High-pressure injector handpiece and high-pressure injector

Abstract

The present invention discloses a high-pressure injector head and a high-pressure injector, wherein the high-pressure injector head comprises: a bracket; a push rod assembly; the push rod assembly is mounted on the bracket; and a driving mechanism, the driving mechanism is mounted on the bracket, the driving structure comprises a sliding transmission shaft, and a first driving assembly and a second driving assembly connecting the sliding transmission shaft and the push rod assembly, the first driving assembly drives the push rod assembly and the sliding transmission shaft to rotate, and the second driving assembly drives the push rod assembly to slide along the sliding transmission shaft. The technical solution of the present invention can simplify the installation operation requirements and improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a high-pressure injector head and a high-pressure injector using the high-pressure injector head. Background Art

[0002] The high-pressure injector in the related art is mainly used for contrast agent injection during angiography, and can also be used for contrast agent injection during CT angiography. The function of the high-pressure injector is to ensure that a sufficient amount of high-concentration X-ray contrast agent is quickly injected into the patient's part to be examined within a certain period of time. At present, the push rod assembly in the high-pressure injector needs to connect the rod body and the piston by rotation, and also needs to drive the piston to reciprocate by sliding. Therefore, the installation accuracy of the drive mechanism is very high, resulting in low production efficiency.

[0003] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a high-pressure injector head, aiming to simplify installation requirements and improve production efficiency.

[0005] To achieve the above object, the high-pressure injector head proposed by the present invention comprises:

[0006] Bracket;

[0007] A push rod assembly; the push rod assembly is mounted on the bracket; and

[0008] A driving mechanism is installed on the bracket, and the driving structure includes a sliding transmission shaft, and a first driving assembly and a second driving assembly connecting the sliding transmission shaft and the push rod assembly, the first driving assembly drives the push rod assembly and the sliding transmission shaft to rotate, and the second driving assembly drives the push rod assembly to slide along the sliding transmission shaft.

[0009] Optionally, the push rod assembly comprises:

[0010] A rod body, wherein the second driving assembly is connected to the rod body to drive the rod body to slide along the sliding transmission shaft;

[0011] A shaft core, the shaft core is arranged in the rod body, and the first driving assembly is connected to the shaft core to drive the shaft core to rotate;

[0012] A clamping assembly, which is disposed at one end of the rod body and is drivingly connected to the shaft core; and

[0013] A piston is connected to the clamping assembly.

[0014] Optionally, the first drive assembly includes a first drive member, a synchronous wheel assembly connecting the first drive member and the sliding transmission shaft, and a gear assembly connecting the sliding transmission shaft and the shaft core, and the first drive member drives the sliding transmission shaft to rotate and drives the shaft core to rotate.

[0015] Optionally, the second driving assembly includes a second driving member, a screw assembly connected to the second driving member, and a connecting plate connected to the screw assembly, wherein the connecting plate connects the rod body and the sliding transmission shaft and can drive the rod body to slide along the sliding transmission shaft.

[0016] Optionally, the connecting plate is provided with an axial hole, and the sliding transmission shaft is passed through the axial hole, so that the connecting plate moves along the extension direction of the sliding transmission shaft.

[0017] Optionally, the high-pressure injector head further comprises a guide shaft mounted on the bracket, the guide shaft passes through the connecting plate, and an extension direction of the guide shaft is the same as an extension direction of the sliding transmission shaft to guide the connecting plate to slide.

[0018] Optionally, the clamping assembly includes two clamping blocks, which are transmission-connected to the shaft core, and a slideway is formed on the end surface of one end of the rod body. The two clamping blocks are arranged in the slideway, and the two clamping blocks move toward each other to clamp and fix the piston.

[0019] Optionally, the push rod assembly also includes a groove wheel and two driving pins, the groove wheel is arranged in the rod body, the groove wheel is connected to the shaft core, the groove wheel is provided with two transfer grooves, the two transfer grooves are arranged along the circumference of the groove wheel and extend outward along the radial direction of the groove wheel, and a clearance opening is provided at the bottom of the slideway, one end of each driving pin is inserted in one of the transfer grooves, and the other end passes through the clearance opening and is fixedly connected to one of the clamping blocks, and the groove wheel rotates to drive the clamping block to move.

