CN117462802A - Seal for a metering assembly, metering assembly and atomizing device - Google Patents

Abstract

The invention relates to a seal for a metering assembly, a metering assembly and an atomizing device. The sealing piece comprises a fixed supporting part and a sealing part, wherein the sealing part is arranged at one end of the fixed supporting part and is fixedly connected with the fixed supporting part. The sealing element for the metering assembly can improve the sealing stability of the interior of the metering assembly, further improve the accuracy of liquid medicine metering, prolong the service life of the metering assembly, and reduce the production cost, and is simple to assemble.

Description

Seal for a metering assembly, metering assembly and atomizing device

Technical Field

The invention relates to the field of medical instruments, in particular to a sealing piece for a metering assembly, the metering assembly and an atomization device.

Background

Nebulizers are a medical product for administration by inhalation to patients and are in widespread use today.

The atomizing device is generally provided with a metering device for metering the chemical liquid. At present, most of devices for metering liquid medicine adopt a form of a supporting ring and a sealing ring to realize sealing between a guide tube and a conveying tube (for example, the sealing structure disclosed in patent with publication number CN 101300041B), and for the sealing structure, as a matching relationship exists between the supporting ring and the sealing ring, between the sealing ring and the guide tube, and between the sealing ring and the conveying tube, when the conveying tube performs piston movement in the guide tube, the sealing ring can slide or rotate, so that the sealing stability is influenced, the metering accuracy of the liquid medicine is further influenced, and the service life of the sealing ring is also influenced. In addition, because the support ring and the sealing ring are arranged in a split mode, the guide pipe is required to be assembled in batches according to different errors during installation, stability of assembled performance can be guaranteed, assembling difficulty is increased undoubtedly, and production cost is increased.

Disclosure of Invention

Based on the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a sealing member for a metering assembly, which can improve the sealing stability inside the metering assembly, further improve the accuracy of metering of the liquid medicine, further improve the service life thereof, and which is simple to assemble and can reduce the production cost.

Another object of the present invention is to provide a metering assembly that can improve the sealing stability of the interior thereof, thereby improving the accuracy of the metering of the liquid medicine.

Therefore, the invention provides the following technical scheme.

The present invention provides a seal for a metering assembly, the seal comprising:

a fixed support part;

and the sealing part is arranged at one end of the fixed supporting part and is fixedly connected with the fixed supporting part.

In at least one embodiment, the fixed support portion and the sealing portion are integrally formed or manufactured by way of an in-mold insert.

In at least one embodiment, the fixed support is formed with a groove in which the sealing part is embedded; or alternatively

The fixed support portion is formed with radial fretwork portion, the sealing portion is filled radial fretwork portion. In at least one embodiment, the material of the fixed support part is a plastic material; and/or

The sealing part is made of silica gel or rubber; and/or

The cross section of the sealing part is polygonal or circular.

In at least one embodiment, the outer circumferential surface of the fixed support portion is formed with an indication protrusion, which is asymmetric with respect to any radial plane.

The invention also provides a metering assembly comprising:

a guide tube;

the seal of any of the above embodiments, wherein the seal is connected to the guide tube.

In at least one embodiment, the guide tube is provided with a first mounting hole, the fixed support portion is provided with a first connecting column, the first connecting column is connected with the first mounting hole, and the sealing portion abuts against the bottom surface of the first mounting hole.

In at least one embodiment, the first connection post and the sealing portion form an integral axial length that is greater than the depth of the first mounting hole before the sealing member is not mounted to the guide tube;

after the seal is mounted to the guide pipe, the first connection post and the seal portion form an integral axial length equal to the depth of the first mounting hole.

In at least one embodiment, the fixed support part further has a positioning part abutting against the guide pipe, the positioning part is arranged at one end of the first connecting column, which is far away from the sealing part,

the metering assembly further comprises a fixed cover, the fixed cover is provided with a pressing part, the fixed cover is fixedly connected with the guide pipe fitting, and the pressing part abuts against the positioning part.

