A syringe

Abstract

The application discloses an injector, comprising: an injector body, comprising a cylinder, one end of the cylinder being provided with a needle cylinder or a needle cylinder interface for mounting the needle cylinder, the needle cylinder being provided with a needle cylinder piston; an injector driving device, comprising a motor, a belt wheel mechanism and a lead screw mechanism arranged in the cylinder, a driven belt wheel of the belt wheel mechanism being arranged on a screw rod of the lead screw mechanism, a nut of the lead screw mechanism being used for driving the needle cylinder piston to move, the motor being in transmission connection with a driving belt wheel of the belt wheel mechanism; and a tensioning device, comprising a tensioning seat and a tensioning elastic member, one end of the tensioning elastic member being connected to the tensioning seat, the other end of the tensioning elastic member being connected to the motor, so as to drive the driving belt wheel to move away from the driven belt wheel. The application can keep the tensioning state of the synchronous belt between the driving belt wheel and the driven belt wheel, improve the transmission precision of the injector, and reduce the error deviation caused by the relaxation of the synchronous belt due to the fact that the synchronous belt is not tensioned in place or is operated for a long time.

Description

Technical Field

[0001] This application relates to the field of interventional surgical equipment technology, and more specifically, to a syringe. Background Technology

[0002] Endovascular intervention is a minimally invasive treatment method that involves creating a tiny channel in a blood vessel or skin without surgical exposure of the lesion, and then treating the lesion locally under the guidance of imaging equipment. Currently, in clinical practice, a guidewire is typically used to assist in the placement of a catheter into the patient's lesion site during interventional treatment.

[0003] Doctors will administer different doses of contrast agent depending on the location of the guidewire / catheter during the procedure to achieve the desired imaging effect. Currently, a syringe is used to deliver the appropriate dose of contrast agent to the corresponding site.

[0004] Currently, the power drive structure of syringes mainly uses a motor and synchronous belt transmission structure to convert the rotational motion of the motor into the linear forward and backward motion of the lead screw mechanism. The forward and backward movement of the lead screw mechanism drives the piston movement of the syringe, thereby dispensing the contrast agent. However, because the synchronous belt is a flexible transmission component, it will loosen after prolonged operation, compromising transmission accuracy and leading to larger errors in the dispensing dosage.

[0005] Therefore, ensuring transmission accuracy and reducing errors in the delivery dosage are problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this application is to provide a syringe that ensures transmission accuracy and reduces errors in the delivery dosage.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] The first aspect of this application provides a syringe, comprising:

[0009] The syringe body includes a cylinder, one end of which is provided with a syringe or a syringe interface for installing a syringe, and a syringe piston is provided inside the syringe.

[0010] The syringe driving device includes a motor, a pulley mechanism, and a lead screw mechanism disposed within the cylinder. The driven pulley of the pulley mechanism is disposed on the lead screw of the lead screw mechanism, and the lead screw nut is used to drive the movement of the syringe piston. The motor is connected to the driving pulley of the pulley mechanism.

[0011] The tensioning device includes a tensioning seat and a tensioning elastic element. One end of the tensioning elastic element is connected to the tensioning seat, and the other end is connected to the motor to drive the driving pulley to move away from the driven pulley.

[0012] In one possible implementation, the motor is fixed to a motor bracket, and the tensioning device further includes a positioning pin, which is fixed to one of the tensioning seat and the motor bracket and slides with the other.

[0013] The tensioning elastic element is sleeved on the positioning pin, with one end abutting against the tensioning seat and the other end abutting against the motor bracket.

[0014] In one possible implementation, fasteners for securing the motor bracket to the tensioning seat are also included;

[0015] The tensioning seat is provided with a fastening hole, and the motor bracket is provided with a strip hole corresponding to the fastening hole. The strip hole extends along the arrangement direction of the driving pulley and the driven pulley, and the fastener passes through the strip hole and engages with the fastening hole.

