CN114209928B

CN114209928B - Insulin syringe convenient to change syringe needle

Info

Publication number: CN114209928B
Application number: CN202111531931.0A
Authority: CN
Inventors: 朱平南; 鲍亚丽; 吴晓丽; 陈小梅; 王烨
Original assignee: Jiangsu Jichun Medical Devices Co ltd
Current assignee: Jiangsu Jichun Medical Devices Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2023-06-30
Anticipated expiration: 2041-12-15
Also published as: CN114209928A

Abstract

The invention discloses an insulin syringe with a needle convenient to replace, and relates to the technical field of medical injection tools; the pen rack sleeve is fixed on the right side of the pen rack, a slot is formed in the right side of the pen rack sleeve, the pen rack sleeve is arranged in a sleeve slot formed in the inner annular wall of the left side of the pen body, the pen rack sleeve and the sleeve slot are arranged in a screwed connection manner through threads, and a threaded push rod penetrates through the slot; the two brackets are arranged at the upper side and the lower side of the inside of the slot in an up-down opposite way, the brackets are arranged at the right side of the pen rack sleeve, and a rotating slot is formed in the vertical end of each bracket; the clamping pieces are respectively penetrated in the corresponding rotating grooves, the clamping pieces are hinged with the rotating grooves through the hinge shafts, and the left sides of the clamping pieces are penetrated in the grooves; the two clamping pieces are arranged up and down oppositely; the clamping tables are respectively fixed on the left sides of the corresponding clamping pieces and are abutted against the inner wall of the right side of the pen rack sleeve; can make and install and dismantle fast between refill frame and the pen body, avoid manual operation and the smooth silk phenomenon that leads to, improve operating efficiency.

Description

Insulin syringe convenient to change syringe needle

Technical Field

The invention relates to the technical field of medical injection tools, in particular to an insulin syringe with a needle convenient to replace.

Background

Insulin is of a large variety and is provided with a special matched insulin syringe; insulin syringes in the market mainly include common insulin syringes, insulin injection pens and needleless insulin syringes; the insulin injection pen is divided into an insulin prefilled injection pen and an insulin injection pen with a replaceable pen core; the insulin prefilled injection pen is a disposable product, and can be discarded together with the pen after being used up; the pen body of the insulin injection pen with the replaceable pen core can be repeatedly used, but the pen core and the needle head are used up and need to be replaced by new pen cores and needle heads;

however, at present, the replacement operation of the pen core can be performed by unscrewing the pen core frame, and the pen core frame is screwed with the pen body through threads after the replacement of the pen core; the pen refill holder and the pen body cannot be screwed due to the fact that hands of a patient slide, and the pen refill holder and the pen body shake in the using process, so that the using effect is affected.

Disclosure of Invention

Aiming at the defects and shortcomings of the prior art, the invention provides the insulin syringe which has the advantages of simple structure, reasonable design and convenient use and is convenient for replacing the needle head, the refill holder and the pen body can be quickly assembled and disassembled, the phenomenon of slipping caused by manual operation is avoided, and the operation efficiency is improved.

In order to achieve the above purpose, the invention adopts the following technical scheme: the pen comprises a pen body, a pen core frame, a pen core, a pen cap and a pen needle, wherein a push key is arranged on the right side of the pen body, a threaded push rod is arranged in the pen body, the right end of the threaded push rod is connected with the push key, a piston is arranged at the left end of the threaded push rod, the pen core frame is arranged on the left side of the pen body, the pen core is arranged in the pen core frame, the pen cap is arranged on the left side of the pen core, the pen cap is exposed on the left side of the pen core frame, a pen needle is arranged on the pen cap, and the pen cap is sleeved on the pen core frame;

it also comprises:

the pen comprises a pen rack sleeve, wherein the pen rack sleeve is fixed on the right side of a pen core rack, a slot is formed in the right side of the pen rack sleeve, the slot is in a circular structure, the diameter of the inner annular wall of the pen rack sleeve is larger than that of the inner annular wall of the pen core rack, and the diameter of the outer annular wall of the pen rack sleeve is smaller than that of the outer annular wall of the pen core rack; the pen rack sleeve is arranged in a sleeve groove formed in the inner annular wall at the left side of the pen body, the pen rack sleeve and the sleeve groove are arranged in a screwed connection manner through threads, and the threaded push rod penetrates through the groove;

the two brackets are arranged in an L-shaped structure, the two brackets are arranged at the upper side and the lower side of the inside of the slot in an up-down opposite way, the brackets are arranged at the right side of the pen rack sleeve, and a rotating slot is formed in the vertical end of each bracket;

the two clamping pieces are respectively penetrated in the corresponding rotating grooves, the clamping pieces and the rotating grooves are hinged through the hinge shafts, and the left sides of the clamping pieces are penetrated in the grooves; the two clamping pieces are arranged up and down oppositely;

the two clamping tables are respectively fixed on the left sides of the corresponding clamping pieces and are arranged on the right inner wall of the pen rack sleeve in a propping manner;

the clamping jaw mechanisms are arranged at the inner sides of the horizontal ends of the corresponding brackets respectively; the clamping jaw mechanism is connected with the clamping piece;

the two adjusting card mechanisms are respectively arranged between the bracket and the slot.

Preferably, the jaw mechanism comprises:

the support block is fixed on the right inner wall of the vertical end in the bracket;

the first connecting piece is arranged in the supporting block in a penetrating mode;

the second connecting piece is hinged to the left side of the first connecting piece through a hinge shaft, and the second connecting piece is arranged on the front side of the first connecting piece; the left side of the second connecting piece is hinged with the right side of the clamping piece through a hinge shaft, and the second connecting piece is arranged on the rear side of the clamping piece;

the driving table is fixed on the outer side of the left side of the first connecting piece and is in contact with the inner wall of the horizontal end in the bracket;

the driving motor is fixed on the inner wall of the vertical end in the bracket and is respectively connected with a battery inside the pen body and a control switch on the pen body;

the driving screw rod is fixed on an output shaft of the driving motor, the right end of the driving screw rod is connected with the supporting block in a rotating way through a bearing, and the driving screw rod is arranged in the driving table in a threaded rotating way;

the control switch drives the driving motor to start, so that the driving screw rod rotates, and the driving table moves, when the driving table moves to the right side, the first connecting piece is driven to move to the right in the supporting block, the first connecting piece pulls the second connecting piece, and accordingly the clamping piece rotates inwards around a rotating joint between the clamping piece and the rotating groove, the clamping table moves to the side close to the threaded push rod, and therefore the pen rack sleeve is installed or detached; on the contrary, after the pen rack sleeve is arranged in the pen body, the driving motor drives the driving platform to move leftwards, so that the first connecting piece is pulled to move leftwards, the clamping piece is enabled to move around the rotating joint between the second connecting piece and the rotating groove to one side close to the inner annular wall of the pen rack sleeve, the clamping operation is carried out on the right inner wall of the pen rack sleeve by the clamping platform, and the installation between the pen rack sleeve and the pen body is more compact and stable.

Preferably, the front side and the rear side of the first connecting piece are both fixedly provided with sliding rails, and the sliding rails are arranged in the supporting blocks in a left-right sliding manner; the slide rail carries out sliding guide to the first connecting piece.

Preferably, the adjusting card mechanism comprises:

the electric telescopic rod is fixed on the inner annular wall of the slot, the pushing end of the electric telescopic rod is fixedly connected with the horizontal end in the bracket, and the electric telescopic rod is respectively connected with the battery inside the pen body and the control switch on the pen body;

the two connecting frames are symmetrically arranged at the left side and the right side of the horizontal end in the bracket;

the two inserting blocks are respectively fixed on the outer sides of the corresponding connecting frames;

the two guide frames are respectively arranged at the left side and the right side of the electric telescopic rod, the guide frames are fixed on the inner annular wall of the slot, and the insertion block is inserted into the corresponding guide frames;

the control switch drives the electric telescopic rod to start, so that the support moves, the clamping piece moves, the pen rack sleeve is more convenient to operate, the support drives the connecting frame to move when moving, and the support guides through sliding fit of the guide frame and the inserting block.

