阅读说明：本技术 一种危重症新生儿诊疗护理用的流食喂养装置 (Liquid food feeding device for diagnosis and treatment nursing of critically ill neonate ) 是由 彭粤铭 燕旭东 丁璐 方安帅 吴纯婉 邢瑞瑞 庄少玲 于 2021-07-09 设计创作，主要内容包括：本发明公开了一种危重症新生儿诊疗护理用的流食喂养装置,涉及医疗技术领域,包括相连的壳体以及流食筒,所述流食筒内滑动设置有活塞,还包括：轴杆,其转动连接在所述壳体上；传动组件,其用于将轴杆的转动转化为所述活塞的滑动；转动盘,其共轴转动设置于所述轴杆或壳体上；第一棘轮,其共轴固定设置于所述轴杆上；第二棘轮,其共轴转动连接于所述转动盘、轴杆或壳体上；换向组件,其用于将第二棘轮的转动转化为轴杆的逆向转动；动力切换机构,其包括滑动座、第一棘爪、第二棘爪、压簧以及操作组件；扳机,通过按压扳机使转动盘转动。本发明活塞的吸食行程和注射行程均通过按压扳机实现,操作方便省力,且喂食量和喂食速度容易把握。(The invention discloses a liquid diet feeding device for the diagnosis and treatment and nursing of critically ill neonates, which relates to the technical field of medical treatment, and comprises a shell and a liquid diet cylinder which are connected, wherein a piston is arranged in the liquid diet cylinder in a sliding way, and the liquid diet feeding device also comprises: a shaft rotatably connected to the housing; a transmission assembly for converting rotation of the shaft into sliding movement of the piston; a rotating disk coaxially rotatably disposed on the shaft or the housing; the first ratchet wheel is coaxially and fixedly arranged on the shaft rod; the second ratchet wheel is coaxially and rotatably connected to the rotating disc, the shaft lever or the shell; the reversing assembly is used for converting the rotation of the second ratchet wheel into the reverse rotation of the shaft rod; the power switching mechanism comprises a sliding seat, a first pawl, a second pawl, a pressure spring and an operation assembly; and a trigger for rotating the rotary disk by pressing the trigger. The suction stroke and the injection stroke of the piston are realized by pressing the trigger, the operation is convenient and labor-saving, and the feeding amount and the feeding speed are easy to control.)

1. The utility model provides a critical neonate diagnoses liquid food feeding device of nursing usefulness, includes casing and a liquid food section of thick bamboo that links to each other, it is provided with the piston to slide in the liquid food section of thick bamboo, the sliding stroke of piston is including inhaling food stroke and injection stroke, its characterized in that still includes:

a shaft rotatably connected to the housing;

a transmission assembly for converting rotation of the shaft into sliding movement of the piston;

a rotating disk coaxially rotatably disposed on the shaft or the housing;

the first ratchet wheel is coaxially and fixedly arranged on the shaft rod;

the second ratchet wheel is coaxially and rotatably connected to the rotating disc, the shaft lever or the shell;

the reversing assembly is used for converting the rotation of the second ratchet wheel into the reverse rotation of the shaft rod;

the power switching mechanism comprises a sliding seat, a first pawl, a second pawl, a pressure spring and an operation assembly, wherein the first pawl and the second pawl are arranged on the sliding part in a collinear sliding manner, the pressure spring is arranged between the first pawl and the second pawl, the first pawl can be matched with a first ratchet wheel in a clamping manner, the second pawl can be matched with a second ratchet wheel in a clamping manner, and the operation assembly is used for driving the sliding seat to move along the radial direction of a rotating disc so that the first pawl is clamped with the first ratchet wheel or the second pawl is clamped with the second ratchet wheel;

the trigger is fixedly connected to the rotating disc, the rotating disc is rotated by pressing the trigger, and the first ratchet wheel or the second ratchet wheel is driven to rotate by the power switching mechanism;

and the elastic unit is used for driving the trigger to reset.

2. The liquid food feeding apparatus as claimed in claim 1, wherein the transmission assembly comprises a first gear coaxially and fixedly disposed on the shaft, and a rack gear coaxially and fixedly connected to the piston at one end thereof, the rack gear being engaged with the first gear.

