CN220905393U - Needle sleeve for mounting filling needle, pharmaceutical filling machine and prefilled needle filling line - Google Patents

Abstract

The utility model relates to the field of medicine filling, and provides a needle sleeve for installing a filling needle, a pharmaceutical filling machine and a prefilled needle filling line, wherein the prefilled needle filling line comprises a conveying mechanism and the filling machine, the filling machine comprises a filling needle and a needle sleeve, the needle sleeve comprises a needle sleeve body and a limiting part, the needle sleeve body is provided with a containing groove and a containing through hole which are sequentially arranged along the length direction of the needle sleeve body, the needle sleeve body is also provided with an open slot which is arranged along the length direction, the open slot is communicated with the containing groove and the containing through hole from the surface of the needle sleeve body in the radial direction, at least one end of the open slot corresponding to the containing groove is penetrated in the two ends of the length direction, the open slot is used for allowing a needle tube of the filling needle to enter the containing through hole from the radial direction, and a canning head can enter the containing groove, and friction between a needle head of the filling needle and the needle sleeve body is reduced or avoided; the limiting part is used for limiting the filling needle on the needle sleeve body, so that the filling needle is prevented from being separated from the needle sleeve.

Description

Needle sleeve for mounting filling needle, pharmaceutical filling machine and prefilled needle filling line

Technical Field

The utility model relates to the field of medicine filling, in particular to a needle sleeve for installing a filling needle, a pharmaceutical filling machine and a prefilled needle filling line.

Background

The filling machine is suitable for the field of biological pharmacy, is mainly used for liquid injection and solid injection, and is used for a preparation filling procedure with higher requirements on aseptic control, and the procedure is to fill stock solution into a penicillin bottle or an injection needle tube through a filling needle.

Fig. 1 shows a conventional filling needle, in which, as shown in fig. 1, the filling needle 1 includes a filling head 11 and a needle tube 12 sequentially arranged along a length direction thereof, a filling hole 13 (see the filling needle portion in fig. 9-11) penetrating along the length direction is provided in the filling head 11, the filling head 11 includes a pagoda segment 111, a clamping groove segment 112, and a transition segment 113 sequentially arranged, the clamping groove segment 112 has a clamping groove 1121, and the end of the needle tube 12 is a needle 121.

During the filling process, it is necessary to protect the needle of the filling needle from contact with other articles during the execution of the product filling.

At present, on a prefilled needle filling line, a needle sleeve is mostly used for fixing a filling needle, and a needle sleeve body, namely a needle sleeve body, is provided with an accommodating groove and an accommodating through hole which are sequentially arranged along the length direction of the needle sleeve body, wherein the accommodating groove is used for accommodating a filling head, and the accommodating through hole is used for accommodating a needle tube; the length of the filling needle is slightly longer than that of the needle sleeve body, and after the filling needle is arranged on the needle sleeve, the filling head at one end of the filling needle slightly extends out of one end of the needle sleeve body, and the needle head at the other end of the filling needle slightly extends out of the other end of the needle sleeve body.

When the filling needle is arranged in the needle sleeve body, the needle head of the filling needle is often rubbed with the inner surface of the needle sleeve body, particles are easy to generate, the sterility of products generated on the filling line of the pre-filling needle, visible foreign matters and the like are poor in quality, and the performance of the products is affected.

Disclosure of utility model

The utility model aims to overcome the defect of poor product quality on a prefilled needle filling line in the prior art, and provides a needle sleeve for installing a filling needle, a pharmaceutical filling machine and a prefilled needle filling line.

The utility model solves the technical problems by the following technical scheme:

a needle hub for mounting a filling needle, comprising:

The needle sleeve comprises a needle sleeve body, a needle tube and a needle tube, wherein the needle sleeve body is provided with an accommodating groove and an accommodating through hole which are sequentially arranged along the length direction of the needle sleeve body, and is also provided with an open slot which is arranged along the length direction in an extending manner, the open slot is communicated with the accommodating groove and the accommodating through hole from the surface of the needle sleeve body in the radial direction, at least one end of the open slot corresponding to the accommodating groove in two ends of the length direction is penetrated, and the open slot is used for a needle tube of a filling needle to enter the accommodating through hole and the accommodating groove from the radial direction;

And the limiting part is used for limiting the filling needle on the needle sleeve body.

