Medical high-speed abrasion drill backflow prevention device

Abstract

The invention discloses a medical high-speed abrasion drill anti-backflow device which comprises an abrasion head rod and a centrifugal disc, and the centrifugal disc is installed on the abrasion head rod. The front end of the grinding head rod is vertically downward or obliquely downward; and when the grinding head rod is in a rotating state, the centrifugal disc rotates together. By arranging the centrifugal disc, normal saline can be effectively prevented from flowing back to enter the motor through the rear end of the handle in the using process, the product failure rate is effectively reduced, the service life is prolonged, and safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of clinical high-speed burrs, in particular to a medical high-speed burr backflow prevention device. Background Art

[0002] High-speed grinding drills are widely used in clinical applications. They are usually required to efficiently complete bone grinding while ensuring that their service life, safety, and sealing properties meet clinical requirements. Especially in endoscopic minimally invasive surgery, sealing performance is even more critical.

[0003] In the existing technology, the defects and shortcomings of high-speed grinding drills are: although they can meet basic functional requirements, there is a serious phenomenon of saline reflux and even damage to the motor during spinal UBE surgery, which seriously affects the surgical effect. The main reason is that when the grinding head is running at high speed, the liquid adhering to the surface of the grinding rod enters the handle and the rear end interface at the rear end of the grinding head rod along the front end gap, and then flows into core components such as the motor, causing product failure and affecting the surgical process.

[0004] Currently, high-speed grinding drill products used in clinical practice usually use dynamic sealing to solve such problems. However, in the dynamic sealing method, there is relative movement and continuous friction between the sealing ring and the grinding head rod. When rotating at high speed, the sealing device is easily damaged, has a short lifespan, high cost, and a short handle lifespan. Damage to the sealing device during use will also result in the inability to guarantee the quality of the surgery. Summary of the invention

[0005] In view of the above problems existing in the existing medical high-speed burrs, the present invention aims to provide a medical high-speed burr backflow prevention device, which can effectively prevent the saline from flowing back through the rear end of the handle into the motor during use, effectively reducing the product failure rate and improving the service life and safety.

[0006] The specific technical solutions are as follows:

[0007] A medical high-speed grinding drill backflow prevention device comprises: a grinding head rod and a centrifugal disc, wherein the centrifugal disc is mounted on the grinding head rod;

[0008] The front end of the grinding head rod is vertically downward or inclined downward;

[0009] When the grinding head rod is in a rotating state, the centrifugal disc rotates together with it.

[0010] In the above-mentioned medical high-speed grinding drill backflow prevention device, a static sealing structure is provided between the grinding head rod and the centrifugal disk.

[0011] The above-mentioned medical high-speed grinding drill backflow prevention device, wherein a support sleeve is provided on the outer side of the grinding head rod, and a drainage structure is provided on the peripheral wall of the support sleeve, and the drainage structure is directly opposite to the disk surface of the centrifugal disk so that the liquid on the disk surface of the centrifugal disk can be discharged from the drainage structure.

[0012] The above-mentioned medical high-speed grinding drill backflow prevention device, wherein a positioning sleeve is provided on the grinding head rod, a concave cavity is formed between the positioning sleeve and the rear end of the centrifugal disk, the bottom of the concave cavity faces the front end of the grinding head rod, and the opening of the concave cavity faces the rear end of the grinding head rod;

[0013] The front end of the positioning sleeve is sealingly matched with the static sealing structure;

[0014] A gap is formed between the inner wall of the support sleeve and the outer wall of the centrifugal disk, and the gap extends to communicate with the concave cavity.

[0015] In the above-mentioned medical high-speed grinding drill backflow prevention device, the static sealing structure is a sealing ring.

[0016] The above-mentioned medical high-speed grinding drill backflow prevention device, wherein a clamping sleeve is provided at the rear end of the support sleeve, a portion of the clamping sleeve extends into the concave cavity and forms a U-shaped channel with the inner wall of the concave cavity, and the gap is connected to the U-shaped channel through a blocking channel;

[0017] The concave cavity is annular, and a portion of the clamping sleeve is a convex ring. The convex ring extends into the concave cavity and forms the U-shaped channel with the inner wall of the concave cavity.

