A melt head forming device for a drainage catheter

Abstract

The application discloses a drainage catheter melt head forming device, which comprises a base, a translation driving mechanism, a mold base, a core needle base and a core needle. The translation driving mechanism is arranged on the base, and the mold base is arranged on the base and located at one end of the translation driving mechanism along a translation direction. The core needle base is in transmission connection with the translation driving mechanism. The core needle has a thick diameter body and a thin diameter body. The thick diameter body is connected to the core needle base, the thin diameter body is connected to one end of the thick diameter body, a reinforced core limiting table is formed between the thick diameter body and the thin diameter body, and the translation driving mechanism can drive the core needle base to drive the core needle to move close to or away from the mold base. In the drainage catheter melt head process, one end of the reinforced core can abut against the limiting table, the core needle base is driven by the translation driving mechanism to move close to the mold base, and when the head end of the catheter is pushed into the mold which has been heated, the limiting table limits the axial reverse walking of the reinforced core, so that the end head structure of the produced drainage catheter has good hardness, the product quality has good stability, and the defective products are few.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a drainage catheter tip forming device. BACKGROUND

[0002] A drainage catheter is a medical auxiliary device, mainly used for guiding the accumulated liquid (such as blood, pus, exudate, etc.) or gas in the body to the outside of the body after surgery or during a specific medical process, so as to promote healing and prevent infection. The drainage catheter used in interventional surgery needs to be made into a catheter with a taper and a hardened taper, so as to facilitate the extension into the patient's body through the skin and reduce the harm to the patient. In the production process of such drainage catheter, a catheter with straight ends is first made, then a short straight reinforcing core is made, the hardness of the reinforcing core is higher than that of the catheter, and then a tip of the catheter end is made by using a drainage catheter tip equipment.

[0003] The drainage catheter tip equipment comprises a base, a translation driving mechanism, a mold seat, a core needle seat and a core needle. The translation driving mechanism is arranged on the base, and the mold seat is arranged on the base and located at one end of the translation driving mechanism in the translation direction. The core needle seat and the translation driving mechanism are in transmission connection, and the core needle is an elongated needle body. The translation driving mechanism can drive the core needle seat to drive the core needle to approach or move away from the mold seat.

[0004] In the drainage catheter tip process, the mold on the mold seat is usually heated, then the reinforcing core is inserted into the catheter, the catheter with the reinforcing core is sleeved on the core needle, and then the translation driving mechanism is started to drive the core needle seat to translate and approach the mold seat, so that the head end of the catheter is pushed into the heated mold. The heating makes the head end of the catheter and the reinforcing core covered as one, and the reinforcing core is not exposed and formed into a tapered shape. Since there is no limiting or fixing structure between the reinforcing core and the catheter, when the catheter with the reinforcing core is pushed into the mold for heating, the reinforcing core may have the risk of axial retreat to one side of the end of the catheter. The stability of the processing process is poor, the hardness of the end structure of the produced drainage catheter is poor, and there are many defective products.

[0005] Therefore, the present application is proposed. SUMMARY

[0006] To solve one of the above technical defects, the present application provides a drainage catheter tip forming device.

[0007] The present application provides the following technical scheme:

[0008] A drainage catheter tip forming device comprises:

[0009] a base;

[0010] a translation driving mechanism arranged on the base;

[0011] a mold base arranged on the base, the mold base being located at one end of the translation driving mechanism along the translation direction;

[0012] a needle base in transmission connection with the translation driving mechanism;

[0013] a needle having a thick diameter body and a thin diameter body, the thick diameter body being connected to the needle base, the thin diameter body being connected to one end of the thick diameter body, a reinforced needle limiting platform being formed between the thick diameter body and the thin diameter body;

[0014] the translation driving mechanism being capable of driving the needle base to drive the needle to approach or move away from the mold base.

[0015] Optionally, the thick diameter body is provided with a tapered section at one end close to the thin diameter body;

[0016] In the direction from the thin diameter body to the thick diameter body, the outer diameter of the tapered section gradually increases.

