CN114272471A

CN114272471A - Injection device and injection device

Info

Publication number: CN114272471A
Application number: CN202111646061.1A
Authority: CN
Inventors: 陶俊; 王雅静; 赵宗凯
Original assignee: Sun Yat Sen Memorial Hospital Sun Yat Sen University
Current assignee: Sun Yat Sen Memorial Hospital Sun Yat Sen University
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-04-05
Anticipated expiration: 2041-12-29
Also published as: CN114272471B

Abstract

The invention provides injection equipment and a pushing injection device. The power mechanism is used for storing mechanical energy and generating rotary kinetic energy by utilizing the mechanical energy. The transmission mechanism is in transmission connection with the power mechanism. The injection mechanism is in transmission connection with the transmission mechanism, so that the injection mechanism can push the injector to inject. The speed change mechanism is in transmission connection with the transmission mechanism and is used for controlling the moving speed of the injection mechanism. The injection equipment and the injection device can realize automatic injection under the condition of no electric power, are simple to operate and low in production cost, and are convenient to carry and maintain. In addition, this application still controls the translation rate of pushing the mechanism through speed change mechanism, and then makes pushing the mechanism and can promote the syringe with stable, slow speed and inject to injection device and injection device's stability and security have been improved.

Description

Injection device and injection device

Technical Field

The invention relates to the technical field of medical treatment, in particular to injection equipment and a pushing injection device.

Background

With the continuous development of medical technology, material technology and mechanical technology, the requirements of the medical industry on efficiency and quality are improved, and a great amount of technical innovation is needed particularly in the aspects of reducing the labor intensity of nurses, reducing the error occurrence probability in the clinical treatment process and the like. In order to reduce the labor intensity of nurses and the probability of errors occurring during treatment, conventional injection devices employ a bolus pump to assist in the administration of medication. However, the conventional injection device has the problems of battery power supply, heavy volume, inconvenient use and arrangement and the like, so that the injection device is inconvenient to use in the use environment such as emergency or power failure outside a hospital.

Disclosure of Invention

Therefore, it is necessary to provide an injection device and a bolus device, aiming at the problems of the conventional injection device that the battery is needed to supply power, the volume is heavy, the use and the setting are inconvenient, and the like, so that the injection device is inconvenient to use in the use environment such as emergency or power failure outside a hospital.

The technical scheme is as follows:

in one aspect, a bolus device is provided, comprising:

the power mechanism is used for storing mechanical energy and generating rotary kinetic energy by utilizing the mechanical energy;

the transmission mechanism is in transmission connection with the power mechanism;

the injection mechanism is in transmission connection with the transmission mechanism, so that the injection mechanism can push the injector to inject;

and the speed change mechanism is in transmission connection with the transmission mechanism and is used for controlling the moving speed of the injection mechanism.

The technical solution is further explained below:

in one embodiment, the power mechanism comprises a rotating shaft in transmission connection with the transmission mechanism, a knob with an accommodating cavity, and a clockwork spring arranged in the accommodating cavity, wherein one end of the rotating shaft, which is far away from the transmission mechanism, is rotatably arranged in the accommodating cavity and is fixedly connected with one end of the clockwork spring, and the other end of the clockwork spring is fixedly connected with the inner side wall of the accommodating cavity, so that the clockwork spring can be wound to store mechanical energy and can be loosened to release the mechanical energy, and further the rotating shaft can be driven to rotate.

In one embodiment, the outer side wall of the knob is provided with a first external tooth part, and the injection device further comprises a limiting mechanism engaged with the first external tooth part and used for limiting the rotation of the knob along the direction in which the clockwork spring is loosened.

In one embodiment, the injection device further includes a first housing, the limiting mechanism includes a limiting member and a first pawl rotatably connected to the first housing, one end of the first pawl is engaged with the first external tooth portion, and the limiting member is configured to limit a rotational position of the first pawl, so that the first pawl can limit the first external tooth portion to rotate in a direction in which the spring is loosened.

In one embodiment, the transmission mechanism includes a first gear and a rack arranged along an axial direction of the injector, the first gear is sleeved on the rotating shaft, the first gear is in transmission connection with the rack, and the rack is fixedly connected with the injection mechanism.

In one embodiment, one end of the rack far away from the first gear is provided with a idle rotation part, so that the first gear can idle after driving the rack to move to a preset position.

In one embodiment, the bolus mechanism further comprises a clutch mechanism in transmission connection with both the first gear and the speed change mechanism, and the clutch mechanism is used for cutting off or connecting a power transmission path between the speed change mechanism and the first gear.

