Device for cutting transverse carpal ligament

Abstract

The utility model discloses a device for cutting a transverse carpal ligament, which relates to the technical field of medical instruments and comprises a sheathing canal, a sleeve movably arranged in the sheathing canal, a crank-link mechanism arranged in the sleeve, a cutting head arranged at one end of the crank-link mechanism, and a connecting rod arranged at the other end of the cutting head. A push connecting rod is fixed to the end, away from the cutting tool bit, of the crank connecting rod mechanism, an adjusting knob is in threaded connection with the end, away from the crank connecting rod mechanism, of the push connecting rod, and the adjusting knob is rotationally arranged in the sleeve. When a ligament is cut, the angle of the cutting tool bit exposed out of the sleeve is controlled by controlling the number of turns of rotation of the adjusting knob and controlling the angle of the cutting tool bit exposed out of the sleeve, so that the ligament can be conveniently cut, and the ligament can be conveniently cut. And therefore, the wrist strap can be better cut.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially relates to a cutting wrist transverse ligament device. BACKGROUND

[0002] Carpal tunnel syndrome is the most common one of peripheral nerve compression syndrome, and is a disease caused by compression of median nerve at the wrist. Due to the compression of the median nerve at the wrist, the thumb, index finger and middle finger are painful and numb, and severe cases can appear bluish thumb, index finger, finger tip necrosis or atrophic ulcer, and the current treatment methods are mainly conservative treatment and surgical treatment.

[0003] The existing cutting technology of wrist transverse ligament is to make a small incision on the palm side of the wrist, then insert the sheath pipe with the first slot into the wrist along the small incision, then insert the hook knife into the wrist along the sheath pipe, finally, the hook knife is exposed from the first slot and contacts the wrist transverse ligament and moves the hook knife along the first slot, the cutting of the wrist transverse ligament is completed, the existing technology has the disadvantages that the angle of the hook knife exposed from the first slot is difficult to control, resulting in that the ideal cutting effect is difficult to achieve when the hook knife is pulled to cut the wrist transverse ligament, and secondly, the existing cutting technology is troublesome, therefore we propose a cutting wrist transverse ligament device to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model provides a cutting wrist transverse ligament device, solves the current cutting cutting device and has the technical problem of poor cutting effect of wrist transverse ligament.

[0005] In order to solve the above technical problems, the utility model provides a cutting wrist transverse ligament device, which comprises a sheath pipe, a sleeve pipe movably arranged in the sheath pipe, a crank connecting rod mechanism arranged in the sleeve pipe, a cutting knife head arranged at one end of the crank connecting rod mechanism, a push connecting rod fixed at the end of the crank connecting rod mechanism away from the cutting knife head, an adjusting knob threadedly connected at the end of the push connecting rod away from the crank connecting rod mechanism, and the adjusting knob is rotationally arranged in the sleeve pipe.

[0006] Preferably, the crank connecting rod mechanism comprises a crank disc, the crank disc is rotationally arranged in the sleeve pipe, the cutting knife head is fixed on the side of the crank disc, a connecting plate is hinged on the side of the crank disc away from the cutting knife head, a piston is hinged at the end of the connecting plate away from the crank disc, the end of the piston away from the connecting plate is fixedly connected with the push connecting rod, a sleeve is sleeved on the piston, and the sleeve is fixed in the sleeve pipe.

[0007] The technical scheme is as follows: the crank connecting rod mechanism comprises a crank disc, the crank disc is rotationally arranged in the sleeve, the cutting tool head is fixed on the side of the crank disc, a connecting plate is hingedly arranged on the side of the crank disc away from the cutting tool head, a piston is hingedly arranged on the end of the connecting plate away from the crank disc, the piston is fixedly connected with the push connecting rod on the end away from the connecting plate, a sleeve is arranged on the piston, the sleeve is fixed in the sleeve, in actual operation, the adjusting knob is rotated, the adjusting knob is rotated, the push connecting rod is horizontally axially moved, the piston is axially moved in the sleeve along the sleeve, then the piston moves the connecting plate, the connecting plate rotates the crank disc, the crank disc rotates the cutting tool head arranged on the crank disc, so that the cutting tool head is hidden and exposed from the sleeve.

[0008] Preferably, a scale disc is arranged between the adjusting knob and the sleeve, the scale disc is fixed on the sleeve, a pointer is fixed on the adjusting knob, and the pointer is attached to the scale disc.