[0020] Optionally, the piston comprises a connecting end surface and a connecting column protruding from the connecting end surface, the connecting end surface is abutted against the end surface of the rod body, and the connecting column is clamped between the two clamping blocks.

[0021] The present invention further provides a high-pressure injector, comprising an injector body and a high-pressure injector head, wherein the high-pressure injector head is any one of the high-pressure injector heads described above.

[0022] The technical solution of the present invention adopts the method of installing the driving mechanism and the push rod assembly on the bracket and setting a sliding transmission shaft in the driving mechanism, so that the first driving assembly in the driving mechanism drives the sliding transmission shaft and the push rod assembly to rotate, and the second driving assembly in the driving mechanism drives the push rod assembly to slide along the sliding transmission shaft. In this structural method, the sliding transmission shaft can ensure both the rotation and sliding of the push rod assembly, and there is no need to set up additional complex driving structures and high-precision requirements, which simplifies the installation operation requirements and greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of an embodiment of a high-pressure injector head of the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the explosion structure;

[0026] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0027] Figure 4 It is a schematic diagram of the exploded structure of a part of the push rod assembly of the present invention;

[0028] Figure 5 It is a schematic diagram of the exploded structure of another part of the push rod assembly of the present invention;

[0029] Figure 6 It is a cross-sectional schematic diagram of an embodiment of a push rod assembly of the present invention.

[0030] Description of Figure Numbers:

[0031]

[0032]

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is that it includes three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The invention provides a high-pressure injector head.

[0039] Combined with reference Figures 1 to 3 In an embodiment of the present invention, the high-pressure injector head comprises:

[0040] Bracket 100;

[0041] A push rod assembly 200; the push rod assembly 200 is installed on the bracket 100; and

[0042] The driving mechanism 300 is installed on the bracket 100, and the driving structure includes a sliding transmission shaft 330, and a first driving assembly 310 and a second driving assembly 320 connecting the sliding transmission shaft 330 and the push rod assembly 200. The first driving assembly 310 drives the push rod assembly 200 and the sliding transmission shaft 330 to rotate, and the second driving assembly 320 drives the push rod assembly 200 to slide along the sliding transmission shaft 330.

[0043] In the present application, the bracket 100 is in a cubic shape to facilitate demolding and manufacturing; the bracket 100 can be made of plastic material, which is easily available and light, and can save production material costs. In one embodiment, a syringe mounting position 110 is formed in a recessed manner on one end surface of the bracket 100, and the injection syringe is mounted on the mounting position 110, and the push rod assembly 200 is inserted into the injection syringe, so that the push rod assembly 200 reciprocates to quickly inject the liquid medicine (such as contrast agent) into the patient's part to be examined.

[0044] In actual applications, the push rod assembly 200 is first driven to rotate by the sliding transmission shaft 330, and after being assembled and connected through rotation, it is connected and fixed with the injection syringe. Then, the push rod assembly 200 can be guided by the sliding transmission shaft 330 to reciprocate along the extension direction of the sliding transmission shaft 330, thereby pushing the liquid medicine in the injection syringe into the patient's part to be examined, thereby completing the entire high-pressure injection process.

[0045] It should be noted that the high-pressure injector head of the present application can be either single-barrel injection, that is, connected to one injection syringe for drug injection, or double-barrel injection, that is, connected to two injection syringes for drug injection. The present application does not make specific limitations on this.

[0046] The technical solution of the present invention adopts the method of installing the driving mechanism 300 and the push rod assembly 200 on the bracket 100, and setting the sliding transmission shaft 330 in the driving mechanism 300, so that the first driving assembly 310 in the driving mechanism 300 drives the sliding transmission shaft 330 and the push rod assembly 200 to rotate, and the second driving assembly 320 in the driving mechanism 300 drives the push rod assembly 200 to slide along the sliding transmission shaft 330. In this structural method, the sliding transmission shaft 330 can ensure both the rotation and the sliding of the push rod assembly 200, and there is no need to set up additional complex driving structures and high-precision requirements, which simplifies the installation operation requirements and greatly improves production efficiency.