In one embodiment, the clutch mechanism includes a first transmission element and a second transmission element, the second transmission element is provided with an inner tooth portion and a second outer tooth portion, the second outer tooth portion is in transmission connection with the speed change mechanism, the first transmission element is in transmission connection with the first gear, the first transmission element is arranged through the inner tooth portion, so that when the first transmission element rotates along a first direction, the first transmission element is meshed with the inner tooth portion and rotates synchronously, and when the first transmission element rotates along a second direction, the first transmission element is in an idle rotation state.

In one embodiment, the first transmission element includes a second gear and a second pawl fixedly connected to the second gear, the second gear is in transmission connection with the first gear, the second pawl is disposed in the inner tooth portion, such that when the second pawl rotates in the first direction, the second pawl is engaged with the inner tooth portion and rotates synchronously, and when the second pawl rotates in the second direction, the second pawl is in an idle rotation state.

In one embodiment, the speed change mechanism comprises a balance spring for generating a fixed frequency, an escapement fork rotationally connected with the balance spring, an escapement wheel in meshing connection with the escapement fork, and a speed change gear set in meshing connection with the escapement wheel, wherein the speed change gear set is in transmission connection with the transmission mechanism and is used for controlling the movement speed of the bolus mechanism.

In one embodiment, the injector comprises a cylinder and a push rod in sliding fit with the cylinder, the injection device further comprises a fixing mechanism for fixing the cylinder and a second housing for fixing the fixing mechanism, the injection mechanism comprises a first sliding part and a contact part for contacting the push rod, the contact part is arranged at one end of the first sliding part far away from the fixing mechanism, and the fixing mechanism is provided with a second sliding part in sliding fit with the first sliding part, so that the contact part can push the push rod to move in the direction close to the fixing mechanism.

In another aspect, an injection apparatus is further provided, where the injection apparatus includes a syringe and the bolus device is configured to push the syringe to perform injection.

In the use process of the injection device and the injection device of the embodiment, firstly, the injector and the injection mechanism are correspondingly arranged, so that the injection mechanism can push the injector to inject. And secondly, driving the power mechanism to enable the power mechanism to store mechanical energy and enable the mechanical energy stored by the power mechanism to be converted into rotational kinetic energy. Then, under the effect of rotatory kinetic energy for the drive mechanism who is connected with power unit transmission can remove, and then makes drive mechanism can promote the mechanism of injecting and remove, and makes the mechanism of injecting to push and to push the syringe and inject, thereby realizes carrying out automatic injection under the condition that does not have electric power, easy operation, low in production cost, and carry and maintain the convenience. Finally, the speed change mechanism is connected with the transmission mechanism in a transmission manner, and the transmission mechanism is connected with the injection mechanism in a transmission manner, so that the speed change mechanism can control the moving speed of the injection mechanism, and the injection mechanism can push the injector to inject at a stable and slow speed, and the stability and the safety of the injection device and the injection device are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a bolus device according to one embodiment;

FIG. 2 is a schematic view of the injector device of FIG. 1 from another perspective;

FIG. 3 is a schematic view of the injector device of FIG. 1 from a further viewing angle;

FIG. 4 is a schematic view of a portion of the structure of the injection device of FIG. 1;

fig. 5 is a schematic structural view of the power mechanism in fig. 1;

FIG. 6 is another schematic diagram of a portion of the injector device of FIG. 1;

FIG. 7 is a sectional view taken along the line A-A in FIG. 6;

FIG. 8 is a schematic structural view of the clutch mechanism of FIG. 4;

FIG. 9 is a schematic structural view of the transmission mechanism and the shifting mechanism of FIG. 4;

fig. 10 is a schematic view of the bolus device of fig. 1 from yet another viewing angle.

Description of reference numerals:

10. a bolus injection device; 100. a power mechanism; 110. a rotating shaft; 120. a knob; 121. an accommodating chamber; 122. a first outer tooth portion; 130. a clockwork spring; 200. a transmission mechanism; 210. a first gear; 220. a rack; 221. a idling section; 300. a bolus mechanism; 310. a first sliding section; 320. a contact part; 400. a speed change mechanism; 410. a balance spring; 420. a pallet fork; 430. an escape wheel; 440. a speed change gear set; 441. a first speed change gear; 442. a second speed change gear; 500. a limiting mechanism; 510. a first pawl; 600. a clutch mechanism; 610. a first transmission element; 611. a second gear; 612. a second pawl; 620. a second transmission element; 621. an inner tooth portion; 622. a second outer tooth portion; 700. a fixing mechanism; 710. a second sliding section; 720. a base; 721. a groove; 722. a side groove; 730. an upper cover; 740. a locking member; 800. a first housing; 900. a second housing; 1000. an injector; 1010. a barrel; 1020. a push rod.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1 to 4, in one embodiment, a bolus device 10 is provided, which includes a power mechanism 100, a transmission mechanism 200, a bolus mechanism 300, and a speed change mechanism 400. The power mechanism 100 is configured to store mechanical energy and generate rotational kinetic energy by using the mechanical energy. The transmission mechanism 200 is in transmission connection with the power mechanism 100. Bolus mechanism 300 is drivingly connected to drive mechanism 200 such that bolus mechanism 300 is capable of propelling syringe 1000 for injection. Speed change mechanism 400 is in driving connection with transmission mechanism 200, and speed change mechanism 400 is used for controlling the moving speed of bolus mechanism 300.

