KR100910664B1 - Fluid injection apparatus for medical treatment and holder thereof - Google Patents

Abstract

A medical fluid injector and a holder for the same structure are provided, which can change the bound state of a piston simply and improve the speed of the fluid injector use. A medical fluid injector(100) comprises: a cylinder(110) in which the fluid discharge gate is formed in the front-end; a piston(120) which discharges the fluid of the cylinder through the fluid discharge gate at the predetermined pressure and in which a first screw thread is formed; and a holder(130) which is hinge-coupled with the back-end of the cylinder and changes the bound state of the piston by the switching manipulation.

Description

Fluid injection apparatus for medical treatment and holder thereof

The present invention relates to a medical fluid injector for inflation between adherent neural or muscular tissues or to inflate a medical inflator to secure a space for injecting a solution therapeutic material into a diseased body tissue.

In general, the human body has small blood vessels and small organs, so they can be easily damaged even by small impacts, and external foreign substances often block the small blood vessels or small organs, which can be life threatening. In most cases, this is an emergency situation in which a contaminant must be removed within a short time. In addition, when adhesions due to inflammation or cancer occur in fine blood vessels and small organs, the function is weakened and it is difficult to accurately administer the therapeutic drug to the diseased location, and thus, excessive antibiotics or anticancer drugs are administered.

In periodontal bone fusion in the dental field, the periodontal bone in the gum located in the maxillary joint is necrotic and neural and nerve or nerve tissues are often attached. Conventionally, the use of metallic instruments or high-heated equipment often causes damage to adhered nerves in the maxillary joint, causing facial paralysis and death.

In the emergency medical field, an airway tube caused by an accident is sometimes blocked by a foreign object. In this case, the patient has significant difficulty breathing and severely leads to death. Therefore, urgent first aid for quarreling of the minute seconds is required. In the past, airway tube dilatation using metallic instruments has been performed. However, depending on the type of esophageal damage or clogged foreign objects or the depth of the blockage caused by the metallic device, the metallic device has its limitations.

In addition, in the urethral dilatation in the area of internal medicine, the stones fall into the bladder and get into the urethra during urination. In this case, the patient complains of severe pain that they cannot walk. In the past, the urinary incision was used to remove stones or to use shock waves in vitro. However, scarring or tissue damage of the urinary tract was caused and recurrence rate was also high.

Therefore, in order to solve the above problems, a lot of mechanisms with an expandable structure have been proposed. An apparatus having an inflatable structure can adjust the size or pressure of the inflatable structure according to the size of blood vessels or the force of adhesion of nerve tissue or muscle tissue by using the air pressure generated in connection with the manual or electric power generating device. This principle solves the problem by exfoliating adherent neural or muscular tissues, and by expanding the organs blocked by foreign substances so that foreign substances can easily flow. In this case, in order to check the position and size of the expander, the sterilized distilled water and the contrast agent may be mixed in the pressure generating device. In addition, after solving the above problems, the treatment of damaged tissue using a solution therapeutic agent such as anticancer drugs or anti-inflammatory drugs as needed.

A technique for injecting a fluid such as air to inflate such a medical inflator has been proposed, among which the Republic of Korea Patent No. 10-0660121 (name of the invention: spinal restoration restorer. Technology '.

In the prior art, the balloon (expandable body) and the cylinder part and the compressor part can be configured in a detachable combination type, so that only the inflated body and the cylinder part can be discarded after use, and the compressor part can be used semi-permanently. And a medical fluid injector capable of decompression, i.e., locking and releasing of a cylinder pusher (piston) only by operation of a trigger.

However, these prior arts have the following problems. In the medical fluid injector according to the prior art, the locking and unlocking of the piston is triggered and the pistol grip type cylinder holder is adopted, which makes the structure complicated and requires many parts, making it difficult to manufacture. There was also some operational discomfort that required the trigger to continue to be pulled.

Accordingly, the problem to be solved by the present invention is to provide a medical fluid injector and a holder used therein that can be used quickly and accurately in a simple structure.