In this scheme, hold the filling head that the recess is used for holding the filling needle, hold the needle tubing that the through-hole is used for holding the filling needle. Through setting up the open slot, the open slot communicates to holding the through-hole from the surface of needle cover body, when installing the filling needle on the needle cover body, can install along radial direction, put into the needle tubing in the holding through-hole of needle cover body from the open slot department to avoid or reduce the contact and the friction of the syringe needle of filling needle and needle cover body, avoid or reduce production visible foreign matter or biological pollution. The open slot is penetrated at least at one end corresponding to the accommodating groove in the two ends of the length direction, so that the needle tube of the filling needle can enter the accommodating groove from the open slot along the radial direction, and the filling head can be placed into the accommodating groove. The filling needle is limited on the needle sleeve body through the limiting part, so that the filling needle can be prevented from being separated from the needle sleeve body in the production process, the production efficiency of filling is improved, the degerming and filtering time of a product is reduced, and the quality and the production cost of the product are improved.

Preferably, the open slot penetrates through two ends of the needle sleeve body in the length direction;

And/or the open slot is a straight slot extending along the length direction.

In this scheme, the open slot is at the both ends of length direction through needle cover body, has further improved the convenience of open slot processing, has improved the convenience of packing into needle cover body from radial direction with the needle tubing.

The open slot is straight slot, simple structure, processing is convenient, improves the needle tubing simultaneously and gets into the convenience of holding the through-hole from the open slot.

When the open slot is a straight slot and penetrates through the two ends of the needle sleeve body in the length direction, the convenience of open slot processing and the convenience of filling needle installation are further improved.

Preferably, the bottom of the open slot along the radial direction is in a horn shape with an opening facing the outer surface of the needle sleeve body;

And/or the limiting part is used for fixing the filling needle on the needle sleeve body.

In this scheme, open slot bottom is loudspeaker form, can play the guide effect, and the needle tubing of being convenient for gets into from the open slot and holds the through-hole.

The filling needle is fixed on the needle sleeve body by the limiting part, so that the movement of the filling needle relative to the needle sleeve body can be avoided, and the reliability of the filling needle on the needle sleeve can be further improved.

Preferably, the limiting part includes:

the first limiting part is used for limiting the filling head of the filling needle in the accommodating groove;

and/or the second limiting part is used for limiting the needle tube in the accommodating through hole.

In the scheme, the radial dimension of the filling head is larger than that of the needle tube, and the filling head is limited in the accommodating groove through the first limiting part, so that the needle sleeve is convenient to process, and the limiting operation of the filling head is convenient; the filling head is located filling needle length direction's one end, and is spacing in holding the recess with the filling head through first limit part, can make filling needle length direction's one end spacing reliable, improves filling needle and installs the reliability on the needle cover.

The needle tube of the filling needle can be limited by the second limiting part, and the stability of the filling needle on the needle sleeve can be improved by setting the position of the second limiting part.

Simultaneously, the first limiting part and the second limiting part are arranged to limit the filling head and the needle tube, so that a plurality of positions of the filling needle in the length direction are limited on the needle sleeve, and the reliability of the filling needle on the needle sleeve can be further improved.

Preferably, the side wall of the accommodating groove is provided with a mounting hole, the first limiting part comprises a marble and an elastic piece, one end of the elastic piece in the extending direction and the needle sleeve body are fixedly connected to the mounting hole, the other end of the elastic piece and the marble are fixedly connected, and the marble is used for extending into a clamping groove of the filling head;

Or, the first limiting part is used for fixing the filling head of the filling needle in the accommodating groove.

In this scheme, adopt marble and elastic component to spacing filling head in holding the recess, simple structure, spacing reliable, the dress is got conveniently. The marble and the elastic piece have self-locking function, can fix the filling needle on the needle sleeve, and when continuous execution is operated, the filling needle is always in a fixed state in the needle sleeve and does not displace, and when the filling needle is operated along with the needle sleeve in the production process, the filling needle can be prevented from being contacted with other structures, so that the process stability and the product quality are improved.

The filling head of the filling needle is thicker than the needle tube, and the filling needle is fixed on the needle sleeve body through the filling head, so that the filling needle is fixed on the needle sleeve body, and the process is easier to realize.

Preferably, the accommodating groove comprises a first groove and a second groove, the first groove, the second groove and the accommodating through hole are sequentially arranged along the length direction, the first groove and the second groove are combined to be in a step shape, and the first limiting part is used for limiting the filling head in the first groove.

In the scheme, the first groove and the second groove are combined to be in a step shape, the first limiting part limits the filling head in the first groove, on one hand, a step surface formed by the first groove and the second groove can play a role in supporting and limiting the filling head, and the stability and reliability of the filling needle mounted on the needle sleeve are improved; in another aspect, the second recess may be adapted to receive a transition section of the filling head.