[0016] In one possible implementation, a protective housing fixed to the motor bracket is also included, the protective housing covering the outside of the pulley mechanism.

[0017] In one possible implementation, one end of the cylinder is provided with the syringe interface, and the syringe is detachably connected to the syringe interface;

[0018] The end of the lead screw extending outside the cylinder is rotatably supported on the tensioning seat and connected to the driven pulley.

[0019] In one possible implementation, the lead screw drives the syringe piston to move via a piston rod, the piston rod being slidably disposed within the cylinder, one end of the piston rod being connected to the syringe piston via a piston clamp, and the other end being connected to the lead screw, with one end of the lead screw extending into the cavity of the piston rod.

[0020] In one possible implementation, a lead screw guide sleeve is provided at one end of the lead screw that extends into the cavity of the piston rod, and the lead screw guide sleeve slides in engagement with the inner wall of the cavity of the piston rod.

[0021] In one possible implementation, one end of the piston rod has a groove extending axially therein, and a retaining plate is provided on the cylinder, the retaining plate extending into the groove and slidingly engaging with the groove.

[0022] In one possible implementation, the piston plate has a mounting screw portion, and the end of the piston rod has a mounting screw hole, wherein the mounting screw portion is threadedly engaged with the mounting screw hole;

[0023] An adjusting nut is threaded onto the mounting screw section, and the adjusting nut is used to abut against the end of the piston rod.

[0024] In one possible implementation, one end of the syringe is a socket for insertion into the syringe interface, the socket is provided with a plurality of spaced first limiting parts, the syringe interface is provided with second limiting parts corresponding to each of the first limiting parts, and a bypassing part that can avoid each of the first limiting parts.

[0025] In one possible implementation, a switch bracket and a light shield are also included. The switch bracket is disposed on the outside of the syringe body, and a first photoelectric switch and a second photoelectric switch are disposed on the switch bracket to mark the two extreme positions of the syringe piston.

[0026] The light-shielding plate is fixed to the nut or a connector between the nut and the syringe piston. When the light-shielding plate moves to the position of the first photoelectric switch, the first photoelectric switch sends a first limit position stop signal. When the light-shielding plate moves to the position of the second photoelectric switch, the second photoelectric switch sends a second limit position stop signal.

[0027] In one possible implementation, the syringe body is connected to a support device via a rotary damper, such that the angle of the syringe barrel along the axial direction is adjustable, and the support device is used for mounting to a target position.

[0028] The syringe provided in this application incorporates a tensioning device. One end of the tensioning elastic element of this device is connected to a tensioning seat, and the other end is connected to a motor. The tensioning elastic element can drive the driving pulley to move away from the driven pulley, thereby maintaining the tension of the synchronous belt between the driving and driven pulleys. The syringe provided in this application can maintain the tension of the synchronous belt between the driving and driven pulleys, improving the accuracy of syringe transmission and reducing the possibility of large errors caused by insufficient tension or slack in the synchronous belt after prolonged operation. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the syringe structure disclosed in the embodiments of this application;

[0031] Figure 2 This is a front view of the syringe disclosed in an embodiment of this application;

[0032] Figure 3 This is a top view of the syringe disclosed in an embodiment of this application;

[0033] Figure 4 for Figure 2 Sectional view along AA;

[0034] Figure 5 for Figure 2 A cross-sectional view along BB;

[0035] Figure 6 for Figure 5 Sectional view along CC;

[0036] Figure 7 for Figure 6 A magnified view of part A in the image;

[0037] Figure 8 This is a schematic diagram of the syringe structure disclosed in the embodiments of this application;

[0038] Figure 9 This is an exploded view of the syringe and syringe interface disclosed in the embodiments of this application;

[0039] Figure 10 This is an exploded view of the syringe piston and piston plate disclosed in the embodiments of this application.

