structure recovers deformation, the elastic structure can limit the dose setting knob and the shell to rotate relatively;
The inner wall of the dose setting knob is also connected with one end of the scale setting unit penetrating out of the shell, and the dose setting knob and the shell are limited to rotate relatively;
The dose setting knob is rotated, the scale setting unit can be driven to rotate, and the scale setting unit generates axial displacement relative to the shell, so that the forward setting and the reverse correction of the dose are realized; the scale setting unit is rotated forward and simultaneously stores the force of the force storage unit.
Further, the elastic structure is an engagement tooth type structure.
Further, the elastic structure comprises an elastic part, and the elastic part is arranged on the inner wall of the dose setting knob or on the outer wall of the shell.
Further, a plurality of mounting grooves are formed in the dose setting knob along the circumferential direction, and are used for accommodating the elastic component; the side of the mounting groove is provided with an opening, and the opening is arranged on the side wall of the mounting groove, which is close to the inside of the dose setting knob.
Further, both ends of the elastic component are arranged in the mounting groove, and the middle part of the elastic component is ejected out of the opening.
Further, the elastic component is an elastic poking piece.
Further, rigid engagement teeth are provided on the outer wall of the housing, the rigid engagement teeth engaging the resilient member.
Further, the inside connecting portion that is provided with of dose setting knob, the inside through-hole that is provided with of connecting portion, be provided with the meshing tooth's socket on the through-hole lateral wall, dose setting knob passes through the outer wall joint of meshing tooth's socket and scale setting element, restricts the relative rotation that takes place between the two.
Further, the scale setting unit comprises a clutch, a driving shaft and a scale, wherein the driving shaft is sleeved outside the clutch, and the driving shaft and the scale are connected in a clamping way; the scale is sleeved outside the driving shaft, and the scale and the driving shaft are connected in a clamping way; the outer wall of the scale is provided with external threads which are in threaded connection with the inner wall of the shell.
Further, the force accumulating unit comprises a coil spring and a coil spring sleeve, wherein the outer ring of the coil spring is fixedly connected with the inner wall of the coil spring sleeve, the inner ring of the coil spring is fixedly connected with the outer wall of the clutch, and the outer wall of the coil spring sleeve is in clamping connection with the shell to limit the relative rotation of the coil spring and the coil spring sleeve; when the dose setting knob is rotated, the clutch is driven to rotate and the wrap spring stores force.
Further, be provided with round circumference recess on the outer wall on casing upper portion, the inner wall of dose setting knob is provided with the spike along circumference, circumference recess and spike cooperation, restricted the axial displacement of dose setting knob, dose setting knob can rotate around the axis.
The invention provides a fluid delivery device, comprising the bidirectional dose setting unit, a resetting unit, a screw clutch and a screw;
The scale setting unit is connected with the reset unit after penetrating out of the dose setting knob; the screw clutch is arranged in the shell and below the scale setting unit; the screw rod penetrates out of the screw clutch and is connected with the internal threads of the scale setting unit;
Rotating the dose setting knob to drive the scale setting unit to rotate, and accumulating the force of the force accumulating unit; the reset unit is pressurized, the clutch in the calibration setting unit moves downwards along the axial direction and is connected with the screw clutch, meanwhile, the limit of rotation dose setting on the rotation of the clutch around the axial direction is relieved, the force accumulation of the force accumulation unit is released, the clutch is driven to rotate, the screw clutch rotates along with the force accumulation unit, and the screw is axially pushed; and when the accumulated force is released, the pressure applied to the reset unit is canceled, and the reset unit drives the clutch to move upwards along the axial direction, so that the reset of the scale setting unit is realized.
Further, a knob cover is arranged in the rotary dose setting knob, the knob cover is of a hollow structure, and the knob cover is arranged above the connecting part of the rotary dose setting knob; the reset unit is arranged at the opening of the knob cover and comprises an injection button, a clutch cover and a holding pressure spring, the holding pressure spring is sleeved outside the clutch, the clutch cover is sleeved above the holding pressure spring, a through hole is formed in the clutch cover, one end of the clutch penetrates out of the through hole, and the upper surface of the clutch cover abuts against one end of the clutch to prevent the clutch cover from being separated from the clutch; the outer cover of the clutch cover is provided with an injection button; the injection button is connected with the knob cover in a sliding way; the outer edge of the injection button is propped against the opening edge of the knob cover, and the movement of the injection button in the direction away from the clutch is limited.
