WO2021197197A1

WO2021197197A1 - Medical pressurization control device convenient to control

Info

Publication number: WO2021197197A1
Application number: PCT/CN2021/082972
Authority: WO
Inventors: 金鸿雁; 仇卫勤; 李常青
Original assignee: 南微医学科技股份有限公司
Priority date: 2020-04-02
Filing date: 2021-03-25
Publication date: 2021-10-07
Also published as: CN212880577U

Abstract

Disclosed is a medical pressurization control device which is convenient to control. The control device comprises an outer tube and a threaded push rod located in the outer tube. A lever control member and an elastic locking control mechanism are arranged on the outer tube, the lever control member is connected to a movable block, and the elastic locking control mechanism cooperates, under the control of the lever control member, with the movable block for use, such that the threaded push rod is locked and unlocked; and the elastic locking control mechanism comprises a locking nut piece and an elastic member for controlling an initial position of the locking nut piece.

Description

Conveniently controlled medical charging and pressure control device

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on April 2, 2020, the application number is 202020470719.2, and the utility model name is "a convenient control medical charging control device", the entire content of which is incorporated by reference In this application.

Technical field

This application relates to the field of medical equipment, in particular to a medical charging control device that is convenient to control.

Background technique

The medical balloon pressure pump is suitable for balloon dilatation catheters to inflate and contract the balloon, and is used for dilatation operations on narrowed human lumen. During expansion, a balloon pressure pump needs to be used to inject fluid, pressurize and monitor the pressure of the balloon. When pumping negative pressure, it is necessary to achieve a single person pumping and locking action very conveniently.

At present, the conventional disposable medical balloon pressure pumps in clinical practice are basically screw-propelled, but the structure of the engagement and unlocking of the screw and the nut is different. The typical engagement and unlocking structures are: eccentric, lever, and oblique wedge Wait. Due to the different design structures, there are also different problems. All structures need to use human fingers to achieve thread engagement and unlocking functions: eccentric structure requires a second person to reach out to help to successfully complete the negative pressure operation; lever type The locking function of the structure under negative pressure is at risk of failure (that is, it cannot stably form a negative pressure state); the oblique wedge structure requires the thumb and index finger to act as a negative pressure operation at the same time when pumping negative pressure, although this structure can be completed in one go The actions of releasing, pumping air, and locking, but due to the structural arrangement, the capacity is relatively small, which cannot meet the market's demand for large capacity.

Summary of the invention

The technical problem to be solved by this application is to provide a medical charging control device that is convenient to control in response to the shortcomings of the prior art.

The application discloses a convenient control medical charging control device, which includes an outer tube and a threaded push rod located in the outer tube. The outer tube is provided with a lever control member and a lock control mechanism. The lock control mechanism is under the control of the lever control member. Realize the locking and unlocking of the threaded push rod;

The lock control mechanism includes a movable block, a lock nut piece and an elastic member that controls the lock nut piece to be in an unlocked position or a locked position.

In some embodiments, the movable block includes two pliers arms, the elastic member controls the locking nut piece to be in an unlocked position, and the pliers arm cooperates with the elastic member to complete the locking and unlocking of the threaded push rod by the locking nut piece.

In some embodiments, the lock nut piece includes a first lock nut piece and a second lock nut piece, and one end of the first lock nut piece and the second lock nut piece away from the movable block is connected to the outer tube through a pin; The elastic member is a compression spring, and the elastic member is arranged on the inner side of one end of the first locking nut piece and the second locking nut piece close to the movable block.

In some embodiments, the lock nut piece includes a first lock nut piece and a second lock nut piece, and one end of the first lock nut piece and the second lock nut piece away from the movable block is connected to the outer tube through a pin; The elastic member is a torsion spring, which is arranged at the pin shaft. The torsion spring applies the torsion force of the first lock nut piece and the second lock nut piece to make the first lock nut piece and the second lock nut piece close to the movable block One end is offset radially outward.

In some embodiments, the lock nut piece includes a first lock nut piece and a second lock nut piece. One end of the first lock nut piece and the second lock nut piece away from the movable block is respectively connected to the outer tube by a pin. The elastic member is a first tension spring and a second tension spring, which are respectively arranged on the outside of the first locking nut piece and the second locking nut piece, and the other ends of the first tension spring and the second tension spring are respectively fixed inside the outer tube.

In some embodiments, the ends of the first lock nut piece and the second lock nut piece away from the movable block are respectively connected to the outer tube through different pin shafts.

In some embodiments, the outer sides of the first lock nut piece and the second lock nut piece are arc surfaces, and the contact position between the clamp arm and the arc surface is changed to complete the locking of the lock nut piece on the threaded push rod. Tighten and unlock.

In some embodiments, the movable block includes a protrusion with a wide front and a narrow rear. The elastic member controls the locking nut piece to be in a locked position, and the protrusion cooperates with the elastic member to complete the unlocking and locking of the threaded push rod by the locking nut piece.

In some embodiments, the lock nut piece includes a first lock nut piece and a second lock nut piece, and one end of the first lock nut piece and the second lock nut piece away from the protrusion is respectively connected to the outer tube by a pin. , The convex block is located in the first lock nut piece and the second lock nut piece; the elastic members are the second compression spring and the third compression spring, which are respectively arranged outside the first lock nut piece and the second lock nut piece, The other ends of the second compression spring and the third compression spring are respectively fixed inside the outer tube.

In some embodiments, the lock nut piece includes a first lock nut piece and a second lock nut piece, and one end of the first lock nut piece and the second lock nut piece away from the protrusion is respectively connected to the outer tube by a pin. , The convex block is located in the first lock nut piece and the second lock nut piece; the elastic member is a tension spring, and is arranged on the inner side of one end of the first lock nut piece and the second lock nut piece close to the movable block.

In some embodiments, the lock nut piece includes a first lock nut piece and a second lock nut piece, and one end of the first lock nut piece and the second lock nut piece away from the protrusion is respectively connected to the outer tube by a pin. , The convex block is located in the first lock nut piece and the second lock nut piece; the elastic member is a torsion spring, the torsion spring is arranged at the pin shaft, and the torsion spring applies the twist of the first lock nut piece and the second lock nut piece The force causes the first lock nut piece and the second lock nut piece to be radially inwardly biased at one end close to the convex block.

In some embodiments, the inner sides of the first lock nut piece and the second lock nut piece are provided with an arc surface, and the contact position between the protrusion and the arc surface is changed to complete the lock nut piece on the threaded push rod. Lock and unlock.

The device provided in the present application uses the principle of leverage to realize the single-finger release of the lock nut to realize the negative pressure operation. The structure is convenient and fast, and the pressure holding performance after locking is stable and reliable. The specific structure of the movable block and the locking nut plate can be effectively separated and locked under the action of the lever.

Description of the drawings

Figure 1 is an exploded view of embodiment 1;

2 is a schematic diagram of the structure of Embodiment 1;

Figure 3 is a sectional view of the locked state of the medical charging control device;

Figure 4 is an unlocked cross-sectional view of the medical charging control device;

Figure 5 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 1;

Figure 6 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 2;

Figure 7 is a schematic diagram of the installation of the lever control member and the locking member in the third embodiment;

Figure 8 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 4;

Figure 9 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 5;

10 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 6;

Figure 11 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 7;

Figure 12 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 8;

Figure 13 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 9;

14 is a schematic diagram of the installation of the lever control member and the locking member in Embodiment 10;

Figure 15 is a schematic diagram of the installation of the lever control member and the locking member in the eleventh embodiment.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to FIGS. 1-8.

The present invention discloses a convenient control medical charging control device, comprising an outer tube 14 and a threaded push rod 1 located in the outer tube. It is characterized in that the outer tube 14 is provided with a lever control member and a lock control mechanism. Realize the locking and unlocking of the threaded push rod 1 under the control of the lever control part;

The movable block includes two pliers arms, the elastic member controls the locking nut piece to be in the unlocking position, and the pliers arm cooperates with the elastic member to complete the locking and unlocking of the threaded push rod 1 by the locking nut piece.

The lock nut piece includes a first lock nut piece and a second lock nut piece. One end of the first lock nut piece and the second lock nut piece away from the movable block is connected to the outer tube through a pin shaft; the elastic member is a compression spring, The elastic member is arranged on the inner side of one end of the first locking nut piece and the second locking nut piece close to the movable block.

The lock nut piece includes a first lock nut piece and a second lock nut piece. One end of the first lock nut piece and the second lock nut piece away from the movable block is connected to the outer tube through a pin shaft; the elastic member is a torsion spring, The torsion spring is arranged at the pin shaft, and the torsion spring applies the torsion force of the first lock nut piece and the second lock nut piece to make the first lock nut piece and the second lock nut piece close to the movable block radially outward Bias.

The lock nut piece includes a first lock nut piece and a second lock nut piece. The ends of the first lock nut piece and the second lock nut piece away from the movable block are respectively connected to the outer tube by a pin shaft; the elastic member is the first The tension spring and the second tension spring are respectively arranged on the outer side of the first locking nut piece and the second locking nut piece, and the other ends of the first tension spring and the second tension spring are respectively fixed on the inner side of the outer tube.

The movable block includes a convex block that is wide in the front and narrow in the rear. The elastic element controls the locking nut piece to be in the locked position. The convex piece cooperates with the elastic piece to complete the unlocking and locking of the threaded push rod 1 by the locking nut piece.

The lock nut piece includes a first lock nut piece and a second lock nut piece. One end of the first lock nut piece and the second lock nut piece away from the protrusion is connected to the outer tube through a pin shaft, and the protrusion is located at the first Inside the lock nut piece and the second lock nut piece; the elastic members are the second compression spring and the third compression spring, which are respectively arranged on the outside of the first lock nut piece and the second lock nut piece, the second compression spring and the second compression spring The other ends of the three compression springs are respectively fixed inside the outer tube.

The lock nut piece includes a first lock nut piece and a second lock nut piece. One end of the first lock nut piece and the second lock nut piece away from the protrusion is connected to the outer tube through a pin shaft, and the protrusion is located at the first Inside the lock nut piece and the second lock nut piece; the elastic member is a tension spring, which is arranged on the inner side of one end of the first lock nut piece and the second lock nut piece close to the movable block.

The lock nut piece includes a first lock nut piece and a second lock nut piece. One end of the first lock nut piece and the second lock nut piece away from the protrusion is connected to the outer tube through a pin shaft, and the protrusion is located at the first In the lock nut piece and the second lock nut piece; the elastic member is a torsion spring, the torsion spring is arranged at the pin shaft, and the torsion spring exerts the torsion force of the first lock nut piece and the second lock nut piece to make the first lock One end of the tightening nut piece and the second locking nut piece close to the convex block is radially inwardly offset.

Example 1:

As shown in Figure 1, this embodiment provides a convenient control medical charging control device, including a threaded push rod 1, a first lock nut piece 2, a pin shaft 3, a second lock nut piece 4, a fixing seat 5, Movable block 6, head pin 7, lever 8, middle pin 9, torsion spring 10, piston seat 11, O-ring 12, piston cap 13, transparent outer tube 14, pressure gauge 15, joint 16 and network tube 17; Use the pin 3 to connect the first lock nut piece 2 and the second lock nut piece 4; use the head pin 7 to connect the movable block 6 and the lever 8; use the middle pin 9 to connect the torsion spring 10 and the lever 8 ; Finally, the shaft pin 3 connecting parts are installed in the fixing seat 5 and then the threaded push rod 1, the fixing seat 5, the piston seat 11, the O-ring 12, and the piston cap 13 are firmly connected in order and then installed into the transparent outer tube 14; Put the connecting parts of the pin 7 and the pin 9 into the fixing seat 5 and the transparent outer tube 14 in sequence; finally, glue the pressure gauge 15 to the transparent outer tube 14, and then glue the joint 16, and the network tube 17 together. After the transparent outer tube 14 is reached, the assembly of the disposable medical balloon pressure pump is completed.

The lever control member includes a movable block 6 connected with the lever control member, a head pin 7, a lever 8, a middle pin 9 and a torsion spring 10. The movable block has a concave structure, and the movable block includes a first clamp arm and a second clamp Arm, the locking member includes a first lock nut piece and a second lock nut piece, the first clamp arm and the second clamp arm are respectively located outside the first lock nut piece and the second lock nut piece, the first lock Both the inner side of the tightening nut piece and the second locking nut piece are provided with internal threads adapted to the threaded push rod 1. One end of the first locking nut piece and the second locking piece close to the movable block is connected by a first compression spring, and the other end They are connected together by a pin.

When this embodiment is in use, in the initial position, the first lock nut piece 2 and the second lock nut piece 4 are in a locked state due to the action of the torsion spring 10, and the threaded push rod 1 is restricted in this state. Rotating the threaded push rod 1 can pressurize the filled balloon to realize the corresponding expansion operation.

If you need to perform quick liquid injection, liquid withdrawal or negative pressure operations, you only need to use the little finger and ring finger of your left hand to press the lever 8 to overcome the torsion force of the torsion spring 10 and drive the movable block 6 to move outward, so that the first lock nut piece and The second lock nut piece is opened, and the first thread 2a and the second thread 4a are changed from the engaged state to the unlocked state with the threaded push rod 1, and the restraint on the threaded push rod 1 is released; it should be noted that after the negative pressure operation It is necessary to loosen the fingers for releasing pressure so that the lock nut piece and the threaded lever 1 are automatically engaged under the action of the compression spring 18 to achieve the pressure maintaining effect, which can be operated with one hand.

In this embodiment, the constraints of the first lock nut piece and the second lock nut piece are released here to perform liquid injection, liquid extraction or negative pressure operations, and finally the entire pressure maintaining action is done at one go, and the operation is simple.

The invention reasonably utilizes the principle of lever, takes the pin on the transparent tube as the fulcrum, the torsion spring is shaped, and the automatic restoring force of the compression spring can effectively engage and disengage the threaded push rod and the two lock nut pieces under the action of the lever. .

The first lock nut piece 2, the first thread 2 a, the second thread 4 a on the second lock nut piece 4 and the special thread structure on the threaded push rod 1 are matched. The outer arc surface of the first lock nut piece 2 and the second lock nut piece 4 is the key to ensure the effective locking of the threads. With this structure, the pressure pump can ensure that the threads are not effectively locked during the corresponding operation, especially the pressure maintaining operation. Invalidate.

Example 2:

As shown in Fig. 6, the difference between this embodiment and the first embodiment is that the lever control member includes a movable block connected with the lever control member. The movable block has a concave structure. The movable block 6 includes a first movable side 6a and a second movable side 6b. The locking piece includes a first lock nut piece 2 and a second lock nut piece 4. The inner side of the first lock nut piece and the second lock nut piece are both provided with internal threads adapted to the threaded push rod 1. One end of the lock nut piece and the second lock nut piece close to the movable block is connected by a compression spring 18, and the other end is respectively connected by a pin shaft. In this embodiment, the first lock nut piece and the second lock nut piece are respectively connected by a pin The

shafts

19b and 19c are fixed on the fixing base 5.

Example 3:

As shown in Fig. 7, the difference between this embodiment and embodiment 1 is that the lever control member includes a movable block connected with the lever control member, the movable block includes a convex block 22 with a wide front and a narrow rear, and the locking member includes a first lock nut plate 2 And the second lock nut piece 4, the protrusions are located in the first lock nut piece and the second lock nut piece, and the outer sides of the first lock nut piece and the second lock nut piece are respectively connected to the second compression spring 20a and the first The other ends of the three compression springs 20b, the second compression spring and the third compression spring are respectively fixed inside the outer tube, and the ends of the first lock nut piece and the second lock nut piece are connected by

pins

19b and 19c, respectively.

Example 4:

As shown in Figure 8, the difference between this embodiment and Embodiment 1 is that the lever control member includes a movable block connected with the lever control member, the movable block includes a convex block 22 with a front width and a narrow rear, and the locking member includes a first lock nut plate 2 And the second lock nut piece 4, the protrusions are located in the first lock nut piece and the second lock nut piece, and the outer sides of the first lock nut piece and the second lock nut piece are respectively connected to the second compression spring 20a and the first The other ends of the three compression springs 20b, the second compression spring and the third compression spring are respectively fixed inside the outer tube, and the ends of the first lock nut piece and the second lock nut piece are connected together by a pin shaft 19a.

Example 5:

As shown in Figure 9, the difference between this embodiment and the first embodiment is that the lever control member includes a movable block connected with the lever control member. The movable block has a concave structure. The movable block includes a first movable side and a second movable side. The locking member It includes a first lock nut piece and a second lock nut piece. Both the inner side of the first lock nut piece and the second lock nut piece are provided with internal threads adapted to the threaded push rod 1. The first lock nut piece and The ends of the second lock nut piece are respectively connected by the first torsion spring 21b and the second torsion spring 21c.

Example 6:

As shown in Figure 10, the difference between this embodiment and the first embodiment is that the lever control member includes a movable block connected with the lever control member. The movable block has a concave structure. The movable block 6 includes a first movable side 6a and a second movable side 6b. The locking piece includes a first lock nut piece and a second lock nut piece. The inner side of the first lock nut piece and the second lock nut piece are both provided with internal threads adapted to the threaded push rod 1. The end of the nut piece and the second locking nut piece are connected together by a torsion spring 21a.

Example 7:

As shown in Figure 11, the difference between this embodiment and the first embodiment is that the lever control member includes a movable block connected with the lever control member. The movable block has a concave structure. The movable block 6 includes a first movable side 6a and a second movable side 6b. The locking piece includes a first lock nut piece and a second lock nut piece. The inner side of the first lock nut piece and the second lock nut piece are both provided with internal threads adapted to the threaded push rod 1. The outer sides of the nut piece and the second locking nut piece are respectively connected to the first tension spring and the second tension spring. The other ends of the first tension spring and the second tension spring are respectively fixed inside the outer tube. The first locking nut piece and the second lock The ends of the nut pieces are respectively connected by

pins

21b and 21c.

Example 8:

As shown in Figure 12, the difference between this embodiment and Embodiment 1 is that the lever control member includes a movable block connected with the lever control member, the movable block 6 is a concave structure, and the movable block includes a first movable side 6a and a second movable side 6b. The locking piece includes a first lock nut piece 2 and a second lock nut piece 4. The inner side of the first lock nut piece and the second lock nut piece are both provided with internal threads adapted to the threaded push rod 1. The outer sides of the lock nut piece and the second lock nut piece are respectively connected to the first tension spring 20a and the second tension spring 20b. The other ends of the first tension spring and the second tension spring are respectively fixed inside the outer tube, and the first lock nut piece The end of the second lock nut piece is connected together by a pin shaft 21a.

Example 9:

As shown in Figure 13, the difference between this embodiment and Embodiment 1 is that the lever control member includes a movable block connected with the lever control member, the movable block includes a convex block with a front width and a narrow rear, and the locking member includes a first lock nut piece and a first lock nut piece. Two lock nut pieces, the inner side of the first lock nut piece and the second lock nut piece are both provided with internal threads adapted to the threaded push rod 1. The first lock nut piece and the second lock nut piece are close to the movable block One side is connected by a tension spring, the convex block is located in the first lock nut piece, the second lock nut piece and the inside of the area where the tension spring is formed. The ends of the first lock nut piece and the second lock nut piece pass through pins respectively The

shafts

19b and 19c are connected.

Example 10:

As shown in Figure 14, the difference between this embodiment and Embodiment 1 is that the lever control member includes a movable block connected to the lever control member, the movable block includes a convex block 22 with a front width and a narrow rear, and the locking member includes a first lock nut piece and The second lock nut piece, the inner side of the first lock nut piece and the second lock nut piece are provided with internal threads adapted to the threaded push rod 1, the first lock nut piece 2 and the second lock nut piece 4 The side close to the movable block is connected by a tension spring. The convex block 22 is located in the first lock nut piece, the second lock nut piece and the area formed by the tension spring 23. The first lock nut piece and the second lock nut The ends of the pieces are connected together by a pin 19a.

The movable block moves outward and drives the first lock nut piece 2 and the second lock nut piece 4 to expand outward through the protrusion 22, so that the internal threads of the first lock nut piece and the second lock nut piece and the threaded push rod 1 After the threaded push rod 1 is disengaged, after the threaded push rod 1 is moved, the lever control member is released, and the tension of the tension spring 23 causes the first lock nut piece and the second lock nut piece to automatically retract, and then engage and fix again.

Example 11:

As shown in Figure 15, the lock nut piece includes a first lock nut piece and a second lock nut piece. The block is located in the first lock nut piece and the second lock nut piece; the elastic member is a first torsion spring 19a and a second torsion spring 19b, the first torsion spring 19a and the second torsion spring 19b are arranged at the pin shaft, the first A torsion spring 19a and a second torsion spring 19b exert the torsion force of the first lock nut piece and the second lock nut piece, so that the first lock nut piece and the second lock nut piece close to the protrusion end radially inwardly deviate Set. Among them, the first torsion spring 19a and the second torsion spring 19b can be arranged on different pin shafts (as shown in FIG. 15), or on the same pin shaft (not shown in the figure).

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions recorded in the foregoing embodiments are modified, or some of the technical features thereof are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

A convenient control medical charging control device, comprising an outer tube and a threaded push rod located in the outer tube, characterized in that the outer tube is provided with a lever control member and a lock control mechanism, and the lock control mechanism is under the control of the lever control member Realize the locking and unlocking of the threaded push rod;

The lock control mechanism includes a movable block, a lock nut piece and an elastic member that controls the lock nut piece to be in an unlocked position or a locked position.
The medical charging control device for convenient control according to claim 1, wherein the movable block includes two clamp arms, the elastic member controls the lock nut piece to be in the unlocked position, and the clamp arm cooperates with the elastic member to complete the lock nut Locking and unlocking of the threaded push rod by the piece.
The medical charging control device for convenient control according to claim 2, wherein the lock nut piece comprises a first lock nut piece and a second lock nut piece, the first lock nut piece and the second lock nut piece One end of the lock nut piece away from the movable block is connected with the outer tube through a pin shaft; the elastic piece is a compression spring, and the elastic piece is arranged inside one end of the first lock nut piece and the second lock nut piece close to the movable block.
The medical charging control device for convenient control according to claim 2, wherein the lock nut piece comprises a first lock nut piece and a second lock nut piece, the first lock nut piece and the second lock nut piece The end of the lock nut piece away from the movable block is connected to the outer tube through a pin shaft; the elastic member is a torsion spring, which is arranged at the pin shaft, and the torsion spring applies the torsion force of the first lock nut piece and the second lock nut piece to make One end of the first lock nut piece and the second lock nut piece close to the movable block is radially outwardly biased.
The medical charging control device for convenient control according to claim 2, wherein the lock nut piece comprises a first lock nut piece and a second lock nut piece, the first lock nut piece and the second lock nut piece One end of the lock nut piece away from the movable block is connected to the outer tube through a pin shaft; the elastic member is a first tension spring and a second tension spring, which are respectively arranged on the outside of the first lock nut piece and the second lock nut piece. The other ends of the tension spring and the second tension spring are respectively fixed inside the outer tube.
The medical charging control device for convenient control according to any one of claims 3-5, wherein the first lock nut piece and the second lock nut piece pass through different ends away from the movable block. The pin shaft is connected with the outer tube.
The medical charging control device for convenient control according to any one of claims 3-5, wherein the outer sides of the first lock nut piece and the second lock nut piece are arc surfaces, Change the contact position of the clamp arm and the arc surface to complete the locking and unlocking of the threaded push rod by the lock nut piece.
The medical charging control device for convenient control according to claim 1, wherein the movable block includes a protrusion with a wide front and a narrow rear, and the elastic member controls the locking nut piece to be in the locked position, and the protrusion cooperates with the elastic member Complete the unlocking and locking of the threaded push rod by the lock nut piece.
The medical charging control device for convenient control according to claim 8, wherein the lock nut piece comprises a first lock nut piece and a second lock nut piece, the first lock nut piece and the second lock nut piece One end of the lock nut piece away from the convex block is connected to the outer tube through a pin shaft. The convex block is located in the first lock nut piece and the second lock nut piece; the elastic members are the second compression spring and the third compression spring, which are respectively arranged Outside the first lock nut piece and the second lock nut piece, the other ends of the second compression spring and the third compression spring are respectively fixed inside the outer tube.
The medical charging control device for convenient control according to claim 8, wherein the lock nut piece comprises a first lock nut piece and a second lock nut piece, the first lock nut piece and the second lock nut piece One end of the lock nut piece away from the convex block is connected to the outer tube through a pin shaft. The convex block is located in the first lock nut piece and the second lock nut piece; the elastic member is a tension spring and is arranged on the first lock nut piece and The second locking nut piece is close to the inner side of one end of the movable block.
The medical charging control device for convenient control according to claim 8, wherein the lock nut piece comprises a first lock nut piece and a second lock nut piece, the first lock nut piece and the second lock nut piece The end of the lock nut piece away from the convex block is connected to the outer tube through a pin shaft. The convex block is located in the first lock nut piece and the second lock nut piece; the elastic member is a torsion spring, which is arranged at the pin shaft to The spring exerts a torsion force on the first lock nut piece and the second lock nut piece, so that the first lock nut piece and the second lock nut piece are radially inwardly biased near one end of the convex block.
The medical charging control device for convenient control according to any one of claims 9-11, wherein the first lock nut piece and the second lock nut piece pass through different ends away from the movable block. The pin shaft is connected with the outer tube.
The medical charging control device for convenient control according to any one of claims 9-11, wherein the inner side of the first lock nut piece and the second lock nut piece is provided with a circular arc surface , Change the contact position of the convex block and the arc surface to complete the locking and unlocking of the threaded push rod by the lock nut piece.