CN219071598U

CN219071598U - Push rod clamping jaw and high-pressure injector

Info

Publication number: CN219071598U
Application number: CN202223084608.6U
Authority: CN
Inventors: 宋彬; 胡波; 黄海
Original assignee: Suzhou Hengrui Hongyuan Medical Technology Co ltd
Current assignee: Suzhou Hengrui Hongyuan Medical Technology Co ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-05-26
Anticipated expiration: 2032-11-21

Abstract

The utility model relates to the technical field of medical equipment, and discloses a push rod clamping jaw and a high-pressure injector, wherein the push rod clamping jaw comprises a clamping head part and at least two clamping parts, the at least two clamping parts are arranged on the front surface of the clamping head part, the clamping head part moves along a first direction through a driving assembly, a clamping space is formed between the clamping parts, the clamping space can be used for inserting the end part of a piston rod along a second direction, and the second direction is different from the first direction; the push rod jaw further includes a bottom rail disposed at a bottom of the front surface of the grip portion, the bottom rail for selectively supporting an end of the piston rod. The push rod clamping jaw is additionally provided with the bottom retainer, so that the end part of the piston rod is supported by the bottom retainer when being positioned in the clamping space, the end part of the piston rod is prevented from being abutted against the inner wall of the clamping space, and the end part of the piston rod can be ensured to be taken out smoothly from the clamping space.

Description

Push rod clamping jaw and high-pressure injector

Technical Field

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

Background

The high-pressure injector has the main function of injecting contrast agent and physiological saline into the body of a patient, and can more clearly observe the focus position when the medical imaging diagnosis equipment is adopted. As shown in fig. 1, a cylinder body 1 'of a syringe or a prefilled syringe is loaded on a loading mechanism 2' of a high-pressure injector, and a piston rod end 3 'of the syringe or the prefilled syringe is simultaneously loaded on a push rod clamping jaw 4' of the high-pressure injector, and the push rod clamping jaw is driven by a driving component to move along the axial direction of the push rod clamping jaw so as to drive the piston rod end to synchronously move, thereby realizing operations such as medicine sucking, emptying, injection and the like of the high-pressure injector. Since the needle cylinder or the prefilled needle cylinder (hereinafter, for example, the needle cylinder) is used, the piston rod end 3 ' is inclined relative to the cylinder body 1 ', i.e. the axes of the piston rod end 3 ' and the prefilled needle cylinder are not on the same axis and have an inclined included angle θ (as shown in fig. 2), the piston rod end 3 ' and the inner wall of the push rod clamping jaw 4 ' are kept in a tight state (as shown in fig. 3), so that the needle cylinder cannot be removed smoothly.

Disclosure of Invention

The utility model aims to provide a push rod clamping jaw and a high-pressure injector, which solve the technical problem that an existing piston rod end part inclines relative to a cylinder body, and the piston rod end part and the inner wall of the push rod clamping jaw are kept in a tight abutting state, so that a needle cylinder cannot be taken down smoothly.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a push rod clamping jaw which is used for clamping the end part of a piston rod in a needle cylinder, and comprises a clamping head part and at least two clamping parts, wherein the at least two clamping parts are arranged on the front surface of the clamping head part, the clamping head part moves along a first direction through a driving assembly, a clamping space is formed between the clamping parts, the clamping space can be used for inserting the end part of the piston rod along a second direction, and the second direction is different from the first direction;

the piston rod further comprises a bottom rail which is arranged at the bottom of the front surface of the clamp head and is used for selectively supporting the end part of the piston rod.

As one preferable scheme of the push rod clamping jaw, two clamping parts are arranged, namely a first clamping part and a second clamping part, and the first clamping part and the second clamping part are symmetrically arranged on the left side and the right side of the front surface of the clamping head part along the horizontal direction.

As a preferable scheme of the push rod clamping jaw, the first clamping portion or the second clamping portion comprises a first section and a second section which are vertically arranged, one end, away from the second section, of the first section is fixed with the front surface of the clamping head portion, and the two second sections of the first clamping portion and the second clamping portion are oppositely arranged.

As a preferred embodiment of the push rod clamping jaw, a distance between a face of the second section facing the end of the piston rod and the front surface of the chuck part is larger than a thickness of the end of the piston rod.

As a preferred solution of the push rod clamping jaw described above, the gap between the two opposite facing surfaces of the first section of the first clamping portion and the second clamping portion is larger than the diameter of the end portion of the piston rod.

As a preferable mode of the push rod clamping jaw, a gap exists between the circumference side of the end part of the piston rod and the bottom rail or is in close contact with the bottom rail.

As a preferred embodiment of the pusher jaw, the two end faces of the end of the piston rod are selectively abutted against the front surface of the second segment or the chuck part.

The utility model also provides a high-pressure injector, which comprises the push rod clamping jaw.