The invention relates to a fluid conveying device with bidirectional dose control, wherein a dose setting knob is connected with a shell through an elastic structure; the elastic structure is extruded, so that the forward and reverse rotation of the dose setting knob can be realized; when the elastic structure recovers deformation, the elastic structure can limit the dose setting knob and the shell to rotate relatively; the inner wall of the shell is in threaded connection with the outer wall of the scale setting unit, the inner wall of the dose setting knob is also connected with one end of the scale setting unit penetrating out of the shell, the scale setting unit comprises a clutch, a driving shaft and a scale, and the driving shaft is sleeved outside the clutch and is in clamping connection with the clutch; the scale is sleeved outside the driving shaft, the scale and the driving shaft are connected in a clamping way, the dose setting knob is rotated, the scale setting unit can be driven to rotate, and the scale generates axial displacement relative to the shell, so that the forward setting and the reverse correction of the dose are realized.
Drawings
FIG. 1 is a schematic illustration of a fluid delivery device with bi-directional dose control according to the present invention;
FIG. 2 is a transverse cross-sectional view of an initial state of a fluid delivery device with bi-directional dose control according to the present invention;
FIG. 3 is a transverse cross-sectional view of a fluid delivery device with bi-directional dose control following depression of an injection button in accordance with the present invention;
Fig. 4 is a schematic view showing a state of the spring paddle during dose setting according to a preferred embodiment of the present invention, wherein fig. 4 (a) is a schematic view showing a state in which the spring paddle is engaged with a tooth slot on the housing during dose setting, and fig. 4 (b) is a schematic view showing a state in which the spring paddle is elastically deformed under being pressed by the housing tooth slot during rotation of the dose setting knob;
fig. 5 is a schematic view of the structure of a dose setting knob, an assembled spring paddle and a knob cover according to a preferred embodiment of the invention, wherein fig. 5 (a) is a longitudinal sectional view of the dose setting knob and fig. 5 (b) is a sectional view of the dose setting knob after the assembly of the spring paddle and knob cover;
FIG. 6 is a schematic view of the spring paddles of a bi-directional dose setting unit and fluid delivery device of the present invention;
FIG. 7 is a schematic illustration of a clutch configuration of a bi-directional dose setting unit and fluid delivery device of the present invention;
FIG. 8 is a schematic illustration of a two-way dose setting unit and stop collar structure of a fluid delivery device according to the present invention;
FIG. 9 is an axial cross-sectional view of a screw clutch of a bi-directional dose setting unit and fluid delivery device of the present invention;
FIG. 10 (a) is a schematic illustration of the structure of a housing of a bi-directional dose setting unit and fluid delivery device of the present invention; fig. 10 (b) is an axial cross-sectional view of a housing of a bi-directional dose setting unit and fluid delivery device of the present invention;
FIG. 11 is an axial cross-sectional view of an inner housing of a bi-directional dose setting unit and fluid delivery device of the present invention;
FIG. 12 is a schematic illustration of the scale structure of a bi-directional dose setting unit and fluid delivery device of the present invention;
Fig. 13 (a) is a schematic view of the structure of a driving shaft of a bi-directional dose setting unit and a fluid delivery device according to the present invention, and fig. 13 (b) is an axial cross-sectional view of the driving shaft of a bi-directional dose setting unit and a fluid delivery device according to the present invention;
14 (a) is a partial enlarged view of the screw; FIG. 14 (b) is a top view of a screw of a bi-directional dose setting unit and fluid delivery device of the present invention;
FIG. 15 is a schematic view of the coil spring housing of a two-way dose setting unit and fluid delivery device of the present invention;
fig. 16 is an exploded view of a fluid delivery device with bi-directional dose control according to the present invention.
Reference is made to the reference numerals: 1 injection button, 2 dose setting knob, 3 holding pressure spring, 4 clutch cover, 5 knob cover, 6 spring plectrum, 7 coil spring, 8 coil spring sleeve, 9 lubrication piece, 10 shell, 11 inner shell, 12 scale, 13 drive shaft, 14 screw, 15 screw clutch, 16 spacing ring, 17 refill holder, 18 cartridge bottle, 19 pen cap, 20 clutch.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
For a better understanding of the objects, structure and function of the invention, a bi-directional dose setting unit and fluid delivery device according to the present invention will be described in further detail below with reference to the accompanying drawings.
