CN212067367U - Injection device - Google Patents
Injection device Download PDFInfo
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- CN212067367U CN212067367U CN201922382546.9U CN201922382546U CN212067367U CN 212067367 U CN212067367 U CN 212067367U CN 201922382546 U CN201922382546 U CN 201922382546U CN 212067367 U CN212067367 U CN 212067367U
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- ring
- push rod
- sleeve
- injection
- face gear
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- 238000002347 injection Methods 0.000 title claims abstract description 207
- 239000007924 injection Substances 0.000 title claims abstract description 207
- 239000003814 drug Substances 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims abstract description 50
- 238000003825 pressing Methods 0.000 claims description 16
- 230000004323 axial length Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 3
- 239000008280 blood Substances 0.000 description 3
- 210000004369 blood Anatomy 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000008103 glucose Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 102000004877 Insulin Human genes 0.000 description 2
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- 238000007906 compression Methods 0.000 description 2
- 206010012601 diabetes mellitus Diseases 0.000 description 2
- 229940125396 insulin Drugs 0.000 description 2
- 239000003472 antidiabetic agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229940126904 hypoglycaemic agent Drugs 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses an injection device, include: a housing; the scale ring is spirally lifted relative to the shell; the injection button applies axial injection thrust, and the lower end of the injection button is connected with the upper end of the scale ring; a push rod for pushing the piston of the medicine bottle to move; a transmission member that transmits an injection thrust of the injection button to the push rod; the transmission part comprises a rotary ring, a driving sleeve and a push rod sleeve; the rotary ring is linked with the injection button in the circumferential direction; a first end face gear ring is arranged on the end face of one end, opposite to the rotary ring, of the driving sleeve, a second end face gear ring matched with the first end face gear ring is arranged on the end face of the lower end of the rotary ring, and the driving sleeve is linked with the push rod in the circumferential direction; the push rod sleeve is sleeved on the push rod, the push rod sleeve is provided with a first internal thread, and the push rod is provided with a first external thread matched with the first internal thread. The utility model discloses an injection device, control injection dosage that can be better.
Description
Technical Field
The utility model relates to the field of medical equipment, concretely relates to injection device.
Background
For diabetics, their blood glucose levels are important, requiring regular attention and recording, and in order to reduce fluctuations in their blood glucose levels, drug management is required. Artificial insulin is a well-known hypoglycemic agent which must be administered parenterally in order to function in the human body. Currently, the most common way of administering artificial insulin to diabetic patients is by subcutaneous injection; hypodermic injection mostly uses disposable or fixed dose syringes, but the patient has inconvenience in use because the dose to be injected depends on his blood glucose index.
Although injection devices capable of dose adjustment are also currently on the market, there is the problem that the dose control is not accurate enough.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present invention are directed to an injection device capable of better controlling the injection dosage.
In order to achieve the above object, the embodiment of the present invention provides a technical solution that:
an embodiment of the utility model provides an injection device, injection device includes:
a housing; one end of the shell is an injection end connected with the medicine bottle, and the other end of the shell is an adjusting end for adjusting the dosage;
the scale ring is spirally lifted relative to the shell; the scale ring is positioned at the adjusting end of the shell, and the scale ring and the shell are both provided with corresponding thread structures;
an injection button exerting an axial injection thrust; the injection button is positioned at the adjusting end of the shell, and the lower end of the injection button is connected with the upper end of the scale ring; the scale ring spirally descends along a first circumferential direction along with the axial injection thrust of the injection button, and the injection button spirally descends along with the spiral descending of the scale ring;
a push rod for pushing the piston of the medicine bottle to move; the push rod is positioned in the shell and extends along the axial direction of the shell; the push rod comprises a pushing end connected with the medicine bottle and a stressed end connected with the injection button, and the pushing end of the push rod extends out of the injection end of the shell;
a transmission member that transmits an injection thrust of the injection button to the push rod; the transmission part comprises a rotary ring, a driving sleeve and a push rod sleeve;
the rotary ring is positioned below the injection button and is linked with the injection button in the circumferential direction;
the driving sleeve is positioned below the rotary ring, a first end face gear ring is arranged on one end face of the driving sleeve opposite to the rotary ring, the first end face gear ring is a one-way end face gear ring which only transmits torque in a first circumferential direction and has a triangular tooth shape, a second end face gear ring matched with the first end face gear ring is arranged on the lower end face of the rotary ring, and the driving sleeve rotates along with the rotation of the rotary ring in the first circumferential direction; the driving sleeve is sleeved on the push rod and is linked with the push rod in the circumferential direction;
the push rod sleeve is positioned below the driving sleeve and is fixed in position; the push rod sleeve is sleeved on the push rod, the push rod sleeve is provided with a first internal thread, and the push rod is provided with a first external thread matched with the first internal thread.
In the above scheme, the upper end of the scale ring is provided with a third end face gear ring, the third end face gear ring is a one-way end face gear ring which only transmits a second circumferential torque and has a triangular tooth shape, and the lower end of the injection button is provided with a fourth end face gear ring matched with the third end face gear ring; when the scale ring rotates along the second circumferential direction, the injection button rotates along with the rotation of the scale ring.
