CN209984720U

CN209984720U - Push rod assembly and high-pressure syringe

Info

Publication number: CN209984720U
Application number: CN201920729061.XU
Authority: CN
Inventors: 王五星; 黄庆金
Original assignee: Shenzhen Ante Medical Ltd By Share Ltd
Current assignee: Shenzhen Ante Medical Ltd By Share Ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-01-24
Anticipated expiration: 2029-05-20

Abstract

The utility model discloses a push rod component and a high-pressure injector, wherein, the push rod component is applied to the high-pressure injector and comprises a rubber plug, and the bottom of the rubber plug is convexly provided with a connecting part; the push rod is provided with a connecting end facing the rubber plug, the end face of the connecting end is provided with two abutting portions, the two abutting portions are arranged oppositely, the connecting portion is fixed between the two abutting portions, and the two abutting portions abut against the bottom of the rubber plug. The technical scheme of the utility model can increase the contact area of push rod and plug, the crooked condition of plug appears when avoiding the push rod to push away the plug.

Description

Push rod assembly and high-pressure syringe

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a push rod component and a high-pressure injector with the same.

Background

In the present piston type high pressure syringe, the end of the push rod is provided with a clamping table, the surface of the bottom of the rubber plug is convexly provided with two buckles arranged at intervals, and the push rod and the rubber plug are inserted between the two buckles through the clamping table to realize the connection with the rubber plug. When the high-pressure injector is used for pushing liquid for injection, the push rod pushes the rubber plug to slide in the needle cylinder so as to eject the liquid medicine from the needle cylinder. Because the push rod only has the terminal surface of card platform and the surperficial butt of plug bottom, the area of contact of push rod and plug is little, and the crooked condition takes place for the plug easily under high pressure state influences the inner wall leakproofness of plug and cylinder, can appear the condition that the medicament in the cylinder was revealed even, safety inadequately.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a push rod assembly, aims at increasing the area of contact of push rod and plug, makes the crooked condition appear in the plug when avoiding the push rod to promote the plug.

In order to achieve the above object, the present invention provides a push rod assembly for a high pressure syringe, including:

the bottom of the rubber plug is convexly provided with a connecting part; and

the push rod is provided with a connecting end facing the rubber plug, the end face of the connecting end is provided with two abutting portions, the two abutting portions are arranged oppositely, the connecting portion is fixed between the two abutting portions, and the two abutting portions abut against the bottom of the rubber plug.

Optionally, the push rod assembly further comprises a clamping mechanism, the clamping mechanism is arranged on the end face of the connecting end and located between the two abutting portions, and the connecting portion is fixed to the clamping mechanism.

Optionally, a slide is formed between the two abutting portions, the clamping mechanism includes two clamping blocks, the two clamping blocks are slidably disposed in the slide, and the two clamping blocks move in opposite directions to clamp the connecting portion.

Optionally, a first sliding groove is formed in the side wall of the sliding way, a sliding block is convexly arranged on the surface, facing the first sliding groove, of the clamping block, and the sliding block is inserted into the first sliding groove.

Optionally, the push rod assembly further comprises a driving assembly, and the driving assembly is arranged in the push rod and connected with the two clamping blocks to drive the two clamping blocks to slide.

Optionally, the push rod includes a rod body with two through ends and an end cover covering one end of the rod body, the two abutting portions are arranged on the surface of the end cover deviating from the rod body, and the driving assembly is installed in the rod body.

Optionally, the driving assembly includes a grooved wheel and two driving pins, the grooved wheel is disposed in the rod body and is disposed opposite to the end cover, two second sliding grooves are disposed on a surface of the grooved wheel facing the end cover, each second sliding groove extends outward along a circumferential direction of the grooved wheel and along a radial direction of the grooved wheel, a yielding groove penetrating through the end cover and extending along an extending direction of the slideway is disposed on a bottom wall of the slideway, one end of each driving pin is inserted into one second sliding groove, and the other end of each driving pin penetrates through the yielding groove and is fixedly connected to one clamping block;

wherein, the grooved wheel rotates to drive the driving pin to slide along the abdicating groove.

Optionally, the driving assembly further includes a driving shaft inserted into the rod body and connected to a surface of the sheave facing away from the end cover, and the driving shaft rotates relative to the rod body to drive the sheave to rotate.

Optionally, the push rod assembly further includes a dust cover, the dust cover is disposed on the two abutting portions, the dust cover is provided with a let position opening, and the connecting portion penetrates through the let position opening and is fixed between the two abutting portions.

