CN108434556A - Injection pen - Google Patents
Injection pen Download PDFInfo
- Publication number
- CN108434556A CN108434556A CN201810498480.7A CN201810498480A CN108434556A CN 108434556 A CN108434556 A CN 108434556A CN 201810498480 A CN201810498480 A CN 201810498480A CN 108434556 A CN108434556 A CN 108434556A
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- CN
- China
- Prior art keywords
- hidden
- needle
- hidden needle
- injection
- injection pen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5086—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile for indicating if defective, used, tampered with or unsterile
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention provides a kind of injection pens, are related to the field of medical instrument technology, and injection pen provided by the invention includes that injection pen tube, hidden needle protection mechanism and injection mechanism, injection mechanism include needle tubing and syringe needle；Hidden needle protection mechanism includes hidden needle elastic parts, hidden needle guard and retaining claw, and hidden needle guard is sheathed on syringe needle, and the first end of hidden needle guard is located at outside injection pen tube, and the second end of hidden needle guard is located in injection pen tube and is connect with hidden needle elastic parts；Retaining claw is arranged in one end of the installation syringe needle of needle tubing；Hidden needle guard is equipped with the embedding hole coordinated with retaining claw, the side wall of hidden needle guard is run through in embedding hole, when the relatively hidden needle of the second end of hidden needle guard is moved into injection pen tube, elastic parts compresses, retaining claw is caught in embedding hole, and the hidden needle elastic parts of compression is for making hidden needle guard drive retaining claw dynamic to injection pen tube outward transport.Injection pen provided by the invention alleviates injection pen in the related technology is difficult to that the technical issues of whether having been used differentiated.
Description
Technical field
The present invention relates to the field of medical instrument technology, more particularly, to a kind of injection pen.
Background technology
Syringe is a kind of common medical instruments, and mainly to liquid medicine injection or drawing liquid, injection pen is the one of syringe
Kind is mainly used for injection trace drug generally needs insulin injection or adrenergic patient, such as insulin and adrenaline
Oneself injects drug by defined component and time, and existing injection pen has had the function of accurate injection dosage.
Partial syringe pen in the related technology is exposed to outside using rear injection needle, easily injection needle is made to be damaged, and part is noted
The injection needle of pen is penetrated by protecting structure to be protected, in injection process, injection needle is stretched out from protection structure, using preceding and make
It is automatically returned to rear injection needle in protection structure, the injection pen that injection needle is respectively positioned in protection structure, which is difficult to differentiate, is
It is no to have been used.
Invention content
The purpose of the present invention is to provide a kind of injection pen, with alleviate injection pen in the related technology be difficult to differentiate whether by
The technical issues of use.
Injection pen provided by the invention includes：Inject pen tube, hidden needle protection mechanism and injection mechanism, the injection mechanism packet
Needle tubing and syringe needle are included, the needle tubing is set in the injection pen tube, and the syringe needle is installed on one end of the needle tubing, and is located at institute
It states outside injection pen tube；
The hidden needle protection mechanism includes hidden needle elastic parts, hidden needle guard and retaining claw, and the hidden needle guard is sheathed on institute
Syringe needle is stated, the first end of the hidden needle guard is located at outside the injection pen tube, and the second end of the hidden needle guard is located at the injection pen
It is connect in pipe and with the hidden needle elastic parts；The retaining claw blocks and sets between the syringe needle and the hidden needle guard
In one end of the installation syringe needle of the needle tubing；
The hidden needle guard is equipped with the embedding hole coordinated with the retaining claw, and the side wall of the hidden needle guard is run through in the embedding hole,
The retaining claw is between the needle tubing and the embedding hole, and the relatively described syringe needle of second end of the hidden needle guard is to the note
When penetrating movement in pen tube, the hidden needle elastic parts compression, the retaining claw is caught in the embedding hole, the hidden needle bullet of compression
Property component for making the hidden needle guard that the retaining claw be driven to be moved to injection pen tube outward transport.
Further, the hidden needle elastic parts includes hidden needle spring and hidden needle spring set, is equipped in the injection pen tube
First catch, the hidden needle spring set have the first guide pin, and first guide pin passes through first catch, and with it is described
First catch is slidably matched, and the hidden needle guard is connected with the hidden needle spring set；
The hidden needle spring is between first catch and the hidden needle guard, and the hidden needle spring is respectively with described
One catch and the hidden needle spring set connection.