[0040] The meanings of the various reference numerals in the figure are as follows:

[0041] 101-Syringe; 1011-First limiting part; 102-Syringe piston; 1021-Claw; 103-Syringe interface; 1031-Second limiting part; 1032-Avoiding part; 104-Clamping plate; 105-Piston clamping plate; 1051-Mounting screw part; 1052-Clamping block; 106-Adjusting nut; 107-Lead screw guide sleeve; 108-Lead screw; 109-Piston rod; 110-Cylinder; 111-Front buffer rubber block; 112-Lead nut; 113-Rear buffer rubber block ; 114-Tensioning seat; 115-Bearing; 116-Locking nut; 117-Driven pulley; 118-Synchronous belt; 119-Tensioning elastic element; 120-Drive pulley; 121-Protective housing; 122-Motor bracket; 1221-Strip hole; 123-Motor; 124-Rotation damper; 125-Bracket; 126-Fixed base plate; 127-Switch bracket; 128-First photoelectric switch; 129-Light shield; 130-Second photoelectric switch; 131-Positioning pin. Detailed Implementation

[0042] The core of this application is to provide a syringe that ensures transmission accuracy and reduces errors in the delivery dosage.

[0043] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the application as described in the claims. Additionally, the complete composition represented in the embodiments below is not limited to what is necessary as the solution to the application described in the claims. It should be noted that, for ease of description, only the parts relevant to the application are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0044] like Figures 1-4 As shown in the embodiments of this application, the syringe disclosed includes a syringe body, a syringe driving device, and a tensioning device. The syringe body includes a cylinder 110, one end of which is provided with a syringe 101 or a syringe interface 103 for mounting the syringe 101, and a syringe piston 102 is provided inside the syringe 101.

[0045] The syringe disclosed in this embodiment may include a syringe 101 or may not include a syringe 101, but instead has a syringe port 103 provided at one end of the cylinder 110. When the syringe includes a syringe 101, the syringe 101 may be an integral structure with the cylinder 110 or a detachable structure, so that the syringe 101 can be replaced.

[0046] The syringe 101 is equipped with a syringe piston 102, which moves within the syringe 101 to achieve the absorption and delivery of a drug (which can be a contrast agent, or other drugs, depending on the requirements). One end of the syringe 101 is the drug outlet. When the syringe piston 102 moves away from the drug outlet, the drug is drawn into the lumen of the syringe 101 through the drug outlet; when the syringe piston 102 moves closer to the drug outlet, the drug in the lumen of the syringe 101 is pushed out through the drug outlet.

[0047] like Figure 5 and Figure 6 As shown, the syringe drive device includes a motor 123, a pulley mechanism, and a lead screw mechanism disposed within the cylinder 110. The pulley mechanism includes a driving pulley 120, a driven pulley 117, and a synchronous belt 118. The synchronous belt 118 is used to realize the power transmission between the driving pulley 120 and the driven pulley 117, so as to transmit the power of the driving pulley 120 to the driven pulley 117.

[0048] The lead screw mechanism includes a lead screw 108 and a nut 112 threaded onto the lead screw 108. When the lead screw 108 rotates, the nut 112 can move along the axial direction of the lead screw 108. The direction of movement of the nut 112 is related to the direction of rotation of the lead screw 108. For example, when the lead screw 108 rotates clockwise, the nut 112 moves along the lead screw 108 towards the drug outlet of the syringe 101; when the lead screw 108 rotates counterclockwise, the nut 112 moves along the lead screw 108 away from the drug outlet of the syringe 101.

[0049] The driven pulley 117 of the pulley mechanism is mounted on the lead screw 108 of the lead screw mechanism and can be limited by the locking nut 116 mounted on the lead screw 108. The lead screw nut 112 of the lead screw mechanism is used to drive the movement of the syringe piston 102. The motor 123 is connected to the driving pulley 120 of the pulley mechanism. The motor 123 can be a geared motor, and the driving pulley 120 can be directly fixed to the output shaft of the motor 123, for example, by means of a key connection to achieve torque transmission, so that the motor 123 can drive the driving pulley 120 to rotate, and transmit power to the driven pulley 117 through the synchronous belt 118, so that the driven pulley 117 drives the lead screw 108 to rotate, and finally drives the syringe piston 102 to move through the lead screw nut 112. The direction of movement of the syringe piston 102 can be controlled by different rotation directions output by the motor 123.