Preferably, the left and right sides of the guide frame are provided with guide grooves, guide tables are symmetrically fixed on one end of the insertion block in the guide frame, and the guide tables are arranged in the guide grooves in a vertical sliding manner; the guide table enables the movement of the plug block to be more stable.

Preferably, connecting blocks are fixed on the vertical ends of the left side and the right side of the connecting frame, and the connecting blocks are connected with the horizontal ends of the bracket.

The working principle of the invention is as follows: when the refill and the pen needle need to be replaced, the following three steps are needed;

step one: rotating the pen refill holder to separate from the pen body; the clamping piece rotates around the hinged rotary joint between the clamping piece and the rotating groove through the clamping jaw mechanism, so that the clamping table moves to one side close to the threaded push rod, and the clamping table is far away from the pen rack sleeve, so that the pen rack is convenient to rotate, and the pen rack sleeve is far away from the pen body;

step two: taking out the pen core from the right side of the pen core frame, replacing the pen core with a new pen core, exposing a needle cap at the left side of the new pen core to the left side of the pen core frame, rotatably mounting a pen frame sleeve at the right side of the pen core frame in the pen body, and penetrating a clamping piece and a clamping table in a slot in the pen frame sleeve at the moment; then the needle cap is disinfected and a new pen needle is installed;

step three: the upper part and the lower part in the pen body are rotated, so that the clamping table clamps the inner wall of the right side of the pen rack sleeve; the clamping piece rotates around the rotary joint between the clamping piece and the rotary groove through the clamping jaw mechanism, so that the clamping table moves to one side far away from the threaded push rod, clamping operation is performed on the pen rack sleeve, and the pen core rack and the pen body are stably installed.

After the structure is adopted, the invention has the beneficial effects that:

1. the pen core frame and the pen body are installed through the pen frame sleeve, so that the pen core frame can be conveniently installed and disassembled;

2. the pen rack sleeve is clamped through the clamping piece and the clamping table, so that the pen rack sleeve is more firmly arranged in the pen body;

3. the clamping piece and the clamping table synchronously move towards the threaded push rod, so that the clamping piece and the clamping table are far away from the pen rack sleeve, and the pen core rack is convenient to operate.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic view of the connection structure among the connecting frame, the insert block and the guide frame in the present invention.

Fig. 4 is a schematic diagram of a connection structure of the clamping member driving the clamping platform to be far away from the pen rack sleeve in the invention.

Fig. 5 is a schematic structural view of the pen holder cap according to the present invention.

Reference numerals illustrate:

the pen comprises a pen body 1, a sleeve groove 1-1, a pen core frame 2, a pen core 3, a pen cap 4, a pen needle 5, a push key 6, a threaded push rod 7, a piston 8, a pen frame sleeve 9, a slot 9-1, a bracket 10, a rotating groove 10-1, a clamping piece 11, a clamping table 12, a clamping jaw mechanism 13, a supporting block 13-1, a first connecting piece 13-2, a second connecting piece 13-3, a driving table 13-4, a driving motor 13-5, a driving screw rod 13-6, a sliding rail 13-7, an adjusting clamping mechanism 14, an electric telescopic rod 14-1, a connecting frame 14-2, an inserting block 14-3, a guide frame 14-4, a guide groove 14-4-1, a guide table 14-5 and a connecting block 14-6.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1 to 5, the technical scheme adopted in the specific embodiment is as follows: the pen comprises a pen body 1, a pen core frame 2, a pen core 3, a pen cap 4 and a pen needle 5, wherein a push key 6 is arranged on the right side of the pen body 1, a threaded push rod 7 is arranged in the pen body 1, the right end of the threaded push rod 7 is connected with the push key 6, a piston 8 is arranged at the left end of the threaded push rod 7, the pen core frame 2 is arranged on the left side of the pen body 1, the pen core 3 is arranged in the pen core frame 2, the needle cap is arranged on the left side of the pen core 3 and exposed on the left side of the pen core frame 2, a pen needle 5 is arranged on the needle cap, and the pen cap 4 is sleeved on the pen core frame 2;

