Guide structure for drawing and core pulling of medical catheter
By designing a guide structure including a guide structure, an anti-retraction mechanism and a retarding mechanism in the medical catheter core extraction injection mold, the complex problem of the existing core extraction device being rolled back and processed during the injection molding process is solved, a more stable and complete core extraction process is achieved, and the service life of the device is extended.
Patent Information
- Application Number
- CN202421810645.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In the existing core extraction device, in the medical catheter elongated core extraction injection mold, the general-purpose slide causes the mold to have a larger appearance size and complex processing, and it is easy to cause a fallback during the injection molding process.
A guide structure including a base, a guide block, a guide rail, a support plate, a hydraulic cylinder, a moving block, a syringe core, an anti-return mechanism and a retarding mechanism are designed. The moving block and the syringe tube core are driven by the hydraulic cylinder to move, and the anti-retraction mechanism and the retarding mechanism prevent the retraction and slow down the movement speed of the insertion rod respectively, ensuring the stability and integrity of the core extraction process.
It effectively prevents the occurrence of backlash during injection molding, improves the integrity of the core extraction, and reduces the impact force through the retarding mechanism, extends the service life of the device.
Smart Images
Figure CN222844660U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of injection molds, in particular to a guide structure for pulling out the core of a medical catheter. Background Art
[0002] Medical catheter is a kind of medical material, which needs to go through core pulling during the injection molding process. With the trend of complex modern injection molding products, the complexity of injection mold structure is getting higher and higher. At present, most of the slideways in injection molds are universal T-slot slideways, dovetail groove slideways, etc., driven by oil cylinders, air cylinders, inclined guide columns, inclined pull blocks, etc.
[0003] The core-pulling devices currently on the market have long slideways and high guiding precision for slender core-pulling injection molds such as medical catheters. Universal slideways often make the mold dimensions larger, the processing more complicated, the mold is not easy to maintain during use, and it is easy to retreat during the injection molding process. Utility Model Content
[0004] The utility model aims to provide a guiding structure for pulling out the core of a medical catheter, thereby solving the existing problems.
[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:
[0006] The utility model discloses a guide structure for pulling out a medical catheter core, comprising a base, a guide block is fixedly connected to the top of the base, a guide rail is fixedly connected to the top of the guide block, a support plate is fixedly connected to the top of the guide block, a hydraulic cylinder is arranged on the side of the support plate, a moving block is fixedly connected to the output end of the hydraulic cylinder, an end of the moving block away from the hydraulic cylinder is fixedly connected to an injection tube core, a track groove is arranged at the bottom of the moving block, and an anti-retraction mechanism and a deceleration mechanism are arranged at the rear end of the base; the anti-retraction mechanism comprises a slot, a plug rod and a groove, the slot is arranged at the rear end of the moving block, the plug rod penetrates and is slidably connected to the rear end of the support plate, the rear end of the plug rod is fixedly connected to the moving plate, a compression spring is sleeved on the surface of the plug rod, a card slot is arranged on the side of the plug rod, the groove is arranged in the interior of the support plate, a reset spring is arranged in the interior of the groove, a card block is slidably connected to the interior of the groove through the reset spring, and a pull rod is fixedly connected to the end of the card block close to the reset spring.
[0007] Furthermore, the moving block is slidably connected to the guide rail through the bottom track groove, and the pull rod penetrates and is slidably connected to the support plate. When the moving block moves, it moves along the guide rail, making the movement more stable, and pulling the pull rod can drive the card block to leave the card slot.
[0008] Furthermore, the size of one end of the insertion rod away from the movable plate is equal to the size of the slot, and the compression spring is in a stretched state in the initial state. When the compression spring rebounds, it drives the insertion rod to move toward the front end, and the insertion rod can be inserted into the slot.
[0009] Furthermore, in the initial state, two-thirds of the block is located in the slot, the depth of the slot is greater than the length of the block, the block is stuck in the slot so that the insertion rod cannot move to the front end, and the block can be completely retracted into the slot.
[0010] Furthermore, the deceleration mechanism includes a connecting frame and a fixed plate, the top of the connecting frame is fixedly connected to the bottom of the movable plate, the inner side of the connecting frame is rotatably connected to a roller, the surface of the roller is provided with two grooves, the inside of the two grooves are provided with elastic ropes, the inside of the two grooves are respectively slidably connected with resistance blocks through two elastic ropes, and the fixed plate is fixedly connected to the support plate.
[0011] Furthermore, in the initial state, the bottom of the roller is in close contact with the top of the fixed plate, and when the movable plate moves, the roller is driven to move, and the friction between the bottom of the roller and the fixed plate causes the roller to rotate.
[0012] Furthermore, the resistance block is completely located inside the slot in an initial state. The resistance block is made of rubber. When the resistance block is completely located inside the slot, it will not affect the movement of the movable plate. The resistance block made of rubber will generate resistance when it contacts the fixed plate.
