CN213220060U - Injection button connecting structure - Google Patents
Injection button connecting structure Download PDFInfo
- Publication number
- CN213220060U CN213220060U CN202021348488.4U CN202021348488U CN213220060U CN 213220060 U CN213220060 U CN 213220060U CN 202021348488 U CN202021348488 U CN 202021348488U CN 213220060 U CN213220060 U CN 213220060U
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- China
- Prior art keywords
- button
- driving part
- bulge
- slotted hole
- dose
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Abstract
The utility model relates to an injection button connecting structure, which comprises a driving part and a button matched with the driving part, wherein the driving part is combined with a dosage scale cylinder, and the dosage scale cylinder is in spiral matching connection with a shell; the drive assembly has inwards seted up the cylinder slotted hole, and the cylinder slotted hole has the bottom surface, and circular arc groove has been seted up along radial indent in the middle part of the cylinder slotted hole, and the button is including the bulge that has the top surface, and the lower extreme of this bulge sets up radially extending flange and bottom, and the totally embedded assembly of bulge is in the cylinder slotted hole, and the clearance fit of extending flange is in the circular arc inslot, accomplishes the relative cooperation between drive assembly and the button.
Description
Technical Field
The utility model belongs to the technical field of injection equipment, concretely relates to injection button connection structure.
Background
There is now disclosed an insulin injection device in which a dose is set by unscrewing a metering scale drum out of a threadedly connected housing. When injecting the set dose, the user pushes the button, driving the metering scale drum and the sleeve to rotate together back into the housing. During rotation of a sleeve connected to the button, the button and the sleeve rotate relative to each other. The friction generated between these relatively rotating parts necessitates a great deal of effort by the user, and in order to reduce the effort, special structures are designed between the push button and the drive element to reduce the kinetic friction.
Disclosure of Invention
An object of the utility model is to provide a dose button connects for injection equipment to reduce the used power of user's injection dose.
In particular to an injection button connecting structure,
the dose setting mechanism comprises a driving part and a button which is matched and installed with the driving part, wherein the driving part is combined with a dose scale drum, and the dose scale drum is in spiral matching connection with a shell;
the method is characterized in that: wherein the driving part is internally provided with a cylindrical slotted hole which is provided with a bottom surface, the middle part of the cylindrical slotted hole is inwards provided with an arc groove along the radial direction,
the button comprises a projecting portion having a top surface, the lower end of the projecting portion being provided with a radially extending flange, the bottom of the projecting portion having a bottom end,
the protruding part is completely embedded and assembled in the cylindrical groove hole, and the extending flange is assembled in the arc groove in a clearance mode to complete the relative fit between the driving part and the button.
Further, the button upper end comprises a pressing surface for contact by a user's finger when injecting a dose;
furthermore, the periphery of the upper part of the convex part is provided with a belt body structure with a slightly convex diameter,
further, the top surface is of an arc-shaped structure;
the bottom end has a reduced diameter compared to an upper portion of the projection.
Further, the push button is made of a suitable polymer material that is the same or softer than the drive member.
Has the advantages that:
the utility model has the advantages of simple and reasonable structure, the extension flange through the bulge of button imbeds the downthehole circular arc inslot of cylinder of driver part, realizes button and driver part's reliable combination.
The upper belt body structure of the convex part of the button and the bottom with the reduced diameter are respectively combined with the upper part and the lower part of the cylindrical hole of the driving part to form an upper radial bearing and a lower radial bearing, the radial bearing structure greatly reduces the friction force generated when the button and the driving part do relative rotation movement,
the protruding part of the button is provided with a top surface in an arc-shaped structure, the top surface is in small point-shaped area contact with the bottom surface of the cylindrical hole of the driving part, and the small point-shaped area contact is beneficial to reducing the friction force generated when the driving part and the button perform relative rotation motion.
Drawings
Figure 1 shows a cross-sectional view of the connection between the push button and the actuation part.
Figure 2 shows a cross-sectional view of the connection between the drive member and the dose dial sleeve.
Fig. 3 shows a cross-sectional view of the connection and the resulting force.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe in further detail common embodiments of the present invention with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
As shown in fig. 1-3:
a connecting structure of an injection button is provided,
comprises a driving part 20 and a button 10 which is matched and installed with the driving part, the driving part 20 is combined with a dose scale drum 30, and the dose scale drum is in screw fit connection with a shell 40;
wherein the driving part 20 is provided with a cylindrical slot 21 inwards, the cylindrical slot 21 is provided with a bottom surface 24, the middle part of the cylindrical slot is provided with an arc groove 22 inwards along the radial direction,
the button 10 comprises a bulge 12 with a top surface 16, the lower end of the bulge 12 is provided with a radial extending flange 14, the bottom of the bulge is provided with a bottom end 15, wherein the extending flange 14 is arranged at the lower periphery of the bulge 12;
the projection 12 fits fully snap-fit within the cylindrical slot 21 with the extending flange 14 fitting loosely within the arcuate slot 22, completing the relative fit between the actuation member and the button.