Further, the hidden needle guard is connected by the second guide pin and the hidden needle spring set, in the injection pen tube
It is additionally provided with the second catch, second catch is located between the hidden needle spring set and the hidden needle guard, second guide pin
It is slidably matched across second catch, and with second catch.
Further, the outer wall fixing sleeve of the hidden needle spring set is equipped with baffle ring, the baffle ring respectively with the hidden needle bullet
Spring is connected with second guide pin.
Further, the retaining claw includes snap ring and multiple pawls, the multiple circumferential directions of the pawl along the snap ring
It is spaced apart, and is fixedly connected with the snap ring；
The quantity in the embedding hole is equal with the quantity of pawl, and coordinates with multiple one-to-one correspondence of falling pawl.
Further, the injection mechanism further includes injection spring, and the needle tubing includes liquid storage tube and push rod, described
One end of push rod is located in the liquid storage tube, the other end runs through first catch, and matches with first catch sliding
It closes；One end of the injection spring is connect with the push rod, the other end is connect with first catch；
First catch is equipped with pre- locking assembly away from the side of the injection spring, and the pre- locking assembly is used for
It locks or discharges the push rod, when locking the push rod, the injection spring makes the push rod have to close to the syringe needle side
To the trend of movement.
Further, the pre- locking assembly includes pre- locking lid and positive stop bead, and the pre- locking lid is covered on the note
Penetrate one end far from the hidden needle guard of pen tube；
The pre- locking lid has the cylindrical groove coordinated with the push rod, and the push rod can the into and out cylindricality
The circumferential wall of slot, the push rod and cylindrical groove cooperation is equipped with the first limit hole, and the side wall of the cylindrical groove is equipped with the second limit
Position hole, second limit hole run through the side wall of the cylindrical groove, and the outer wall of first guide pin and the cylindrical groove slides
Cooperation, first guide pin are equipped with third limit hole；
When the injection pen is not used, the positive stop bead is located at first limit hole and second limit hole, so that
The injection spring is in compressive state, and the hidden needle guard pushes the hidden needle spring set movement, the third limit hole and institute
State the second limit hole it is opposite when, the positive stop bead enter second limit hole and the third limit hole, to be pushed away described in release
Bar.
Further, the injection spring is sheathed on the push rod.
Further, the push rod is hollow structure, and the injection spring is set in the push rod.
Further, the hidden needle spring set is hollow structure, and the push rod runs through the hidden needle spring set.
For injection pen provided by the invention by before use, retaining claw is located in injection pen tube, hidden needle guard is sheathed on syringe needle
Outside reduces syringe needle and is damaged；Injection pen is directed at injection site when use, hidden needle guard, hidden needle are pressed by injection site
It covers and is moved to the inside of injection pen tube, elastic parts is compressed, and syringe needle piercing is injected position, while retaining claw falls into embedding hole
And elastic force is generated outward, it is then injected, in injection process, retaining claw is located in embedding hole, prevents hidden needle guard with respect to needle tubing
It is moved with syringe needle, improves stability when injection, reduction causes unnecessary injury to user, extracted rapidly after injection
Syringe needle is injected position and disappears to the active force of hidden needle guard, and under the action of elastic parts restoring force, hidden needle guard drives locking card
Pawl is to the external movement of injection pen tube, and hidden needle guard is sheathed on outside syringe needle again, also, retaining claw passes through embedding hole and injection pen
The end face of pipe contacts, and hidden needle guard is prevented to be again introduced into injection pen tube and keep syringe needle exposed, also, can by retaining claw whether with
The end face contact for injecting pen tube, judges whether injection pen has been used.
Description of the drawings
Technical solution in order to illustrate more clearly of the specific embodiment of the invention or in the related technology, below will be to specific
Attached drawing is briefly described needed in embodiment or description of Related Art, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Sectional view when Fig. 1 is the first state of injection pen provided in an embodiment of the present invention；
Sectional view when Fig. 2 is the second state of injection pen provided in an embodiment of the present invention；
Sectional view when Fig. 3 is the third state of injection pen provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram that the hidden needle spring of injection pen provided in an embodiment of the present invention covers；
Fig. 5 is the structural schematic diagram of the hidden needle guard of injection pen provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the retaining claw of injection pen provided in an embodiment of the present invention.