Example 1:
as shown in fig. 1, a bi-directional dose setting unit of the present invention comprises a housing 21, a dose setting knob 2, a dial setting unit and a power accumulating unit;
The shell 21 is sleeved outside the scale setting unit, the inner wall of the shell 21 is in threaded connection with the outer wall of the scale setting unit, and one end of the scale setting unit penetrates out of the shell 21; the force storage unit is sleeved outside the scale setting unit;
The dose setting knob 2 is of a hollow structure, is sleeved outside the shell, and is connected with the shell through an elastic structure; the elastic structure is extruded, so that the forward and reverse rotation of the dose setting knob can be realized; when the elastic structure recovers deformation, the elastic structure can limit the dose setting knob and the shell to rotate relatively;
the inner wall of the dose setting knob 2 is also connected with one end of the scale setting unit penetrating out of the shell, and the relative rotation of the dose setting knob and the scale setting unit is limited;
The dose setting knob 2 is rotated to drive the scale setting unit to rotate, and the scale setting unit generates axial displacement relative to the shell, so that the forward setting and the reverse correction of the dose are realized; the scale setting unit is rotated forward and simultaneously stores the force of the force storage unit.
Example 2:
as shown in fig. 1, a bi-directional dose setting unit of the present invention comprises a housing 21, a dose setting knob 2, a dial setting unit and a power accumulating unit;
The shell 21 is sleeved outside the scale setting unit, the inner wall of the shell 21 is in threaded connection with the outer wall of the scale setting unit, and one end of the scale setting unit penetrates out of the shell 21; the force storage unit is sleeved outside the scale setting unit;
As shown in fig. 4, the dose setting knob 2 is of a hollow structure, the dose setting knob is sleeved outside the shell, and the dose setting knob and the shell are connected through an elastic structure; the elastic structure is extruded, so that the forward and reverse rotation of the dose setting knob can be realized; when the elastic structure recovers deformation, the elastic structure can limit the dose setting knob and the shell to rotate relatively;
the inner wall of the dose setting knob 2 is also connected with one end of the scale setting unit penetrating out of the shell, and the relative rotation of the dose setting knob and the scale setting unit is limited;
The dose setting knob 2 is rotated to drive the scale setting unit to rotate, and the scale setting unit generates axial displacement relative to the shell, so that the forward setting and the reverse correction of the dose are realized; the scale setting unit is rotated forward and simultaneously stores the force of the force storage unit.
The present embodiment is different from the first embodiment in that:
The elastic structure is an engaged tooth structure and comprises an elastic part, wherein the elastic part is arranged on the dose setting knob 2 or on the outer wall of the shell 21; when the elastic member is arranged on the dose setting knob 2, the outer wall of the housing 21 is correspondingly provided with rigid engagement teeth; when the elastic member is provided on the outer wall of the housing 21, the inside of the dose setting knob 2 is correspondingly provided with rigid engagement teeth;
Preferably, the elastic member is provided on the outer wall of the housing 21 on the dose setting knob 2, correspondingly provided with rigid engagement teeth;
as shown in fig. 5, the inside of the dose setting knob 2 is provided with a plurality of mounting grooves 2-2 in the circumferential direction for accommodating the elastic member, the side of the mounting groove 2-2 is provided with an opening provided on the side wall of the mounting groove 2-2 near the inside of the dose setting knob 2; as shown in fig. 6, the elastic component is an elastic poking piece 6, two ends of the elastic poking piece 6 are arranged in the mounting groove 2-2, and the middle part of the elastic poking piece 6 is ejected out of the opening towards the inside of the dose setting knob 2;
As shown in fig. 10, the spring paddle 6 provided in the dose knob 2 is engaged with the seventh engaging tooth 10-1 of the outer wall of the housing 10, and the scale of the seventh engaging tooth 10-1 outside the housing 10 and the scale 12 in the scale setting unit have the same scale;
the inside connecting portion that is provided with of dose setting knob 2, connecting portion inside is provided with the through-hole, be provided with meshing tooth's socket 2-1 on the through-hole lateral wall, dose setting knob 2 utilizes meshing tooth's socket 2-1 and the outer wall joint of scale setting element, restricts the relative rotation of taking place between the two.