[0017] Optionally, the needle base has a main base body, a buffer base and an elastic support base;

[0018] the main base body being in transmission connection with the translation driving mechanism;

[0019] the buffer base being slidably arranged on the main base body, the elastic support base being arranged on the main base body, the elastic support base being located on the side of the buffer base away from the mold base, the elastic support base being elastically abutted against the buffer base;

[0020] the thick diameter body of the needle being fixed on the buffer base.

[0021] Optionally, a guide rail is arranged on the main base body, the guide rail extending along the translation direction of the translation driving mechanism;

[0022] a sliding block being arranged on the buffer base;

[0023] the sliding block being slidably connected to the guide rail.

[0024] Optionally, the elastic support base comprises a base frame and an elastic component;

[0025] the base frame being fixed on one end of the main base body away from the mold base;

[0026] the elastic component having two ends respectively abutted against the base frame and the buffer base.

[0027] Optionally, the buffer base has a receiving groove;

[0028] the elastic support base comprising a guide member, the guide member being fixed on the base frame, the guide member extending into the receiving groove.

[0029] The elastic component is sleeved on the guide;

[0030] One end of the elastic component abuts against the guide, the other end of the elastic component is accommodated in the accommodating groove, and abuts against the buffer seat.

[0031] Optionally, the drainage catheter melt head forming device comprises a fixing assembly;

[0032] The fixing assembly is arranged at one end of the main body close to the mold seat;

[0033] The fixing assembly has a clamp for clamping or releasing the core needle and the pipe body sleeved on the core needle.

[0034] Optionally, the mold seat has an end plate, a melt head component and a heating component;

[0035] The end plate is fixed on the base;

[0036] The melt head component is arranged on the end plate, and the melt head component has a through tapered cavity;

[0037] The heating component is arranged on the end plate, and the heating component can be sleeved on the melt head component.

[0038] Optionally, the drainage catheter melt head forming device comprises a driving component, a first gear and a second gear;

[0039] The melt head component is rotatably arranged on the end plate, and the first gear is connected to the melt head component;

[0040] The second gear is rotatably connected to the end plate, and the second gear and the first gear are engaged;

[0041] The driving component is arranged on the end plate, and the driving component is connected to the second gear.

[0042] Optionally, the translation driving mechanism comprises a main body, a motor and a lead screw;

[0043] The motor is arranged at one end of the main body, and the lead screw is rotatably arranged on the main body;

[0044] The core needle seat is threadedly connected to the lead screw, and the core needle seat is slidably connected to the main body;

[0045] The motor and the lead screw are in transmission connection, driving the lead screw to rotate to drive the core needle seat to translate along the main body.

[0046] By adopting the above technical scheme, the present application has the following beneficial effects:

[0047] The melt head forming device of the drainage catheter of the present application can make one end of the reinforcing core abut against the limiting table in the melt head process of the drainage catheter, the translation driving mechanism drives the core needle base to translate and approach the mold base, when the head end of the catheter is pushed into the mold which has been heated, the limiting table limits the axial backward movement of the reinforcing core, so that the end head structure of the produced drainage catheter has good hardness, the product quality has good stability, and the defective products are few. BRIEF DESCRIPTION OF DRAWINGS

[0048] The accompanying drawings, which are part of this application, serve to further understand the present application, the illustrative embodiments of the present application and the description thereof serve to explain the present application, but do not constitute undue limitation on the present application. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained from these drawings without creative labor for those skilled in the art.

[0049] Figure 1 The structural schematic diagram of the melt head forming device of the drainage catheter provided by the embodiment of the present disclosure is shown in the figure;

[0050] Figure 2 The another view of the melt head forming device of the drainage catheter provided by the embodiment of the present disclosure is shown in the figure;

[0051] Figure 3 The structural schematic diagram of the core needle base, the core needle and the fixing assembly of the melt head forming device of the drainage catheter provided by the embodiment of the present disclosure is shown in the figure; Figure 1 The enlarged view of A in the figure;

[0052] Figure 4 The structural schematic diagram of the end of the core needle of the melt head forming device of the drainage catheter provided by the embodiment of the present disclosure is shown in the figure;

