A cannula puncture device with controllable puncture depth

Abstract

The utility model discloses a casing puncture ware of controllable puncture depth belongs to medical instrument technical field, and its technical key points include puncture device main part and install puncture pipe in puncture device main part inside, still include the fixed block of setting in puncture pipe surface, the fixed block is set in the surface of puncture pipe, and with the sliding connection of puncture pipe, this utility model can utilize the rotation of the tooth block to drive several rubber wheels to rotate through several bevel gears, and the depth of puncture pipe is conveniently controlled, the utility model discloses through being equipped with the ruler and the lamp, through the illumination of the lamp and the sinking of the ruler, and conveniently, the doctor observes it, the utility model discloses through being equipped with the locating ball and the clamping plate, and conveniently, when the puncture pipe cannot be straight down, rotates it.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a cannula puncture device with controllable puncture depth. Background Technology

[0002] With the development of modern medicine, minimally invasive surgery has become the future direction of surgical procedures. Minimally invasive surgery is characterized by less trauma, faster recovery, and less pain, making it a common goal and direction pursued by modern medicine. A trocar is a surgical instrument that punctures the abdominal wall to provide a passage for other surgical instruments into the body cavity. It belongs to the category of minimally invasive surgical instruments. A trocar typically includes a cannula assembly that serves as the passage for other surgical instruments and a trocar penetrating the cannula assembly. During surgery, to penetrate the skin, the epidermis is first cut with a scalpel. Then, the trocar penetrates the skin and enters the body cavity along with the cannula body. The trocar is then withdrawn. The cannula assembly then serves as a channel for introducing various instruments and tools into the abdominal cavity and for providing air insufflation to elevate the abdominal wall above organs.

[0003] A search revealed that the announcement number CN202010245798.1 discloses a cannula puncture device. However, the use of this device still relies on the doctor's experience to determine the puncture depth, making it difficult to learn, time-consuming to master, and inconvenient to use.

[0004] To address these issues, we propose a cannula trocar with controllable puncture depth. Utility Model Content

[0005] The purpose of this invention is to provide a cannula puncture device with controllable puncture depth to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cannula puncture device with controllable puncture depth, comprising a puncture device body and a puncture tube installed inside the puncture device body, and a fixing block disposed on the surface of the puncture tube. The fixing block is sleeved on the surface of the puncture tube and slidably connected to the puncture tube. A positioning groove is provided inside the fixing block, and a plurality of rubber wheels are evenly disposed inside the positioning groove. Two positioning rods are symmetrically fixedly connected to both ends of each rubber wheel. A bevel gear is fixedly connected to the end of each positioning rod away from the rubber wheel. Each bevel gear is meshed. A rotating shaft is fixedly connected to the surface of one of the bevel gears. The rotating shaft passes through the surface of the fixing block and is rotatably connected to the fixing block.

[0007] Preferably, the surface of the fixing block is provided with a toothed groove, and a toothed block is provided inside the toothed groove. The toothed block is slidably connected to the fixing block through the toothed groove. The end of the rotating shaft away from the bevel gear is inserted into the toothed block and slidably connected thereto. A tension spring is provided inside the toothed block, and the two ends of the tension spring are fixedly connected to the toothed block and the rotating shaft, respectively.

[0008] Preferably, a light is mounted on the surface of the fixing block via a mounting base, and a ruler is fixedly connected to the surface of the puncture tube.

[0009] Preferably, a limiting plate is provided below the fixing block, and a positioning ball is rotatably connected inside the limiting plate. The puncture tube passes through the positioning ball and is rotatably connected to it.

[0010] Preferably, the limiting plate has two symmetrically arranged clamping plates inside, which are slidably connected to the limiting plate. The adjacent sides of the two clamping plates are in contact with the positioning ball. A screw sleeve is fixedly connected to the side of one clamping plate away from the positioning ball. A screw rod is threadedly connected to the inside of the screw sleeve. The screw rod passes through the limiting plate and is rotatably connected to the limiting plate. A knob is fixedly connected to the end of the screw rod away from the screw sleeve. Two connecting rods are symmetrically fixedly connected to both sides of the other clamping plate. The connecting rods are slidably connected to the limiting plate. A positioning plate is threadedly connected to the surface of the screw rod. The positioning plate is slidably connected to the limiting plate. The positioning plate is fixedly connected to the connecting rod.

[0011] Preferably, the threads of the positioning plate and the screw sleeve are in opposite directions.

[0012] Preferably, a rubber ring is fixedly connected to the side of the limiting plate away from the fixing block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, by providing rubber wheels, bevel gears and tooth blocks, can utilize the rotation of the tooth blocks to drive the rotation of several rubber wheels through several bevel gears, thus facilitating control of the puncture depth.