The scale setting unit comprises a clutch 20, a driving shaft 13 and a scale 12, wherein the driving shaft 13 is sleeved outside the clutch 20 and is clamped with the clutch 20 to limit the relative rotation of the clutch and the scale 12; the scale 12 is sleeved outside the driving shaft 13, and is clamped between the driving shaft 13 and the scale to limit the relative rotation of the driving shaft and the scale;
as shown in fig. 7, the upper part of the clutch 20 is provided with an elastic buckle 20-1;
The outer wall of the elastic buckle 20-1 is provided with a first meshing tooth 20-2, and the first meshing tooth 20-2 is in clamping connection with a meshing tooth socket 2-1 of the connecting part of the dose setting knob 2;
As shown in fig. 13, a second engaging tooth 20-4 is arranged below the first engaging tooth 20-2 of the elastic buckle 20-1, and the second engaging tooth 20-4 is in snap connection with the third engaging tooth 13-2 on the driving shaft 13;
as shown in fig. 12, the outer wall of the driving shaft 13 is provided with a fourth meshing tooth 13-1, and the fourth meshing tooth 13-1 is engaged with a plurality of grooves 12-1 on the inner wall of the scale 12;
The outer wall of the scale 12 is provided with threads 12-2;
the shell 21 comprises an outer shell 10 and an inner shell 11 which are fixedly connected;
as shown in fig. 11, an inner thread 11-2 which is matched with the thread of the scale 12 is provided on the inner wall of the inner shell 11, and a limit stop member 11-3 for limiting the axial movement of the scale 12 is provided on the inner wall of the inner shell 11; the outer wall of the inner shell 11 is provided with a protrusion 11-1 for clamping and fixing with the long groove 10-4 on the outer shell 10.
The inner shell 11 and the outer shell 10 are provided with scale observation windows 10-3 for observing the setting and correction of scales of the scale 12;
as shown in fig. 10, the lower part of the housing 10 is provided with a coupling screw 10-5 for coupling with a fluid containing unit;
The outer wall of the housing 10 is provided with a circumferential groove 10-6 which is matched with the protruding thorns 2-3 arranged on the inner wall of the dose setting knob 2, namely, the dose setting knob 2 can rotate around an axis relative to the housing 10, and the axial displacement of the dose setting knob 2 is limited;
As shown in fig. 1, a lubricant piece 9 is provided above the scale 12, and the lubricant piece 9 abuts against an annular step surface inside the housing 10, thereby restricting axial displacement of the scale 12.
Example 3:
as shown in fig. 1, a bi-directional dose setting unit of the present invention comprises a housing 21, a dose setting knob 2, a dial setting unit and a power accumulating unit;
The shell 21 is sleeved outside the scale setting unit, the inner wall of the shell 21 is in threaded connection with the outer wall of the scale setting unit, and one end of the scale setting unit penetrates out of the shell 21; the force storage unit is sleeved outside the scale setting unit;
As shown in fig. 4, the dose setting knob 2 is of a hollow structure, the dose setting knob is sleeved outside the shell, and the dose setting knob and the shell are connected through an elastic structure; the elastic structure is extruded, so that the forward and reverse rotation of the dose setting knob can be realized; when the elastic structure recovers deformation, the elastic structure can limit the dose setting knob and the shell to rotate relatively;
the inner wall of the dose setting knob 2 is also connected with one end of the scale setting unit penetrating out of the shell, and the relative rotation of the dose setting knob and the scale setting unit is limited;
The dose setting knob 2 is rotated to drive the scale setting unit to rotate, and the scale setting unit generates axial displacement relative to the shell, so that the forward setting and the reverse correction of the dose are realized; the scale setting unit is rotated forward and simultaneously stores the force of the force storage unit.
The present embodiment is different from the second embodiment in that:
As shown in fig. 1, a power storage unit is sleeved on the clutch 20 and is positioned between the first meshing teeth 20-2 and the second meshing teeth 20-3;
as shown in fig. 1 and 15, the force accumulating unit comprises a coil spring 7 and a coil spring sleeve 8, wherein a limit groove 8-1 is formed in the inner wall of the coil spring sleeve 8, and the outer wall of the coil spring sleeve 8 is connected with a shell 21 in a clamping manner to limit relative rotation of the coil spring and the coil spring sleeve;
As shown in fig. 7, the inner ring of the coil spring 7 is fixedly connected with a coil spring limiting structure 20-3 on the clutch 20, and the outer ring of the coil spring 7 is fixedly connected with a limiting groove 8-1;
When the dose setting knob 2 is rotated, the clutch 20 is driven to rotate and the wrap spring 7 stores force.
