Medical heat shrink tube cutting device

Abstract

The utility model discloses a medical heat shrink tube cutting device which comprises a fixing base, a synchronous belt wheel set, an adjustable flywheel set and a tube stripping knife assembly, the synchronous belt wheel set comprises two synchronous belt conveying sets, and a first conveying channel is formed between the two synchronous belt conveying sets. The synchronous belt transmission set comprises a bottom plate, a main trapezoidal tooth synchronous wheel, a transmission mechanism and an auxiliary trapezoidal tooth synchronous wheel, an output shaft of the transmission mechanism penetrates through the bottom plate and then is connected with the main trapezoidal tooth synchronous wheel, the auxiliary trapezoidal tooth synchronous wheel is rotationally connected to the bottom plate, and a synchronous belt is connected between the auxiliary trapezoidal tooth synchronous wheel and the main trapezoidal tooth synchronous wheel; two flywheels are rotationally connected to the flat plate, a second conveying channel is formed between the two flywheels, the pipe stripping cutter assembly comprises a pipe stripping base and a cutter, a guide plate is arranged on the side edge of the pipe stripping base, a sharp head portion with the bottom being a plane is arranged at the end, away from the pipe stripping base, of the guide plate, and one side of the cutter is located above the guide plate. The structure prevents the surface of the guide pipe from being scratched in the cutting process.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical catheter production and manufacturing, in particular to a medical heat shrink tube cutting device. BACKGROUND

[0002] Medical catheters are generally composed of multiple layers of materials, and when manufacturing the catheter, the multiple layers of materials need to be combined into one through rheological synthesis. The heat shrink tube is usually nested on the outer surface of the pipe body, and the pipe body is heat fused, and the molten material is extruded together by the shrinkage force of the heat shrink tube. Therefore, after the rheological synthesis of the catheter is completed, a process is required to peel off the nested outer heat shrink tube from the catheter. Therefore, a heat shrink tube cutting device is needed.

[0003] The heat shrink tube cutting device on the market, such as the medical catheter peeling device disclosed in patent application No. 202321116927.2, includes a housing and a blade. The housing has a passage through which the catheter passes. The blade includes a fixed part and a blade edge. The upper part of the fixed part is fixed to the housing, and the blade edge extends into the passage. The bottom surface of the fixed part cooperates with the catheter. The bottom end of the fixed part extends to form a lifting part on one side. The blade edge is arranged adjacent to the lifting part. The blade edge is arranged upward. However, this structure has the following problems:

[0004] 1. The device cannot automatically transport the catheter. Manual transportation is required when peeling off a long catheter, which leads to low work efficiency. Moreover, the device can only operate on relatively short catheters, and the catheter may be easily deviated during the peeling process of long catheters.

[0005] 2. The device cannot straighten the catheter. When peeling off the heat shrink tube, the catheter may be easily scratched on the surface. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a medical heat shrink tube cutting device to solve the problem of the existing heat shrink tube cutting device that cannot automatically transport the catheter and cannot straighten the curved catheter, which may easily scratch the surface of the catheter during cutting the heat shrink tube.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a medical heat shrink tube cutting device includes a fixed seat. The following components are arranged at the front end of the fixed seat:

[0008] A synchronous pulley set for straightening the catheter and driving the catheter to move linearly;

[0009] An adjustable flywheel set for fine-tuning the catheter transported by the synchronous pulley set;

[0010] A pipe stripping knife assembly for stripping the heat-shrinkable tube of the adjusted catheter surface of the adjustable flywheel group;

[0011] Wherein, the synchronous pulley group comprises two sets of upper and lower opposite synchronous belt transmission groups, and a conveying channel one for straightening the catheter is formed between the two sets of synchronous belt transmission groups; each set of synchronous belt transmission group comprises a bottom plate, a main trapezoidal tooth synchronous pulley, a transmission mechanism, an auxiliary trapezoidal tooth synchronous pulley, and a synchronous belt; the output shaft of the transmission mechanism is connected with the main trapezoidal tooth synchronous pulley after penetrating through the bottom plate; the auxiliary trapezoidal tooth synchronous pulley is rotationally connected on the bottom plate; the synchronous belt is connected between the auxiliary trapezoidal tooth synchronous pulley and the main trapezoidal tooth synchronous pulley; the adjustable flywheel group comprises a flat plate, and two flywheels rotationally connected on the flat plate are spaced apart; a gap exists between the two flywheels to form a conveying channel two; the conveying channel two is on the same straight line as the conveying channel one; the pipe stripping knife assembly comprises a pipe stripping seat and a cutter arranged on the side of the pipe stripping seat; the side of the pipe stripping seat is provided with a guide plate; a sharp head portion with a flat bottom is arranged at the end of the guide plate away from the pipe stripping seat; and one side of the cutter is above the guide plate.

