Ultrasonic osteotome head with adjustable limiting piece and ultrasonic osteotome
By employing a ratchet structure and a push-tooth spring design on the ultrasonic bone scalpel tip, the problem of inaccurate cutting depth caused by vibration loosening of the limiting component is solved, thus achieving safer ultrasonic bone scalpel surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-04-03
AI Technical Summary
The limiting components of traditional ultrasonic bone scalpels are prone to loosening due to vibration, which can lead to an unexpected increase in the maximum cutting depth at the tip of the scalpel, resulting in lower safety.
An ultrasonic bone scalpel tip with an adjustable limiter is used. The limiter is stably installed through a ratchet structure. The engagement of the push-tooth spring and ratchet prevents accidental movement of the limiter and ensures the accuracy of the cutting depth.
It effectively prevents the maximum cutting depth at the tip of the blade from unexpectedly increasing, thus improving the safety and accuracy of the surgery.
Smart Images
Figure CN224070519U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ultrasonic bone scalpel technology, specifically to an ultrasonic bone scalpel tip and an ultrasonic bone scalpel with an adjustable limiting component. Background Technology
[0002] Ultrasonic bone scalpels, as dental surgical instruments, are widely used for cutting and drilling bone tissue. Traditional ultrasonic bone scalpel operation is highly dependent on the surgeon's experience. Experienced surgeons can precisely control the cutting depth with skillful techniques, ensuring the safety and accuracy of the surgery. Inexperienced surgeons, however, struggle to accurately control the cutting depth, easily damaging the patient's bone tissue by cutting too deeply. Currently, there is an ultrasonic bone scalpel tip with an adjustable limiting component. This tip has a laterally protruding limiting component installed at the front end of the tip body via a threaded structure. Before surgery, the surgeon adjusts the front-to-back position of the limiting component by rotating it, thereby adjusting the maximum cutting depth of the tip. During surgery, when the tip body cuts into the bone tissue and reaches the set maximum cutting depth, the limiting component stops at the edge of the incision, preventing the tip body from advancing further, thus achieving effective control of the cutting depth. However, in actual surgery, the threaded structure is prone to loosening due to vibration, causing the limiting component to move unexpectedly backward, resulting in an unexpectedly large maximum cutting depth at the tip end. Therefore, this type of ultrasonic bone scalpel has lower safety. Utility Model Content
[0003] The technical problem this invention aims to solve is to provide an ultrasonic bone scalpel tip with an adjustable limiting component. This limiting component is less prone to accidental backward movement due to vibration, effectively preventing an unexpected increase in the maximum cutting depth at the tip's front end, thus ensuring higher safety. This invention also provides an ultrasonic bone scalpel whose limiting component is less prone to accidental backward movement due to vibration, effectively preventing an unexpected increase in the maximum cutting depth at the tip's front end, thus ensuring higher safety.
[0004] To solve the above-mentioned technical problems, the present invention provides an ultrasonic bone scalpel tip with an adjustable limiting component, comprising a scalpel body, a laterally protruding limiting component movably mounted at the front end of the scalpel body, the limiting component being able to move back and forth along the scalpel body to adjust the maximum cutting depth at the front end of the scalpel body, a first ratchet tooth being provided on the front side wall of the scalpel body, the limiting component comprising a limiting component body, a second ratchet tooth and a push-tooth spring being mounted on the limiting component body, the push-tooth spring pushing the second ratchet tooth toward the first ratchet tooth to make the second ratchet tooth engage with the first ratchet tooth, thereby preventing the limiting component body from moving backward along the scalpel body due to the first ratchet tooth, the second ratchet tooth having an exposed operating part for operation, the second ratchet tooth being operated to overcome the elastic force of the push-tooth spring and release from engagement with the first ratchet tooth, the limiting component body is no longer blocked by the first ratchet tooth and can move back and forth along the scalpel body.