In the scheme, the slewing rings comprise a first slewing ring, a second slewing ring and a third slewing ring, and the first slewing ring, the second slewing ring and the third slewing ring are sequentially nested in the axial direction, can mutually extend and retract in the axial direction and are linked in the circumferential direction; the second end face gear ring is arranged on the lower end face of the first rotary ring, and the upper end of the third rotary ring is connected to the lower end of the injection button; and a first elastic part and a second elastic part for increasing the total axial length are arranged among the first revolving ring, the second revolving ring and the third revolving ring.
In the above scheme, the injection button comprises a pressing cap and an injection force transmission sleeve which are connected with each other, and the injection force transmission sleeve and the pressing cap can rotate relatively; the lower end of the injection force transmission sleeve is provided with the fourth end face gear ring, and the injection force transmission sleeve is connected with the upper end of the third rotary ring.
In the above scheme, the housing comprises an outer cylinder and an inner cylinder which are fixed to each other, the outer cylinder and the inner cylinder are provided with a preset gap at a radial interval, and the scale ring is rotatably arranged between the outer cylinder and the inner cylinder; a second internal thread is arranged on the inner wall of the scale ring, and a second external thread matched with the second internal thread is arranged on the outer circle of the inner cylinder; the outer barrel is provided with a reading window corresponding to the scale ring.
In the above scheme, the injection device further comprises a support sleeve for supporting the transmission component, the support sleeve is sleeved on the push rod and is positioned between the drive sleeve and the push rod sleeve; the upper end face of the support sleeve is provided with a fifth end face gear ring, the fifth end face gear ring is a one-way end face gear ring which only transmits torque in a second circumferential direction and has a triangular tooth shape, and the lower end face of the drive sleeve is provided with a sixth end face gear ring matched with the fifth end face gear ring; the support sleeve is fixed on the shell.
In the above scheme, the injection device further comprises a push rod head, the push rod head is connected to the pushing end of the push rod, and the push rod head and the push rod can rotate relatively.
In the above scheme, the injection device further comprises a third elastic part for fixing the axial position of the medicine bottle, one end of the third elastic part abuts against the support sleeve, the other end of the third elastic part abuts against the push rod sleeve, and the push rod sleeve is pushed to compress the medicine bottle from the axial direction.
In the above scheme, the upper end of the scale ring is fixed with an upper cover which is arranged above the injection force transmission sleeve; a connecting shaft is fixed at the bottom of the pressing cap, penetrates through the upper cover and is connected to the injection force transmission sleeve; the injection device further comprises a fourth elastic part for maintaining the third end face gear ring and the fourth end face gear ring to be meshed, one end of the fourth elastic part abuts against the upper end of the injection force transmission sleeve, and the other end of the fourth elastic part abuts against the bottom end of the upper cover.
In the above scheme, the injection device further comprises a limiting sleeve for limiting the circumferential position of the push rod sleeve, and the limiting sleeve is fixed at the injection end of the shell; the limit sleeve is sleeved at the lower end of the push rod sleeve, the inner wall of the limit sleeve is provided with ribs extending axially, and the outer wall of one end of the push rod sleeve is provided with axial grooves corresponding to the ribs.
The utility model discloses injection device, include: a housing; the scale ring is spirally lifted relative to the shell; the injection button applies axial injection thrust, and the lower end of the injection button is connected with the upper end of the scale ring; a push rod for pushing the piston of the medicine bottle to move; a transmission member that transmits an injection thrust of the injection button to the push rod; the transmission part comprises a rotary ring, a driving sleeve and a push rod sleeve; the rotary ring is linked with the injection button in the circumferential direction; a first end face gear ring is arranged on the end face of one end, opposite to the rotary ring, of the driving sleeve, a second end face gear ring matched with the first end face gear ring is arranged on the end face of the lower end of the rotary ring, and the driving sleeve is linked with the push rod in the circumferential direction; the push rod sleeve is sleeved on the push rod and provided with a first internal thread, and the push rod is provided with a first external thread matched with the first internal thread; it can be seen that the utility model discloses injection device is triangle-shaped's terminal surface ring gear transmission moment of torsion through the profile of tooth, can accurate transmission moment of torsion, and the control that can be better injects the dose.
Other beneficial effects of the embodiment of the present invention will be further explained in conjunction with the specific technical solution in the detailed description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It should be understood that the drawings described below are only a part of the drawings of the embodiments of the present invention, and that other drawings may be obtained by those skilled in the art without inventive effort.