Preferably, the second limiting part is arranged at the position of the accommodating through hole and the opening groove, the inner wall of the second limiting part and the inner wall of the accommodating through hole form an enclosing area with a narrow opening, the enclosing area is used for accommodating the needle tube, and the minimum width of the narrow opening is smaller than the outer diameter of the needle tube;

And/or the second limiting part is arranged at one end of the needle sleeve body, which is far away from the accommodating groove in the length direction.

In this scheme, the surrounding area is used for holding the needle tubing, and the minimum width of narrow opening is less than the external diameter of needle tubing, with the spacing in the surrounding area of needle tubing, avoids the needle tubing to break away from the needle cover.

In the length direction, the second limiting part is arranged at one end, far away from the accommodating groove, of the needle sleeve body, so that the reliability of mounting the filling needle on the needle sleeve can be improved.

Preferably, the needle sleeve body and the second limiting part are integrally formed.

Preferably, the length of the needle sleeve body is 1/4-4/5 of the length of the filling needle.

In the scheme, the length of the needle sleeve body is set, so that on one hand, the length of the needle sleeve body is obviously smaller than that of the filling needle, the filling needle is conveniently filled into the needle sleeve, and the friction between the needle head and the needle sleeve body is reduced; on the other hand, the needle sleeve body has enough length relative to the filling needle, so that the reliability of the filling needle on the needle sleeve body can be ensured.

The utility model provides a pharmaceutical liquid filling machine, its includes filling subassembly, filling needle frame, one kind of in the above-mentioned scheme is used for installing the needle cover of filling needle, filling subassembly include the filling piece with the filling needle, the filling needle frame is used for installing the needle cover, the filling piece is used for with waiting to pack the thing filling hole of filling needle.

A prefilled needle filling line comprising a transport mechanism for transporting containers to the filling machine for holding a substance to be filled from the filling needle and a filling machine for the above mentioned pharmaceutical.

The utility model has the positive progress effects that:

Through setting up the open slot, the open slot is from the surface intercommunication of needle cover body to holding the through-hole and hold the recess, when installing the filling needle on the needle cover body, can install along radial direction, put into the needle tubing in the holding the through-hole of needle cover body from the open slot department to avoid or reduce the contact and the friction of the syringe needle of filling needle and needle cover body, avoid or reduce production visible foreign matter or biological pollution. The open slot is penetrated at least at one end corresponding to the accommodating groove in the two ends of the length direction, so that the needle tube of the filling needle can enter the accommodating groove from the open slot along the radial direction, and the filling head can be placed into the accommodating groove. The filling needle is limited on the needle sleeve body through the limiting part, so that the filling needle can be prevented from being separated from the needle sleeve body in the production process, the production efficiency of filling is improved, the degerming and filtering time of a product is reduced, and the quality and the production cost of the product are improved.

Drawings

FIG. 1 is a schematic side view of a prior art filling needle;

FIG. 2 is a schematic perspective view of a filling needle according to an embodiment of the present utility model;

FIG. 3 is a schematic front view of a filling needle according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a schematic rear view of a filling needle according to an embodiment of the present utility model;

FIG. 6 is an enlarged view of portion B of FIG. 5;

FIG. 7 is a schematic perspective view of a filling needle and needle hub assembly according to an embodiment of the present utility model;

FIG. 8 is an enlarged view of portion C of FIG. 7;

FIG. 9 is a cross-sectional view of an embodiment of the present utility model of a filling needle and needle hub assembly taken along the plane of symmetry of the filling needle;

FIG. 10 is an enlarged view of portion D of FIG. 9;

fig. 11 is an enlarged view of the portion E in fig. 9.

Reference numerals illustrate:

a filling needle 1;

a filling head 11;

A pagoda segment 111;

a clamping groove section 112, a clamping groove 1121 and an abutting surface 1122;

a transition section 113;

needle tube 12, needle 121;

a filling hole 13;

A needle sheath 2;

A needle sheath body 21;

A receiving groove 211, a first groove 2111, a second groove 2112, a stepped surface 2113;

A receiving through hole 212;

Open slot 213, transition 2131;

A clamping surface 214;

A locking surface 215;

A fixed head 216, a sleeve 217;

A first limiting part 221, an elastic member 2211, and a marble 2212;

the second limiting portion 222 and the bayonet 2221.

Detailed Description

The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.

It should be noted that:

Not specifically described, the length direction L indicates the length direction of the sleeve; after the filling needle is arranged on the needle sleeve, the length direction of the filling needle is consistent with the length direction of the needle sleeve;

The radial direction may be used to describe the direction of a rotating structure or a non-rotating structure; when used to describe the direction of a non-rotating structure, it refers to the direction from the middle of the structure to the outside of the structure; the filling needle in this embodiment, sleeve, holding groove, holding through-hole of needle cover are revolution mechanic.