[0012] As a preferred, in order to facilitate the heat-shrinkable tube and the catheter to be quickly separated later, the pipe stripping seat and the guide plate are integrally formed; a semicircular channel extending along the length direction of the pipe stripping seat is arranged below the pipe stripping seat; and a chip removal guide is arranged on the front and back sides of the guide plate; and a plurality of bending areas are arranged on the chip removal guide.

[0013] As a preferred, in order to further improve the transmission efficiency of the catheter and straighten the two ends of the catheter, and finally facilitate the cutter to quickly cut, the synchronous pulley group comprises two sets of synchronous pulley groups, which are respectively arranged on the left and right sides of the front end of the fixed seat; and the pipe stripping knife assembly and the adjustable flywheel group are sequentially arranged between the two sets of synchronous pulley groups.

[0014] As a preferred, in order to quickly separate the heat-shrinkable tube and the catheter, the pipe stripping knife assembly comprises two sets of pipe stripping knife assemblies, which are arranged on the front end of the fixed seat in an upper and lower opposite manner; a conveying channel three for the medical catheter to pass through is formed between the two sets of pipe stripping knife assemblies; and the conveying channel three is on the same straight line as the conveying channel two and the conveying channel one.

[0015] As a preferred, in order to facilitate the cutting and stripping of heat-shrinkable tubes with different thicknesses, the cutter is a rhombus blade or a disc blade; the rhombus blade is adjustable in angle; and the disc blade is suitable for thicker heat-shrinkable tubes.

[0016] As a preferred, in order to ensure that the transmission speed is not too fast, the transmission mechanism comprises a cam divider; and the output transmission end of the cam divider is connected with the main trapezoidal tooth synchronous pulley.

[0017] As preferred, in order to conveniently adjust the distance of the conveying passage two, two waist grooves are arranged on the flat plate, the bottom of the flywheel is rotationally connected with an adjusting rod, and locking screws are inserted into the waist grooves and are threadedly locked with the adjusting rod.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] 1、 the guiding plate is additionally arranged in the tool cutting process in the structure, heat shrink tube and pipe body of the catheter can be separated, so that the catheter is damaged by the blade is avoided;

[0020] 2、 the two groups of synchronous pulley groups are used to tighten the two ends of the catheter, the catheter can be straightened, the catheter can be kept in a stretched state, the abrasion of the pipe body surface of the catheter caused by the bending of the catheter is solved, and the two groups of synchronous pulley groups can provide uniform movement of the catheter along the Y axis, artificial steps are simplified, and the problem of deviation in the long size stripping process is solved;

[0021] 3、 the two flywheels are used to further limit the catheter, so that the catheter 7 is deviated along the Y axis;

[0022] 4、 the chip removal guide is arranged on the both sides of the guiding plate, the heat shrink tube can be provided with an acting force, the reaction force of the heat shrink tube on the blade is reduced, and cutting is more smooth. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structure schematic view of a medical heat shrink tube cutting device disclosed in embodiment 1 when a transmission mechanism is separated from other components;

[0024] Figure 2 It is a structure schematic view of a transmission mechanism in embodiment 1;

[0025] Figure 3 It is a structure schematic view of a synchronous belt transmission group without installing a transmission mechanism in embodiment 1;

[0026] Figure 4 It is a front structure schematic view of two groups of synchronous belt transmission groups without installing a transmission mechanism in embodiment 1;

[0027] Figure 5 It is a front structure schematic view of two groups of pipe stripping knife assemblies in embodiment 1;

[0028] Figure 6 It is a structure schematic view of one group of pipe stripping knife assemblies in embodiment 1 Figure 1 ;

[0029] Figure 7 It is a bottom structure schematic view of one group of pipe stripping knife assemblies in embodiment 1;

[0030] Figure 8Structure diagram of the adjustable flywheel group in Example 1;

[0031] Figure 9 For Figure 8 Structure diagram of the adjustable flywheel group in Example 1.