Fig. 1 is a schematic view of an injection device provided by an embodiment of the present invention;
FIG. 2 is a perspective view of FIG. 1;
FIG. 3 is a first cross-sectional view (initial state) of FIG. 1;
FIG. 4 is a second cross-sectional view (in a scaled state) of FIG. 1;
FIG. 5 is a third schematic sectional view of FIG. 1 (injection complete state);
FIG. 6 is a schematic view of FIG. 3 with the protective cap, drug cartridge and drug vial removed;
fig. 7 is a schematic view of an injection device according to an embodiment of the present invention, in which a push rod, a support sleeve, a driving sleeve, a rotary ring, and an injection force-transmitting sleeve are assembled together;
fig. 8 is a schematic view of a scale ring in an injection device according to an embodiment of the present invention;
fig. 9 is a schematic view of a pressing cap in an injection device according to an embodiment of the present invention;
fig. 10 is a schematic view of an injection force transmitting sleeve in an injection device according to an embodiment of the present invention;
fig. 11 is a schematic view of an outer cylinder in an injection device according to an embodiment of the present invention;
fig. 12 is a schematic view of an inner barrel of an injection device according to an embodiment of the present invention;
fig. 13 is a schematic view of a push rod sleeve in an injection device according to an embodiment of the present invention;
fig. 14 is a schematic view of a medicine cartridge in an injection device according to an embodiment of the present invention;
fig. 15 is a schematic view of a vial in an injection device according to an embodiment of the present invention;
fig. 16 is a schematic view of a protective cap in an injection device according to an embodiment of the present invention.
Detailed Description
An embodiment of the utility model provides an injection device, injection device includes:
a housing; one end of the shell is an injection end connected with the medicine bottle, and the other end of the shell is an adjusting end for adjusting the dosage;
the scale ring is spirally lifted relative to the shell; the scale ring is positioned at the adjusting end of the shell, and the scale ring and the shell are both provided with corresponding thread structures;
an injection button exerting an axial injection thrust; the injection button is positioned at the adjusting end of the shell, and the lower end of the injection button is connected with the upper end of the scale ring; the scale ring spirally descends along a first circumferential direction along with the axial injection thrust of the injection button, and the injection button spirally descends along with the spiral descending of the scale ring;
a push rod for pushing the piston of the medicine bottle to move; the push rod is positioned in the shell and extends along the axial direction of the shell; the push rod comprises a pushing end connected with the medicine bottle and a stressed end connected with the injection button, and the pushing end of the push rod extends out of the injection end of the shell;
a transmission member that transmits an injection thrust of the injection button to the push rod; the transmission part comprises a rotary ring, a driving sleeve and a push rod sleeve;
the rotary ring is positioned below the injection button and is linked with the injection button in the circumferential direction;
the driving sleeve is positioned below the rotary ring, a first end face gear ring is arranged on one end face of the driving sleeve opposite to the rotary ring, the first end face gear ring is a one-way end face gear ring which only transmits torque in a first circumferential direction and has a triangular tooth shape, a second end face gear ring matched with the first end face gear ring is arranged on the lower end face of the rotary ring, and the driving sleeve rotates along with the rotation of the rotary ring in the first circumferential direction; the driving sleeve is sleeved on the push rod and is linked with the push rod in the circumferential direction;
the push rod sleeve is positioned below the driving sleeve and is fixed in position; the push rod sleeve is sleeved on the push rod, the push rod sleeve is provided with a first internal thread, and the push rod is provided with a first external thread matched with the first internal thread.
Here, the medicine bottle refers to a bottle loaded with liquid medicine, and is generally fixed in the injection device through a medicine bin, and one end of the medicine bottle facing the injection device is provided with a piston connected with a push rod, and the other end can be connected with a needle.
Here, the circumferential direction linkage means that one side rotates and the other side inevitably rotates, and the circumferential direction linkage in the embodiment of the present invention is coaxial, and therefore the rotation directions are also the same.
Here, the tooth profiles of the first end face gear ring and the second end face gear ring are triangular, so that the advantage of higher precision is achieved.
And the utility model discloses the meshing motion between first terminal surface ring gear and the second terminal surface ring gear all is low-speed motion, consequently need not to adopt transmission efficiency height, the steady involute profile of tooth or other profile of tooth of atress.
The utility model discloses injection device is triangle-shaped's terminal surface ring gear transmission moment of torsion through the profile of tooth, can accurate transmission moment of torsion, and the control that can be better injects the dose.
The utility model discloses the working process is including installation medicine bottle, adjustment dose, injection and reseing, and specific theory of operation is as follows:
1) installing the medicine bottle, wherein the medicine bottle can be split, namely, the medicine bin is required to be installed firstly, then the medicine bottle is installed, the medicine bottle is discarded after the injection, and the medicine bin can be recycled; or the medicine storage and the medicine bottle are integrated, namely the medicine storage and the medicine bottle are directly installed, and the medicine storage and the medicine bottle are directly discarded after injection, and are disposable.
2) The dose is adjusted, the scale ring is rotated, and the scale ring rises spirally relative to the shell, namely, the distance between the lower end of the scale ring and the shell in the rising process is increased in the axial direction, and the increased distance determines the moving distance of the pushing end of the follow-up push rod, so that the dose is determined. And the set value of the dosage can be observed by arranging the scales which are uniformly distributed on the outer wall of the scale ring or the outer wall of the shell. The scale ring can only be raised and not lowered until the scale ring has not adjusted the dose, at which point the scale shows a "0".
3) And in the injection step, the injection button is pressed, and the injection button is connected with the scale ring and can apply axial thrust to the scale ring, and the scale ring spirally descends along the first circumferential direction along with the axial injection thrust of the injection button. Also, since the injection button is connected to the scale ring, the injection button will screw down as the scale ring is screwed down.
