CN114225148B

CN114225148B - Height adjusting device and high-pressure injector

Info

Publication number: CN114225148B
Application number: CN202111542887.3A
Authority: CN
Inventors: 宋彬; 王军; 代习伟
Original assignee: Suzhou Hengruidisheng Medical Technology Co ltd
Current assignee: Suzhou Hengruidisheng Medical Technology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2023-11-21
Anticipated expiration: 2041-12-16
Also published as: CN114225148A

Abstract

The invention belongs to the technical field of medical appliances, and discloses a height adjusting device and a high-pressure injector. The height adjusting device comprises a fixed seat, an adjusting sleeve and a mounting column. The adjusting sleeve is arranged on the fixing seat and can rotate around the axis of the adjusting sleeve; the mounting column penetrates through the adjusting sleeve and is matched with the adjusting sleeve, and the mounting column can move along the axial direction of the mounting column when the adjusting sleeve rotates relative to the fixing seat. This height adjusting device compact structure only needs to rotate the adjusting collar and can drive the erection column and follow its self axial displacement, convenient operation, and does not need extra activity space when adjusting collar rotates, is favorable to reducing height adjusting device's size, and convenient to carry is favorable to reduce cost.

Description

Height adjusting device and high-pressure injector

Technical Field

The invention relates to the technical field of medical equipment, in particular to a height adjusting device and a high-pressure injector.

Background

The existing medical devices require height adjustment devices to adjust the position of the module to meet operational requirements, such as an injector head in a high pressure injector. High pressure injectors are used to inject contrast media and saline into a patient's body to more clearly view lesion locations when performing medical imaging diagnostics.

The high pressure injector generally includes a housing and an injector head. When using a high pressure injector, medical personnel are required to first rotate the injector head about a horizontal axis to a vertically uppermost position to load an empty syringe for containing contrast media and saline and to connect the empty syringe to a J-tube or penetrator. Then, one hand grabs bottled normal saline and contrast agent, and the other hand presses a functional key on the injector head to perform drug sucking operation. After the medicine suction is finished, the medicine bottle, the puncture outfit or the J-shaped tube is taken down, the long spiral tube is connected to the syringe containing contrast agent and normal saline, and the emptying operation is carried out by pressing a function key on the injection head. After the emptying is finished, the injection machine head is rotated to the position below the horizontal line of the rotating shaft, and then the injection operation can be performed.

In the process of sucking and exhausting medicine with the high pressure syringe, the loading part and the key part of the high pressure syringe are in high position. The high-pressure injectors on the market at present are basically fixed in height for the mounting rack of the injection head, i.e. the height of the injection head part is not adjustable. The medical staff has larger height difference, so that the medical staff is convenient to use, and especially the medical staff with lower height need to stand on the tiptoe to operate.

Part of the high-pressure injector adjusts the height of the injector head by several structures:

1. install injection aircraft nose on rotatory gallows, adjust injection aircraft nose height through the balance arm of rotation gallows, this kind of scheme needs to occupy great operating space, and has increased the cable and has arranged the degree of difficulty.

2. The linear motion module such as a linear motion cylinder or a screw nut is used as a power source to drive the injection head to lift, and the injection head can be automatically adjusted without manual adjustment. In such a structure, the size of the linear electric cylinder or the linear movement module satisfying the required thrust is generally large, and the cost is high. If the waterproof sealing effect and the internal wiring are to be improved, the overall size is further increased.

3. The balancing weight, the pulley block and the steel wire rope are arranged, the injection machine head is driven to lift by manually pulling the steel wire rope, and a mechanical structure needs to be added to lock the steel wire rope so that the injection machine head stays at a specified position. The weight of the whole machine can be increased, equipment carrying is inconvenient, the balancing weight can only be arranged in the power supply box, and the size of the power supply box can be increased.

Disclosure of Invention

The invention aims to provide a height adjusting device and a high-pressure injector, which can solve the problems of large size, high cost and inconvenient transportation of a height adjusting structure of an injection machine head in the prior art.

To achieve the purpose, the invention adopts the following technical scheme:

a height adjustment device, comprising:

a fixing seat;

the adjusting sleeve is arranged on the fixing seat and can rotate around the axis of the adjusting sleeve;

the mounting column penetrates through the adjusting sleeve and is matched with the adjusting sleeve, and the mounting column is configured to move axially along the mounting column when the adjusting sleeve rotates relative to the fixing seat.

The fixing seat comprises a supporting tube portion, the adjusting sleeve is rotatably sleeved outside the supporting tube portion and is axially fixed with the supporting tube portion, and at least part of the mounting column can extend into the supporting tube portion.

The top end face of the supporting tube portion is a first rotary abutting face, a second rotary abutting face parallel to the first rotary abutting face is formed on the inner wall of the adjusting sleeve, and the second rotary abutting face abuts against the first rotary abutting face and can rotate relative to the first rotary abutting face.

Wherein at least a portion of the support tube portion constructing the first rotary abutment face is made of a self-lubricating material;

and/or at least the portion of the adjustment sleeve that configures the second rotary abutment face is made of a self-lubricating material.

The installation column comprises a sliding guide section and a spiral matching section which are sequentially connected from bottom to top, the spiral matching section is in spiral matching with the adjusting sleeve, and the inner side wall of the supporting tube portion is in sliding contact with the sliding guide section.

Wherein, stay tube portion includes stay tube and first uide bushing, first uide bushing fixed set up in the stay tube, first uide bushing includes:

the first sleeve body is sleeved outside the sliding guide section and is in sliding contact with the mounting column;

a first rotary support flange extending radially outwardly from a top edge of the first sleeve, a top end face of the first rotary support flange configured as a first rotary abutment face;

the first guide sleeve is made of self-lubricating material.

The outer diameter of the spiral matching section is larger than that of the sliding guide section, a protection flange is convexly arranged on the inner side wall of the adjusting sleeve, the protection flange is sleeved outside the sliding guide section, and the inner diameter of the protection flange is smaller than that of the spiral matching section.

The outer wall of the supporting tube portion is provided with a first limiting surface, the first limiting surface and the axis of the supporting tube portion are arranged in an included angle mode, the inner wall of the adjusting sleeve is provided with a second limiting surface parallel to the first limiting surface, and the second limiting surface is located below the first limiting surface.

The outer wall of the supporting tube part is provided with a first limit groove, and the top side wall of the first limit groove is configured as the first limit surface;

the inner wall of the adjusting sleeve is convexly provided with a first limiting protruding portion, the first limiting protruding portion is located in the first limiting groove, and the top side wall of the first limiting protruding portion is structured to be the second limiting surface.

Wherein, the adjusting sleeve includes:

the rotating sleeve is sleeved outside the mounting column and is in spiral fit with the mounting column, and the bottom end surface of the rotating sleeve is configured to be the second rotating abutting surface;

the first adapter anchor ear is hooped outside the rotary sleeve and sleeved outside the supporting tube part, and the inner side wall of the first adapter anchor ear is arranged with the outer side wall of the supporting tube part at intervals.

The rotary sleeve is characterized in that a second limiting protrusion is arranged on one of the outer wall of the rotary sleeve and the inner wall of the first switching hoop, a second limiting groove is formed in the other one of the outer wall of the rotary sleeve and the inner wall of the first switching hoop, and the second limiting protrusion stretches into the second limiting groove.

The height adjusting device further comprises a shell component, wherein the shell component is sleeved outside the adjusting sleeve and is fixed with the adjusting sleeve, and the shell component can drive the adjusting sleeve to rotate.

The adjusting sleeve comprises a shell component, wherein a first step surface is formed in the concave shape of the circumferential side wall of the adjusting sleeve, a second step surface is arranged on the inner wall of the shell component in an inward convex mode, and the second step surface can be abutted to the first step surface along the circumferential direction of the adjusting sleeve so as to transmit torque.