[0032] In the figure: fixed seat 1, adjustable flywheel group 2, flat plate 201, waist groove 2011, adjusting rod 2012, locking screw 2013, flywheel 202, conveying channel two 203, synchronous belt transmission group 3, bottom plate 301, main trapezoidal tooth synchronous wheel 302, transmission mechanism 303, output transmission end 3031, auxiliary trapezoidal tooth synchronous wheel 304, synchronous belt 305, conveying channel one 4, pipe stripping knife assembly 5, pipe stripping seat 501, cutter 502, guide plate 503, pointed head 504, semicircular channel 505, chip removal guide 506, bending area 507, conveying channel three 6, guide pipe 7. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Example 1:

[0035] Please refer to Figures 1-9 The medical heat shrinkable tube cutting device disclosed in the embodiment comprises a fixed seat 1, and the following components are arranged at the front end of the fixed seat 1:

[0036] The synchronous belt wheel group is used for straightening and driving the linear motion of the catheter.

[0037] The adjustable flywheel group 2 is used for fine adjustment of the catheter conveyed by the synchronous belt wheel group.

[0038] The pipe stripping knife assembly 5 is used for stripping the heat shrinkable tube on the surface of the catheter adjusted by the adjustable flywheel group 2.

[0039] The synchronous belt wheel group comprises two sets of synchronous belt transmission groups 3 arranged oppositely upwards, and a conveying channel one 4 for straightening the catheter is formed between the two sets of synchronous belt transmission groups 3. Each set of synchronous belt transmission group 3 comprises a bottom plate 301, a main trapezoidal tooth synchronous wheel 302, a transmission mechanism 303, an auxiliary trapezoidal tooth synchronous wheel 304 and a synchronous belt 305. The output shaft of the transmission mechanism 303 is connected with the main trapezoidal tooth synchronous wheel 302 after penetrating through the bottom plate 301. The auxiliary trapezoidal tooth synchronous wheel 304 is rotationally connected on the bottom plate 301. The synchronous belt 305 is connected between the auxiliary trapezoidal tooth synchronous wheel 304 and the main trapezoidal tooth synchronous wheel 302. The adjustable flywheel group 2 comprises a flat plate 201, and two flywheels 202 are rotationally connected on the flat plate 201 at intervals. A gap exists between the two flywheels 202 to form a conveying channel two 203. The conveying channel two 203 is on the same straight line as the conveying channel one 4. The pipe stripping knife assembly 5 comprises a pipe stripping seat 501 and a cutter 502 arranged on the side of the pipe stripping seat 501. A guide plate 503 is arranged on the side of the pipe stripping seat 501. A sharp head 504 with a flat bottom is arranged at the end of the guide plate 503 away from the pipe stripping seat 501. One side of the cutter 502 is above the guide plate 503,

[0040] As shown in Figure 6 , Figure 7 As a preferred, in order to facilitate the later heat shrink tube and catheter to quickly separate, the pipe stripping seat 501 and the guide plate 503 are integrally formed, and a semicircular channel 505 extending along the length direction of the pipe stripping seat 501 is arranged below the pipe stripping seat 501. Chip removal guide ways 506 are arranged on the front and back sides of the guide plate 503. A plurality of bending areas 507 are arranged on the chip removal guide ways 506. In order to quickly strip the heat shrink tube and the catheter, the pipe stripping knife assembly 5 comprises two sets, and the two sets of pipe stripping knife assemblies 5 are oppositely arranged on the front end of the fixing seat 1. A conveying channel three 6 for facilitating the medical catheter to pass through is formed between the two sets of pipe stripping knife assemblies 5. The conveying channel three 6 is on the same straight line as the conveying channel two 203 and the conveying channel one 4. In this embodiment, in order to facilitate the cutting and stripping of heat shrink tubes with different thicknesses, the cutter 502 is a rhombic blade or a disc blade. In this embodiment, the cutter 502 is a rhombic blade, and the cutting edge of the rhombic blade is a triangular structure. In specific embodiments, the cutter 502 can also be replaced by a disc blade, that is, the cutting edge of the cutter 502 for cutting the heat shrink tube is in the shape of a disc, so that the cutting edge is larger, which can be suitable for cutting thicker heat shrink tubes. In this embodiment, the pipe stripping knife assembly 5 has two sets, which can realize synchronous cutting of the heat shrink tube wrapped around the catheter 7 from top to bottom, and further improve the cutting efficiency.