In at least one embodiment, the fixed support further has a second connection post having a tapered outer peripheral surface,

the fixed cover has a second mounting hole,

the second connecting column is inserted into the second mounting hole, one end of the conical outer circumferential surface with a larger cross section is connected with the second mounting hole, and one end of the conical outer circumferential surface with a smaller cross section is in clearance fit with the second mounting hole.

The invention also provides an atomization device, which comprises the metering assembly in any embodiment.

Advantageous effects

According to the sealing element for the metering assembly, the sealing part is fixedly connected with the fixed supporting part, so that the sealing part cannot relatively rotate or slide in the sealing part, the sealing stability and the accuracy of liquid medicine metering can be improved, and the service life of the sealing element can be prolonged; meanwhile, the sealing element is easy to assemble, batch matching assembly is not needed, the yield of assembly and the stability of assembly are effectively improved, and the assembly difficulty and the production cost can be reduced.

It will be appreciated that a metering assembly having a seal as described above will also have the technical effects described above.

Drawings

Fig. 1 shows a cross-sectional view of an atomizing device according to the present disclosure (only part of the structure is shown).

Fig. 2 shows an exploded view of the metering assembly of the present invention.

Fig. 3 shows an enlarged view of the portion a in fig. 1.

Fig. 4 shows a perspective view of the seal of the present invention.

Fig. 5 shows a perspective view of the fixed support of the present invention.

Fig. 5a to 5c show three different configurations of the seal according to the invention.

Fig. 6 shows a modification of the fixed support portion of the present invention.

Fig. 7a to 7c show three structural forms of the indication protrusion in the present invention.

Fig. 8a to 8c show three structural forms of the wall surface of the first mounting hole in the present invention.

Description of the reference numerals

10. A metering assembly; 20. a spray head assembly;

1. a seal; 11. a fixed support part; 111. a first connection post; 112. a groove; 113. a bracket; 1131. radial hollowed-out parts; 114. a positioning part; 1141. an indication protrusion; 115. a second connection post; 1151. a tapered outer peripheral surface; 12. a sealing part;

2. a guide tube; 21. a first mounting hole; 211. an axial hole wall surface; 212. radial hole wall surface; 213. an arc surface; 214. an inclined plane;

3. a fixed cover; 31. a pressing part; 32. and a second mounting hole.

Detailed Description

In order to make the technical scheme and the beneficial effects of the invention more obvious and understandable, the following detailed description is given by way of example. Unless defined otherwise, technical and scientific terms used herein have the same meaning as technical and scientific terms in the technical field to which this application belongs.

In the description of the present invention, unless explicitly defined otherwise, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience of simplifying the description of the present invention, and do not indicate that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, i.e., are not to be construed as limiting the present invention.

In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as relative importance of the features indicated or the number of technical features indicated. Thus, a feature defining "first", "second" may explicitly include at least one such feature. In the description of the present invention, "plurality" means at least two; "plurality" means at least one; unless otherwise specifically defined.

In the present invention, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly, unless otherwise specifically limited. For example, "connected" may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, or can be communicated between two elements or the interaction relationship between 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.

In the present invention, unless explicitly defined otherwise, a first feature "on", "above", "over" and "above", "below" or "under" a second feature may be that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact via an intermediary. Moreover, a first feature "above," "over" and "on" a second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the level of the first feature is higher than the level of the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the level of the first feature is less than the level of the second feature.

A specific embodiment of the atomizing device according to the present invention is described in detail below with reference to fig. 1 to 8.

In this embodiment, as shown in fig. 1, the atomizing device of the present invention includes a metering assembly 10 and a spray head assembly 20. Wherein, the metering assembly 10 is connected with the spray head assembly 20, and the liquid medicine metered in the metering assembly 10 is sprayed out of the spray head assembly 20 to realize the administration.

In the present embodiment, as shown in fig. 2 and 3, the metering assembly 10 includes a seal member 1, a guide tube member 2, and a fixed cover 3. Wherein the sealing element 1 and the fixed cover 3 are connected with the guide pipe fitting 2, and the sealing element 1 is partially positioned between the guide pipe fitting 2 and the fixed cover 3 in the axial direction of the metering assembly 10 and is pressed by the fixed cover 3.