The shell assembly comprises a rotary shell, the rotary shell comprises a first half shell, a second half shell and a first fastening piece, the first half shell and the second half shell are connected in a detachable mode along the circumferential direction, the first half shell and the second half shell are connected with the first fastening piece, and the first fastening piece is used for being connected with the adjusting sleeve in a detachable mode.

The first half shell is provided with a first butt joint surface, the second half shell is provided with a second butt joint surface which is in butt joint with the first butt joint surface, and a sealing piece is arranged between the first butt joint surface and the second butt joint surface.

One of the first butt joint surface and the second butt joint surface is provided with a butt joint protruding portion, the other one of the first butt joint surface and the second butt joint surface is provided with a butt joint groove, a protruding butt joint surface is constructed on the butt joint protruding portion, a groove butt joint surface is constructed on the inner wall of the butt joint groove, and the protruding butt joint surface can slide along the groove butt joint surface so that the butt joint protruding portion stretches into the butt joint groove.

The shell assembly further comprises a shielding sleeve, and the shielding sleeve is sleeved outside the rotary shell so as to shield the first fastening piece.

The height adjusting device is of a hollow structure to form a wiring cavity, and the wiring cavity is used for installing a cable.

The outer wall of the fixing seat is provided with a wire fixing seat, and the wire fixing seat is configured to fix a cable which stretches out of the wire cavity after being bent from the bottom of the wire cavity.

The mounting column is provided with a first sliding part, the fixing seat is provided with a second sliding part, and the first sliding part is in sliding fit with the second sliding part along the vertical direction.

The second sliding part is a guide hole extending vertically, the first sliding part is arranged in the guide hole in a sliding mode, and the first sliding part is in contact with side walls on two sides of the guide hole.

The mounting column is hollow, an assembly hole is formed in the outer side wall of the mounting column, the assembly hole comprises a positioning hole section and a sliding hole section, the sliding hole Duan Guanchuan is formed in the bottom end face of the mounting column, and the width of the positioning hole section is larger than that of the sliding hole section;

the first sliding part is provided with two first adapting surfaces which are arranged oppositely and two second adapting surfaces which are arranged oppositely;

The first adapting surfaces are adapted to the inner wall of the sliding-in hole section, and the distance between the two first adapting surfaces is adapted to the width of the sliding-in hole section;

the second adapting surfaces are adapted to the inner wall of the positioning hole section, and the distance between the two second adapting surfaces is adapted to the width of the positioning hole section.

Wherein the first sliding portion includes:

the inner shaft is provided with a limiting shaft shoulder at one end, the first adapting surface and the second adapting surface are arranged on the inner shaft, and the limiting shaft shoulder is abutted with the inner wall of the mounting column;

the shaft sleeve is sleeved at one end of the inner shaft extending out of the mounting column and is abutted against the outer wall of the mounting column;

and the locking piece is detachably connected with the shaft sleeve and the inner shaft.

The first sliding part further comprises a rotating part, the rotating part is sleeved outside the shaft sleeve in a rotating mode, and the rotating part is in rolling contact with the inner wall of the guide hole.

Wherein the rotating member is made of a self-lubricating material.

The high-pressure injector comprises an injection head and the height adjusting device, wherein the mounting column is used for driving the injection head to lift.

The invention has the beneficial effects that:

In the height adjusting device provided by the invention, the mounting column and the adjusting sleeve are sleeved, the structure is compact, the mounting column can be driven to move along the axial direction of the mounting column only by rotating the adjusting sleeve, the operation is convenient, no additional movable space is needed when the adjusting sleeve rotates, the size of the height adjusting device is reduced, the carrying is convenient, and the cost is reduced.

The installing column is located the adjusting sleeve, and hollow structure can be made to the installing column in order to arrange the cable, and the cable is arranged to the cable of being convenient for, and the cooperation structure between adjusting sleeve and the installing column can not be interfered with to the cable, can avoid damaging the cable.

According to the invention, the adjusting sleeve is matched with the mounting column through the screw pair, so that the rotation of the adjusting sleeve can be converted into the linear motion of the mounting column, the screw pair can rotate for any angle and then stop, and the linear motion of the mounting column is also stopped along with the screw pair, so that stepless adjustment can be realized; the adjusting sleeve can rotate in the forward direction and the reverse direction to drive the mounting column to lift, and therefore the height can be adjusted in two directions.

Drawings

FIG. 1 is a schematic view of the structure of an injection head in a state of a high-pressure injector according to the present invention;

FIG. 2 is a schematic view of a height adjustment device according to the present invention;

FIG. 3 is a cross-sectional view of a height adjustment device provided by the present invention;

FIG. 4 is a cross-sectional view of a portion of the structure of the present invention when the adjustment sleeve, mounting post and support tube portion are assembled;

FIG. 5 is a second cross-sectional view of a portion of the structure provided by the present invention when the adjustment sleeve, mounting post and support tube portion are assembled;

fig. 6 is a schematic structural view of the rotary sleeve and the first adapter hoop provided by the invention after assembly;

fig. 7 is a schematic structural view of the swivel sleeve and the first adapter hoop provided by the invention prior to assembly;

fig. 8 is a cross-sectional view of the swivel sleeve and first adapter anchor ear provided by the present invention after assembly;

FIG. 9 is a cross-sectional view of a holder provided by the present invention;

FIG. 10 is a cross-sectional view I of the mounting post of the present invention assembled with a first slide;

FIG. 11 is a schematic view of the structure of the inner shaft of the present invention as assembled with the mounting post;

FIG. 12 is a schematic view of the structure of the inner shaft according to the present invention as it slides into the pilot hole section;

FIG. 13 is a cross-sectional view of the inner shaft provided by the present invention slid into the pilot hole section;

FIG. 14 is a schematic view of the assembled inner shaft and mounting post provided by the present invention;

FIG. 15 is a second cross-sectional view of the mounting post of the present invention assembled with a first slide;

FIG. 16 is a cross-sectional view of the adjustment sleeve provided by the present invention after assembly with a mounting post;

FIG. 17 is an exploded view of the height adjustment device provided by the present invention;

FIG. 18 is a cross-sectional view of the adjustment sleeve provided by the present invention after assembly with a mounting post;

FIG. 19 is an exploded view of the housing assembly provided by the present invention;

FIG. 20 is a cross-sectional view of the first and second half-shells provided by the present invention when not assembled;

FIG. 21 is a cross-sectional view of the first and second half-shells provided by the present invention when assembled;

fig. 22 is a cross-sectional view of a housing assembly provided by the present invention.

In the figure:

100. a base; 200. a power supply box; 300. a height adjusting device; 400. a handpiece support; 401. a handle; 500. an injection head; 510. a function key; 520. a needle cylinder; 530. a medicine bottle; 540. a cable;

1. a fixing seat; 11. a support tube section; 110. a first rotary abutment surface; 111. a support tube; 1111. a first limit groove; 1112. a guide hole; 11121. a top limit surface; 11122. a bottom limit surface; 112. a first guide sleeve; 12. a support frame; 13. a wire fixing seat;

2. an adjusting sleeve; 21. a rotating sleeve; 210. a second rotary abutment surface; 211. the second limit groove; 212. a protective flange; 22. the first switching anchor ear; 220. the second limiting surface; 221. a first limit projection; 222. a second limit projection; 223. a first step surface; 224. a second fastener;

3. A mounting column; 31. a sliding guide section; 311. positioning the hole section; 312. a slide-in hole section; 313. a mounting plane; 32. a spiral mating section; 33. a rotary guide section; 34. a first sliding portion; 341. an inner shaft; 3411. a first mating surface; 3412. a second mating surface; 3413. limiting shaft shoulders; 342. a locking member; 343. a shaft sleeve; 344. a rotating member;

4. a housing assembly; 41. rotating the housing; 411. abutting the rib; 412. a first half shell; 4121. a butt joint protruding part; 4122. a first radially extending surface; 4123. a first axially extending face; 4124. a second radially extending surface; 4125. sealing the groove; 413. a second half shell; 4131. a butt joint groove; 4132. a third radially extending surface; 4133. a second axially extending surface; 4134. a fourth radially extending surface; 415. a first fastener; 416. a second step surface; 42. a shielding sleeve; 44. and a seal.