[0005] Furthermore, the limiting component body is specifically a limiting sleeve, which is sleeved on the outside of the cutter head body. The second ratchet and push tooth spring are installed inside the limiting sleeve. An operating hole is opened on the side wall of the limiting sleeve, and the operating part of the second ratchet extends outward from the operating hole to the outside of the limiting sleeve.
[0006] Furthermore, the operating part of the second ratchet extends out of the limiting sleeve in a direction away from the first ratchet. When it is pulled outward, the second ratchet moves away from the first ratchet, thereby disengaging the second ratchet from the first ratchet.
[0007] Furthermore, the operating part of the second ratchet is a cylindrical shape that extends axially outward, and its sidewall is radially recessed to form at least two gripping grooves, which are inserted by at least two fingers to grip the operating part together.
[0008] Furthermore, the end of the operating part of the second ratchet is hemispherical.
[0009] Furthermore, the limiting sleeve extends forward to the front of the first and second ratchet teeth and extends laterally inward to have a stop block for blocking foreign objects and preventing them from entering the limiting sleeve.
[0010] Furthermore, the stop block also functions as a lateral positioning block, contacting the front side wall of the cutter head body to laterally position the limiting sleeve.
[0011] Furthermore, the front side wall of the cutter head body is provided with multiple scale lines arranged in parallel.
[0012] Furthermore, the limiting component also serves as a lamp holder, with a lamp mounting section at the rear end of the limiting component body for installing lighting fixtures; lighting fixtures are installed on the lamp mounting section.
[0013] The ultrasonic bone scalpel includes a main unit, a handle and a foot switch connected to the main unit, and an ultrasonic bone scalpel head installed at the front end of the handle, as described above.
[0014] The ultrasonic bone scalpel tip of this invention features a limiting member that is movably mounted to the tip body via a ratchet. A pusher spring pushes the second ratchet towards the first ratchet, causing the second ratchet to engage with the first ratchet. This prevents the limiting member from moving backward along the tip body due to the first ratchet's obstruction. Even if the ultrasonic bone scalpel tip vibrates during surgery, the second ratchet will remain engaged with the first ratchet under the pusher spring's pressure. Therefore, the limiting member is less likely to move backward accidentally due to vibration, effectively preventing the maximum cutting depth at the tip body from unexpectedly increasing, thus ensuring high safety. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of an ultrasonic bone scalpel.
[0016] Figure 2This is a schematic diagram of the handle and the ultrasonic bone scalpel head.
[0017] Figure 3 This is an exploded view of the front end of the cutter head and the limiting component.
[0018] Figure 4 This is a cross-sectional view of the front end of the cutter head body and the limiting component. In the figure, the second ratchet is engaged with the first ratchet that is further forward.
[0019] Figure 5 This is a cross-sectional view of the front end of the cutter head body and the limiting component. In the figure, the second ratchet is disengaged from the first ratchet located further forward.
[0020] Figure 6 This is a cross-sectional view of the front end of the cutter head body and the limiting component. In the figure, the second ratchet tooth faces the rearward first ratchet tooth.
[0021] Figure 7 This is a cross-sectional view of the front end of the cutter head body and the limiting component. In the figure, the second ratchet is engaged with the rearmost first ratchet.
[0022] Figure 8 This is a cross-sectional view of the front end of the cutter head body and the limiting component. In the figure, the second ratchet moves forward along the tooth surface of the first ratchet. The pusher spring is omitted in the figure. Detailed Implementation
[0023] The present invention will be further described in detail below with reference to specific embodiments.