Example 4:
As shown in fig. 1, a fluid delivery device of the present invention comprises the above-described bi-directional dose setting unit, reset unit, screw clutch 15 and screw 14;
the scale setting unit is connected with the reset unit after penetrating out from the dose setting knob 2; the screw clutch 15 is provided inside the housing 21,
The screw clutch 15 is provided below the scale setting unit; the screw 14 is connected with the internal thread of the scale setting unit after penetrating out from the screw clutch 15;
Rotating the dose setting knob 2 to drive the scale setting unit to rotate so as to store the force of the force storage unit; the resetting unit is pressurized, the clutch 20 in the calibration setting unit moves downwards along the axial direction and is connected with the screw clutch 15, meanwhile, the limit of the rotating dose setting 2 on the rotation of the clutch 20 around the axial direction is relieved, the force accumulation of the force accumulation unit is released, the clutch 20 is driven to rotate, the screw clutch 15 rotates along with the force accumulation unit, and the screw 14 is axially propelled; and when the accumulated force is released, the pressure applied to the reset unit is canceled, and the reset unit drives the clutch to move upwards along the axial direction, so that the reset of the scale setting unit is realized.
The present embodiment is different from the above embodiments in that:
As shown in fig. 1, 5 and 16, the reset unit includes a holding compression spring 3, a clutch cover 4 and an injection key 1; a knob cover 5 is arranged above the connecting part of the rotary dose setting knob 2, the knob cover 5 is of a hollow structure, a holding pressure spring 3 is arranged inside the knob cover 5, the holding pressure spring 3 is sleeved outside the clutch 20, a clutch cover 4 is covered above the holding pressure spring 3, a through hole is arranged inside the clutch cover 4, an elastic buckle 20-1 on the clutch 20 penetrates out of the through hole, and the lower surface of the elastic buckle 20-1 is abutted against the upper surface of the clutch cover 4;
As shown in fig. 3, an injection button 1 is arranged on the outer cover of the clutch cover 4, the outer edge of the injection button 1 is propped against the opening of the knob cover 5, and the movement of the injection button 1 in the direction away from the device is limited; pressing the injection button 1 can push the first engagement tooth 20-2 of the clutch 20 out of the connection of the dose setting knob 2.
As shown in fig. 1, 9 and 14, the screw clutch 15 is sleeved outside the screw 14, the screw clutch 15 is arranged below the clutch 20, and the annular table 15-3 of the screw clutch 15 is abutted with the limit step 13-3 at the lower part of the driving shaft 13, so that the movement of the screw clutch 15 along the axial direction is limited;
the screw clutch 15 is internally provided with an internal thread 15-2 for being in threaded connection with the screw 14;
The clutch 20 is descending, and the fifth engaging tooth 20-5 of the clutch 20 can be connected with the sixth engaging tooth 15-1 on the screw clutch 15;
the clutch 20 is internally provided with a connecting hole, and the screw 14 is threaded with the connecting hole after penetrating out of the screw clutch 15;
As shown in fig. 8, a limiting ring 16 is further arranged below the screw clutch 15, and the screw 14 sequentially penetrates out of the limiting ring 16 and the screw clutch 15 and then is in threaded connection with the inside of the clutch 20;
the buckle 16-1 of the limiting ring 16 is matched with the buckle groove 11-4 of the inner shell 11 to limit the limiting ring 16 to rotate and axially move relative to the outer shell 10, a through hole is formed in the limiting ring 16, a clamping groove convex hull 16-3 is arranged on the inner wall of the through hole, a clamping groove 14-1 is formed in the screw 14, one end of the screw 14 penetrates through the inside of the limiting ring 16, the clamping groove convex hull 16-3 in the limiting ring 16 is matched with the clamping groove 14-1 on the screw 14, so that the screw 14 axially moves relative to the device in the rotation of the screw clutch 15 to push fluid in the clamping bottle 18, and stability and accuracy of fluid conveying can be guaranteed to a greater extent;
The limiting ring 16 is provided with an arc transition convex hull 16-2, and in the rotation process of the driving shaft 13, friction resistance is reduced by the self-lubricating property of the structure and the parts, the structure can increase stability of fluid delivery, and the limiting ring material can be usually made of plastic materials with self-lubricating property such as POM\PTFE.