Detailed Description

The invention 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 invention 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 invention are shown in the drawings.

In the description of the present invention, 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 invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, 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 invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The present embodiment provides a high pressure syringe for injecting contrast medium or physiological saline. As shown in fig. 1, the high pressure syringe includes a base 100, a power box 200, a height adjusting device 300, a head holder 400, and an injection head 500. The power box 200 and the height adjusting device 300 are both arranged on the base 100, the bottom end of the handpiece support 400 is connected with the height adjusting device 300, and the top end is used for installing the injection handpiece 500. The base 100 is used as a bearing substrate of the high-pressure injector and is used for installing other structures of the high-pressure injector, and travelling wheels are rotatably arranged on the base 100 so as to adjust the position of the high-pressure injector and facilitate operation.

Further, the handpiece support 400 includes a handle 401, and the base 400 can be moved by pushing and pulling the handle 401 to adjust the position of the high pressure syringe.

In this embodiment, the injection head 500 is provided with a mounting portion for mounting the syringe 520, which is capable of fixing the syringe 520 and pushing and pulling a piston rod of the syringe 520 so as to suck the medicine liquid into the syringe 520 from the medicine bottle 530 or discharge the air in the syringe 520. The injection head 500 is further provided with a function key 510, and a medical staff controls the mounting part to push and pull the piston rod by pressing the function key 510 so as to perform operations of sucking medicine liquid, evacuating and injecting.

The height adjusting device 300 in this embodiment is described below, so that the height of the injection head can be adjusted according to the height of the medical staff, and the operation of the medical staff is facilitated.

Specifically, as shown in fig. 2, the height adjusting device 300 includes a fixing base 1, an adjusting bush 2, and a mounting post 3. The adjusting sleeve 2 is vertically arranged and is movably connected with the fixing seat 1, so that the adjusting sleeve 2 can rotate around the axis of the adjusting sleeve 2 relative to the fixing seat 1. The top of the mounting column 3 is connected with the machine head bracket. The mounting column 3 is arranged in the adjusting sleeve 2 in a penetrating way and is matched with the adjusting sleeve 2. When the adjusting sleeve 2 is rotated, the mounting column 3 can be lifted and lowered under the driving of the adjusting sleeve 2 so as to adjust the height of the injection head. In the embodiment, the height of the injection machine head is adjusted through the mounting column 3 and the adjusting sleeve 2 which are in spiral fit, and the spiral fit has a self-locking function, so that the structure is simplified; the mounting column 3 and the adjusting sleeve 2 are sleeved, the structure is compact, and the movable space required for adjusting the height of the injection machine head is small; and the medical staff only needs to rotate the adjusting sleeve 2 to realize the height adjustment of the injection head, and the operation is convenient.

In this embodiment, the adjustment sleeve 2 and the mounting post 3 are screw-fitted by a screw pair to convert the rotational movement of the adjustment sleeve 2 into a linear movement of the mounting post 3. The adjusting sleeve 2 can rotate in the forward direction and the reverse direction relative to the mounting column 3 so as to realize the ascending and the descending of the mounting column 3, and the bidirectional adjustment of the height of the mounting column 3 can be realized. The adjusting sleeve 2 can be rotated for any angle and then stopped, and accordingly the linear motion of the mounting column 3 is stopped, so that the stepless adjustment of the height of the mounting column 3 can be realized. The height adjusting device 300 in this embodiment can realize bidirectional stepless adjustment of the height of the injection head 500.

Further, as shown in fig. 3 and 4, the fixing base 1 includes a support tube portion 11, the adjusting sleeve 2 is rotatably sleeved outside the support tube portion 11 and is fixed with the support tube portion 11 along an axial direction, and the mounting post 3 is inserted into the support tube portion 11. Through setting up stay tube portion 11, can make the nested setting of erection column 3, stay tube portion 11 and adjustment sleeve 2, be favorable to compact structure, and be favorable to guaranteeing that the focus of erection column 3, stay tube portion 11 and adjustment sleeve 2 coincides along vertical direction, be favorable to improving the stability of high adjusting device 300.

In the high pressure syringe, the injector head 500 needs to be driven by electric power, and the injector head 500 needs to be connected to the power box 200 on the base 100 through the cable 540. To facilitate the cable arranging process 540, the height adjusting device 300 of the present embodiment has a hollow structure to form a routing cavity. Specifically, the mounting post 3 is of a hollow structure, and the inner cavity of the mounting post 3 and the inner cavity of the supporting tube 11 are both part of a wiring cavity, and the cable 540 connected to the injection head 500 extends to the base 100 through the wiring cavity so as to be connected with the power box 200. In this embodiment, the cable 540 is prevented from being exposed by the internal wiring of the height adjusting device 300, so that the cable 540 can be started to be protected, the cable 540 is prevented from being worn or wound on the structure of the high-pressure injector, the normal use of the high-pressure injector is ensured, and the use safety is ensured; on the other hand, the appearance of the high-pressure injector can be tidier.

Compared with the scheme that the injection machine head is installed through the rocker arm in the prior art, the injection machine head is driven to lift through the rotation of the rocker arm, the injection machine head 500 is driven to lift through the installation column 3, so that the cable 540 can be routed through the installation column 3, and interference between the cable 540 and an external structure is avoided; compared with the linear electric cylinder, the screw nut transmission assembly or the gear rack transmission assembly which is adopted to drive the injection machine head 500 to lift, the linear electric cylinder or the linear motion module which meets the required thrust is large in size and high in cost, the height of the injection machine head 500 does not need to be adjusted by providing extra electric energy in the embodiment, the structure is compact, the size is small, and the cable 540 is separated from the transmission part, namely the cable 540 in the embodiment cannot directly contact with the screw transmission pair, interference between the cable 540 and the transmission structure can be avoided, and the structural stability and the electricity use safety are improved.

Further, since the height adjusting device 300 has a larger dimension in the vertical direction, in order to improve the stability of the height adjusting device 300, the fixing base 1 further includes a supporting frame 12, the supporting tube portion 11 is disposed on the supporting frame 12, the bottom surface of the supporting frame 12 contacts with the base 100 and is a plane, and the bottom surface area of the supporting frame 12 can be larger than the cross-sectional area of the supporting tube portion 11, which is beneficial to increasing the contact area between the fixing base 1 and the base, thereby improving the stability of the height adjusting device 300. In this embodiment, the support frame 12 may have a rectangular parallelepiped structure. In other embodiments, the support frame 12 may have other shapes, such as a frustum shape.

Because the height of the injector head 500 is adjustable, the vertical distance between the injector head 500 and the power box 200 is changed, and in order to cause the cable 540 to be pulled or even broken when the height of the injector head 500 is changed, the length of the cable 540 in the routing cavity is left to be abundant, i.e. the length of the cable 540 in the routing cavity is not less than the top height of the height adjusting device 300 when the injector head 500 is lifted to the highest height, so as to avoid the cable 540 from being pulled.

Further, the outer wall of the supporting frame 12 is further provided with a wire fixing seat 13, and after the top end of the cable 540 is connected with the injection machine head 500, the bottom end of the cable 540 stretches out of the supporting frame 12 after being bent in the supporting frame 12 and is fixed by the wire fixing seat 13. Through setting up the solidus seat 13, can play certain restraint effect to cable 540, can avoid cable 540 to wind into the knot after freely crooked completely, can also avoid cable 540 to receive the pulling force with the one end that power supply box 200 is connected, be favorable to guaranteeing that cable 540 is in connected state all the time with the power supply box.

