CN213284981U - Injection device of pre-filling and sealing injector - Google Patents

Abstract

The utility model discloses an injection device of embedment syringe in advance, include: the pen container is internally provided with a first channel which is communicated along the axial direction of the pen container; the pen core is arranged in the first channel and can move between a first position and a second position along the inner wall surface of the first channel; when the refill is at the second position, the injection needle extends out of the other end of the first channel; a mount rotatable along the second channel; one end of the mounting sleeve is detachably and rotatably connected with the mounting piece; first elastic component, one end links to each other with the installed part, and the cover is established on the refill, is located the second position at the syringe needle and accomplishes the injection after, and the installation cover can break away from with the installed part, and first elastic component drives the direction activity that installation cover and refill orientation deviate from the installed part, and the refill is got back to the first position. The injection device of the pre-filled and sealed injector can realize needle hiding before and after use, and has the advantages of simple structure, convenient use and the like.

Description

Injection device of pre-filling and sealing injector

Technical Field

The utility model belongs to the technical field of medical instrument, concretely relates to injection device of embedment syringe in advance.

Background

Present embedment syringe in advance all is in the exposed state before the injection with the injection after, the syringe needle, not only leads to the syringe needle to pollute easily, and the user need prick the needle when using in addition, impels the liquid medicine and pulls out operations such as needle, and the use procedure is loaded down with trivial details, still probably causes the accidental injury and increases the fear for the patient to patient or medical personnel.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

In view of this, the utility model provides an injection apparatus of embedment syringe in advance, this injection apparatus of embedment syringe in advance can directly take off the cap for injection when using, and the syringe needle all is in hidden needle state before the injection with when injecting, and has locking and injection apparatus, can avoid the maloperation, also can a key advance needle, injection and back of the needle, this injection apparatus of embedment syringe in advance has advantages such as simple structure, convenient to use and safety and sanitation.

According to the utility model discloses embedment syringe's injection device in advance, include: the pen container is formed into a columnar shape, and a first channel which penetrates through the pen container along the axial direction of the pen container is defined in the pen container; the pen core is arranged in the first channel and can move between a first position and a second position along the inner wall surface of the first channel; the injection needle is arranged at one end of the refill, the injection needle is positioned in the first channel when the refill is at a first position, and the injection needle extends out of the other end of the first channel when the refill is at a second position; the limiting sleeve is arranged at one end of the pen core so as to limit the movable position of the pen core along the first channel; the fixing piece is arranged at one end of the first channel, the fixing piece is formed into a column shape, and a second channel which penetrates through the fixing piece along the axial direction of the fixing piece is arranged in the fixing piece; the mounting piece is inserted into the second channel at one end, and can rotate along the second channel; the mounting sleeve is formed into a column shape, a third channel which is through along the axial direction of the mounting piece is arranged in the mounting piece, and one end of the mounting sleeve is detachably and rotatably connected with the mounting piece; first elastic component, first elastic component establishes in the installation cover, the one end of first elastic component with the installed part links to each other, the other end orientation of first elastic component deviates from the direction of pen container extends, first elastic component establishes in the cover on the refill the syringe needle is located after the injection is accomplished to the second position, the installation cover can with the installed part breaks away from, first elastic component drives the installation cover with the refill orientation deviates from the direction activity of installed part, the refill is got back to first position.

According to the utility model discloses injection device of embedment syringe in advance adopts pen container, refill, syringe needle, stop collar, mounting, installed part, installation cover and the structure that first elastic component combined together, moves about between primary importance and second place along the pen container inner wall through control refill, can drive the syringe needle when the injection and stretch out the pen container to hidden needle when realizing the injection. After the injection, the installation sleeve can break away from with the installed part, first elastic component can drive the direction activity that installation sleeve and refill orientation deviate from the installed part, the refill gets back to primary importance to can drive the syringe needle and get back to in the pen container, realize the back of the needle, this injection device of embedment syringe in advance can realize before the injection, the whole process after the injection in-process and the injection is hidden the needle and has locking and injection device, can avoid the maloperation, also can the key advance the needle, injection and back of the needle, have simple structure, advantages such as convenient to use and safety and sanitation.