Medical fluid injector according to the present invention for achieving the above object is a cylinder with a fluid discharge port formed in the front end; A piston for discharging the fluid inside the cylinder through the fluid discharge port at a predetermined pressure and having a first screw thread formed therein; And a holder hinged to the rear end of the cylinder and capable of changing the binding state of the piston by a switching operation. It includes, The holder is provided with a second screw thread that can bind the piston on one side, the switch arm (switch arm) on the other side to perform a switching operation for setting the binding state for the piston by the binding means Holder body is formed; A holder shaft member which is a center of the movement in which the holder body is switched; And one side coupled to the holder body such that the second screw thread provided on the holder body is in contact with the first screw thread of the piston according to the switching operation, and the other side is coupled to the holder shaft member. And an auxiliary lever, wherein the binding to the piston according to the switching operation is performed by the holder body so that the second screw thread contacts the first screw thread while the auxiliary lever rotates at a predetermined angle about the holder shaft member. It is characterized by made by guiding the position movement.

Here, the holder body is provided with a confinement space in which the first screw thread of the piston is located between the second screw thread of the holder body and the switch arm, where the binding to the piston is made, and the auxiliary lever is predetermined in one direction. In another embodiment, the first screw thread of the piston and the second screw thread of the holder body are engaged with each other while rotating at an angle of, thereby causing the binding to the piston.

Further, the confinement space is characterized in that the rotation angle of the auxiliary lever rotates about the holder shaft member is defined to limit the interval between the second screw thread of the holder body in contact with or spaced apart from the piston do.

In this case, in the switching operation, a non-slip jaw is formed at the end of the switch arm to prevent the user's hand from slipping on the switch arm.

Here, the locking jaw is provided at the rear end of the cylinder and the locking projection corresponding to the locking jaw is provided at the rear end of the cylinder so that the position change of the holder which can change the binding state of the piston by the holder is not made arbitrarily. The locking projection is caught on the locking jaw, and when the external force is applied to a predetermined level, the locking projection is further characterized in that the position change of the holder is made beyond the locking jaw.

The holder of the fluid injector according to the present invention for achieving the above object is provided with a second screw thread that can bind the piston formed with the first screw thread on one side, and set the binding state for the piston with the second screw thread A holder body having a switch arm formed at the other side to allow a switching operation to be performed; A holder shaft member which is a center of the movement in which the holder body is switched; And a second side of the holder body coupled to the holder body such that one side thereof is movable relative to the holder body such that the second screw thread of the holder body contacts the first screw thread of the piston according to the switching operation, and the other side of which is coupled to the holder shaft member. And an auxiliary lever; wherein the binding to the piston according to the switching operation is performed by the holder body such that the second screw thread contacts the first screw thread while the auxiliary lever is rotated at a predetermined angle about the holder shaft member. It is characterized by made by guiding the position movement.

Here, the holder body is provided with a confinement space in which the first screw thread of the piston is located between the second screw thread of the holder body and the switch arm, where the binding to the piston is made, and the auxiliary lever is predetermined in one direction. In another embodiment, the first screw thread of the piston and the second screw thread of the holder body are engaged with each other while rotating at an angle of, thereby causing a bond to the piston.

Here, the confinement space is such that the rotation angle of the auxiliary lever rotates about the holder shaft member is defined so as to limit the interval in which the second screw thread of the holder body is in contact with or spaced apart from the first screw thread of the piston. It is characterized by another one formed in the holder body.

In this case, in the switching operation, a non-slip jaw is formed at the end of the switch arm in order to suppress the user's hand from sliding the switch arm.

Here, the switch arm is formed so as to extend in both directions with respect to the holder body, the length of each of the left and right formed by extending the switch arm is characterized in another one.

The medical fluid injector according to the present invention is hinged to the rear end of the cylinder and can be easily changed the binding state of the piston by a switching operation, the user is easy and easy to use because the switch arm of the holder is provided with an anti-slip means The convenience of operation that can reliably use the fluid injector is enhanced, and the recognition means for easily recognizing the switching operation direction has the advantage of improving the speed of using the fluid injector, and the structure of the fluid injector is simple. As a result, the fluid injector productivity is increased and the production cost can be reduced.

Hereinafter, with reference to the accompanying drawings to be described in more detail with respect to the present invention will be described with reference to a preferred embodiment.

1 is a perspective view schematically showing a medical fluid injector and a holder thereof according to an embodiment of the present invention.

Referring to FIG. 1, the medical fluid injector 100 according to an exemplary embodiment of the present invention includes a cylinder 110, a piston 120, and a holder 130.