[0050] The tensioning device includes a tensioning seat 114 and a tensioning elastic element 119. It should be noted that the tensioning seat 114 is a fixed base component that can be fixed to a fixed part of the syringe, such as the cylinder 110.

[0051] One end of the tensioning elastic element 119 is connected to the tensioning seat 114, and the other end is connected to the motor 123 to drive the driving pulley 120 to move away from the driven pulley 117. The tensioning elastic element 119 has a reset function. Under its elastic force, it can push the motor 123 and the driving pulley 120 connected to the output shaft of the motor to move away from the tensioning seat 114, so that the driving pulley 120 and the driven pulley 117 move away from each other, keeping the synchronous belt 118 in a tensioned state.

[0052] The syringe disclosed in this application includes a tensioning device. One end of the tensioning elastic element 119 of this device is connected to the tensioning seat 114, and the other end is connected to the motor 123. The tensioning elastic element 119 can drive the driving pulley 120 to move away from the driven pulley 117, thereby maintaining the tension of the synchronous belt 118 between the driving pulley 120 and the driven pulley 117. The syringe provided by this application can maintain the tension of the synchronous belt 118 between the driving pulley 120 and the driven pulley 117, improving the accuracy of syringe transmission and reducing the large errors caused by the synchronous belt 118 not being properly tensioned or by the synchronous belt 118 becoming loose after long-term operation.

[0053] like Figure 6 and Figure 7 As shown in a specific embodiment of this application, the motor 123 can be fixed on the motor bracket 122. The tensioning device also includes a positioning pin 131, which is fixed on one of the tensioning seat 114 and the motor bracket 122 and slides with the other. For example, if the positioning pin 131 is fixed on the motor bracket 122, a sliding hole can be opened in the tensioning seat 114. One end of the positioning pin 131 extends into the sliding hole and slides with it. Through the cooperation of the positioning pin 131 and the sliding hole, the guiding effect is achieved to constrain the movement direction of the motor 123 and the drive pulley 120, that is, the movement direction is the axial direction of the positioning pin 131 and the sliding hole.

[0054] The tensioning elastic element 119 is sleeved on the positioning pin 131. The tensioning elastic element 119 can be a tension spring, or other elastic elements. In this embodiment, by sleeved on the positioning pin 131, the tensioning elastic element 119 can be positioned to prevent it from dislodging from the tensioned position and losing its tensioning function.

[0055] One end of the tensioning elastic element 119 abuts against the tensioning seat 114, and the other end abuts against the motor bracket 122. By pushing the motor bracket 122, it achieves the effect of driving the motor 123 and the drive pulley 120. It should be noted that the number of tensioning elastic elements 119 is not limited to one; those skilled in the art can set multiple elements according to their needs.

[0056] like Figure 1As shown in a specific embodiment of this application, the syringe may further include fasteners for fixing the motor bracket 122 to the tensioning seat 114. The fasteners fix the motor bracket 122 to the tensioning seat 114, thereby achieving relative fixation between the motor 123 and the tensioning seat 114. In this embodiment, after the synchronous belt 118 is tensioned by the tensioning elastic member 119, the fasteners can fix the motor bracket 122 to the tensioning seat 114, thereby maintaining the tension of the synchronous belt 118 and preventing the reliability of the syringe from being affected by the motor 123 being in a floating state during use.