In order to facilitate understanding of the structure of the filling needle and the needle sheath provided by the utility model, the size of the filling needle and the needle sheath are marked by dotted lines in the drawing, the outline or the approximate boundary between the parts of the filling needle and the needle sheath are shown, and the dotted lines are not used for limiting the shape of the filling needle and the needle sheath; specifically, the approximate boundaries between the pagoda section, the clamping groove section and the transition section in the filling head are shown by dashed lines in fig. 1; the outer contour of the needle cannula is illustrated in phantom in fig. 3-6;

Limiting generally means that the two structures cannot be separated from each other; fixed generally means that the two structures cannot move relative to each other.

The needle sleeve provided by the embodiment is in an axisymmetric structure, and a symmetry plane of the needle sleeve is shown by a dotted line in fig. 3;

In order to facilitate understanding of the structure of the filling needle and the needle sleeve, side view, front view and rear view directions are adopted in the attached drawing description to assist in description, and the direction descriptions are not used for limiting the actual installation directions of the filling needle and the needle sleeve.

The embodiment provides a needle sleeve for installing a filling needle, a pharmaceutical filling machine and a prefilled needle filling line.

The embodiment provides a prefilled needle filling line, including transport mechanism and pharmaceutic liquid filling machine, liquid filling machine includes filling subassembly, filling needle frame, needle cover. The filling assembly mainly comprises a stainless steel filling needle and a pump pipe, wherein the pump pipe is used as a filling piece and used for filling objects to be filled into the filling needle, the filling needle frame is used for installing and fixing a needle sleeve, the needle sleeve is used for installing and fixing the filling needle, the conveying mechanism is used for conveying containers to a filling machine, and the containers are used for containing the objects to be filled from the filling needle. In other embodiments, the filling member may be adapted according to the filling requirement, and may be an automatic, manual or semi-automatic structure capable of realizing filling.

The transport mechanism can be a device with a transport function, such as a production line, a manipulator, a transport trolley and the like; the container can be a bottle, a bag, an injection needle tube and other appliances with a containing function; the object to be loaded can be selected according to specific procedures; the filling needle related to the embodiment is an existing filling needle, and the structure is shown in fig. 1; the structure of the needle sleeve is shown in fig. 2-6; the situation after the filling needle and needle hub are mated in place is shown in fig. 7-11; other structures than the filling needle 1 and the needle sleeve 2 in the filling machine can refer to the prior art; the transport mechanism and other structures of the prefilled needle filling line may be referred to in the art.

As shown in fig. 2 to 6, the needle sheath 2 includes a sheath body 21 and a stopper.

The needle sheath body 21 has an accommodating groove 211 and an accommodating through hole 212 which are sequentially provided in the longitudinal direction thereof, the accommodating groove 211 being for accommodating the filling head 11 of the filling needle 1, and the accommodating through hole 212 being for accommodating the needle tube 12 of the filling needle 1. Specifically, in the present embodiment, the outer diameter d1=2mm of the needle tube 12, and the diameter of the accommodating through hole 212 is 2.1mm.

The needle sheath body 21 also has an open slot 213 extending in the longitudinal direction; in the radial direction, the open groove 213 communicates from the surface of the needle hub body 21 to the accommodation groove 211 and the accommodation through hole 212; of both ends in the length direction, at least the end corresponding to the accommodation groove 211 is penetrated; the open groove 213 is used for the needle tube 12 of the filling needle 1 to enter the accommodating through hole 212 and the accommodating recess 211 from the radial direction.

As shown in fig. 4, in the present embodiment, the outer diameter d1=2 mm of the needle tube 12, and the minimum width x4=2.04 mm of the open groove 213. By providing the open groove 213, the open groove 213 communicates from the surface of the needle housing body 21 to the accommodation through hole 212, the shape of the open groove 213 matches with the shape of the needle tube 12, and the minimum width is larger than the outer diameter of the needle tube 12, when the filling needle 1 is mounted on the needle housing body 21, the needle tube 12 can be mounted in the radial direction, and the needle tube 12 is put into the accommodation through hole 212 and the accommodation groove 211 of the needle housing body 21 from the open groove 213, thereby avoiding or reducing the contact and friction between the needle head 121 of the filling needle 1 and the needle housing body 21, and avoiding or reducing the generation of visible foreign matters or biological contamination. The open groove 213 is perforated at least at one end corresponding to the accommodating recess 211 among both ends in the longitudinal direction, so that the needle tube 12 of the filling needle 1 can enter the accommodating recess 211 from the open groove 213 in the radial direction, thereby allowing the filling head 11 to be placed into the accommodating recess 211.