[0009] The technical scheme is as follows: the scale disc is arranged between the adjusting knob and the sleeve, the scale disc is fixed on the sleeve, a pointer is fixed on the adjusting knob, and the pointer is attached to the scale disc, when the adjusting knob is rotated, the pointer fixed on the adjusting knob is also rotated, when the adjusting knob is adjusted to rotate, according to the angle of the pointer on the scale disc, the angle of the cutting tool head exposed from the sleeve can be known.

[0010] Preferably, a first slot is arranged on the sleeve, and two fixed plates are fixed on the two sides in the first slot, and the crank disc is rotationally fixed on the fixed plates.

[0011] The technical scheme is as follows: the first slot is arranged on the sleeve, the two fixed plates are fixed on the two sides in the first slot, and the crank disc is rotationally arranged on the fixed plates.

[0012] Preferably, a bearing is arranged on the end of the sleeve close to the adjusting knob, and the adjusting knob is fixed in the inner ring of the bearing.

[0013] The technical scheme is as follows: the bearing is arranged on the end of the sleeve close to the adjusting knob, and the adjusting knob is fixed in the inner ring of the bearing.

[0014] Preferably, the cutting tool head is arc-shaped.

[0015] The technical scheme is as follows: the cutting tool head is arc-shaped.

[0016] Preferably, anti-skid lines are arranged on the adjusting knob.

[0017] The technical scheme is as follows: the anti-skid lines are arranged on the adjusting knob.

[0018] Preferably, a second slot is formed on the sheath, and a width of the second slot is matched with a width of the cutting head.

[0019] By forming the second slot on the sheath and matching the width of the second slot with the width of the cutting head, the cutting head does not swing when moving in the second slot.

[0020] Preferably, a positioning component is arranged between the sheath and the sleeve, the positioning component comprises a positioning block and a positioning slot, the positioning block is fixed on the sleeve, the positioning slot is arranged on the sheath, the positioning block is on the same axis line as the cutting head, and the positioning slot is on the same axis line as the second slot.

[0021] By arranging the positioning component between the sheath and the sleeve, the positioning component comprises the positioning block and the positioning slot, the positioning block is fixed on the sleeve, the positioning slot is arranged on the sheath, the positioning block is on the same axis line as the cutting head, and the positioning slot is on the same axis line as the second slot, so that the cutting head is just in the second slot when the cutting head is exposed.

[0022] Preferably, a scale line is arranged on the sleeve.

[0023] By arranging the scale line on the sleeve, the depth of the sleeve inserted into the sheath and the distance of the sleeve pulled out of the sheath can be known.

[0024] Compared with the related art, the wristband cutting device has the following beneficial effects:

[0025] 1. Compared with the traditional wristband cutting device, the wristband cutting device is provided with the adjusting knob, the push connecting rod, the crank connecting rod mechanism and the cutting head, in actual operation, the adjusting knob is rotated to move the push connecting rod connected with the adjusting knob in screw thread, and then the crank connecting rod mechanism is moved to expose the cutting head fixed on the crank connecting rod mechanism or hide the cutting head in the sleeve, before the sleeve is inserted into the ligament to be cut, the cutting head is hidden in the sleeve, when the ligament is cut, the rotation number of the adjusting knob is controlled to control the angle of the cutting head exposed on the sleeve, and then the wristband is better cut.

[0026] 2. In the wristband cutting device, the pointer is fixed on the adjusting knob by arranging the index plate, the rotation number and the rotation angle of the adjusting knob can be clearly known, and then the angle of the cutting head exposed on the sleeve can be more clearly known, and the cutting effect on the wristband is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1A schematic diagram of a device for cutting the transverse carpal ligament;

[0028] Figure 2 A structural diagram showing the exposed cutting head in a device for cutting the transverse carpal ligament;

[0029] Figure 3 This is a structural diagram of a device for cutting the transverse carpal ligament where the cutting blade is hidden.

[0030] Figure 4 A cross-sectional view of the disassembled structure of a device for cutting the transverse carpal ligament;

[0031] Figure 5 This is a schematic diagram of the sheath, sleeve, and positioning components in a device for cutting the transverse carpal ligament.

[0032] Figure 6 This is a schematic diagram showing the separation of the sheath and sleeve in a device for cutting the transverse carpal ligament.