As shown in fig. 16, a fluid delivery device further includes a fluid containing unit including a cartridge holder 17, a cartridge bottle 18, and a cap 19, wherein the cartridge bottle 18 is contained in the cartridge holder 17, the cap 19 is sleeved outside the cartridge holder 17, and the cartridge holder 17 is threaded with the lower portion of the housing 10.
As shown in fig. 2 and 3, the working process of the fluid conveying device provided by the invention is as follows:
when the dose setting knob 2 is rotated, the clutch 20 rotates, the coil spring 7 starts to accumulate force, the power of the coil spring 7 cannot be released, meanwhile, the seventh meshing tooth 10-1 outside the shell 10 advances by one grid, the dose setting knob 2 drives the clutch 20, the driving shaft 13 and the scale 12 to synchronously rotate, the scale also advances by one grid, the dose setting step is completed, and when the dose setting is wrong, the dose setting knob 2 can be rotated in the opposite direction to correct the dose setting;
In the medicament injection step, the injection button 1 is pressed, the pressure spring 3 is kept to be extruded, the clutch 20 moves downwards axially, the first meshing teeth 20-2 of the clutch 20 are pushed out from the connecting part of the dose setting knob 2, the restriction of the rotation of the clutch 20 around the axis is relieved, and the fifth meshing teeth 20-5 of the clutch 20 are in clamping connection with the sixth meshing teeth 15-1 on the screw clutch 15;
simultaneously, the power of the coil spring 7 rotating around the axis is released, the clutch 20 rotates around the axis relative to the shell 10 under the drive of the coil spring 7, at the moment, the clutch 20 drives the driving shaft 13 and the scale 12 to reversely rotate, and at the same time, the clutch 20 drives the screw clutch 15 and the screw 14 to rotate, the screw 14 axially displaces, and the piston in the clamp bottle is pushed to inject;
After the injection is finished, after the injection button 1 is released, the pressure spring 3 is kept to reset to drive the clutch 20 to leave the screw clutch 15, the first meshing teeth 20-2 of the clutch 20 are connected with the connecting part of the dose setting knob 2 again, and the reset of the dose setting function and the medicine propelling function of the device is realized, so that the device can be repeatedly used for a plurality of times.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art, and new embodiments may be formed by combining the embodiments without contradiction. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A bi-directional dose setting unit comprising a housing, a dose setting knob, a dial setting unit and a power storage unit;
the shell is sleeved outside the scale setting unit, the inner wall of the shell is in threaded connection with the outer wall of the scale setting unit, and one end of the scale setting unit penetrates out of the shell; the force storage unit is sleeved outside the scale setting unit;
The dose setting knob is of a hollow structure, is sleeved outside the shell, and is connected with the shell through an elastic structure; the elastic structure is extruded, so that the forward and reverse rotation of the dose setting knob can be realized; when the elastic structure recovers deformation, the elastic structure can limit the dose setting knob and the shell to rotate relatively;
the elastic structure comprises an elastic component, wherein the elastic component is arranged on the inner wall of the dose setting knob or the outer wall of the shell; the inside of the dose setting knob is provided with a plurality of mounting grooves along the circumferential direction for accommodating the elastic component; the side surface of the mounting groove is provided with an opening, and the opening is arranged on the side wall of the mounting groove, which is close to the inside of the dose setting knob; the two ends of the elastic component are arranged in the mounting groove, and the middle part of the elastic component is ejected out of the opening;
The inner wall of the dose setting knob is also connected with one end of the scale setting unit penetrating out of the shell, and the dose setting knob and the shell are limited to rotate relatively;
The dose setting knob is rotated, the scale setting unit can be driven to rotate, and the scale setting unit generates axial displacement relative to the shell, so that the forward setting and the reverse correction of the dose are realized; the scale setting unit is rotated forward and simultaneously stores the force of the force storage unit.
2.A bi-directional dose setting unit as claimed in claim 1, wherein the resilient structure is an engaged tooth type structure.
3. A bi-directional dose setting unit as claimed in claim 2, wherein the resilient member is a resilient paddle.
4. A bi-directional dose setting unit as claimed in claim 2, wherein the outer wall of the housing is provided with rigid engagement teeth which engage with the resilient member.