The spacing portion is used for spacing filling needle 1 on needle cover body 21 for filling needle 1 can not break away from needle cover body 21 voluntarily at the filling in-process, can avoid filling needle 1 relative needle cover body 21 motion in the production process, promotes the production efficiency of filling, thereby reduces the degerming filtration duration of product, is favorable to promoting the quality and the manufacturing cost of product.

As shown in fig. 7 and 9, the needle hub body 21 may be divided into a fixing head 216 and a sleeve 217 which are sequentially disposed in the longitudinal direction from the external view. The needle sheath body 21 is made of 316 stainless steel. As shown in fig. 9, the length z3=175 mm of the filling needle 1, the length z1=95 mm of the needle sleeve body 21, the length z2=80 mm of the sleeve 217, the length Z1 of the needle sleeve body 21 is between 2/5 and 3/5 of the length Z3 of the filling needle 1, on one hand, the length Z1 is obviously smaller than the length of the filling needle 1, so that the filling needle 1 is conveniently arranged in the needle sleeve 2, and the friction between the needle 121 and the needle sleeve body 21 can be reduced; on the other hand, the needle cover body 21 has a sufficient length with respect to the filling needle 1, and the reliability of the mounting of the filling needle 1 on the needle cover body 21 can be ensured. In other embodiments, the length of the needle sleeve body 21 can be flexibly adjusted according to the length of the filling needle 1; when the length of the needle sleeve body 21 is between 1/4 and 4/5 of the length of the filling needle 1, the filling needle 1 can be conveniently arranged on the needle sleeve 2, and better reliability can be maintained; the effect is better when the length of the needle sheath body 21 is between 3/5 and 4/5 of the length of the filling needle 1.

As shown in fig. 2, 7 and 8, the fixing head 216 is a trapezoid polyhedron, and the sleeve 217 is a circle; as shown in fig. 5, the size y=25 mm of the needle cover body 21; as shown in fig. 5 and 7, the diameter d2=10 mm of the sleeve 217. As shown in fig. 2, 3 and 5, the head of the needle sheath body 21 has two symmetrically arranged clamping surfaces 214 and two symmetrically arranged locking surfaces 215, and the filling needle holder of the filling machine clamps the two clamping surfaces 214 of the needle sheath body 21 and locks at the two locking surfaces 215 to fix the needle sheath 2. As shown in fig. 5, the distance x1=16 mm between the two clamping surfaces 214 and the distance x2=12 mm between the two locking surfaces 215. The specific structure of the filling needle holder of this embodiment can be referred to the prior art. In other embodiments, the size and shape of the needle sheath body 21 may be adapted according to the size and shape of the filling needle holder and the filling needle 1.

Optionally, as shown in fig. 2, 3, 5 and 7, the present embodiment includes a first design point: the open grooves 213 penetrate both ends of the needle hub body 21 in the length direction. Further, the convenience of processing the open groove 213 is improved, and the convenience of loading the needle tube 12 into the needle hub body 21 from the radial direction is improved. In other embodiments, of the two ends of the open groove 213, the end remote from the accommodation groove 211 may not penetrate the needle hub body 21 in the length direction.

Optionally, as shown in fig. 2, 3, 5 and 7, the present embodiment includes a second design point: the open slot 213 is a straight slot. The straight groove has a simple structure and is convenient to process, and meanwhile, the convenience of the needle tube 12 entering the accommodating through hole 212 from the opening groove 213 is improved.

In other embodiments, two or either of the design points one, two may be included at the same time. When the design points one and two are included at the same time, the convenience of processing the open groove 213 and the convenience of mounting the filling needle 1 on the needle cover 2 can be further improved.

Optionally, as shown in fig. 2, 4 and 6, the present embodiment includes design points three: the open groove 213 is provided with transition portions 2131 at the bottom in the radial direction, and the two transition portions 2131 form a horn shape opening toward the outer surface of the needle hub body 21. On the one hand, the guide function is realized, so that the needle tube 12 can enter the accommodating through hole 212 from the opening groove 213; on the other hand, the maximum width of the opening slot 213 is set to be large so as to facilitate the loading of the filling needle 1 into the needle sheath 2; as shown in fig. 4 and 5, the maximum width x3=3 mm of the open slot 213, the minimum width x4=2.04 mm, the outer diameter d1=2 mm of the needle tube 12, and the maximum width X3 of the open slot 213 is larger than the outer diameter d1 of the needle tube 12, so that the needle tube 12 can enter the accommodating through hole 212 from the open slot 213. In this embodiment, the transition 2131 is specifically a chamfer; in other embodiments, the shape of the transition 2131 may be flexibly adjusted according to the level of processing technology, the specific requirements of the filling needle 1 and needle hub 2 to be fitted. In other embodiments, the transition 2131 may not be provided.