Because fixing base 1 and adjusting sleeve 2 are normal running fit, and fixing base 1 needs to support adjusting sleeve 2 to restrict adjusting sleeve 2 to move along vertical direction. In order to simplify the matching structure between the fixing base 1 and the adjusting sleeve 2, as shown in fig. 4, the top end surface of the supporting tube 11 is a first rotating abutment surface 110, and a second rotating abutment surface 210 parallel to the first rotating abutment surface 110 is configured on the inner wall of the adjusting sleeve 2, where the second rotating abutment surface 210 abuts against the first rotating abutment surface 110 and can rotate relative to the first rotating abutment surface 110. Since the adjusting sleeve 2 is disposed above the supporting tube portion 11, the adjusting sleeve 2 will fall under the effect of the gravity of the adjusting sleeve 2, so that the first rotary abutment surface 110 is always in abutment with the second rotary abutment surface 210. Compared with the adoption of a bearing as a rotary support to realize rotary connection, the rotary fit of the adjusting sleeve 2 and the supporting tube part 11 is realized through the fit of the first rotary abutting surface 110 and the second rotary abutting surface 210, the structure is simple, the manufacturing cost is reduced, and the adjusting sleeve 2 and the supporting tube part 11 are convenient to assemble and disassemble and convenient to maintain.

Further, the outer side wall of the supporting component is arranged at intervals with the inner side wall of the adjusting sleeve 2, so that contact friction can be reduced, medical staff can save more effort when rotating the adjusting sleeve 2, and the operation difficulty of adjusting the height of the injection head 500 is further reduced.

To facilitate the machining and assembly of the adjustment sleeve 2, the adjustment sleeve 2 comprises a rotating sleeve 21 and a first adapter collar 22, as shown in fig. 4 and 5. The rotary sleeve 21 is sleeved outside the mounting column 3 and is in spiral fit with the mounting column 3, and the bottom end surface of the rotary sleeve 21 is configured as a second rotary abutting surface 210. The first adapter anchor ear 22 is sleeved outside the rotary sleeve 21 and the supporting tube portion 11, the first adapter anchor ear 22 is fastened with the rotary sleeve 21 to be fixed, the inner side wall of the first adapter anchor ear 22 is arranged at intervals with the outer wall of the supporting tube portion 11, and the inner wall of the first adapter anchor ear 22 is provided with a first limiting protruding portion 221 and a second limiting surface 220. Through designing adjusting collar 2 into split type structure, the rotatory butt face 210 of convenient processing second and the spacing face 220 of second, and can adjust the machining precision of rotatory cover 21 and first joint staple bolt 22 respectively according to specific cooperation requirement to the reduction processing degree of difficulty. In addition, the detachable characteristic of the first adapter anchor ear 22 is utilized, so that the adjusting sleeve 2 and the supporting tube part 11 are convenient to detach and maintain.

To further enhance the fixing effect of the first adapter hoop 22 to the rotating sleeve 21, as shown in fig. 6, the first adapter hoop 22 may also be fixed to the rotating sleeve 21 by a second fastener 224. Wherein the second fastener 224 may be a screw or pin.

In order to improve the positioning accuracy of the first rotating hoop 22 and the rotating sleeve 21, a second limiting groove 211 is formed in the outer wall of the rotating sleeve 21, a second limiting protruding portion 222 is formed in the inner wall of the first rotating hoop 22, and the second limiting protruding portion 222 extends into the second limiting groove 211 so as to achieve axial positioning of the first rotating hoop 22 and the rotating sleeve 21. The second fastening piece 224 passes through the second limiting protruding portion 222 and is fixedly connected with the bottom surface of the second limiting groove 211, so that a unique determined position of the first adapter hoop 22 and the rotating sleeve 21 can be realized.

Further, the first adapter hoop 22 includes a first half and a second half that are detachably connected, and the first half and the second half are fixed and then the rotating sleeve 21 is tightened. By adopting the first half sleeve and the second half sleeve to be matched, the first transfer anchor ear 22 is more convenient to assemble and disassemble, and the rotary sleeve 21 is also convenient to assemble and disassemble. The first half and the second half are secured to the rotating sleeve 21 by a second fastener 224, respectively. It will be appreciated that when the first half and the second half are assembled, there is a gap between them, and by tightening the second fastener 224, the gap can be eliminated, so that the first half and the second half are attached to ensure that the first adapter hoop 22 is firmly connected to the rotating sleeve 21.

Due to machining and assembly errors, the first adapter anchor 22 cannot be detached after the second limiting protrusion 222 is tightly attached to the second limiting groove 211. To solve the above problem, as shown in fig. 7, the second fastening member 224 is removed and replaced with a long screw, and the first half or the second half caught in the second limiting groove 211 can be quickly and conveniently pulled out by applying a pulling force to the long screw.

In order to prevent the adjusting sleeve 2 from moving upwards relative to the supporting tube portion 11 due to vibration or other factors and being disengaged from the supporting tube portion 11, as shown in fig. 8, a first limiting surface is configured on the outer wall of the supporting tube portion 11, the first limiting surface is disposed at an included angle with the axis of the supporting tube portion 11, a second limiting surface 220 parallel to the first limiting surface is disposed on the inner wall of the adjusting sleeve 2, and the second limiting surface 220 is located below the first limiting surface. By the cooperation of the second limiting surface 220 and the first limiting surface, the upward movement of the adjusting sleeve 2 relative to the supporting tube portion 11 can be limited, so that the supporting tube portion 11 is prevented from being separated from the adjusting sleeve 2.

It should be noted that, when the first rotary abutting surface 110 abuts against the second rotary abutting surface 210, the first limiting surface and the second limiting surface 220 may be disposed at intervals, so as to further reduce the contact area between the adjusting sleeve 2 and the supporting tube 11, and make the medical staff more labor-saving when rotating the adjusting sleeve 2.

Further, the outer wall of the support pipe portion 11 is provided with a first limit groove 1111, and the top side wall of the first limit groove 1111 is configured as a first limit surface; the inner wall of the adjusting sleeve 2 is convexly provided with a first limit protrusion 221, the first limit protrusion 221 is positioned in the first limit groove 1111, and the top side wall of the first limit protrusion 221 is configured as a second limit surface 220. By the cooperation of the first limiting projection 221 and the first limiting groove 1111, the adjusting sleeve 2 can be axially positioned along the supporting tube portion 11, so that the relative position of the adjusting sleeve 2 and the supporting tube portion 11 is more stable.

Here, the first limiting protrusion 221 and the upper and lower side surfaces and the bottom surface of the first limiting groove 1111 may be disposed at intervals to further reduce the contact friction.

In order to make the rotational engagement of the first rotational abutment surface 110 and the second rotational abutment surface 210 smoother, at least a portion of the support tube portion 11 configuring the first rotational abutment surface 110 is made of a self-lubricating material. By the self-lubricating material having the characteristic of self-lubrication, the sliding contact surface is not required to be lubricated, so that the medical staff can easily rotate the adjusting sleeve 2.

Alternatively, the self-lubricating material may be graphite, polytetrafluoroethylene, polyimide or poly-p-hydroxybenzoate.

In some embodiments, the portion of the adjusting sleeve 2 at least configuring the second rotary abutment surface 210 is made of a self-lubricating material, or the portion of the adjusting sleeve 2 at least configuring the second rotary abutment surface 210 and the portion of the supporting tube portion 11 at least configuring the first rotary abutment surface 110 are made of a self-lubricating material, which can reduce friction and achieve self-lubrication.

Further, in order to improve stability of the mounting post 3 during lifting, as shown in fig. 4 and 8, the mounting post 3 includes a sliding guide section 31, a screw fitting section 32, and a rotation guide section 33, which are sequentially connected from bottom to top. The spiral matching section 32 is in spiral matching with the adjusting sleeve 2, the sliding guide section 31 is arranged in the supporting tube portion 11 in a penetrating mode, the outer diameter of the sliding guide section 31 is matched with the inner diameter of the supporting tube portion 11, the sliding guide section is in sliding contact with the inner wall of the supporting tube portion 11, the sliding guide section 31 is limited to shake in the supporting tube portion 11, and structural stability is improved.