3. The liquid food feeding device as claimed in claim 1, wherein the transmission assembly comprises a worm, a worm wheel and a first screw rod, the worm is coaxially and fixedly connected with the shaft rod, one end of the first screw rod is coaxially and fixedly connected with the piston, a threaded hole is formed in the center of the worm wheel, the worm wheel is in threaded connection with the first screw rod through the threaded hole, and the worm wheel is meshed with the worm.

4. The liquid food feeding apparatus as claimed in claim 1, wherein the second ratchet wheel has a ring-shaped configuration, and the respective ratchet teeth are provided on an inner peripheral side of the ring-shaped configuration.

5. The liquid food feeding apparatus as claimed in claim 1, wherein the reversing assembly comprises an inner gear ring coaxially and fixedly connected to the second ratchet wheel, a second gear coaxially and fixedly disposed on the shaft, and a third gear rotatably connected to the housing, wherein the third gear is meshed with the inner gear ring and the second gear.

6. The liquid food feeding apparatus as claimed in claim 1, wherein the rotating plate is annular, a through hole is formed in the rotating plate along a radial direction, a groove is formed in the rotating plate and located in the through hole, the power switching mechanism is movably disposed in the groove, the first pawl can pass through the through hole to be engaged with the first ratchet wheel, and the second pawl can pass through the through hole to be engaged with the second ratchet wheel.

7. The liquid food feeding apparatus as claimed in claim 1, wherein the operating member comprises a chute, a slanting rod, an L-shaped connecting rod, a second screw rod and a rotating handle, the guiding chute is disposed on the sliding portion, the slanting rod is slidably disposed in the chute, the second screw rod is screwed to the housing, the second screw rod is coaxial with the rotating disk, one end of the L-shaped connecting rod is fixedly connected to the slanting rod, the other end of the L-shaped connecting rod is rotatably connected to one end of the second screw rod, and the other end of the L-shaped connecting rod is fixedly connected to the rotating handle.

8. Liquid food feeding apparatus according to claim 1, wherein the resilient unit is a spring or a torsion spring.

Technical Field

The invention relates to the technical field of medical treatment, in particular to a liquid food feeding device for diagnosis and treatment and nursing of critically ill neonates.

Background

Critically ill newborns often cannot feed themselves during treatment and need to be injected with nutritional liquids or fed through a fluid-fed feeding device.

As CN209172966U, the granted announcement date is 2019, 7 and 30 days, and the name is "a liquid diet booster", which comprises a hose, wherein the bottom of the hose is connected with an occlusion part, the bottom of the occlusion part is connected with a connecting pipe, the bottom of the connecting pipe is connected with an upper cover, the bottom of the upper cover is connected with a liquid diet cylinder, the surface of the liquid diet cylinder is carved with scale marks, the bottom of the liquid diet cylinder is connected with a lower cover, one side of the lower cover is connected with a fixed cylinder, a fixed plate is connected between the fixed cylinder and the lower cover, a squeezing plate is arranged inside the liquid diet cylinder, one side of the squeezing plate is connected with a connecting column, the surface of the connecting column is provided with threads, one end of the connecting pipe is provided with a pressing plate, the hose is communicated with the liquid diet cylinder, the fixed cylinder is hollow and is communicated with the liquid diet cylinder, so that a patient can be fed. Further, patent applications CN109011121A and CN111297695A both disclose a liquid diet boosting and feeding device for medical use.

Among the prior art, what critically ill neonate generally used when diagnosing and nursing is the class syringe structure or the liquid food boost motor of large capacity, medical staff generally directly make the liquid food section of thick bamboo inhale the liquid food through the core bar pulling piston, then directly push the liquid food in the piston will flow the food section of thick bamboo through the core bar and squeeze into neonate's esophagus through the hose in, have obvious defect: one is that the liquid diet is different from pure liquid, the liquid diet has stronger viscosity, and both the liquid diet is sucked into the liquid diet cylinder and the liquid diet is ejected from the liquid diet cylinder, which is relatively laborious; secondly, because the critical neonate is very fragile, the feeding speed and the feeding amount are difficult to accurately control, the critical neonate is easy to cause secondary damage, for example, the particle size and the viscosity of the liquid diet are not uniform, when the feeding is carried out, the liquid diet with larger liquid diet particles or larger viscosity blocks or partially blocks the outlet or the hose of the liquid diet, the resistance for pushing the piston is inevitably larger, the feeding personnel needs to push the piston harder, the hidden trouble exists in the moment that the outlet or the hose of the liquid diet is unobstructed, the feeding personnel often have no time to take the force, a large amount of liquid diet is injected into the esophagus of the neonate in the moment, and the neonate is injured again.