In other embodiments, the shape of the opening slot 213 may be adaptively adjusted according to the processing technology or the shape of the filling needle 1, so long as the needle tube 12 of the filling needle 1 can enter the accommodating through hole 212 from the opening slot 213 and the assembly of the filling needle 1 and the needle cover 2 can be completed.

Optionally, this embodiment includes design points four: the limiting part is used for fixing the filling needle 1 on the needle sleeve body 21, so that the filling needle 1 cannot move relative to the needle sleeve body 21. By this arrangement, the reliability of mounting the filling needle 1 on the needle sheath 2 can be further improved. In other embodiments, according to the change of the working requirement of the filling machine, if the filling needle 1 does not need to move along with the needle sleeve 2, the filling needle 1 may not be fixed on the needle sleeve body 21, so long as the filling needle 1 is limited not to be separated from the needle sleeve 2, for example, a fit gap is formed between the filling needle 1 and the needle sleeve 2, and the filling needle 1 may slightly shake in the needle sleeve 2.

In other embodiments, two or any of the design points three, four may be included at the same time.

Alternatively, as shown in fig. 10, the present embodiment includes the design gist five: the limiting portion comprises a first limiting portion 221, and the first limiting portion 221 is used for limiting the filling head 11 of the filling needle 1 in the accommodating groove 211. Because the radial dimension of the filling head 11 of the filling needle 1 is larger than that of the needle tube 12, the filling head 11 is limited in the accommodating groove 211 through the first limiting part 221, so that the needle sleeve 2 is convenient to process, and the limiting operation of the filling head 11 is convenient; the filling head 11 is located the one end of length direction, and is spacing in holding groove 211 with filling head 11 through first spacing portion 221, can make filling needle 1 length direction's one end spacing reliable, improves filling needle 1 and installs the reliability on needle cover 2.

Alternatively, as shown in fig. 10, the present embodiment includes the design gist six: the limiting portion includes a second limiting portion 222, and the second limiting portion 222 is used for limiting the needle tube 12 in the accommodating through hole 212. The stability of the filling needle 1 mounted on the needle cover 2 can be improved by setting the position of the second limiting portion 222. Specifically, as shown in fig. 9 and 11, the second limiting portion 222 is located at about 1/3 of the position of the filling needle 1 in the length direction, so that the reliability of the filling needle 1 mounted on the needle sleeve 2 can be well maintained, and the shaking of the filling needle 1 is avoided.

Specifically, as shown in fig. 2 and 10, the side wall of the accommodating groove 211 is provided with a mounting hole, the first limiting portion 221 includes a marble 2212 and an elastic member 2211, one end of the elastic member 2211 in the extending direction and the needle sleeve body 21 are fixedly connected to the mounting hole, the other end is fixedly connected to the marble 2212, and the marble 2212 is used for extending into the clamping groove 1121 of the filling head 11. The filling head 11 is limited in the accommodating groove 211 by the marble 2212 and the elastic piece 2211, and the device has the advantages of simple structure, reliable limitation and convenient assembly and disassembly. The marble 2212 and the elastic piece 2211 have a self-locking function, through the arrangement of the elastic coefficient of the elastic piece 2211 and the arrangement of the sizes of the elastic piece 2211, the marble 2212 and the clamping groove 1121, when the marble 2212 is clamped into the clamping groove 1121, the clamping groove 1121 is abutted in the radial direction, the filling needle 1 can be fixed on the needle sleeve 2, when continuous execution operation is carried out, the filling needle 1 is always in a fixed state in the needle sleeve 2 and does not generate displacement, and when the filling needle 1 runs along with the needle sleeve 2 in the production process, the filling needle 1 can be prevented from being contacted with other structures, and further the stability of the process and the quality of products are improved. In this embodiment, the material of the marble 2212 is stainless steel.

When the filling needle 1 is placed into the needle sleeve 2, the filling head 11 is placed into the accommodating groove 211 and then is contacted with the marble 2212, so that the elastic piece 2211 is compressed, the marble 2212 is driven to move towards the direction of the mounting hole, and when the filling needle 1 moves to the clamping groove 1121 of the marble 2212 opposite to the filling needle 1 along the length direction, the elastic piece 2211 resets to drive the marble 2212 to move towards the direction away from the mounting hole so as to be clamped in the clamping groove 1121 of the filling head 11, and the filling head 11 is abutted against in the radial direction, so that the filling head 11 is fixed in the accommodating groove 211.

When the filling needle 1 is removed from the needle sleeve 2, the filling head 11 is far away from the accommodating groove 211 under the action of external force, the marble 2212 is driven to move towards the direction of the mounting hole until the clamping groove 1121 of the filling head 11 is separated from the marble 2212, and then the filling needle 1 can be removed from the needle sleeve 2.