[0053] Figure 5 The structural schematic diagram of the end of the core needle of the melt head forming device of the drainage catheter provided by the embodiment of the present disclosure is shown in the figure;

[0054] Figure 6 The structural schematic diagram of the main base body of the melt head forming device of the drainage catheter provided by the embodiment of the present disclosure is shown in the figure;

[0055] Figure 7 The structural schematic diagram of the buffer seat of the melt head forming device of the drainage catheter provided by the embodiment of the present disclosure is shown in the figure;

[0056] Figure 8 The structural schematic diagram of the clamp jaw of the melt head forming device of the drainage catheter provided by the embodiment of the present disclosure is shown in the figure.

[0057] In the figure: base 1, translation driving mechanism 2, main body part 21, motor 22, speed reducer 23, connecting shaft 24, mold base 3, end plate 31, melting head part 32, heating part 33, core needle base 4, main base body 41, guide rail 411, buffer base 42, sliding block 421, containing groove 422, elastic support base 43, seat frame 431, elastic part 432, guide part 433, cap body 4331, stud section 4332, guide column 4333, core needle 5, coarse diameter body 51, cone section 511, fine diameter body 52, limiting table 53, fixed assembly 6, finger air cylinder 61, sliding groove 611, sliding block 62, clamp 63, clamping jaw 631, clamping notch 6311, driving part 7, first gear 8, second gear 9. DETAILED DESCRIPTION

[0058] To make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. The following embodiments are used to explain the present disclosure but not to limit the scope of the present disclosure.

[0059] Referring to Figures 1 to 8 As shown in the figure, the present disclosure provides a drainage catheter melting head forming device, which comprises a base 1, a translation driving mechanism 2, a mold base 3, a core needle base 4 and a core needle 5. The translation driving mechanism 2 is arranged on the base 1. The mold base 3 is arranged on the base 1, and the mold base 3 is located at one end of the translation driving mechanism 2 along the translation direction. The core needle base 4 is drivingly connected with the translation driving mechanism 2. The core needle 5 has a coarse diameter body 51 and a fine diameter body 52, the coarse diameter body 51 is connected with the core needle base 4, the fine diameter body 52 is connected with one end of the coarse diameter body 51, and a reinforcing core limiting table 53 is formed between the coarse diameter body 51 and the fine diameter body 52. The translation driving mechanism 2 can drive the core needle base 4 to drive the core needle 5 to approach or move away from the mold base 3. The cross-sectional diameter of the reinforcing core is between the cross-sectional diameters of the fine diameter body 52 and the coarse diameter body 51, so that the reinforcing core can be sleeved on the fine diameter body 52, and one end of the reinforcing core can abut against the limiting table 53. The core needle 5 of the drainage catheter melting head forming device of the present application has a coarse diameter body 51 and a fine diameter body 52, and a reinforcing core limiting table 53 is formed between the coarse diameter body 51 and the fine diameter body 52. In the drainage catheter melting head process, the reinforcing core can be sleeved on the fine diameter body 52, and one end of the reinforcing core can abut against the limiting table 53. When the translation driving mechanism 2 drives the core needle base 4 to translate to approach the mold base 3, the limiting table 53 limits the axial back movement of the reinforcing core, so that the end structure of the produced drainage catheter has good hardness, the stability of the processing process is good, the quality of the produced product is stable, and the number of defective products is small.

[0060] As Figure 5As shown, the thick diameter body 51 is provided with a tapered section 511 near one end of the thin diameter body 52, and the outer diameter of the tapered section 511 gradually increases in the direction from the thin diameter body 52 to the thick diameter body 51. In the process of fusing the catheter to the guide tube, the guide tube can be first sleeved on the core needle 5, and then the reinforcing core is sleeved on the thin diameter body 52, with one end of the reinforcing core abutting against the limiting table 53, so that the position between the reinforcing core and the guide tube is fixed. When the core needle 5 with the guide tube and the reinforcing core is pushed into the mold seat 3, the tapered section 511 plays a role of internal support, so that the guide tube and the reinforcing core are integrally formed into a tapered shape. The tapered section 511 has a supporting effect on the molding, and the tapered surface is formed well.

