Automatic injection head and push rod for high-pressure injector

Abstract

The present invention discloses an automatic injection head for high-pressure syringes, comprising a shell assembly, which is a hollow cavity; a circuit board fixedly arranged in the shell assembly; a contact head penetrating the upper end of the shell assembly, which can move relative to the shell assembly; an elastic member and a first sensing device arranged in the shell assembly and below the contact head, the first sensing device monitoring the movement of the contact head in real time; a cam plate arranged below the circuit board; at least two ejector rods movably arranged on the cam plate, at least two ejector rods being able to extend out of the shell assembly under the drive of the cam plate; a power device arranged below the cam plate and connected to the cam plate; and a second sensing device arranged below the circuit board. The present invention also discloses a push rod. The present invention can realize the automatic connection and disconnection functions of the injection head and the syringe.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automatic injection head and a push rod used in a high-pressure syringe. Background Art

[0002] In the treatment of cardiovascular diseases, in order to accurately understand the condition of the patient's blood vessels, contrast agents are often injected into the blood vessels through a pusher for angiography. The contrast agent pushers currently used in clinical practice generally use automatic push injection for injection. During the injection process, the push rod may be offset from the contact point of the syringe piston due to some reasons, resulting in the push rod being difficult to separate from the syringe piston. At the same time, it may cause contrast agent leakage, equipment pollution, blockage and oxidation, which increases the difficulty of work for medical staff. Therefore, in view of the shortcomings of the above scheme in actual production and implementation, it is revised and improved. At the same time, in the spirit and concept of seeking for excellence, with the assistance of professional knowledge and experience, and after many ingenuity and experiments, this design is created. Therefore, an automatic push head and push rod for high-pressure syringes are provided to solve the above problems. Summary of the invention

[0003] One of the purposes of the present invention is to provide an automatic injection head and a push rod for a high-pressure injector so as to solve the above-mentioned problems.

[0004] The automatic injection head and push rod for high-pressure injectors of the present invention can be realized by the following technical solutions:

[0005] The present invention discloses an automatic injection head for a high-pressure syringe, comprising a shell assembly which is a hollow cavity; a circuit board fixedly arranged in the shell assembly; a contact head penetrating the upper end of the shell assembly and capable of moving relative to the shell assembly; an elastic member and a first sensing device arranged in the shell assembly and below the contact head, the first sensing device monitoring the movement of the contact head in real time; a cam plate arranged below the circuit board; at least two ejector rods movably arranged on the cam plate, the ejector rods being able to extend out of the shell assembly under the action of the cam plate; a power device arranged below the cam plate and connected to the cam plate, which drives the cam plate to rotate; and a second sensing device arranged below the circuit board, which detects the state of the ejector rod extending out of the shell assembly.

[0006] In one embodiment, the housing assembly includes a sensing cylinder and a sensing cylinder head, and the sensing cylinder head is detachably disposed above the sensing cylinder through a snap structure or a screw structure.

[0007] In one embodiment, the sensing tube body is in the shape of a hollow cylinder, and the sensing tube head is in the shape of a cap.

[0008] In one embodiment, a plurality of through holes are provided on the side of the sensing cylinder, and the positions and numbers of the through holes correspond to the positions and numbers of the ejector rods, respectively. The ejector rods pass through the housing assembly through the corresponding through holes.

[0009] In one embodiment, the elastic member is a spring, one end of which is connected to the contact head, and the other end of which is connected to the cam plate.

[0010] In one embodiment, the first sensing device includes a first magnet and a first Hall element. The first magnet is fixedly disposed in the contact head, and the first Hall element is disposed on the front side of the circuit board and faces the first magnet.

[0011] In one embodiment, the second sensing device includes at least one second magnet and at least one second Hall element, the at least one second magnet is fixedly disposed on the cam plate and rotates with the rotation of the cam plate, and the at least one second Hall element is fixedly disposed on the back of the circuit board.

[0012] In one embodiment, both the first magnet and the second magnet are magnets.