Disclosure of Invention

The invention aims to provide a liquid food feeding device for diagnosis and treatment and nursing of critically ill neonates, which aims to overcome the defects in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a severe neonate diagnoses liquid food feeding device of nursing usefulness, includes casing and liquid food section of thick bamboo that link to each other, it is provided with the piston to slide in the liquid food section of thick bamboo, the slip stroke of piston is including inhaling food stroke and injection stroke, still includes axostylus axostyle, drive assembly, rolling disc, first ratchet, second ratchet, switching-over subassembly, power switching mechanism, trigger and elastic unit, wherein, the axostylus axostyle rotates to be connected on the casing, drive assembly is used for turning into the rotation of axostylus axostyle the slip of piston, the rolling disc coaxial rotation set up in on axostylus axostyle or casing, first ratchet is coaxial fixed set up in on the axostylus axostyle, second ratchet coaxial rotation connect in on rolling disc, axostylus axostyle or casing, the switching-over subassembly is used for turning into the reverse rotation of axostylus axostyle with the rotation of second ratchet, power switching mechanism includes that the seat, First pawl, second pawl, pressure spring and operating element, first pawl slides with the second pawl collineation and sets up on the sliding part, the pressure spring sets up between first pawl and second pawl, first pawl can cooperate with first ratchet joint, the second pawl can cooperate with second ratchet joint, operating element is used for the drive the sliding seat is along rotating the dish radial movement so that first pawl and first ratchet joint or make second pawl and second ratchet joint, trigger fixed connection makes the rolling disc rotate through pressing the trigger to drive first ratchet or second ratchet through power switching mechanism and rotate, elastic element is used for driving the trigger and resets.

Further, the transmission assembly comprises a first gear and a rack, the first gear is coaxially and fixedly arranged on the shaft rod, one end of the rack is coaxially and fixedly connected with the piston, and the rack is meshed with the first gear.

Further, the transmission assembly comprises a worm, a worm wheel and a first screw rod, the worm is coaxially and fixedly connected with the shaft rod, one end of the first screw rod is coaxially and fixedly connected with the piston, a threaded hole is formed in the center of the worm wheel, the worm wheel is in threaded connection with the first screw rod through the threaded hole, and the worm wheel is meshed with the worm.

Further, the second ratchet wheel is of an annular structure, and each ratchet of the second ratchet wheel is arranged on the inner peripheral side face of the annular structure.

Furthermore, the reversing assembly comprises an inner gear ring, a second gear and a third gear, the inner gear ring is coaxially and fixedly connected to the second ratchet wheel, the second gear is coaxially and fixedly arranged on the shaft rod, the third gear is rotatably connected to the shell, and the third gear is meshed with the inner gear ring and the second gear simultaneously.

Furthermore, the rotating disc is annular, a through hole is formed in the rotating disc along the radial direction, a groove located on the through hole is formed in the rotating disc, the power switching structure is movably arranged in the groove, the first pawl can penetrate through the through hole to be matched with the first ratchet wheel, and the second pawl can penetrate through the through hole to be matched with the second ratchet wheel.

Further, the operation subassembly includes chute, down tube, L shape connecting rod, second screw rod and changes the handle, the direction chute sets up on the sliding part, the down tube slides and sets up in the chute, second screw rod threaded connection is on the casing, and the second screw rod is coaxial with the rolling disc, the one end and the down tube fixed connection of L shape connecting rod, the other end rotate the internal connection with the one end of second screw rod, the other end fixedly connected with of second screw rod changes the handle.

Further, the elastic unit is a spring or a torsion spring.