[0057] Specifically, the tensioning seat 114 is provided with fastening holes, and the motor bracket 122 is provided with a strip hole 1221 corresponding to the fastening holes. The strip hole 1221 extends along the arrangement direction of the driving pulley 120 and the driven pulley 117, that is, the extension direction of the strip hole 1221 is parallel to the positioning pin 131. The fastener passes through the strip hole 1221 and engages with the fastening hole. After the syringe has been used for a period of time or before use, the fastener can be loosened, so that the motor 123 is in a floating state. After the fastener is loosened, the timing belt 118 will be tensioned by the tensioning elastic element 119. After the timing belt 118 is tensioned, the fastener is tightened again to fix the motor bracket 122 on the tensioning seat 114.

[0058] Since the driving pulley 120, driven pulley 117, and synchronous belt 118 of the pulley mechanism are all located outside the cylinder 110, meaning the pulley mechanism lacks housing protection, it is easily affected by interference from other equipment and operators. Therefore, the syringe disclosed in this embodiment may also include a protective housing 121 fixed to the motor bracket 122 (e.g., Figure 1 As shown, the protective housing 121 covers the outside of the pulley mechanism. The motor bracket 122 can serve as the fixed base for the protective housing 121. The protective housing 121 can be a box structure, fastened to the motor bracket 122, thereby enclosing the driving pulley 120, driven pulley 117, and synchronous belt 118 of the pulley mechanism inside the protective housing 121. Furthermore, the protective housing 121 is fixed to the motor bracket 122. When the fasteners are loosened, causing the motor 123 to float, the motor bracket 122 and the protective housing 121 also float and can be moved by the tensioning elastic element 119 without affecting the tension of the synchronous belt 118.

[0059] like Figure 6As shown, the end of the lead screw 108 extending beyond the cylinder 110 is rotatably supported on the tensioning seat 114 and connected to the driven pulley 117. The tensioning seat 114 is located outside the cylinder 110, and a rear buffer rubber block 113 can be fixed to one end of the tensioning seat 114. The rear buffer rubber block 113 can be fixed to the tensioning seat 114 by screws and is embedded inside the cylinder 110. The rear buffer rubber block 113 can limit the extreme position of the nut 112. That is, when the syringe 101 draws in the medicine, the syringe piston 102 and the nut 112 will move towards the rear buffer rubber block 113 until the nut 112 abuts against the rear buffer rubber block 113. The rear buffer rubber block 113 is made of soft material, which can prevent the nut 112 from colliding hard with other parts and damaging the thread. The tensioning seat 114 and the lead screw 108 are supported by the bearing 115. The rear buffer rubber block 113 is clearance-fitted with the lead screw 108 to prevent friction between the lead screw 108 and the rear buffer rubber block 113.

[0060] In one specific embodiment of this application, the nut 112 drives the syringe piston 102 to move via the piston rod 109, which is slidably disposed within the cylinder 110. One end of the piston rod 109 is connected to the syringe piston 102 via a piston clamp 105. It should be noted that the end of the piston rod 109 with the piston clamp 105 can extend into the syringe 101, so as to push the syringe piston 102 to the extreme position at the end where the medicine outlet of the syringe 101 is located.

[0061] The other end of the piston rod 109 is connected to the nut 112, and one end of the lead screw 108 extends into the cavity of the piston rod 109. The nut 112 can be fixed to the piston rod 109 with screws to keep the nut 112 and the piston rod 109 moving synchronously.

[0062] A front buffer rubber block 111 can be installed on the piston rod 109. When the syringe 101 pushes the medicine, the syringe piston 102 and the lead screw nut 112 will move towards the end where the medicine outlet of the syringe 101 is located until the front buffer rubber block 111 abuts against the corresponding limiting structure of the cylinder 110. The front buffer rubber block 111 is made of soft material, which can prevent damage to the threads of the lead screw nut 112 and the lead screw 108 due to hard impact.