The swivel ring rotates due to the circumferential linkage with the injection button. The slewing ring drives the driving sleeve to rotate through the first end face gear ring and the second end face gear ring. The driving sleeve is linked with the push rod in the circumferential direction, and the push rod also rotates. Because the push rod and the push rod sleeve are connected through the first internal thread and the first external thread, and the axial position of the push rod sleeve is fixed, the push rod can spirally descend in the rotation process, and moves towards the injection end of the shell, so that the piston of the medicine bottle is extruded, and the injection is completed.
Note that: to ensure that most vials on the market are ready for injection, the push rod needs to be designed long enough.
4) Resetting, and disassembling the medicine bin after the medicine in the medicine bottle is injected. The push rod is pushed upwards by applying force axially from the push end of the push rod, and the push rod can spirally rise until the push rod returns to the initial position due to the fact that the push rod and the push rod sleeve are connected through the first internal thread and the first external thread.
Note that: if the medicine in the medicine bottle is not injected, the medicine bin cannot be disassembled, the axial position of the push rod cannot retreat, and otherwise, the accuracy of the dosage can be influenced.
The embodiment of the present invention is mainly used for injecting liquid medicine for diabetic patients or other patients, but those skilled in the art can understand that the present invention can also be used for injecting or pushing other liquid or fluid products, and the details are not repeated herein.
In other embodiments of the present invention, the upper end of the scale ring may be provided with a third end face gear ring, the third end face gear ring is a one-way end face gear ring which only transmits the second circumferential torque and has a triangular tooth shape, and the lower end of the injection button is provided with a fourth end face gear ring which is matched with the third end face gear ring; when the scale ring rotates along the second circumferential direction, the injection button rotates along with the rotation of the scale ring.
Therefore, when the dosage is adjusted, the scale ring rotates along the second circumferential direction, and the third end face gear ring and the fourth end face gear ring drive the injection button to rotate. The injection button rotates to drive the rotary ring to rotate. Because the first end face gear ring is the unidirectional end face gear ring which only transmits the torque in the first circumferential direction, the rotary ring rotates in the second circumferential direction, the first end face gear ring cannot rotate, and the second end face gear ring rotates and can circumferentially slide with the first end face gear ring, and the rotary ring is similar to a ratchet wheel, so that the clicking and clicking friction sound can be generated, a user can conveniently sense the dosage, and the rotary ring is a better implementation mode. It can be understood that it is also possible not to provide the third end face gear ring and the fourth end face gear ring, so that only the scale ring rotates when the dosage is adjusted, and the scale ring does not rotate, and the use is not affected except that the user cannot hear the click sound.
In other embodiments of the present invention, the revolving rings may include a first revolving ring, a second revolving ring and a third revolving ring, the first revolving ring, the second revolving ring and the third revolving ring are sequentially nested in the axial direction and can mutually extend and contract in the axial direction, and are linked in the circumferential direction; the second end face gear ring is arranged on the lower end face of the first rotary ring, and the upper end of the third rotary ring is connected to the lower end of the injection button; and a first elastic part and a second elastic part for increasing the total axial length are arranged among the first revolving ring, the second revolving ring and the third revolving ring.
Here, through designing three swivel rings to nest axially and can stretch out and draw back each other, be similar to the flexible pipe promptly, can guarantee sufficient total length when adjusting the dosage, make the swivel ring contact injection button all the time, also can be when injecting, reduce the total length, guarantee that scale ring and injection button descend in proper order, be the better implementation mode. It will be appreciated that it is also possible to provide only one swivel ring, as long as the design is such that the swivel ring is always in contact with the injection button, for example by providing a long key with a long axial length at the bottom of the injection button, said swivel ring being provided with a key slot on the outer side wall into which the long key extends, said long key being axially displaceable in the key slot during dose setting without leaving said key slot, and the long key and the key slot also enabling the coupling of the swivel ring and the injection button in the circumferential direction.
In other embodiments of the present invention, the injection button may include a pressing cap and an injection force-transmitting sleeve connected to each other, and the injection force-transmitting sleeve and the pressing cap may rotate relative to each other; the lower end of the injection force transmission sleeve is provided with the fourth end face gear ring, and the injection force transmission sleeve is connected with the upper end of the third rotary ring. Therefore, when the scale ring drives the injection button to rotate, the pressing cap can not rotate, so that a user can apply axial force conveniently, and the injection device is a better implementation mode. Of course, there are many ways to prevent the pressing cap from rotating, and detailed description thereof will be omitted.
In other embodiments of the present invention, the housing may include an outer cylinder and an inner cylinder fixed to each other, the outer cylinder and the inner cylinder are spaced at a predetermined gap in a radial direction, and the scale ring is rotatably disposed between the outer cylinder and the inner cylinder; a second internal thread is arranged on the inner wall of the scale ring, and a second external thread matched with the second internal thread is arranged on the outer circle of the inner cylinder; the outer barrel is provided with a reading window corresponding to the scale ring. In this way, the following beneficial effects can be produced:
firstly, the scale ring is arranged between the outer cylinder and the inner cylinder, so that the rotation of the scale ring is more stable;
secondly, the inner cylinder can surround parts such as a rotary ring, a driving sleeve and the like, so that the whole injection device is more compact and firm in structure;
and thirdly, the inner cylinder and the outer cylinder can be assembled after being manufactured respectively, wherein the outer cylinder can be made of metal materials, the appearance is more attractive, the inner cylinder can be made of plastic materials, and the cost is lower.