The cylinder 110 provides a space in which fluid to inflate a medical inflatable (not shown), such as a balloon or catheter, is received before being supplied to the inflatable at a predetermined pressure. Here, fluid refers to a gas or a liquid, and typically air is mainly used, and a fluid suitable for the purpose of treatment may be used instead of air.

The fluid discharge port 111 is formed at the front end of the cylinder 110. The fluid is discharged at a predetermined pressure from the cylinder 110 through the fluid discharge port 111. The fluid discharge port 111 is coupled to the tube 115 in communication with the internal space of the cylinder (110).

A locking jaw 112 is provided at the rear end of the cylinder 110. The locking step 112 serves as a locking means together with the locking protrusions (see FIG. 3) provided in the holder 130 to be described later. That is, since the locking projection is slightly caught by the locking jaw 112, the binding state of the piston can be arbitrarily changed to suppress the release or the binding.

At the rear end of the cylinder 110, a holder shaft member insertion hole (not shown) into which the holder shaft member 133 of the holder 130 can be inserted is formed. The holder shaft member insertion hole is inserted into the holder shaft member (see FIG. 4) provided in the holder 130 to be described later, and supports the holder shaft member (see FIG. 4).

And it is preferable that the cylinder handle 113 is integrally formed in the cylinder 110. Since the cylinder handle 113 is formed in the cylinder 110, the cylinder handle 113 can be grasped to make handling or operation of the fluid injector 100 easier.

2 is a perspective view schematically showing a piston of a medical fluid injector according to an embodiment of the present invention.

1 and 2, the piston 120 discharges the fluid inside the cylinder 110 to the outside of the cylinder 110 through the fluid discharge port 111 of the cylinder 110 at a predetermined pressure. Part of the piston 120 is inserted into the cylinder (110).

The piston 120 includes a piston head 121 and a piston rod 122.

The piston head 121 is located at the front end of the piston 120 to push the fluid to the front end side of the cylinder 110 inside the cylinder 110. At this time, the pushing force acts as the pressure of the fluid so that the fluid is supplied to the medical expander (not shown). By the piston head 121, the fluid is discharged through the fluid discharge port 111 from the inside of the cylinder 110 at a predetermined pressure and introduced into the tube 115, and passes through the tube 115 for medical expansion (not shown). Go to the side. The piston head 121 may be provided with an O-ring, which is in close contact with the inner wall of the cylinder 110 for effective compression and leakage suppression.

The piston rod 122 is connected to the piston head 121 and is provided to push or pull the piston head 121 from the outside. The first screw thread 123 is formed in the piston 120. In other words, a first screw thread 123 is formed on an outer surface of the piston rod 122 of the piston 120, and the first screw thread 123 is a second screw thread 134 provided in the holder 130 to be described later. And the piston movement of the piston 120 is constrained. And by rotating the piston rod 122 to finely advance or reverse the piston head 121.

On the other hand, if the handle 124 is provided on the other side of the piston rod 122 is preferable because the piston rod 122 can be rotated to move forward or backward in detail.

3 is a front view schematically showing a holder of a medical fluid injector according to an embodiment of the present invention, Figure 4 is a perspective view schematically showing a holder of a medical fluid injector according to an embodiment of the present invention.

1 to 4, the holder 130 is hinged to the rear end of the cylinder 110 as being capable of changing the binding state of the piston 120. In addition, the binding state of the piston 120 may be changed by a switching operation.

The holder 130 includes a holder body 136, a holder shaft member 133, and an auxiliary lever 132, wherein the switching operation is performed by using a switch arm 139 of the holder body 136. By means of switching to the left and right about the holder shaft member 133 to move.

The holder body 136 is provided with a binding means capable of constraining the piston 120 on one side, and is capable of constraining the piston 120 with the restraining means according to a switching operation (that is, a constrained state with respect to the piston 120). The switch arm is formed on the other side of the holder body 136.

Here, the binding means may be a thread or a rubber packing as to bind the piston movement of the piston 120, in the embodiment of the present invention has shown the second screw thread 134 as an example of the binding means.

The switch arm 139 formed on the holder body 136 is formed on the other side of the holder body 136 so that the position of the holder body 136 is changed according to the switching operation of the user to bind the piston 120.