[0063] Furthermore, a lead screw guide sleeve 107 is provided at one end of the lead screw 108 that extends into the cavity of the piston rod 109, and the lead screw guide sleeve 107 slides in engagement with the inner wall of the cavity of the piston rod 109. That is, the end of the lead screw 108 located in the cavity of the piston rod 109 is supported by the lead screw guide sleeve 107, and the end located outside the cylinder 110 is supported by the bearing 115.

[0064] In one specific embodiment of this application, one end of the piston rod 109 has a groove extending axially therefrom. A retaining plate 104 is provided on the cylinder 110. The retaining plate 104 extends into the cavity of the cylinder 110 and into the groove, slidingly engaging with the groove. Through the engagement of the groove and the retaining plate 104, the rotation of the piston rod 109 and the nut 112 can be restricted, so that the piston rod 109 and the nut 112 can only move in a straight line, avoiding rotation with the lead screw 108.

[0065] like Figure 6 and Figure 10 As shown in a specific embodiment of this application, the piston plate 105 has a mounting screw portion 1051, and the end of the piston rod 109 has a mounting screw hole. The mounting screw portion 1051 is threadedly engaged with the mounting screw hole to realize the connection between the piston plate 105 and the piston rod 109.

[0066] An adjusting nut 106 is threaded onto the mounting screw portion 1051, and the adjusting nut 106 is used to abut against the end of the piston rod 109. The piston retaining plate 105 has a retaining block 1052 at the end away from the mounting screw portion 1051. The syringe piston 102 has a retaining claw 1021 on the side facing the piston retaining plate 105, and a retaining groove is formed on the retaining claw 1021. The retaining block 1052 is used to engage with the retaining groove, thereby connecting the piston retaining plate 105 and the syringe piston 102. There are two retaining claws 1021, which are symmetrical along the axis of the syringe piston 102; both ends of the retaining block 1052 are used to engage with the retaining grooves on the two retaining claws 1021.

[0067] When installing the syringe 101, the two ends of the locking block 1052 must be staggered from the two locking claws 1021 so that when the piston locking plate 105 is inserted into the syringe piston 102, the locking block 1052 will not be blocked by the side wall of the locking groove (i.e., the solid part of the locking claws 1021). Finally, by rotating the syringe 101, the syringe piston 102 is driven to rotate, causing the locking block 1052 to rotate relative to the locking groove, thereby allowing the locking block 1052 to rotate from the side into the locking groove, completing the connection between the piston locking plate 105 and the syringe piston 102.

[0068] Based on the above description, when installing the syringe 101, it is necessary to ensure that the portion between the two jaws 1021 corresponds to the end of the locking block 1052. This requires adjusting the rotation angle of the piston locking plate 105 when installing the piston locking plate 105, so that the locking block 1052 is held at an angle corresponding to the portion between the two jaws 1021. The position of the adjusting nut 106 on the mounting screw part 1051 ensures that when the mounting screw part 1051 is threadedly engaged with the mounting screw hole until the adjusting nut 106 abuts against the end of the piston rod 109, the position of the locking block 1052 is precisely maintained corresponding to the portion between the two locking slots.

[0069] like Figure 8 and Figure 9 As shown, one end of the syringe 101 is a port for insertion into the syringe interface 103, and the port is provided with a plurality of spaced first limiting parts 1011 ( Figure 8 In the illustrated scheme, there are two first limiting parts 1011. The syringe interface 103 is provided with second limiting parts 1031 corresponding to each of the first limiting parts 1011, and avoidance parts 1032 that can avoid each of the first limiting parts 1011. When installing the syringe 101, the first limiting parts 1011 must be aligned with the avoidance parts 1032. Then, the syringe 101 is inserted into the syringe interface 103, and the syringe 101 is rotated so that the first limiting parts 1011 rotate to the rear of the second limiting parts 1031. The second limiting parts 1031 restrict the first limiting parts 1011 from moving away from the syringe interface 103, thereby achieving the installation of the syringe 101. A limiting screw can be provided on the syringe interface 103 to limit the extreme position of the rotation of the first limiting parts 1011. When the syringe 101 is rotated, it can no longer be rotated when the first limiting part 1011 abuts against the limiting screw, indicating that the syringe 101 has been installed in place. Normally, the limiting screw can be tightened onto the second limiting part 1031, and a limiting groove is formed on the rear side of the second limiting part 1031 to accommodate the first limiting part 1011.