According to the utility model discloses embedment syringe's injection device in advance can also have following additional technical characterstic:

according to an embodiment of the utility model, the injection device of embedment syringe still includes in advance: the pen core buckle is arranged at the other end of the pen core.

According to an embodiment of the utility model, the injection device of embedment syringe still includes in advance: the one end of driving piece with the refill buckle links to each other, the other end of driving piece dorsad the refill extends, be equipped with the installation department on the driving piece.

According to an embodiment of the invention, the mounting portion is formed as an annular boss extending in the circumferential direction of the driving member and protruding radially outwards therealong.

According to an embodiment of the utility model, the injection device of embedment syringe still includes in advance: and the second elastic piece is sleeved at the other end of the driving piece.

According to an embodiment of the utility model, the injection device of embedment syringe still includes in advance: the driving sleeve is internally provided with a fourth channel which is communicated along the axial direction of the driving sleeve, the second elastic piece is arranged in the fourth channel, and the driving piece extends into the fourth channel towards one end of the second elastic piece and can move along the axial direction of the fourth channel.

According to the utility model discloses an embodiment, be equipped with first spacing portion in the drive sleeve, the driving piece with first spacing portion can be dismantled and link to each other.

According to an embodiment of the utility model, the injection device of embedment syringe still includes in advance: the knob is internally provided with a fifth channel which is communicated along the axial direction of the knob, and one end of the knob is clamped with one end of the pen container, which deviates from the injection needle.

According to an embodiment of the utility model, the injection device of embedment syringe still includes in advance: and one end of the button is arranged in the knob and can move along the axial direction of the fifth channel, the button squeezes the driving piece when moving along the other end of the knob, the driving piece is pushed to be separated from the driving sleeve, and the driving piece moves towards the pen core and pushes the pen core to move to the second position.

According to an embodiment of the utility model, the injection device of embedment syringe still includes in advance: and the pen cap is arranged at the other end of the first channel so as to open and close the other end of the first channel.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of an injection device of a pre-filled syringe according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of an injection device of a pre-filled syringe in an uninjected state according to an embodiment of the present invention;

fig. 3 is a partial cross-sectional view of an injection device of a pre-filled syringe in an injection state according to an embodiment of the present invention;

fig. 4 is a partial schematic view of an injection device of a pre-filled syringe in a locked position according to an embodiment of the present invention;

fig. 5 is a partial schematic view of an injection device of a pre-filled syringe in an injection position according to an embodiment of the present invention;

FIG. 6 is a partial cross-sectional view of FIG. 5;

fig. 7 is a partial assembly schematic view of an injection device of a pre-filled syringe in a locked position according to an embodiment of the present invention;

fig. 8 is a partial cross-sectional view of an injection device of a pre-filled syringe in a locked position according to an embodiment of the present invention;

fig. 9 is a schematic view of a partial assembly of an injection device of a pre-filled syringe in an injectable position according to an embodiment of the present invention;

fig. 10 is a partial cross-sectional view of an injection device of a pre-filled syringe in an injectable position according to an embodiment of the present invention;

fig. 11 is a partial installation view of an injection device of a pre-filled syringe according to an embodiment of the present invention;

fig. 12 is a partial exploded view of an injection device of a pre-filled syringe according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a button according to an embodiment of the present invention;

fig. 14 is a schematic view of an assembly of a driving member and a mounting groove according to an embodiment of the present invention.

Reference numerals:

an injection device 200 that pre-fills the syringe;

a pen container 10; a first channel 11;

a pen core 20; a second stopper portion 21; a rubber plug 22;

an injection needle 30;

a limit sleeve 40;

a fixing member 50; a second channel 51;

a mounting member 60;

a mounting sleeve 70;

a first elastic member 80;

a cartridge fastener 90; a mounting groove 91; a driver 100; a mounting portion 101; a projection 102;

a second elastic member 110; a drive sleeve 120; a knob 130; a button 140; a pen cap 150; a needle cap 160.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience of description and simplicity of description, and are not intended to indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An injection device 200 of a pre-filled syringe according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 14, an injection device 200 of a pre-filled and sealed syringe according to an embodiment of the present invention includes a barrel 10, a cartridge 20, an injection needle 30, a restraining sleeve 40, a fixing member 50, a mounting member 60, a mounting sleeve 70, and a first elastic member 80.