In this embodiment, the support tube portion 11 includes a support tube 111 and a first guide sleeve 112. The first guide sleeve 112 is fixedly arranged in the support tube 111, and a first limit groove 1111 and a first limit surface are formed on the outer side wall of the support tube 111. The first guide sleeve 112 includes a first sleeve body and a first rotational support flange. The first sleeve body is sleeved outside the sliding guide section 31 of the mounting column 3 and is in sliding contact with the sliding guide section 31 so as to provide guiding and positioning functions for the sliding guide section 31 and prevent the sliding guide section 31 from shaking in the first sleeve body. The first rotary support flange extends radially outwardly from a top edge of the first sleeve, a top end face of the first rotary support flange being configured as a first rotary abutment face 110. Wherein the first guide sleeve 112 is made of a self-lubricating material.

The support tube 111 is located outside the first guide sleeve 112 and cooperates with the first adapter anchor ear 22, on which a first limit groove 1111 is required to be formed, and as a support member in the support tube portion 11, the support tube 111 has a high strength requirement. The first guide sleeve 112 is matched with the mounting column 3 and the second rotary abutting surface 210, so that higher precision requirements are achieved. In the present embodiment, by dividing the support tube portion 11 into the support tube 111 and the first guide sleeve 112, the support tube 111 and the first guide sleeve 112 can be made of different materials. The supporting tube 111 may be made of a material with higher strength, so that the supporting tube has better bearing capacity after being grooved, and meets the use requirement. The first guide sleeve 112 is made of self-lubricating material, so that the amount of self-lubricating material is reduced, and the cost is reduced.

In addition, the first guide sleeve 112 is in sliding contact with the mounting column 3, so that lubrication can be performed not only on the first rotary abutting surface 110 and the second rotary abutting surface 210, but also on lifting lubrication of the mounting column 3, and the stability of height adjustment of the injection head can be improved.

Since the first guide sleeve 112 will be in direct contact with the mounting post 3, in order to avoid damage to the first guide sleeve 112 due to contact of the screw thread structure on the mounting post 3 with the first guide sleeve 112, as shown in fig. 8, the outer diameter of the screw fitting section 32 is larger than that of the sliding guide section 31. The inner side wall of the rotary sleeve 21 is convexly provided with a protective flange 212, the protective flange 212 is sleeved outside the sliding guide section 31, and the inner diameter of the protective flange 212 is smaller than the outer diameter of the spiral matching section 32. The above arrangement can block the screw fitting section 32 from contacting the first guide sleeve 112, thereby protecting the first guide sleeve 112 from damage.

Further, in order to prevent the mounting post 3 from rotating together with the rotating sleeve 21, as shown in fig. 9 and 10, the mounting post 3 further includes a first sliding portion 34, the first sliding portion 34 being provided on the sliding guide section 31 of the mounting post 3; the support column is provided with a second sliding part which is in sliding fit with the second sliding part along the vertical direction, so that the mounting column 3 can only vertically move under the drive of the rotary sleeve 21 and cannot rotate.

Specifically, the second sliding portion is a guide hole 1112 extending vertically, the top inner wall of the guide hole 1112 is a top limit surface 11121, and the bottom inner wall of the guide hole 1112 is a bottom limit surface 11122. The first sliding portion 34 is slidably disposed in the guide hole 1112, and the first sliding portion 34 contacts both side walls of the guide hole 1112. The first sliding portion 34 contacts with two side walls of the guide hole 1112, so that the first sliding portion 34 can be restricted from swinging in the guide hole 1112 along the horizontal direction, and accordingly stability of vertical sliding of the mounting column 3 is further improved, and rotation of the mounting column 3 is avoided.

When the mounting column 3 drives the injector head to rise to the highest position, the first sliding part 34 is abutted with the top limit surface 11121 of the guide hole 1112, and the mounting column 3 is limited to move upwards continuously, so that the upper stroke limit is realized; when the mounting column 3 drives the injector head to descend to the lowest position, the first sliding part 34 is abutted with the bottom limiting surface 11122 of the guide hole 1112, and the mounting column 3 is limited to move downwards continuously, so that the lower stroke limit is realized.

In order to avoid the first sliding portion 34 from affecting the mounting post 3 and the support tube portion 11, the first sliding portion 34 is detachably connected to the mounting post 3. Specifically, as shown in fig. 11, the outer side wall of the mounting post 3 is provided with an assembly hole, which includes a positioning hole section 311 and a slide-in hole section 312, the slide-in hole section 312 penetrates the bottom end face of the mounting post 3, and the width of the positioning hole section 311 is larger than the width of the slide-in hole section 312. The first sliding portion 34 is configured with two first fitting surfaces 3411 disposed opposite to each other and two second fitting surfaces 3412 disposed opposite to each other. The first fitting surfaces 3411 are fitted to the inner wall of the slide-in hole section 312, and the distance between the two first fitting surfaces 3411 is fitted to the width of the slide-in hole section 312. The second adapting surfaces 3412 are adapted to the inner wall of the positioning hole section 311, and the distance between the two second adapting surfaces 3412 is adapted to the width of the positioning hole section 311. When the first sliding portion 34 is assembled with the mounting post 3, the first sliding portion 34 may be slid into the sliding hole section 312 in a state in which the first fitting surface 3411 is parallel to the inner wall of the sliding hole section 312, and then into the positioning hole section 311, and then the angle of the first sliding portion 34 is adjusted so that the second fitting surface 3412 is parallel to the inner wall of the positioning hole section 311, thereby preventing the first sliding portion 34 from being separated from the mounting hole.

In this embodiment, the first sliding portion 34 includes an inner shaft 341, and the first adapting surface 3411 and the second adapting surface 3412 are both disposed on the inner shaft 341. As shown in fig. 11, the positioning hole section 311 is a circular hole, and the slide-in hole section 312 is a rectangular hole, the width of which is smaller than the diameter of the circular hole. The first fitting surfaces 3411 are flat surfaces that fit the side walls of the rectangular hole, and the distance between the two first fitting surfaces 3411 is adapted to the width of the sliding hole section 312, so that the inner shaft 341 can slide into the sliding hole section 312 and, as shown in fig. 12, enter the positioning hole section 311 from the sliding hole section 312.

Thereafter, as shown in fig. 13, the inner shaft 341 is rotated so that the second mating surface 3412 on the inner shaft 341 engages the inner wall of the circular hole. In order to prevent the inner shaft 341 from being separated from the mounting post 3 along the axial direction thereof, as shown in fig. 14, one end of the inner shaft 341 is further provided with a limiting shoulder 3413. When the inner shaft 341 slides into the positioning hole section 311, the limiting shoulder 3413 is abutted against the inner wall of the mounting post 3, and then the inner shaft 341 is rotated, so that the second adapting surface 3412 on the inner shaft 341 is abutted against the inner wall of the positioning hole section 311. Because the distance between the two second adapting surfaces 3412 is greater than the width of the sliding hole section 312, the inner shaft 341 cannot be separated from the mounting column 3 under the action of gravity, so that the primary fixation of the inner shaft 341 and the mounting column 3 is realized.

In order to further fix the inner shaft 341 with the mounting post 3, as shown in fig. 15, the first sliding portion 34 further includes a boss 343 and a locking member 342. The shaft sleeve 343 is sleeved at one end of the inner shaft 341 extending out of the mounting column 3 and is abutted against the outer wall of the mounting column 3; the locking member 342 removably connects the boss 343 and the inner shaft 341. Wherein the locking member 342 is a screw. The rod portion of the locking member 342 passes through the shaft sleeve 343 and is fixedly connected with the inner shaft 341, and the head portion of the locking member 342 abuts against the shaft sleeve 343. Through the locking force of the locking piece 342, the shaft sleeve 343 is abutted against the outer wall of the mounting column 3, the limiting shaft shoulder 3413 is abutted against the inner wall of the mounting column 3, and the inner shaft 341 and the shaft sleeve 343 are respectively fixed with the mounting column 3.