The switch arm 139 is provided with non-slip means for preventing the user's finger or hand from slipping in the switch arm 139 during the switching operation of the user.

3 to 6 illustrate non-slip jaws 137 and 138 that protrude upward from both ends of the switch arm.

Since there are non-slip jaws 137 and 138, which protrude from both ends of the switch arm 139, the user's finger slips on the switch arm 139 even if the user touches the switch arm 139 while wearing medical gloves. Is suppressed. Therefore, it can help to make the switching operation exactly as the user intended.

In addition, the switch arm 139 is preferably provided with a recognition means that can be quickly recognized at a glance to which side should be pressed during the switching operation of the user to bind or release the piston 120. When urgently operating the holder 130 of the medical fluid injector 100 in an emergency situation, the switch arm 139 of the holder 130 must be switched to either direction to quickly switch the piston 120 to be bound or unbound. This is because it is necessary to be able to recognize whether or not it can be done quickly and accurately first aid.

As an example of the recognition means, the shape of the switch arm 139 extending in both directions with respect to the holder body 136 may be different or there may be an identification mark.

In the embodiment of the present invention, the holder body 136 (that is, the holder body 136) can be easily recognized as an example of such a recognition means so that the user can easily recognize the switching operation direction that can realize the desired binding state of the piston 120. 3 to 5 show that the lengths b and a of the left and right sides of the switch arm extending in both directions are different from each other. As shown in the drawing, the lengths b and a of the switch arms extending in both the left and right directions with respect to the holder body 136 are different from each other. That is, the length a of the switch arm 139 on the A side is easier than the length b of the switch arm 139 on the B side to release the bond so that the A side is easily pressed to bind the piston 120. It is formed long.

Therefore, the user can easily recognize that the piston 120 is constrained by the holder 130 by pressing the A side of the switch arm 139 with a long length (a). It will help you take it.

The holder shaft member 133 becomes the center of the movement of the holder body 136 is switched. That is, the position of the holder body 136 is changed from side to side with respect to the holder shaft member 133. The holder shaft member 133 is hingedly coupled to the rear end of the cylinder 110.

The auxiliary lever 132 assists the holder 130 (more precisely, the holder body 136 of the holder 130) to bind the movement of the piston 120. The auxiliary lever 132 is movably coupled to the holder 130. That is, the auxiliary lever 132 is the second screw thread 134, which is a binding means provided in the holder body 136, so as to be in contact with the piston 120 in accordance with the switching operation of the user (more precisely of the piston rod 122 One side is coupled to the holder body 136 so as to be movable relative to the holder body 136 so as to be in contact with the first screw thread 123.

And the other side of the auxiliary lever 132 is coupled to the holder shaft member 133 hinged to the rear end of the cylinder 110 while holding the center of the movement of the holder 130.

Then, one end of the auxiliary lever 132 rotates at a predetermined angle with respect to the holder shaft member 133, so that the second screw thread 134 as the binding means is connected to the piston 120 (more precisely, the first screw thread of the piston rod 122). By guiding the positional movement of the holder body 136 in contact with (123)), the binding to the piston 120 according to the switching operation is made.

The holder body 136 is moved to change the binding state of the piston 120 with the aid of the auxiliary lever 132 by a switching operation around the axis of the holder 130 hinged to the cylinder 110.

On the other side of the auxiliary lever 132, a locking projection 131 is formed. The auxiliary lever 132 is coupled to the holder body 136 through the locking protrusion 131 to move about the locking protrusion 131 with respect to the holder body 136.

The locking protrusion 131 serves as a locking means between the holder 130 and the rear end of the cylinder 110 together with the locking step 112 provided at the rear end side of the cylinder 110.

That is, the locking protrusion 131 is caught by the locking jaw 112 of the cylinder 110 to suppress the user from unintentionally switching the position of the holder 130. Since the position change of the holder 130 is not arbitrarily made by the locking means such as the locking protrusion 131 and the locking step 112, the binding state of the piston 120 is arbitrarily changed to suppress the release or the binding. Can be.

In other words, when a certain amount of external force is applied, such as when the user manipulates (switching) the holder body 136 of the holder 130, the locking protrusion 131 passes over the locking jaw 112 and the holder 130. ), The binding state of the piston 120 is changed as the position is changed, and unless the user manipulates the holder body 136 of the holder 130, the locking projection 131 is caught on the locking jaw 112. No change of the bound state occurs.

