CN109731184A - Injection pen - Google Patents
Injection pen Download PDFInfo
- Publication number
- CN109731184A CN109731184A CN201910229409.3A CN201910229409A CN109731184A CN 109731184 A CN109731184 A CN 109731184A CN 201910229409 A CN201910229409 A CN 201910229409A CN 109731184 A CN109731184 A CN 109731184A
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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 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 cooperated 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 compression, 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 and is difficult to differentiate the technical issues of whether having been used.
Description
Technical field
The present invention relates to the field of medical instrument technology, more particularly, to a kind of injection pen.
Background technique
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, which 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, is easily damaged injection needle, and part is infused
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.
Summary of the invention
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: injection 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 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 cooperated 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 the 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.
Further, the hidden needle elastic parts includes hidden needle spring and hidden needle spring set, is equipped in the injection pen tube
First flap, the hidden needle spring set have the first guide pin, and first guide pin passes through the first flap, and with it is described
First flap is slidably matched, and the hidden needle guard and the hidden needle spring set connect；
The hidden needle spring between the first flap and the hidden needle guard, the hidden needle spring respectively with the first gear
Piece 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 second flap, the second flap is located between the hidden needle spring set and the hidden needle guard, second guide pin
It is slidably matched across the second flap, and with the second flap.
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 cooperates with multiple one-to-one correspondence of falling pawl.
Further, the injection mechanism further includes injection spring, and the needle tubing includes medical fluid storage tube and push rod, described
One end of push rod is located in the medical fluid storage tube, the other end is through the first flap, and matches with first flap sliding
It closes；One end of the injection spring is connect with the push rod, the other end is connect with the first flap；
The side away from the injection spring of the first flap is equipped with pre- locking assembly, and the pre- locking assembly is for locking
Or the release push rod, when locking the push rod, the injection spring has the push rod to close to syringe needle direction fortune
Dynamic trend.
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 that cooperates 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.
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
The inside movement to injection pen tube is covered, 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 mobile with syringe needle, stability when injection is improved, reduction causes unnecessary injury to user, extracts 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.
Detailed description of the invention
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 needed in embodiment or description of Related Art is briefly described, it should be apparent that, it is 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, is also possible to obtain other drawings based on these drawings.
Cross-sectional view when Fig. 1 is the first state of injection pen provided in an embodiment of the present invention；
Cross-sectional view when Fig. 2 is the second state of injection pen provided in an embodiment of the present invention；
Cross-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；110- first flap；120- second flap；The hidden needle spring of 211-；The hidden needle spring of 212-
Set；The first guide pin of 213-；214- baffle ring；215- third limit hole；The hidden needle guard of 220-；The embedding hole 221-；The second guide pin of 222-；
230- retaining claw；231- snap ring；232- falls pawl；311- medical fluid storage tube；312- push rod；320- syringe needle；330- injection spring；
The pre- locking lid of 341-；342- positive stop bead.
Specific embodiment
Technical solution 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
Personnel's every other embodiment 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 description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting 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
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
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: injection 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 be located 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 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 cooperated 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 moving to syringe needle 320 into injection pen tube 100, 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 move 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 by way of clamping with the second pen tube,
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 flap 110, hidden needle spring set 212 have the first guide pin 213, and the first guide pin 213 passes through first flap 110, and with
First flap 110 is slidably matched, and hidden needle guard 220 is connect with hidden needle spring set 212；Hidden needle spring 211 be located at first flap 110 with
Between hidden needle guard 220, hidden needle spring 211 is connect with first flap 110 and hidden needle spring set 212 respectively.
As shown in Figure 1 to Figure 3, first flap 110 is fixedly connected on the end far from hidden needle guard 220 in injection pen tube 100,
The end face opposite with first flap 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 baffle 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 first flap 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 first flap 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
Stabilization when the hidden compression of 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 second flap 120, second flap 120 is located between hidden needle spring set 212 and hidden needle guard 220, and the second guide pin 222 is worn
Second flap 120 is crossed, and is slidably matched with second flap 120.
Specifically, second flap 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, setting 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 in second flap 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 second flap 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 and the injection cooperation of pen tube 100 play guiding role 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 power transmitting, 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, which is located at two second, is led
To between piece 222, on two the second guide pins 222 end face opposite with baffle ring 214, equipped with the groove cooperated with baffle ring 214, keep off
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 first flap 110, the lower end surface of hidden needle spring 211 and baffle ring 214
End face contact, baffle ring 214 and first flap 110 cooperation position-limiting action is played 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 are fallen pawl 232 and are uniformly distributed along the circumferential direction of snap ring 231, and with snap ring 231 is fixed connects
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 is equipped with inclination
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 fall pawl 232 be snug fit in four guide grooves correspondingly, an embedding hole 221 is equipped in each guide groove,
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
Side, 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 that hidden needle guard 220 moves 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 transporting 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 medical fluid storage tube 311 and push rod 312, is pushed away
One end of bar 312 is located in medical fluid storage tube 311, the other end is slidably matched through first flap 110 with first flap 110；
One end of injection spring 330 is connect with push rod 312, the other end and first flap 110 connect；First flap 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 has push rod 312 to the trend moved close to 320 direction of syringe needle.