[0024] Ultrasonic bone scalpel Figure 1 The device includes a main unit 1, a handle 2 and a foot switch 3 connected to the main unit 1, and an ultrasonic bone scalpel head 4 mounted on the front end of the handle 2. During surgery, the surgeon holds the handle 2 and moves the ultrasonic bone scalpel head 4 to the target position in the patient's mouth. Then, the surgeon uses the foot switch 3 to control the main unit 1 to send ultrasonic energy to the handle 2, driving the ultrasonic bone scalpel head 4 to cut the bone tissue in the patient's mouth. See [link / description]. Figure 2 The ultrasonic bone scalpel head 4 includes a head body 5, with its rear end 52 mounted on a handle 2. A laterally protruding limiting member 6 is movably mounted on the front end 51 of the head body 5. The limiting member 6 can move back and forth along the head body 5. Nine parallel graduation lines 53 are provided on the side wall of the front end 51 of the head body 5 (six graduation lines 53 are shown as dashed lines in the figure). Before surgery, the surgeon moves the limiting member 6 along the head body 5 until its front end 601 moves to the target graduation line 53. That is, the maximum cutting depth of the front end 51 of the head body 5 is adjusted by adjusting the position of the limiting member 6. During surgery, when the front end 51 of the head body 5 cuts into the bone tissue and reaches the set maximum cutting depth, the front end 601 of the limiting member 6 blocks the edge of the incision, preventing the head body 5 from advancing further, thereby achieving effective control of the cutting depth.
[0025] See Figure 3 and Figure 4 The cutter head body 5 has 15 first ratchet teeth 54 arranged in parallel on the left side wall of the front end 51. The limiting member 6 includes a limiting member body 61, which is a metal limiting sleeve 61, including a "door"-shaped limiting sleeve body 618 with an opening 6180 facing right and a snap-fit plate 619. The limiting sleeve body 618 is fitted onto the outside of the front end 51 of the cutter head body 5 to the right. A buckle 6181 protrudes to the right at its opening 6180. The snap-fit plate 619 is installed at the opening 6180 and has a slot 6191. The buckle 6181 snaps into the slot 6191 to the right. The limiting sleeve body 618 and the snap-fit plate 619 are snapped together in this way. The limiting sleeve 61 is detachably installed on the front end 51 of the cutter head body 5 and can be removed from the front end 51 of the cutter head body 5. A door-shaped ratchet block 62 with its opening facing right is installed inside the limiting sleeve 61. The ratchet block 62 is fitted to the front end 51 of the cutter head body 5 with its right side having a second ratchet 66 arranged in parallel. The second ratchet 66 is located to the left of the first ratchet 54, facing the first ratchet 54. A push spring 63 is provided between the left wall 611 of the limiting sleeve 61 and the ratchet block 62. The spring pushes the ratchet block 62 to the right, thereby indirectly pushing the second ratchet 66 to the right towards the first ratchet 54, so that the second ratchet 66 engages with the first ratchet 54. In this state, because the second ratchet 66 on the ratchet block 62 is blocked by the first ratchet 54, the ratchet block 62 cannot move backward along the cutter head body 5. The left wall 611 of the limiting sleeve 61 has an operating hole 612. A cylindrical operating bar 64 extends axially to the left from the ratchet block 62. It extends axially to the left from the operating hole 612 to the outside of the limiting sleeve 61 and is indirectly connected to the second ratchet 66 via the ratchet block 62. As the exposed operating part of the second ratchet 66, its side wall is radially recessed to form two gripping grooves 641, and its left end 642 is hemispherical. Since the operating bar 64 is blocked at the operating hole 612 of the limiting sleeve 61, the limiting sleeve 61 cannot move back and forth relative to the operating bar 64. That is to say, the limiting sleeve 61, the operating bar 64, the ratchet block 62 and the second ratchet 66 move synchronously in the back and forth direction. Therefore, when the second ratchet 66 is engaged with the first ratchet 54, the limiting sleeve 61 is indirectly blocked by the first ratchet 54 via the operating bar 64, the ratchet block 62 and the second ratchet 66, and cannot move backward along the cutter head body 5. The front end 613 of the limiting sleeve 61 extends forward to the front side of the first ratchet 54 and the ratchet block 62. The snap-fit plate 619 serves as the right wall of the limiting sleeve 61, contacting the right wall of the front end 51 of the cutter head body 5. A lateral positioning block 614 extends to the right from the left wall 6132 of the front end 613 of the limiting sleeve 61. The lateral positioning block 614 contacts the left wall of the front end 51 of the cutter head body 5, and together with the right wall of the limiting sleeve 61, it provides lateral positioning for the limiting sleeve 61. Therefore, the limiting sleeve 61 cannot move left or right relative to the cutter head body 5. The distance between any two adjacent scale lines 53 is the same as the distance between any two adjacent first ratchet teeth 54. The front end 613 of the limiting sleeve 61 is located on the centrally located scale line 53.