[0041] As preferred, further improve the transmission efficiency of the catheter and realize the straightening of the two ends of the catheter, ultimately facilitate the rapid cutting of the cutter, the synchronous pulley group has two groups, respectively, on the left and right sides of the front end of the fixed seat 1, between the two groups of synchronous pulley groups, in turn, the pipe stripping cutter assembly 5 and the adjustable flywheel group 2 are arranged, in this embodiment, the synchronous pulley group has two groups and is located on both sides, the two ends of the catheter 7 are straightened to facilitate the rapid cutting of the cutter in the later stage.

[0042] As preferred, in order to ensure that the speed is not too fast during transmission, the transmission mechanism 303 comprises a cam divider, and the output transmission end 3031 of the cam divider is connected with the main trapezoidal tooth synchronous wheel 302.

[0043] As shown in Figure 8 , Figure 9 As preferred, in order to facilitate the adjustment of the distance of the delivery channel two 203, the flat plate 201 is provided with two waist grooves 2011, the bottom of the flywheel 202 is rotatably connected with an adjusting rod 2012, and the waist groove 2011 is inserted with a locking screw 2013 which is threadedly locked with the adjusting rod 2012.

[0044] The working principle of the structure is as follows: the processed catheter 7 is inserted from Figure 1 the right side of the delivery channel one 4 of the synchronous pulley group, and the catheter 7 is straightened by using the upper and lower synchronous belt transmission group 3, at this time, the transmission mechanism 303 on the right side of the synchronous pulley group is driven to work, the main trapezoidal tooth synchronous wheel 302 is rotated, then the auxiliary trapezoidal tooth synchronous wheel 304 is rotated under the action of the synchronous belt 305, so as to realize the linear motion of the catheter 7 on the right side, the catheter 7 is delivered to the delivery channel two 203 of the adjustable flywheel group 2, and the catheter 7 is fine adjusted by the delivery channel two 203 and then delivered to the pipe stripping cutter assembly 5, the heat shrink tube wrapped outside the pipe body of the catheter 7 is stripped by the cutter 502 on the pipe stripping cutter assembly 5, in the stripping process, the sharp head 504 of the head of the guide plate 503 is inserted into the gap between the pipe body of the catheter 7 and the heat shrink tube, to separate the heat shrink tube and the pipe body of the catheter 7, therefore, the guide plate 503 provides protection for the catheter 7, avoids being damaged by the blade, and the chip removal guide 506 formed on both sides of the guide plate 503 can quickly remove the chips, and can provide a force to the heat shrink tube, reduces the reaction force of the heat shrink tube to the blade, so that the cutting is more smooth, the pipe body of the cut catheter 7 is exposed and delivered to the delivery channel one 4 of the left side of the synchronous pulley group, and the catheter 7 with the stripped heat shrink tube is straightened, therefore, the structure has the following technical advantages:

[0045] 1、In the structure, the guide plate 503 is added during the cutting process of the cutter, so that the heat shrink tube and the pipe body of the catheter 7 can be separated, thereby avoiding being damaged by the blade;

[0046] 2, The structure uses two groups of synchronous pulley sets to clamp the two ends of the catheter 7, can have a straightening effect on the catheter 7, and can keep the catheter in a stretched state at all times; solve the scratch of the guide plate 503 on the surface of the catheter 7 due to the bending of the catheter 7 itself; at the same time, the use of two groups of synchronous pulley sets can provide uniform movement of the catheter 7 along the Y-axis axial direction, simplify the manual steps and solve the problem of deviation during the stripping process of the long size;

[0047] 3, The structure uses two flywheels to further limit the catheter, thereby avoiding the deviation of the catheter 7 in the Y-axis direction;

[0048] 4, And the chip removal guide 506 provided on both sides of the guide plate 503 can provide a force on the heat shrink tube, reduce the reaction force of the heat shrink tube on the blade, and make the cutting more smooth.