Medical fluid 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 medical fluid 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, medical fluid 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；Pre- locking lid 341 has the cylindrical groove cooperated with push rod 312, and 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, the first guiding
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 is overlapped, and parallel with the line at the center of two the first limit holes；The close hidden needle spring set 212 of two the first guide pins 213
End be equipped with a third limit hole 215, the axis of two third limit holes 215 is overlapped, and the axis with 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 of the not set third limit hole 215 of piece 213 is opposite with the second limit hole, prevents positive stop bead 342 from moving from the second limit hole
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 moves hidden needle guard 220 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 transport to the direction close to 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, medical fluid 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, the automatic band of hidden needle guard 220
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 and injection structure cooperate, and user need to only make hidden needle guard 220 and be injected location contacts, and press
Press injection pen, automatic injection is completed in a series of actions of each component in injection pen, and injection pen be injected after position separates,
Hidden needle guard 220 drives retaining claw 230 to move 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 and contacts 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 first flap 110, first
Baffle 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, first flap 110 is equipped with retention bead, and retention bead 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 is through hidden needle spring set 212.
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 first flap 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, the inside of hidden needle guard 220 to injection pen tube 100 is mobile, 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 mobile 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
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, 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 characterized by comprising injection 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, the hidden needle guard set
Set on the syringe needle, 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 described
It is connect in injection pen tube and with the hidden needle elastic parts；The retaining claw between the syringe needle and the hidden needle guard,
And it is arranged in one end of the installation syringe needle of the needle tubing；The hidden needle guard is equipped with the embedding hole cooperated with the retaining claw,
The side wall of the hidden needle guard is run through in the embedding hole, and the retaining claw is between the needle tubing and the embedding hole, the hidden needle
When the relatively described syringe needle of the second end of set is moved into the injection pen tube, the hidden needle elastic parts compression, the locking card
Pawl is caught in the embedding hole, and the hidden needle elastic parts of compression is for making the hidden needle guard drive the retaining claw to the note
It penetrates outside pen tube and moves.
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 first flap, and the hidden needle spring set has the first guide pin, first guide pin
It is slidably matched across the first flap, and with the first flap, the hidden needle guard and the hidden needle spring set connect；
The hidden needle spring between the first flap 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 connection, is additionally provided with second flap in the injection pen tube, the second flap be located at the hidden needle spring cover with it is described
Between hidden needle guard, second guide pin passes through the second flap, and is slidably matched with the second flap.
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 and institute
The quantity for stating down pawl is equal, and cooperates 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 medical fluid storage tube and push rod, and one end of the push rod is located in the medical fluid storage tube, the other end is through described first
Baffle, and be slidably matched with the first flap；One end of the injection spring connect with the push rod, the other end and described the
The connection of one baffle；The side away from the injection spring of the first flap is equipped with pre- locking assembly, the pre- locking assembly
For locking or discharging the push rod, when locking the push rod, the injection spring has the push rod to close to the needle
The trend of head direction movement.
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 and institute
The cylindrical groove of push rod cooperation is stated, the push rod can the into and out cylindrical groove, the push rod and cylindrical groove cooperation
Circumferential wall is equipped with the first limit hole, and the side wall of the cylindrical groove is equipped with the second limit hole, and second limit hole runs through the column
The outer wall of the side wall of shape slot, first guide pin and the cylindrical groove is slidably matched, and first guide pin is limited equipped with third
Position 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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498480.7A CN108434556A (en) | 2018-05-23 | 2018-05-23 | Injection pen |
| CN2018104984807 | 2018-05-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109731184A true CN109731184A (en) | 2019-05-10 |
| CN109731184B CN109731184B (en) | 2021-06-11 |
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 Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810498480.7A Pending CN108434556A (en) | 2018-05-23 | 2018-05-23 | Injection pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN108434556A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110269978A (en) * | 2019-05-14 | 2019-09-24 | 江苏德尔福医疗器械有限公司 | Injection pen |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN110681004A (en) * | 2019-11-15 | 2020-01-14 | 苏州嘉树医疗科技有限公司 | Automatic injector |
| CN111888580B (en) * | 2020-09-10 | 2022-03-01 | 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 |
| CN219558328U (en) * | 2022-03-30 | 2023-08-22 | 苏州赛卫生物科技有限公司 | Locking excitation mechanism and automatic injection pen thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109731184B (en) | 2021-06-11 |
| CN108434556A (en) | 2018-08-24 |
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