[0026] See Figure 5 Before surgery, the doctor uses two fingers to grip the operating bar 64 in the two gripping slots 641, and then pulls the operating bar 64 to the left (i.e., outwards). This pulls the ratchet block 62 to the left, causing the ratchet block 62 and the second ratchet 66 to overcome the elastic force of the pusher spring 63 and move away from the first ratchet 54. This disengages the second ratchet 66 from the first ratchet 54. In this state, the limiting sleeve 61 and the ratchet block 62 are no longer obstructed by the first ratchet 54 and can move back and forth along the cutter head body 5. The doctor moves the limiting sleeve 61 and the ratchet block 62 back and forth along the cutter head body 5 until the front end 613 of the limiting sleeve 61 moves to the target scale line 53. This is how the maximum cutting depth of the front end 51 of the cutter head body 5 is adjusted. In this embodiment, the doctor moves the limiting sleeve 61 and the ratchet block 62 backward along the blade body 5 by a distance of 5 graduation lines 53, that is, moves the limiting sleeve 61, the operating bar 64, the pusher spring 63, the ratchet block 62, and the second ratchet 66 backward by a distance of 5 first ratchet teeth 54. In this state, see Figure 6 The second ratchet 66 is located to the left of the rearmost first ratchet 54. The doctor releases the operating bar 64, causing the ratchet spring 63 to push the ratchet block 62 to the right, indirectly pushing the second ratchet 66 to move to the right and reset, so that the second ratchet 66 engages with the rearmost first ratchet 54. In this state, see... Figure 7 The limiting sleeve 61 and ratchet block 62 are again blocked by the first ratchet 54 and cannot move backward along the blade body 5. After the doctor adjusts the maximum cutting depth of the front end 51 of the blade body 5, the ultrasonic bone scalpel is used for surgery. During the operation, the lateral positioning block 614 (see...) Figure 4 It also acts as a stop, blocking foreign objects such as bone fragments that may splash during surgery and preventing them from entering the limiting sleeve 61. Because the limiting component 6 and the blade body 5 are movably mounted via ratchet teeth 54 and 66, even if the ultrasonic bone scalpel blade 4 vibrates during surgery, the second ratchet tooth 66 will remain engaged with the first ratchet tooth 54 under the pushing force of the pusher spring 63. Therefore, the limiting sleeve 61 is less likely to move backward unexpectedly due to vibration, effectively preventing the maximum cutting depth of the blade body 5's front end 51 from unexpectedly increasing, thus ensuring high safety. Since the ratchet teeth 54 and 66 are unidirectional, when the surgeon needs to move the limiting sleeve 61 forward, they can push the limiting sleeve 61 forward directly without pulling the operating bar 64 outward. See [link to relevant documentation]. Figure 8 The limiting sleeve 61 then drives the second ratchet 66 on the ratchet block 62 to overcome the elastic force of the push spring (not shown in the figure) and move forward along the tooth surface 541 of the currently engaged first ratchet 54 until it moves forward past the currently engaged first ratchet 54.
[0027] See Figure 3The limiting sleeve 61 also serves as a lamp holder. A lamp mounting part 616 protrudes laterally from the rear end 615 of the limiting sleeve 61. A lamp mounting hole 617 is provided on the lamp mounting part 616, into which a lighting fixture 7 is installed. A power cable (not shown in the figure) extends rearward from the lighting fixture 7 and is wound around the handle 2 (see...). Figure 2 The light fixture 7 extends outward from the external power source and emits light forward to provide illumination for the doctor. In a non-preferred embodiment, the light fixture mounting section and the light fixture itself can be omitted.