In the technical scheme, the liquid food feeding device for the diagnosis and treatment nursing of the critically ill neonate can selectively enable the rotating disc to drive the first ratchet wheel or the second ratchet wheel to rotate through the power switching mechanism, if the rotating disc drives the first ratchet wheel to rotate by pressing the trigger, the first ratchet wheel drives the shaft rod to rotate clockwise, the shaft rod can drive the piston to perform an injection stroke by the clockwise rotation of the transmission assembly, if the rotating disc drives the second ratchet wheel to rotate by pressing the trigger, the shaft rod can be driven to rotate reversely by the second ratchet wheel, the piston can be driven to perform a suction stroke by the reverse rotation of the shaft rod by the transmission assembly, and in the resetting process of the elastic unit driving trigger, the rotating disc cannot drive any one of the first ratchet wheel and the second ratchet wheel to rotate, namely, the rotating disc idles; so, the suction stroke and the injection stroke of piston are all realized through pressing the trigger, and convenient operation is laborsaving, and feeds the food volume and feeds the easy assurance of food speed.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic diagram of an overall structure provided in an embodiment of the present invention;

FIG. 2 is a top view of the overall structure provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2 according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view taken along line C-C of FIG. 2 according to an embodiment of the present invention;

FIG. 6 is an enlarged view of the structure of FIG. 2 at D according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a transmission assembly and a reversing assembly according to an embodiment of the present invention;

FIG. 8 is a schematic view of a partial structure inside the housing according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a transmission assembly according to another embodiment of the present invention;

fig. 10 is an exploded view of the overall structure provided by the embodiment of the present invention.

Description of reference numerals:

1. a housing; 2. a liquid food cartridge; 3. a piston; 4. a shaft lever; 5. a transmission assembly; 5.1, a first gear; 5.2, a rack; 5.3, a worm; 5.4, a worm gear; 5.5, a first screw; 6. rotating the disc; 7. a first ratchet wheel; 8. a second ratchet wheel; 9. a commutation assembly; 9.1, an inner gear ring; 9.2, a second gear; 9.3, a third gear; 10. a power switching structure; 10.1, a sliding seat; 10.2, a first pawl; 10.3, a second pawl; 10.4, a pressure spring; 10.5, operating the components; 10.51, a chute; 10.52, a diagonal rod; 10.53, an L-shaped connecting rod; 10.54, a second screw; 10.55, rotating the handle; 11. a trigger.

Detailed Description

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 1-10, the liquid diet feeding device for critical neonatal care includes a housing 1 and a liquid diet cylinder 2 connected to each other, a piston 3 is slidably disposed in the liquid diet cylinder 2, a sliding stroke of the piston 3 includes a sucking stroke and an injecting stroke, a shaft lever 4, a transmission assembly 5, a rotating disc 6, a first ratchet 7, a second ratchet 8, a reversing assembly 9, a power switching mechanism, a trigger 11, and an elastic unit, wherein the shaft lever 4 is rotatably connected to the housing 1, the transmission assembly 5 is configured to convert a rotation of the shaft lever 4 into a sliding of the piston 3, the rotating disc 6 is coaxially and rotatably disposed on the shaft lever 4 or the housing 1, the first ratchet 7 is coaxially and fixedly disposed on the shaft lever 4, the second ratchet 8 is coaxially and rotatably connected to the rotating disc 6, the shaft lever 4 or the housing 1, the reversing assembly 9 is configured to convert a rotation of the second ratchet 8 into a reverse rotation of the shaft lever 4, the power switching mechanism comprises a sliding seat 10.1, a first pawl 10.2, a second pawl 10.3, a pressure spring 10.4 and an operating assembly 10.5, wherein the first pawl 10.2 and the second pawl 10.3 are arranged on the sliding part in a collinear sliding manner, the end parts of the first pawl 10.2 and the second pawl 10.3 which are separated from each other are inclined planes, the pressure spring 10.4 is arranged between the first pawl 10.2 and the second pawl 10.3, the first pawl 10.2 can be in clamping fit with a first ratchet wheel 7, the second pawl 10.3 can be in clamping fit with a second ratchet wheel 8, the operating assembly 10.5 is used for driving the sliding seat 10.1 to move along one radial direction of the rotating disc 6 so as to enable the first pawl 10.2 to be in clamping fit with the first ratchet wheel 7 or enable the second pawl 10.3 to be in clamping fit with the second ratchet wheel 8, and a trigger 11 is fixedly connected to the rotating disc 6, the rotating disc 6 is rotated by pressing the trigger 11 to drive the first ratchet wheel 7 or the second ratchet wheel 8 to rotate through the power switching mechanism, and the elastic unit is used for driving the trigger 11 to reset.