Icon：100- injects pen tube；The first catch of 110-；The second catch of 120-；The hidden needle springs of 211-；212- is hidden
Needle spring set；The first guide pins of 213-；214- baffle rings；215- third limit holes；The hidden needle guards of 220-；The embedding holes 221-；
The second guide pins of 222-；230- retaining claws；231- snap rings；232- falls pawl；311- liquid storage tubes；312- push rods；
320- syringe needles；330- injection springs；The pre- locking lids of 341-；342- positive stop beads.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As shown in Figure 1 to Figure 3, injection pen provided in an embodiment of the present invention includes：Inject pen tube 100, hidden needle protection mechanism
And injection mechanism, injection mechanism include needle tubing and syringe needle 320, needle tubing is set in injection pen tube 100, and syringe needle 320 is installed on needle tubing
One end, and positioned at injection pen tube 100 outside；Hidden needle protection mechanism includes hidden needle elastic parts, hidden needle guard 220 and retaining claw
230, hidden needle guard 220 is sheathed on syringe needle 320, and the first end of hidden needle guard 220 is located at outside injection pen tube 100, and the second of hidden needle guard 220
End is located in injection pen tube 100 and is connect with hidden needle elastic parts；Retaining claw 230 be located at syringe needle 320 and hidden needle guard 220 it
Between, and it is arranged in one end of the installation syringe needle 320 of needle tubing；Hidden needle guard 220 is equipped with the embedding hole 221 coordinated with retaining claw 230, embedding
The side wall of hidden needle guard 220 is run through in hole 221, and retaining claw 230 is between needle tubing and embedding hole 221, the second end phase of hidden needle guard 220
When being moved into injection pen tube 100 to syringe needle 320, hidden needle elastic parts compression, retaining claw 230 is caught in embedding hole 221, compression
Hidden needle elastic parts is for making hidden needle guard 220 that retaining claw 230 be driven to be moved to outside injection pen tube 100.
Specifically, injection pen tube 100 includes the first pen tube and the second pen tube, hidden needle elastic parts is set in the first pen tube,
Needle tubing, hidden needle guard 220 and retaining claw 230 are set to the second pen tube, and the first pen tube is connect with the second pen tube by way of clamping,
And it is interconnected.
Further, hidden needle elastic parts includes hidden needle spring 211 and hidden needle spring set 212, injects and is equipped in pen tube 100
First catch 110, hidden needle spring set 212 have the first guide pin 213, and the first guide pin 213 passes through the first catch 110, and with
First catch 110 is slidably matched, and hidden needle guard 220 is connect with hidden needle spring set 212；Hidden needle spring 211 be located at the first catch 110 with
Between hidden needle guard 220, hidden needle spring 211 is connect with the first catch 110 and hidden needle spring set 212 respectively.
As shown in Figure 1 to Figure 3, the first catch 110 is fixedly connected on the end far from hidden needle guard 220 in injection pen tube 100,
The end face opposite with the first catch 110 of hidden needle spring set 212 is equipped with the first guide pin 213, as shown in figure 4, hidden needle spring set
It is set on 212 there are two the first guide pin 213, the section of two the first guide pins 213 is oppositely arranged, and section is in circular ring shape；The
It is set on one catch 110 there are two arc-shaped through-hole, two the first guide pins 213 pass through two arc-shaped through-holes correspondingly, and
It is slidably matched with the first catch 110.Hidden needle spring 211 is sheathed on the outside of hidden needle spring set 212, the upper end of hidden needle spring 211
It is contacted with the first catch 110, lower end is connect with hidden needle spring set 212, and the lower end of hidden needle spring set 212 is connect with hidden needle guard 220.
When hidden needle guard 220 is moved into injection pen tube 100, hidden needle guard 220 pushes hidden needle spring set 212 to move upwards, hidden needle spring 211
It is compressed, after being injected position to the active force disappearance of hidden needle guard 220, under the action of hidden 211 restoring force of needle spring, makes hidden needle
Set 220 drives retaining claw 230 to injection 100 external movement of pen tube.The above-mentioned setting of hidden needle elastic parts makes hidden needle guard 220 exist
After the completion of injection automatic traction retaining claw 230 to injection 100 external movement of pen tube, meanwhile, hidden needle spring 211 be set to hidden needle bullet
The stabilization when compression of hidden needle spring 211 and elongation is improved the outside of spring set 212 to the guiding role that hidden needle spring 211 plays
Property.
Further, hidden needle guard 220 is connect by the second guide pin 222 with hidden needle spring set 212, is injected in pen tube 100
It is additionally provided with the second catch 120, the second catch 120 is located between hidden needle spring set 212 and hidden needle guard 220, and the second guide pin 222 is worn
The second catch 120 is crossed, and is slidably matched with the second catch 120.