it also comprises:

the pen rack cover 9 is fixed on the right side of the pen rack 2 by using an adhesive, a slot 9-1 is formed in the right side of the pen rack cover 9, the slot 9-1 is in a circular structure, the diameter of the inner annular wall of the pen rack cover 9 is larger than that of the inner annular wall of the pen rack 2, and the diameter of the outer annular wall of the pen rack cover 9 is smaller than that of the outer annular wall of the pen rack 2; the pen rack sleeve 9 is arranged in a sleeve groove 1-1 formed in the inner annular wall of the left side of the pen body 1, the pen rack sleeve 9 and the sleeve groove 1-1 are arranged in a screwed mode, and the threaded push rod 7 penetrates through the groove 9-1;

the two brackets 10 are arranged, the brackets 10 are of an L-shaped structure, the two brackets 10 are arranged at the upper side and the lower side of the inside of the slot 9-1 in an up-down opposite way, the brackets 10 are arranged at the right side of the pen rack sleeve 9, and a rotating slot 10-1 is arranged in the vertical end of the bracket 10;

the two clamping pieces 11 are respectively penetrated in the corresponding rotating grooves 10-1, the clamping pieces 11 are hinged with the rotating grooves 10-1 through hinge shafts, and the left sides of the clamping pieces 11 are penetrated in the grooves 9-1; the two clamping pieces 11 are arranged up and down oppositely;

the two clamping tables 12 are respectively fixed on the left side of the corresponding clamping piece 11 by using screws, and the clamping tables 12 are arranged on the right inner wall of the pen rack sleeve 9 in a propping manner;

the clamping jaw mechanisms 13 are arranged at the inner sides of the horizontal ends of the corresponding brackets 10 respectively, and the two clamping jaw mechanisms 13 are arranged at the outer sides of the horizontal ends of the brackets; the clamping jaw mechanism 13 is connected with the clamping piece 11;

the two adjusting card mechanisms 14 are respectively arranged between the bracket 10 and the slot 9-1.

Preferably, the jaw mechanism 13 further comprises:

the support block 13-1, wherein the support block 13-1 is fixed on the right inner wall of the vertical end in the bracket 10 by using screws;

the first connecting piece 13-2 is arranged in the supporting block 13-1 in a penetrating way;

the second connecting piece 13-3 is hinged to the left side of the first connecting piece 13-2 through a hinge shaft, and the second connecting piece 13-3 is arranged on the front side of the first connecting piece 13-2; the left side of the second connecting piece 13-3 is hinged with the right side of the clamping piece 11 through a hinge shaft, and the second connecting piece 13-3 is arranged at the rear side of the clamping piece 11;

the driving table 13-4, wherein the driving table 13-4 is fixed on the outer side of the left side of the first connecting piece 13-2 by using screws, and the driving table 13-4 is in contact with the inner wall of the horizontal end in the bracket 10;

the driving motor 13-5, the driving motor 13-5 is fixed on the inner wall of the vertical end in the bracket 10 by utilizing screws, and the driving motor 13-5 is respectively connected with a battery inside the pen body 1 and a control switch on the pen body 1 through leads; the specific use model of the driving motor 13-5 is directly purchased, installed and used from the market according to the actual use requirement;

the driving screw rod 13-6, wherein the driving screw rod 13-6 is fixed on an output shaft of the driving motor 13-5 by utilizing a screw, the right end of the driving screw rod 13-6 is in screwed connection with the supporting block 13-1 through a bearing, and the driving screw rod 13-6 is rotatably arranged in the driving table 13-4 through threads;