Specifically, the liquid diet cylinder 2 and the shell 1 are detachably connected, such as in threaded connection and clamping connection, so that the liquid diet cylinder 2 can be detached from the shell 1 for cleaning after feeding is finished, a liquid diet outlet is formed in one end, far away from the shell 1, of the liquid diet cylinder 2, the liquid diet outlet is inserted into prepared liquid diet, and the liquid diet can be sucked into the liquid diet cylinder 2 by sliding the piston 3 along a suction stroke; and one end of the hose is communicated with the liquid food outlet, the other end of the hose is inserted into the esophagus of the neonate, and the piston 3 slides along the feeding stroke, so that the liquid food in the liquid food cylinder 2 can be injected into the esophagus of the neonate. The liquid food barrel 2 is connected with the shell 1 and then is gun-shaped in overall shape, a handle is arranged on the shell 1, the trigger 11 is pressed towards the handle to enable the rotating disc 6 to rotate, the elastic unit is preferably a spring or a torsion spring, the trigger 11 is reset through the elastic force of the elastic unit, the trigger 11 moves towards the direction far away from the handle, in the reciprocating motion process of the trigger 11, the motion path of the trigger 11 swings, and the center of the swing is the axis of the rotating disc 6.

During transmission assembly 5 was inputed to 4 rotations of axostylus axostyle, transmission assembly 5 turned into rectilinear motion and exported piston 3 with 4 rotations of axostylus axostyle to realize 4 rotations of axostylus axostyle and can make piston 3 slide, 4 cistrons of axostylus axostyle, drive piston 3 carries out the injection stroke, 4 reversals of axostylus axostyle, and drive piston 3 inhales the stroke. Referring to fig. 7, the transmission assembly 5 includes a first gear 5.1 and a rack 5.2, the first gear 5.1 is coaxially and fixedly disposed on the shaft rod 4, one end of the rack 5.2 is coaxially and fixedly connected to the piston 3, the rack 5.2 is engaged with the first gear 5.1, when the shaft rod 4 rotates, the first gear 5.1 is driven to rotate, the first gear 5.1 drives the rack 5.2 engaged therewith to make a linear motion, and further, the piston 3 is driven to slide by the rack 5.2.

Referring to fig. 3-6, the rotating disc 6 is ring-shaped, a through hole is formed in the rotating disc 6 along a radial direction, a groove is formed in the rotating disc 6 and located in the through hole, the power switching structure 10 is movably disposed in the groove, the first pawl 10.2 and the second pawl 10.3 are slidably disposed in the through hole, so that the sliding seat 10.1 can slide along the radial direction of the rotating disc 6, the rotating disc 6 can drive the power switching mechanism to rotate, when the sliding seat 10.1 is moved in the axial direction of the rotating disc 6 to enable the first pawl 10.2 to pass through the through hole to be in snap-fit with the first ratchet 7, the second pawl 10.3 retreats into the through hole, the second pawl 10.3 is not in fit with the second ratchet 8, the trigger 11 is pressed to enable the rotating disc 6 to rotate forward to drive the first ratchet 7 and the shaft lever 4 to rotate forward, but the elastic unit drives the ratchet 11 to reset to enable the rotating disc 6 to rotate backward, after the first pawl 10.2 contacts and extrudes with the first ratchet 7, the first pawl 10.2 overcomes the elasticity of the pressure spring 10.4 and retreats into the through hole, and is not matched with the first ratchet wheel 7 any more, and the rotating disc 6 idles; when the sliding seat 10.1 is moved in the direction far away from the axis of the rotating disc 6 to enable the second pawl 10.3 to penetrate through the through hole to be in clamping fit with the second ratchet wheel 8, the first pawl 10.2 retreats into the through hole, the first pawl 10.2 is not matched with the first ratchet wheel 7, the rotating disc 6 rotates clockwise to drive the second ratchet wheel 8 to rotate clockwise, but when the rotating disc 6 rotates reversely, the second pawl 10.3 is in contact with and extrudes the ratchets of the second ratchet wheel 8, the second pawl 10.3 retreats into the through hole by overcoming the elasticity of the pressure spring 10.4 and is not matched with the second ratchet wheel 8 any more, and the idle rotation of the rotating disc 6 is realized.

