CN219092579U

CN219092579U - Exhaust piston for dispensing needle cylinder

Info

Publication number: CN219092579U
Application number: CN202320046664.6U
Authority: CN
Inventors: 苏筱林; 束春雨
Original assignee: Suzhou Hengyuan Micro Control Technology Co ltd
Current assignee: Suzhou Hengyuan Micro Control Technology Co ltd
Priority date: 2023-01-06
Filing date: 2023-01-06
Publication date: 2023-05-30
Anticipated expiration: 2033-01-06

Abstract

The application relates to the field of product dispensing, especially, relate to an exhaust piston for dispensing needle cylinder, it is including being used for with dispensing needle cylinder body inner chamber wall sliding connection's scraper subassembly, be connected with the piston head on the scraper subassembly, the last guide glue groove that has seted up of piston head, the scraper subassembly with be formed with between the piston head with the scraper groove of guide glue groove intercommunication, just the scraper subassembly with the piston head is jointly offered and is subtracted heavy groove, the scraper tank bottom portion seted up with subtract the exhaust hole of heavy groove intercommunication. The application has the effect of being convenient for prevent extravagant glue.

Description

Exhaust piston for dispensing needle cylinder

Technical Field

The application relates to the field of product dispensing, in particular to an exhaust piston for a dispensing needle cylinder.

Background

At present, a dispensing needle cylinder is often used for dispensing products.

The dispensing needle cylinder in the prior art comprises a needle cylinder body, a dispensing needle head is detachably connected to a glue outlet of the needle cylinder body, a piston is connected in an inner cavity of the needle cylinder body in a sliding manner, and a telescopic piece for driving the piston to move in the inner cavity of the needle cylinder body is connected to the piston; the piston comprises a double scraper member which is connected with the inner cavity wall of the needle cylinder body in a sliding way, a piston head is connected to the double scraper member, and a scraper groove is formed between the double scraper member and the piston head; in practice, glue is injected into the inner cavity of the syringe body from the glue outlet, in the process of injecting the glue, the piston moves in the direction away from the glue outlet under the extrusion action of the glue until moving to a preset position, then the glue dispensing needle head is arranged on the glue outlet, and then the piston is pushed to move towards the glue outlet by the telescopic piece, so that the glue in the inner cavity of the syringe body is extruded to flow out from the glue dispensing needle head and drop at the preset glue dispensing position, and the glue dispensing process is realized.

In the course of implementing the present application, it has been found that the above technique has at least the following problems: before glue is injected into the inner cavity of the syringe body, air residues exist between the glue outlet and the piston, in the process of injecting the glue into the inner cavity of the syringe body, the residual air can be extruded to the scraper groove to remain by the glue, the remaining air can enter the glue to form bubbles in the process of dispensing the glue and react with the glue, so that the glue is deteriorated, and the waste of the glue can be caused.

Disclosure of Invention

In order to prevent extravagant glue, this application provides a point to glue exhaust piston for cylinder.

The application provides a point is exhaust piston for rubber needle cylinder adopts following technical scheme:

the utility model provides an exhaust piston for dispensing needle cylinder, includes the scraper subassembly that is used for with dispensing needle cylinder body inner chamber wall sliding connection, be connected with the piston head on the scraper subassembly, the last glue groove that has seted up of piston head, the scraper subassembly with be formed with between the piston head with the scraper groove of glue groove intercommunication, just the scraper subassembly with the scraper head is jointly offered and is subtracted heavy groove, the scraper tank bottom portion seted up with subtract the exhaust hole of heavy groove intercommunication.

Through adopting above-mentioned technical scheme, glue in injecting the gluey cylinder body inner chamber from the glue outlet can pass through the rate guide glue groove and get into the scraper groove to make the residual air between original glue outlet and the piston and the residual air extrusion in the original guide glue groove to the scraper groove in, in the further injection process of glue, in the exhaust hole row of gathering in the scraper groove gets into the weight reduction groove from the scraper groove bottom in the residual air, so be convenient for prevent in the residual air gets into the glue take place and make the rotten reaction of glue, thereby be convenient for prevent extravagant glue.

In a specific embodiment, the scraper assembly includes a front scraper slidably coupled to the inner cavity wall of the dispensing syringe body, the front scraper defining the scraper slot with the piston head.

Through adopting above-mentioned technical scheme, be convenient for through preceding scraper at the gliding in-process on the gluey cylinder body inner chamber wall of preceding scraper, scrape the glue of getting gluey cylinder body inner chamber wall adhesion on to be convenient for prevent glue and adhere to on gluey cylinder body inner chamber wall, so be convenient for when guaranteeing that gluey cylinder body inner chamber wall is clean, still be convenient for prevent glue extravagant.

In a specific embodiment, the diameter of the piston head is smaller than the diameter of the inner cavity of the dispensing syringe body.

