CN114379981A

CN114379981A - Clamping device

Info

Publication number: CN114379981A
Application number: CN202011124894.7A
Authority: CN
Inventors: 刘华勇; 万文杰; 卢艺; 赵鹏仕; 邓南方
Original assignee: Shenzhen Mindray Scientific Co Ltd
Current assignee: Shenzhen Mindray Scientific Co Ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2022-04-22

Abstract

The utility model provides a clamping device, includes the clamping body, connecting rod and locking Assembly, the clamping body includes mount pad, first clamp and second clamp, locking Assembly includes first retaining member, second retaining member and regulating part, first retaining member sets up on the mount pad, second retaining member and regulating part movably set up on the connecting rod, the regulating part is connected with the second retaining member, the regulating part is used for driving the second retaining member and switches between retaining member and unblock position. The clamping body is connected with a locking assembly with an adjusting piece, the adjusting piece can drive the locking assembly to lock and unlock the second clamping body, the second clamping body cannot move in a locking state, and the second clamping body can freely move in an unlocking state; make the doctor use clamping device to carry out the clamping or when dismantling devices such as syringe pump, only need grip clamping device through one's body to just can realize the locking and the unblock of second clamp through pointing the operation regulating part, thereby this clamping device uses conveniently, labour saving and time saving.

Description

Clamping device

Technical Field

The invention relates to a medical auxiliary device, in particular to a clamping device for clamping a medical device.

Background

In a medical site, doctors need to clamp and transport the injection pump, the infusion pump and the assembly thereof, for example, the injection pump, the infusion pump and the assembly thereof are clamped by a manually portable clamping device. According to the traditional clamping device, a doctor can clamp and disassemble the injection pump, the infusion pump and the combined part of the infusion pump and the infusion pump only by operating the clamping device with two hands, and the use process is not convenient and wastes time and labor.

Disclosure of Invention

The invention mainly solves the technical problem.

In one embodiment, there is provided a clamping device comprising

The clamping body comprises an installation seat, a first clamping body and a second clamping body, the first clamping body is arranged on the installation seat, the second clamping body is movably arranged on the installation seat, and the first clamping body and the second clamping body are jointly used for clamping an object to be clamped;

the connecting rod is axially movably arranged on the mounting seat, and one end of the connecting rod is connected with the second clamp body and used for driving the second clamp body to move relative to the first clamp body;

the locking assembly comprises a first locking part, a second locking part and an adjusting part, the first locking part is arranged on the mounting seat, the second locking part and the adjusting part are movably arranged on the connecting rod, the adjusting part is connected with the second locking part, and the adjusting part is used for driving the second locking part to be switched between a locking part and an unlocking position; in the locking state, the second locking piece is connected with the first locking piece; and under the unlocking state, the second locking piece is separated from the first locking piece.

In one embodiment, the first locking member comprises an outer sleeve having internal threads, the connecting rod being threaded into the outer sleeve; the second retaining member includes the tooth piece, be equipped with radial mounting groove on the connecting rod, but tooth piece radial movement installs in the mounting groove of connecting rod, the regulating part is used for rotating preset angle drive the tooth piece along mounting groove radial movement with the internal thread engagement of outer sleeve is connected or is separated.

In one embodiment, the tooth blocks have at least two blocks uniformly distributed along the same circumferential direction, the adjusting member is connected with all the tooth blocks, and the adjusting member is used for adjusting all the tooth blocks to move simultaneously.

In one embodiment, the adjusting part comprises a rotating shaft, an eccentric wheel and a toggle part, a mounting hole communicated with the mounting groove is formed in the connecting rod, the rotating shaft is rotatably arranged in the mounting hole of the connecting rod, the rotating shaft penetrates through the mounting groove, the eccentric wheel is mounted on the part, located in the mounting groove, of the rotating shaft, the gear block is provided with a mounting hole, and the eccentric wheel is clamped in the mounting hole of the gear block; the connecting rod is further provided with an opening communicated with the mounting hole, the poking piece is installed on the connecting rod, a slotted hole is formed in the connecting piece and communicated with the mounting hole, the poking piece is connected with the rotating shaft through the slotted hole, the slotted hole is provided with a rotating interval of the poking piece, and the poking piece drives the tooth block to move along the radial direction of the mounting groove through the rotating shaft and the eccentric wheel.

In one embodiment, the adjusting part further comprises a torsion spring, the torsion spring is sleeved on the rotating shaft, the torsion spring is further connected with the connecting rod, and the torsion spring is used for driving the rotating shaft, the eccentric wheel, the stirring part and the toothed block to reset.

In one embodiment, the radial length of the toggle piece is greater than the maximum radial length of the eccentric wheel.

In one embodiment, one surface of the tooth block facing the rotating shaft is provided with two connecting parts which are spaced from each other, each connecting part is provided with a mounting hole, and the mounting hole of each connecting part is internally connected with one eccentric wheel; the connecting parts of the plurality of tooth blocks are connected on the rotating shaft in a staggered manner.

In one embodiment, the axial width of the mounting groove is matched with the axial width of the tooth block, and the mounting groove is used for limiting the axial degree of freedom of the tooth block.

In one embodiment, the first locking member is an outer sleeve having internal teeth, and the connecting rod is inserted into the outer sleeve; the second retaining member is a rotary joint piece, and the rotary joint piece is used for being connected with or separated from the inner teeth of the outer sleeve.

In one embodiment, the internal teeth of the outer sleeve are unidirectional teeth.

In one embodiment, the adjusting part comprises a sleeve shaft, a pressing cylinder and a restoring part, a shaft shoulder and an external thread are arranged on the connecting rod, the pressing cylinder and the sleeve shaft are sleeved on the connecting rod, one end of the pressing cylinder abuts against the shaft shoulder, an accommodating cavity is arranged at the end, away from the pressing cylinder, of the pressing cylinder, an internal thread is arranged on the sleeve shaft, the internal thread of the sleeve shaft is meshed and connected with the external thread of the connecting rod, and one end of the sleeve shaft can move into the accommodating cavity of the pressing cylinder; the sleeve shaft is provided with a mounting groove, the rotary clamping piece is mounted in the mounting groove of the sleeve shaft, one end of the rotary clamping piece is rotatably connected with the sleeve shaft, the other end of the rotary clamping piece is a free end, the restoring piece is arranged on the sleeve shaft, and the restoring piece is connected with the free end of the rotary clamping piece; the restoring piece is used for driving the free end of the rotating clamping piece to pop up and be connected with the one-way teeth of the outer sleeve, and the pressing cylinder is used for pressing the rotating clamping piece back so as to enable the free end of the rotating clamping piece to be separated from the one-way teeth of the outer sleeve.

In one embodiment, the restoring member is a spring or a spring.

In one embodiment, the adjusting member further comprises a spring disposed between the pressing cylinder and the sleeve shaft.

In one embodiment, a holding handle is installed at one end, far away from the installation seat, of the connecting rod.

In one embodiment, the second clamp body is rotatably connected to an end of the connecting rod and has a clearance axially adjustable with respect to the connecting rod.

In one embodiment, the mounting seat and the second clamp body are respectively provided with a linear guide groove and a linear protrusion, and the linear protrusion is slidably connected in the linear guide groove; the connecting rod is rotatably connected with the second clamp body.

In one embodiment, the first clamp body and the mounting seat are of an integrated structure.

According to the clamping device of the embodiment, the clamping body is connected with the locking assembly with the adjusting piece, the adjusting piece can drive the locking assembly to lock and unlock the second clamping body, the second clamping body cannot move in the locking state, and the second clamping body can freely move in the unlocking state; make the doctor use clamping device to carry out the clamping or when dismantling devices such as syringe pump, only need grip clamping device through one's body to just can realize the locking and the unblock of second clamp through pointing the operation regulating part, thereby this clamping device uses conveniently, labour saving and time saving.

Drawings

FIG. 1 is a schematic view of a clamping device according to an embodiment;

FIG. 2 is an axial cross-sectional view of a clamping device in one embodiment;

FIG. 3 is a schematic structural view of a connecting rod according to an embodiment;

FIG. 4 is a schematic structural view of a locking assembly in one embodiment;

FIG. 5 is a schematic structural view of an eccentric wheel according to an embodiment;

FIG. 6 is an axial cross-sectional view of a clamping device in one embodiment;

FIG. 7 is a schematic view showing the structure of a clamping device according to an embodiment;

FIG. 8 is an axial cross-sectional view of a clamping device in one embodiment;

FIG. 9 is an axial cross-sectional view of a clamping device in one embodiment;

FIG. 10 is a partial schematic view of a clamping device according to an embodiment.

Detailed Description

Traditional clamping device includes mount pad, fixed clamp and removes the clamp, and fixed clamp fixed mounting removes the clamp and is connected with the screw rod on the mount pad, screw rod and mount pad threaded connection, and the screw rod rotary drive removes the removal of clamp. When a doctor operates the clamping device to clamp, the doctor needs to hold the mounting seat of the clamping device with one hand and rotate the screw rod with the other hand, so that the clamping device can be moved to clamp or loosen devices such as an injector and the like relative to the fixed clamp body, and the operation is inconvenient. Moreover, the moving stroke of the moving clamp body for loosening or clamping is completely realized by the rotation of the screw rod, so that the moving clamp body always moves slowly, and therefore, long operation time is consumed.

Therefore, the applicant improves the clamping device, adds the locking device which can be used for locking the movable clamp body, the movable clamp body can move freely in the unlocking state, and the movable clamp body can be rotationally driven to clamp or unlock in the locking state, namely the moving state of the movable clamp body is divided into a free state of moving in any large stroke and a locking and unlocking state of moving in a small range, and the clamping efficiency of the clamping device is further improved. In addition, after the locking device is arranged, clamping and locking of the clamping device can be operated by one hand, and the obtained clamping device is convenient to operate.

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

Referring to fig. 1 to 6, in one embodiment, a clamping device is provided, which includes a clamping body 10, a connecting rod 20 and a locking assembly 30.

The clamping body 10 comprises a mounting seat 11, a first clamping body 12 and a second clamping body 13, the first clamping body 12 is a fixed clamping body, the second clamping body 13 is a movable clamping body, the first clamping body 12 and the mounting seat 11 are of an integrated structure, and the first clamping body 12 can also be fixed on the mounting seat 11 by welding or screw fixation and other modes. The second clamp body 13 is movably arranged on the mounting seat 11, the second clamp body 13 can move relative to the first clamp body 12, and then the medical device can be clamped by the cooperation of the first clamp body 12 and the second clamp body 13.

The connecting rod 20 is a rotating shaft structure, the mounting seat 11 is provided with a mounting portion 111, the mounting portion 111 and the first clamping body 12 are oppositely arranged at intervals, a mounting hole is formed in the mounting portion 111, the connecting rod 20 penetrates through the mounting hole of the mounting portion 111, and the connecting rod 20 can axially move. The second clamp body 13 is mounted on the end of the connecting rod 20, and the second clamp body 13 is located between the mounting portion 111 and the first clamp body 12, the connecting rod 20 and the second clamp body 13 move simultaneously, and the connecting rod 20 can also rotate relative to the second clamp body 13.

The linear guide rail 112 is arranged on the mounting seat 11, the linear guide rail 112 is arranged between the mounting portion 111 and the first clamp body 12, the second clamp body 13 is provided with a guide groove 131 matched with the linear guide rail 112, the second clamp body 13 is slidably clamped on the linear guide rail 112 through the guide groove 131, the cross section of the linear guide rail 112 can be square, triangular or dovetail-shaped, and the like, and the guide groove 131 has a shape complementary with the linear guide rail 112. The linear guide 112 and the guide groove 131 are matched to limit the radial degree of freedom of the second clamp 13, so that the clamping and moving stability of the second clamp 13 is improved. Or, in other embodiments, the mounting seat 11 is provided with a linear guide groove, the second clamp body 13 is provided with a protrusion adapted to the linear guide groove, and the stability of the movement of the second clamp body 13 can also be improved through the matching of the protrusion and the linear guide groove.

In this embodiment, the locking assembly 30 comprises a first locking member 31, a second locking member 32 and an adjusting member 33, the first locking member 31 comprises an outer sleeve 311, an inner thread is arranged in the outer sleeve 311, the second locking member 32 comprises a tooth block 321, and the tooth block 321 is matched with the inner thread of the outer sleeve 311. One end of the outer sleeve 311 is fixed on one side of the mounting part 111 far away from the first clamp body 12, the connecting rod 20 is arranged in the outer sleeve 311 in a penetrating mode, and the outer sleeve 311 is used as an axial guide of the connecting rod 20 and has a locking effect.

Referring to fig. 2 and 3, the connecting rod 20 is provided with a mounting groove 21 at a portion of the outer sleeve 311, the mounting groove 21 radially penetrates through the connecting rod 20, the two tooth blocks 321 are symmetrically mounted in the mounting groove 21, the tooth surfaces of the tooth blocks 321 are arranged outward, the inner side surface of the tooth block 321, which faces away from the tooth surfaces, is provided with two spaced connecting portions 322, and the two connecting portions 322 are provided with aligned mounting holes; the two tooth blocks 321 are symmetrically arranged, the connecting parts 322 of the two tooth blocks 321 are mutually crossed, the mounting holes on the two tooth blocks 321 are mutually aligned, and the two tooth blocks 321 mutually limit the axial degree of freedom. The width of the mounting groove 21 is slightly larger than the axial length of the tooth block 321, and the mounting groove 21 is also used for limiting the axial degree of freedom of the tooth block 321, so that the telescopic stability of the tooth block 321 is improved.

In other embodiments, the tooth block 321 has three or more blocks, and the plurality of tooth blocks 321 are uniformly arranged along a circumference. The connecting portions 322 of the plurality of tooth blocks 321 are staggered with each other.

Referring to fig. 4, in the present embodiment, the adjusting member 33 includes a rotating shaft 331, an eccentric wheel 332, and a toggle member 333. The connecting rod 20 is provided therein with a mounting hole 22, the mounting hole 22 communicates with the mounting groove 21, the rotating shaft 331 is rotatably mounted in the mounting hole 22 of the connecting rod 20, and one end of the rotating shaft 331 extends into the mounting groove 21.

Referring to fig. 5, the eccentric 332 has four, four eccentric 332 eccentrically mounted on the rotating shaft 331, and the eccentric 332 is located in the mounting groove 21, the eccentric 332 forming a cam-like structure. The four eccentrics 332 are divided into two groups, and for convenience of description, the four eccentrics 332 in parallel are defined as a, b, c and d, wherein a and c are one group of two eccentrics 332, b and d are one group of two eccentrics 332, a and c are two eccentrics 332 with respect to the rotating shaft 331 and are + Δ L eccentric on the straight line L, and b and d are two eccentrics 332 with respect to the rotating shaft 331 and are- Δ L eccentric on the straight line L. The two eccentrics 332 of a and c are respectively installed in the installation holes of the connecting portion 322 of one block 321, and the two eccentrics 332 of b and d are respectively installed in the installation holes of the connecting portion 322 of the other block 321. The mounting holes of the two tooth blocks 321 are in a square structure, the width of the mounting hole of the tooth block 321 is equal to the outer diameter R of the eccentric wheel 332, and the length of the mounting hole of the tooth block 321 is equal to R +2 DeltaL. Therefore, when the eccentric wheel 332 is driven by the rotating shaft 331 to rotate by 90 °, the height of the tooth block 321 relative to the rotating shaft 331 changes by Δ L. In this embodiment, Δ L is set to be slightly larger than the tooth height of the tooth block 321, so that the tooth block 321 can be completely separated from the outer sleeve 311, and further, the rotation shaft 331 rotates by 90 ° to realize the meshing connection and separation of the tooth block 321 and the outer sleeve 311.

In other embodiments, when Δ L is much larger than the tooth height of the tooth block 321, the rotation of the rotating shaft 331 by 10 °, 20 ° or 60 ° can achieve the switching of the engagement and disengagement of the tooth block 321 and the outer sleeve 311. The specific rotating angle can be set according to actual requirements.

In this embodiment, the toggle member 333 is an annular wheel with a radial protrusion thereon, which is convenient for the doctor to operate. The toggle member 333 is mounted on the connecting rod 20, the connecting rod 20 is provided with a slot 23, the slot 23 is arranged along the circumferential direction, the opening angle of the slot 23 is 90 degrees, the extension part of the toggle member 333 passes through the slot 23 to be connected with the rotating shaft 331, or the toggle member 333 passes through the slot 23 by a screw to be connected with the rotating shaft 331. The toggle member 333 is used for driving the rotation of the rotation shaft 331.

The outer diameter of the toggle member 333 is larger than the maximum radial length of the eccentric 332, and the maximum radial length of the eccentric 332 is 1/2R + Δ L, so that the toggle member 333 and the eccentric 332 form a lever structure, and a smaller force is applied to the toggle member 333 to drive the eccentric 332 to rotate.

In other embodiments, the toggle member 333 is also a rod-shaped structure, one end of the rod-shaped structure passes through the slot 23 and is connected to the rotating shaft 331, and the other end of the rod-shaped structure is exposed outside the slot 23, and can also function as a driving eccentric 332.

In this embodiment, the adjusting member 33 further includes a torsion spring 334, the torsion spring 334 is installed in the installation hole 22 of the connection rod 20, the torsion spring 334 is sleeved on the rotation shaft 331, the torsion spring 334 is connected to the connection rod 20, and the torsion spring 334 is used for providing a restoring force for the rotation shaft 331 to rotate and return.

In other embodiments, the adjusting member 33 does not provide torque, and the return of the rotating shaft 331 can be realized by rotating the toggle member 333.

In this embodiment, a holding handle 24 is installed at one end of the connecting rod 20 away from the second clamp 13, the holding handle 24 is made of wood or plastic material to improve the holding feeling, and the holding handle 24 may also be an integrated structure with the connecting rod 20. The grip 24 is provided with an anti-slip thread on the outer surface thereof, and the grip 24 is used for driving the connecting rod 20 and the locking assembly 30 except the sleeve 311 to rotate simultaneously.

In this embodiment, the use method of the clamping device is described by taking clamping of the injector as an example, and the clamping steps are as follows:

s11: the doctor clamps the mounting seat 11 by a single finger, and rotates the toggle part 333 by 90 degrees through the thumb; the toggle part 333 drives the gear block 321 to retract through the rotating shaft 331 and the eccentric wheel 332, and at this time, the gear block 321 is separated from the outer sleeve 311 and is in an unlocked state, please refer to fig. 6;

s12: placing the injector between the first clamp body 12 and the second clamp body 13, and pushing the second clamp body 13, the connecting rod 20 and the locking assembly 30 to move towards the first clamp body 12 together by a thumb or a palm, so that the first clamp body 12 and the second clamp body 13 form initial clamping on the injector; in this process, the thumb or palm always presses the toggle member 333.

S13: the toggle member 333 is released, the rotating shaft 331 and the eccentric wheel 332 rotate reversely by 90 degrees to reset under the driving of the torsion spring 334, and then the eccentric wheel 332 drives the tooth block 321 to extend out and reset, and the tooth block 321 is meshed and connected with the internal thread of the outer sleeve 311 to form a locking state, please refer to fig. 2;

s14: the holding handle 24 is rotated by fingers, so that the tooth block 321 rotates relative to the outer sleeve 311, the threaded connection of the tooth block 321 and the outer sleeve 311 converts the rotation into the axial linear movement, finally the second clamp body 13 is driven to abut against the syringe, and the first clamp body 12 and the second clamp body 13 clamp the syringe. The clamping state is called a pre-tightening state, in which the gear block 321 is subjected to a reverse clamping force, and under the action force, the driving force of the rotating toggle member 333 cannot drive the gear block 321 to move, and the clamping state can avoid that the syringe is loosened due to mistaken touch of the toggle member 333.

If the syringe needs to be released, the grip handle 24 must be rotated reversely to make the second clip body 13 away from the first clip body 12, the syringe is partially released, the toggle member 333 is rotated to separate the tooth block 321 from the outer sleeve 311 to form an unlocked state, and finally the grip handle 24 is moved axially to move the second clip body 13 a large distance, and the syringe can be taken out.

In the clamping device in this embodiment, since the locking assembly 30 with the adjusting member 33 is connected to the clamping body 10, the adjusting member 33 can drive the locking assembly 30 to lock and unlock the second clamping body 13, the second clamping body 13 cannot directly axially move in the locked state, and can directly axially move in the unlocked state by rotating; make the doctor use clamping device to carry out the clamping or when dismantling devices such as syringe pump, only need grip clamping device through one's body to just can realize the locking and the unblock of second clamp 13 through pointing the operation regulating part, thereby this clamping device uses conveniently, labour saving and time saving.

In one embodiment, a clamping device is provided which differs from the above embodiments in that the locking assembly is different, and which is also capable of single-body operation.

Referring to fig. 7 to 10, in the present embodiment, the clamping body 10 includes an installation base 11, a first clamping body 12 and a second clamping body 13, the first clamping body 12 is a fixed clamping body, the second clamping body 13 is a movable clamping body, the first clamping body 12 and the installation base 11 are integrated, and the first clamping body 12 can also be fixed on the installation base 11 by welding or screw fixation. The second clamp body 13 is movably arranged on the mounting seat 11, the second clamp body 13 can move relative to the first clamp body 12, and then the medical device can be clamped by the cooperation of the first clamp body 12 and the second clamp body 13.

The locking assembly 40 comprises a first locking member 41, a second locking member 42 and an adjusting member 43, wherein the first locking member 41 comprises an outer sleeve 411, an inner tooth is arranged in the outer sleeve 411, the inner tooth is a one-way tooth, and the one-way tooth is formed by a plurality of annular teeth side by side and is in a non-spiral structure.

The second locking member 42 includes a rotary joint member 421, the rotary joint member 421 is a strip structure, and the rotary joint member 421 has two pieces.

The end of the connecting rod 20 far away from the second clamp body 13 is provided with an external thread. The adjusting member 43 comprises a sleeve shaft 431, a pressing cylinder 432 and a restoring member 433, wherein the sleeve shaft 431 is provided with an internal thread, the sleeve shaft 431 is sleeved on the connecting rod 20, the sleeve shaft 431 is in threaded connection with the connecting rod 20, and the sleeve shaft 431 is simultaneously positioned in the outer sleeve 411. The sleeve shaft 431 is provided with two symmetrical mounting grooves, and a rotary clamping piece 421 and a return piece 433 are mounted in each mounting groove. Specifically, the end of the rotary clamping piece 421 close to the second clamping body 13 is rotatably connected with the sleeve shaft 431, the end of the rotary clamping piece 421 far away from the second clamping body 13 is a free end, the restoring piece 433 is a spring plate, the spring plate is connected with the inner surface of the free end of the rotary clamping piece 421, and the spring plate always provides the driving force for outwards popping out the free end of the rotary clamping piece 421. The elastic sheet of the restoring member 433 can be set to be two, or one elastic structure has two elastic parts respectively connected with the two rotating clamping members 421, and the restoring member 433 is also a straight spring and can also provide driving force for the rotating clamping members 421.

Under the action of the restoring member 433, the free end of the rotating catch member 421 is ejected out of the one-way teeth of the rotating catch member 421. The rotating clamp member 421 and the outer sleeve 411 form a ratchet structure, and the rotating clamp member 421 can move freely towards the direction close to the second clamp body 13 relative to the outer sleeve 411 but cannot move freely towards the direction far away from the second clamp body 13.

The pressing cylinder 432 is a cylindrical structure, the pressing cylinder 432 is installed on the connecting rod 20, and the pressing cylinder 432 is located between the second clamp body 13 and the sleeve shaft 431. The connecting rod 20 is provided with a shaft shoulder, one end of the pressing cylinder 432, which is far away from the sleeve shaft 431, abuts against the shaft shoulder of the connecting rod 20, and the shaft shoulder is used for limiting the pressing cylinder 432. One side of pressing a section of thick bamboo 432 towards sleeve shaft 431 is equipped with the annular chamber that holds, and the external diameter of sleeve shaft 431 towards the one end of pressing a section of thick bamboo 432 is less than the internal diameter that holds the chamber of pressing a section of thick bamboo 432, and this tip of sleeve shaft 431 can move to the intracavity that holds of pressing a section of thick bamboo 432, and then the outer wall in the chamber that holds of sleeve shaft 431 can be with rotating joint spare 421 impressing in the mounting groove of sleeve shaft 431.

In this embodiment, the adjusting member 43 further includes a spring 434, the spring 434 is installed in the accommodating cavity of the pressing cylinder 432, two ends of the spring 434 are respectively connected with the pressing cylinder 432 and the sleeve shaft 431, the spring 434 is always in a compressed state, and the spring 434 is used for providing a pre-tightening force for the threaded connection of the sleeve shaft 431 and providing an axial acting force for the pressing cylinder 432, so that the pressing cylinder 432 can be stably located at the axial position of the connecting rod 20.

Be equipped with the guide slot on pressing a section of thick bamboo 432, be equipped with bellied stopper on the sleeve 431, the stopper joint is in the guide slot, and guide slot and stopper are used for the guide effect, improve sleeve 431 axial displacement's stability.

In this embodiment, the connecting rod 20 can be driven to rotate relative to the sleeve 431 by rotating the handle 24, so as to drive the pressing cylinder 432 to move relative to the sleeve 431. When the holding handle 24 rotates counterclockwise, the connecting rod 20 rotates relative to the sleeve shaft 431, the pressing cylinder 432 moves close to the sleeve shaft 431, and the pressing cylinder 432 can press down the rotating clamping piece 421 to separate the rotating clamping piece 421 from the outer sleeve 411; when the holding handle 24 rotates clockwise, the connecting rod 20 rotates relative to the sleeve shaft 431, the pressing cylinder 432 moves away from the sleeve shaft 431, the pressing cylinder 432 leaves the rotating clamping piece 421, and the rotating clamping piece 421 pops out to be meshed with the outer sleeve 411 under the action of the spring 434; when the holding handle 24 continues to rotate clockwise, the second clamp body 13 moves close to the first clamp body 12, and clamping of the device is achieved.

s21: the doctor holds the grip 24 with one hand and rotates the grip 24 counterclockwise by fingers; the connecting rod 20 rotates relative to the sleeve shaft 431, the pressing cylinder 432 moves close to the sleeve shaft 431, and the pressing cylinder 432 can press down the rotating clamping piece 421 to separate the rotating clamping piece 421 from the outer sleeve 411 to be in an unlocking state, please refer to fig. 9;

s12: the injector is placed between the first clamp body 12 and the second clamp body 13, and then the second clamp body 13, the connecting rod 20 and the locking assembly 40 are pushed by a thumb or a palm to move towards the first clamp body 12 together, so that the first clamp body 12 and the second clamp body 13 form initial clamping on the injector.

S13: by rotating the holding handle 24 clockwise with fingers, the connecting rod 20 rotates relative to the sleeve shaft 431, the pressing cylinder 432 moves away from the sleeve shaft 431, the pressing cylinder 432 leaves the rotating clamping piece 421, and under the action of the spring 434, the rotating clamping piece 421 is ejected out to be meshed with the outer sleeve 411 to form a locking state, please refer to fig. 8;

s14: by further rotating the holding handle 24 clockwise with the fingers, the connecting rod 20 rotates relative to the sleeve shaft 431, the connecting rod 20 drives the second clamp 13 to move towards the first clamp 12, so that the second clamp 13 is driven to abut against the injector, and the injector is clamped by the first clamp 12 and the second clamp 13, which is a clamping state.

If the syringe needs to be released, the holding handle 24 is rotated counterclockwise first to make the second clamp 13 far away from the first clamp 12, the syringe is partially released and rotated until the rotating clamp 421 is separated from the outer sleeve 411 to form an unlocked state, and finally the holding handle 24 is moved axially to move the second clamp 13 a large distance away, at this time, the syringe can be taken out.

The clamping device of the embodiment is of a one-way ratchet structure, and the second clamp body 13 can rapidly move towards the first clamp body 12 under the unlocking condition and the locking state, so that the operation of a doctor is facilitated; in the unlocked state, the rotary clamping piece 421 is separated from the outer sleeve 411, so that the second clamp body 13 can reversely and rapidly slide. Make this clamping device simple operation, labour saving and time saving.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. A clamping device is characterized by comprising

2. The clamping device as claimed in claim 1, wherein said first retaining member includes an outer sleeve having internal threads, said connecting rod being disposed through said outer sleeve; the second retaining member includes the tooth piece, be equipped with radial mounting groove on the connecting rod, but tooth piece radial movement installs in the mounting groove of connecting rod, the regulating part is used for rotating preset angle drive the tooth piece along mounting groove radial movement with the internal thread engagement of outer sleeve is connected or is separated.

3. The clamping device as claimed in claim 2, wherein said tooth blocks have at least two blocks uniformly distributed along a same circumferential direction, and said adjusting member is connected to all of said tooth blocks, said adjusting member being adapted to adjust the simultaneous movement of all of said tooth blocks.

4. The clamping device as claimed in claim 3, wherein the adjusting member comprises a rotating shaft, an eccentric wheel and a toggle member, the connecting rod is provided with a mounting hole communicated with the mounting groove, the rotating shaft is rotatably arranged in the mounting hole of the connecting rod, the rotating shaft is arranged in the mounting groove in a penetrating manner, the eccentric wheel is arranged on the part of the rotating shaft, which is positioned in the mounting groove, the toothed block is provided with a mounting hole, and the eccentric wheel is clamped in the mounting hole of the toothed block; the connecting rod is further provided with an opening communicated with the mounting hole, the poking piece is installed on the connecting rod, a slotted hole is formed in the connecting piece and communicated with the mounting hole, the poking piece is connected with the rotating shaft through the slotted hole, the slotted hole is provided with a rotating interval of the poking piece, and the poking piece drives the tooth block to move along the radial direction of the mounting groove through the rotating shaft and the eccentric wheel.

5. The clamping device as claimed in claim 4, wherein the adjusting member further comprises a torsion spring, the torsion spring is sleeved on the rotating shaft and is further connected with the connecting rod, and the torsion spring is used for driving the rotating shaft, the eccentric wheel, the shifting member and the toothed block to reset.

6. The clamping device as recited in claim 4, wherein a radial length of said toggle member is greater than a maximum radial length of said eccentric.

7. The clamping device as claimed in claim 4, wherein the gear block is provided with two connecting portions spaced from each other on a surface facing the rotating shaft, each connecting portion is provided with a mounting hole, and the mounting hole of each connecting portion is internally provided with one eccentric wheel; the connecting parts of the plurality of tooth blocks are connected on the rotating shaft in a staggered manner.

8. The clamping device as claimed in claim 4, wherein the axial width of the mounting groove is adapted to the axial width of the tooth block, the mounting groove being adapted to limit the axial degree of freedom of the tooth block.

9. The clamping device as claimed in claim 1, wherein said first retaining member is an outer sleeve having internal teeth, said connecting rod being disposed through said outer sleeve; the second retaining member is a rotary joint piece, and the rotary joint piece is used for being connected with or separated from the inner teeth of the outer sleeve.

10. The clamping device as claimed in claim 9, wherein the internal teeth of the outer sleeve are unidirectional teeth.

11. The clamping device as claimed in claim 9, wherein the adjusting member comprises a sleeve shaft, a pressing cylinder and a restoring member, the connecting rod is provided with a shaft shoulder and an external thread, the pressing cylinder and the sleeve shaft are sleeved on the connecting rod, one end of the pressing cylinder abuts against the shaft shoulder, one end of the pressing cylinder, which is far away from the connecting rod, is provided with a containing cavity, the sleeve shaft is provided with an internal thread, the internal thread of the sleeve shaft is meshed with the external thread of the connecting rod, and one end of the sleeve shaft can move into the containing cavity of the pressing cylinder; the sleeve shaft is provided with a mounting groove, the rotary clamping piece is mounted in the mounting groove of the sleeve shaft, one end of the rotary clamping piece is rotatably connected with the sleeve shaft, the other end of the rotary clamping piece is a free end, the restoring piece is arranged on the sleeve shaft, and the restoring piece is connected with the free end of the rotary clamping piece; the restoring piece is used for driving the free end of the rotating clamping piece to pop up and be connected with the one-way teeth of the outer sleeve, and the pressing cylinder is used for pressing the rotating clamping piece back so as to enable the free end of the rotating clamping piece to be separated from the one-way teeth of the outer sleeve.

12. The clamping device as claimed in claim 11, wherein said restoring member is a leaf spring or a spring.

13. The clamping device as claimed in claim 11, wherein said adjustment member further comprises a spring disposed between said pressure tube and said sleeve shaft.

14. The clamping device as claimed in any one of claims 1 to 13, wherein a grip is mounted to an end of the connecting rod remote from the mounting socket.

15. The clamping device as claimed in claim 14, wherein said second clamp body is pivotally connected to an end of said connecting rod and has a clearance axially adjustable relative to said connecting rod.

16. The clamping device as claimed in claim 14, wherein said mounting seat and said second clamp body are respectively provided with a linear guide groove and a linear projection, said linear projection being slidably coupled in said linear guide groove; the connecting rod is rotatably connected with the second clamp body.

17. The clamping device as recited in claim 14, wherein said first clamp body and said mounting base are of a unitary construction.