As a further preferable technical solution of the present embodiment, referring to fig. 4 and 10, the operation assembly 10.5 includes a chute 10.51, an inclined rod 10.52, an L-shaped connecting rod 10.53, a second screw rod 10.54 and a rotating handle 10.55, the guiding chute 10.51 is disposed on the sliding portion, the inclined rod 10.52 is slidably disposed in the chute 10.51, the second screw rod 10.54 is threadedly coupled to the housing 1, the second screw rod 10.54 is coaxial with the rotating disk 6, one end of the L-shaped connecting rod 10.53 is fixedly connected to the inclined rod 10.52, the other end is rotatably connected to one end of the second screw rod 10.54, the other end of the second screw rod 10.54 is fixedly connected to the rotating handle 10.55, the second screw rod 10.54 is threadedly engaged with the housing 1, the inclined rod 10.52 connected to the second screw rod 10.54 by the L-shaped rod can move along the axial direction of the screw rod, the inclined rod 10.52 is further slidably engaged with the chute 10.51 to move the sliding seat 10.51, and the pawl 10.2 is thereby moving the first pawl 10.51, and the pawl 2 is moved, The matching between the first ratchet wheels 7 and the matching between the second pawls 10.3 and the second ratchet wheels 8 are switched. Another effect of the operating assembly 10.5 is that the position of the rotating handle 10.55 is on the axis of the rotating disc 6, which does not rotate along with the rotating disc 6, so that the position of the operating rotating handle 10.55 does not change when the feeding person switches power through the power switching mechanism, which is convenient for operation.

As a preferred technical solution of this embodiment, referring to fig. 7, the reversing component 9 includes an inner gear ring 9.1, a second gear 9.2 and a third gear 9.3, the inner gear ring 9.1 is coaxially and fixedly connected to the second ratchet 8, the second gear 9.2 is coaxially and fixedly disposed on the shaft lever 4, the third gear 9.3 is rotatably connected to the housing 1, the third gear is simultaneously engaged with the inner gear ring 9.1 and the second gear 9.2, the second ratchet 8 drives the inner gear ring 9.1 fixedly connected to the second ratchet 8 to rotate in the same direction, the inner gear ring 9.1 drives the third gear 9.3 to rotate in the same direction, and the third gear 9.3 drives the second gear 9.2 and the shaft lever 4 to rotate in the same direction, so that the rotation directions of the second ratchet 8 and the shaft lever 4 are opposite.

In the technical scheme, when fluid food is sucked into the fluid food cylinder 2, the sliding seat 10.1 moves in the direction away from the axis of the rotating disc 6 through the operating assembly 10.5, the sliding seat 10.1 enables the first pawl 10.2 to return to the through hole, namely the first pawl 10.2 is not matched with the first ratchet wheel 7, meanwhile, the second pawl 10.3 is in clamping fit with the second ratchet wheel 8, the elastic force of the pressure spring 10.4 respectively acts on the first pawl 10.2 and the second pawl 10.3, the first pawl 10.2 and the second pawl 10.3 slide on the sliding seat 10.1 to the maximum distance of separation, the trigger 11 is pressed to drive the rotating disc 6 to rotate clockwise, the rotating disc 6 drives the second ratchet wheel 8 to rotate clockwise through the power switching structure 10, the second ratchet wheel 8 enables the second pawl 4 to rotate clockwise through the reversing assembly 9, and the piston shaft rod 3 enters the food sucking stroke through the transmission assembly 5, thereby sucking the liquid food into the liquid food cylinder 2; when the trigger 11 is pressed to the maximum stroke and the trigger 11 is abutted to the handle, the trigger 11 is loosened, the trigger 11 is driven to reset by the elastic force of the elastic unit, the rotating disc 6 rotates reversely in the resetting process of the trigger 11, the second pawl 10.3 is enabled to retreat into the through hole by overcoming the elastic force of the pressure spring 10.4 after being contacted and extruded with the ratchet of the second ratchet wheel 8 and is not matched with the second ratchet wheel 8, and meanwhile, because the first pawl 10.2 is not matched with the first ratchet wheel 7, the rotating disc 6 rotates reversely and cannot drive any one of the first ratchet wheel 7 and the second ratchet wheel 8 to rotate, and the rotating disc 6 idles; the trigger 11 is repeatedly pressed for a plurality of times, and the liquid food can be continuously sucked into the liquid food cylinder 2; when feeding a newborn, the sliding seat 10.1 moves towards the axis direction of the rotating disc 6 through the operation assembly 10.5, the sliding seat 10.1 enables the second pawl 10.3 to return to the through hole, the second pawl 10.3 is not matched with the second ratchet wheel 8, meanwhile, the first pawl 10.2 is in clamping fit with the first ratchet wheel 7, the pressing trigger 11 drives the rotating disc 6 to rotate clockwise, the rotating disc 6 drives the first ratchet wheel 7 to rotate clockwise through the power switching structure 10, the first ratchet wheel 7 enables the shaft lever 4 to rotate clockwise, the shaft lever 4 enables the piston 3 to perform an injection stroke through the transmission assembly 5, and therefore liquid food in the liquid food cylinder 2 is injected into the esophagus of the newborn through the hose; when the trigger 11 is pressed to the maximum stroke, the trigger 11 is loosened, the trigger 11 is driven to reset by the elastic force of the elastic unit, the rotating disc 6 rotates reversely in the resetting process of the trigger 11, the first pawl 10.2 overcomes the elastic force of the pressure spring 10.4 and retreats into the through hole after being contacted and extruded with the ratchet of the first ratchet wheel 7, and is not matched with the first ratchet wheel 7 any more, and meanwhile, because the second pawl 10.3 is not matched with the second ratchet wheel 8, the rotating disc 6 rotates reversely and cannot drive any one of the second ratchet wheel 8 and the first ratchet wheel 7 to rotate, and the rotating disc 6 idles; by repeatedly pressing the trigger 11 several times, the liquid food in the liquid food cartridge 2 can be continuously fed into the esophagus of the newborn. So, the suction stroke and the injection stroke of the piston 3 are realized by pressing the trigger 11, the operation is convenient and labor-saving, and the feeding amount and the feeding speed are easy to be grasped.