Further, in order to reduce the friction force that the first sliding portion 34 receives when sliding in the guide hole 1112, the first sliding portion 34 further includes a rotating member 344. The rotating member 344 is rotatably sleeved outside the shaft sleeve 343, and the rotating member 344 is in rolling contact with the inner wall of the guide hole 1112. By providing the rotating member 344, the first sliding portion 34 can be brought into rolling contact with the side wall of the guide hole 1112, the rolling friction force is small, the resistance of the mounting column 3 to be lifted can be reduced, and the wear of the guide hole 1112 or the first sliding portion 34 can be reduced.

In order to prevent the rotating member 344 from being separated from the shaft sleeve 343, a limiting flange is disposed at one end of the shaft sleeve 343 away from the mounting post 3, and the rotating member 344 is disposed between the limiting flange and the mounting post 3 to limit the relative position of the rotating member 344 and the shaft sleeve 343 along the axial direction thereof, so as to prevent the rotating member 344 from being separated from the shaft sleeve 343.

In order to facilitate the abutment of the axial end surfaces of the rotating member 344 and the shaft sleeve 343 with the sliding guide section 31, the outer circumferential surface of the sliding guide section 31 is further provided with a mounting plane 313, and the mounting hole is provided on the mounting plane 313, so that the axial end surfaces of the rotating member 344 and the shaft sleeve 343 can be in surface contact with the mounting plane 313, thereby improving structural stability.

The first sliding part 34 in the embodiment is of a detachable structure and is formed by combining a plurality of parts, so that the parts can be independently replaced, and the maintenance cost is reduced; and the first sliding part 34 is convenient to assemble and disassemble with the mounting column 3, and the first sliding part 34 can be assembled and disassembled with the mounting column 3 through the guide hole from the outside of the supporting tube part 11, so that the height adjusting device 300 is convenient to assemble and disassemble.

Further, the rotating member 344 is formed of a self-lubricating material to provide lubrication for rolling contact of the rotating member 344 with the guide aperture 1112 to avoid rattling of the rotating member 344 as it rolls within the guide aperture 1112.

When the height of the injection head needs to be adjusted, the first adapter hoop 22 and the rotating sleeve 21 in the adjusting sleeve 2 rotate in the same direction on the assumption that the adjusting sleeve 2 is screwed clockwise with a torque T. During rotation of the rotating sleeve 21, the second rotating abutment surface 210 will abut downward against the first rotating abutment surface 110 due to gravity and remain in contact with and rotate against the first rotating abutment surface 110. The rotating sleeve 21 transmits torque T to the mounting post 3 by screw engagement with the mounting post 3. Due to the cooperation of the first sliding portion 34 and the guide hole 1112, the first sliding portion 34 will restrict the rotation of the mounting post 3 with the rotation sleeve 21, so that the mounting post 3 can only move linearly under the action of the screwing torque T.

Further, as shown in fig. 16, the height adjusting device 300 further includes a housing assembly 4, and the housing assembly 4 is sleeved outside the adjusting sleeve 2 and fixed with the first adapter hoop 22 in the adjusting sleeve 2 so as to enable the two to rotate synchronously. By providing the housing assembly 4, the height adjustment device 300 can be made more aesthetically pleasing, and the first adapter hoop 22, the swivel case 21, and the mounting post 3 can be protected to reduce the failure rate of the height adjustment device 300.

Specifically, the housing assembly 4 includes a rotating housing 41, the rotating housing 41 being secured to the first adapter hoop 22. To further facilitate the operation of the medical staff, the outer surface of the rotary housing 41 is provided with a cylindrical surface to facilitate the holding operation of the medical staff and avoid the scratching of the medical staff by the edges and corners.

As shown in fig. 17, the rotary housing 41 includes a first half-shell 412, a second half-shell 413, and a first fastener 415, the first half-shell 412 and the second half-shell 413 are detachably connected in the circumferential direction, the first half-shell 412 and the second half-shell 413 are each provided with the first fastener 415, and the first fastener 415 is used for being fixed with the first adapter hoop 22, so that the rotary housing 41 and the rotary sleeve 21 can rotate synchronously. By dividing the rotary housing 41 into the first half-shell 412 and the second half-shell 413 which are detachable, the rotary housing 41 is easily detached for maintenance of the structure inside the rotary housing 41. Alternatively, the first fastener 415 may be a screw or pin.

In this embodiment, the rotary housing 41 and the first adapter hoop 22 need to bear a certain torque force to drive the rotary sleeve 21 to rotate. In order to avoid the relative rotation between the rotary housing 41 and the first adapter hoop 22, as shown in fig. 18, the outer peripheral surface of the first adapter hoop 22 is concaved inwards to form a first step surface 223, correspondingly, the inner wall of the rotary housing 41 is convexly arranged inwards to form a second step surface 416, the shape and the size of the second step surface 416 are adapted to those of the first step surface 223, and the second step surface 416 can be abutted against the first step surface 223 along the circumferential direction of the rotary sleeve 21.

When the second step surface 416 abuts against the second step surface 416, the first rotating hoop 22 and the rotating housing 41 can be restricted from rotating relatively, and the torsion force can be borne by the first step surface 223 and the second step surface 416, so that compared with the torsion force borne by the friction force of the screw after shearing or screwing, the torsion force bearing capability can be improved, and on the other hand, the screw can be prevented from loosening due to rotation in the forward and reverse directions. This kind of cooperation structure can guarantee that the swivel housing 41 can not take place to skid with first joint staple bolt 22, but also can guarantee the reliability of structural connection.

Further, two first step surfaces 223 are respectively arranged on the first half sleeve and the second half sleeve of the first adapter hoop 22, correspondingly, two second step surfaces 416 are respectively arranged on the first half shell 412 and the second half shell 413, and the torsion bearing capacity and the reliability of the connecting structure can be further improved through the abutting fit of the four step surfaces.

As shown in fig. 19, in order to improve the sealability of the first half shell 412 and the second half shell 413, the first half shell 412 has a first abutting surface, the second half shell 413 has a second abutting surface abutting against the first abutting surface, both the first abutting surface and the second abutting surface extend in the axial direction of the rotary housing 41, and a seal 44 is provided between the first abutting surface and the second abutting surface. By providing a seal 44 to seal the docking aperture, contrast agent or saline is prevented from entering the swivel housing 41 through the docking aperture. Specifically, the seal 44 is elongated to seal the splice gap between the first half-shell 412 and the second half-shell 413 in the axial direction of the rotary housing 41. Optionally, the seal 44 is a long cylinder.

Because the first half shell 412 is provided with two first butt joint surfaces, and the second half shell 413 is provided with two second butt joint surfaces, the first half shell 412 and the second half shell 413 have two splicing gaps, and therefore, sealing elements 44 are arranged in each splicing gap, that is, sealing elements 44 are arranged between each group of first butt joint surfaces and each group of second butt joint surfaces.

To facilitate positioning of the seal 44, as shown in fig. 20, one of the first abutment surface and the second abutment surface is provided with a seal groove 4125, and the other of the first abutment surface and the second abutment surface can press the seal 44 against the seal groove 4125 to sufficiently deform the seal 44 to enhance the sealing effect. Alternatively, the seal 44 may be adhesively secured within the seal groove 4125.

To improve the assembly accuracy of the first and second half-shells 412 and 413, one of the first and second mating surfaces is provided with a mating protrusion 4121, and the other is provided with a mating groove 4131, and the mating protrusion 4121 can be inserted into the mating groove 4131 to guide the first and second half-shells 412 and 413 to be mated, thereby improving the assembly accuracy.