In the use process of the above-mentioned injection device 10 of the embodiment, first, the injector 1000 is arranged corresponding to the injection mechanism 300, so that the injection mechanism 300 can push the injector 1000 to inject. Next, the power mechanism 100 is driven such that the power mechanism 100 stores mechanical energy and such that the mechanical energy stored in the power mechanism 100 can be converted into rotational kinetic energy. Then, under the action of the rotational kinetic energy, the transmission mechanism 200 in transmission connection with the power mechanism 100 can move, so that the transmission mechanism 200 can push the injection mechanism 300 to move, and the injection mechanism 300 can push the injector 1000 to inject, thereby realizing automatic injection without electric power, and having the advantages of simple operation, low production cost, and convenient carrying and maintenance. Finally, the speed change mechanism 400 is in transmission connection with the transmission mechanism 200, and the transmission mechanism 200 is in transmission connection with the bolus mechanism 300, so that the speed change mechanism 400 can control the moving speed of the bolus mechanism 300, and further the bolus mechanism 300 can push the injector 1000 at a stable and slow speed for injection, thereby improving the stability and safety of the bolus device 10.

The power mechanism 100 may store mechanical energy and generate rotational kinetic energy using the mechanical energy by using a spring 130, a torsion spring, or the like.

As shown in fig. 5, the power mechanism 100 optionally includes a rotating shaft 110 for driving connection with the transmission mechanism 200, a knob 120 having a receiving cavity 121, and a spring 130 disposed in the receiving cavity 121. One end of the rotating shaft 110 far away from the transmission mechanism 200 is rotatably disposed in the accommodating cavity 121 and is fixedly connected with one end of the clockwork spring 130. The other end of the spring 130 is fixedly connected to the inner sidewall of the accommodating cavity 121, so that the spring 130 can be wound to store mechanical energy and can be unwound to release the mechanical energy, thereby driving the rotating shaft 110 to rotate. So, wind around pivot 110 through drive clockwork spring 130 for clockwork spring 130 can be rolled up on pivot 110 and store mechanical energy, and then when syringe 1000 needs to inject, unclamp clockwork spring 130, make clockwork spring 130 can release mechanical energy and turn into rotatory kinetic energy with mechanical energy, and then under rotatory kinetic energy's effect, make clockwork spring 130 can drive pivot 110 and rotate, thereby make injection device 10 also can use under the condition that does not have the electric energy, improved injection device 10's suitability.

Optionally, the power mechanism 100 may also drive the rotating shaft 110 to further wind the spring 130 on the rotating shaft 110 and store mechanical energy, and release the mechanical energy through the knob 120 to further enable the knob 120 to rotate, which is similar to the principle of the above embodiment and will not be described herein again.

The rotating shaft 110 is in transmission connection with the transmission mechanism 200, and the transmission mechanism 200 can be sleeved on the rotating shaft 110, or can be in a belt transmission mode or other transmission modes.

One end of the rotating shaft 110, which is far away from the transmission mechanism 200, is rotatably disposed in the accommodating cavity 121, and may be rotatably connected to the bottom wall of the accommodating cavity 121, or may be rotatably connected to the rotating shaft 110 through a bearing or other rotating connection manner disposed in the accommodating cavity 121.

One end of the spring 130 is fixedly connected with the rotating shaft 110, and the other end of the spring 130 is fixedly connected with the rotating shaft 110, and the spring 130 and the rotating shaft can be fixedly connected in a welding, clamping, inserting or other fixing connection mode.

Optionally, the inner side wall of the accommodating cavity 121 is provided with a first through hole for fixing one end of the spring 130 close to the inner side wall. The end of the rotating shaft 110 far away from the transmission mechanism 200 is provided with a second through hole for fixing the other end of the spring 130 near the rotating shaft 110. Therefore, the two ends of the spring 130 are correspondingly and fixedly connected with the first through hole and the second through hole, so that the spring 130 can be reliably arranged in the accommodating cavity 121, and the reliability of the power mechanism 100 is further improved.