[0061] In a possible implementation, as shown in Figure 1 、 Figure 2 and Figure 4 , the core needle seat 4 has a main seat body 41, a buffer seat 42 and an elastic support seat 43. The main seat body 41 is drivingly connected to the translation driving mechanism 2. The buffer seat 42 is slidably arranged on the main seat body 41, and the elastic support seat 43 is arranged on the main seat body 41. The elastic support seat 43 is located on the side of the buffer seat 42 away from the mold seat 3, and elastically abuts against the buffer seat 42. The thick diameter body 51 of the core needle 5 is fixed to the buffer seat 42. When the translation driving mechanism 2 drives the core needle seat 4 to move the core needle 5 to approach the mold seat 3, the core needle 5 may not be accurately aligned, and the core needle 5 abuts against the mold seat 3, which generates a reaction force to the side of the elastic support seat 43. The buffer seat 42 and the elastic support seat 43 are elastically matched, so that the reaction force is buffered. If the buffer seat 42 and the elastic support seat 43 are not arranged, the core needle 5 may be damaged, which affects the normal operation of the equipment.

[0062] As shown in Figure 4 、 Figure 6 and Figure 7 , a guide rail 411 is arranged on the main seat body 41, and the guide rail 411 extends in the translation direction of the translation driving mechanism. A sliding block 421 is arranged on the buffer seat 42, and the sliding block 421 is slidably connected to the guide rail 411. When the core needle 5 is not accurately aligned, the core needle 5 generates a reaction force to the side of the elastic support seat 43. The reaction force drives the buffer seat 42 to slide along the guide rail 411 and press the elastic support seat 43.

[0063] As shown in Figure 4As shown, the elastic support seat 43 comprises a seat frame 431 and an elastic component 432. The seat frame 431 is fixed to one end of the main seat body 41 away from the mold seat 3. The elastic component 432 is abutted to the seat frame 431 and the buffer seat 42 respectively at two ends. The elastic component 432 can be a spring.

[0064] As shown in Figure 2 、 Figure 4 and Figure 7 , the buffer seat 42 has a receiving groove 422. The elastic support seat 43 comprises a guide piece 433. The guide piece 433 is fixed to the seat frame 431. The guide piece 433 extends into the receiving groove 422. The elastic component 432 is sleeved on the guide piece 433. One end of the elastic component 432 is abutted to the guide piece 433. The other end of the elastic component 432 is received in the receiving groove 422 and abutted to the buffer seat 42. The receiving groove 422 plays a positioning role on the elastic component 432, preventing the end of the elastic component 432 from being inclined outward. The guide piece 433 comprises a cap body 4331, a stud segment 4332 and a guide column 4333. The cap body 4331 is connected to the stud segment 4332. The guide column 4333 is connected to the stud end. A threaded groove is arranged on the seat frame 431. The guide piece 433 penetrates through the threaded groove. The stud segment 4332 is threadedly connected to the threaded groove. A step is formed between the stud segment 4332 and the guide column 4333. The elastic component 432 is sleeved on the guide column 4333. The two ends of the elastic component 432 are abutted to the step and the receiving groove 422. By rotating the cap body 4331, the distance between the buffer seat 42 and the seat frame 431 can be adjusted, so as to adjust the size of the elastic force between the buffer seat 42 and the seat frame 431.