The utility model also provides a high pressure syringe, this high pressure syringe, including cylinder and above-mentioned push rod subassembly, push rod subassembly's plug is located in the cylinder, the push rod connect in the bottom of plug.

The utility model discloses technical scheme sets up two relative supporting portions that set up through protruding connecting portion of establishing in the plug bottom, at the terminal surface of the link of push rod to be fixed in connecting portion two and support between the portion. Like this, when using high pressure syringe, the plug is located in high pressure syringe's the cylinder to with the inner wall butt of cylinder, the plug is fixed between two support portions through the connecting portion of bottom, has realized the fixed connection of plug and push rod. When the high-pressure injector injects and pushes liquid, the push rod pushes the rubber plug, the two supporting parts arranged on the end surface of the push rod can be abutted against the bottom of the rubber plug, so that the contact area of the push rod and the rubber plug is increased, the phenomenon that the rubber plug is inclined in the needle cylinder due to the small contact area of the rubber plug and the push rod is avoided, the rubber plug cannot be abutted against the inner wall of the needle cylinder to cause liquid leakage, and the safety of the high-pressure injector is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is an exploded view of the push rod assembly of the present invention;

FIG. 2 is a schematic structural view of the pusher and clamping mechanism of FIG. 1;

FIG. 3 is a further exploded view of the pushrod assembly of FIG. 1;

FIG. 4 is a cross-sectional view of a portion of the construction of the push rod assembly of FIG. 1;

FIG. 5 is a schematic structural view of the end cap of FIG. 3;

figure 6 is a schematic view of the sheave of figure 3;

FIG. 7 is a schematic structural view of the drive shaft of FIG. 3;

fig. 8 is a schematic structural view of the rubber plug in fig. 1.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to 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 addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a push rod assembly 100.

Referring to fig. 1 to 4, in the embodiment of the present invention, the push rod assembly 100 is applied to a high-pressure syringe (not shown), the push rod assembly 100 includes a rubber plug 30, and a connecting portion 33 is protruded from a bottom 31 of the rubber plug 30; and the push rod 10 is provided with a connecting end (marked) facing the rubber plug 30, the end surface of the connecting end is provided with two abutting parts 131, the two abutting parts 131 are oppositely arranged, the connecting part 33 is fixed between the two abutting parts 131, and the two abutting parts 131 abut against the bottom 31 of the rubber plug 30.

The utility model discloses technical scheme sets up two relative settings in the terminal surface of the link of push rod 10 through protruding connecting portion 33 of establishing in plug 30 bottom 31 to be fixed in connecting portion 33 between two support portions 131. Thus, when the high-pressure injector is used, the rubber plug 30 is disposed in the syringe (not shown) of the high-pressure injector and abuts against the inside of the syringe, and the rubber plug 30 is fixed between the two abutting portions 131 through the connecting portion 33 of the bottom portion 31, thereby realizing the fixed connection between the rubber plug 30 and the push rod 10. When the high-pressure injector pushes the liquid, the push rod 10 pushes the rubber plug 30, the two supporting parts 131 arranged on the end surface of the push rod 10 are abutted against the bottom 31 of the rubber plug 30, so that the contact area between the push rod 10 and the rubber plug 30 is increased, the phenomenon that the rubber plug 30 is inclined in the needle cylinder due to the small contact area between the rubber plug 30 and the push rod 10 is avoided, the rubber plug 30 cannot be abutted against the inner wall of the needle cylinder to cause liquid leakage, and the safety of the high-pressure injector is ensured.

The connecting portion 33 may be fixed between the two abutting portions 131 in various embodiments, and a fixing structure (not shown) may be formed between the two abutting portions 131, and the fixing structure may be implemented by a fixing hole provided on the push rod 10 or another fixing structure mounted on the push rod 10. As long as the connecting portion 33 can be fixed between the two abutting portions 131.

Referring to fig. 1 to 4, in an embodiment of the present invention, the push rod assembly 100 further includes a clamping mechanism (not labeled), the clamping mechanism is disposed on the end surface of the connecting end and located between the two supporting portions 131, and the connecting portion 33 is fixed to the clamping mechanism.