The holder body 136 is provided with a confining space 135 to allow the piston rod 122 of the piston 120 to pass therethrough. In other words, a portion of the piston rod 122 of the piston 120 in which the first screw thread 123 is formed in the holder body 136 is located between one side and the other side of the holder body 136 so that the bond to the piston 120 is fixed. Bondage spaces are provided.

In addition, a second screw thread 134 is formed on the holder body 136, and is formed inside the holder body 136 toward the binding space 135 to be engaged with the first screw thread 123 formed on the piston 122. It is.

The second screw thread 134 of the holder body 136 is engaged with the first screw thread 123 formed in the piston 122 by the user switching the holder 130. That is, while the auxiliary lever 132 is rotated at a predetermined angle in one direction, one side of the holder body 136 is moved to a portion side of the piston 120 (more specifically, to the piston rod 122 side).

The first screw thread 123 and the second screw thread provided on one side of the holder body 136 are formed on a part of the piston 120 that is spaced apart in the confining space 135 (that is, a part of the piston rod 122). The engagement of the 134 with each other results in a bond to the piston 120.

In more detail, the holder shaft member 133 penetrates the bond space 135. In addition, since the holder shaft member 133 is in contact with a part of the holder body 136 in the confinement space 135 during the switching operation of the user, an interval at which one end of the holder body 136 contacts or is spaced apart from the piston 120 is limited. do.

In addition, since the holder shaft member 133 is in contact with a part of the holder body 136 in the binding space 135 during the switching operation, one end of the auxiliary lever 132 rotates with respect to the holder shaft member 133 at a predetermined angle. It will rotate in range.

Here, the predetermined angle range will be briefly described. The auxiliary lever 132 rotates in one direction about the holder shaft member 133 by a switching operation, and the holder shaft member 133 is held in the binding space 135. Contact with a portion of 136 prevents it from continuing to rotate in the direction of rotation. On the contrary, even when the auxiliary lever 132 rotates in the other direction about the holder shaft member 133, the holder shaft member 133 is in contact with a part of the holder body 136, so that rotation in the other direction is impossible. do. Therefore, the rotation range in which the auxiliary lever 132 can be rotated about the holder shaft member 133 (in some embodiments, the holder shaft member 133 can be rotated about the auxiliary lever 132) is limited. do.

As shown in FIGS. 3 and 4, the second screw thread 134, which is a binding means, comes into contact with the first screw thread 123 formed on the piston rod 122 of the piston 120 and stops without being spaced again. It is preferable that the cross section of the confinement space 135 perpendicular to the holder shaft member 133 is provided in the holder body 136 in an asymmetrical shape. Here, the asymmetric shape refers to a shape in which the left and right are not symmetrical when both sides of the confined space 135 are viewed in both directions, as referred to in FIGS. 3 and 4.

The cross section of the binding space 135 perpendicular to the holder shaft member 133 has an asymmetrical shape, and the auxiliary lever 132 is rotated in one direction about the holder shaft member 133 so that the second screw thread 134 is a binding means. When the first screw thread 123 of the piston rod 122 is in contact with each other, the holder body 136 and the holder shaft member 133 are also in contact with each other to stop without further rotation in one direction. One end of the holder body 136 is in contact with or spaced apart from the piston 120 is limited.

As such, when the second screw thread 134 of the holder body 136 and the first screw thread 123 of the piston 122 are engaged, linear motion in the axial direction (that is, piston motion) is constrained.

In addition, the piston rod 121 may be moved forward or backward in detail by rotating the piston rod 122 while the second screw thread 134 of the holder body 136 and the first screw thread 123 of the piston 122 are engaged with each other. It becomes possible.

Therefore, the user can operate the fluid injector 100 finely by rotating the piston rod 122.

FIG. 5 is a cross-sectional view illustrating a medical fluid injector and a holder thereof according to an embodiment of the present invention in a state in which a piston of the fluid injector is constrained.

1 to 5, when the user presses the A portion of the switch arm 139 of the holder 130, the holder protrusion 131 moves toward the A side while the locking protrusion 131 crosses the locking jaw 112. The position shift of the holder body 136 occurs around the holder shaft member 133 of the holder 130.