5. A bi-directional dose setting unit as claimed in claim 2, wherein the dose setting knob is internally provided with a connecting portion, wherein the connecting portion is internally provided with a through hole, wherein the side wall of the through hole is provided with engagement tooth slots, and the dose setting knob is clamped with the outer wall of the dial setting unit through the engagement tooth slots to limit relative rotation between the two.
6. The bi-directional dose setting unit of claim 5 wherein the dial setting unit comprises a clutch, a drive shaft and a dial, the drive shaft being journaled on the exterior of the clutch, the two being snap-fit; the outer wall of the scale is provided with external threads which are in threaded connection with the inner wall of the shell.
7. The bi-directional dose setting unit of claim 6 wherein the force accumulating unit comprises a wrap spring and a wrap spring sleeve, an outer race of the wrap spring being fixedly connected to an inner wall of the wrap spring sleeve, an inner race of the wrap spring being fixedly connected to an outer wall of the clutch, the outer wall of the wrap spring sleeve being snap-fit connected to the housing, the two being restrained from relative rotation; when the dose setting knob is rotated, the clutch is driven to rotate and the wrap spring stores force.
8. A bi-directional dose setting unit as claimed in claim 6, wherein the outer wall of the upper part of the housing is provided with a circumferential groove, the inner wall of the dose setting knob being provided with a circumferential spike, the circumferential groove cooperating with the spike limiting axial displacement of the dose setting knob, the dose setting knob being rotatable about an axis.
9. A fluid delivery device comprising a bi-directional dose setting unit according to any one of claims 1-8, a reset unit, a screw clutch and a screw;
the scale setting unit is connected with the reset unit after penetrating out of the dose setting knob; the screw clutch is arranged inside the shell,
The screw clutch is arranged below the scale setting unit; the screw rod penetrates out of the screw clutch and is connected with the internal threads of the scale setting unit;
Rotating the dose setting knob to drive the scale setting unit to rotate, and accumulating the force of the force accumulating unit; the reset unit is pressurized, the clutch in the calibration setting unit moves downwards along the axial direction and is connected with the screw clutch, meanwhile, the limit of rotation dose setting on the rotation of the clutch around the axial direction is relieved, the force accumulation of the force accumulation unit is released, the clutch is driven to rotate, the screw clutch rotates along with the force accumulation unit, and the screw is axially pushed; and when the accumulated force is released, the pressure applied to the reset unit is canceled, and the reset unit drives the clutch to move upwards along the axial direction, so that the reset of the scale setting unit is realized.
10. The fluid delivery device of claim 9, wherein a knob cover is disposed inside the rotary dose setting knob, the knob cover being of hollow construction, the knob cover being disposed above the connection portion of the rotary dose setting knob; the reset unit is arranged at the opening of the knob cover and comprises an injection button, a clutch cover and a holding pressure spring, the holding pressure spring is sleeved outside the clutch, the clutch cover is sleeved above the holding pressure spring, a through hole is formed in the clutch cover, one end of the clutch penetrates out of the through hole, and the upper surface of the clutch cover abuts against one end of the clutch to prevent the clutch cover from being separated from the clutch; the outer cover of the clutch cover is provided with an injection button; the injection button is connected with the knob cover in a sliding way; the outer edge of the injection button is propped against the opening edge of the knob cover, and the movement of the injection button in the direction away from the clutch is limited.
CN202410052119.7A 2024-01-12 2024-01-12 Bidirectional dose setting unit and fluid delivery device Active CN117883664B (en)

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Citations (2)

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CN113747932A (en) * 2019-05-07 2021-12-03 益首药物治疗股份公司 Dosing device for an injection device

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JP2005261685A (en) * 2004-03-18 2005-09-29 Matsushita Electric Ind Co Ltd Liquid medicine dosage apparatus
DE102007022067A1 (en) * 2007-05-11 2008-11-13 Rauch Landmaschinenfabrik Gmbh Spreading device for uniform distribution of different spreading materials
DE102007053743A1 (en) * 2007-11-12 2009-06-10 Tecpharma Licensing Ag Rotatable guide sleeve with over-tensioned spring
US8647309B2 (en) * 2008-05-02 2014-02-11 Sanofi-Aventis Deutschland Gmbh Medication delivery device

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Publication number Priority date Publication date Assignee Title
CN104884107A (en) * 2012-11-02 2015-09-02 欧文蒙福德有限公司 Injection devices
CN113747932A (en) * 2019-05-07 2021-12-03 益首药物治疗股份公司 Dosing device for an injection device

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