the control switch drives the driving motor 13-5 to start, so that the driving screw rod 13-6 rotates, the driving table 13-4 moves, when the driving table 13-4 moves to the right, the first connecting piece 13-2 is driven to move to the right in the supporting block 13-1, the first connecting piece 13-2 pulls the second connecting piece 13-3, the clamping piece 11 rotates inwards around a rotating joint between the clamping piece 11 and the rotating groove 10-1, and the clamping table 12 moves to the side close to the threaded push rod 7, so that the pen rack sleeve 9 is installed or detached; on the contrary, when the pen rack cover 9 is installed in the pen body 1, the driving motor 13-5 drives the driving platform 13-4 to move leftwards, so that the first connecting piece 13-2 is pulled to move leftwards, the clamping piece 11 moves to one side close to the inner annular wall of the pen rack cover 9 around the rotating joint between the second connecting piece 13-3 and the rotating groove 10-1, the clamping platform 12 clamps the right inner wall of the pen rack cover 9, and the installation between the pen rack cover 9 and the pen body 1 is more compact and stable.

As an preferable scheme, the front side and the rear side of the first connecting piece 13-2 are both fixed with a sliding rail 13-7 by utilizing screws, and the sliding rail 13-7 is arranged in the supporting block 13-1 in a left-right sliding manner; the slide rail 13-7 slidably guides the first connecting member 13-2.

Preferably, the adjusting card mechanism 14 further comprises:

the electric telescopic rod 14-1, wherein the electric telescopic rod 14-1 is fixed on the inner annular wall of the slot 9-1 by using a screw, the pushing end of the electric telescopic rod 14-1 is fixedly connected with the horizontal end in the bracket 10 by using a screw, and the electric telescopic rod 14-1 is respectively connected with a battery inside the pen body 1 and a control switch on the pen body 1 by using a lead wire; the specific use type of the electric telescopic rod 14-1 is directly purchased, installed and used from the market according to the actual use requirement;

the two connecting frames 14-2 are symmetrically arranged at the left side and the right side of the horizontal end in the bracket 10;

the two inserting blocks 14-3 are respectively fixed on the outer sides of the corresponding connecting frames 14-2 by screws;

the guide frames 14-4 are respectively arranged at the left side and the right side of the electric telescopic rod 14-1, the guide frames 14-4 are fixed on the inner annular wall of the slot 9-1 by utilizing screws, and the insertion blocks 14-3 are inserted into the corresponding guide frames 14-4;

the control switch drives the electric telescopic rod 14-1 to start, so that the support 10 moves, the clamping piece 11 moves, the pen rack sleeve 9 is more convenient to operate, the support 10 drives the connecting rack 14-2 to move when moving, and the support is guided through the sliding fit of the guide rack 14-4 and the inserting block 14-3.

As a preferred scheme, the guide frames 14-4 are provided with guide grooves 14-4-1 on the left and right sides, the insertion block 14-3 is positioned at one end of the guide frames 14-4 and is provided with guide platforms 14-5 symmetrically and horizontally, and the guide platforms 14-5 are arranged in the guide grooves 14-4-1 in a sliding manner up and down; the guide table 14-5 stabilizes the movement of the insert block 14-3.

Preferably, the vertical ends of the left and right sides of the connecting frame 14-2 are fixed with the connecting blocks 14-6 by screws, and the connecting blocks 14-6 are connected with the horizontal ends of the bracket 10 by screws.

The working principle of the specific embodiment is as follows: when the refill 3 and the pen needle 5 need to be replaced, the following three steps are needed;

step one: rotating the pen refill holder 2 to be separated from the pen body 1; the clamping piece 11 rotates around a hinged rotating point between the clamping piece 11 and the rotating groove 10-1 through the clamping jaw mechanism 13, so that the clamping table 12 moves to one side close to the threaded push rod 7, the clamping table 12 is far away from the pen rack cover 9, the pen rack 2 is convenient to rotate, and the pen rack cover 9 is far away from the pen body 1; the control switch drives the driving motor 13-5 to start, so that the driving screw rod 13-6 rotates, the driving table 13-4 moves, when the driving table 13-4 moves to the right, the first connecting piece 13-2 is driven to move to the right in the supporting block 13-1, the first connecting piece 13-2 pulls the second connecting piece 13-3, the clamping piece 11 rotates inwards around a rotating joint between the clamping piece 11 and the rotating groove 10-1, and the clamping table 12 moves to one side close to the threaded push rod 7, so that the pen rack sleeve 9 is replaced;