Alternatively, as shown in fig. 2 and 10, the accommodating groove 211 includes a first groove 2111 and a second groove 2112, the first groove 2111, the second groove 2112, and the accommodating through hole 212 are sequentially disposed along the length direction, the first groove 2111 and the second groove 2112 are combined to be in a step shape, and the first limiting portion 221 is used for limiting the filling head 11 in the first groove 2111. Specifically, the mounting holes are provided on the side walls of the first groove 2111. The first limiting part 221 limits the filling head 11 in the first groove 2111, on one hand, the step surface 2113 formed by the first groove 2111 and the second groove 2112 can play a role in supporting and limiting the filling head 11, so that the stability and reliability of the filling needle 1 mounted on the needle sleeve 2 are improved, specifically, as shown in fig. 2 and 10, the end face, close to the transition section 113, of the clamping groove 1121 section 112 of the filling needle 1 is an abutting surface 1122, and after the filling needle 1 is mounted on the needle sleeve 2, the abutting surface 1122 of the filling needle 1 abuts against the step surface 2113 of the accommodating groove 211; on the other hand, a second groove 2112 may be used to accommodate the transition 113 of the filling head 11. In other embodiments, the shape of the accommodating recess 211 may be different from the present embodiment, and the shape of the accommodating recess 211 may be adaptively adjusted according to the specific structure of the first limiting part 221 and the filling head 11.

Alternatively, as shown in fig. 11, the present embodiment includes a design point of seventh: in the length direction, the second limiting portion 222 is provided at the end of the needle sheath body 21 away from the accommodating groove 211, so that the reliability of mounting the filling needle 1 on the needle sheath 2 can be improved. In other embodiments, the position of the second limiting portion 222 may be adjusted according to the length of the needle sleeve body 21 and the length of the filling needle 1, so that the filling needle 1 can be limited on the needle sleeve 2.

Specifically, as shown in fig. 4, 6 and 11, the present embodiment includes a design point eight: the second limiting part 222 is arranged at the joint of the accommodating through hole 212 and the opening groove 213, the second limiting part 222 specifically comprises two bayonets 2221, the inner walls of the two bayonets 2221 and the inner wall of the accommodating through hole 212 form an encircling area with a narrow opening, the cross section of the encircling area is larger than that of the needle tube 12, and the needle tube 12 can be accommodated; as shown in fig. 4, the minimum width x5=1.96 mm of the narrow opening, which is smaller than the outer diameter d1=2 mm of the needle tube 12, limits the needle tube 12 in the surrounding area, and prevents the needle tube 12 from being separated from the needle sleeve 2.

The second limiting portion 222 may be processed by adding ceramic spring marbles by a local processing snap-in process, and the prior art may be referred to specifically. As shown in fig. 11, the accommodating through hole 212 and the opening slot 213 may be machined first, after machining, the outline of the needle hub body 21 is shown by a dotted line, the position of the dotted line corresponds to the position of the second limiting portion 222, then a force F is applied to the corresponding position of the second limiting portion 222, so that the opening slot 213 and the accommodating through hole 212 are locally deformed to form a bayonet 2221, and two bayonets 2221 are machined to obtain the second limiting portion 222 in the embodiment; the second limiting part 222 is machined by the method, the machining is simple, the second limiting part 222 and the needle sleeve body 21 can be integrally formed, the structural rigidity is good, real-time measurement in the process of machining the second limiting part 222 is facilitated, the size of the external force F is flexibly adjusted, and the size of the second limiting part 222 meets the requirement. In other embodiments, the second limiting portion 222 may also be integrally formed with the needle hub body 21 by an integral forming process such as machining to remove material, casting, 3D printing, etc.

In other embodiments, two or any of design points seven, eight may be included simultaneously.