[0028] See Figure 3 After the surgery is completed, the doctor only needs to pull the buckle 6181 of the limiting sleeve body 618 to make it exit the slot 6191, which will release the locking between the limiting sleeve body 618 and the locking plate 619. In this way, the limiting sleeve 61 can be removed from the front end 51 of the cutter head body 5. Then, the push tooth spring 63, ratchet plate 62, operating bar 64 connected to ratchet plate 62 and second ratchet 66 can also be removed from the front end 51 of the cutter head body 5. The cutter head body 5, limiting sleeve 61, ratchet plate 62, operating bar 64 connected to ratchet plate 62 and second ratchet 66 can be cleaned respectively.
[0029] The above description is merely an embodiment of the present invention and does not limit the scope of patent protection. Any non-substantial changes or substitutions made by those skilled in the art based on the present invention will still fall within the scope of patent protection.
Claims
1. An ultrasonic osteotome head with adjustable stopper, comprising a head body, a stopper protruding laterally outward is movably installed at the front end of the head body, the stopper can move forward and backward along the head body to adjust the maximum cutting depth of the front end of the head body, characterized in that: The first ratchet gear is arranged on the front end side wall of the tool bit body. The limiting member comprises a limiting member body, and a second ratchet gear and a pushing gear spring are arranged on the limiting member body. The pushing gear spring pushes the second ratchet gear to the first ratchet gear to make the second ratchet gear engage the first ratchet gear, so that the limiting member body is blocked by the first ratchet gear and cannot move backward along the tool bit body. The second ratchet gear is provided with an exposed operation part for human operation. When the second ratchet gear is operated to overcome the elastic force of the pushing gear spring to disengage the first ratchet gear, the limiting member body is no longer blocked by the first ratchet gear and can move forward and backward along the tool bit body.
2. The ultrasonic bone cutter head of claim 1, wherein: The limiting member body is specifically a limiting sleeve which is sleeved outside the tool bit body. The second ratchet gear and the pushing gear spring are arranged in the limiting sleeve. An operation hole is arranged on the side wall of the limiting sleeve, and the operation part of the second ratchet gear extends outward from the operation hole.
3. The ultrasonic bone cutter head of claim 2, wherein: The operation part of the second ratchet gear specifically extends outward from the limiting sleeve in a direction away from the first ratchet gear. When the operation part is pulled outward, the second ratchet gear moves away from the first ratchet gear to disengage the first ratchet gear.
4. The ultrasonic bone cutter head of claim 3, wherein: The operation part of the second ratchet gear is a cylindrical type which extends axially outward. At least two hand holding grooves are formed in the side wall of the operation part in a radial direction, so that at least two fingers can be buckled in the grooves to hold the operation part together.
5. The ultrasonic bone cutter head of claim 4, wherein: The end part of the operation part of the second ratchet gear is a semicircular ball shape.
6. The ultrasonic bone cutter head of claim 2, wherein: The limiting sleeve extends forward to the front side of the first ratchet gear and the second ratchet gear and extends inward laterally to have a blocking block for blocking foreign matters to prevent them from entering the limiting sleeve.
7. The ultrasonic bone cutter head of claim 6, wherein: The blocking block also serves as a lateral positioning block which contacts the front end side wall of the tool bit body to laterally position the limiting sleeve.
8. The ultrasonic bone cutter head of claim 1, wherein: A plurality of parallel scale lines are arranged on the front end side wall of the tool bit body.
9. The ultrasonic bone cutter head of claim 1, wherein: The limiting member also serves as a lamp holder which is provided with a lamp mounting part at the rear end of the limiting member body for mounting a lighting lamp. The lighting lamp is mounted on the lamp mounting part.
10. An ultrasonic osteotome comprising a main machine, a handle and a foot switch connected to the main machine, an ultrasonic osteotome head installed at the front end of the handle, characterized in that: The tool bit of the ultrasonic bone cutter is as claimed in any one of claims 1 to 9.