The embodiment of the utility model provides an in, set up fixture through two support portions 131 at the terminal surface of link, use this fixture can press from both sides connecting portion 33 tight to the realization is fixed in connecting portion 33 between two liang of support portions 131, fixture can make plug 30 more firm with push rod 10's connection. Further, fixture can be two grip blocks 50, also can be two clamping jaws etc. as long as set up between the portion 131 that supports to it can realize to carry out the centre gripping to connecting portion 33 of plug 30 fixed, and the technical staff can select suitable scheme according to particular case.

In the following, taking the clamping mechanism as two clamping blocks 50 as an example, the scheme of how the clamping mechanism is fixed to the connecting portion 33 is described in detail:

referring to fig. 1 to 4, in an embodiment of the present invention, a slide 133 is formed between the two supporting portions 131, the clamping mechanism includes two clamping blocks 50, the two clamping blocks 50 are slidably disposed in the slide 133, and the two clamping blocks 50 move in opposite directions to clamp the connecting portion 33.

In the embodiment of the present invention, a slide 133 is formed between the two supporting portions 131, and the two clamping blocks 50 slide in the slide 133, it can be understood that the clamping mechanism is disposed between the two supporting portions 131, and the height of the clamping mechanism is slightly lower than the setting of the two supporting portions 131. It should be noted that the surfaces of the two clamping blocks 50 moving toward each other are provided with clamping positions 55, and when the two clamping blocks 50 move toward each other, the two clamping positions 55 approach each other to clamp the connecting portion 33; when the two clamping blocks 50 are moved away from each other, the two clamping sites 55 move away from each other, and the connection 33 can be released. It should be noted that the two clamping blocks 50 may move simultaneously, or one of the clamping blocks 50 may be fixed, and the other clamping block 50 may move relative to the fixed clamping block 50, so that the two clamping positions 55 may move closer to or away from each other to clamp or release the connecting portion 33.

The connecting portion 33 includes a connecting post 331 connected to the bottom portion 31 and a connecting base 333 provided to protrude from an end of the connecting post 331. When the clamping mechanism clamps the fixing connection portion 33, the clamping mechanism is a clamping connection column 331, and the connection table 333 is clamped on the surface of the clamping block 50.

Further, referring to fig. 1 to 3 and 5, in an embodiment of the present invention, a first sliding groove 135 is formed in a side wall of the sliding channel 133, a sliding block 51 is protruded from a surface of the clamping block 50 facing the first sliding groove 135, and the sliding block 51 is inserted into the first sliding groove 135.

The embodiment of the utility model provides an in, through having seted up first spout 135 at the lateral wall of slide 133, the surface of grip block 50 towards first spout 135 is protruding to be equipped with slider 51, and slider 51 inserts and locates in first spout 135, makes the slip of grip block 50 in slide 133 steady. It should be noted that the first sliding groove 135 may be disposed on a side wall of one of the two side walls of the sliding channel 133, and in this case, a surface of the clamping block 50 facing the first sliding groove 135 is convexly provided with a sliding block 51. The first sliding groove 135 may also be disposed on two side walls of the sliding channel 133, and at this time, the sliding blocks 51 are protruded on two surfaces of the clamping block 50 facing the first sliding groove 135, and at this time, the sliding of the clamping block 50 in the sliding channel 133 is more stable.

Further, referring to fig. 3, 4, 6 and 7, in an embodiment of the present invention, the push rod assembly 100 further includes a driving assembly 70, and the driving assembly 70 is disposed in the push rod 10 and connected to the two clamping blocks 50 to drive the two clamping blocks 50 to slide.

In the embodiment of the present invention, the driving assembly 70 is disposed inside the push rod 10, and is connected to the two clamping blocks 50 respectively to drive the two clamping blocks 50 to slide. It should be noted that the driving assembly 70 may be a driving motor disposed inside the push rod 10, or may be a driving cylinder, etc., as long as it is disposed inside the push rod 10 and connected to the two clamping blocks 50 to drive the clamping blocks 50 to slide in the slide way 133, and a technician may select a suitable scheme according to specific situations.

Further, referring to fig. 3, in an embodiment of the present invention, the push rod 10 includes a rod body 11 with two through ends and an end cover 13 covering one end of the rod body 11, the abutting portion 131 is disposed on the surface of the end cover 13 deviating from the rod body 11, and the driving component 70 is installed in the rod body 11.

The embodiment of the utility model provides an in the embodiment scheme, establish push rod 10 into the structure of the body of rod 11 that link up including both ends and the end cover 13 that the body of rod 11 one end was located to the lid, conveniently install drive assembly 70 in push rod 10's inside. It should be noted that the end cap 13 and the rod 11 are detachably connected by a screw.