As shown in fig. 4 and 5, the seal member 1 includes a fixed support portion 11 and a seal portion 12, the seal portion 12 is provided at one end of the fixed support portion 11, and the seal portion 12 is fixedly connected with the fixed support portion 11. The sealing portion 12 and the fixed supporting portion 11 may be integrally formed or integrally connected by an in-mold insert, or may be integrally connected by adhesion, welding or clamping.

As shown in fig. 5, the fixed support 11 includes a first connection post 111, and a groove 112 is formed on an outer circumferential surface of the first connection post 111. In the present embodiment, the sealing part 12 is formed on the first connection post 111 in an injection molding manner, and the sealing part 12 is embedded in the groove 112, which is advantageous in that the connection stability between the sealing part 12 and the fixing support part 11 is improved, and the separation of the two is prevented. Of course, the present invention is not limited thereto, and the sealing portion 12 may be provided by being fitted into the groove 112 by welding, heat-fusing, or bonding. Further, the cross-section of the sealing portion 12 may be generally rectangular (as shown in fig. 5 a), circular (as shown in fig. 5 b), trapezoidal (as shown in fig. 5 c), or other polygonal shape.

Fig. 6 shows a modification of the fixed support portion 11, and as shown in fig. 5, the fixed support portion 11 includes a first connection post 111, one end of the first connection post 111 is provided with a bracket 113, and the bracket 113 is formed with a radial hollowed-out portion 1131. The sealing part 12 is arranged on the bracket 113 in an injection molding mode, and the sealing part 12 fills the radial hollowed-out part 1131 of the bracket 113 and covers the bracket 113. This can enhance the stability of the connection between the sealing portion 12 and the fixed supporting portion 11, preventing the separation of the two. Of course, the present invention is not limited thereto, and the sealing portion 12 may be provided so as to cover the bracket 113 by filling the hollowed-out portion of the bracket 113 by welding, hot-melting, or bonding. In addition, it should be understood that the bracket 113 shown in fig. 6 may be separately provided, and a hollowed-out portion may be directly formed at one end of the first connection post 111 for filling and blending the sealing portion 12.

As shown in fig. 4, the fixed support portion 11 further includes a positioning portion 114, and an indication protrusion 1141 is formed on an outer peripheral surface of the positioning portion 114. The indication protrusions 1141 may be saw-tooth, trapezoid, circular arc, or other shapes. The surface of one axial side of the saw-tooth-shaped indication protrusion 1141 may be perpendicular to the outer circumferential surface of the positioning portion 114, the surface of the other axial side may be configured as a slope (as shown in fig. 7 a) or a curved surface (as shown in fig. 7 b), and the top of the saw-tooth-shaped indication protrusion 1141 may be sharp or flat (as shown in fig. 7a and 7 b) or may be arc-shaped (as shown in fig. 7 c). It should be appreciated that the indicator tab 1141 is disposed asymmetrically about any radial plane to indicate direction. Note that the indication protrusion 1141 is not necessarily provided, and if the fixing support part 11 and the sealing part 12 are connected by adhesion, welding or clipping, the indication protrusion 1141 may not be provided.

In the present embodiment, as shown in fig. 4, the indication protrusions 1141 are provided in two rows and are spaced apart from each other in the axial direction of the positioning portion 114. Of course, the invention is not limited thereto, and the indication protrusion 1141 may be only one, or 3, 4 or more. Further, the indicator tab 1141 may be formed in a complete ring shape, or may be formed in one or more arcuate shapes spaced apart from each other.

In the present embodiment, the material of the fixing support portion 11 is a plastic material (such as polyether ether ketone or polybutylene terephthalate) or other materials, and the material of the sealing portion 12 is a silica gel, rubber or other materials.