Therefore, this embodiment is more preferable. It can be understood that the scale ring is not divided into the outer cylinder and the inner cylinder, for example, the inner cylinder is not provided, but the inner wall of the outer cylinder is provided with an internal thread, the outer wall of the scale ring is provided with an external thread, and the spiral lifting of the scale ring can also be realized.
In other embodiments of the present invention, the injection device may further include a support sleeve supporting the transmission member, the support sleeve being disposed on the push rod and located between the driving sleeve and the push rod sleeve; the upper end face of the support sleeve is provided with a fifth end face gear ring, the fifth end face gear ring is a one-way end face gear ring which only transmits torque in a second circumferential direction and has a triangular tooth shape, and the lower end face of the drive sleeve is provided with a sixth end face gear ring matched with the fifth end face gear ring; the support sleeve is fixed on the shell. Thus, the axial position of the driving sleeve is relatively stable, which is a preferred embodiment. In addition, in the injection, the fifth end face gear ring does not rotate, and the sixth end face gear ring rotates along with the driving sleeve, so that the sixth end face gear ring and the first end face gear ring can slide in the circumferential direction, and rattling friction sounds are generated, so that a user can conveniently sense the injection, and the injection device is a better implementation mode.
In other embodiments of the present invention, the injection device may further comprise a pusher head connected to the pushing end of the pusher, the pusher head and the pusher being capable of relative rotation therebetween. Thus, when the push rod is spirally descended, the push rod does not generate friction force for rotating the piston of the medicine bottle, and the medicine bottle is a better embodiment.
In other embodiments of the present invention, the injection device may further include a third elastic part for fixing the axial position of the medicine bottle, wherein one end of the third elastic part is supported against the supporting sleeve, and the other end of the third elastic part is supported against the pushing rod sleeve, and pushes the pushing rod sleeve to compress the medicine bottle from the axial direction. In this way, it is preferable to be able to cope with the length error in manufacturing of the medicine bottles of different sizes or the medicine bottles of the same size, and to fix the axial position of the push rod sleeve.
In other embodiments of the present invention, an upper cover may be fixed to an upper end of the scale ring, and the upper cover is above the injection force-transmitting sleeve; a connecting shaft is fixed at the bottom of the pressing cap, penetrates through the upper cover and is connected to the injection force transmission sleeve; the injection device further comprises a fourth elastic part for maintaining the third end face gear ring and the fourth end face gear ring to be meshed, one end of the fourth elastic part abuts against the upper end of the injection force transmission sleeve, and the other end of the fourth elastic part abuts against the bottom end of the upper cover. In this way, the third end face gear ring and the fourth end face gear ring can be tightly meshed all the time, and the preferred embodiment is realized.
In other embodiments of the present invention, the injection device may further include a limiting sleeve for limiting the circumferential position of the push rod sleeve, and the limiting sleeve is fixed to the injection end of the housing; the limit sleeve is sleeved at the lower end of the push rod sleeve, the inner wall of the limit sleeve is provided with ribs extending axially, and the outer wall of one end of the push rod sleeve is provided with axial grooves corresponding to the ribs. The circumferential position of the push rod sleeve is limited through the limiting sleeve instead of being limited through the shell directly, the manufacturing difficulty of the shell can be simplified, and the cost is reduced.
Generally speaking, the utility model discloses injection device compares current product, and the structure is simpler, and the manufacturing of each part is easier, the assembly is more convenient, the control injection dosage that can be better.
For a better understanding of the present invention, the following detailed description is given in conjunction with the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Also, the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained without inventive effort by a person skilled in the art according to the embodiments, are within the scope of the present invention.
For simplicity of presentation, the injection device and its components are described in the orientation shown in fig. 1, i.e. both above and below refer to the top and bottom in fig. 1.
As shown in fig. 1-7, embodiments of the present invention provide an injection device that includes a housing, a scale ring 200, an injection button, a push rod 400, and a transmission member.
The scale ring 200 is used to indicate the injected dose. The scale ring 200 can be spirally lifted relative to the housing.
The injection button is used for applying axial injection thrust.
The push rod 400 is used for pushing the piston 7011 of the medicine bottle 701 to move.
The transmission part is used for transmitting the injection thrust of the injection button to the push rod 400. The transmission means comprise a swivel ring, a drive sleeve 504 and a push rod sleeve 505.
The rotary ring is linked with the injection button in the circumferential direction.
The end face of the driving sleeve 504 opposite to the revolving ring is provided with a first end face gear ring 5041. The first end face ring 5041 is a one-way end face ring which only transmits torque in the first circumferential direction and has a triangular tooth shape. The lower end face of the slewing ring is provided with a second end face gear ring 5011 matched with the first end face gear ring 5041. The drive sleeve 504 rotates with rotation of the slew ring in a first circumferential direction. The driving sleeve 504 is sleeved on the push rod 400, and the driving sleeve 504 is linked with the push rod 400 in the circumferential direction. In this embodiment, the first circumferential direction is a counterclockwise direction, and the other direction, that is, the second circumferential direction described below is a clockwise direction.