[0015] 2. This utility model is equipped with a ruler and a light. The illumination of the light and the sinking of the ruler make it convenient for doctors to observe.

[0016] 3. This utility model, by providing a positioning ball and a clamping plate, facilitates rotation of the puncture tube when it cannot be inserted straight down. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2This is a schematic diagram of the vertical cross-sectional structure of the fixing block of this utility model;

[0019] Figure 3 This is a schematic diagram of the horizontal cross-sectional structure of the fixing block of this utility model;

[0020] Figure 4 This is a horizontal cross-sectional view of the limiting plate of this utility model;

[0021] Figure 5 In this utility model Figure 3 A schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Main body of the puncture device; 2. Puncture tube; 3. Fixing block; 4. Tooth block; 5. Positioning groove; 6. Rubber wheel; 7. Positioning rod; 8. Bevel gear; 9. Rotating shaft; 10. Tooth groove; 11. Tension spring; 12. Limiting plate; 13. Positioning ball; 14. Knob; 15. Screw; 16. Clamping plate; 17. Connecting rod; 18. Positioning plate; 19. Screw sleeve; 20. Rubber ring; 21. Ruler; 22. Light. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 This utility model provides a cannula puncture device with controllable puncture depth, including a puncture device body 1 and a puncture tube 2 installed inside the puncture device body 1, and a fixing block 3 disposed on the surface of the puncture tube 2. The fixing block 3 is sleeved on the surface of the puncture tube 2 and slidably connected to the puncture tube 2. The fixing block 3 has a positioning groove 5 inside, and several rubber wheels 6 are evenly arranged inside the positioning groove 5. Two positioning rods 7 are symmetrically fixedly connected to both ends of each rubber wheel 6. A bevel gear 8 is fixedly connected to the end of each positioning rod 7 away from the rubber wheel 6. Each bevel gear 8 is meshed. A rotating shaft 9 is fixedly connected to the surface of one of the bevel gears 8. The rotating shaft 9 passes through the surface of the fixing block 3 and is rotatably connected to the fixing block 3.

[0025] In this embodiment, the surface of the fixing block 3 is provided with a toothed groove 10, and a toothed block 4 is provided inside the toothed groove 10. The toothed block 4 is slidably connected to the fixing block 3 through the toothed groove 10. The end of the rotating shaft 9 away from the bevel gear 8 is inserted into the toothed block 4 and slidably connected thereto. A tension spring 11 is provided inside the toothed block 4, and the two ends of the tension spring 11 are fixedly connected to the toothed block 4 and the rotating shaft 9 respectively.

[0026] In this embodiment, a lamp 22 is mounted on the surface of the fixing block 3 via a mounting base, and a ruler 21 is fixedly connected to the surface of the puncture tube 2.

[0027] In this embodiment, a limiting plate 12 is provided below the fixing block 3, and a positioning ball 13 is rotatably connected inside the limiting plate 12. The puncture tube 2 passes through the positioning ball 13 and is rotatably connected to it.

[0028] In this embodiment, two clamping plates 16 are symmetrically arranged inside the limiting plate 12. The clamping plates 16 are slidably connected to the limiting plate 12. The adjacent sides of the two clamping plates 16 are in contact with the positioning ball 13. A screw sleeve 19 is fixedly connected to the side of one clamping plate 16 away from the positioning ball 13. A screw rod 15 is threadedly connected inside the screw sleeve 19. The screw rod 15 passes through the limiting plate 12 and is rotatably connected to the limiting plate 12. A knob 14 is fixedly connected to the end of the screw rod 15 away from the screw sleeve 19. Two connecting rods 17 are symmetrically fixedly connected to both sides of the clamping plate 16 on the other side. The connecting rods 17 are slidably connected to the limiting plate 12. A positioning plate 18 is threadedly connected to the surface of the screw rod 15. The positioning plate 18 is slidably connected to the limiting plate 12. The positioning plate 18 is fixedly connected to the connecting rod 17. The threads of the positioning plate 18 and the screw sleeve 19 are in opposite directions. A rubber ring 20 is fixedly connected to the side of the limiting plate 12 away from the fixing block 3.