Further, referring to fig. 3 to 7, in an embodiment of the present invention, the driving assembly 70 includes a grooved pulley 73 and two driving pins 71, the grooved pulley 73 is disposed in the rod 11 and disposed opposite to the end cover 13, two second sliding grooves 731 are disposed on a surface of the grooved pulley 73 facing the end cover 13, each of the second sliding grooves 731 extends along a circumferential direction of the grooved pulley 73 and a radial direction of the grooved pulley 73, a yielding groove 137 penetrating through the end cover 13 and extending along an extending direction of the slideway 133 is disposed on a bottom wall of the slideway 133, one end of each of the driving pins 71 is inserted into one of the second sliding grooves 731, and the other end thereof penetrates through the yielding groove 137 and is fixedly connected to one of the clamping blocks 50; wherein, the grooved wheel 73 rotates to drive the driving pin 71 to slide along the receding groove 137.

The embodiment of the utility model provides an in the scheme, the inside of the body of rod 11 is located to sheave 73, and sheave 73 is the body of rod 11 relatively and rotates, insert the drive pin 71 who locates two second spouts 731 with the drive and rotate, because two second spouts 731 are all along sheave 73 circumference, and along sheave 73 radially outwards extend the setting, when sheave 73 rotates, drive pin 71 rotates along the extending direction of second spout 731, and the grip block 50 of being connected with drive pin 71 can slide in slide 133 under drive pin 71's drive. The forward and reverse rotation of the sheave 73 can drive the two clamping blocks 50 to move toward and away from each other. It should be noted that the surface of the clamping block 50 is provided with a first connecting hole 53 penetrating through the clamping block 50, and the driving pin 71 sequentially passes through the first connecting hole 53 and the abdicating slot 137 and then is inserted into the second sliding slot 731. The second sliding groove 731 arranged on the grooved wheel 73 is used, and the second sliding groove 731 is matched with the driving pin 71 to drive the two clamping blocks 50 to move, so that the moving precision of the two clamping blocks 50 is improved.

Further, referring to fig. 3 to 7, in an embodiment of the present invention, the driving assembly 70 further includes a driving shaft 75, the driving shaft 75 is inserted into the rod 11 and connected to a surface of the sheave 73 facing away from the end cover 13, and the driving shaft 75 rotates relative to the rod 11 to drive the sheave 73 to rotate.

The embodiment of the utility model provides an in the scheme, connect sheave 73 through the transmission of drive shaft 75 to drive sheave 73 just reverse rotation, and then drive two grip blocks 50 and be close to each other and keep away from the motion. It should be noted that the driving shaft 75 is inserted into the rod 11, a mounting hole 751 is disposed on an end surface of the driving shaft 75, a second connection hole 733 penetrating through two opposite surfaces of the sheave 73 is disposed on a surface of the sheave 73, and the sheave 73 is matched with the second connection hole 733 and the mounting hole 751 through a connection member 77. The connecting member 77 may be a connecting bolt or a pin. When the connecting member 77 is a bolt, the second connecting hole 733 and the mounting hole 751 are each provided with a screw thread on an inner wall thereof.

In one embodiment, to facilitate the installation of the pulley 73 and the driving shaft 75, a positioning block 735 is convexly disposed on a surface of the pulley 73 facing the driving shaft 75, a positioning groove 753 is concavely disposed on an end surface of the driving shaft 75, and the positioning block 735 is inserted into the positioning groove 753 to achieve the rapid installation of the pulley 73 and the driving shaft 75.

Further, referring to fig. 3 and 4, in an embodiment, an end of the rod 11 close to the sheave 73 is further provided with a mounting step 111, the bearing 79 is provided on the mounting step 111, and the driving shaft 75 passes through the bearing 79 and is connected with the sheave 73. The bearing 79 is provided to prevent the drive shaft 75 from shifting. Further, in order to prevent the bearing 79 from slipping out, a locking member 78 is further provided on the drive shaft 75, and the locking member 78 is provided between the bearing 79 and the end face of the rod body.

Further, referring to fig. 1 and 2, in an embodiment of the present invention, the push rod assembly 100 further includes a dust cover 90, the dust cover 90 covers two of the supporting portions 131, the dust cover is provided with a position-giving opening 91, and the connecting portion 33 passes through the position-giving opening 91 and is fixed between two of the supporting portions 131.