The position of the push rod cover 505 is fixed by a housing or other component. The push rod sleeve 505 is sleeved on the push rod 400, the push rod sleeve 505 is provided with a first internal thread 5051 (see fig. 13), and the push rod 400 is provided with a first external thread 401 matched with the first internal thread 5051.
Specifically, the tooth shape of the first end face ring 5041 is a right triangle, wherein a right-angled side is a side for transmitting circumferential torque. Because of the mating relationship, the tooth profile of the second face gear 5011 is the same as the tooth profile of the first face gear 5041, as follows.
The first internal thread 5051 and the first external thread 401 are both drive threads, more specifically trapezoidal threads.
As shown in fig. 8, a third end face gear ring 201 is arranged at the upper end of the scale ring 200, the third end face gear ring 201 is a unidirectional end face gear ring which only transmits torque in the second circumferential direction and has a triangular tooth shape, and a fourth end face gear ring 3021 which is matched with the third end face gear ring 201 is arranged at the lower end of the injection button; when the scale ring 200 rotates in the second circumferential direction, the injection button rotates along with the rotation of the scale ring 200. The third face ring 201 has the same tooth profile as the first face ring 5041, but transmits torque in the opposite direction.
The rotating rings comprise a first rotating ring 501, a second rotating ring 502 and a third rotating ring 503, wherein the first rotating ring 501, the second rotating ring 502 and the third rotating ring 503 are sequentially nested in the axial direction and can mutually extend and retract in the axial direction, and the first rotating ring 501, the second rotating ring 502 and the third rotating ring 503 are linked in the circumferential direction. Specifically, the second rotating ring 502 is sleeved on the outer wall of the first rotating ring 501, and the third rotating ring 503 is sleeved on the outer wall of the second rotating ring 502. The lower end face of the first rotary ring 501 is provided with the second end face gear ring 5011, and the upper end of the third rotary ring 503 is connected to the lower end of the injection button; a first elastic part 506 and a second elastic part 507 which increase the total axial length are arranged among the first revolving ring 501, the second revolving ring 502 and the third revolving ring 503.
Specifically, the circumferential direction linkage of the first revolving ring 501, the second revolving ring 502 and the third revolving ring 503 can be realized by the assembling relationship of the key and the key groove.
In particular, the first and second elastic parts 506 and 507 are cylindrical compression springs.
As shown in fig. 9 and 10, the injection button comprises a pressing cap 301 and an injection force transmission sleeve 302 which are connected with each other, and the injection force transmission sleeve 302 and the pressing cap 301 can rotate relatively; the fourth end face gear ring 3021 is provided at the lower end of the injection force transmission sleeve 302, and the injection force transmission sleeve 302 is connected to the upper end of the third slewing ring 503.
As shown in fig. 11 and 12, the housing includes an outer cylinder 101 and an inner cylinder 102 fixed to each other, the outer cylinder 101 and the inner cylinder 102 are spaced at a predetermined gap in a radial direction, and the scale ring 200 is rotatably disposed between the outer cylinder 101 and the inner cylinder 102; a second internal thread 202 is arranged on the inner wall of the scale ring 200, and a second external thread 1021 matched with the second internal thread 202 is arranged on the outer circle of the inner cylinder 102; the outer cylinder is provided with a reading window 1011 corresponding to the scale ring 200.
The second internal thread 202 and the second external thread 1021 are both drive threads, more specifically trapezoidal threads.
The injection device further comprises a support sleeve 600 for supporting the transmission component, wherein the support sleeve 600 is sleeved on the push rod 400 and is positioned between the drive sleeve 504 and the push rod sleeve 505; a fifth end face gear ring 601 is arranged on the upper end face of the support sleeve 600, the fifth end face gear ring 601 is a one-way end face gear ring which only transmits torque in the second circumferential direction and has a triangular tooth shape, and a sixth end face gear ring 5043 which is matched with the fifth end face gear ring 601 is arranged on the lower end face of the driving sleeve 504; the support sleeve 600 is fixed to the housing.
Specifically, the tooth profile of the fifth end ring 601 is the same as the tooth profile of the first end ring 5041.
The injection device further comprises a push rod head 403, the push rod head 403 is connected to the pushing end of the push rod 400, and the push rod head 403 and the push rod 400 can rotate relatively.
Specifically, the end of the pushing rod 400 is cylindrical or spherical, and the pushing rod head 403 is provided with a circular hole matching with the cylindrical or spherical shape.
Wherein the injection device further comprises a third resilient element 5052 which fixes the axial position of the vial 701, wherein one end of the third resilient element 5052 abuts the support sleeve 600 and the other end abuts the push rod sleeve 505 and pushes the push rod sleeve 505 to compress the vial 701 axially. The third resilient element 5052 may fix the axial position of the vial 701 as well as the axial position of the pusher sleeve 505.
Specifically, the third elastic part 5052 is a cylindrical compression spring. One end of the push rod sleeve 505 is provided with three sets of push rods 5053 extending towards the injection end of the housing, the push rods 5053 being used to compress the vial 701 as shown in fig. 13.