Under the condition that the amplitude and the frequency of the pressing trigger 11 are not changed in the process of sucking the liquid food into the liquid food cylinder 2 and feeding the newborn baby, the reversing component 9 can play an accelerating effect in the process of sucking the liquid food into the liquid food cylinder 2, so that the speed of sucking the liquid food into the liquid food cylinder 2 is higher than the speed of feeding the newborn baby, the effect of fast forward and slow discharging can be achieved, namely the liquid food is sucked into the liquid food cylinder 2 quickly so as to save the time of sucking the liquid food into the liquid food cylinder 2, and the newborn baby is fed at a slow speed so as to protect the newborn baby.

In another embodiment provided by the invention, referring to fig. 9, the transmission assembly 5 includes a worm 5.3, a worm wheel 5.4 and a first screw 5.5, the worm 5.3 is coaxially and fixedly connected with the shaft rod 4, one end of the first screw 5.5 is coaxially and fixedly connected with the piston 3, a threaded hole is formed in the center of the worm wheel 5.4, the worm wheel 5.4 is in threaded connection with the first screw 5.5 through the threaded hole, and the worm wheel 5.4 is meshed with the worm 5.3. The shaft lever 4 drives the worm 5.3 to rotate, the worm 5.3 is matched with the worm wheel 5.4 to enable the worm wheel 5.4 to rotate, the threaded hole of the worm wheel 5.4 is matched with the first screw rod 5.5 to enable the first screw rod 5.5 to linearly move, so that the first screw rod 5.5 can drive the piston 3 to slide in the liquid food cylinder 2, the rotation of the shaft lever 4 is converted into the linear motion of the piston 3, the worm 5.3 of the transmission component 5 drives the worm wheel 5.4 to rotate, the deceleration motion effect is achieved, the injection stroke of the piston 3 is decelerated when a newborn is fed, the esophagus of the newborn is protected effectively, meanwhile, when liquid food is sucked into the liquid food cylinder 2, the frequency of pressing the trigger 11 can be accelerated properly, and therefore, the problem is that the liquid food can not be sucked into the liquid food cylinder 2 rapidly in the sucking process of the piston 3, a liquid food outlet of the liquid food cylinder 2 and the end face of the piston 3 form a negative pressure effect between the worm wheel 5.4 and the worm 5.3, during the resetting of the trigger 11, the piston 3 will not slide back under the influence of the negative pressure which will still continue to suck the liquid food into the liquid food cartridge 2.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.