At this time, the shortest distance from the other end of the auxiliary lever 132 to the second screw thread 134 of the holder body 136 is shortened and the first screw thread 123 of the piston 122 and the holder body 136 are made. The two screw threads 134 mesh with each other.

In other words, when the holder body 136 is moved around the holder shaft member 133 toward the A side, the auxiliary lever 132 pulls the other end of the holder body 136 toward the piston rod 122. At this time, as shown in FIG. 5, the second screw thread 134, which is a binding means provided on the other side of the holder body 136, comes into contact with the first screw thread 123 of the piston rod 122.

In particular, the cross-section of the binding space 135 perpendicular to the holder shaft member 133 is asymmetrical in shape, and one end of the auxiliary lever 132 is rotated in the A-direction about the holder shaft member 133 to be a binding means. When the thread 134 is in contact with the first screw thread 123 of the piston rod 122, the piston 134 is no longer rotated to the A side and stops, and the piston 120 is bound.

6 is a cross-sectional view illustrating a medical fluid injector and a holder thereof according to an embodiment of the present invention, in which the piston of the fluid injector is not bound.

1 to 4 and 6, when the user presses the portion B of the holder 130, the holder protrusion of the holder 130 is moved to the B side while the locking protrusion 131 is moved beyond the locking jaw 112 again. Repositioning of the holder body 136 occurs around the member 133.

Here, the shortest distance from the other end of the auxiliary lever 132 to the second screw thread 134 of the holder body 136 is increased, and the first screw thread 123 of the piston 122 and the second of the holder body 136 are extended. The engaged states of the threads 134 are released. Therefore, the bondage of the piston 122 is released.

In other words, when the holder body 136 is moved around the holder shaft member 133 toward the B side, the auxiliary lever 132 pushes the other end of the holder body 136 out of the piston rod 122.

At this time, as shown in FIG. 6, the state where the second screw thread 134, which is a binding means provided on the other side of the holder body 136, and the first screw thread 123 of the piston rod 122 are engaged with each other, are released. . Thus, the bondage of the piston 120 is released.

As described above, the binding state of the piston 120 by the holder 130 is determined by the switching operation of pressing the portion A or portion B of the switch arm 139.

And because there is a locking projection 112 formed on the locking projection 131 and the cylinder 110, the user does not need to keep pressing the switch arm 139 of the holder 130, the holder 130 only when changing the bond state By pressing the switch arm 139 of the) it is possible to use the fluid injector more quickly and conveniently.

Meanwhile, the medical fluid injector according to the embodiment of the present invention may further include a pressure gauge 140 and a T-shaped valve 150.

As shown in FIG. 1, the pressure gauge 140 may be provided at the front end side of the cylinder 110. The pressure gauge 140 measures the pressure of the fluid discharged from the cylinder 110 through the fluid discharge port 111. The user may know the pressure of the fluid discharged from the cylinder 110 with reference to the pressure gauge 140.

A T-shaped valve (also called a three-sided cock) 150 is coupled to one end of the tube 115 connected in communication with the fluid outlet 111 of the cylinder 110 to switch or block the flow of fluid. Valve.

The inflow of fluid may be controlled by rotating the valve plug of the T-shaped valve 150, and the rotation angle of the valve plug of the T-shaped valve 150 may be adjusted to interrupt the inflow and outflow of the fluid or block the flow of the fluid.

As described above, the medical fluid injector and the holder thereof according to the present invention have a holder hinged to the rear end of the cylinder and can simply change the binding state of the piston by a switching operation. Because of this, the user can use the medical fluid injector quickly and accurately. Therefore, there is an advantage that the fluid injector can be operated easily and quickly and precisely when needed, and because the structure is simple, the productivity of the medical fluid injector can be increased and the production cost can be reduced.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings, but since the above-described embodiments have only been described with reference to the preferred examples of the present invention, the present invention has been described above. It should not be understood to be limited only to the embodiments, and the scope of the present invention should be understood by the claims and equivalent concepts described below.

1 is a cross-sectional view schematically showing a medical fluid injector according to an embodiment of the present invention.

2 is a perspective view schematically showing a piston of a medical fluid injector according to an embodiment of the present invention.

3 is a front view schematically showing a holder of a medical fluid injector according to an embodiment of the present invention.