As shown in fig. 6 and 7, the outer sidewall of the knob 120 is further provided with a first external tooth portion 122. The bolus device 10 further includes a stop mechanism 500 engaged with the first external tooth portion 122. The limiting mechanism 500 is used to limit the rotation of the knob 120 in the direction in which the clockwork spring 130 is loosened. Thus, the limiting mechanism 500 is engaged with the first external tooth portion 122 and limits the rotation of the knob 120 along the direction in which the spring 130 is loosened, so that the knob 120 can only drive the spring 130 to wind, the conversion efficiency of converting the mechanical energy stored in the spring 130 into the rotational kinetic energy for driving the rotating shaft 110 to rotate is improved, and the reliability and the injection period of the injection of the injector 1000 of the injection mechanism 300 are improved.

Still further, the bolus device 10 also includes a first housing 800. The limiting mechanism 500 includes a limiting member (not shown) and a first pawl 510 rotatably connected to the first housing 800. One end of the first pawl 510 is in meshing engagement with the first external tooth 122. The stopper serves to restrict the rotational position of the first pawl 510 such that the first pawl 510 can restrict the first external tooth portion 122 from rotating in the direction in which the power spring 130 is loosened. Thus, when the knob 120 is driven to rotate, so that the spring 130 is driven to wind by the knob 120, the limiting member does not have a limiting effect on the rotation position of the first pawl 510, and the first external tooth portion 122 is in transmission connection with the first pawl 510. When the rotation of the driving knob 120 is stopped and the clockwork spring 130 is loosened, the limiting member can limit the rotation position of the first pawl 510, so that the first pawl 510 can limit the first external tooth portion 122 to rotate along the direction that the clockwork spring 130 is loosened, and further, the knob 120 can only rotate along the direction that the clockwork spring 130 is wound, and therefore, the stability and the reliability of the mechanical energy stored in the power mechanism 100 are improved.

Optionally, the knob 120 is rotatably coupled to the first housing 800. Thus, the power mechanism 100 can be stably and reliably connected to the first housing 800.

Optionally, the first housing 800 is provided with a third through hole for rotatably connecting with the rotating shaft 110, so that the first tooth portion and the power mechanism 100 are respectively disposed at two sides of the first housing 800. Thus, the power mechanism 100 and the first gear 210 do not interfere with each other, and the reliability of the injection device 10 is improved.

The first housing 800 is rotatably connected to the first pawl 510, and the knob 120 is rotatably connected to the first housing 800, which may be connected via a bearing, a rotating shaft 110 or other mechanisms.

Wherein. The first external tooth portion 122 may be an external gear formed by a plurality of teeth arranged at intervals on an outer sidewall of the knob 120 in a matched manner.

The limiting part can be a tension spring, a limiting block or other limiting structures. The limiting member may be fixed to the first housing.

Specifically, the limiting member is provided as a tension spring. One end of the tension spring is fixedly connected to one end of the first pawl 510 near the first external tooth 122. The other end of the tension spring is fixedly connected with the first housing 800. The tension spring serves to restrict the rotational position of the first pawl 510 so that the first pawl 510 can restrict the first external teeth portion 122 from rotating in the direction in which the power spring 130 is loosened. So, when the driving knob 120 rotates, so that the knob 120 drives the spring 130 to wind, the first external tooth portion 122 disposed on the knob 120 drives the first pawl 510 to rotate, and then the first pawl 510 can stretch the tension spring, so that the knob 120 can be in transmission connection with the first pawl 510, and the spring 130 is driven to wind on the rotating shaft 110. When the rotation of the driving knob 120 is stopped and the clockwork spring 130 is loosened, the tension spring cannot be compressed by the first pawl 510, so that the tension spring can limit the rotation position of the first pawl 510, and further the first pawl 510 can limit the first external tooth portion 122 to rotate along the direction in which the clockwork spring 130 is loosened, and further the knob 120 can only rotate along the direction in which the clockwork spring 130 is wound, and therefore the stability and the reliability of the mechanical energy stored in the power mechanism 100 are improved.

Wherein the tension spring bears axial tension. When not under load, the two adjacent rings of the tension spring are tightly spaced and there is no gap.

The transmission mechanism 200 may transmit through a combination of a worm gear, a lead screw nut, or a rack and pinion 220, and only needs to receive the mechanical energy of the power mechanism 100 and drive the pushing mechanism 300 to move.

As shown in fig. 8 and 9, in one embodiment, the transmission mechanism 200 includes a first gear 210 and a rack 220 disposed along an axial direction of the syringe 1000. The first gear 210 is sleeved on the rotating shaft 110. The first gear 210 is in driving connection with the rack 220. Rack 220 is fixedly connected to bolus mechanism 300. So, drive first gear 210 through pivot 110 and rotate for first gear 210 can drive rack 220 and remove along the axial direction of syringe 1000, and then can drive and move along the axial direction of syringe 1000 with rack 220 fixed connection's injection mechanism 300 in step, thereby has improved injection mechanism 300 and has pushed syringe 1000 to carry out the reliability and the stability of injecting. In addition, the gear and rack 220 is engaged to drive, so that the injection device 10 has a simple structure, low cost and convenient carrying and maintenance.