[0070] like Figure 4 As shown in a specific embodiment of this application, the syringe may further include a switch bracket 127 and a light shield 129. The switch bracket 127 is disposed on the outside of the syringe body, and a first photoelectric switch 128 and a second photoelectric switch 130 are disposed on the switch bracket 127 to calibrate the two extreme positions of the syringe piston 102.

[0071] The light-shielding plate 129 is fixed to the nut 112 or to a connector (such as piston rod 109) connecting the nut 112 and the syringe piston 102, so that the light-shielding plate 129 can move together with the nut 112.

[0072] When the light-shielding plate 129 moves to the position of the first photoelectric switch 128, the first photoelectric switch 128 sends a first limit position stop signal. When the light-shielding plate 129 moves to the position of the second photoelectric switch 130, the second photoelectric switch 130 sends a second limit position stop signal.

[0073] When the syringe piston 102 moves to the end where the medicine outlet of the syringe 101 is located, it means that all the medicine in the syringe 101 has been ejected. At this time, the piston rod 109 is fully extended, and the light shield 129 moves to the position of the first photoelectric switch 128. The first photoelectric switch 128 sends a first limit position stop signal.

[0074] When the syringe piston 102 moves to the end of the syringe 101 away from the drug outlet, it means that the syringe 101 is completely filled with drug. At this time, the piston rod 109 retracts completely, and the light shield 129 moves to the position of the second photoelectric switch 130. The second photoelectric switch 130 sends a second limit position stop signal.

[0075] like Figure 1 , Figure 2 and Figure 5 As shown in a specific embodiment of this application, the syringe body is connected to the support device via a rotary damper 124, so that the angle of the syringe 101 along the axial direction is adjustable. The support device is used to install it at the target position. The support device may include a fixed base plate 126 and a bracket 125 disposed on the fixed base plate 126, and the rotary damper 124 is disposed on the bracket 125.

[0076] The fixed base plate 126 can be installed on the required equipment table, so that the syringe can be adjusted and stopped at any angle by means of the rotating damper 124. When it is necessary to add medicine into the syringe 101 and expel air from the syringe 101, the medicine outlet of the syringe 101 can be adjusted to an upward tilt to facilitate the medicine addition process and reduce the possibility of air mixed into the medicine.

[0077] After the medication in the syringe has been dispensed, when it is time to push the medication, the medication outlet of the syringe 101 can be adjusted to a downward tilt angle. In this state, even if there are some air bubbles in the syringe 101, gravity will keep the air bubbles at the top of the syringe 101 as much as possible, preventing them from being injected into the fluid tubing and reducing the risk of air bubbles entering the patient's body.

[0078] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0079] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0080] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0081] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A syringe, characterized in that, include: The syringe body includes a cylinder (110), one end of which is provided with a syringe (101) or a syringe interface (103) for installing the syringe (101), and a syringe piston (102) is provided inside the syringe (101). The syringe driving device includes a motor (123), a pulley mechanism and a lead screw mechanism disposed in the cylinder (110). The driven pulley (117) of the pulley mechanism is disposed on the lead screw (108) of the lead screw mechanism. The lead screw nut (112) of the lead screw mechanism is used to drive the syringe piston (102) to move. The motor (123) is connected to the driving pulley (120) of the pulley mechanism. The tensioning device includes a tensioning seat (114) and a tensioning elastic element (119). One end of the tensioning elastic element (119) is connected to the tensioning seat (114), and the other end is connected to the motor (123) to drive the driving pulley (120) to move away from the driven pulley (117).