[0047] Please refer to Figures 4 to 6In one embodiment of the present application, the push rod assembly 200 includes a rod body 210, a shaft core 230, a clamping assembly and a piston 240. The second driving assembly 320 is connected to the rod body 210 to drive the rod body 210 to slide along the sliding transmission shaft 330; the shaft core 230 is disposed in the rod body 210, and the first driving assembly 310 is connected to the shaft core 230 to drive the shaft core 230 to rotate; the clamping assembly is disposed at one end of the rod body 210 and is transmission-connected to the shaft core 230; the piston 240 is connected to the clamping assembly.

[0048] In this embodiment, the rod body 210 is a hollow cylindrical structure, and the shaft core 230 is accommodated in the hollow part of the rod body 210, so that the first driving assembly 310 drives the sliding transmission shaft 330 to rotate, thereby driving the shaft core 230 to rotate in the rod body 210, so that the rotating shaft core 230 drives the clamping assembly to move, and then the clamping assembly clamps and fixes the piston 240, completing the assembly and connection process of the push rod assembly 200; and the second driving assembly 320 drives the rod body 210 to move linearly, thereby driving the push rod assembly 200 to reciprocate along the axial direction of the sliding transmission shaft 330 as a whole, completing the injection process of the liquid medicine in the injection syringe. Therefore, the sliding transmission shaft 330 completes the rotation process and the pushing process of the push rod assembly 200, reduces the installation accuracy requirements of the driving mechanism 300, simplifies the installation operation process, and improves production efficiency.

[0049] In this application, reference is made to Figure 1 and Figure 2 The first driving assembly 310 includes a first driving member 311, a synchronous wheel assembly 312 connecting the first driving member 311 and the sliding transmission shaft 330, and a gear assembly 313 connecting the sliding transmission shaft 330 and the shaft core 230. The first driving member 311 drives the sliding transmission shaft 330 to rotate and drives the shaft core 230 to rotate. Specifically, the first driving member 311 can be a driving motor, the synchronous wheel assembly 312 includes a driving wheel, a driven wheel and a belt matched with the driving wheel and the driven wheel, and the gear assembly 313 includes a driving gear installed on the sliding transmission shaft 330 and a driven gear installed on the shaft core 230, wherein the driving gear is meshed with the driven gear. In actual applications, the first driving member 311 drives the synchronous wheel assembly 312 to rotate and drives the sliding transmission shaft 330 to rotate. The rotation of the sliding transmission shaft 330 drives the gear assembly 313 to rotate and then drives the shaft core 230 to rotate. In this installation method, the structure is relatively simple and the precision requirement is relatively low, which can simplify the operation process and improve production efficiency.

[0050] In one embodiment, the second driving assembly 320 includes a second driving member 321, a screw assembly 322 connected to the second driving member 321, and a connecting plate 323 connected to the screw assembly 322. The connecting plate 323 connects the rod body 210 and the sliding transmission shaft 330, and can drive the rod body 210 to slide along the sliding transmission shaft 330. The second driving member 321 may be a driving motor, and the screw assembly 322 is connected to the output end of the driving motor, so that the rotational power of the second driving member 321 is converted into linear motion through the screw assembly 322, and then the rod body 210 is pushed by the connecting plate 323 to move linearly along the sliding transmission shaft 330 connected to the connecting plate 323. The connecting plate 323 may be a square plate, and the end surface of the end of the rod body 210 away from the piston 240 abuts against one side of the connecting plate 323. The connecting plate 323 and the sliding transmission shaft 330 are movably connected. For example, the sliding transmission shaft 330 may be embedded in the edge of the connecting plate 323, so that the sliding transmission shaft 330 can rotate at the edge of the connecting plate 323, and then the connecting plate 323 can reciprocate along the sliding transmission shaft 330. In this installation method, the rod body 210 is guided to reciprocate by the sliding transmission shaft 330 that transmits the rotation, so as to complete the injection, simplify the operation process, and improve the production efficiency.

[0051] In one embodiment of the present application, the connecting plate 323 is provided with an axial hole (not shown), and the sliding transmission shaft 330 is passed through the axial hole, so that the connecting plate 323 moves along the extension direction of the sliding transmission shaft 330. That is, the sliding transmission shaft 330 is passed through the connecting plate 323, and by providing the axial hole, the connecting plate 323 can be corrected when moving along the sliding transmission shaft 330, ensuring that the push rod assembly 200 will not be skewed or deviated during the reciprocating motion.