[0013] The utility model has the following beneficial effects:
[0014] 1. The utility model is provided with an anti-retraction mechanism, so that after the hydraulic cylinder is turned on to drive the moving block and the injection tube core to move to the left for core insertion, the pull rod can be pulled outward, and the insertion rod will automatically move to the front end and insert into the slot to fix the moving block, thereby preventing retraction during injection molding and affecting the integrity of core pulling.
[0015] 2. The utility model is provided with a deceleration mechanism, so that the speed at which the compression spring rebounds and drives the insertion rod to move toward the front end can be slowed down by the cooperation of the connecting frame, rollers, resistance blocks and other components, thereby preventing the impact force generated by the insertion rod moving toward the front end too quickly from damaging the entire device and reducing its service life.
[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0018] Figure 1 It is a three-dimensional front view of the overall structure of the utility model;
[0019] Figure 2 It is a three-dimensional back view of the overall structure of the utility model;
[0020] Figure 3 It is a three-dimensional schematic diagram of a part of the structure of the utility model;
[0021] Figure 4 It is a three-dimensional cross-sectional view of the anti-retraction mechanism structure of the utility model;
[0022] Figure 5 For this utility model Figure 4 A three-dimensional enlarged view of the structure at center A;
[0023] Figure 6 It is a three-dimensional schematic diagram of the deceleration mechanism structure of the utility model;
[0024] Figure 7 It is a three-dimensional cross-sectional view of the deceleration mechanism structure of the utility model.
[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0026] 1. Base; 2. Guide block; 3. Guide rail; 4. Support plate; 5. Hydraulic cylinder; 6. Moving block; 7. Injection tube core; 8. Track groove; 10. Anti-retraction mechanism; 101. Slot; 102. Insert rod; 103. Moving plate; 104. Compression spring; 105. Slot; 106. Groove; 107. Reset spring; 108. Block; 109. Pull rod; 11. Retarding mechanism; 111. Connecting frame; 112. Roller; 113. Tank body; 114. Elastic rope; 115. Resistance block; 116. Fixed plate. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] See also Figure 1-7 The utility model is a guide structure for pulling out a medical catheter core, comprising a base 1, a guide block 2 is fixedly connected to the top of the base 1, a guide rail 3 is fixedly connected to the top of the guide block 2, a support plate 4 is fixedly connected to the top of the guide block 2, a hydraulic cylinder 5 is arranged on the side of the support plate 4, a moving block 6 is fixedly connected to the output end of the hydraulic cylinder 5, an injection tube core 7 is fixedly connected to the end of the moving block 6 away from the hydraulic cylinder 5, a track groove 8 is provided at the bottom of the moving block 6, and an anti-retraction mechanism 10 and a deceleration mechanism 11 are arranged at the rear end of the base 1; the anti-retraction mechanism 10 comprises a slot 101, an insertion rod 1 02 and groove 106, the slot 101 is opened at the rear end of the moving block 6, the insertion rod 102 passes through and is slidably connected to the rear end of the support plate 4, the rear end of the insertion rod 102 is fixedly connected with the moving plate 103, the surface of the insertion rod 102 is sleeved with a compression spring 104, the side of the insertion rod 102 is provided with a card slot 105, the groove 106 is opened inside the support plate 4, the inside of the groove 106 is provided with a reset spring 107, the inside of the groove 106 is slidably connected with a card block 108 through the reset spring 107, and the end of the card block 108 close to the reset spring 107 is fixedly connected with a pull rod 109.
[0029] The moving block 6 is slidably connected to the guide rail 3 through the bottom track groove 8, and the pull rod 109 penetrates and is slidably connected to the support plate 4. When the moving block 6 moves, it will move along the guide rail 3, making the movement more stable. Pulling the pull rod 109 can drive the card block 108 to leave the card slot 105.
[0030] The size of the end of the insertion rod 102 away from the movable plate 103 is equal to the size of the slot 101, and the compression spring 104 is in a stretched state in the initial state. When the compression spring 104 rebounds, it will drive the insertion rod 102 to move to the front end, and the insertion rod 102 can be inserted into the slot 101.
[0031] In the initial state, two-thirds of the block 108 is located in the slot 105 , and the depth of the slot 106 is greater than the length of the block 108 . The block 108 is stuck in the slot 105 so that the insertion rod 102 cannot move to the front end, and the block 108 can be completely retracted into the slot 106 .
[0032] The deceleration mechanism 11 includes a connecting frame 111 and a fixed plate 116. The top of the connecting frame 111 is fixedly connected to the bottom of the movable plate 103. The inner side of the connecting frame 111 is rotatably connected to a roller 112. Two grooves 113 are provided on the surface of the roller 112. Elastic ropes 114 are provided inside the two grooves 113. Resistance blocks 115 are slidably connected to the inside of the two grooves 113 through two elastic ropes 114 respectively. The fixed plate 116 is fixedly connected to the support plate 4.
[0033] In the initial state, the bottom of the roller 112 is tightly attached to the top of the fixed plate 116 . When the movable plate 103 moves, the roller 112 is driven to move, and the friction between the bottom of the roller 112 and the fixed plate 116 causes the roller 112 to rotate.