step two: taking out the pen core 3 from the right side of the pen core frame 2, replacing the pen core 3 with a new pen core 3, exposing a needle cap at the left side of the new pen core 3 to the left side of the pen core frame 2, rotatably mounting a pen frame sleeve 9 at the right side of the pen core frame 2 in the pen body 1, and penetrating a clamping piece 11 and a clamping table 12 in a slot 9-1 in the pen frame sleeve 9 at the moment; then the needle cap is disinfected, and a new pen needle 5 is installed;

step three: the upper part and the lower part in the pen body 1 are rotated, so that the clamping table 12 clamps the inner wall of the right side of the pen rack cover 9; the clamping piece 11 rotates around a rotating joint between the clamping piece and the rotating groove 10-1 through the clamping jaw mechanism 13, so that the clamping table 12 moves to one side far away from the threaded push rod 7, the pen holder sleeve 9 is clamped, and the pen refill holder 2 and the pen body 1 are stably installed; the control switch drives the driving motor 13-5 to start, so that the driving screw rod 13-6 rotates, the driving table 13-4 moves, when the driving table 13-4 moves leftwards, the first connecting piece 13-2 is pulled to move leftwards, the clamping piece 11 moves to one side close to the inner annular wall of the pen rack cover 9 around a rotating joint between the clamping piece 11 and the rotating groove 10-1 through the second connecting piece 13-3, and the clamping table 12 clamps the right inner wall of the pen rack cover 9.

After adopting above-mentioned structure, this concrete implementation mode beneficial effect does:

1. the pen refill holder 2 and the pen body 1 are mounted through the pen holder sleeve 9, so that the pen refill holder 2 can be mounted and dismounted conveniently;

2. the pen rack cover 9 is clamped through the clamping piece 11 and the clamping table 12, so that the pen rack cover 9 is more stable in the pen body 1;

3. the clamping piece 11 and the clamping table 12 synchronously move towards the threaded push rod 7, so that the clamping piece 11 and the clamping table 12 are far away from the pen rack sleeve 9, and the pen refill rack 2 is convenient to operate;

4. the driving platform 13-4 is driven, so that the first connecting piece 13-2 is driven, the second connecting piece 13-3 is used for operating the clamping piece 11, and the angle of the clamping piece 11 is changed;

5. the bracket 10 is pushed by the electric telescopic rod 14-1, so that the position of the clamping piece 11 is adjusted, and the clamping piece 11 is more convenient to operate.

The foregoing is merely illustrative of the present invention and not restrictive, and other modifications and equivalents thereof may occur to those skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. An insulin syringe convenient for replacing a needle head comprises a pen body (1), a pen core frame (2), a pen core (3), a pen cap (4) and a pen needle (5), wherein a push key (6) is arranged on the right side of the pen body (1), a threaded push rod (7) is arranged in the pen body (1), the right end of the threaded push rod (7) is connected with the push key (6), a piston (8) is arranged at the left end of the threaded push rod (7), the pen core frame (2) is arranged on the left side of the pen body (1), the pen core (3) is arranged in the pen core frame (2), the needle cap is exposed on the left side of the pen core frame (2), the pen needle (5) is arranged on the needle cap, and the pen cap (4) is sleeved on the pen core frame (2);

characterized in that it further comprises:

the pen comprises a pen rack sleeve (9), wherein the pen rack sleeve (9) is fixed on the right side of a pen rack (2), a slot (9-1) is formed in the right side of the pen rack sleeve (9), the slot (9-1) is in a circular structure, the diameter of the inner annular wall of the pen rack sleeve (9) is larger than that of the inner annular wall of the pen rack (2), and the diameter of the outer annular wall of the pen rack sleeve (9) is smaller than that of the outer annular wall of the pen rack (2); the pen rack sleeve (9) is arranged in a sleeve groove (1-1) formed in the inner annular wall of the left side of the pen body (1), the pen rack sleeve (9) and the sleeve groove (1-1) are arranged in a screwed connection mode through threads, and the threaded push rod (7) is arranged in the groove (9-1) in a penetrating mode;

the pen rack comprises two brackets (10), wherein the two brackets (10) are in an L-shaped structure, the two brackets (10) are arranged on the upper side and the lower side of the inside of the slot (9-1) in an up-down opposite mode, the brackets (10) are arranged on the right side of the pen rack sleeve (9), and a rotating slot (10-1) is formed in the vertical end of each bracket (10);

the two clamping pieces (11) are respectively penetrated in the corresponding rotating grooves (10-1), the clamping pieces (11) are hinged with the rotating grooves (10-1) through hinge shafts, and the left side of the clamping pieces (11) is penetrated in the grooves (9-1); the two clamping pieces (11) are arranged up and down oppositely;

the two clamping tables (12) are respectively fixed on the left sides of the corresponding clamping pieces (11), and the clamping tables (12) are arranged on the right inner wall of the pen rack sleeve (9) in a propping manner;

the clamping jaw mechanisms (13) are arranged at the inner sides of the horizontal ends of the corresponding brackets (10) respectively; the clamping jaw mechanism (13) is connected with the clamping piece (11); the clamping jaw mechanism (13) comprises:

the support block (13-1), the said support block (13-1) is fixed on right side inner wall of the vertical end in the support (10);

the first connecting piece (13-2) is arranged in the supporting block (13-1) in a penetrating way;

the second connecting piece (13-3) is hinged to the left side of the first connecting piece (13-2) through a hinge shaft, and the second connecting piece (13-3) is arranged on the front side of the first connecting piece (13-2); the left side of the second connecting piece (13-3) is hinged with the right side of the clamping piece (11) through a hinge shaft, and the second connecting piece (13-3) is arranged at the rear side of the clamping piece (11);

the driving table (13-4), the said driving table (13-4) is fixed to the outside of the left side of the first connecting piece (13-2), the driving table (13-4) contacts with inner wall of the horizontal end in the support (10);

the driving motor (13-5), the said driving motor (13-5) is fixed on the inner wall of the vertical end in the support (10), and the driving motor (13-5) is connected with the battery inside the pen body (1) and control switch on the pen body (1) separately;

the driving screw rod (13-6), the driving screw rod (13-6) is fixed on the output shaft of the driving motor (13-5), the right end of the driving screw rod (13-6) is connected with the supporting block (13-1) in a screwed way through a bearing, and the driving screw rod (13-6) is arranged in the driving table (13-4) in a penetrating way through screw threads in a rotating way;

the control switch drives the driving motor (13-5) to start, so that the driving screw rod (13-6) rotates, the driving table (13-4) moves, when the driving table (13-4) moves to the right, the first connecting piece (13-2) is driven to move to the right in the supporting block (13-1), the first connecting piece (13-2) pulls the second connecting piece (13-3), and therefore the clamping piece (11) rotates inwards around a rotating joint between the clamping piece and the rotating groove (10-1), and the clamping table (12) moves to the side close to the threaded push rod (7) so as to perform mounting or dismounting operation on the pen rack sleeve (9); conversely, when the pen rack sleeve (9) is arranged in the pen body (1), the driving motor (13-5) drives the driving table (13-4) to move leftwards, so that the first connecting piece (13-2) is pulled to move leftwards, the clamping piece (11) moves to one side close to the inner annular wall of the pen rack sleeve (9) around a rotating joint between the second connecting piece (13-3) and the rotating groove (10-1), and the clamping table (12) clamps the right inner wall of the pen rack sleeve (9), so that the pen rack sleeve (9) and the pen body (1) are more tightly and firmly arranged;

the two adjusting card mechanisms (14) are respectively arranged between the bracket (10) and the slot (9-1).