Wherein, the upper end of the scale ring 200 is fixed with an upper cover 204, and the upper cover 204 is arranged above the injection force transmission sleeve 302; a connecting shaft is fixed at the bottom of the pressing cap 301, penetrates through the upper cover and is connected to the injection force transmission sleeve 302; the injection device further comprises a fourth resilient part 203 maintaining the third face gear ring 201 and the fourth face gear ring 3021 in mesh, one end of the fourth resilient part 203 abutting against the upper end of the injection force transmission sleeve 302 and the other end abutting against the bottom end of the upper cover.
In particular, the fourth elastic part 203 is a wave washer.
Wherein the injection device further comprises a stop collar (not shown in the figures) for limiting the circumferential position of the push rod sleeve 505, and the stop collar is fixed at the injection end of the shell; the lower extreme of push rod cover 505 is located to the stop collar cover, the inner wall of stop collar is equipped with the rib of axial extension, the outer wall of push rod cover 505 one end be equipped with the axial groove 5055 that the rib corresponds.
Wherein the injection device further comprises a fifth resilient part 3011 limiting the mutual positional relationship of the pressing cap 301 and the injection force transmission sleeve 302. The fifth elastic part 3011 is sleeved on the connecting shaft at the lower end of the pressing cap 301, and the lower end of the fifth elastic part 3011 abuts against the upper end of the injection force transmission sleeve 302; specifically, the injection force transmission sleeve 302 is provided with a connection hole matched with the connection shaft, the pressing cap 301 extends into the connection hole of the injection force transmission sleeve 302 through the connection shaft, and circumferential flanges are respectively machined on the outer wall of the connection shaft and the inner wall of the connection hole to limit the axial positions of the connection shaft and the connection hole, but in order to facilitate disassembly, the connection hole is not completely clamped in the axial direction, so that the fifth elastic part 3011 is required to be further limited by elasticity. Note: since both are plastic parts, the press-in can be forced by pressure against the flange at the time of assembly.
Wherein, the injection end of the shell is provided with a third external thread 1023 for installing a medicine bin 702, and the medicine bin 702 is provided with a third internal thread 7021 matched with the third external thread 1023; the medicine bin 702 is used for installing the medicine bottle 701; the cartridge 702 and the vial 701 can be seen in fig. 14 and 15. Specifically, the cartridge 702 further comprises a fourth external thread 7022 disposed below the cartridge 702 for mounting a needle.
Wherein, as shown in fig. 16, the housing further comprises a protective cap 103 protecting the vial 701 and the cartridge 702, the protective cap 103 being provided with a hook 1031 for facilitating insertion into a pocket.
Wherein, the upper end of the scale ring 200 is further provided with knurls 205 for facilitating the rotation of the scale ring 200. The outer wall of the scale ring 200 is provided with a dose indicating scale 206.
The injection device of the embodiment can accurately transmit the torque and better control the injection dosage by transmitting the torque through the end face gear ring with the triangular tooth shape. Specifically, the control precision of the present embodiment can reach: 10 microliter.
In the description of the embodiments of the present invention, unless otherwise specified and limited, the term "connected" should be interpreted broadly, and may be, for example, an electrical connection, a communication between two elements, a direct connection, or an indirect connection through an intermediate medium, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
In the embodiment of the present invention, if the related terms "first \ second \ third" are used, only similar objects are distinguished, and no specific sequence for the objects is represented, it should be understood that "first \ second \ third" may exchange a specific sequence or order when allowed.
It should be appreciated that reference throughout this specification to "one embodiment" or "some embodiments" means that a particular feature, structure or characteristic described in connection with the embodiments is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic thereof, and should not constitute any limitation to the implementation process of the embodiments of the present invention. The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An injection device, characterized in that it comprises:
a housing; one end of the shell is an injection end connected with the medicine bottle, and the other end of the shell is an adjusting end for adjusting the dosage;
the scale ring is spirally lifted relative to the shell; the scale ring is positioned at the adjusting end of the shell, and the scale ring and the shell are both provided with corresponding thread structures;
an injection button exerting an axial injection thrust; the injection button is positioned at the adjusting end of the shell, and the lower end of the injection button is connected with the upper end of the scale ring; the scale ring spirally descends along a first circumferential direction along with the axial injection thrust of the injection button, and the injection button spirally descends along with the spiral descending of the scale ring;
a push rod for pushing the piston of the medicine bottle to move; the push rod is positioned in the shell and extends along the axial direction of the shell; the push rod comprises a pushing end connected with the medicine bottle and a stressed end connected with the injection button, and the pushing end of the push rod extends out of the injection end of the shell;
a transmission member that transmits an injection thrust of the injection button to the push rod; the transmission part comprises a rotary ring, a driving sleeve and a push rod sleeve;
the rotary ring is positioned below the injection button and is linked with the injection button in the circumferential direction;
the driving sleeve is positioned below the rotary ring, a first end face gear ring is arranged on one end face of the driving sleeve opposite to the rotary ring, the first end face gear ring is a one-way end face gear ring which only transmits torque in a first circumferential direction and has a triangular tooth shape, a second end face gear ring matched with the first end face gear ring is arranged on the lower end face of the rotary ring, and the driving sleeve rotates along with the rotation of the rotary ring in the first circumferential direction; the driving sleeve is sleeved on the push rod and is linked with the push rod in the circumferential direction;
the push rod sleeve is positioned below the driving sleeve and is fixed in position; the push rod sleeve is sleeved on the push rod, the push rod sleeve is provided with a first internal thread, and the push rod is provided with a first external thread matched with the first internal thread.