[0034] In the initial state, the resistance block 115 is completely inside the groove body 113. The material of the resistance block 115 is rubber. When the resistance block 115 is completely inside the groove body 113, it will not affect the movement of the movable plate 103. When the rubber resistance block 115 contacts the fixed plate 116, resistance will be generated.
[0035] A specific application of this embodiment is: when inserting the core, the hydraulic cylinder 5 is turned on to drive the moving block 6 and the injection tube core 7 to move to the left for core insertion, and the moving block 6 will move along the guide rail 3 when moving, so that the movement is more stable. When the moving block 6 moves to the far left, the pull rod 109 is pulled to drive the clamping block 108 to leave the clamping slot 105 and retract into the groove 106. The return spring 107 is tightened, and when the clamping block 108 leaves the clamping slot 105, the compression spring 104 will rebound and drive the insertion rod 102 to move to the front end and insert it into the slot 101. The insertion rod 102 is inserted into the slot 101 to fix the moving plate 103 to prevent retreat during injection molding. When pulling the core, the insertion rod 102 is first pulled to the rear end to leave the clamping slot 105. At this time, the return spring 107 will rebound and drive the clamping block 108 to clamp into the insertion rod 10 2 The insertion rod 102 is fixed in the card slot 105 on the side, and then the hydraulic cylinder 5 is turned on to drive the moving block 6 and the injection tube core 7 to move to the right to complete the side core pulling. The overall device is small in size and simple to process. In the process of the compression spring 104 rebounding to drive the insertion rod 102 to move to the front end and insert it into the slot 101, the insertion rod 102 moves to the front end at a faster speed, so that the friction rotation between the bottom of the roller 112 and the fixed plate 116 is also faster. At this time, the centrifugal force generated by the fast rotation speed of the roller 112 will throw out the resistance block 115. At this time, the rubber resistance block 115 contacts the fixed plate 116 to generate resistance to slow down the speed of the insertion rod 102 moving to the front end, so as to prevent the impact force generated by the excessive speed from damaging the overall device and reducing the service life.
[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0037] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A guide structure for pulling out a medical catheter, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a guide block (2), the top of the guide block (2) is fixedly connected to a guide rail (3), the top of the guide block (2) is fixedly connected to a support plate (4), a hydraulic cylinder (5) is arranged on the side of the support plate (4), the output end of the hydraulic cylinder (5) is fixedly connected to a moving block (6), the end of the moving block (6) away from the hydraulic cylinder (5) is fixedly connected to an injection tube core (7), a track groove (8) is provided at the bottom of the moving block (6), and an anti-retraction mechanism (10) and a deceleration mechanism (11) are arranged at the rear end of the base (1); The anti-retraction mechanism (10) comprises a slot (101), an insertion rod (102) and a groove (106); the slot (101) is provided at the rear end of the moving block (6); the insertion rod (102) penetrates through and is slidably connected to the rear end of the support plate (4); the rear end of the insertion rod (102) is fixedly connected to the moving plate (103); the surface of the insertion rod (102) is sleeved with a compression spring (104); a slot (105) is provided on the side of the insertion rod (102); the groove (106) is provided inside the support plate (4); a reset spring (107) is provided inside the groove (106); a block (108) is slidably connected inside the groove (106) via the reset spring (107); and a pull rod (109) is fixedly connected to one end of the block (108) close to the reset spring (107).
2. A guide structure for pulling out a medical catheter according to claim 1, characterized in that: The moving block (6) is slidably connected to the guide rail (3) via the bottom track groove (8), and the pull rod (109) penetrates and is slidably connected to the support plate (4).
3. A guide structure for pulling out a core of a medical catheter according to claim 2, characterized in that: The size of one end of the insertion rod (102) away from the movable plate (103) is equal to the size of the slot (101), and the compression spring (104) is in a stretched state in the initial state.
4. A guide structure for pulling out a core of a medical catheter according to claim 3, characterized in that: In the initial state, two thirds of the card block (108) are located in the card slot (105), and the depth of the groove (106) is greater than the length of the card block (108).
5. A guide structure for pulling out a core of a medical catheter according to claim 4, characterized in that: The deceleration mechanism (11) comprises a connecting frame (111) and a fixed plate (116); the top of the connecting frame (111) is fixedly connected to the bottom of the movable plate (103); the inner side of the connecting frame (111) is rotatably connected to a roller (112); the surface of the roller (112) is provided with two grooves (113); the insides of the two grooves (113) are both provided with elastic ropes (114); the insides of the two grooves (113) are respectively slidably connected to resistance blocks (115) via two elastic ropes (114); and the fixed plate (116) is fixedly connected to the support plate (4).
6. A guide structure for pulling out a core of a medical catheter according to claim 5, characterized in that: In an initial state, the bottom of the roller (112) is tightly fitted to the top of the fixing plate (116).
7. A guide structure for pulling out a core of a medical catheter according to claim 6, characterized in that: In an initial state, the resistance block (115) is completely located inside the slot body (113), and the material of the resistance block (115) is rubber.