Specifically, the second catch 120 is set between hidden needle spring set 212 and hidden needle guard 220, hidden needle guard 220 and second gear
The opposite end face of piece 120 is equipped with the second guide pin 222, as shown in figure 5, being set on hidden needle guard 220, there are two the second guide pins
222, two the second guide pins 222 are oppositely arranged, and section is arc-shaped, and are set on the second catch 120 there are two arc-shaped through-hole, two
Second guide pin 222 passes through two arc-shaped through-holes correspondingly, and is slidably matched with the second catch 120, two second guiding
The upper end of piece 222 is connect with hidden needle spring set 212；The upper end of hidden needle guard 220 is sheathed on the lower end of needle tubing, hidden needle guard 220
Outer wall is contacted with the inner wall of injection pen tube 100, and needle tubing plays guiding role with the injection cooperation of pen tube 100 to hidden needle guard 220.Hidden needle
Set 220 is connect by the second guide pin 222 with hidden needle spring set 212, while realizing that power transmits, reduces the space occupied.
Further, the outer wall fixing sleeve of hidden needle spring set 212 is equipped with baffle ring 214, baffle ring 214 respectively with hidden needle spring
211 and second guide pin 222 connect.
As shown in figure 4,214 fixing sleeve of baffle ring is set to the lower end of hidden needle spring set 212, baffle ring 214 is led positioned at two second
To between piece 222, on two the second guide pins 222 end face opposite with baffle ring 214, it is equipped with the groove coordinated with baffle ring 214, gear
Ring 214 is connected in groove, realizes the connection of the second guide pin 222 and baffle ring 214.Hidden needle spring 211 is sheathed on hidden needle spring
The outside of set 212, the upper surface of hidden needle spring 211 are contacted with the first catch 110, lower face and the baffle ring 214 of hidden needle spring 211
End face contact, baffle ring 214 and the first catch 110 coordinate plays position-limiting action to hidden needle spring 211.
Further, retaining claw 230 includes snap ring 231 and multiple pawls 232, multiple weeks of the pawl 232 along snap ring 231
To being spaced apart, and it is fixedly connected with snap ring 231；The quantity in embedding hole 221 is equal with the quantity of pawl 232, and with it is multiple fall
Pawl 232 corresponds cooperation.
In some embodiments, the quantity of pawl 232 can be three, four or five etc., in the present embodiment, pawl 232
Quantity be four, as shown in fig. 6, four fall pawl 232 be uniformly distributed along the circumferential direction of snap ring 231, and with snap ring 231 fix connect
It connects；Snap ring 231 is sheathed on the position of the installation syringe needle 320 of needle tubing, and the internal diameter of snap ring 231 is less than the diameter of needle tubing, prevents card
Ring 231 moves up；The end face opposite with hidden needle guard 220 of pawl 232 is equipped with clamping protrusion, and clamping protrusion, which is equipped with, to be tilted
Face, to facilitate clamping to protrude out into embedding hole 221.Pawl 232 is made of elastic material, such as：Rubber and PVC etc.；Hidden needle guard 220
Inner wall be equipped with the guide groove equal with 232 quantity of pawl, the extending direction phase of the extending direction of guide groove and hidden needle guard 220
Together, four are fallen pawl 232 and are snug fit at correspondingly in four guide grooves, are all provided in each guide groove there are one embedding hole 221,
Multiple embedding holes 221 are located at the same sectional position of hidden needle guard 220.When injection pen is not used, clamping protrusion is located at the upper of embedding hole 221
Square, pawl 232 is in compressive state, and hidden needle guard 220 is moved into injection pen tube 100, and multiple pawls 232 are to hidden needle guard 220
Guiding role is played in movement, the stability of the movement of hidden needle guard 220 is improved, when clamping protrusion is opposite with embedding hole 221, in restoring force
Under effect, clamping protrudes out into embedding hole 221, and under the action of injecting 100 inner wall of pen tube, clamping protrusion is limited in embedding hole 221
Interior, pawl 232 prevents hidden needle guard 220 from further being transported into injection pen tube 100 still in compressive state, multiple pawl 232 cooperations
Dynamic, control syringe needle 320 exposes the length of hidden needle guard 220, to control injection depth；Hidden needle guard 220 drive retaining claw 230 to
100 external movement of pen tube is injected, when embedding hole 221 moves to injection 100 outside of pen tube, under the action of restoring force, clamping protrusion
Embedding hole 221 is stretched out, and is contacted with the end face of injection pen tube 100, prevents hidden needle guard 220 from retracting.