[0065] In a possible implementation, as shown in Figure 1 、 Figure 4 and Figure 8As shown, the drainage catheter melt head forming device comprises a fixing assembly 6. The fixing assembly 6 is arranged on the main base body 41 near one end of the mold base 3. The fixing assembly 6 has a clamp 63 for clamping or releasing the core needle 5 and the pipe body sleeved on the core needle 5. The fixing assembly 6 comprises a finger air cylinder 61, two sliding blocks 62 and the clamp 63. The finger air cylinder 61 is connected to the main base body 41. The finger air cylinder 61 is provided with a sliding groove 611. The two sliding blocks 62 are slidably arranged in the sliding groove 611. The clamp 63 comprises two clamping jaws 631. The two clamping jaws 631 are respectively connected to the corresponding sliding blocks 62. The finger air cylinder 61 drives the two sliding blocks 62 to drive the two clamping jaws 631 to approach each other or to move away from each other in the opposite direction, so as to perform clamping or releasing action. One end of the core needle 5 is connected to the core needle base 4. The other end of the core needle 5 is a suspended end. The suspended end is easily inclined downward under the action of gravity, which affects the smooth passage of the core needle 5 through the mold base 3. The clamp 63 clamps the suspended end of the core needle 5, so that the core needle 5 can always maintain a horizontal shape and be easily aligned with the mold base 3. The clamping notches 6311 are arranged on the side of the two clamping jaws 631 facing each other. In the state that the two sliding blocks 62 approach each other, the clamping notches 6311 on the two clamping jaws 631 are connected to form a bayonet. The bayonet is used to clamp the outer wall of the catheter on the core needle 5.

[0066] In a possible implementation, as shown in Figure 1 and Figure 3 As shown, the mold base 3 has an end plate 31, a melt head piece 32 and a heating piece 33. The end plate 31 is fixed on the base 1. The melt head piece 32 is arranged on the end plate 31. The melt head piece 32 has a through taper cavity. The heating piece 33 is arranged on the end plate 31. The heating piece 33 can be sleeved on the melt head piece 32. When the translation driving mechanism 2 drives the core needle base 4 to approach the mold base 3, the core needle 5 with the pipe body sleeved thereon enters the taper cavity. The taper cavity is beneficial to form a taper type on the outer wall end of the pipe body on the core needle 5. Under the action of the heating piece 33, the pipe body and the reinforcing core are fused into a sharp conical shape.

[0067] In a possible implementation, as shown in Figure 1 and Figure 2As shown, the drainage catheter melt head forming device comprises a driving member 7, a first gear 8 and a second gear 9. The melt head member 32 is rotatably arranged on the end plate 31, and the first gear 8 is connected to the melt head member 32. The second gear 9 is rotatably connected to the end plate 31, and the second gear 9 and the first gear 8 are engaged. The driving member 7 is arranged on the end plate 31, and the driving member 7 is connected to the second gear 9. The driving member 7 can drive the second gear 9 to rotate, thereby driving the first gear 8 to rotate, and further driving the melt head member 32 to rotate. The rotation of the melt head member 32 uniformly heats the end of the tube body sleeved on the core needle 5, and the quality of the formed product is good.

[0068] In one possible embodiment, as shown in Figure 1 and Figure 2 As shown, the translation driving mechanism 2 comprises a main body 21, a motor 22 and a lead screw. The motor 22 is arranged at one end of the main body 21, and the lead screw is rotatably arranged in the main body 21. The core needle seat 4 is threadedly connected to the lead screw, and the core needle seat 4 is slidably connected to the main body 21. The motor 22 and the lead screw are in transmission connection, driving the lead screw to rotate to drive the core needle seat 4 to translate along the main body 21. The main seat body 41 of the core needle seat 4 is threadedly connected to the lead screw, and the lead screw is arranged inside the main body 21. The translation driving mechanism 2 can further comprise a speed reducer 23 and a connecting shaft 24. The input end of the speed reducer 23 is connected to the motor 22, the output end of the speed reducer 23 is connected to the connecting shaft 24, and the connecting shaft 24 is connected to the lead screw. The motor 22 operates in sequence to drive the speed reducer 23, the connecting shaft 24 and the lead screw to move, thereby moving the core needle seat 4 connected to the lead screw along the length direction of the lead screw to drive the core needle seat 4 to drive the core needle 5 to approach or move away from the mold seat 3.