Through adopting above-mentioned technical scheme, because the diameter of piston head is less than the inner chamber diameter of some glued needle cylinder body, so the piston head can not be with the inner chamber wall contact of some glued needle cylinder body when moving in the inner chamber of some glued needle cylinder body to the frictional force when being convenient for reduce scraper assembly and remove in some glued needle cylinder body inner chamber, the smoothness when being convenient for promote scraper assembly and remove in some glued needle cylinder body inner chamber like this.

In a specific implementation, the scraper assembly further comprises a ring groove body connected with the front scraper, and one end of the ring groove body, which is far away from the front scraper, is further connected with a rear scraper which is in sliding connection with the inner cavity wall of the dispensing syringe body.

By adopting the technical scheme, the scraper component is driven by the driving piece and extruded by glue, the ring groove body part can generate microprotrusion deformation, and as the ring groove body is of a groove body structure, the microprotrusion deformation can not happen in time and can not be abutted with the inner cavity wall of the dispensing syringe body, so that a gap can not be produced between the ring groove body and the inner cavity wall of the dispensing syringe body, external air can be prevented from entering the glue through the scraper component, and the glue and air reaction deterioration can be prevented conveniently; and can realize the secondary of point gum needle cylinder body inner chamber wall adhesion glue and scrape through the back scraper and get to be convenient for prevent further that the point gum needle cylinder body inner chamber wall from adhering glue on, so be convenient for prevent extravagant glue.

In a specific embodiment, a connecting groove body for connecting with the telescopic piece is arranged in the weight reducing groove.

By adopting the technical scheme, the connection with the telescopic piece is conveniently established through the connecting groove body, so that the telescopic piece is convenient for driving the scraper component and the piston head.

In a specific embodiment, a reinforcing rib is connected between the groove wall of the weight-reducing groove and the connecting groove body.

Through adopting above-mentioned technical scheme, be convenient for promote the structural stability of whole exhaust piston for dispensing cylinder through the strengthening rib.

In a specific embodiment, the diameter of the vent is no greater than 0.15mm and no less than 0.05mm.

Through adopting above-mentioned technical scheme, be convenient for make the residual air discharge through the exhaust hole to can be convenient for prevent glue and spill.

In a specific embodiment, the number of the glue guiding grooves is not less than 3.

Through adopting above-mentioned technical scheme, be convenient for make glue get into the scraper groove extrusion air through leading the gluey groove.

In summary, the present application includes at least one of the following beneficial technical effects:

1. glue is convenient to prevent from being wasted;

2. the smoothness of the scraper component when moving in the inner cavity of the dispensing needle cylinder body is convenient to improve;

3. the structural stability of the exhaust piston for the whole dispensing needle cylinder is convenient to improve.

Drawings

Fig. 1 is a schematic overall structure of an exhaust piston for a dispensing syringe according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram for embodying the position of the weight-reduction groove in the embodiment of the present application.

Fig. 3 is a schematic structural diagram for showing a positional relationship between a glue guiding groove and a corresponding vent hole in an embodiment of the present application.

Reference numerals illustrate: 1. a scraper assembly; 11. a ring groove body; 12. a front scraper; 13. a rear scraper; 2. a piston head; 21. a glue guiding groove; 3. a scraper groove; 31. an exhaust hole; 4. a weight reduction groove; 5. a connecting groove body; 6. reinforcing ribs.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses an exhaust piston for a dispensing needle cylinder. Referring to fig. 1, the exhaust piston for the dispensing syringe comprises a scraper assembly 1 which is slidably connected with the inner cavity wall of the dispensing syringe body, a piston head 2 is coaxially connected to the scraper assembly 1, a scraper groove 3 is formed at the joint of the scraper assembly 1 and the piston, a weight reduction groove 4 is formed in the scraper assembly 1 and the piston head 2 together, and an exhaust hole 31 communicated with the weight reduction groove 4 is formed in the bottom wall of the scraper groove 3 in combination with fig. 3. It should be noted that, in the initial state, the dispensing needle is detachably connected to the dispensing outlet of the dispensing syringe body, and the piston head 2 in the inner cavity of the dispensing syringe body is tightly attached to the dispensing outlet.

Referring to fig. 1, the scraper assembly 1 comprises an annular groove body 11, wherein a front scraper 12 is coaxially and integrally formed at one end of the annular groove body 11 close to the piston head 2, and the edge of the front scraper 12 far away from the annular groove body 11 is used for being in sliding connection with the inner cavity wall of the dispensing syringe body; the end of the ring groove body 11 far away from the piston head 2 is coaxially and integrally formed with a rear scraper 13, and the edge of the rear scraper 13 far away from the ring groove body 11 is also used for being in sliding connection with the inner cavity wall of the dispensing syringe body; the diameters of the edges of the front scraper 12 and the rear scraper 13 far away from the ring groove body 11 are consistent, and the diameters of the edges are equal to the diameters of the inner cavities of the dispensing syringe body.