Further, the outer wall of the abutment boss 4121 is configured with a boss abutment surface, and the inner wall of the abutment recess 4131 is configured with a recess abutment surface. When the first half shell 412 and the second half shell 413 are assembled, the protrusion butt joint and the groove butt joint surface are abutted and can slide relatively, and the unique butt joint direction of the first half shell 412 and the second half shell 413 can be determined through the butt joint cooperation of the protrusion butt joint surface and the groove butt joint surface, so that the first half shell 412 and the second half shell 413 can be positioned quickly. The convex butt-joint surface can be a convex curved surface, and the concave butt-joint surface is a concave curved surface matched with the convex curved surface so as to limit a unique butt-joint direction.

Further, both the first abutment surface and the second abutment surface may be stepped surfaces. Wherein the first abutting surface comprises a first radially extending surface 4122, a first axially extending surface 4123 and a second radially extending surface 4124 which are sequentially connected from outside to inside, and the second abutting surface comprises a third radially extending surface 4132, a third axially extending surface and a fourth radially extending surface 4134 which are sequentially connected from outside to inside, wherein the abutting convex portion 4121 is disposed on the second radially extending surface 4124, and the abutting concave portion 4131 is disposed on the fourth radially extending surface 4134.

When the first half shell 412 and the second half shell 413 are butted, as shown in fig. 21, the first radially extending surface 4122 abuts against the third radially extending surface 4132, and the first axially extending surface is spaced apart from the second axially extending surface 4133. The fourth radially extending surface 4134 presses the seal 44 against the seal groove 4125 to deform the seal 44, and the fourth radially extending surface 4134 is also able to abut the second radially extending surface 4124. Through setting up two butt joint faces into the step face, can further improve the butt joint precision, and can form labyrinth seal structure, further improve sealed effect.

In order to further improve the synchronism between the rotary housing 41 and the rotary sleeve 21, as shown in fig. 22, an abutment rib 411 is formed on the inner wall of the rotary housing 41, and after the rotary housing 41 is fixed to the first rotating hoop 22, the abutment rib 411 abuts against the outer wall of the rotary sleeve 21, so that the rotary sleeve 21 contacts with the rotary housing 41, and the synchronous rotation of the rotary housing 41 and the rotary sleeve 21 is further ensured by the static friction force between the two. In addition, the abutment rib 411 can also improve the rigidity of the rotary case 41.

Because the first half shell 412 and the second half shell 413 need to be in butt fit, if the contact area between the abutment rib 411 and the rotating sleeve 21 is large, the abutment rib 411 and the rotating sleeve 21 may be inadequately attached due to machining and assembly errors, even the first housing and the second housing cannot be locked, or the sealing of the first half shell 412 and the second half shell 413 may be unreliable. For this reason, in the present embodiment, the contact surface between the abutment rib 411 and the rotating sleeve 21 is a narrow surface, that is, the dimension of the abutment rib 411 along the axial direction of the rotating sleeve 21 is smaller, so as to reduce the contact area between the abutment rib 411 and the rotating sleeve 21, thereby ensuring that the first half shell 412 and the second half shell 413 are reliably locked while ensuring that the abutment rib 411 is tightly attached to the rotating sleeve 21.

Because the first half shell 412 and the second half shell 413 are detachably connected to the first adapter hoop 22 by the first fastening member 415, the first fastening member 415 is exposed, so that the outer surface of the rotary housing 41 is not attractive. To this end, the housing assembly 4 further includes a shielding sleeve 42 that is sleeved over the rotating housing 41 to shield the first fastener 415. In this embodiment, the first half shell 412 and the second half shell 413 are fixed at the upper and lower ends by the first fastening members 415, and for this purpose, the shielding sleeve 42 is provided with two parts, which are respectively sleeved at the upper and lower ends of the rotary housing 41, so that the housing assembly 4 is more beautiful.

When the shielding sleeve 42 is sleeved on the upper end and the lower end of the rotary housing 41, the inner wall of the shielding sleeve 42 is tightly attached to the outer wall of the rotary housing 41 in order to ensure that the shielding sleeve 42 is fixed to the rotary housing 41 without using any fastening member. In addition, the shielding sleeve 42 is tightly fitted to the rotary housing 41 to prevent liquid such as physiological saline and contrast agent from entering the rotary housing 41, and to prevent liquid such as physiological saline and contrast agent from corroding the first fastening member 415 or its fitting position.

The assembly process of the height adjusting apparatus 300 provided in this embodiment is as follows:

1. the first guide sleeve 112 is installed in the support tube 111 along the axial direction thereof, and the first rotary support flange of the first guide sleeve 112 is abutted against the top end surface of the support tube 111;

2. the mounting post 3 is mounted in the first guide sleeve 112 in the axial direction of the support tube 111, and the mounting hole of the mounting post 3 is located at the guide hole 1112 of the support tube 111 so as to mount the first sliding portion 34.

The first sliding portion 34 is installed in the following manner:

sliding the inner shaft 34 into the sliding hole section 312 and the positioning hole section 311 in sequence in a posture in which the first fitting surface 3411 is parallel to the inner wall of the sliding hole section 312; the limiting shaft shoulder 3413 is abutted against the inner wall of the mounting column 3, and then the inner shaft 341 is rotated to enable the second adapting surface 3412 on the inner shaft 341 to be abutted against the inner wall of the positioning hole section 311; the rotating piece 344 is sleeved outside the shaft sleeve 343, and the rotating piece 344 and the shaft sleeve 343 are sleeved at one end of the inner shaft 341 extending out of the mounting column 3 together, so that the shaft sleeve 343 is abutted against the outer wall of the mounting column 3; the locker 342 is then fixed to the inner shaft 341.

3. Screwing the rotary sleeve 21 out of the mounting column 3 along the axial direction of the mounting column 3, so that the rotary sleeve 21 is matched with the spiral matching section 32, and the second rotary abutting surface 210 on the rotary sleeve 21 is abutted downwards with the first rotary abutting surface 110;

4. the second limiting boss 222 on the first switching anchor ear 22 is aligned with the second limiting groove 211 on the rotary sleeve 21, the first limiting boss 221 is aligned with the first limiting groove 1111 on the supporting tube 111, and then the second fastening piece 224 on the first switching anchor ear 22 is screwed into the rotary sleeve 21, so that the first switching anchor ear 22 and the rotary sleeve 21 are fixed.

5. The sealing piece 44 is fixed in the sealing groove 4125 by gluing, and the two shielding sleeves 42 are sleeved outside the adjusting sleeve 2;

mating the second stepped surface 416 of the swivel housing 41 with the first stepped surface 223 of the first swivel anchor 22;

the first fastener 415 passes through the first half shell or the second half shell to fix the first half sleeve and the second half sleeve of the first switching hoop 22 along the circumferential direction, so that the locking of the rotary shell 41 and the second switching hoop 22 is realized.

6. The shielding sleeves 42 are fitted over both ends of the rotary housing 41 to shield the first fastening member 415 and the second fastening member 224.

It should be noted that the height adjusting device 300 of the present invention may be used in other devices, and is not limited to a high-pressure syringe. The mounting posts in the height adjustment device 300 may be placed horizontally or may be placed obliquely.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. 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 invention are desired to be protected by the following claims.