[0069] In the process of the drainage catheter melt head, the catheter wall is thin and soft, and the axial support force of the whole catheter is small, so the heat of the mold is transferred to the catheter and then transferred outward along the catheter, so that the catheter in the tapered cavity is softened. In this process, since the axial support force of the catheter is already weak, and the axial support force of the catheter is further reduced after the catheter is softened, when the pressure is applied to push the catheter into the mold seat 3, although the catheter can be slowly formed, the catheter can be formed in the exposed part of the mold, and the reinforcing core is wrapped inside, and the temperature is not raised in time, which can cause the reinforcing core to be not formed, the reinforcing core to be not hot-melted, the catheter to be wrinkled, and the reinforcing core to be out of position. In view of the above situation, the drainage catheter melt head forming device of the present application can be used to preheat the reinforcing core before the drainage catheter melt head forming operation, then sequentially sleeve the catheter and the reinforcing core, and then send the catheter into the mold seat 3 for hot-melt forming, and then automatically exit and reset after completion. The reinforcing core is preheated, the temperature of the catheter and the reinforcing core is balanced during work, so that the catheter and the reinforcing core can be quickly fused together, the hot-melt effect is good, and the conditions such as the reinforcing core not being formed, the catheter being wrinkled, and the reinforcing core being out of position are avoided.

[0070] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and do not limit the present application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited by the claims and their entire scope and equivalents.

Claims

1. A melt head forming device for a drainage catheter, characterized in that, It comprises: a base; a translation driving mechanism arranged on the base; a mold seat arranged on the base, which is located at one end of the translation driving mechanism along the translation direction; a needle seat in transmission connection with the translation driving mechanism, which has a main seat body, a buffer seat and an elastic support seat, the main seat body is in transmission connection with the translation driving mechanism, the buffer seat is slidably arranged on the main seat body, the elastic support seat is arranged on the main seat body, the elastic support seat is located on the side of the buffer seat away from the mold seat, the elastic support seat elastically abuts against the buffer seat, a guide rail is arranged on the main seat body and extends along the translation direction of the translation driving mechanism, a sliding block is arranged on the buffer seat and is slidably connected with the guide rail, the elastic support seat comprises a seat frame and an elastic component, one end of the seat frame is fixed to the main seat body away from the mold seat, the elastic component abuts against the seat frame and the buffer seat at two ends respectively, the buffer seat has a containing groove, the elastic support seat comprises a guide piece fixed to the seat frame, the guide piece extends into the containing groove, the elastic component is sleeved on the guide piece, one end of the elastic component abuts against the guide piece, and the other end of the elastic component is contained in the containing groove and abuts against the buffer seat; a needle having a thick diameter body and a thin diameter body, the thick diameter body is connected with the needle seat, the thin diameter body is connected with one end of the thick diameter body, a reinforced needle limiting table is formed between the thick diameter body and the thin diameter body, a taper section is arranged on one end of the thick diameter body close to the thin diameter body, the outer diameter of the taper section gradually increases in the direction from the thin diameter body to the thick diameter body, and the thick diameter body of the needle is fixed on the buffer seat. The translation driving mechanism can drive the needle seat to drive the needle to approach or move away from the mold seat.

2. The drainage catheter melt head forming device of claim 1, wherein, It comprises a fixing assembly. The fixing assembly is arranged on one end of the main seat body close to the mold seat. The fixing assembly has a clamp for clamping or releasing the needle and the pipe body sleeved on the needle.

3. The drainage catheter melt head forming apparatus of claim 1, wherein, The mold seat has an end plate, a melting head piece and a heating piece. The end plate is fixed on the base. The melting head piece is arranged on the end plate, and the melting head piece has a through taper cavity. The heating piece is arranged on the end plate, and the heating piece can be sleeved on the melting head piece.

4. The drainage catheter melt head forming apparatus of claim 3, wherein, It comprises a driving piece, a first gear and a second gear. The melting head piece is rotatably arranged on the end plate, and the first gear is connected with the melting head piece. The second gear is rotatably connected with the end plate, and the second gear is in meshing connection with the first gear. The driving piece is arranged on the end plate, and the driving piece is connected with the second gear.

5. The drainage catheter melt head forming apparatus of any of claims 1-4, wherein, The translation driving mechanism comprises a main body, a motor and a lead screw. The motor is arranged on one end of the main body, and the lead screw is rotatably arranged on the main body. The needle seat is threadedly connected with the lead screw, and the needle seat is slidably connected with the main body. The motor and the lead screw are in transmission connection, drive the lead screw to rotate, drive the needle holder to translate along the main body.

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