[0052] In one embodiment of the present application, refer to Figure 1 The high-pressure injector head also includes a guide shaft 400 mounted on the bracket 100, the guide shaft 400 is inserted through the connecting plate 323, and the extending direction of the guide shaft 400 is the same as the extending direction of the sliding transmission shaft 330, so as to guide the connecting plate 323 to slide. In this embodiment, the guide shaft 400 is parallel to the sliding transmission shaft 330, and the guide shaft 400 is located at a corner of the connecting plate 323. In this arrangement, when the connecting plate 323 drives the push rod assembly 200 to reciprocate, it can be guided by the guide shaft 400, further ensuring that the push rod assembly 200 remains stable during movement without skewing or deviation.

[0053] Please refer to Figure 5 and Figure 6In an embodiment of the present application, the clamping assembly includes two clamping blocks 220, which are transmission-connected to the shaft core 230, and a slideway 211 is formed on the end surface of one end of the rod body 210. The two clamping blocks 220 are arranged in the slideway 211, and the two clamping blocks 220 move toward each other to clamp and fix the piston 240. That is, the rotation of the shaft core 230 is converted into the sliding of the clamping block 220, so that the piston 240 is clamped and fixed. This installation method converts the rotational power of the shaft core 230 into the sliding power of the two clamping blocks 220 to clamp the piston 240, so that the two clamping blocks 220 can move towards each other to tighten the piston 240. In this way, the clamping force provided by the two clamping blocks 220 can be applied to multiple directions of the piston 240, increasing the force-bearing area of ​​the piston 240, so that the piston 240 will not be skewed or deviated when it is pushed into the injection syringe, ensuring that no gap will be generated between the piston 240 and the inner wall of the injection syringe, thereby preventing the possibility of leakage.

[0054] For further information, please refer to Figure 4 In one embodiment of the present application, a limit groove (not shown) extending laterally is provided at the bottom of the slideway, and a limit portion extending laterally is provided at the bottom of the two clamping blocks, and the limit portion is embedded in the limit groove and can slide in the limit groove. In this embodiment, the longitudinal cross-section of the slideway is formed into a "T" shape. During the sliding process of the clamping block, the limit portion slides in the limit groove, and at the same time, the side wall of the clamping block fits against the side wall of the slideway and slides. In this way, the contact area between the clamping block and the slideway during the sliding process is increased, and the limit portion is stopped and limited in the limit groove, thereby effectively preventing the clamping block from loosening during the sliding process of the slideway, and thus being more stable and secure when clamping the piston.

[0055] In the present application, the push rod assembly 200 also includes a groove wheel 250 and two driving pins 260. The groove wheel 250 is arranged in the rod body 210, and the groove wheel 250 is connected to the shaft core 230. The groove wheel 250 is provided with two transfer grooves 251. The two transfer grooves 251 are arranged along the circumference of the groove wheel 250 and extend outward along the radial direction of the groove wheel 250. A clearance opening 212 is provided at the bottom of the slideway 211. One end of each of the driving pins 260 is inserted into one of the transfer grooves 251, and the other end passes through the clearance opening 212 and is fixedly connected to one of the clamping blocks 220. The groove wheel 250 rotates to drive the clamping block 220 to move.

[0056] In the embodiment of the present invention, the rotation of the shaft core 230 drives the groove wheel 250 to rotate as well. The rotational power is converted into linear motion through the transfer groove 251 of the groove wheel 250. Therefore, through the clearance opening 212 at the bottom of the slideway 211, the drive pin 260 can pass through the clearance opening 212 to connect the fixed groove wheel 250 and the clamping block 220. Since the two transfer grooves 251 are arranged along the circumference of the groove wheel 250 and extend outward along the radial direction of the groove wheel 250, when the groove wheel 250 rotates, the drive pin 260 rotates along the extension direction of the transfer groove 251, and the clamping block connected to the drive pin 260 can slide in the slideway 211 under the drive of the drive pin 260. It can be understood that the forward and reverse rotation of the groove wheel 250 can drive the two clamping blocks to move closer to and away from each other. In this way, the installation and disassembly of the piston 240 can be completed, the operation is simple and convenient, and the installation is stable and reliable.