Specifically, the pen container 10 is formed in a columnar shape, a first channel 11 penetrating along the axial direction of the pen container 10 is defined in the pen container 10, the pen core 20 is arranged in the first channel 11, the pen core 20 can move between a first position and a second position along the inner wall surface of the first channel 11, the injection needle 30 is arranged at one end of the pen core 20, when the pen core 20 is at the first position, the injection needle 30 is arranged in the first channel 11, when the pen core 20 is at the second position, the injection needle 30 extends out of the other end of the first channel 11, the limiting sleeve 40 is arranged at one end of the pen core 20 to limit the moving position of the pen core 20 along the first channel 11, the fixing member 50 is arranged at one end of the first channel 11, the fixing member 50 is formed in a columnar shape, a second channel 51 penetrating along the axial direction of the fixing member 50 is arranged in the fixing member 50, one end of the mounting member 60 is inserted in the second channel 51, the mounting member 60 can rotate along the second channel, the one end of installation cover 70 can be dismantled the rotation with installed part 60 and link to each other, first elastic component 80 is established in installation cover 70, the one end of first elastic component 80 links to each other with installed part 60, the other end orientation of first elastic component 80 deviates from the direction extension of pen container 10, first elastic component 80 cover is established on refill 20, be located the second position at syringe needle 30 and accomplish the injection back, installation cover 70 can break away from with installed part 60, first elastic component 80 drives installation cover 70 and refill 20 towards the direction activity that deviates from installed part 60, refill 20 returns first position.

In other words, the injection device 200 of the pre-filled and sealed syringe according to the embodiment of the present invention mainly comprises a pen container 10, a pen core 20, an injection needle 30, a limiting sleeve 40, a fixing member 50, a mounting member 60, a mounting sleeve 70 and a first elastic member 80, wherein the pen container 10 may be formed in a column shape, a first channel 11 penetrating along an axial direction of the pen container 10 may be defined in the pen container 10, the pen core 20 may be disposed in the first channel 11, the pen core 20 may move between a first position and a second position along an inner wall surface of the first channel 11, and the injection needle 30 may be disposed at one end of the pen core 20. When the cartridge 20 is in the first position, the injection needle 30 is located in the first channel 11, and when the cartridge 20 is in the second position, the injection needle 30 can extend out of the other end of the first channel 11, that is, during injection, the cartridge 20 can move from the first position to the second position, so that hidden needle injection can be realized.

In addition, a limiting sleeve 40 may be provided at one end of the cartridge 20 to limit the movable position of the cartridge 20 along the first channel 11, and a fixing member 50 may be provided at one end of the first channel 11. The fixing member 50 may be formed in a cylindrical shape, a second passage 51 may be formed in the fixing member 50 to extend through the fixing member in an axial direction thereof, one end of the mounting member 60 may be inserted into the second passage 51, and the mounting member 60 may rotate along the second passage 51. The mounting sleeve 60 may be formed in a cylindrical shape, and a third passage may be provided in the mounting member 60 to pass therethrough in an axial direction thereof. One end of the mounting sleeve 70 can be detachably and rotatably connected with the mounting part 60, the mounting part 60 can rotate along the circumferential direction of the mounting sleeve 70, the first elastic part 80 can be arranged in the mounting sleeve 70, one end of the first elastic part 80 can be connected with the mounting part 60, and the other end of the first elastic part 80 can extend towards the direction departing from the pen container 10. The first elastic element 80 can be sleeved on the pen core 20, after the injection needle 30 is located at the second position to complete injection, the mounting sleeve 70 can be separated from the mounting part 60, the first elastic element 80 can drive the mounting sleeve 70 and the pen core 20 to move towards the direction departing from the mounting part 60, and the pen core 20 can return to the first position. That is, after the injection is completed, the mounting sleeve 70 can be separated from the mounting member 60, and under the effect of the first elastic member 80 rebounding from the compressed state, the mounting sleeve 70 and the pen core 20 synchronously move along the axial direction thereof in the direction away from the mounting member 60, so that the needle return is realized.