The rack 220 is fixedly connected with the injection mechanism 300, and may be clamped, inserted, glued, screwed or otherwise fixedly connected, or the rack 220 and the injection mechanism 300 are integrally formed.

As shown in fig. 9, an end of the rack 220 away from the first gear 210 is further provided with a idle rotation portion 221 so that the first gear 210 can idle after the rack 220 is driven to move to a preset position. Thus, after the rack 220 moves to the preset position, the first gear 210 and the idle rotation part 221 are correspondingly arranged, so that the first gear 210 can idle and release the redundant mechanical energy of the power mechanism 100, thereby preventing the syringe 1000 from being damaged due to the further movement of the injection mechanism 300, and facilitating the taking and placing of the syringe 1000.

To facilitate access to the syringe 1000.

As shown in fig. 4, 8 and 9, in one embodiment, the bolus mechanism 300 further includes a clutch mechanism 600 drivingly connected to both the first gear 210 and the speed change mechanism 400. The clutch mechanism 600 is used to disconnect or connect the power transmission path between the transmission mechanism 400 and the first gear 210. So, when pushing injection mechanism 300 and pushing syringe 1000 and injecting, connect the power transmission route between speed change mechanism 400 and the first gear 210 through clutching mechanism 600 for speed change mechanism 400 can control the rotational speed of first gear 210, and then be connected through first gear 210 and rack 220 transmission, and rack 220 and pushing injection mechanism 300 fixed connection, thereby make pushing injection mechanism 300 can be stable, the slow syringe 1000 that pushes away injects, improved the stability and the security of pushing injection device 10. When the push-in mechanism 300 needs to be driven to move in the direction away from the first gear 210, the power transmission path between the speed change mechanism 400 and the first gear 210 is cut off through the clutch mechanism 600, so that the resistance of the speed change mechanism 400 to the first gear 210 can be reduced by the clutch mechanism 600, and the push-in mechanism 300 is driven to move in the direction away from the first gear 210, so that the injector 1000 can be conveniently taken and put and the injection substance can be conveniently extracted.

As shown in fig. 8, further, the clutch mechanism 600 includes a first transmission member 610 and a second transmission member 620. The second transmission element 620 is provided with an inner toothing 621 and a second outer toothing 622. The second external toothing 622 is in driving connection with the gear shifting mechanism 400. The first transmission element 610 is in driving connection with the first gear wheel 210. The first transmission member 610 is disposed through the inner teeth 621 such that when the first transmission member 610 rotates in a first direction (as shown in the direction B in fig. 8), the first transmission member 610 is engaged with the inner teeth 621 and rotates synchronously. When the first transmission member 610 rotates in the second direction (as shown in the direction C in fig. 8), the first transmission member 610 is in an idle state. Thus, the first transmission element 610 is in transmission connection with the first gear 210 and the second transmission element 620 is in transmission connection with the speed change mechanism 400, so that the clutch mechanism 600 can be ensured to be stably and reliably transmitted with the first gear 210 and the speed change mechanism 400, and the reliability and stability of the injection device 10 are improved. In addition, the first transmission element 610 is engaged with the inner teeth 621 for transmission or the first transmission element 610 idles, so that the first transmission element 610 can cut off or connect a power transmission path between the first gear 210 and the second transmission element 620, and further, the push injection mechanism 300 is driven to move in a direction away from the first gear 210, thereby facilitating taking and placing of the syringe 1000 and extracting the injection substance.

The first transmission element 610 and the second transmission element 620 are both rotatably connected to the first housing 800. The second transmission element 620 can also be limited by the cooperation of the first transmission element 610, the first gear 210 and the speed change gear set 440.

Wherein the second transmission element 620 may be a transmission ring or a transmission sleeve. The internal tooth 621 may be an internal gear formed by a plurality of teeth spaced apart on the inner sidewall of the second transmission element 620. The second external tooth 622 may be an external tooth formed by a plurality of teeth spaced apart on the outer sidewall of the second transmission element 620.

The first transmission element 610 may be a combination of a pawl and a gear, or a combination of a one-way bearing and two gears, and it is only necessary that when the first transmission element 610 rotates in the first direction, the first transmission element 610 is engaged with the internal tooth portion 621 and rotates synchronously, and when the first transmission element 610 rotates in the second direction, the first transmission element 610 is in an idle rotation state.

