CN220373165U - Needle pressing mechanism of injector - Google Patents
Needle pressing mechanism of injector Download PDFInfo
- Publication number
- CN220373165U CN220373165U CN202321711940.2U CN202321711940U CN220373165U CN 220373165 U CN220373165 U CN 220373165U CN 202321711940 U CN202321711940 U CN 202321711940U CN 220373165 U CN220373165 U CN 220373165U
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- Prior art keywords
- needle
- pressure sensor
- plate
- pressure head
- lifting
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- 238000003825 pressing Methods 0.000 title claims abstract description 72
- 230000001360 synchronised effect Effects 0.000 claims description 34
- 230000003028 elevating effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000002788 crimping Methods 0.000 claims 1
- 229940071643 prefilled syringe Drugs 0.000 description 6
- 239000003814 drug Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229940127217 antithrombotic drug Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a needle pressing mechanism of an injector, which comprises a pressure head, a lifting plate, a pressure sensor and a lifting mechanism, wherein the lifting plate is connected with the lifting mechanism, the lifting mechanism drives the lifting plate to lift, the pressure sensor is arranged in the lifting plate, the pressure head is positioned below the pressure sensor, the pressure head is limited in the lifting plate and is in sliding fit with the lifting plate, a needle avoiding cavity for accommodating a needle tube is arranged in the pressure head, when the lifting plate is driven by the lifting mechanism to descend until the pressure head is pressed on a needle seat, the needle tube stretches into the needle avoiding cavity, the pressure head simultaneously applies force to the pressure sensor upwards until the lifting plate descends for a set distance, and the needle seat is pressed on a joint by the pressure head. The utility model can monitor the assembly quality on line in real time and can ensure the stability and consistency of the needle assembly.
Description
Technical Field
The utility model relates to prefilled syringe filling equipment, in particular to a syringe needle pressing mechanism.
Background
The prefilled syringe is a novel medicine package material developed in recent years, has two functions of medicine storage and common injection, and is mainly used for packaging products such as vaccines, biological products, biochemical products, antithrombotic drugs and the like.
A pre-filled syringe of the prior art (shown in fig. 1) generally includes a barrel including a housing 25 and a connector 26, a needle including a barrel 27 and a hub 28, a core 24, and the like. The prefilled syringe can be directly used without sucking liquid medicine when in use, thereby reducing operation steps and reducing the risk of cross infection.
In the production of prefilled syringes, it is necessary to assemble the needle with the barrel (to assemble the hub to the adapter) so that the needle and the barrel are fixed as an integral structure. At present, a needle seat and a connector are directly pressed by a mechanical arm (namely a mechanical clamping jaw), which has the following defects: the manipulator is usually driven through air supply (compressed gas), and air supply pressure (power supply) is unstable, and can't monitor the assembly quality of syringe needle and cylinder on line in real time, therefore can't guarantee the stability and the uniformity of syringe needle assembly.
Disclosure of Invention
The utility model provides a syringe needle pressing mechanism capable of monitoring assembly quality on line in real time and ensuring the stability and consistency of needle assembly, which aims to solve the problem that the needle is pressed on a connector by a manipulator in the prior art and cannot ensure the stability and consistency of needle assembly.