[0049] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A medical heat shrink tube cutting device comprising a fixed seat (1), characterized in that: The front end of the fixing base (1) is provided with the following components: A synchronous pulley set for straightening and driving the catheter to move linearly; An adjustable flywheel set (2) for fine adjustment of the catheter delivered by the synchronous pulley set; A pipe stripping knife assembly (5) for stripping the heat shrink tube of the catheter adjusted by the adjustable flywheel set (2); The synchronous pulley set comprises two sets of synchronous belt transmission sets (3) arranged oppositely above and below, and a delivery channel one (4) for straightening the catheter is formed between the two sets of synchronous belt transmission sets (3). Each set of synchronous belt transmission set (3) comprises a bottom plate (301), a main trapezoidal tooth synchronous wheel (302), a transmission mechanism (303), an auxiliary trapezoidal tooth synchronous wheel (304), and a synchronous belt (305). The output shaft of the transmission mechanism (303) is connected with the main trapezoidal tooth synchronous wheel (302) after penetrating through the bottom plate (301). The auxiliary trapezoidal tooth synchronous wheel (304) is rotatably connected to the bottom plate (301). The auxiliary trapezoidal tooth synchronous wheel (304) and the main trapezoidal tooth synchronous wheel (302) are connected by the synchronous belt (305). The adjustable flywheel set (2) comprises a flat plate (201). Two flywheels (202) are rotatably connected to the flat plate (201) at intervals. A gap exists between the two flywheels (202) to form a delivery channel two (203). The delivery channel two (203) is on the same straight line as the delivery channel one (4). The pipe stripping knife assembly (5) comprises a pipe stripping seat (501) and a cutter (502) arranged on the side of the pipe stripping seat (501). The side of the pipe stripping seat (501) is provided with a guide plate (503). The end of the guide plate (503) away from the pipe stripping seat (501) is provided with a sharp head (504) with a flat bottom. One side of the cutter (502) is above the guide plate (503).

2. The medical heat shrink tube cutting device according to claim 1, wherein The pipe stripping seat (501) and the guide plate (503) are integrally formed. The lower side of the pipe stripping seat (501) is provided with a semicircular channel (505) extending along the length direction of the pipe stripping seat (501). The front and rear sides of the guide plate (503) are provided with chip removal guide paths (506). A plurality of bending areas (507) are arranged on the chip removal guide paths (506).

3. A medical heat shrink tube cutting device according to claim 2, wherein The synchronous pulley set comprises two sets of synchronous pulley sets arranged on the left and right sides of the front end of the fixing base (1). The pipe stripping knife assembly (5) and the adjustable flywheel set (2) are sequentially arranged between the two sets of synchronous pulley sets.

4. The medical heat shrink tube cutting device according to claim 3, wherein The pipe stripping knife assembly (5) comprises two sets of pipe stripping knife assemblies arranged oppositely above and below at the front end of the fixing base (1). A delivery channel three (6) for the medical catheter is formed between the two sets of pipe stripping knife assemblies (5). The delivery channel three (6) is on the same straight line as the delivery channel two (203) and the delivery channel one (4).

5. The medical heat shrink tube cutting device according to claim 1, wherein The cutter (502) is a rhombus-shaped blade.

6. The medical heat shrink tube cutting device according to claim 1 or 2 or 3 or 4 or 5, wherein, The transmission mechanism (303) comprises a cam divider. The output transmission end (3031) of the cam divider is connected with the main trapezoidal tooth synchronous wheel (302).

7. A medical heat shrink tube cutting device according to claim 1 or 2 or 3 or 4 or 5, wherein, Two waist grooves (2011) are arranged on the flat plate (201), the bottom of the flywheel (202) is rotationally connected with an adjusting rod (2012), and the waist grooves (2011) are inserted with locking screws (2013) which are threadedly locked with the adjusting rod (2012).

Images