Specifically, the first transmission element 610 includes a second gear 611 and a second pawl 612 fixedly coupled to the second gear 611. The second gear 611 is in driving connection with the first gear 210. The second pawl 612 is disposed within the internal tooth 621 such that when the second pawl 612 rotates in a first direction, the second pawl 612 meshes with and rotates synchronously with the internal tooth 621. When the second pawl 612 rotates in the second direction, the second pawl 612 is in a freewheeling state. In this way, the second pawl 612 is in meshing transmission with the internal tooth portion 621 or the second pawl 612 idles, so that the second pawl 612 can cut off or connect a power transmission path between the first gear 210 and the internal tooth portion 621, and then the push injection mechanism 300 is driven to move in a direction away from the first gear 210, thereby facilitating taking and placing of the syringe 1000.

The second pawl 612 and the second gear 611 are fixedly connected, and may be connected by clamping, inserting, welding or the like, or may be integrally formed with the second pawl 612 and the second gear 611.

The number of the second pawls 612 can be flexibly adjusted according to actual use requirements, for example, the number of the second pawls 612 can be one, two, or three. The second pawl 612 may be made of elastic material such as rubber or plastic, and only when the second pawl 612 rotates along the first direction, the second pawl 612 is engaged with the inner tooth portion 621 and rotates synchronously, and when the second pawl 612 rotates along the second direction, the second pawl 612 is in an idle rotation state.

Here, transmission mechanism 400 may be a combination of transmission gear set 440, escapement, and balance 410, or a combination of transmission gear set 440 and a continuously rotatable flywheel, and the movement speed of bolus mechanism 300 may be controlled by transmission mechanism 400.

As shown in fig. 9, in one embodiment, the shifting mechanism 400 includes a balance 410 for generating a fixed frequency, a pallet 420 rotationally coupled to the balance 410, an escape wheel 430 geared to the pallet 420, and a gear train 440 geared to the escape wheel 430. The speed change gear set 440 is in driving connection with the transmission mechanism 200. Variable speed gear set 440 is used to control the speed of movement of bolus mechanism 300. Therefore, the balance 410 with the fixed frequency drives the escape pinion 420 to swing according to the fixed frequency, so that the escape pinion 420 can drive the escape pinion 430 to rotate corresponding teeth according to the corresponding fixed frequency (namely, the escape pinion 420 swings once every time, the escape pinion 430 rotates one tooth correspondingly), and then the rotating speed of the escape pinion 430 is adjusted by the aid of the speed change gear, meanwhile, the speed change gear is in transmission connection with the escape pinion 430 and the transmission mechanism 200 respectively through the speed change gear box, the transmission mechanism 200 is in transmission connection with the injection mechanism 300, so that the speed change gear set 440 can control the injection mechanism 300 to move at a stable and slow speed, and the stability and the control precision of injecting the injector 1000 by the injection device 10 are improved.

Wherein, the pushing mechanism 300 is further provided with an adjusting member for adjusting the tightness of the balance spring and a fixing rod fixedly connected with the second housing 900. The balance wheel is rotationally connected with the fixed rod, one end of the hairspring, which is close to the fixed rod, is fixedly connected with the fixed rod, the other end of the hairspring, which is far away from the fixed rod, is fixedly connected with the adjusting piece, and the adjusting piece is in sliding connection with the balance wheel, so that the adjusting piece can slide in a reciprocating manner along the radial direction of the balance wheel. In this way, the regulating member is driven to slide back and forth along the radial direction of the balance wheel, so that the radius of the hairspring during winding is adjustable (i.e., the tightness of the hairspring during winding is adjustable). Further, the oscillation period of the balance can be adjusted, so that the moving speed of bolus mechanism 300 can be adjusted, and the applicability of bolus mechanism 300 is improved.

The transmission gear set 440 and the escape wheel 430 are both rotatably connected to the first housing 800. The amount of the rotation speed of the escape wheel and pinion 430 regulated by the speed change gear set 440 can be adjusted or designed according to actual needs. For example, the ratio of the input speed to the output speed of the speed change gear set 440 may be 15:1, 12:1, 10:1, or other ratios. The ratio of the input rotational speed to the output rotational speed of the speed change gear set 440 can be set during the production of the bolus device 10, or can be adjusted during use of the bolus device 10 by providing an adjustment mechanism.

Wherein the speed change gear set 440 includes at least one speed change gear.

Optionally, the transmission gear set 440 includes a first transmission gear 441 and a second transmission gear 442, and the first transmission gear 441 has a first small tooth portion and a first large tooth portion. The second transmission gear 442 has a second small tooth portion and a second large tooth portion. The escape wheel 430 is provided with a third small tooth portion. The first small tooth part is in transmission connection with the second outer tooth part 622, the first large tooth part is in transmission connection with the second small tooth part, and the second large tooth part is in transmission connection with the third small tooth part. In this way, the rotational speed of the escape wheel 430 is adjusted by the first and second speed-changing

gears

441 and 442, so that the bolus mechanism 300 moves at a stable and slow speed, and the stability and control accuracy of the bolus device 10 in injecting the syringe 1000 are improved.