Therefore, according to the utility model discloses injection device 200 of embedment syringe in advance adopts pen container 10, refill 20, syringe needle 30, stop collar 40, mounting member 50, installed part 60, installation cover 70 and the structure that first elastic component 80 combined together, through control refill 20 along the activity of pen container 10 inner wall between primary importance and second place, can drive syringe needle 30 and stretch out pen container 10 when injecting to hidden needle during the injection. After injection, the mounting sleeve 70 can be separated from the mounting part 60, the first elastic piece 80 can drive the mounting sleeve 70 and the pen core 20 to move towards the direction departing from the mounting part 60, the pen core 20 returns to the first position, so that the injection needle 30 can be driven to return into the pen container 10, and needle return is realized.

According to an embodiment of the utility model, the injection device 200 of pre-potting syringe still can include refill buckle 90, and the other end at refill 20 can be established to refill buckle 90's one end, and refill buckle 90's one end can link to each other with refill 20, the installation of refill 20 of being convenient for.

According to an embodiment of the utility model, the injection device 200 of embedment syringe in advance still includes driving piece 100, and the one end of driving piece 100 links to each other with refill buckle 90, and accessible refill buckle 90 is connected between driving piece 100 and the refill 20, and driving piece 100 can drive refill 20 and move from the primary importance to the second place, and the other end of driving piece 100 extends to refill 20 dorsad, can be equipped with installation department 101 on the driving piece 100, the installation of second elastic component 110 of can being convenient for.

Preferably, as shown in fig. 6, a rubber plug 22 is disposed in the pen core 20, one side of the rubber plug 22 is connected to the medical fluid in the pen core 20, and the other side of the rubber plug 22 is connected to the driving member 100, and the driving member 100 can drive the rubber plug 22 to move toward the injection needle 30, so as to advance the medical fluid injection.

Preferably, as shown in fig. 5 and 6, the cartridge catch 90 is provided with a mounting groove 91 along a thickness direction thereof, one end of the cartridge 20 connected to the cartridge catch 90 is provided with a second limiting portion 21, the second limiting portion 21 is formed as a first annular boss extending along a circumferential direction of the second limiting portion 21 and protruding outward along a radial direction thereof, and the second limiting portion 21 can be snapped in the mounting groove 91 to limit a moving range of the cartridge 20 along an axial direction thereof.

Alternatively, the mounting portion 101 is formed as a second annular boss extending in the circumferential direction of the driver 100 and projecting radially outward therefrom, which may define the movable range of the driver 100 in the axial direction thereof.

That is, during injection, one end of the driving member 100 is connected to the second stopper 21 and drives the pen core 20 to move in the axial direction of the injection needle 30, and after the injection is completed, the pen core 20 moves from the first position to the second position. The both ends of first elastic component 80 can be respectively the joint in installed part 60 and installation cover 70, and the back of having injected, the one end that first elastic component 80 and installed part 60 link to each other is radial to be rotated, and the axial is motionless, and the reverse activity of first elastic component 80 other end, installation cover 70 can drive driving piece 100, refill 20 and refill buckle 90 towards the direction that deviates from syringe needle 30 along its axial activity, and refill 20 can be followed the second position and moved to the first position, realizes the back of the needle.

Further, the injection device 200 of the pre-filled syringe may further include a second elastic member 110, and the second elastic member 110 is sleeved on the other end of the driving member 100.

In some embodiments of the present invention, the injection device 200 of the pre-filled and sealed syringe may further include a driving sleeve 120, a fourth channel penetrating along an axial direction of the driving sleeve 120 is disposed in the driving sleeve 120, the second elastic member 110 is disposed in the fourth channel, the driving member 100 extends into the fourth channel toward one end of the second elastic member 110 and is movable along the axial direction of the fourth channel, and the other end of the second elastic member 110 may stop against one end of the driving sleeve 120. That is, in the non-injection state, as shown in fig. 2, one end of the second elastic member 110 is connected to the side of the annular boss facing away from the pen core 20, and the other end of the second elastic member 110 extends into the fourth channel and abuts against one end of the driving sleeve 120, and the second elastic member 120 is in a compressed state.