[0018] The above-mentioned medical high-speed grinding drill backflow prevention device, wherein the centrifugal disc comprises a connecting portion and a disc body portion which are connected to each other;

[0019] The outer wall of the connecting portion has an inclined section, a blocking step and a straight section in sequence along the front-to-back direction of the grinding head rod, and the gap is formed between the inclined section, the blocking step, the straight section and the inner wall of the supporting sleeve;

[0020] The inner wall of the connecting portion has a first accommodating step, a connecting section and a second accommodating step in sequence along the front-to-back direction of the grinding head rod. The static sealing structure is arranged between the first accommodating step and the grinding head rod. The connecting section is fixedly connected to the outer wall of the positioning sleeve. The concave cavity is formed between the second accommodating step and the outer wall of the positioning sleeve.

[0021] The above-mentioned medical high-speed grinding drill backflow prevention device, wherein the disk surface of the disk body has a first inclined surface, the first inclined surface close to the grinding head rod extends toward the front end of the grinding head rod, and the first inclined surface close to the support sleeve extends toward the rear end of the grinding head rod;

[0022] The inner wall of the support sleeve has a second inclined surface, and the second inclined surface extends toward the front end of the grinding head rod from a side close to the grinding head rod, and extends toward the rear end of the grinding head rod from a side away from the grinding head rod. The second inclined surface is located between the front end of the support sleeve and the drainage structure, and the second inclined surface is close to the first inclined surface of the disc body.

[0023] The above-mentioned medical high-speed grinding drill backflow prevention device, wherein the drainage structure is a plurality of drainage holes, the plurality of drainage holes are arranged at equal intervals along the circumferential direction of the support sleeve, and the inner ends of the drainage holes face the disk surface of the centrifugal disk.

[0024] The above-mentioned medical high-speed bur backflow prevention device, wherein a support rod is provided on the outer periphery of the front end of the support sleeve.

[0025] Compared with the prior art, the above technical solution has the following positive effects:

[0026] The present invention can effectively prevent physiological saline from flowing back through the rear end of the handle and entering the motor during use by arranging a centrifugal disk, thereby effectively reducing the product failure rate and improving the service life and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of a medical high-speed grinding drill backflow prevention device of the present invention;

[0028] Figure 2 This is a structural cross-sectional view of a medical high-speed grinding drill backflow prevention device of the present invention;

[0029] Figure 3 A medical high-speed grinding drill backflow prevention device according to the present invention Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 A medical high-speed grinding drill backflow prevention device according to the present invention Figure 2 Middle partial enlarged picture;

[0031] Figure 5 It is a structural schematic diagram of a support sleeve of a medical high-speed grinding drill backflow prevention device of the present invention;

[0032] Figure 6 This is a schematic diagram of the exploded structure of a medical high-speed grinding drill backflow prevention device of the present invention;

[0033] Figure 7 It is a structural cross-sectional view of a centrifugal disk of a medical high-speed grinding drill backflow prevention device of the present invention;

[0034] In the accompanying drawings: 1. grinding head rod; 2. centrifugal disc; 3. static sealing structure; 4. positioning sleeve; 5. support sleeve; 6. drainage structure; 7. clamping sleeve; 11. handle; 21. connecting part; 22. disc body; 23. inclined section; 24. blocking step; 25. straight section; 26. first accommodating step; 27. connecting section; 28. first inclined surface; 51. gap; 52. second inclined surface; 53. support rod; 71. U-shaped channel; 72. blocking channel; 73. convex ring. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0036] like Figures 1 to 7 As shown, a preferred embodiment of a medical high-speed grinding drill backflow prevention device is shown, which includes: a grinding head rod 1 and a centrifugal disk 2, and the centrifugal disk 2 is installed on the grinding head rod 1.

[0037] Further, as a preferred embodiment, the front end of the grinding head rod 1 is vertically downward or inclined downward.

[0038] Furthermore, as a preferred embodiment, when the grinding head rod 1 is in a rotating state, the centrifugal disc 2 rotates together.

[0039] The present invention can effectively prevent physiological saline from flowing back through the rear end of the handle and entering the motor during use by providing the centrifugal disk 2, thereby effectively reducing the product failure rate and improving the service life and safety.

[0040] Most of the refluxed saline solution is discharged by the rotating centrifugal disk 2 .