The first transmission gear 441, the second transmission gear 442, and the escape wheel 430 are rotatably connected to the first case 800. The first speed change gear 441, the second speed change gear 442, and the escape wheel 430 may be rotatably connected to the first housing 800 by a structure such as a rotating shaft 110 or a bearing. The gear modules and the numbers of teeth of the first gear 210, the second gear 611, the internal gear 621, the second external gear 622, the first small gear, the first large gear, the second small gear, the second large gear, the third small gear, and the escape wheel 430 can be flexibly adjusted according to actual use requirements.

Alternatively, the first gear 210 has a gear module of 0.5 and a tooth count of 60. The second gear 611 has a gear module of 0.5 and a number of teeth of 10. The second external toothing 622 has a gear module of 0.5 and a number of teeth of 50. The first small tooth part has a gear module of 0.5 and a tooth number of 10. The first large tooth has a gear module of 0.5 and a tooth number of 40. The gear module of the second small tooth part is 0.5, and the number of teeth is 10. The gear module of the second large tooth part is 0.4, and the number of teeth is 30. The gear module of the third small tooth part is 0.4, and the number of teeth is 10. The number of teeth of escape wheel 430 is 20. The frequency of oscillation of the balance is twice per second and the escape wheel 430 is driven to rotate one tooth for each oscillation of the balance. Thus, when the first gear 210 rotates one revolution per hour, the rack 220 in transmission connection with the first gear 210 also drives the bolus mechanism 300 to move by the length of the perimeter of the first gear 210.

To ensure stability during pushing of bolus mechanism 300.

As shown in fig. 10, in an embodiment, the syringe 1000 includes a barrel 1010 and a push rod 1020 slidably engaged with the barrel 1010, the bolus device 10 further includes a fixing mechanism 700 for fixing the barrel 1010 and a second housing for fixing the fixing mechanism 700, the bolus mechanism 300 includes a first sliding portion 310 and an interference portion 320 for interfering with the push rod 1020, the interference portion 320 is disposed at an end of the first sliding portion 310 away from the fixing mechanism 700, and the fixing mechanism 700 is provided with a second sliding portion 710 slidably engaged with the first sliding portion 310, so that the interference portion 320 can push the push rod 1020 to move along a direction machine close to the fixing mechanism 700. In this way, the barrel 1010 is fixed by the fixing mechanism 700, so that the abutting portion 320 can push the push rod 1020 to move in a direction close to the fixing mechanism 700, and further the push rod 1020 can slide relative to the barrel 1010 at a stable and slow speed, thereby ensuring that the injector 1000 can inject at a stable and slow speed.

The second housing 900 and the first housing 800 may be the same housing, or the first housing 800 and the second housing 900 may be mutually matched to form a housing of the bolus injection device 10.

The abutting portion 320 may be a baffle or a stopper, and only needs to be capable of abutting against and cooperating with the push rod 1020 and pushing the push rod 1020 to move along the direction machine close to the fixing mechanism 700.

The first sliding portion 310 may be a sliding plate or a sliding block, and the second sliding portion 710 may be a sliding hole or a sliding rail. The second sliding portion 710 may be disposed at a bottom of the base 720 or a side wall of the base 720, and the first sliding portion 310 may slide back and forth along the second sliding portion 710.

The fixing mechanism 700 fixes the cylinder 1010, and may be clamped, inserted, or fixedly connected. The second housing 900 is fixedly connected to the fixing mechanism 700 by means of a clamping or inserting connection, or by integrally forming the second housing 900 and the fixing mechanism 700.

Further, the fixing mechanism 700 includes a base 720, an upper cover 730 and a locking member 740 for fixedly connecting with the second housing 900. The base 720 is provided with a first groove 721 for mounting the cylinder 1010. One end of the upper cover 730 is hinged to one end of the base 720, and the other end of the upper cover 730 is locked to the other end of the base 720 by the locking member 740, so that the upper cover 730 and the base 720 are matched to fix the cylinder 1010. Thus, the barrel 1010 and the fixing mechanism 700 are more reliably fixed, so that the stability of the pushing process of the pushing mechanism 300 is ensured.

The locking member 740 can be fastened, inserted or screwed, and the upper cover 730 can be engaged with the base 720 to fix the cylinder 1010.

Optionally, the limiting element includes an elastic latch disposed on the base 720, and the upper cover 730 is correspondingly disposed with a second groove 721 matched with the elastic latch for locking. Thus, the elastic latch is locked and matched with the second groove 721, so that the base 720 and the upper cover 730 are fixedly connected and the cylinder 1010 is fixed, and the operation is simple and convenient.