[0057] For further information, please refer to Figure 4 The piston 240 of the present application includes a connecting end face 241 and a connecting column 242 protruding from the connecting end face 241, wherein the connecting end face 241 is abutted against the end face of the rod body 210, and the connecting column 242 is clamped between the two clamping blocks 220. By setting the connecting column 242 to be clamped between the clamping blocks 220, the effective area of ​​the clamping blocks 220 clamping the piston 240 can be increased, so that the piston 240 is more stable after installation and will not shake during the liquid injection process; and by abutting the connecting end face 241 against the end face of the rod body 210, the contact area between the piston 240 and the rod body 210 is increased, so that the piston 240 will not be skewed when moving in the injection syringe, thereby avoiding the phenomenon of liquid leakage.

[0058] The present invention also proposes a high-pressure injector, which includes a syringe body (not shown) and a high-pressure injector head, wherein the syringe body is connected to one side of the high-pressure injector head. The specific structure of the high-pressure injector head refers to the above-mentioned embodiment. Since the high-pressure injector adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0059] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-pressure injector head, characterized in that: include: Bracket; Push rod assembly; The push rod assembly is mounted on the bracket; and A driving mechanism, the driving mechanism is installed on the bracket, the driving mechanism includes a sliding transmission shaft, and a first driving assembly and a second driving assembly connected to the sliding transmission shaft and the push rod assembly, the first driving assembly drives the push rod assembly and the sliding transmission shaft to rotate, and the second driving assembly drives the push rod assembly to slide along the sliding transmission shaft; The push rod assembly comprises: A rod body, wherein the second driving assembly is connected to the rod body to drive the rod body to slide along the sliding transmission shaft; A shaft core, the shaft core is arranged in the rod body, and the first driving assembly is connected to the shaft core to drive the shaft core to rotate; A clamping assembly, which is disposed at one end of the rod body and is drivingly connected to the shaft core; and a piston connected to the clamping assembly; The first driving assembly includes a first driving member, a synchronous wheel assembly connecting the first driving member and the sliding transmission shaft, and a gear assembly connecting the sliding transmission shaft and the shaft core, and the first driving member drives the sliding transmission shaft to rotate and drives the shaft core to rotate; The second driving assembly includes a second driving member, a screw assembly connected to the second driving member, and a connecting plate connected to the screw assembly. The connecting plate connects the rod body and the sliding transmission shaft and can drive the rod body to slide along the sliding transmission shaft.

2. The high-pressure injector head according to claim 1, characterized in that: The connecting plate is provided with an axial hole, and the sliding transmission shaft is passed through the axial hole, so that the connecting plate moves along the extending direction of the sliding transmission shaft.

3. The high-pressure injector head according to claim 1, characterized in that: The high-pressure injector head also includes a guide shaft installed on the bracket, the guide shaft passes through the connecting plate, and the extending direction of the guide shaft is the same as the extending direction of the sliding transmission shaft to guide the connecting plate to slide.

4. A high-pressure injector head according to any one of claims 1 to 3, characterized in that: The clamping assembly includes two clamping blocks, which are transmission-connected to the shaft core. A slideway is formed on the end surface of one end of the rod body. The two clamping blocks are arranged in the slideway. The two clamping blocks move toward each other to clamp and fix the piston.

5. The high-pressure injector head according to claim 4, characterized in that: The push rod assembly also includes a groove wheel and two driving pins. The groove wheel is arranged in the rod body, and the groove wheel is connected to the shaft core. The groove wheel is provided with two transfer grooves. The two transfer grooves are arranged along the circumference of the groove wheel and extend outward along the radial direction of the groove wheel. A clearance opening is provided at the bottom of the slideway. One end of each driving pin is inserted into one of the transfer grooves, and the other end passes through the clearance opening and is fixedly connected to one of the clamping blocks. The groove wheel rotates to drive the clamping block to move.

6. The high-pressure injector head according to claim 4, characterized in that: The piston comprises a connecting end surface and a connecting column protruding from the connecting end surface, the connecting end surface is abutted against the end surface of the rod body, and the connecting column is clamped between the two clamping blocks.

7. A high-pressure injector, characterized in that: It comprises a syringe body and a high-pressure syringe head, and the high-pressure syringe head is the high-pressure syringe head according to any one of claims 1 to 6.

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