Claims

1. A height adjustment device, comprising:

a fixed seat (1);

the adjusting sleeve (2) is arranged on the fixing seat (1), and the adjusting sleeve (2) can rotate around the axis of the adjusting sleeve;

the mounting column (3) is arranged in the adjusting sleeve (2) in a penetrating mode and matched with the adjusting sleeve (2), and the mounting column (3) is configured to move along the axial direction of the mounting column (3) when the adjusting sleeve (2) rotates relative to the fixing seat (1);

the fixing seat (1) comprises a support tube part (11), the adjusting sleeve (2) is rotatably sleeved outside the support tube part (11) and is axially fixed with the support tube part (11), and at least part of the mounting column (3) can extend into the support tube part (11);

The top end face of the supporting tube part (11) is a first rotary abutting face (110), a second rotary abutting face (210) parallel to the first rotary abutting face (110) is formed on the inner wall of the adjusting sleeve (2), and the second rotary abutting face (210) abuts against the first rotary abutting face (110) and can rotate relative to the first rotary abutting face (110);

a first limiting surface is formed on the outer wall of the supporting tube part (11), an included angle is formed between the first limiting surface and the axis of the supporting tube part (11), a second limiting surface (220) parallel to the first limiting surface is arranged on the inner wall of the adjusting sleeve (2), and the second limiting surface (220) is positioned below the first limiting surface;

the adjusting sleeve (2) comprises:

the rotating sleeve (21) is sleeved outside the mounting column (3) and is in spiral fit with the mounting column (3), and the bottom end surface of the rotating sleeve (21) is configured to be the second rotating abutting surface (210);

the first connecting hoop (22) is hooped outside the rotary sleeve (21) and sleeved outside the supporting tube part (11), and the inner side wall of the first connecting hoop (22) and the outer side wall of the supporting tube part (11) are arranged at intervals;

The mounting column (3) is provided with a first sliding part (34), the fixing seat (1) is provided with a second sliding part, and the first sliding part (34) is in sliding fit with the second sliding part along the vertical direction;

the second sliding part is a guide hole (1112) extending vertically, the first sliding part (34) is arranged in the guide hole (1112) in a sliding mode, and the first sliding part (34) is in contact with two side walls of the guide hole (1112).

2. The height adjustment device according to claim 1, wherein at least the portion of the support tube portion (11) configuring the first rotary abutment face (110) is made of a self-lubricating material;

and/or at least the portion of the adjustment sleeve (2) constituting the second rotary abutment face (210) is made of a self-lubricating material.

3. The height adjusting device according to claim 1, wherein the mounting column (3) comprises a sliding guide section (31) and a screw fitting section (32) which are sequentially connected from bottom to top, the screw fitting section (32) is screw-fitted with the adjusting sleeve (2), and an inner side wall of the support tube portion (11) is in sliding contact with the sliding guide section (31).

4. A height adjustment device according to claim 3, wherein the support tube portion (11) comprises a support tube (111) and a first guide sleeve (112), the first guide sleeve (112) being fixedly arranged in the support tube (111), the first guide sleeve (112) comprising:

the first sleeve body is sleeved outside the sliding guide section (31) and is in sliding contact with the mounting column (3);

a first rotary support flange extending radially outwardly from a top edge of the first sleeve, a top end face of the first rotary support flange configured as a first rotary abutment face (110);

the first guide sleeve (112) is made of a self-lubricating material.

5. A height adjusting device according to claim 3, wherein the outer diameter of the screw fitting section (32) is larger than the outer diameter of the sliding guide section (31), the inner side wall of the adjusting sleeve (2) is convexly provided with a protective flange (212), the protective flange (212) is sleeved outside the sliding guide section (31), and the inner diameter of the protective flange (212) is smaller than the outer diameter of the screw fitting section (32).

6. The height adjustment device according to claim 1, characterized in that the outer wall of the support tube portion (11) is provided with a first limit groove (1111), the top side wall of the first limit groove (1111) being configured as the first limit surface;

The inner wall of the adjusting sleeve (2) is convexly provided with a first limiting protruding portion (221), the first limiting protruding portion (221) is located in the first limiting groove (1111), and the top side wall of the first limiting protruding portion (221) is configured to be the second limiting surface (220).

7. The height adjusting device according to claim 1, wherein one of the outer wall of the rotating sleeve (21) and the inner wall of the first rotating hoop (22) is provided with a second limit protrusion (222), and the other is provided with a second limit groove (211), and the second limit protrusion (222) extends into the second limit groove (211).

8. The height adjustment device according to any one of claims 1-7, further comprising a housing assembly (4), wherein the housing assembly (4) is sleeved outside the adjustment sleeve (2) and is fixed to the adjustment sleeve (2), and wherein the housing assembly (4) can drive the adjustment sleeve (2) to rotate.

9. The height adjusting device according to claim 8, wherein a first step surface (223) is concavely formed on the circumferential side wall of the adjusting sleeve (2), a second step surface (416) is convexly formed on the inner wall of the housing assembly (4) inwards, and the second step surface (416) can abut against the first step surface (223) along the circumferential direction of the adjusting sleeve (2) so as to transmit torque.

10. The height adjustment device according to claim 8, wherein the housing assembly (4) comprises a rotating housing (41), the rotating housing (41) comprising a first half-shell (412), a second half-shell (413) and a first fastener (415), the first half-shell (412) and the second half-shell (413) being connected detachably in the circumferential direction, the first fastener (415) being connected to both the first half-shell (412) and the second half-shell (413), the first fastener (415) being for detachable connection with the adjustment sleeve (2).

11. The height adjustment device according to claim 10, wherein the first half-shell (412) has a first abutment surface and the second half-shell (413) has a second abutment surface abutting the first abutment surface, a seal (44) being provided between the first abutment surface and the second abutment surface.

12. The height adjustment device according to claim 11, wherein one of the first abutment surface and the second abutment surface is provided with an abutment protrusion (4121) and the other is provided with an abutment recess (4131), the abutment protrusion (4121) being configured with a protruding abutment surface, the inner wall of the abutment recess (4131) being configured with a recessed abutment surface along which the protruding abutment surface can slide such that the abutment protrusion (4121) protrudes into the abutment recess (4131).

13. The height adjustment device according to claim 10, wherein the housing assembly (4) further comprises a shielding sleeve (42), the shielding sleeve (42) being sleeved outside the rotating housing (41) to shield the first fastener (415).

14. The height adjustment device according to any one of claims 1-7, wherein the height adjustment device is hollow to form a routing cavity for mounting a cable.

15. The height adjustment device according to claim 14, wherein the outer wall of the holder (1) is provided with a wire holder (13), the wire holder (13) being configured to hold a wire extending out of the wire cavity after bending from the bottom of the wire cavity.

16. The height adjustment device according to any one of claims 1-7, wherein the mounting post (3) is hollow, wherein a mounting hole is provided on the outer side wall of the mounting post (3), the mounting hole comprises a positioning hole section (311) and a sliding hole section (312), the sliding hole section (312) penetrates through the bottom end surface of the mounting post (3), and the width of the positioning hole section (311) is larger than the width of the sliding hole section (312);

The first sliding part (34) is provided with two first matching surfaces (3411) which are arranged oppositely and two second matching surfaces (3412) which are arranged oppositely;

the first adapting surfaces (3411) are adapted to the inner wall of the sliding-in hole section (312), and the distance between the two first adapting surfaces (3411) is adapted to the width of the sliding-in hole section (312);

the second adapting surfaces (3412) are adapted to the inner wall of the positioning hole section (311), and the distance between the two second adapting surfaces (3412) is adapted to the width of the positioning hole section (311).

17. The height adjustment device according to claim 16, wherein the first sliding portion (34) comprises:

an inner shaft (341), wherein a limiting shaft shoulder (3413) is configured at one end of the inner shaft (341), the first adapting surface (3411) and the second adapting surface (3412) are both arranged on the inner shaft (341), and the limiting shaft shoulder (3413) is abutted against the inner wall of the mounting column (3);

a shaft sleeve (343) sleeved at one end of the inner shaft (341) extending out of the mounting column (3) and abutting against the outer wall of the mounting column (3);

and a locking member (342) for detachably connecting the sleeve (343) and the inner shaft (341).

18. The height adjusting device according to claim 17, wherein the first sliding portion (34) further comprises a rotating member (344) rotatably sleeved outside the shaft sleeve (343), and the rotating member (344) is in rolling contact with an inner wall of the guide hole (1112).

19. The height adjustment device according to claim 18, wherein the swivel member (344) is made of a self-lubricating material.

20. A high pressure injector, characterized by comprising an injector head (500) and a height adjustment device according to any of claims 1-19, the mounting post (3) being adapted to drive the injector head (500) up and down.