The embodiment of the utility model provides an in, set up dust cover 90 on holding portion 131 through two, prevent that the dust from getting into inside push rod 10, guarantee the inside clean of push rod 10, avoid push rod 10 to receive the pollution of dust. It should be noted that, when the dust cover 90 is provided, in the liquid pushing process of the high-pressure syringe, the two abutting portions 131 abut against the surface of the dust cover 90, the surface of the dust cover 90 facing away from the push rod 10 abuts against the bottom 31 of the rubber plug 30, and the connecting portion 33 of the rubber plug 30 passes through the position-giving opening 91 and is fixed between the two abutting portions 131.

In one embodiment, the dust cover 90 has a latch 93 protruding from the periphery thereof, and the side wall of the connecting end has a latch 139, the latch 93 is connected to the latch 139, so as to fix the dust cover 90 on the abutting portion of the push rod 10. The utility model also provides a high pressure syringe, this high pressure syringe, including cylinder and above-mentioned push rod subassembly 100, push rod subassembly 100's plug 30 is located in the cylinder, push rod 10 connect in the bottom 31 of plug 30.

The utility model discloses still provide a high pressure syringe, this high pressure syringe include cylinder and push rod assembly 100, and above-mentioned embodiment is referred to this push rod assembly 100's specific structure, because this high pressure syringe has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here. The rubber plug 30 of the push rod assembly 100 is arranged in the needle cylinder and is abutted against the inner wall of the needle cylinder, and the push rod 10 is connected to the bottom 31 of the rubber plug 30, so that in the liquid pushing process of the high-pressure injector, the push rod 10 is ejected out to push the rubber plug 30 to the top end of the needle cylinder from the bottom end of the needle cylinder so as to complete injection of liquid medicine; when the medicine liquid is sucked, the push rod 10 retracts to drive the rubber plug 30 connected with the push rod to pull back the bottom end of the needle cylinder from the top end of the needle cylinder, and the medicine liquid is sucked.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pushrod assembly for use with a high pressure syringe, comprising:

the bottom of the rubber plug is convexly provided with a connecting part; and

2. The push rod assembly as claimed in claim 1, further comprising a clamping mechanism disposed on an end surface of the connecting end and located between the two abutting portions, wherein the connecting portion is fixed to the clamping mechanism.

3. The push rod assembly as claimed in claim 2, wherein a slide is formed between the two abutting portions, the clamping mechanism includes two clamping blocks, the two clamping blocks are slidably disposed in the slide, and the two clamping blocks move in opposite directions to clamp the connecting portion.

4. The push rod assembly as claimed in claim 3, wherein the slide way has a first sliding groove formed in a side wall thereof, and a sliding block is protruded from a surface of the clamping block facing the first sliding groove and inserted into the first sliding groove.

5. The push rod assembly as claimed in claim 3, further comprising a driving assembly, wherein the driving assembly is disposed in the push rod and connected to the two clamping blocks to drive the two clamping blocks to slide.

6. The push rod assembly as claimed in claim 5, wherein the push rod comprises a rod body with two ends penetrating through and an end cover covering one end of the rod body, the two abutting portions are arranged on the surface of the end cover departing from the rod body, and the driving assembly is arranged in the rod body.

7. The push rod assembly as claimed in claim 6, wherein the driving assembly includes a grooved wheel and two driving pins, the grooved wheel is disposed in the rod body and disposed opposite to the end cover, two second sliding grooves are formed on a surface of the grooved wheel facing the end cover, each of the second sliding grooves extends along a circumferential direction of the grooved wheel and radially outward of the grooved wheel, a yielding groove is formed in a bottom wall of the sliding way and extends through the end cover and along an extending direction of the sliding way, one end of each of the driving pins is inserted into one of the second sliding grooves, and the other end of each of the driving pins passes through the yielding groove and is fixedly connected to one of the clamping blocks;

8. The pushrod assembly of claim 7, wherein the drive assembly further comprises a drive shaft inserted into the body and coupled to a surface of the sheave facing away from the end cap, the drive shaft rotating relative to the body to drive the sheave to rotate.

9. The push rod assembly as claimed in claim 1, further comprising a dust cover, wherein the dust cover is disposed on the two abutting portions, the dust cover is provided with a position-giving opening, and the connecting portion passes through the position-giving opening and is fixed between the two abutting portions.

10. A high pressure syringe, characterized by comprising a syringe and the push rod assembly of any one of claims 1 to 9, wherein a rubber plug of the push rod assembly is arranged in the syringe, and the push rod is connected to the bottom of the rubber plug.