In other embodiments, the first limiting portion 221 may be a structure that may perform a limiting function, such as a ball 2212 and an elastic member 2211, a screw, a limiting pin, or a clamping structure. In other embodiments, the second limiting portion 222 may be a clamping structure, a structure with an opening, or a ring structure with a limiting effect; for example, the second limiting portion 222 may be an opening structure provided on the needle hub body 21, and the opening is smaller than the outer diameter of the needle tube 12, so as to limit the needle tube 12 from being separated from the needle hub body 21; for example, the second limiting portion 222 may be an annular structure disposed on the needle sleeve body 21, where an inner diameter of the annular structure is larger than an outer diameter of the needle tube 12, allowing the needle tube 12 to pass through, and the annular structure may radially limit the needle tube 12 to prevent the needle tube 12 from being separated from the needle sleeve 2 in a radial direction; for example, the second limiting portion 222 may be a clamping structure that is provided on the needle hub body 21 and can be opened and closed. In other embodiments, the needle tube 12 of the filling needle 1 can be fixed on the needle sleeve body through the first limit part 221 or the second limit part 222, so that the filling needle 1 is fixed on the needle sleeve body 21; the filling head 11 of the filling needle 1 is thicker than the needle tube 12, and the filling needle 1 is fixed on the needle sleeve body 21 by the filling head 11, so that the process is easier to realize. When the filling needle 1 is fixed by the second limiting portion 222, for example, the second limiting portion 222 is a clamping structure fixed on the needle sleeve body 21, and the needle tube 12 is clamped by the clamping structure to fix the filling needle 1 on the needle sleeve body 21.

In other embodiments, two or any of the design points five, six may be included at the same time. When the design points five and six are included simultaneously, namely, the limiting part comprises the first limiting part 221 and the second limiting part 222, the filling head 11 and the needle tube 12 are both limited, so that a plurality of positions of the filling needle 1 in the length direction are limited on the needle sleeve 2, and the reliability of the filling needle 1 mounted on the needle sleeve 2 can be further improved.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.

Claims (11)

1. A needle hub for mounting a filling needle, comprising:

The needle sleeve comprises a needle sleeve body, a needle tube and a needle tube, wherein the needle sleeve body is provided with an accommodating groove and an accommodating through hole which are sequentially arranged along the length direction of the needle sleeve body, and is also provided with an opening groove which is arranged along the length direction in an extending manner, the opening groove is communicated with the accommodating groove and the accommodating through hole from the surface of the needle sleeve body in the radial direction, at least one end, corresponding to the accommodating groove, of the two ends of the opening groove in the length direction is penetrated, and the opening groove is used for a needle tube of a filling needle to enter the accommodating through hole and the accommodating groove from the radial direction;

And the limiting part is used for limiting the filling needle on the needle sleeve body.

2. A needle hub for mounting a filling needle as defined in claim 1, wherein said open slot extends through both ends of said needle hub body in said length direction;

And/or the open slot is a straight slot extending along the length direction.

3. A needle hub for mounting a filling needle as defined in claim 1, wherein the bottom of said open slot in said radial direction is flared toward the outer surface of said needle hub body;

And/or the limiting part is used for fixing the filling needle on the needle sleeve body.

4. A needle hub for mounting a filling needle as defined in claim 1, wherein said limiter comprises:

the first limiting part is used for limiting the filling head of the filling needle in the accommodating groove;

and/or the second limiting part is used for limiting the needle tube in the accommodating through hole.

5. The needle cover for installing a filling needle according to claim 4, wherein the side wall of the accommodating groove is provided with an installing hole, the first limiting part comprises a marble and an elastic piece, one end of the elastic piece in the extending direction and the needle cover body are fixedly connected to the installing hole, the other end of the elastic piece is fixedly connected with the marble, and the marble is used for extending into a clamping groove of the filling head;

Or, the first limiting part is used for fixing the filling head of the filling needle in the accommodating groove.

6. The needle hub for mounting a filling needle as defined in claim 4, wherein the accommodating groove comprises a first groove and a second groove, the first groove, the second groove and the accommodating through hole are sequentially arranged along the length direction, the combination of the first groove and the second groove is in a stepped shape, and the first limiting part is used for limiting the filling head in the first groove.

7. A needle hub for mounting a filling needle as defined in claim 4, wherein said second limiting portion is disposed at said receiving through hole and said open slot, an inner wall of said second limiting portion and an inner wall of said receiving through hole forming an enclosed area having a narrow opening for receiving said needle cannula, said narrow opening having a minimum width smaller than an outer diameter of said needle cannula;

And/or the second limiting part is arranged at one end of the needle sleeve body, which is far away from the accommodating groove in the length direction.

8. A needle hub for mounting a filling needle as defined in claim 7, wherein said hub body and said second limiter portion are integrally formed.

9. A needle hub for mounting a filling needle as defined in claim 1, wherein the length of the needle hub body is 1/4-4/5 of the length of the filling needle.

10. Pharmaceutical filling machine, characterized in that it comprises a filling assembly comprising a filling member and a filling needle, a filling needle holder for mounting the needle, the filling member being adapted to fill the filling hole of the filling needle with the substance to be filled, a needle sleeve for mounting the filling needle according to any one of claims 1-9.

11. A prefilled needle filling line comprising a transport mechanism for transporting containers to the filling machine for holding a substance to be filled from the filling needle and a pharmaceutical filling machine according to claim 10.