The inner wall of the front scraper 12 is coaxially connected with the piston head 2, and the scraper grooves 3 are formed between the front scraper 12 and the piston head 2, it is to be noted that the diameter of the piston head 2 is smaller than the inner cavity diameter of the dispensing syringe body, at least three glue guiding grooves 21 are formed on the outer wall of the piston head 2 along the direction from the top end of the piston head 2 to the front scraper 12, in this embodiment, 4 glue guiding grooves 21 are uniformly formed on the outer wall of the piston head 2, and one ends of the four glue guiding grooves 21 far away from the top end of the piston head 2 are all communicated with the scraper grooves 3; referring to fig. 3, four exhaust holes 31 are uniformly formed in the bottom wall of the glue guiding groove 21, each exhaust hole 31 corresponds to two glue guiding grooves 21 closest to the exhaust hole 31, and each exhaust hole 31 is located at a position corresponding to the middle of the bottom ends of two glue guiding grooves 21. It should be noted that, the diameter of each vent hole 31 is in the range of 0.05mm to 0.15mm, and is not particularly limited, and in this embodiment, the diameter of each vent hole 31 is 0.1mm.

Referring to fig. 2, a connection groove body 5 for connection with a driving member is coaxially fixed to the bottom wall of the weight-reducing groove 4, four reinforcing ribs 6 are connected between the groove wall of the weight-reducing groove 4 and the outer wall of the connection groove, and the four reinforcing ribs 6 are uniformly arranged around the connection groove body 5.

The implementation principle of the exhaust piston for the dispensing needle cylinder is as follows: before injecting glue into the inner cavity of the dispensing syringe body, taking down the dispensing needle head on the dispensing outlet of the dispensing syringe body, injecting glue into the inner cavity of the dispensing syringe body through the dispensing outlet, synchronously entering the scraper groove 3 through the four glue guiding grooves 21 at the same time, and then further flowing the glue from the bottom ends of every two adjacent glue guiding grooves 21 to the corresponding vent holes 31, wherein in the process, the air originally remained in the dispensing outlet and the glue guiding grooves 21 flows towards the vent holes 31 under the extrusion of the glue, and when the glue is intersected in the vent holes 31, the originally remained air can be completely discharged from the vent holes 31; along with the increase of glue injection into the inner cavity of the dispensing needle cylinder body, the glue can continuously squeeze the piston head 2, then the piston head 2 and the scraper component 1 connected to the piston head 2 are driven to move in the direction away from the glue outlet until the glue is moved to a preset position, and then the dispensing needle head is arranged on the glue outlet; when the dispensing is needed, the scraper assembly 1 and the piston head 2 connected to the scraper assembly 1 are driven to move towards the direction of the dispensing outlet through the driving piece, so that the glue is conveniently extruded to move towards the dispensing needle through the scraper assembly 1 and the piston head 2, the glue flows out from the dispensing needle and falls to the preset dispensing position, and the whole dispensing process can be realized.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. An exhaust piston for a dispensing needle cylinder is characterized in that: including scraper subassembly (1) that is used for with some glue cylinder body inner chamber wall sliding connection, be connected with piston head (2) on scraper subassembly (1), glue guide groove (21) have been seted up on piston head (2), scraper subassembly (1) with be formed with between piston head (2) with scraper groove (3) of glue guide groove (21) intercommunication, just scraper subassembly (1) with jointly seted up in piston head (2) and subtract heavy groove (4), scraper groove (3) bottom seted up with exhaust hole (31) of subtracting heavy groove (4) intercommunication.

2. The vent piston for a dispensing syringe of claim 1, wherein: the scraper assembly (1) comprises a front scraper (12) which is in sliding connection with the inner cavity wall of the dispensing syringe body, and the scraper groove (3) is formed between the front scraper (12) and the piston head (2).

3. The vent piston for a dispensing syringe of claim 2, wherein: the diameter of the piston head (2) is smaller than the diameter of the inner cavity of the dispensing needle cylinder body.

4. A vent piston for a dispensing syringe as defined in claim 3, wherein: the scraper assembly (1) further comprises a ring groove body (11) connected with the front scraper (12), and one end, far away from the front scraper (12), of the ring groove body (11) is further connected with a rear scraper (13) in sliding connection with the inner cavity wall of the dispensing needle cylinder body.

5. The vent piston for a dispensing syringe of claim 1, wherein: the weight reduction groove (4) is internally provided with a connecting groove body (5) used for being connected with the telescopic piece.

6. The vent piston for a dispensing syringe of claim 5, wherein: reinforcing ribs (6) are connected between the groove walls of the weight reduction grooves (4) and the connecting groove bodies (5).

7. The vent piston for a dispensing syringe of claim 1, wherein: the diameter of the exhaust hole (31) is not higher than 0.15mm and not lower than 0.05mm.

8. The vent piston for a dispensing syringe of claim 1, wherein: the number of the glue guide grooves (21) is not less than 3.