2. The syringe as described in claim 1, characterized in that, The motor (123) is fixed on the motor bracket (122), and the tensioning device further includes a positioning pin (131), which is fixed on one of the tensioning seat (114) and the motor bracket (122) and slides with the other. The tensioning elastic element (119) is sleeved on the positioning pin (131), with one end abutting against the tensioning seat (114) and the other end abutting against the motor bracket (122).

3. The syringe as described in claim 2, characterized in that, It also includes fasteners for securing the motor bracket (122) to the tensioner (114); The tensioning seat (114) is provided with a fastening hole, and the motor bracket (122) is provided with a strip hole (1221) corresponding to the fastening hole. The strip hole (1221) extends along the arrangement direction of the driving pulley (120) and the driven pulley (117). The fastener passes through the strip hole (1221) and cooperates with the fastening hole.

4. The syringe as described in claim 2, characterized in that, It also includes a protective housing (121) fixed to the motor bracket (122), the protective housing (121) covering the outside of the pulley mechanism.

5. The syringe as claimed in claim 1, characterized in that, One end of the cylinder (110) is provided with the syringe interface (103), and the syringe (101) is detachably connected to the syringe interface (103). The end of the lead screw (108) extending beyond the cylinder (110) is rotatably supported on the tensioning seat (114) and connected to the driven pulley (117).

6. The syringe as described in claim 5, characterized in that, The nut (112) drives the syringe piston (102) to move via the piston rod (109). The piston rod (109) is slidably disposed in the cylinder (110). One end of the piston rod (109) is connected to the syringe piston (102) via the piston clamp (105), and the other end is connected to the nut (112). One end of the lead screw (108) extends into the cavity of the piston rod (109).

7. The syringe as claimed in claim 6, characterized in that, The lead screw (108) is provided with a lead screw guide sleeve (107) at one end that extends into the cavity of the piston rod (109), and the lead screw guide sleeve (107) slides in cooperation with the inner wall of the cavity of the piston rod (109).

8. The syringe as claimed in claim 6, characterized in that, One end of the piston rod (109) has a groove extending along its axial direction, and a retaining plate (104) is provided on the cylinder (110), the retaining plate (104) extending into the groove and slidingly engaging with the groove.

9. The syringe as claimed in claim 6, characterized in that, The piston plate (105) has a mounting screw portion (1051), and the end of the piston rod (109) has a mounting screw hole, wherein the mounting screw portion (1051) is threadedly engaged with the mounting screw hole; An adjusting nut (106) is threaded onto the mounting screw part (1051), and the adjusting nut (106) is used to abut against the end of the piston rod (109).

10. The syringe as claimed in claim 5, characterized in that, One end of the syringe (101) is a socket for insertion into the syringe interface (103). The socket is provided with a plurality of spaced first limiting parts (1011). The syringe interface (103) is provided with second limiting parts (1031) corresponding to each of the first limiting parts (1011) and avoidance parts (1032) that can avoid each of the first limiting parts (1011).

11. The syringe according to any one of claims 1-10, characterized in that, It also includes a switch bracket (127) and a light shield (129). The switch bracket (127) is located on the outside of the syringe body. The switch bracket (127) is provided with a first photoelectric switch (128) and a second photoelectric switch (130) that mark the two extreme positions of the syringe piston (102). The light-shielding plate (129) is fixed to the nut (112) or connected to the connector between the nut (112) and the syringe piston (102). When the light-shielding plate (129) moves to the position of the first photoelectric switch (128), the first photoelectric switch (128) sends a first limit position stop signal. When the light-shielding plate (129) moves to the position of the second photoelectric switch (130), the second photoelectric switch (130) sends a second limit position stop signal.

12. The syringe according to any one of claims 1-10, characterized in that, The syringe body is connected to a support device via a rotary damper (124) so ​​that the angle of the syringe (101) is adjustable in the axial direction. The support device is used to mount the syringe to the target position.

Images