As shown in fig. 2 and 3, one end of the guide tube 2 is provided with a first mounting hole 21, and a first connection post 111 is inserted into the first mounting hole 21 to connect the sealing member 1 and the guide tube 2, and the sealing portion 12 abuts at least the hole bottom surface of the first mounting hole 21. The first connecting post 111 and the first mounting hole 21 may be connected in an interference fit, and the sealing portion 12 abuts against the hole side wall surface and the hole bottom surface of the first mounting hole 21, so that the sealing portion 12 is effectively prevented from being extruded and then enters into a gap matched with the hole, and sealing stability of the sealing portion 12 may be improved. The interference fit amount may be 0 to 0.2mm, preferably 0.02 to 0.07mm. Of course, the present invention is not limited to this, and the first connecting post 111 and the first mounting hole 21 may be clearance-fitted, and the sealing portion 12 may abut against the hole bottom surface of the first mounting hole 21.

In the present embodiment, the length of the whole formed by the first connection post 111 and the sealing portion 12 in a natural state (i.e., before being mounted into the first mounting hole 21) is greater than the depth of the first mounting hole 21. In this way, when the first connecting post 111 and the sealing portion 12 are inserted into the first mounting hole 21, the positioning portion 114 abuts against the end surface of the guide pipe member 2, and the sealing portion 12 is pressed to some extent, which is advantageous in improving the sealing property.

Further, as shown in fig. 2 and 3, the guide tube 2 includes an axial hole wall surface 211 and a radial hole wall surface 212 for defining the first mounting hole 21, and the sealing portion 12 abuts against the axial hole wall surface 211 and the radial hole wall surface 212. Preferably, the connection between the axial hole wall surface 211 and the radial hole wall surface 212 is transited by an arc surface 213 (as shown in fig. 8 a) or transited by an inclined surface 214 (as shown in fig. 8 b), which is beneficial to the sealing part 12 to better fit the axial hole wall surface 211 and the radial hole wall surface 212 and improve the tightness. Of course, the present invention is not limited thereto, and the axial hole wall surface 211 and the radial hole wall surface 212 may be directly connected perpendicular to each other (as shown in fig. 8 c).

In the present embodiment, as shown in fig. 2 and 3, the fixed cover 3 and the guide pipe 2 are fastened by screw. Of course, the invention is not limited to this, and the fixed cover 3 and the guide tube 2 may be clamped, welded or fixedly connected by other means.

The fixed cover 3 has a pressing portion 31, and the pressing portion 31 abuts against the positioning portion 114, and the positioning portion 114 abuts against the end face of the guide pipe 2.

As shown in fig. 3, the fixing support part 11 further includes a second connection post 115 having one end connected to the positioning part 114, and the fixing cover 3 has a second mounting hole 32, and the second connection post 115 is inserted into the second mounting hole 32. The second connection post 115 has a tapered outer peripheral surface 1151, where a cross section of an end of the tapered outer peripheral surface 1151 near the positioning portion 114 is larger, the end is in interference fit connection with the second mounting hole 32, the interference may be 0 to 0.2mm, preferably 0 to 0.1mm, and a cross section of the other end of the tapered outer peripheral surface 1151 far from the positioning portion 114 is smaller, and the other end is in clearance fit with the second mounting hole 32, where the clearance may be 0.02mm to 0.4mm. Thus, the above-mentioned clearance fit facilitates the fixing cap 3 to be sleeved on the second connecting post 115, and the above-mentioned interference fit facilitates the fixing cap 3 to better compress the sealing member 1, and may have better centering property. It is to be noted that, the end of the tapered outer peripheral surface 1151 near the positioning portion 114 may be in interference fit with the second mounting hole 32, or may be in clearance fit, or may be reasonably selected according to actual needs. In another embodiment, the angle between the tapered outer peripheral surface 1151 and the axis of the seal 1 may be 1 to 30 degrees, preferably 2 to 10 degrees.

By adopting the technical scheme, the invention has at least the following advantages:

(1) In the sealing element, the sealing part is fixedly connected with the fixed supporting part, so that the sealing part cannot relatively rotate or slide in the sealing part, the sealing stability and the accuracy of liquid medicine metering can be improved, and the service life of the sealing element can be prolonged; meanwhile, the sealing element is easy to assemble, batch matching assembly is not needed, the yield of assembly and the stability of assembly are effectively improved, and the assembly difficulty and the production cost can be reduced.

(2) In the sealing member of the present invention, by forming the groove on the fixed supporting portion for the sealing portion to be fitted in, the connection stability between the sealing portion and the fixed supporting portion can be improved.