2. The injection device as claimed in claim 1, wherein the upper end of the scale ring is provided with a third end face gear ring, the third end face gear ring is a one-way end face gear ring which only transmits second circumferential torque and has a triangular tooth shape, and the lower end of the injection button is provided with a fourth end face gear ring matched with the third end face gear ring; when the scale ring rotates along the second circumferential direction, the injection button rotates along with the rotation of the scale ring.
3. The injection device of claim 2, wherein the swivel rings comprise a first swivel ring, a second swivel ring and a third swivel ring, the first swivel ring, the second swivel ring and the third swivel ring being nested in order in the axial direction and being axially retractable with respect to each other and being interlocked in the circumferential direction; the second end face gear ring is arranged on the lower end face of the first rotary ring, and the upper end of the third rotary ring is connected to the lower end of the injection button; and a first elastic part and a second elastic part for increasing the total axial length are arranged among the first revolving ring, the second revolving ring and the third revolving ring.
4. An injection device according to claim 3, wherein the injection button comprises a push cap and an injection force transmission sleeve connected to each other, the injection force transmission sleeve and the push cap being rotatable relative to each other; the lower end of the injection force transmission sleeve is provided with the fourth end face gear ring, and the injection force transmission sleeve is connected with the upper end of the third rotary ring.
5. The injection device as defined in claim 4, wherein the housing comprises an outer cylinder and an inner cylinder fixed to each other, the outer cylinder and the inner cylinder being spaced apart by a predetermined gap in a radial direction, the scale ring being rotatably disposed between the outer cylinder and the inner cylinder; a second internal thread is arranged on the inner wall of the scale ring, and a second external thread matched with the second internal thread is arranged on the outer circle of the inner cylinder; the outer barrel is provided with a reading window corresponding to the scale ring.
6. The injection device as claimed in claim 1 or 2, further comprising a support sleeve supporting the transmission member, the support sleeve being sleeved on the push rod and located between the drive sleeve and the push rod sleeve; the upper end face of the support sleeve is provided with a fifth end face gear ring, the fifth end face gear ring is a one-way end face gear ring which only transmits torque in a second circumferential direction and has a triangular tooth shape, and the lower end face of the drive sleeve is provided with a sixth end face gear ring matched with the fifth end face gear ring; the support sleeve is fixed on the shell.
7. The injection device as defined in claim 1 or 2, further comprising a push rod head connected to the pushing end of the push rod, wherein the push rod head and the push rod can rotate relatively.
8. The injection device of claim 6, further comprising a third resilient element that fixes the axial position of the vial, the third resilient element having one end abutting the support sleeve and the other end abutting the pusher sleeve and urging the pusher sleeve to axially compress the vial.
9. An injection device according to claim 4, wherein an upper cap is secured to the upper end of the scale ring, the upper cap being above the injection force transmitting sleeve; a connecting shaft is fixed at the bottom of the pressing cap, penetrates through the upper cover and is connected to the injection force transmission sleeve; the injection device further comprises a fourth elastic part for maintaining the third end face gear ring and the fourth end face gear ring to be meshed, one end of the fourth elastic part abuts against the upper end of the injection force transmission sleeve, and the other end of the fourth elastic part abuts against the bottom end of the upper cover.
10. The injection device according to claim 1 or 2, further comprising a stop collar limiting the circumferential position of the push rod collar, the stop collar being fixed to the injection end of the housing; the limit sleeve is sleeved at the lower end of the push rod sleeve, the inner wall of the limit sleeve is provided with ribs extending axially, and the outer wall of one end of the push rod sleeve is provided with axial grooves corresponding to the ribs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922382546.9U CN212067367U (en) | 2019-12-26 | 2019-12-26 | Injection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922382546.9U CN212067367U (en) | 2019-12-26 | 2019-12-26 | Injection device |
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| CN212067367U true CN212067367U (en) | 2020-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113041455A (en) * | 2019-12-26 | 2021-06-29 | 苏州晨拓思创医疗科技有限公司 | Injection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113041455A (en) * | 2019-12-26 | 2021-06-29 | 苏州晨拓思创医疗科技有限公司 | Injection device |
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Effective date of registration: 20231124 Address after: Unit E866, 5th Floor, Lecheng Plaza, Phase II, Biopharmaceutical Industrial Park, No. 218 Sangtian Street, Suzhou Area, China (Jiangsu) Pilot Free Trade Zone, Suzhou City, Jiangsu Province, 215000 Patentee after: Suzhou Tianhe Yunduo Medical Technology Co.,Ltd. Address before: 215000 501, building 1, 112 Yingchun South Road, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: Suzhou Chentuo Sichuang Medical Technology Co.,Ltd. |