The utility model has the beneficial effects that:

according to the push rod clamping jaw, the bottom retainer is additionally arranged on the front surface of the clamping head, when the piston rod of the needle cylinder has an inclined included angle relative to the cylinder body of the needle cylinder, the end part of the piston rod can be placed on the bottom retainer to prevent the inclined included angle of the end part of the piston rod from being continuously enlarged, so that the end part of the piston rod is prevented from being abutted against the inner wall of the clamping space, and the end part of the piston rod is ensured to be taken out of the clamping space smoothly.

According to the high-pressure injector provided by the utility model, the end part of the piston rod of the needle cylinder can be smoothly taken down from the loading mechanism together when the cylinder body of the needle cylinder is taken down through the push rod clamping jaw.

Drawings

FIG. 1 is a schematic view of a high pressure syringe provided in the prior art;

fig. 2 is a schematic view of the structure of a syringe provided in the prior art when the syringe has an inclination angle θ;

FIG. 3 is a schematic view of the assembled structure of the needle cylinder and the pusher jaw when the needle cylinder provided in the prior art has an inclined angle θ;

FIG. 4 is a schematic diagram of a pusher jaw according to the present utility model;

fig. 5 is a schematic structural diagram of a push rod clamping jaw according to the second embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional view of a pusher jaw provided by the present utility model;

FIG. 7 is an enlarged view of a portion of the pusher jaw provided by the present utility model;

fig. 8 is a schematic diagram of the assembly structure of the needle cylinder and the pusher jaw when the needle cylinder provided by the utility model has an inclined angle θ.

In fig. 1 to 3:

1', a cylinder body; 2', a loading mechanism; 3', end of piston rod; 4', push rod clamping jaw.

Fig. 4 to 8:

1. an end of the piston rod; 11. pulling the side face; 12. pushing the side surface; 13. a column end face;

2. a push rod clamping jaw; 21. pulling and pressing the surface; 211. a border; 22. a pressing surface; 23. a side guide surface; 24. and (5) bottom baffle.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1, the present embodiment provides a high pressure syringe that includes a push rod jaw. In the related art, as shown in fig. 2 to 3, when the rod end 3 ' is inclined with respect to the cylinder body 1 ', the rod end 3 ' is pressed against the inner wall of the rod jaw 4 ', which results in that the cylinder installed in the loading mechanism 2 ' cannot be smoothly removed.

To solve the above problems. As shown in fig. 4 to 5, the present embodiment provides a push rod clamping jaw for clamping an end portion 1 of a piston rod in a syringe, which includes a clamping head 2, at least two clamping portions, and a bottom rail 24, wherein the clamping portions and the bottom rail 24 are disposed on a front surface of the clamping head 2, the clamping head 2 moves in a first direction through a driving assembly, a clamping space is formed between the clamping portions, the clamping space is used for inserting the end portion 1 of the piston rod in a second direction, the second direction is different from the first direction, the bottom rail 24 is disposed at a bottom portion of a front surface of the push rod clamping jaw 2, and the bottom rail 24 is used for selectively supporting the end portion 1 of the piston rod.

Wherein the first direction is the axial direction of the needle cylinder along the extending direction when the needle cylinder is mounted in the loading mechanism 2'. The second direction is preferably perpendicular to the first direction.

It can be understood that, by adding the bottom rail 24 at the bottom of the front surface of the chuck part 2, when the piston rod of the syringe has an inclined angle θ with respect to the syringe body of the syringe, the end 1 of the piston rod can rest on the bottom rail 24 to prevent the inclined angle of the end 1 of the piston rod from expanding continuously, so as to avoid the end 1 of the piston rod from abutting against the inner wall of the clamping space, and ensure that the end 1 of the piston rod can be taken out smoothly from the clamping space.

Further, two clamping portions, namely a first clamping portion and a second clamping portion, are provided in the clamping portion of the embodiment, and the first clamping portion and the second clamping portion are symmetrically arranged on the left side and the right side of the front surface of the clamping portion 2 along the horizontal direction. In this way, the first clamping part, the second clamping part and the bottom rail 24 enclose a clamping space with an open upper end, through which the end 1 of the piston rod enters.

Preferably, the first clamping part and the second clamping part each comprise a first section and a second section, the first section and the second section are mutually perpendicular, that is, the first clamping part and the second clamping part are all in an L-shaped arrangement, one end of the first section, which is far away from the second section, is fixed with the front surface of the chuck part 2, the second section of the first clamping part and the second clamping part are oppositely arranged and are parallel to the front surface of the chuck part 2, and the end part 1 of the piston rod is limited in the clamping space by arranging the first section and the second section. When the end 1 of the piston rod is located in the clamping space, the rod part of the piston rod is located between the two second segments.

Specifically, the surface of the second section facing the end 1 of the piston rod is a pulling and pressing surface 21, the front surface of the clamp head 2 is a pushing surface 22, the distance between the pulling and pressing surface 21 and the pushing surface 22 is larger than the thickness of the end 1 of the piston rod, two corresponding surfaces of the first section of the first clamping part and the second clamping part are side guiding surfaces 23, the gap between the two side guiding surfaces 23 is larger than the diameter of the end 1 of the piston rod, and the circumference side of the end 1 of the piston rod is a column end surface 13. The side of the end portion 1 of the piston rod having the piston rod portion is a pull side surface 11, and the side of the end portion 1 of the piston rod opposite to the pull side surface 11 is a push side surface 12.