The upper periphery of the convex part 12 is provided with a belt body structure 13 with a slightly convex diameter, the upper belt body structure 13 of the convex part of the button and the bottom end 15 with a reduced diameter are respectively combined with the upper part and the lower part of the cylindrical hole of the driving part 20 to form an upper radial bearing and a lower radial bearing, and the radial bearing structure greatly reduces the friction force generated when the button and the driving part do relative rotation motion.
The bottom end 15 has a reduced diameter compared to the upper part of the bulge 12.
When the push button 10 is mounted in the cylindrical slot 21 of the driving member 20, it simply snaps so that the extension flange 14 enters the circular arc 22, and the resulting connection is difficult to disassemble. At the lower end position of the coupling of the push button 10 and the driving member, the pivot 17 formed on the top surface 16 of the projection 12 is supported on the bottom surface 24 of the cylindrical slot 21, thereby forming pivot bearings (24, 17). Furthermore, the band 13 of the push-button 10 at the upper projecting portion 12 is radially supported by the remaining portion 25 of the cylindrical slot 21, forming a radial top bearing (25, 13). The bottom end 15 of the projection 12 is radially supported by the bottom 23 of the cylindrical slot 21, forming a radial bottom bearing (23, 15).
When the user wishes to inject a pre-selected dose, the user pushes the button 10, moving the drive member 20 axially forward in the injection device. In this forward movement of the drive member 20, the dose dial cylinder is threadedly connected to the housing 40 because the drive member and the dose dial cylinder 30 are engaged, so that the drive member is also rotated and the combined axial movement and rotation of the drive member 20 causes the set dose to be expelled from the injection device.
The upper end of the button 10 comprises a pressing surface 11 which is contacted by the user's finger when injecting the dose; when a user's finger presses on the surface 11 of the button 10, the button 10 cannot be rotated due to friction between the user's finger and the button, however, the driving member 20 is forced to rotate due to its engagement, and thus, relative rotation is generated between the button 10 and the driving member 20.
The button 10 may be made of a suitable polymer material that is the same or softer than the material from which the actuation part 20 is made. Or a material that has been surface treated to reduce internal friction.
In fig. 3, the connection of the push button 10 is shown with the various forces therein that are generated when the user applies an injection force on the pressing surface 11 of the push button.
When the user applies the injection force Fa on the pressing surface of the push button 10, a vertical reaction force Fb will be generated at the pivot point (24, 17), while a radial force Fd will be generated at the bottom radial bearing (23, 15), the resulting relative rotational torque being relatively small because the bottom radial bearing (23, 15) is located on the bottom end 15 having a relatively small diameter. Furthermore, at the upper radial bearing (25, 13) a radial force Fc will be generated, but due to the distance between the upper radial bearing (25, 13) and the lower radial bearing (23, 15) a smaller force is generated at the upper radial bearing (25, 13).
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes made to the above embodiments according to the utility model all still belong to the protection scope of the technical scheme of the utility model.
Claims (4)
1. A connecting structure of an injection button is provided,
the dose setting mechanism comprises a driving part (20) and a button (10) which is matched and installed with the driving part, wherein the driving part (20) is combined with a dose scale drum (30), and the dose scale drum is in spiral matching connection with a shell (40);
the method is characterized in that: wherein the driving part (20) is internally provided with a cylindrical slotted hole (21), the cylindrical slotted hole (21) is provided with a bottom surface (24), the middle part of the cylindrical slotted hole is inwards provided with an arc groove (22) along the radial direction,
the button (10) comprises a bulge (12) with a top surface (16), the lower end of the bulge (12) is provided with a radial extending flange (14), the bottom of the bulge is provided with a bottom end (15), the bulge (12) is completely embedded and assembled in a cylindrical groove hole (21), the extending flange (14) is assembled in an arc groove (22) in a clearance mode, and the relative fit between the driving part and the button is completed.
2. An injection button attachment structure as defined in claim 1, wherein:
the upper end of the button (10) comprises a pressing surface (11) for the user's finger to contact when injecting a dose.
3. An injection button attachment structure as defined in claim 1, wherein:
the upper periphery of the convex part (12) is provided with a belt body structure (13) with a slightly convex diameter.
4. An injection button attachment structure as defined in claim 1, wherein:
the top surface (16) is of an arc-shaped structure;
the bottom end (15) has a reduced diameter compared to the upper part of the protruding portion (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021348488.4U CN213220060U (en) | 2020-07-10 | 2020-07-10 | Injection button connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021348488.4U CN213220060U (en) | 2020-07-10 | 2020-07-10 | Injection button connecting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213220060U true CN213220060U (en) | 2021-05-18 |
Family
ID=75888516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021348488.4U Active CN213220060U (en) | 2020-07-10 | 2020-07-10 | Injection button connecting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213220060U (en) |
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2020
- 2020-07-10 CN CN202021348488.4U patent/CN213220060U/en active Active
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