Preferably, a first position-limiting portion may be disposed in the driving sleeve 120, the first position-limiting portion may form a through position-limiting rib, and the driving member 100 is detachably connected to the first position-limiting portion, that is, when the injection is not performed, one end of the driving member 100 is connected to the first position-limiting portion, and the second elastic member 110 is in a compressed state.

According to an embodiment of the present invention, the injection device 200 of the pre-filled syringe may further include a knob 130, a fifth channel axially penetrating through the knob 130 is disposed in the knob 130, one end of the knob 130 is connected to the end of the pen container 10 away from the injection needle 30, and a limiting rib may be disposed on the inner wall of the knob 130.

Preferably, the end of the barrel 10 connected to the knob 130 is provided with a through-going limiting groove along the wall thickness thereof, which can limit the rotation range of the knob 130 along the barrel 10.

According to an embodiment of the present invention, the injection device 200 of the pre-filled syringe may further include a button 140, one end of the button 140 is disposed in the knob 130 and is movable along the axial direction of the fifth channel, the button 140 may press the driving member 100 when moving along the other end of the knob 130, the driving member 100 is pushed to be separated from the driving sleeve 120, and the driving member 100 moves toward the cartridge 20 and pushes the cartridge 20 to move to the second position.

That is, during injection, as shown in fig. 3, the button 140 and the knob 130 can rotate synchronously by the limiting rib on the inner wall of the knob 130, and at this time, the knob 130 can rotate and cannot move. The tip of drive sleeve 120 has the spacing muscle of ending to lead to, button 140 presses the back, driving piece 100 can break away from with drive sleeve 120, at this moment second elastic component 110 under the effect of compression state restoring force, refill 20 accessible refill buckle 90 is connected with driving piece 100, the orientation deviates from button 140's direction along the axial activity in step, refill 20 can move about to the second position from the first position, thereby can realize the injection of inserting the needle, be convenient for realize hidden needle injection, the structure has simple compactness, high durability and convenient use, advantages such as swift and health.

Preferably, as shown in fig. 5 to 14, the through-stop limiting rib may be engaged with the second elastic member 110 to achieve locking after needle withdrawal and unlocking during injection, the driving member 100 is provided with a protrusion 102 at one end facing the button 140, the protrusion 102 includes two movable portions, when the button 140 is located at the locking position, the second elastic member 110 is formed as a spring, the second elastic member 110 may be sleeved on one end of the driving member 100 and extend into the driving sleeve 120, the two portions of the protrusion 102 may be close to and extend out of the other end of the driving sleeve 120, then the two portions of the protrusion 102 may be automatically separated and engaged with the other end of the driving sleeve 120, the button 140 is not pressed, after the button 140 is pressed at the injectable position, the two portions of the protrusion 102 may be folded, and under the action of the second elastic member 110, the engaged portion of the driving member 100 and the other end of the driving sleeve 120 may be separated and needle insertion may be achieved.

Preferably, the injection device 200 of the pre-filled syringe may further include a cap 150, and the cap 150 may be provided at the other end of the first channel 11 to open and close the other end of the first channel 11. In use, the cap 150 is removed for injection; after use, the cap 150 is worn to prevent dust and the like from entering the barrel 10 when the injection device 200 of the prefilled syringe is not in use and affecting the cleanliness of the injection needle 30.

Further, as shown in fig. 1, the injection device 200 of the pre-filled syringe may further include a needle cap 160, the needle cap 160 is disposed on the injection needle 30, a receiving cavity opened toward the pen core 20 is defined in the needle cap 160, a first tooth space is defined on an inner wall surface of the pen cap 150, a second tooth space matched with the first tooth space is defined on an outer circumference of the needle cap 160, the first tooth space and the second tooth space are engaged with each other when the pen cap 150 is worn, and the needle cap 160 may be removed together when the pen cap 150 is removed.