[0013] In one embodiment, a plurality of slide grooves are arranged on the cam plate, and the push rods are movably arranged in the corresponding slide grooves respectively.

[0014] A push rod comprises the push head, rod body and mounting member described in any one of the above items, wherein the push head, rod body and mounting member are connected in sequence.

[0015] Compared with the prior art, the automatic injection head and the push rod applied to the high-pressure injector of the present invention have the following beneficial effects:

[0016] The present invention provides an automatic injection head and a push rod applied to a high-pressure syringe. The movement of the injection head is sensed by a sensing device to control the rotation of a power device. The power device drives the cam plate to rotate. The slide groove on the cam plate drives the push rod to extend out of the housing assembly. At the same time, another sensing device is used to sense the rotation angle of the cam plate to control the power device to stop working, thereby effectively realizing the automatic connection function between the injection head and the syringe. When the injection is completed, the power device reverses and drives the cam plate to rotate. The cam plate drives the push rod to extend back into the housing assembly, thereby effectively realizing the automatic separation function between the injection head and the syringe. This device has the characteristics of ingenious structure and strong operability, and has certain promotion potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of an automatic injection head applied to a high-pressure injector of the present invention;

[0019] Figure 2 yes Figure 1 The front structural schematic diagram of an automatic injection head applied to a high-pressure injector of the present invention is shown;

[0020] Figure 3 yes Figure 1 The cross-sectional structure diagram of an automatic injection head applied to a high-pressure injector of the present invention is shown;

[0021] Figure 4 yes Figure 1 The exploded structure schematic diagram of an automatic injection head for a high-pressure injector according to the present invention is shown;

[0022] Figure 5 yes Figure 1 The structure diagram of a cam in an automatic injection head for a high-pressure injector according to the present invention is shown;

[0023] Figure 6 It is a structural schematic diagram of a push rod of the present invention.

[0024] Indications in the figure: 10, injection head; 11, housing assembly; 111, sensing cylinder; 1111, through hole; 112, sensing cylinder head; 12, circuit board; 13, contact head; 14, elastic member; 15, first sensing device; 151, first magnet; 152, first Hall element; 16, cam plate; 161, slide groove; 162, mounting hole; 17, push rod; 18, power device; 181, mounting plate; 19, second sensing device; 191, second magnet; 192, second Hall element; 20, rod body; 30, mounting member. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0029] In addition, in the present invention, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] See also Figure 1-Figure 4The present invention discloses an automatic injection head 10 for a high-pressure syringe, which mainly includes a housing assembly 11, a circuit board 12, a contact head 13, an elastic member 14, a first sensing device 15, a cam plate 16, a push rod 17, a power device 18 and a second sensing device 19; the housing assembly 11 is a hollow cavity; the circuit board 12 is fixedly arranged in the housing assembly 11; the contact head 13 passes through the upper end of the housing assembly 11 and can move relative to the housing assembly 11; the elastic member 14 is arranged in the housing assembly 11 and below the contact head 13, and its function is to give the contact head 13 a restoring force; the first sensing device 15 is arranged in the housing assembly 11 and below the contact head 13, and its function is to monitor the downward movement of the contact head 13 and transmit a signal to the control board to control the The power device 18 starts to rotate; the cam plate 16 is arranged below the circuit board 12 and connected to the power device 18, and can rotate relative to the circuit board 12 under the drive of the power device 18; at least two of the push rods 17 are movably arranged on the cam plate 16 and can extend out of the housing assembly 11; the power device 18 is arranged below the cam plate 16, and its function is to drive the cam plate 16 to rotate; the second sensing device 19 is arranged below the circuit board 12, and its function is to detect whether the push rod 17 extends out of the housing assembly 11 to the right position, and when the push rod 17 extends out of the housing assembly 11 to the right position, a signal is transmitted to the control board to control the power device 18 to stop rotating; the circuit board 12 is electrically connected to the first sensing device 15 and the second sensing device 19 respectively.