In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model relates to a needle pressing mechanism of an injector, which comprises a pressure head, a lifting plate, a pressure sensor and a lifting mechanism, wherein the lifting plate is connected with the lifting mechanism, the lifting mechanism drives the lifting plate to lift, the pressure sensor is arranged in the lifting plate, the pressure head is positioned below the pressure sensor, the pressure head is limited in the lifting plate and is in sliding fit with the lifting plate, a needle avoiding cavity for accommodating a needle tube is arranged in the pressure head, when the lifting plate is driven by the lifting mechanism to descend until the pressure head is pressed on a needle seat, the needle tube stretches into the needle avoiding cavity, the pressure head simultaneously applies force to the pressure sensor upwards until the lifting plate descends for a set distance, and the needle seat is pressed on a joint by the pressure head. In the utility model, the pressure sensor is connected with the control system and is used for detecting and feeding back the reaction force (namely the pressure of the pressure head during the press mounting) applied when the pressure head presses the needle seat; the pressure sensor can contact or not contact with the pressure head in an initial state, when the lifting mechanism drives the pressure head to descend to a position above the needle head, the needle tube is aligned with the needle avoiding cavity, the needle tube gradually stretches into the needle avoiding cavity along with the continuous descending of the lifting plate, and when the pressure head descends to generate blocking interference with a step on the needle seat: if the pressure sensor and the pressure head are not contacted (a movable gap exists between the pressure sensor and the pressure head) in the initial state, the pressure head is blocked by the needle seat and relatively slides between the lifting plate, so that the pressure head and the pressure sensor relatively move (the pressure sensor relatively descends) until the pressure sensor is contacted with the pressure head (the pressure head cannot relatively slide with the lifting plate due to the limit of the pressure sensor), a relatively moving trend is generated between the pressure sensor and the pressure head, the pressure head upwards applies pressure to the pressure sensor, and the pressure sensor detects and feeds back the downward pressure until the needle seat is pressed on the connector; if the pressure sensor contacts with the pressure head in the initial state (the pressure head cannot slide relatively with the lifting plate due to the limit of the pressure sensor), the pressure head cannot slide relatively with the lifting plate when blocked by the needle seat, but the pressure sensor and the pressure head directly generate a relative movement trend, and the pressure sensor downwards applies force to the pressure head; as the lifting plate continues to descend, the pressure sensor and the pressure head are propped against and synchronously descend, the pressure head applies pressure to the pressure sensor upwards, the pressure sensor detects and feeds back the downward pressure until the needle seat is pressed on the joint; in the process of pressing the needle seat, if the pressure sensor detects that the reaction force received by the pressure head (namely the pressure of the pressure head) is not in the range of a set value, alarming and stopping the machine through a control system; the pressure sensor is used for detecting the reaction force (namely the pressure of the pressure head) received by the pressure head on line in real time, so that the stability of the pressure mounting pressure can be ensured, and the abnormal condition of the needle head during the pressure mounting can be monitored on line in real time, thereby ensuring the stability and consistency of the needle head assembly; in addition, the needle head is pressed through the cooperation of the pressure head and the lifting mechanism, so that the pressure is stable, and the stability of assembly is guaranteed.
Preferably, the lifting mechanism comprises a lifting shaft, a shaft fixing block, a driving synchronous pulley, a driven synchronous pulley, a synchronous belt and a servo motor, wherein the upper end of the lifting shaft is fixedly connected with the lifting plate, the lower end of the lifting shaft is fixedly connected with the shaft fixing block, the shaft fixing block is integrally fixed with the synchronous belt through the synchronous belt clamping block, the synchronous belt is wound on the driving synchronous pulley and the driven synchronous pulley, and the servo motor is fixedly connected with the driving synchronous pulley. The lifting mechanism adopts the servo motor as a power source, can rapidly react, has controllable speed and accurate position precision.
Preferably, the lifting mechanism further comprises a fixed bearing seat, and the lifting shaft penetrates through the bearing seat and is in sliding fit with the bearing seat.
Preferably, the lifting plate comprises an upper mounting plate and a lower mounting plate, the upper end of the lifting shaft is fixedly connected with the upper mounting plate, an installation cavity with an open bottom is arranged on the bottom surface of the upper mounting plate, the pressure sensor is fixed in the installation cavity, the lower mounting plate is fixed below the upper mounting plate, a guide hole is formed in the lower mounting plate, and the pressure head is limited in the guide hole and is in sliding fit with the lower mounting plate. The lifter plate includes mounting panel and lower mounting panel, easy dismounting, the dismouting of parts such as pressure sensor and pressure head of being convenient for.