In summary, according to the utility model discloses an injection apparatus 200 of embedment syringe in advance, adopt pen container 10, refill 20, syringe needle 30, stop sleeve 40, mounting member 50, installed part 60, the structure that mounting sleeve 70 and first elastic component 80 combined together, through drive refill 20 along the activity of pen container 10 inner wall between primary importance and secondary importance, can drive syringe needle 30 and can stretch out pen container 10 when injecting, hide the needle when realizing injecting, and after injecting, mounting sleeve 70 can break away from with installed part 60, first elastic component 80 can drive mounting sleeve 70 and refill 20 towards the direction activity that deviates from installed part 60, refill 20 returns to primary importance, thereby can drive syringe needle 30 and return in pen container 10, realize the needle return. And the injection device 200 of the pre-filled syringe is provided with a locking device and an injection device, so that misoperation can be avoided, and needle insertion, injection and needle return can be realized by one key, and the injection device 200 of the pre-filled syringe has the advantages of simple structure, convenience in use, safety, sanitation and the like.

In the description herein, references to the description of "one embodiment," "some embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An injection device for pre-filled syringes, comprising:

the pen container is formed into a columnar shape, and a first channel which penetrates through the pen container along the axial direction of the pen container is defined in the pen container;

the pen core is arranged in the first channel and can move between a first position and a second position along the inner wall surface of the first channel;

the injection needle is arranged at one end of the refill, when the refill is at the first position, the injection needle is positioned in the first channel, and when the refill is at the second position, the injection needle extends out of the other end of the first channel;

the limiting sleeve is arranged at one end of the pen core so as to limit the movable position of the pen core along the first channel;

the fixing piece is arranged at one end of the first channel, the fixing piece is formed into a column shape, and a second channel which penetrates through the fixing piece along the axial direction of the fixing piece is arranged in the fixing piece;

the mounting piece is inserted into the second channel at one end, and can rotate around the axis of the second channel;

the mounting sleeve is formed into a column shape, a third channel which is through along the axial direction of the mounting piece is arranged in the mounting piece, and one end of the mounting sleeve is detachably connected with the mounting piece;

the pen container comprises a mounting piece, a first elastic piece, a second elastic piece and a pen container, wherein the mounting piece is arranged in the mounting sleeve, one end of the first elastic piece is connected with the mounting piece, the other end of the first elastic piece faces away from the pen container and extends in the direction, the first elastic piece is sleeved on the pen core, the injection needle is located at the second position after injection is completed, the mounting sleeve can be separated from the mounting piece, the first elastic piece drives the mounting sleeve and the pen core back to the mounting piece to move, and the pen core returns to the first position.

2. The injection apparatus of the pre-filled syringe as recited in claim 1, further comprising:

the pen core buckle is arranged at the other end of the pen core.

3. The injection apparatus of the pre-filled syringe as recited in claim 2, further comprising:

the one end of driving piece with the refill buckle links to each other, the other end of driving piece dorsad the refill extends, be equipped with the installation department on the driving piece.

4. The injection apparatus of the pre-filled and sealed syringe as set forth in claim 3, wherein the mounting portion is formed as an annular boss extending in a circumferential direction of the driver and projecting radially outwardly therefrom.

5. The injection apparatus of the pre-filled syringe as recited in claim 4, further comprising:

and the second elastic piece is sleeved at the other end of the driving piece.

6. The injection apparatus of the pre-filled syringe as recited in claim 5, further comprising:

the driving sleeve is internally provided with a fourth channel which is communicated along the axial direction of the driving sleeve, the second elastic piece is arranged in the fourth channel, and the driving piece extends into the fourth channel towards one end of the second elastic piece and can move along the axial direction of the fourth channel.

7. The injection device for the pre-filled and sealed syringe as recited in claim 6, wherein a first position-limiting portion is disposed in the driving sleeve, and the driving member is detachably connected to the first position-limiting portion.

8. The injection apparatus of the pre-filled syringe as recited in claim 7, further comprising:

the knob is internally provided with a fifth channel which is communicated along the axial direction of the knob, and one end of the knob is clamped with one end of the pen container, which deviates from the injection needle.

9. The injection apparatus of the pre-filled syringe as recited in claim 8, further comprising:

and one end of the button is arranged in the knob and can move along the axial direction of the fifth channel, the button squeezes the driving piece when moving along the other end of the knob, the driving piece is pushed to be separated from the driving sleeve, and the driving piece moves towards the pen core and pushes the pen core to move to the second position.

10. The injection apparatus of the pre-filled syringe as recited in claim 1, further comprising:

and the pen cap is arranged at the other end of the first channel so as to open and close the other end of the first channel.

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