[0033] The following are the labels in the diagram: 1. Sleeve; 10. Sheath; 11. First groove; 12. Second groove; 13. Scale line; 2. Adjustment knob; 21. Anti-slip texture; 22. Pointer; 3. Indexing plate; 4. Push rod; 5. Crank-connecting rod mechanism; 51. Crank disc; 52. Connecting plate; 53. Piston; 54. Sleeve; 6. Cutting head; 7. Fixing plate; 8. Bearing; 9. Positioning component; 91. Positioning block; 92. Positioning groove. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0035] Example 1

[0036] like Figures 1-4 As shown, a device for cutting the transverse carpal ligament includes a sheath 10, a sleeve 1 movably disposed within the sheath 10, a crank-connecting rod mechanism 5 disposed within the sleeve 1, a cutting head 6 disposed at one end of the crank-connecting rod mechanism 5, a pushing connecting rod 4 fixed at the end of the crank-connecting rod mechanism 5 away from the cutting head 6, and an adjusting knob 2 threadedly connected to the end of the pushing connecting rod 4 away from the crank-connecting rod mechanism 5. The adjusting knob 2 is rotatably disposed within the sleeve 1.

[0037] The adjustment knob 2, push linkage 4, crank-connecting rod mechanism 5, and cutting head 6 are all connected in operation. By rotating the adjustment knob 2, the push linkage 4, which is threadedly connected to the adjustment knob 2, moves, thereby driving the crank-connecting rod mechanism 5 to move. This causes the cutting head 6, which is fixed on the crank-connecting rod mechanism 5, to be exposed and hidden inside the sleeve 1. After the cutting head 6 is hidden, the sleeve 1 is inserted into the sheath 10. Since the sheath 10 is inserted into the ligament to be cut, once the sleeve 1 is in place, the adjustment knob 2 is controlled to expose the cutting head 6. At this point, the sleeve 1 is pulled out from the sheath 10, and the cutting head 6 can then cut the ligament. When cutting the ligament, the angle at which the cutting head 6 is exposed on the sleeve 1 is controlled by controlling the number of rotations of the adjustment knob 2, thereby achieving better cutting of the wristband.

[0038] Example 2

[0039] like Figures 1-4 As shown, the crank-connecting rod mechanism 5 includes a crank disc 51, which is rotatably mounted inside the sleeve 1. The cutting head 6 is fixed to the side of the crank disc 51. A connecting plate 52 is hinged to the side of the crank disc 51 away from the cutting head 6. A piston 53 is hinged to the end of the connecting plate 52 away from the crank disc 51. The end of the piston 53 away from the connecting plate 52 is fixedly connected to the push connecting rod 4. A sleeve 54 is sleeved on the piston 53 and fixed inside the sleeve 1. In actual operation, the adjusting knob 2 is rotated, which causes the push connecting rod 4 to move horizontally, thereby pushing the piston 53 to move along the axial direction of the sleeve 54 inside the sleeve 54. Then, the piston 53 pushes the connecting plate 52 to move, and the connecting plate 52 pushes the crank disc 51 to rotate. The rotation of the crank disc 51 drives the cutting head 6 mounted on the crank disc 51 to rotate, thereby achieving the concealment of the cutting head 6 and the exposure of the sleeve 1.

[0040] A scale 3 is provided between the adjusting knob 2 and the sleeve 1. The scale 3 is fixed on the sleeve 1. A pointer 22 is fixed on the adjusting knob 2. The pointer 22 is in contact with the scale 3. When the adjusting knob 2 is rotated, the pointer 22 fixed on the adjusting knob 2 also rotates. When the adjusting knob 2 is rotated, the angle of the cutting head 6 exposed on the sleeve 1 can be known according to the angle pointed to by the pointer on the scale.

[0041] A bearing 8 is provided at one end of the sleeve 1 near the adjusting knob 2. The adjusting knob 2 is fixed in the inner ring of the bearing 8, which facilitates the rotation and adjustment of the adjusting knob 2.

[0042] The sleeve 1 has a first slot 11, which allows the cutting head 6 to protrude from the sleeve 1. Fixing plates 7 are fixed on both sides inside the first slot 11. The crank disc 51 is rotatably mounted on the fixing plate 7. By installing the fixing plate 7 at the first slot 11, the crank disc 51 is placed inside the sleeve 1. The cutting head 6 is arc-shaped, which makes it easier to cut ligaments. The adjustment knob 2 has anti-slip texture 21, so that the fingers will not slip when rotating the adjustment knob 2.

[0043] Example 3

[0044] Based on Embodiment 1 or Embodiment 2, such as Figures 5-6 As shown, the sheath 10 has a second groove 12, the width of which is adapted to the width of the cutting head 6. The sheath 10 is inserted along the palm incision to the ligament to be cut. The sleeve 1 is inserted into the sheath 10. When the sleeve 1 is fully inserted into the sheath 10, the cutting head 6 is exposed. The sleeve 1 is pulled out of the sheath 10. At this moment, the cutting head 6 moves along the second groove 12 on the sheath 10. When the width of the second groove 12 is adapted to the width of the cutting head 6, the movement of the cutting head 6 in the second groove 12 will be more stable and will not swing.