Preferably, the pressure head comprises a pressure needle head, a guide rod and a limiting pressing block, wherein the limiting pressing block and the pressure needle head are respectively fixed at the upper end and the lower end of the guide rod, the limiting pressing block is positioned outside the guide hole and limited by the lower mounting plate, a movable gap is arranged between the limiting pressing block and the pressure sensor, the limiting pressing block can enter the mounting cavity through an opening at the bottom of the mounting cavity, the guide rod is positioned in the guide hole and can slide up and down along the guide hole, and a pore canal which is communicated with the pressure needle head, the guide rod and the limiting pressing block is arranged in the pore canal which is the needle avoiding cavity. Under the condition of natural stress, a movable gap is arranged between the limiting pressing block and the pressure sensor, when the movable gap enables the needle pressing head to descend to be blocked by the needle seat, the needle pressing head can stably fall on the step surface of the needle seat and is supported by the needle seat, along with the continuous descending of the lower mounting plate, the guide rod is lifted by the needle seat to generate relative sliding until the limiting pressing block is contacted with the pressure sensor, so that when the pressure sensor downwards applies force to the pressing head (the pressing head is pressed down), the needle pressing head can be fully contacted with the needle seat, the needle seat is uniformly stressed, the press mounting process is stable, the assembly quality is guaranteed, and the deflection is not easy to generate.
Preferably, the guide rod is sleeved with a bushing, a limiting ring is arranged on the circumferential surface of the lower side of the guide rod, and the bushing is limited between the limiting pressing block and the limiting ring.
Preferably, the lifting plate further comprises a fastening pressing plate, the fastening pressing plate is fixed on the bottom surface of the upper mounting plate to fasten the pressure sensor in the mounting cavity, and an exposure hole for exposing the pressure sensor is formed in the fastening pressing plate. The lifter plate passes through the fastening clamp plate fastening in the installation cavity for pressure sensor's dismouting is very convenient.
Preferably, the upper mounting plate is provided with a wire hiding cover.
Therefore, the utility model has the following beneficial effects: through the cooperation between elevating system, pressure sensor and the pressure head, can guarantee the stability of pressure equipment pressure, the unusual condition when can on-line real-time supervision syringe needle pressure equipment again to guarantee the stability and the uniformity of syringe needle assembly.
Drawings
Fig. 1 is a schematic view of a structure of a conventional prefilled syringe.
Fig. 2 is a schematic view of the needle structure of the prefilled syringe of fig. 1.
Fig. 3 is a perspective view of the present utility model.
FIG. 4 is a schematic diagram of the cooperation of the lifter plate, pressure sensor, fastening platen, and ram.
Fig. 5 is an exploded view of fig. 4.
Fig. 6 is a right side view of fig. 4.
Fig. 7 is a cross-sectional view of fig. 4 taken along A-A.
Fig. 8 is a perspective view of a ram.
Fig. 9 is an exploded view of fig. 8.
In the figure: the pressure sensor 1, the needle avoidance cavity 2, the lifting shaft 3, the shaft fixing block 4, the driving synchronous pulley 5, the driven synchronous pulley 6, the synchronous belt 7, the servo motor 8, the synchronous belt clamping block 9, the bearing seat 10, the upper mounting plate 11, the lower mounting plate 12, the mounting cavity 13, the guide hole 14, the needle pressing head 15, the guide rod 16, the limit pressing block 17, the movable gap 18, the bushing 19, the limit ring 20, the fastening pressing plate 21, the exposure hole 22, the wire hiding cover 23, the core bar 24, the outer sleeve 25, the joint 26, the needle tube 27 and the needle seat 28.
Detailed Description
The utility model is further described below with reference to the drawings and detailed description.