4 is a perspective view schematically showing a holder of a medical fluid injector according to an embodiment of the present invention.

5 is a cross-sectional view showing a state in which the piston is bound as schematically showing a medical fluid injector and a holder thereof according to an embodiment of the present invention.

6 is a cross-sectional view schematically showing a medical fluid injector and a holder thereof according to an embodiment of the present invention as a piston is not bound.

<Description of Symbols for Main Parts of Drawings>

100: medical fluid injector 110: cylinder

111: fluid discharge port 113: cylinder handle

120: piston 121: piston head

122: piston rod 130: holder

Claims (10)

A cylinder having a fluid discharge port formed at a front end portion thereof; A piston for discharging the fluid inside the cylinder through the fluid discharge port at a predetermined pressure and having a first screw thread formed therein; And A holder hinged to the rear end of the cylinder and capable of changing the binding state of the piston by a switching operation; Including, The holder is A holder body having a second screw thread capable of constraining the piston on one side, and a switch arm formed on the other side so as to perform a switching operation for setting the confinement state of the piston with the constraining means; A holder shaft member which is a center of the movement in which the holder body is switched; And The second screw thread provided in the holder body is coupled to the holder body so that one side is movable relative to the holder body so that the second screw thread is in contact with the first screw thread of the piston according to the switching operation, and the other side is coupled to the holder shaft member. A lever; Bondage to the piston in accordance with the switching operation And the auxiliary lever rotates at a predetermined angle with respect to the holder shaft member, thereby guiding the movement of the holder body so that the second screw thread contacts the first screw thread. The method of claim 1, The holder body is provided with a confinement space in which the first screw thread of the piston is located between the second screw thread of the holder body and the switch arm, where the binding to the piston is made. The auxiliary lever is rotated at a predetermined angle in one direction while the first screw thread of the piston and the second screw thread of the holder body which are spaced apart in the binding space is engaged with each other, medical bonds are made. Fluid injector The method of claim 2, The confinement space is a medical fluid injector, characterized in that the rotation angle of the auxiliary lever rotates about the holder shaft member is defined to define the interval in which the second screw thread of the holder body in contact with or spaced apart from the piston. The method of claim 1, The medical fluid injector, characterized in that the non-slip jaw is formed on the end of the switch arm in order to suppress the user's hand slips from the switch arm when the switching operation. The method of claim 1, The locking jaw is provided at the rear end of the cylinder so that the position change of the holder, which can change the binding state of the piston by the holder, is provided, and the locking projection corresponding to the locking jaw is provided on the auxiliary lever. The jaw is caught in the jaw, Medical fluid injector, characterized in that when the predetermined force or more external force is applied, the locking projection is over the locking step to change the position of the holder. A holder body having a second screw thread which can bind the piston in which the first screw thread is formed on one side, and a switch arm formed on the other side so as to perform a switching operation for setting the binding state of the piston with the second screw thread; A holder shaft member which is a center of the movement in which the holder body is switched; And An auxiliary portion coupled to the holder body such that one side thereof is movable relative to the holder body so that the second screw thread of the holder body is in contact with the first screw thread of the piston according to the switching operation. A lever; Bondage to the piston in accordance with the switching operation And the auxiliary lever rotates at a predetermined angle about the holder shaft member, thereby guiding the positional movement of the holder body so that the second screw thread contacts the first screw thread. The method of claim 6, The holder body is provided with a confinement space in which the first screw thread of the piston is located between the second screw thread of the holder body and the switch arm, where the binding to the piston is made. While the auxiliary lever rotates at a predetermined angle in one direction, the first screw thread of the piston and the second screw thread of the holder body are engaged with each other so that the piston is bound to the piston. Holder of the fluid injector. The method of claim 7, wherein The restraint space may be configured such that the holder is configured such that a rotation angle of the auxiliary lever is rotated about the holder shaft member to define a distance at which the second screw thread of the holder body is in contact with or spaced apart from the first screw thread of the piston. Holder of a fluid injector characterized in that formed on the body. The method of claim 6, And a non-slip jaw is formed at the end of the switch arm to prevent the user's hand from slipping on the switch arm when the switching operation is performed. The method of claim 6, The switch arm is formed to extend in both directions with respect to the holder body, Holder of the fluid injector, characterized in that the length of each of the left and right formed to extend the switch arm is different.

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