Optionally, securing mechanism 700 is also provided with side slots 722 for placing the two ears of barrel 1010. Thus, the reliability of the fixed connection between the fixing mechanism 700 and the cylinder 1010 is improved.

In one embodiment, an injection device is further provided, the injection device includes the injector 1000 and the above-mentioned injector 10, and the injector 10 is used for pushing the injector 1000 to perform injection. So, promote syringe 1000 through injection device 10 and carry out automatic continuous injection, and then make injection equipment can satisfy the user demand of short-term medicine injection, and simple structure, low in production cost and convenient operation.

In addition, other benefits of the injection device are the same or similar to those of the above-described bolus assembly 10 and will not be described further herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

It should also be understood that in explaining the connection relationship or the positional relationship of the elements, although not explicitly described, the connection relationship and the positional relationship are interpreted to include an error range which should be within an acceptable deviation range of a specific value determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, without limitation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A bolus device, comprising:

2. The injection device as claimed in claim 1, wherein the power mechanism includes a rotation shaft for driving connection with the transmission mechanism, a knob having a receiving cavity, and a spring disposed in the receiving cavity, wherein one end of the rotation shaft away from the transmission mechanism is rotatably disposed in the receiving cavity and fixedly connected to one end of the spring, and the other end of the spring is fixedly connected to an inner sidewall of the receiving cavity, so that the spring can be wound to store mechanical energy and can be unwound to release the mechanical energy, thereby driving the rotation shaft to rotate.

3. The bolus device of claim 2 wherein an outer sidewall of the knob is provided with a first external tooth portion, the bolus device further comprising a limiting mechanism engaged with the first external tooth portion for limiting rotation of the knob in a direction in which the clock spring is released.

4. The bolus device of claim 3, further comprising a first housing, wherein the limiting mechanism comprises a limiting member and a first pawl rotatably coupled to the first housing, wherein one end of the first pawl is engaged with the first external tooth portion, and the limiting member is configured to limit a rotational position of the first pawl, such that the first pawl can limit the first external tooth portion from rotating in a direction in which the power spring is released.

5. The injection device of claim 2, wherein the transmission mechanism comprises a first gear and a rack disposed along an axial direction of the injector, the first gear is sleeved on the rotating shaft, the first gear is in transmission connection with the rack, and the rack is fixedly connected with the injection mechanism.

6. The injector device according to claim 5, wherein an end of the rack away from the first gear is provided with a idle rotation portion so that the first gear can idle after driving the rack to move to a preset position.

7. The bolus device of claim 5, wherein the bolus mechanism further comprises a clutch mechanism drivingly connected to both the first gear and the speed change mechanism, the clutch mechanism being configured to disconnect or connect a power transmission path between the speed change mechanism and the first gear.

8. The infusion device as claimed in claim 7, wherein the clutch mechanism includes a first transmission element and a second transmission element, the second transmission element has an inner tooth portion and a second outer tooth portion, the second outer tooth portion is in transmission connection with the speed change mechanism, the first transmission element is in transmission connection with the first gear, the first transmission element is disposed through the inner tooth portion, such that when the first transmission element rotates along a first direction, the first transmission element is engaged with the inner tooth portion and rotates synchronously, and when the first transmission element rotates along a second direction, the first transmission element is in an idle rotation state.

9. The injector device of claim 8, wherein the first transmission element comprises a second gear and a second pawl fixedly connected to the second gear, the second gear is in transmission connection with the first gear, the second pawl is disposed in the inner tooth portion such that the second pawl meshes with the inner tooth portion and rotates synchronously when the second pawl rotates in a first direction, and the second pawl is in an idle state when the second pawl rotates in a second direction.

10. The bolus device of any one of claims 1 to 9, wherein the variable speed mechanism comprises a balance with a balance spring for generating a fixed frequency, a pallet rotationally connected to the balance with a spring, an escape wheel engaged with the pallet, and a variable speed gear set engaged with the escape wheel, the variable speed gear set being drivingly connected to the drive mechanism, the variable speed gear set being configured to control a movement speed of the bolus mechanism.

11. The injection device according to any one of claims 1 to 9, wherein the injector comprises a barrel and a push rod slidably engaged with the barrel, the injection device further comprises a fixing mechanism for fixing the barrel and a second housing for fixing the fixing mechanism, the injection mechanism comprises a first sliding portion and an abutting portion for abutting against the push rod, the abutting portion is disposed at an end of the first sliding portion away from the fixing mechanism, and the fixing mechanism is provided with a second sliding portion slidably engaged with the first sliding portion, so that the abutting portion can push the push rod to move in a direction close to the fixing mechanism.

12. An injection device comprising a syringe and a bolus as claimed in any one of claims 1 to 11 for propelling the syringe for injection.