The needle pressing mechanism of the injector shown in fig. 3 comprises a pressing head, a lifting plate, a pressure sensor 1 and a lifting mechanism, wherein the lifting mechanism comprises a lifting shaft 3, a shaft fixing block 4, a driving synchronous pulley 5, a driven synchronous pulley 6, a synchronous belt 7, a servo motor 8 and a bearing seat 10, the bearing seat is fixedly arranged on a frame (not shown in the figure), the lifting shaft penetrates through the bearing seat and is in sliding fit with the bearing seat, the lower end of the lifting shaft is fixedly connected with the shaft fixing block, the shaft fixing block is fixedly integrated with the synchronous belt through a synchronous belt clamping block 9, the synchronous belt is wound on the driving synchronous pulley and the driven synchronous pulley, the servo motor is fixedly connected with the driving synchronous pulley, the servo motor and the driven synchronous pulley are both fixed on the frame, the lifting plate comprises an upper mounting plate 11, a lower mounting plate 12 and a fastening pressing plate 21 (shown in fig. 4, 5, 6 and 7), the upper end of the lifting shaft is fixedly connected with an upper mounting plate, a wire hiding cover 23 is fixed on the top surface of the upper mounting plate, a mounting cavity 13 with an open bottom is formed in the bottom surface of the upper mounting plate, a pressure sensor is fixed in the mounting cavity, a lower mounting plate is fixed below the upper mounting plate, a fastening pressing plate is fixed on the bottom surface of the upper mounting plate so as to fasten the pressure sensor in the mounting cavity, a gap exists between the fastening pressing plate and the lower mounting plate, an exposure hole 22 for exposing the pressure sensor is formed in the fastening pressing plate, the pressing head is positioned below the pressure sensor, a guide hole 14 is formed in the lower mounting plate, the pressing head is limited in the guide hole and is in sliding fit with the lower mounting plate, the pressing head comprises a needle 15, a guide rod 16 and a limit pressing block 17 (shown in figures 8 and 9), the guide rod is positioned in the guide hole and can slide up and down along the guide hole, the limit pressing block and the needle are respectively fixed at the upper end and the lower end of the guide rod, the guide rod is sleeved with a bushing 19, the limiting pressing block is located outside the guide hole and limited by the lower mounting plate, a limiting ring 20 is arranged on the circumferential surface of the lower side of the guide rod, the bushing is limited between the limiting pressing block and the limiting ring, a movable gap 18 is arranged between the limiting pressing block and the pressure sensor, the limiting pressing block can enter the mounting cavity through an opening at the bottom of the mounting cavity, and a pore canal which is communicated with the needle pressing head, the guide rod and the limiting pressing block is arranged in the pore canal which is communicated with the needle avoiding cavity 2.
The operation principle of the utility model is as follows: the needle cylinder is hung in the die in a mode that the joint faces upwards, the pressure head is positioned above the needle cylinder, the needle head is transferred to the position above the joint through the manipulator, and the needle cylinder is aligned with the needle avoiding cavity; the servo motor drives the synchronous belt and the synchronous belt clamping block to drive the lifting shaft, the shaft fixing block and the lifting plate to simultaneously descend, along with the descending of the lifting plate, the needle tube gradually stretches into the needle avoiding cavity, when the needle pressing head descends to be connected to the needle seat, the needle pressing head stably falls on the step surface of the needle seat and is supported by the needle seat, the guide rod is jacked up by the needle seat and generates relative sliding until the limiting pressing block is contacted with the pressure sensor, the pressure sensor and the pressing head generate relative movement trend, along with the continuous descending of the lifting plate, the pressure sensor and the limiting pressing block are propped against (the pressing head applies force to the pressure sensor upwards through the limiting pressing block) and synchronously descends, the needle pressing head is enabled to downwards press the needle seat, after the lifting plate descends by a set distance, the needle seat is pressed on the connecting head, the servo motor is reversed, and the lifting plate ascends and resets.