[0029] The working principle and usage process of this utility model are as follows: When the puncture device is needed, the rubber ring 20 is attached to the surface of the skin to be punctured. Utilizing the special material properties of the rubber ring 20, the friction between the puncture device and the skin is increased, making it more stable during use. The puncture tube 2 is then installed inside the main body 1 of the puncture device, and then inserted into the fixing block 3. The toothed block 4 is pulled outwards, causing it to slide on the surface of the rotating shaft 9. The tension spring 11 is stretched until the toothed block 4 slides out from inside the toothed groove 10, releasing the restriction on the toothed block 4. Then, the toothed block 4 is rotated, which drives the bevel gear 8 to rotate via the rotating shaft 9. Several bevel gears 8 mesh with each other and drive the rubber wheel 6 to rotate inside the positioning groove 5 via the positioning rod 7. The rubber wheel 6 squeezes the puncture tube 2, thereby moving the puncture tube 2 downwards. Simultaneously, the puncture tube 2 moves... The depth of the puncture tube 2 can be determined by observing the scale mark 21 on its surface. The depth of the puncture tube 2 can be controlled by rotating the toothed block 4. When visibility is poor, the light 22 can be turned on to illuminate the scale mark 21. After reaching a certain depth, the force applied to the toothed block 4 is released. The tension spring 11 will pull the toothed block 4 into the tooth groove 10 due to its elastic potential energy, thus positioning the puncture tube 2. Since the puncture location is tricky, it is sometimes necessary to avoid certain things such as ribs, so it is necessary to insert at an angle. Rotating the knob 14 indirectly drives the two clamping plates 16 away from the positioning ball 13 through the screw 15, releasing the limit on the positioning ball 13, allowing the positioning ball 13 to rotate inside the limiting plate 12 until it rotates to the appropriate position. Then, rotating the knob 14 in the opposite direction causes the two clamping plates 16 to squeeze the positioning ball 13, thus limiting the positioning ball 13 and achieving rotation and locking of the puncture tube 2.

[0030] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A cannula trocar with controllable puncture depth, comprising a puncture device body (1) and a puncture tube (2) installed inside the puncture device body (1), characterized in that: It also includes a fixing block (3) disposed on the surface of the puncture tube (2). The fixing block (3) is sleeved on the surface of the puncture tube (2) and slidably connected to the puncture tube (2). The fixing block (3) has a positioning groove (5) inside. Several rubber wheels (6) are evenly disposed inside the positioning groove (5). Two positioning rods (7) are symmetrically fixedly connected to both ends of each rubber wheel (6). A bevel gear (8) is fixedly connected to the end of each positioning rod (7) away from the rubber wheel (6). Each bevel gear (8) is meshed. A rotating shaft (9) is fixedly connected to the surface of one of the bevel gears (8). The rotating shaft (9) passes through the surface of the fixing block (3) and is rotatably connected to the fixing block (3).

2. The cannula trocar with controllable puncture depth according to claim 1, characterized in that: The surface of the fixing block (3) is provided with a toothed groove (10), and a toothed block (4) is provided inside the toothed groove (10). The toothed block (4) is slidably connected to the fixing block (3) through the toothed groove (10). One end of the rotating shaft (9) away from the bevel gear (8) is inserted into the toothed block (4) and slidably connected thereto. A tension spring (11) is provided inside the toothed block (4), and the two ends of the tension spring (11) are fixedly connected to the toothed block (4) and the rotating shaft (9) respectively.

3. The cannula trocar with controllable puncture depth according to claim 1, characterized in that: A lamp (22) is mounted on the surface of the fixing block (3) via a mounting base, and a ruler (21) is fixedly connected to the surface of the puncture tube (2).

4. The cannula trocar with controllable puncture depth according to claim 2, characterized in that: A limiting plate (12) is provided below the fixing block (3), and a positioning ball (13) is rotatably connected inside the limiting plate (12). The puncture tube (2) passes through the positioning ball (13) and is rotatably connected to it.

5. A cannula trocar with controllable puncture depth according to claim 4, characterized in that: The limiting plate (12) has two symmetrically arranged clamping plates (16) inside. The clamping plates (16) are slidably connected to the limiting plate (12). The adjacent sides of the two clamping plates (16) are in contact with the positioning ball (13). A threaded sleeve (19) is fixedly connected to the side of one of the clamping plates (16) away from the positioning ball (13). A screw rod (15) is threadedly connected inside the threaded sleeve (19). The screw rod (15) passes through the limiting plate (12) and is connected to the limiting plate. (12) Rotary connection, the end of the screw (15) away from the screw sleeve (19) is fixedly connected to a knob (14), and two connecting rods (17) are symmetrically fixedly connected to both sides of the clamp (16) on the other side. The connecting rod (17) and the limiting plate (12) are slidably connected. The surface of the screw (15) is threadedly connected to a positioning plate (18). The positioning plate (18) and the limiting plate (12) are slidably connected. The positioning plate (18) and the connecting rod (17) are fixedly connected.

6. A cannula trocar with controllable puncture depth according to claim 5, characterized in that: The threads of the positioning plate (18) and the screw sleeve (19) are in opposite directions.

7. A cannula trocar with controllable puncture depth according to claim 6, characterized in that: A rubber ring (20) is fixedly connected to the side of the limiting plate (12) away from the fixing block (3).

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