Further, injection mechanism further includes injection spring 330, and needle tubing includes liquid storage tube 311 and push rod 312, is pushed away
One end of bar 312 is located in liquid storage tube 311, the other end runs through the first catch 110, and is slidably matched with the first catch 110；
One end of injection spring 330 is connect with push rod 312, the other end is connect with the first catch 110；First catch 110 deviates from injection
The side of spring 330 is equipped with pre- locking assembly, and pre- locking assembly is for locking or discharging push rod 312, when locking push rod 312, note
Projectile spring 330 makes push rod 312 have to the trend moved close to 320 direction of syringe needle.
Liquid storage tube 311 may be configured as different diameters, and to meet different injection needs, push rod 312 is located at medicine
One end in liquid storage tube 311 is equipped with rubber stopper, and push rod 312 pushes liquid by rubber stopper.When injection, be injected position make it is hidden
Needle guard 220 to injection pen tube 100 in move, syringe needle 320 and be injected location contacts and be pierced into be injected position, pre- locking assembly
Push rod 312 is discharged, under the action of 330 restoring force of injection spring, liquid is pushed to by syringe needle 320 and is injected by push rod 312
Position.
Further, pre- locking assembly includes pre- locking lid 341 and positive stop bead 342, and pre- locking lid 341 is covered on injection pen
One end far from hidden needle guard 220 of pipe 100；There is pre- locking lid 341 cylindrical groove coordinated with push rod 312, push rod 312 can enter
With removal cylindrical groove, the circumferential wall of push rod 312 and cylindrical groove cooperation is equipped with the first limit hole, and the side wall of cylindrical groove is equipped with second and limits
Position hole, the second limit hole run through the side wall of cylindrical groove, and the outer wall of the first guide pin 213 and cylindrical groove is slidably matched, and first is oriented to
Piece 213 is equipped with third limit hole 215；When injection pen is not used, positive stop bead 342 is located at the first limit hole and the second limit hole, with
Injection spring 330 is set to be in compressive state, hidden needle guard 220 pushes hidden 212 movement of needle spring set, third limit hole 215 and second
When limit hole is opposite, positive stop bead 342 enters the second limit hole and third limit hole 215, to discharge push rod 312.
As shown in Figure 1 to Figure 3, the first limit hole there are two being set on push rod 312, the line at the center of two the first limit holes
It is identical as the radial line direction of push rod 312, it is set on the side wall of cylindrical groove there are two the second limit hole, the axis of two the second limit holes
It overlaps, and parallel with the line at the center of two the first limit holes；The close hidden needle spring of two the first guide pins 213 covers 212
End be all provided with there are one third limit hole 215, the axis of two third limit holes 215 overlaps, and with the axis of the second limit hole
Line is parallel.As shown in Figure 1, third limit hole 215 is located at the lower section of the second limit hole, two first guiding before injection pen use
The part that third limit hole 215 is not arranged for piece 213 is opposite with the second limit hole, prevents positive stop bead 342 from being moved from the second limit hole
Go out, positive stop bead 342 is located in the first limit hole and the second limit hole, and limitation push rod 312 moves downward, to make injection spring
330 are in compressive state.
When using injection pen, being injected position makes hidden needle guard 220 be moved into injection pen tube 100, while syringe needle 320 is pierced into
It is injected position, hidden needle guard 220 pushes hidden needle spring set 212 and the first guide pin 213 to be transported to close to the direction of pre- locking lid 341
Dynamic, pawl 232 enters embedding hole 221, and hidden needle spring 211 is compressed, as shown in Fig. 2, third limit hole 215 and the second limit hole phase
Clock synchronization, under the action of the first limit hole side wall, positive stop bead 342 enters the second limit hole and third limit hole 215, automatic to discharge
Push rod 312, under the action of 330 restoring force of injection spring, liquid is pushed to by syringe needle 320 and is injected position by push rod 312,
After the completion of injection, injection pen is removed from position is injected, in the effect of hidden 211 restoring force of needle spring, 220 automatic band of hidden needle guard
Dynamic retaining claw 230 is moved to outside injection pen tube 100, when embedding hole 221 moves to injection 100 outside of pen tube, in the work of restoring force
Under, it is clamped protrusion and stretches out embedding hole 221, and contacted with the end face of injection pen tube 100, prevent hidden needle guard 220 from retracting, and can basis
Whether clamping protrusion contacts with the end face of injection pen tube 100, judges whether injection pen has been used.
Hidden needle protection mechanism coordinates with injection structure, and user need to only make hidden needle guard 220 and be injected location contacts, and press
Press injection pen, in injection pen a series of actions of each component complete automatic injection, and injection pen be injected after position detaches,
Hidden needle guard 220 drives retaining claw 230 to be moved from outside trend injection pen pipe 100, and hidden needle guard 220 is sheathed on again outside syringe needle 320
Portion, also, retaining claw 230 passes through embedding hole 221 to be contacted with the end face for injecting pen tube 100, and hidden needle guard 220 is prevented to be again introduced into note
Penetrate pen tube 100 and keep syringe needle 320 exposed, also, can by retaining claw 230 whether with injection pen tube 100 end face contact, sentence
Whether disconnected injection pen has been used.
In some embodiments, injection spring 330 is sheathed on push rod 312.As shown in Figure 1 to Figure 3,312 periphery of push rod
Lower end be equipped with annular protrusion, the lower end of injection spring 330 contacts with annular protrusion, and upper end is contacted with the first catch 110, first
Catch 110 and annular protrusion cooperation limit hidden needle spring 211.
In other embodiments, push rod 312 is hollow structure, and injection spring 330 is set in push rod 312.Specifically, pushing away
Bar 312 is equipped with cylinder chamber, and lower end closed, injection spring 330 are located in cylinder chamber, and lower end is contacted with the bottom wall of cylinder chamber, column
The side wall of shape chamber is equipped with limiting slot, and limiting slot runs through the side wall of cylinder chamber, and the length direction phase of length direction and push rod 312
Together, the first catch 110 is equipped with limit protrusion, and limit protrusion passes through the upper-end contact of limiting slot and injection spring 330, limit convex
It rises and injection spring 330 is limited with the cooperation of the bottom wall of cylinder chamber.
Further, hidden needle spring set 212 is hollow structure, and push rod 312 covers 212 through hidden needle spring.
As depicted in figs. 1 and 2, push rod 312 and injection spring 330 are by the inside of hidden needle spring set 212, injection spring
330 are sheathed on push rod 312, and the upper end of injection spring 330 is contacted with the first catch 110, lower end and are set to 312 lower end of push rod
Annular protrusion contact, when the upper end of push rod 312 is limited in pre- locking lid 341, injection spring 330 is in compressive state.
Push rod 312 and injection spring 330 are set in hidden needle spring set 212, reduce occupied space, to reduce the volume of injection pen.
Injection pen provided in an embodiment of the present invention is by before use, retaining claw 230 is located in injection pen tube 100, hidden needle guard
220 are sheathed on the outside of syringe needle 320, reduce syringe needle 320 and are damaged；Injection pen is directed at injection site when use, passes through note
It penetrates position and presses hidden needle guard 220, hidden needle guard 220 is moved to the inside of injection pen tube 100, and elastic parts is compressed, and syringe needle 320 pierces
Enter and be injected position, while retaining claw 230 falls into embedding hole 221 and generates elastic force outward, is then injected, injection process
In, retaining claw 230 is located in embedding hole 221, prevents hidden needle guard 220 from being moved relative to needle tubing and syringe needle 320, improves steady when injecting
Qualitative, reduction causes unnecessary injury to user, extracts syringe needle 320 after injection rapidly, is injected position to hidden needle
The active force of set 220 disappears, and under the action of elastic parts restoring force, hidden needle guard 220 drives retaining claw 230 to injection pen tube
100 external movement, hidden needle guard 220 are sheathed on again outside syringe needle 320, also, retaining claw 230 passes through embedding hole 221 and note
The end face contact for penetrating pen tube 100, prevents hidden needle guard 220 to be again introduced into injection pen tube 100 and keep syringe needle 320 exposed, also, can lead to
It crosses whether retaining claw 230 contacts with the end face of injection pen tube 100, judges whether injection pen has been used.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of injection pen, which is characterized in that including：Inject pen tube, hidden needle protection mechanism and injection mechanism, the injection mechanism
Including needle tubing and syringe needle, the needle tubing is set in the injection pen tube, and the syringe needle is installed on one end of the needle tubing, and is located at
Outside the injection pen tube；
The hidden needle protection mechanism includes hidden needle elastic parts, hidden needle guard and retaining claw, and the hidden needle guard is sheathed on the needle
The first end of head, the hidden needle guard is located at outside the injection pen tube, and the second end of the hidden needle guard is located in the injection pen tube
And it is connect with the hidden needle elastic parts；The retaining claw is arranged in institute between the syringe needle and the hidden needle guard
State one end of the installation syringe needle of needle tubing；
The hidden needle guard is equipped with the embedding hole coordinated with the retaining claw, and the side wall of the hidden needle guard is run through in the embedding hole, described
Retaining claw is between the needle tubing and the embedding hole, and the relatively described syringe needle of second end of the hidden needle guard is to the injection pen
In pipe when movement, the hidden needle elastic parts compression, the retaining claw is caught in the embedding hole, the hidden needle elasticity group of compression
Part is for making the hidden needle guard drive the retaining claw dynamic to injection pen tube outward transport.