[0033] See also Figure 1 , Figure 3 and Figure 4 The housing assembly 11 comprises a sensing cylinder 111 and a sensing cylinder head 112. The sensing cylinder head 112 is detachably arranged on the top of the sensing cylinder 111 through a snap structure or a screw structure. In the present embodiment, the sensing cylinder head 112 is detachably arranged on the top of the sensing cylinder 111 through a screw structure. The sensing cylinder 111 is in the shape of a hollow cylinder, and the sensing cylinder head 112 is in the shape of a cap. A plurality of through holes 1111 are arranged on the side of the sensing cylinder 111. The positions and numbers of the through holes 1111 correspond to the positions and numbers of the ejector pins 17 respectively. The ejector pins 17 penetrate the housing assembly 11 through the corresponding through holes 1111 respectively. A contact hole is arranged on the top of the sensing cylinder head 112. The contact head 13 penetrates the sensing cylinder head 112 through the contact hole.

[0034] See also Figure 3 and Figure 4In this embodiment, the elastic member 14 is a spring, one end of which is connected to the contact head 13, and the other end of which is connected to the cam plate 16. When the contact head 13 is subjected to a downward force, the elastic member 14 begins to compress. When the external force acting on the contact head 13 disappears, the elastic member 14 pushes the contact head 13 back to the initial position under the action of the restoring force. In this embodiment, the first sensing device 15 includes a first magnet 151 and a first Hall element 152. The first magnet 151 is fixedly arranged in the contact head 13. The first Hall element 152 is arranged on the front of the circuit board 12 and faces the first magnet 151. When the contact head 13 drives the first magnet 151 to move downward, the first Hall element 152 transmits a signal to the control board, and the control board controls the power device 18 to start working. The first magnet 151 is a magnet.

[0035] See also Figure 3-Figure 5In this embodiment, a plurality of slide grooves 161 are provided on the cam plate 16, and the push rods 17 are movably arranged in the corresponding slide grooves 161. When the power device 18 drives the cam plate 16 to rotate, the push rods 17 move in the corresponding slide grooves 16, so that the gear lever 17 is extended or retracted into the housing assembly 11; in this embodiment, the slide groove 16 is an arc groove, and three slide grooves 161 are provided on the cam plate 16. The three push rods 17 are movably arranged in the corresponding slide grooves 161. When the power device 18 drives the cam plate 16 to rotate, the slide grooves 161 act on the corresponding push rods 17, so that the push rods 17 extend out of the housing assembly 11; a mounting hole 162 is provided in the middle of the cam plate 16, and the power device 18 is connected to the cam plate 16 through the mounting hole 162. In this embodiment, the power device 18 is a motor, and a mounting plate 181 is fixedly arranged in the housing assembly 11, and the power device 18 is fixedly arranged on the mounting plate 181. The second sensing device 19 includes at least one second magnet 191 and at least one second Hall element 192, at least one second magnet 191 is fixedly arranged on the cam plate 16, and rotates with the rotation of the cam plate 16, and at least one second Hall element 192 is fixedly arranged on the back of the circuit board 12, and the number of the second magnet 191 and the second Hall element 192 is the same. When the second magnet 191 rotates with the cam plate 16 to the right below the corresponding second Hall element 192, the second Hall element 192 transmits a signal to the control board, and the control board controls the power device 18 to stop working, and at the same time, the ejector 17 extends out of the housing assembly 11 and engages in the syringe. In this embodiment, two second magnets 191 are symmetrically arranged on the cam plate 16, and two second Hall elements 192 are symmetrically arranged on the back of the circuit board 12, and the second magnet 191 is a magnet.

[0036] See also Figure 6 The push rod of the present invention includes a push rod 10, a rod body 20 and a mounting member 30. The rod body 20 is arranged at the tail end of the push rod 10, and the mounting member 30 is arranged at the tail end of the rod body 20, and is fixedly connected through the mounting member 30.