(3) In the sealing element, the radial hollowed-out part is formed on the fixed supporting part for filling and merging the sealing part, so that the connection stability between the sealing part and the fixed supporting part can be improved.

(4) In the metering assembly, the first connecting column of the sealing element is in interference fit connection with the first mounting hole of the guide pipe fitting, so that the sealing stability of the sealing part can be improved.

(5) In the metering assembly, the length of the whole formed by the first connecting column and the sealing part in a natural state is larger than the depth of the first mounting hole, so that the sealing property of the sealing part to the guide pipe fitting is improved.

It should be understood that the above embodiments are exemplary and not intended to encompass all possible embodiments encompassed by the claims. Various modifications and changes may be made in the above embodiments without departing from the scope of the invention. Likewise, the individual technical features of the above embodiments may also be combined arbitrarily to form further embodiments of the invention which may not be explicitly described. Therefore, the above embodiments merely represent several embodiments of the present invention, and do not limit the scope of the present invention.

Claims (11)

1. A seal (1) for a metering assembly (10), the seal (1) comprising:

a fixed support (11);

and the sealing part (12) is arranged at one end of the fixed supporting part (11), and is fixedly connected with the fixed supporting part (11).

2. The seal (1) according to claim 1, characterized in that the fixed support (11) and the seal (12) are integrally formed or manufactured by means of an in-mold insert.

3. The seal (1) according to claim 1, characterized in that the fixed support (11) is formed with a groove (112), the seal (12) being embedded in the groove (112); or alternatively

The fixed support part (11) is provided with a radial hollowed-out part (1131), and the sealing part (12) fills the radial hollowed-out part (1131).

4. The seal (1) according to claim 1, characterized in that the material of the fixed support (11) is a plastic material; and/or

The sealing part (12) is made of silica gel or rubber; and/or

The cross section of the sealing part (12) is polygonal or circular.

5. The seal (1) according to claim 1, characterized in that the outer peripheral surface of the fixed support portion (11) is formed with an indication protrusion (1141), the indication protrusion (1141) being asymmetric with respect to any radial plane.

6. A metering assembly (10), characterized in that the metering assembly (10) comprises:

a guide tube (2);

the seal (1) of any one of claims 1 to 5, the seal (1) being connected with the guide tube (2).

7. The metering assembly (10) according to claim 6, wherein the guide tube (2) is provided with a first mounting hole (21), the fixed support (11) is provided with a first connecting post (111), the first connecting post (111) is connected with the first mounting hole (21), and the sealing part (12) abuts against the hole bottom surface of the first mounting hole (21).

8. The metering assembly (10) according to claim 7, characterized in that the first connection post (111) and the sealing portion (12) form an integral axial length that is greater than the depth of the first mounting hole (21) before the seal (1) is not mounted to the guide tube (2);

after the sealing member (1) is mounted to the guide pipe member (2), the first connecting column (111) and the sealing portion (12) form an integral axial length equal to the depth of the first mounting hole (21).

9. The metering assembly (10) as claimed in claim 7, characterized in that the stationary support (11) further has a positioning portion (114) abutting the guide tube (2), the positioning portion (114) being arranged at the end of the first connecting column (111) facing away from the sealing portion (12),

the metering assembly (10) further comprises a fixed cover (3), the fixed cover (3) is provided with a pressing part (31), the fixed cover (3) is fixedly connected with the guide pipe fitting (2), and the pressing part (31) abuts against the positioning part (114).

10. The metering assembly (10) as claimed in claim 9 wherein the fixed support (11) further has a second connecting post (115), the second connecting post (115) having a tapered outer peripheral surface (1151),

the fixed cover (3) is provided with a second mounting hole (32),

the second connecting post (115) is inserted into the second mounting hole (32), one end with a larger cross section of the conical outer circumferential surface (1151) is connected with the second mounting hole (32), and one end with a smaller cross section of the conical outer circumferential surface (1151) is in clearance fit with the second mounting hole (32).

11. An atomising device, characterized in that it comprises a metering assembly (10) according to any one of claims 6 to 10.