2. injection pen according to claim 1, which is characterized in that the hidden needle elastic parts includes hidden needle spring and hidden needle
Spring pocket, the injection pen tube is interior to be equipped with the first catch, and the hidden needle spring set has the first guide pin, first guide pin
It is slidably matched across first catch, and with first catch, the hidden needle guard is connected with the hidden needle spring set；
The hidden needle spring between first catch and the hidden needle guard, the hidden needle spring respectively with the first gear
Piece and the hidden needle spring set connection.
3. injection pen according to claim 2, which is characterized in that the hidden needle guard passes through the second guide pin and the hidden needle
Spring pocket connects, and is additionally provided with the second catch in the injection pen tube, second catch be located at the hidden needle spring cover with it is described
Between hidden needle guard, second guide pin passes through second catch, and is slidably matched with second catch.
4. injection pen according to claim 3, which is characterized in that the outer wall fixing sleeve of the hidden needle spring set is equipped with gear
Ring, the baffle ring are connect with the hidden needle spring and second guide pin respectively.
5. injection pen according to claim 1, which is characterized in that the retaining claw include snap ring and it is multiple fall pawl, it is more
It is a it is described fall pawl along the circumferentially-spaced distribution of the snap ring, and be fixedly connected with the snap ring；
The quantity in the embedding hole is equal with the quantity of pawl, and coordinates with multiple one-to-one correspondence of falling pawl.
6. injection pen according to claim 2, which is characterized in that the injection mechanism further includes injection spring, the needle
Pipe includes liquid storage tube and push rod, and one end of the push rod is located in the liquid storage tube, the other end runs through described first
Catch, and be slidably matched with first catch；One end of the injection spring connect with the push rod, the other end and described the
One catch connects；
First catch is equipped with pre- locking assembly away from the side of the injection spring, and the pre- locking assembly is for locking
Or the release push rod, when locking the push rod, the injection spring makes the push rod have to close to syringe needle direction fortune
Dynamic trend.
7. injection pen according to claim 6, which is characterized in that the pre- locking assembly includes pre- locking lid and limit
Pearl, the pre- locking lid are covered on one end far from the hidden needle guard of the injection pen tube；
The pre- locking lid has the cylindrical groove that coordinates with the push rod, the push rod can the into and out cylindrical groove, institute
The circumferential wall for stating push rod and cylindrical groove cooperation is equipped with the first limit hole, and the side wall of the cylindrical groove is equipped with the second limit hole,
Second limit hole runs through the side wall of the cylindrical groove, and the outer wall of first guide pin and the cylindrical groove is slidably matched,
First guide pin is equipped with third limit hole；
When the injection pen is not used, the positive stop bead is located at first limit hole and second limit hole, so that described
Injection spring is in compressive state, and the hidden needle guard pushes the hidden needle spring set movement, the third limit hole and described the
When two limit holes are opposite, the positive stop bead enters second limit hole and the third limit hole, to discharge the push rod.
8. injection pen according to claim 6, which is characterized in that the injection spring is sheathed on the push rod.
9. injection pen according to claim 6, which is characterized in that the push rod is hollow structure, and the injection spring is set
In in the push rod.