[0037] It should be noted that the working process of an automatic injection head for a high-pressure syringe of the present invention is as follows: the contact head 13 contacts the rubber plug in the syringe, and under the force of the rubber plug, the contact head 13 moves downward, and at the same time, the contact head 13 compresses the elastic member 14, and the first magnet 151 moves with the movement of the contact head 13, so that the first Hall element 152 transmits a signal to the control board, and the control board controls the power device 18 to start working, and the power device 18 drives the cam plate 16 to rotate, and the push rod 17 moves in the slide groove 161, so as to extend the housing assembly 11 and open and close with the base in the syringe to achieve a fixed connection, and when the second magnet 191 fixedly arranged on the cam plate 16 moves with the movement of the contact head 13, the first Hall element 152 transmits a signal to the control board, and the control board controls the power device 18 to start working, and the power device 18 drives the cam plate 16 to rotate, and the push rod 17 moves in the slide groove 161, thereby extending the housing assembly 11 and opening and closing with the base in the syringe to achieve a fixed connection, When the cam plate 16 rotates to the position directly below the corresponding second Hall element 192, that is, when the push rod 17 is fully extended from the housing assembly 11, the second Hall element 192 transmits a signal to the control panel, and the control panel controls the power device 18 to stop working, completes the connection between the injection head 10 and the syringe, drives the rod body 20 to move through an external force, and the rod body 20 drives the injection head 10 to move in the syringe; after the injection is completed, the control panel gives the power device 18 a reverse signal, so that the power device 18 drives the cam plate 16 to rotate in the opposite direction, and the cam plate 16 drives the push rod 17 to extend back into the housing assembly 11, so that the injection head 10 is separated from the syringe.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An automatic injection head for a high-pressure injector, characterized in that: The invention comprises a shell assembly, which is a hollow cavity; a circuit board fixedly arranged in the shell assembly; a contact head penetrating the upper end of the shell assembly and capable of moving relative to the shell assembly; an elastic member and a first sensing device arranged in the shell assembly and below the contact head, the first sensing device monitoring the movement of the contact head in real time; a cam plate arranged below the circuit board; at least two ejector rods movably arranged on the cam plate, at least two ejector rods being able to extend out of the shell assembly driven by the cam plate; a power device arranged below the cam plate and connected to the cam plate, driving the cam plate to rotate; a second sensing device arranged below the circuit board, which detects in real time the state of the ejector rod extending out of the shell assembly; The first sensing device comprises a first magnet and a first Hall element, wherein the first magnet is fixedly disposed in the contact head, and the first Hall element is disposed on the front side of the circuit board and faces the first magnet; The second sensing device includes at least one second magnet and at least one second Hall element, the at least one second magnet is fixedly arranged on the cam plate and rotates with the rotation of the cam plate, and the at least one second Hall element is fixedly arranged on the back of the circuit board; The cam plate is provided with a plurality of slide grooves, and the push rods are movably arranged in the corresponding slide grooves respectively.

2. The automatic injection head for high-pressure injectors according to claim 1, characterized in that: The housing assembly comprises a sensing cylinder and a sensing cylinder head, and the sensing cylinder head is detachably arranged above the sensing cylinder through a snap structure or a screw structure.

3. The automatic injection head for high-pressure injectors according to claim 2, characterized in that: The induction tube body is in the shape of a hollow cylinder, and the induction tube head is in the shape of a cap.

4. The automatic injection head for high-pressure injectors according to claim 2, characterized in that: A plurality of through holes are arranged on the side of the induction cylinder, and the positions and numbers of the through holes correspond to the positions and numbers of the push rods respectively, and the push rods pass through the housing assembly respectively through the corresponding through holes.

5. The automatic injection head for high-pressure injectors according to claim 1, characterized in that: The elastic member is a spring, one end of which is connected to the contact head, and the other end of which is connected to the cam plate.

6. The automatic injection head for high-pressure injectors according to claim 1, characterized in that: The first magnet and the second magnet are both magnets.

7. A push rod, characterized in that: It comprises the injection head, rod body and mounting member as described in any one of claims 1 to 6, wherein the injection head, rod body and mounting member are connected in sequence.

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