[0045] like Figures 5-6 As shown, the sleeve 1 is provided with a scale line 13. When the sleeve 1 is inserted into the sheath 10, or when the sleeve 1 is pulled out of the sheath 10, the scale line 13 on the sleeve 1 can clearly show the depth of the sleeve 1 inserted into the sheath 10 and the distance the sleeve 1 is pulled out of the sheath 10.

[0046] like Figures 5-6 As shown, a positioning component 9 is provided between the sheath 10 and the sleeve 1. The positioning component 9 includes a positioning block 91 and a positioning groove 92 that engages with the positioning block 91. The positioning block 91 is fixed on the sleeve 1, and the positioning groove 92 is provided on the sheath 10. The positioning block 91 and the cutting head 6 are on the same axis, and the positioning groove 92 and the second groove 12 are on the same axis, so that when the sleeve 1 is inserted into the sheath 10, the cutting head 6 can be accurately exposed in the second groove 12 on the sheath 10.

[0047] Working principle: such as Figures 1-4As shown, in actual operation, the adjusting knob 2 is rotated, the adjusting knob 2 is rotated, the push rod 4 is horizontally and axially moved, the piston 53 is axially moved in the sleeve 54, the piston 53 pushes the connecting plate 52 to move, the connecting plate 52 drives the crank disc 51 to rotate, the crank disc 51 drives the cutting head 6 arranged on the crank disc 51 to rotate, thereby realizing the hiding, exposing and extending angle on the sleeve 1 of the cutting head 6.

[0048] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An apparatus for cutting the transverse ligament of the wrist comprising a sheath (10) characterized in that, The sheath (10) is movably provided with a sleeve (1), a crank connecting rod mechanism (5) is arranged in the sleeve (1), a cutting knife head (6) is arranged at one end of the crank connecting rod mechanism (5), a pushing connecting rod (4) is fixed at the end of the crank connecting rod mechanism (5) away from the cutting knife head (6), and an adjusting knob (2) is threadedly connected at the end of the pushing connecting rod (4) away from the crank connecting rod mechanism (5).

2. The device of claim 1, wherein, The crank connecting rod mechanism (5) comprises a crank disc (51) which is rotatably arranged in the sleeve (1), the cutting knife head (6) is fixed on the side of the crank disc (51) away from the cutting knife head (6), a connecting plate (52) is hingedly arranged on the side of the crank disc (51) away from the cutting knife head (6), a piston (53) is hingedly arranged at the end of the connecting plate (52) away from the crank disc (51), the piston (53) is fixedly connected with the pushing connecting rod (4) at the end of the piston (53) away from the connecting plate (52), and a sleeve (54) is arranged on the piston (53) and fixed in the sleeve (1).

3. The device of claim 1, wherein the device is configured to cut the transverse ligament of the wrist. A protractor (3) is arranged between the adjusting knob (2) and the sleeve (1), the protractor (3) is fixed on the sleeve (1), a pointer (22) is fixed on the adjusting knob (2), and the pointer (22) is in contact with the protractor (3).

4. The device of claim 2, wherein the device is configured to cut the transverse ligament of the wrist. A first notch (11) is formed in the sleeve (1), and two fixed plates (7) are fixed on both sides of the first notch (11), and the crank disc (51) is rotatably arranged on the fixed plates (7).

5. The device of claim 1, wherein the device is configured to cut the transverse ligament of the wrist. A bearing (8) is arranged at the end of the sleeve (1) close to the adjusting knob (2), and the adjusting knob (2) is fixed in the inner ring of the bearing (8).

6. The device of claim 1, wherein, The cutting knife head (6) is arc-shaped.

7. The device of claim 1, wherein the device is configured to cut the transverse ligament of the wrist. Anti-skid lines (21) are formed on the adjusting knob (2).

8. The device of claim 1, wherein, A second notch (12) is formed in the sheath (10), and the width of the second notch (12) is matched with the width of the cutting knife head (6).

9. The device of claim 1, wherein, A positioning component (9) is arranged between the sheath (10) and the sleeve (1), the positioning component (9) comprises a positioning block (91) and a positioning groove (92) which is in engagement with the positioning block (91), the positioning block (91) is fixed on the sleeve (1), the positioning groove (92) is arranged on the sheath (10), the positioning block (91) is on the same axis line as the cutting knife head (6), and the positioning groove (92) is on the same axis line as the second notch (12).

10. The device of claim 1, wherein, Scale lines (13) are arranged on the sleeve (1).

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