10. injection pen according to claim 6, which is characterized in that the hidden needle spring set is hollow structure, the push rod
Through the hidden needle spring set.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498480.7A CN108434556A (en) | 2018-05-23 | 2018-05-23 | Injection pen |
| CN201910229409.3A CN109731184B (en) | 2018-05-23 | 2019-03-25 | Injection pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498480.7A CN108434556A (en) | 2018-05-23 | 2018-05-23 | Injection pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108434556A true CN108434556A (en) | 2018-08-24 |
Family
ID=63204627
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810498480.7A Pending CN108434556A (en) | 2018-05-23 | 2018-05-23 | Injection pen |
| CN201910229409.3A Active CN109731184B (en) | 2018-05-23 | 2019-03-25 | Injection pen |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910229409.3A Active CN109731184B (en) | 2018-05-23 | 2019-03-25 | Injection pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN108434556A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109078242A (en) * | 2018-09-30 | 2018-12-25 | 江苏德尔福医疗器械有限公司 | Injection device for pre-encapsulated injector |
| CN110292683A (en) * | 2019-07-31 | 2019-10-01 | 派格生物医药(苏州)有限公司 | The automatic injection pen of passive triggering device |
| CN111888580A (en) * | 2020-09-10 | 2020-11-06 | 苏州赛卫生物科技有限公司 | Safety syringe |
| WO2021093503A1 (en) * | 2019-11-15 | 2021-05-20 | 苏州嘉树医疗科技有限公司 | Automatic syringe |
| CN113117191A (en) * | 2021-05-13 | 2021-07-16 | 深圳惠迈智能科技有限公司 | Automatic injection pen |
| WO2023185602A1 (en) * | 2022-03-30 | 2023-10-05 | 苏州赛卫生物科技有限公司 | Automatic injection pen |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110269978B (en) * | 2019-05-14 | 2020-07-31 | 江苏德尔福医疗器械有限公司 | Injection pen |
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| RU2155015C1 (en) * | 1999-11-23 | 2000-08-27 | Федеральное государственное унитарное предприятие Конструкторское бюро химавтоматики | Pneumatic injector without needle |
| GB2461088B (en) * | 2008-06-19 | 2012-09-26 | Cilag Gmbh Int | Injection device |
| EP2489390A1 (en) * | 2011-02-18 | 2012-08-22 | Sanofi-Aventis Deutschland GmbH | Detent mechanism |
| WO2013175142A1 (en) * | 2012-05-25 | 2013-11-28 | Aptar France Sas | Autoinjector |
| CN202699778U (en) * | 2012-06-14 | 2013-01-30 | 甘肃成纪生物药业有限公司 | Clamp type full-automatic injection pen |
| WO2014053451A1 (en) * | 2012-10-05 | 2014-04-10 | Carebay Europe Ltd | Medicament delivery device |
| KR20150119092A (en) * | 2013-03-14 | 2015-10-23 | 일라이 릴리 앤드 캄파니 | Delay mechanism suitable for compact automatic injection device |
| EP2883562B1 (en) * | 2013-12-10 | 2016-08-17 | Becton Dickinson and Company | Passive safety pen needle assembly |
| CN106456899B (en) * | 2014-04-04 | 2019-12-03 | 诺和诺德股份有限公司 | Automatic injector with needle housing triggering |
| FR3019749B1 (en) * | 2014-04-11 | 2016-05-13 | Aptar France Sas | autoinjector |
| FR3036966B1 (en) * | 2015-06-05 | 2021-10-01 | Aptar France Sas | AUTOINJECTOR |
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| CN208989904U (en) * | 2018-05-23 | 2019-06-18 | 派格生物医药(苏州)有限公司 | Injection pen |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109078242A (en) * | 2018-09-30 | 2018-12-25 | 江苏德尔福医疗器械有限公司 | Injection device for pre-encapsulated injector |
| CN109078242B (en) * | 2018-09-30 | 2024-05-14 | 江苏德尔福医疗器械有限公司 | Injection device for prefilled syringe |
| CN110292683A (en) * | 2019-07-31 | 2019-10-01 | 派格生物医药(苏州)有限公司 | The automatic injection pen of passive triggering device |
| CN110292683B (en) * | 2019-07-31 | 2023-09-22 | 派格生物医药(苏州)有限公司 | Automatic injection pen with passive trigger |
| WO2021093503A1 (en) * | 2019-11-15 | 2021-05-20 | 苏州嘉树医疗科技有限公司 | Automatic syringe |
| CN111888580A (en) * | 2020-09-10 | 2020-11-06 | 苏州赛卫生物科技有限公司 | Safety syringe |
| CN113117191A (en) * | 2021-05-13 | 2021-07-16 | 深圳惠迈智能科技有限公司 | Automatic injection pen |
| WO2023185602A1 (en) * | 2022-03-30 | 2023-10-05 | 苏州赛卫生物科技有限公司 | Automatic injection pen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109731184A (en) | 2019-05-10 |
| CN109731184B (en) | 2021-06-11 |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180824 |
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