The above-described embodiment is only a preferred embodiment of the present utility model, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (8)
1. The utility model provides a syringe needle pressing mechanism, its characterized in that includes pressure head, lifter plate, pressure sensor (1) and elevating system, the lifter plate links to each other with elevating system, elevating system drives the lifter plate and goes up and down, pressure sensor sets up in the lifter plate, the pressure head is located the pressure sensor below, and the pressure head is spacing in the lifter plate and with sliding fit between the lifter plate, is equipped with in the pressure head and is used for holding needle tubing keep away needle chamber (2), when the lifter plate descends to the pressure head crimping when on the needle file under elevating system's drive, the needle tubing stretches into and keeps away needle intracavity, and the pressure head upwards applies force in pressure sensor simultaneously, until the lifter plate descends to set for the distance, and the needle file is pressed to the joint by the pressure head.
2. The needle pressing mechanism of the injector according to claim 1, wherein the lifting mechanism comprises a lifting shaft (3), a shaft fixing block (4), a driving synchronous pulley (5), a driven synchronous pulley (6), a synchronous belt (7) and a servo motor (8), the upper end of the lifting shaft is fixedly connected with the lifting plate, the lower end of the lifting shaft is fixedly connected with the shaft fixing block, the shaft fixing block is integrally fixed with the synchronous belt through a synchronous belt clamping block (9), the synchronous belt is wound on the driving synchronous pulley and the driven synchronous pulley, and the servo motor is fixedly connected with the driving synchronous pulley.
3. A syringe needle pressing mechanism according to claim 2, characterized in that the lifting mechanism further comprises a stationary bearing housing (10), the lifting shaft passing through and being in sliding engagement with the bearing housing.
4. The syringe needle pressing mechanism according to claim 2, wherein the lifting plate comprises an upper mounting plate (11) and a lower mounting plate (12), the upper end of the lifting shaft is fixedly connected with the upper mounting plate, an installation cavity (13) with an open bottom is arranged on the bottom surface of the upper mounting plate, the pressure sensor is fixed in the installation cavity, the lower mounting plate is fixed below the upper mounting plate, a guide hole (14) is arranged in the lower mounting plate, and the pressure head is limited in the guide hole and is in sliding fit with the lower mounting plate.
5. The syringe needle pressing mechanism according to claim 4, wherein the pressure head comprises a needle pressing head (15), a guide rod (16) and a limiting pressing block (17), the limiting pressing block and the needle pressing head are respectively fixed at the upper end and the lower end of the guide rod, the limiting pressing block is positioned outside the guide hole and limited by the lower mounting plate, a movable gap (18) is arranged between the limiting pressing block and the pressure sensor, the limiting pressing block can enter the mounting cavity through an opening at the bottom of the mounting cavity, the guide rod is positioned in the guide hole and can slide up and down along the guide hole, and the communicated pore canals are arranged in the needle pressing head, the guide rod and the limiting pressing block, and are needle avoiding cavities.
6. The needle pressing mechanism of the injector according to claim 5, wherein a bushing (19) is sleeved outside the guide rod, a limiting ring (20) is arranged on the circumferential surface of the lower side of the guide rod, and the bushing is limited between the limiting pressing block and the limiting ring.
7. A syringe needle pressing mechanism according to claim 5, wherein the lifting plate further comprises a fastening pressing plate (21) fixed to the bottom surface of the upper mounting plate to fasten the pressure sensor in the mounting cavity, and the fastening pressing plate is provided with an exposing hole (22) for exposing the pressure sensor.
8. The needle pressing mechanism of the injector according to claim 4, wherein the upper mounting plate is provided with a wire hiding cover (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321711940.2U CN220373165U (en) | 2023-06-30 | 2023-06-30 | Needle pressing mechanism of injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321711940.2U CN220373165U (en) | 2023-06-30 | 2023-06-30 | Needle pressing mechanism of injector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220373165U true CN220373165U (en) | 2024-01-23 |
Family
ID=89572335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321711940.2U Active CN220373165U (en) | 2023-06-30 | 2023-06-30 | Needle pressing mechanism of injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220373165U (en) |
-
2023
- 2023-06-30 CN CN202321711940.2U patent/CN220373165U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |