A traction mechanism suitable for a cervical vertebra traction device and a cervical vertebra traction device

Abstract

The utility model relates to a traction mechanism suitable for cervical vertebra tractor, including gear box, still including the big gear, pinion, winding rope wheel in the gear box, gear box and pinion rotatoryly connected, gear box and big gear rotatoryly connected, the meshing connection of driving rotation pinion and big gear, big gear and winding rope wheel synchronous rotation connection, winding rope wheel winding type connection a traction rope, traction rope extends gear box outside, set up one -way rotation structure between big gear and gear box, one -way rotation structure is used for control traction rope reeling traction effort under the condition big gear only rotates along first direction, the condition big gear can rotate along second direction under the condition of reeling off, one of first direction and second direction is clockwise direction, and the other is counterclockwise direction. Still relate to a cervical vertebra tractor. The utility model more accurately control traction degree, convenient operation uses, belong to medical instrument technical field.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a traction mechanism and a cervical traction device suitable for cervical traction. Background Technology

[0002] CN217697000U discloses a cervical traction device, including a main body. An adjusting rod is threaded to the rear end of the main body, and a soft rubber pad is fixedly connected to the front end of the adjusting rod. A rotating shaft is rotatably connected to the center of the interior of a fixed housing. Gears are rotatably connected to both sides of the interior of the fixed housing, operating on the principle of a ratchet assembly. A connecting rope is connected to the surface of the rotating shaft. The fixed housing and the rotating shaft are rotatably connected via a support column. A first movable plate is rotatably connected to the surface of the support column, and a telescopic rope is rotatably connected to the surface of the support column. A second movable plate is rotatably connected to the lower end of the fixed housing, and a retraction rope is fixedly connected to the upper end of the second movable plate. The first movable plate can be pulled by the traction rope to achieve traction on the connecting rope. The cervical traction device generates traction force to gradually stretch the patient's cervical spine. One end of the traction rope is connected to a head support. By manually pulling the traction rope, an upward traction force is gradually generated, pulling the cervical spine, helping to adjust the intervertebral space and reduce pressure on the cervical spine. The cervical traction device needs to be clamped to the wall. The principle of the traction rope pulling the cervical spine upward and unloading the force downward is mainly achieved by the ratchet assembly rotating in the desired direction and restricting it in the opposite direction. The rope pulling force and the rope unloading force are in opposite rotation directions.

[0003] However, the above-mentioned existing technology has the following disadvantages: (1) It is difficult to control the traction force accurately by manually pulling the traction rope to perform neck traction, and it is easy to have insufficient or excessive traction force, which will affect the treatment effect; (2) When unloading force, it is necessary to pull the unloading rope by hand to open the stop valve. When the cervical spine is under tension, it is easy to cause secondary damage to the cervical spine. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the purpose of this utility model is to provide a traction mechanism and cervical traction device suitable for cervical traction devices, which can more accurately control the traction force and facilitate operation and use.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A traction mechanism for a cervical traction device includes a gearbox, a large gear, a small gear, and a rope reel located within the gearbox. The gearbox is rotatably connected to the small gear and the large gear. The small gear, which actively drives the rotation, meshes with the large gear. The large gear and the rope reel rotate synchronously. A traction rope is wound around the rope reel and extends out of the gearbox. A one-way rotation structure is provided between the large gear and the gearbox. This one-way rotation structure controls the large gear to rotate only in a first direction when the traction rope is being pulled up and the force is increased, and to rotate in a second direction when the rope is being unloaded. One of the first and second directions is clockwise, and the other is counterclockwise.

[0007] As a preferred embodiment, the unidirectional rotation structure includes a lock seat, a locking pin, a safety slide switch, a spring, and multiple raised inclined guide surfaces on the side of the large gear. One end of the spring is installed in a hole in the lock seat, and the locking pin inside the gearbox is fixedly connected to the other end of the spring, while the locking pin is slidably connected to the lock seat. The safety slide switch is installed on the gearbox and is slidably connected to the gearbox. The multiple inclined guide surfaces are evenly distributed along the central axis of the large gear, and the multiple inclined guide surfaces have the same orientation along the circumference. The locking pin is engaged with the side of the inclined guide surface under the elastic action of the spring, or the locking pin is disengaged from the inclined guide surface when the safety slide switch is pushed away from the large gear by an external force.

[0008] As a preferred embodiment, the safety slide switch includes a sliding part and a pushing part, with the sliding part fixedly connected to the pushing part below it; a groove is formed on the gearbox, with the sliding part slidably connected to the groove, and the pushing part passing through the groove; the locking pin includes a spring connecting section, a sliding section, and a locking section connected in sequence, with the locking section locking onto the side of the inclined guide surface, the sliding section slidably connected to the hole of the lock seat, the cross-sectional dimension of the sliding section being larger than that of the locking section, and the pushing part of the safety slide switch being located on the side of the sliding section of the locking pin closer to the locking section.

[0009] As a preferred embodiment, the traction mechanism also includes a rotating handle, which is synchronously connected to a pinion gear.

[0010] As a preferred embodiment, the gearbox includes a housing and a cover, which are fixedly connected by a screw; the traction mechanism also includes a rotating shaft, which is rotatably connected to the housing, fixedly connected to a pinion, fixedly connected to a rotating handle via a coupling, and rotatably connected to the cover.

[0011] As a preferred embodiment, the large gear is coaxially connected to the winding reel, the large gear has at least two pins on its side, and the winding reel has at least two pin holes on its side, with the pins and corresponding pin holes being interference-fitted.

[0012] As a preferred option, the gearbox is provided with a mounting bracket for mounting the cervical traction device.

[0013] As a preferred option, the cross-section of the rope groove of the rope winding wheel is an isosceles trapezoid, and the space of the rope groove gradually increases from the center of the rope winding wheel outward.

[0014] As a preferred embodiment, the traction mechanism also includes a rope locking buckle, which is located on the outside of the rope winding wheel. A through hole is provided on the side of the rope winding wheel, which communicates with the rope winding groove. One end of the traction rope passes through the through hole and is fixedly connected to the rope locking buckle.

[0015] A cervical traction device includes a traction mechanism suitable for cervical traction; a fixation mechanism on which the traction mechanism is mounted; and a traction frame connected to a traction rope, the lower traction frame being used to support the patient's neck.

[0016] This utility model has the following advantages:

[0017] (1) The traction mechanism adopts a double-gear structure, with the small gear meshing with the large gear. The large gear is coaxial and synchronously connected with the rope reel. When the small gear drives the large gear to rotate, the radius of the small gear is smaller than that of the large gear. Therefore, the small gear needs to rotate at a higher speed to maintain the same power output. In this case, the small gear needs to rotate faster, but the force required is smaller. The user can reduce resistance and save effort. The large gear can generate a larger torque, and the rotation speed of the large gear is slower than that of the small gear. The user can more easily perform the force application and tensioning of the traction neck and the force release operation. Through the precise design of the tooth ratio of the small gear and the large gear, the external force drives the small gear to rotate, and the large gear drives the rope reel, so as to achieve precise control of the traction force.

[0018] (2) By setting a double gear transmission structure, the structure is more compact and a larger reduction ratio is achieved in a smaller space, which helps to make the overall traction mechanism more compact.

[0019] (3) By setting a unidirectional rotation structure, the locking pin engages with the inclined guide surface on the side of the large gear. Under the elastic action of the spring, the locking pin is locked on the side of the inclined guide surface, so that when the rope is pulled up and the traction force is increased, the large gear can only rotate in one direction, preventing reverse rotation and preventing the traction rope from loosening in the opposite direction. When the rope is pulled up and the traction force is increased, the large gear rotates and the locking pin passes through each inclined guide surface in turn to produce a "click" sound, providing sound feedback to ensure that the operator can more sensitively perceive the gradual force increase process, better control the speed and force of the rope pulling force, prevent the traction force from increasing excessively or insufficiently, and effectively ensure the stability and safety of the traction force. There is no "click" sound when the force is released, reducing the operator's misoperation during use.

[0020] (4) This utility model can more effectively control the traction effect of the traction rope by setting a rotating handle to operate the traction rope to increase or decrease force, combined with double gear transmission; especially when the force is reduced in the opposite direction, when the external force pushes the safety sliding switch away from the large gear, it pushes the locking pin away from the inclined guide surface. When the large gear that is released from the lock pin restriction rotates in the opposite direction to reduce force, the operator holds the rotating handle to control the loosening speed of the traction rope, which can prevent the traction rope from suddenly reducing force and causing secondary injury to the cervical spine.

[0021] (5) The safety slide switch controls the rotation direction of the large gear by limiting or releasing the linkage between the limiting lock pin and the inclined guide surface, effectively controlling the force application or unloading, so that the large gear does not rotate in the opposite direction when applying force; and realizes the unloading operation in one step during use.

[0022] (6) The cross-section of the rope groove of the rope reel is an isosceles trapezoid, which limits the rope winding space and ensures that the traction rope maintains appropriate winding tension during operation, thereby reducing the occurrence of knots, entanglements, and displacement. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the traction mechanism of this utility model.

[0025] Figure 2 This is the front view of the traction mechanism of this utility model.

[0026] Figure 3 for Figure 2 AA sectional view.

[0027] Figure 4 Diagram showing the positional relationship between the safety slide switch and the locking pin.

[0028] Figure 5 This is a schematic diagram of the large gear.

[0029] Figure 6 This is a schematic diagram of the structure of the large gear from another angle.

[0030] Figure 7 This is a structural diagram of the box.

[0031] Figure 8 A schematic diagram of the assembly of the locking buckle and the traction rope.

[0032] Figure 9This is a schematic diagram of the rope reel.

[0033] The components are as follows: 1. Gearbox; 2. Housing; 3. Cover; 4. Large gear; 5. Small gear; 6. Rope reel; 7. Traction rope; 8. Lock seat; 9. Locking pin; 10. Safety slide switch; 11. Spring; 12. Inclined guide surface; 13. Sliding part; 14. Pushing part; 15. Slide groove; 16. Spring connecting section; 17. Sliding section; 18. Snap-fit ​​section; 19. Rotating handle; 20. Screw; 21. Rotating shaft; 22. Coupling; 23. Mounting base; 24. Rope groove; 25. Cylinder; 26. Set screw; 27. First bushing; 28. Second bushing; 29. ​​Third bushing; 30. Pin. Detailed Implementation

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

[0035] Example 1

[0036] like Figures 1 to 9As shown, a traction mechanism suitable for a cervical traction device includes a gearbox 1, a rotating handle 19, and further includes a large gear 4, a small gear 5, a rope winding wheel 6, a rotating shaft 21, a first bushing 27, a second bushing 28, and a third bushing 29 located within the gearbox 1. The gearbox 1 includes a housing 2 and a cover 3. A support shaft is provided inside the housing 2, and a threaded hole is formed inside the support shaft. The cover 3 has a first fixing hole. The housing 2 and the cover 3 are fixedly connected by a screw 20, which passes through the first fixing hole and is threadedly connected to the threaded hole. The cover 3 prevents dust and debris from entering and provides structural support. A second fixing hole is provided inside the housing 2, and a first bushing 27 is fitted inside the second fixing hole. The rotating shaft 21 is rotatably connected to the first bushing 27. The rotating shaft 21 passes through the center hole of the pinion 5 and is fixedly connected to the pinion 5. The housing cover 3 is provided with a stepped through hole. The second bushing 28 is fitted into the larger hole of the stepped through hole. The coupling 22 is fitted from the inside out into the second bushing 28 and is rotatably connected to the second bushing 28. The coupling 22 extends outward from the housing cover 3. The rotating shaft 21 is fixedly connected to the rotating handle 19 through the coupling 22. The rotating handle 19, located outside the gearbox 1, is fixedly connected to the coupling 22. The third bushing 29 is fitted onto the outside of the support shaft and passes through the central hole of the large gear 4, rotatably connecting the third bushing 29 and the large gear 4. The large gear 4 is coaxially connected to the rope winding wheel 6, and the large gear 4 and the rope winding wheel 6 rotate synchronously. The side of the large gear 4 is in close contact with the side of the rope winding wheel 6, and at least two pins 30 are provided on the side of the large gear 4. At least two pin holes are opened on the side of the rope winding wheel 6, and the pins 30 are inserted into the corresponding pin holes with an interference fit. The small gear 5, which drives the rotation, meshes with the large gear 4.

[0037] The first bushing 27, the second bushing 28, and the third bushing 29 all provide support and rotation guidance for the rotating components, ensuring stable operation.

[0038] The section of the rope groove 24 of the rope reel 6 is an isosceles trapezoid. The space of the rope groove 24 gradually increases from the center of the rope reel 6 outwards. The traction rope 7 is wound inside the rope groove 24. The rope groove 24 limits the winding space, so that the traction rope 7 maintains appropriate winding tension during operation, reducing the occurrence of knots, tangles, and displacement. The rope reel 6 is wound with a traction rope 7, which extends out of the housing 2. The rope reel 6 is used to wind the traction rope 7 and control the length of the traction rope 7 during traction. The traction mechanism also includes a rope locking buckle, located on the outside of the winding reel 6. A through hole is formed on the side of the winding reel 6, communicating with the winding groove 24. One end of the traction rope 7 passes through the through hole and is fixedly connected to the rope locking buckle. The rope locking buckle includes a cylinder 25 and a set screw 26. The outer diameter of the cylinder 25 is larger than the inner diameter of the through hole on the side of the winding reel 6, ensuring that the rope locking buckle, located on the outside of the winding reel 6, will not cause the traction rope 7 to detach from the winding reel 6. An internally threaded hole is formed on the side of the cylinder 25, and the set screw 26 is threaded into the internally threaded hole. One end of the traction rope 7 passes through the cylinder 25, and the set screw 26 is screwed into the cylinder 25 to tighten the traction rope 7. The rope locking buckle is used to fix the traction rope 7, preventing the rope from loosening and detaching from the winding reel during traction. A rope hole is formed at the bottom of the housing 2, and a copper sleeve is fitted inside the rope hole. The traction rope 7 passes through the copper sleeve, protecting the friction surface of the traction rope 7 during passage, reducing rope wear, and extending rope life.

[0039] A one-way rotation structure is provided between the large gear 4 and the gearbox 1. The one-way rotation structure is used to control the large gear 4 to rotate only in the first direction when the traction rope 7 is being pulled up and the force is being applied, and the large gear 4 can rotate in the second direction when the rope is being unloaded and the force is being applied. One of the first direction and the second direction is clockwise and the other is counterclockwise.

[0040] The unidirectional rotation structure includes a lock seat 8, a locking pin 9, a safety slide switch 10, a spring 11, and multiple raised inclined guide surfaces 12 on the side of the large gear 4. The lock seat 8 is installed inside the gearbox 1. One end of the spring 11 is installed in the hole of the lock seat 8, and the hole of the lock seat 8 is through-hole. One end of the spring 11 is fixed to the gearbox 1. The locking pin 9 inside the gearbox 1 is fixedly connected to the other end of the spring 11. The locking pin 9 is slidably connected to the hole of the lock seat 8. The lock seat 8 is used to install the locking pin 9, ensuring that the locking pin 9 can interact with the inclined guide surfaces 12 during the traction process. 2. Precise fit; The safety slide switch 10 is installed on the gearbox 1 and is slidably connected to the gearbox 1. Multiple inclined guide surfaces 12 are evenly distributed along the central axis of the large gear 4, and the multiple inclined guide surfaces 12 have the same orientation along the circumference. One side of the inclined guide surface 12 has raised trapezoidal teeth. Under the elastic action of the spring 11, the spring 11 pushes the locking pin 9 to be locked on the side of the inclined guide surface 12, that is, the locking pin 9 is locked in the raised trapezoidal teeth. Or when the external force pushes the safety slide switch 10 away from the large gear 4, it pushes the locking pin 9 to disengage from the inclined guide surface 12.

[0041] The safety slide switch 10 includes a sliding part 13 and a pushing part 14. The sliding part 13 is fixedly connected to the pushing part 14 below. A slide groove 15 is opened on the housing 2. The sliding part 13 is slidably connected to the slide groove 15, and the pushing part 14 passes through the slide groove 15. The locking pin 9 includes a spring connecting section 16, a sliding section 17 and a locking section 18 connected in sequence. The locking section 18 is locked on the side of the inclined guide surface 12. The sliding section 17 is slidably connected to the hole of the lock seat 8. The cross-sectional dimension of the sliding section 17 is larger than that of the locking section 18. The pushing part 14 of the safety slide switch 10 is located on the side of the sliding section 17 of the locking pin 9 closer to the locking section 18. When an external force pushes the safety slide switch 10 away from the large gear 4, the pushing part 14 of the safety slide switch 10 pushes the side of the sliding section 17 of the locking pin 9 to disengage the locking pin 9 from the inclined guide surface 12.

[0042] The gearbox 1 is equipped with mounting bases 23 for mounting on the cervical traction device, and two mounting bases 23 are installed on both sides of the gearbox 2.

[0043] When applying traction, the operator holds the handle 19 and rotates it in the first direction to gradually wind the traction rope 7 into the winding wheel 6. At this time, the operator judges and controls the speed of winding the traction rope 7 by listening for the "click" sound produced by the locking pin 9 as it passes through each inclined guide surface 12. When the traction force reaches the required level, the user can perform the unloading operation. When unloading the rope, the operator pushes the safety slide switch 10 away from the large gear 4, holds the sliding part 13 to keep the safety slide switch 10 in place, and releases the unloading restriction. The other hand turns the handle 19 in the second direction to slowly release the traction rope 7. After unloading is completed, the pushing force on the safety slide switch 10 is removed, and the spring 11 restores its elasticity, causing the locking pin 9 to spring back and lock onto the side of the inclined guide surface 12 to restrict the rotation of the large gear 4.

[0044] Example 2

[0045] A cervical traction device includes the traction mechanism of Embodiment 1; it also includes a fixation mechanism located above the patient's head, the traction mechanism being mounted on the fixation mechanism via a mounting base 23; and it also includes a traction frame connected to a traction rope 7, the lower traction frame being used to support the patient's neck.

[0046] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A traction mechanism suitable for cervical traction devices, characterized in that: The system includes a gearbox (1), a large gear (4), a small gear (5), and a rope reel (6) located inside the gearbox (1). The gearbox (1) is rotatably connected to the small gear (5), and the gearbox (1) is rotatably connected to the large gear (4). The small gear (5) that actively drives the rotation is meshed with the large gear (4). The large gear (4) is synchronously connected to the rope reel (6). The rope reel (6) is wound around a traction rope (7), which extends out of the gearbox (1). A one-way rotation structure is provided between the large gear (4) and the gearbox (1). The one-way rotation structure is used to control the large gear (4) to rotate only in the first direction when the traction rope (7) is pulled up and the force is increased, and the large gear (4) can rotate in the second direction when the rope is unloaded. One of the first direction and the second direction is clockwise, and the other is counterclockwise.

2. The traction mechanism for a cervical traction device according to claim 1, characterized in that: The one-way rotation structure includes a lock seat (8), a locking pin (9), a safety slide switch (10), a spring (11), and multiple raised inclined guide surfaces (12) on the side of the large gear (4); one end of the spring (11) is installed in the hole of the lock seat (8), the locking pin (9) in the gearbox (1) is fixedly connected to the other end of the spring (11), and the locking pin (9) is slidably connected to the lock seat (8); the safety slide switch (10) is installed on the gearbox (1), and the safety slide switch (10) is slidably connected to the gearbox (1); multiple inclined guide surfaces (12) are evenly distributed along the central axis of the large gear (4), and the multiple inclined guide surfaces (12) have the same orientation along the circumference; the locking pin (9) is stuck on the side of the inclined guide surface (12) under the elastic action of the spring (11), or when the external force pushes the safety slide switch (10) away from the large gear (4), the locking pin (9) is pushed away from the inclined guide surface (12).

3. The traction mechanism suitable for use in a cervical traction device as claimed in claim 2, wherein: The safety slide switch (10) includes a sliding part (13) and a pushing part (14). The sliding part (13) is fixedly connected to the pushing part (14) below. A groove (15) is opened on the gearbox (1). The sliding part (13) is slidably connected to the groove (15). The pushing part (14) passes through the groove (15). The locking pin (9) includes a spring connecting section (16), a sliding section (17) and a snap-fit ​​section (18) connected in sequence. The snap-fit ​​section (18) is snapped on the side of the inclined guide surface (12). The sliding section (17) is slidably connected to the hole of the lock seat (8). The cross-sectional dimension of the sliding section (17) is larger than that of the snap-fit ​​section (18). The pushing part (14) of the safety slide switch (10) is located on the side of the sliding section (17) of the locking pin (9) close to the snap-fit ​​section (18).

4. The traction mechanism suitable for use in cervical traction device as claimed in claim 1 wherein: The traction mechanism also includes a rotating handle (19), which is connected to the pinion (5) for synchronous rotation.

5. The traction mechanism suitable for use in a cervical traction device as claimed in claim 4, wherein: The gearbox (1) includes a housing (2) and a cover (3), which are fixedly connected by a screw (20); the traction mechanism also includes a rotating shaft (21), which is rotatably connected to the housing (2), and is fixedly connected to the pinion (5). The rotating shaft (21) is fixedly connected to the rotating handle (19) via a coupling (22), and the coupling (22) is rotatably connected to the cover (3).

6. The traction mechanism for a cervical traction device according to claim 1, characterized in that: The large gear (4) is coaxially connected to the rope winding wheel (6). At least two pins (30) are provided on the side of the large gear (4), and at least two pin holes are opened on the side of the rope winding wheel (6). The pins (30) are interference-fitted with the corresponding pin holes.

7. The traction mechanism suitable for use in cervical traction device as claimed in claim 1 wherein: A mounting base (23) for mounting on the cervical traction device is provided on the gearbox (1).

8. The traction mechanism suitable for use in cervical traction device as claimed in claim 1 wherein: The cross section of the rope groove (24) of the rope reel (6) is an isosceles trapezoid, and the space of the rope groove (24) gradually increases from the center of the rope reel (6) outward.

9. The traction mechanism for a cervical traction device according to claim 8, characterized in that: The traction mechanism also includes a rope lock buckle, which is located on the outside of the rope winding wheel (6). A through hole is opened on the side of the rope winding wheel (6), which is connected to the rope winding groove (24). One end of the traction rope (7) passes through the through hole and is fixedly connected to the rope lock buckle.

10. A cervical traction device characterized by: The device includes a traction mechanism suitable for a cervical traction device as described in any one of claims 1-9; it also includes a fixing mechanism on which the traction mechanism is mounted; and it also includes a traction frame connected to the traction rope (7), the lower traction frame being used to support the patient's neck.

Images