Case 1: when the piston rod in the needle cylinder does not have the inclined included angle theta. As shown in fig. 6-7, the end 1 of the piston rod is located in the clamping space with a distance T1 between the pulling flank 11 and the pulling-pressing flank 21 and a distance T2 between the pushing flank 12 and the pushing flank 22. The distances of T1 and T2 may be equal or unequal, which is not particularly limited in this embodiment.

The first clamping part has a distance T4 between the side guide surface 23 and the column end surface 13, and the second clamping part has a distance T5 between the side guide surface 23 and the column end surface 13. The distances of T4 and T5 may be equal or unequal, which is not particularly limited in this embodiment. The end face 13 of the end 1 of the piston rod has a distance from the bottom rail 24, and the distance is T3.

To sum up, the loading mechanism of the high pressure injector is placed in the syringe body, the end 1 of the piston rod is located in the clamping space of the clamping head 2, and the above-mentioned T1, T2, T3, T4 and T5 exist.

Case 2: when the piston rod in the needle cylinder has an inclined included angle theta. As shown in fig. 8, the end 1 of the piston rod is located in the holding space, the column end face 13 of the end 1 of the piston rod is in close contact with the bottom rail 24, and the above-mentioned space T3 does not exist. T1 and/or T2, and T4 and/or T5 are optionally present during movement of the collet section 2.

Specifically, the pull side surface 11 and the push side surface 12 of the end portion 1 of the piston rod selectively abut against the pull pressing surface 21 of the second stage or the front surface of the collet section 2, i.e., the pressing surface 22. It can be understood that when the high-pressure injector performs the drug sucking operation, the driving component drives the end part 1 of the piston rod to be far away from the barrel body of the needle cylinder, and the pulling and pressing surface 21 and the pulling and pressing side surface 11 are pressed together at the moment; when the high-pressure injector performs injection operation, the driving assembly drives the end part 1 of the piston rod to approach the barrel body of the needle cylinder, and the pushing surface 22 is pressed with the pushing side surface 12.

In the above case 2, in this embodiment, by adding the bottom rail 24, when the piston rod of the syringe has an inclination angle θ with respect to the syringe, that is, the end 1 of the piston rod has an inclination with respect to the syringe body, the bottom rail 24 can support the rising post end face 13, so as to limit the inclination angle θ of the piston rod to further expand, and avoid the side line 211 of the pulling side face 11 and the pulling and pressing face 21, which is close to the bottom rail 24, from being extruded, so that the utility model ensures that the end 1 of the piston rod can be smoothly removed by adding the bottom rail 24.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The push rod clamping jaw is used for clamping the end part (1) of the piston rod in the needle cylinder and comprises a clamping head part (2) and at least two clamping parts, wherein the at least two clamping parts are arranged on the front surface of the clamping head part (2), the clamping head part (2) moves along a first direction through a driving assembly, a clamping space is formed between the clamping parts, the clamping space can be used for inserting the end part (1) of the piston rod along a second direction, and the second direction is different from the first direction; it is characterized in that the method comprises the steps of,

and a bottom rail (24), the bottom rail (24) being provided at the bottom of the front surface of the collet section (2), the bottom rail (24) being for selectively supporting the end (1) of the piston rod.

2. Push rod clamping jaw according to claim 1, characterized in that the clamping parts are provided with two clamping parts, namely a first clamping part and a second clamping part, which are symmetrically arranged on the left and right sides of the front surface of the chuck part (2) along the horizontal direction.

3. Push rod clamping jaw according to claim 2, characterized in that the first clamping part or the second clamping part comprises a first section and a second section which are vertically arranged, wherein one end of the first section away from the second section is fixed with the front surface of the chuck part (2), and the two second sections of the first clamping part and the second clamping part are arranged opposite to each other.

4. A pusher jaw as claimed in claim 3, characterized in that the distance between the face of the second section facing the end (1) of the piston rod and the front surface of the collet section (2) is greater than the thickness of the end (1) of the piston rod.

5. A pusher jaw as claimed in claim 3, characterized in that the gap between the two opposite facing surfaces of the first section of the first and second clamping portions is larger than the diameter of the end (1) of the piston rod.

6. A pusher jaw as claimed in claim 3, characterized in that a gap is present between the circumferential side of the end (1) of the piston rod and the bottom rail (24) or in close contact with the bottom rail (24).

7. A push rod jaw as claimed in claim 3, characterized in that the two end faces of the end (1) of the piston rod are selectively in abutment or not in abutment with the front surface of the second segment or the collet section (2).

8. High pressure injector, characterized by comprising a pusher jaw according to any of claims 1 to 7.