2. An insulin pump for facilitating needle replacement according to claim 1, wherein: the front side and the rear side of the first connecting piece (13-2) are respectively fixedly provided with a sliding rail (13-7), and the sliding rails (13-7) are arranged in the supporting blocks (13-1) in a left-right sliding manner; the slide rail (13-7) carries out sliding guide on the first connecting piece (13-2).

3. An insulin pump for facilitating needle replacement according to claim 1, wherein: the adjusting card mechanism (14) comprises:

the electric telescopic rod (14-1), the electric telescopic rod (14-1) is fixed on the inner annular wall of the slot (9-1), the pushing end of the electric telescopic rod (14-1) is fixedly connected with the horizontal end in the bracket (10), and the electric telescopic rod (14-1) is respectively connected with a battery in the pen body (1) and a control switch on the pen body (1);

the two connecting frames (14-2) are symmetrically arranged at the left side and the right side of the horizontal end in the bracket (10);

the two inserting blocks (14-3) are respectively fixed on the outer sides of the corresponding connecting frames (14-2);

the two guide frames (14-4) are respectively arranged at the left side and the right side of the electric telescopic rod (14-1), the guide frames (14-4) are fixed on the inner annular wall of the slot (9-1), and the insertion blocks (14-3) are inserted into the corresponding guide frames (14-4);

the control switch drives the electric telescopic rod (14-1) to start, so that the support (10) moves, the clamping piece (11) moves, the pen rack sleeve (9) is more convenient to operate, the support (10) drives the connecting rack (14-2) to move when moving, and the support is guided by the sliding fit of the guide rack (14-4) and the inserting block (14-3).

4. An insulin pump for facilitating replacement of needles according to claim 3, wherein: guide grooves (14-4-1) are formed in the left side and the right side of the guide frame (14-4), guide tables (14-5) are symmetrically fixed on one end of the insertion block (14-3) positioned in the guide frame (14-4) in a left-right symmetry mode, and the guide tables (14-5) are arranged in the guide grooves (14-4-1) in a sliding mode up and down; the guide table (14-5) stabilizes the movement of the insert block (14-3).

5. An insulin pump for facilitating replacement of needles according to claim 3, wherein: connecting blocks (14-6) are fixed on the vertical ends of the left side and the right side of the connecting frame (14-2), and the connecting blocks (14-6) are connected with the horizontal ends of the bracket (10).

6. The method of operating an insulin pump for facilitating needle replacement according to claim 1, wherein: when the refill (3) and the pen needle (5) are required to be replaced, the following three steps are required;

step one: rotating the pen refill holder (2) to be separated from the pen body (1); the clamping piece (11) rotates around a hinged rotating point between the clamping piece and the rotating groove (10-1) through the clamping jaw mechanism (13), so that the clamping table (12) moves to one side close to the threaded push rod (7), the clamping table (12) is away from the pen rack sleeve (9), the pen rack (2) can be conveniently rotated, and the pen rack sleeve (9) is away from the pen body (1);

step two: taking out the pen refill (3) from the right side of the pen refill frame (2), replacing the pen refill with a new pen refill (3), exposing a left needle cap of the new pen refill (3) to the left side of the pen refill frame (2), rotatably mounting a pen rack sleeve (9) on the right side of the pen refill frame (2) in the pen body (1), and penetrating a clamping piece (11) and a clamping table (12) in a slot (9-1) in the pen rack sleeve (9); then the needle cap is disinfected, and a new pen needle (5) is installed;

step three: the upper part and the lower part in the pen body (1) are rotated, so that the clamping table (12) clamps the inner wall of the right side of the pen rack sleeve (9); the clamping piece (11) rotates around a rotating joint between the clamping piece and the rotating groove (10-1) through the clamping jaw mechanism (13), so that the clamping table (12) moves to one side far away from the threaded push rod (7), the pen holder sleeve (9) is clamped, and the pen refill holder (2) and the pen body (1) are stably installed.