[0041] The rear end of the grinding head rod 1 is connected to the handle 11 and the motor and other components.

[0042] Furthermore, as a preferred embodiment, a static sealing structure 3 is provided between the grinding head rod 1 and the centrifugal disc 2 .

[0043] Further, as a preferred embodiment, the static sealing structure 3 is a sealing ring. The sealing ring is made of medical grade silicone rubber, has the advantages of good corrosion resistance and rust resistance, and can meet repeated high temperature and high pressure sterilization, and the service life is greatly improved.

[0044] A small amount of backflow saline penetrates between the grinding head rod 1 and the centrifugal disk 2, so a static sealing structure 3 is set between the two. Since the grinding head rod 1 and the centrifugal disk 2 rotate together and are relatively stationary, the static sealing structure 3 has no rotational friction while achieving sealing and is not easily damaged, thereby increasing the service life.

[0045] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

[0046] The present invention also has the following implementation modes based on the above:

[0047] In further embodiments of the present invention, please continue to refer to Figures 1 to 7 As shown, a positioning sleeve 4 is provided on the grinding head rod 1 , and the front end of the positioning sleeve 4 is sealingly matched with the static sealing structure 3 .

[0048] The grinding head rod 1, the inner wall of the centrifugal disc 2 and the front end of the positioning sleeve 4 are sealed by a static sealing structure 3.

[0049] The centrifugal disc 2 is fixed on the positioning sleeve 4 .

[0050] When the centrifugal disc 2 is fixed to the positioning sleeve 4 , the grinding head rod 1 , the inner wall of the centrifugal disc 2 and the front end of the positioning sleeve 4 squeeze the static sealing structure 3 to improve the sealing between the centrifugal disc 2 and the grinding head rod 1 .

[0051] The centrifugal disc 2 and the positioning sleeve 4 are fixed by means of threads, bonding or interference fit.

[0052] Furthermore, a sealing ring is arranged between the positioning sleeve 4 and the grinding head rod 1, and the sealing ring is a static seal.

[0053] In a further embodiment of the present invention, a support sleeve 5 is provided on the outer side of the grinding head rod 1, and a drainage structure 6 is provided on the peripheral wall of the support sleeve 5. The drainage structure 6 is opposite to the disk surface of the centrifugal disk 2 so that the liquid on the disk surface of the centrifugal disk 2 can be discharged from the drainage structure 6.

[0054] In a further embodiment of the present invention, the drainage structure 6 is a plurality of drainage holes, which are arranged at equal intervals along the circumferential direction of the support sleeve 5, and the inner ends of the drainage holes face the disk surface of the centrifugal disk 2. The drainage holes penetrate the side wall of the support sleeve 5. When the refluxed physiological saline flows to the centrifugal disk, it is thrown away by the rotating centrifugal disk 2, and the liquid is thrown to the drainage holes and discharged under the action of centrifugal force.

[0055] Furthermore, the drainage structure 6 includes a drainage ring groove (not shown in the figure) and multiple drainage holes. The drainage ring groove is arranged on the inner wall of the support sleeve 5, and the drainage holes are arranged on the outer wall of the support sleeve 5. The inner ends of the drainage holes are connected to the drainage ring groove. The drainage ring groove can increase the discharge amount of physiological saline.

[0056] Furthermore, the outer end of the drainage hole on the support sleeve 5 is connected to a negative pressure device (not shown in the figure), which can increase the discharge amount of physiological saline through negative pressure.

[0057] In a further embodiment of the present invention, a cavity is formed between the positioning sleeve 4 and the rear end of the centrifugal disk 2, the bottom of the cavity faces the front end of the grinding head rod 1, and the opening of the cavity faces the rear end of the grinding head rod 1.

[0058] In a further embodiment of the present invention, a gap 51 is formed between the inner wall of the support sleeve 5 and the outer wall of the centrifugal disc 2 , and the gap 51 extends to communicate with the concave cavity.

[0059] A small amount of liquid that is not discharged from the drainage hole enters from the gap 51. When the high-speed grinding drill device is in use, a small amount of liquid will flow into the concave cavity for storage.

[0060] In a further embodiment of the present invention, a clamping sleeve 7 is provided at the rear end of the support sleeve 5, and part of the clamping sleeve 7 extends into the concave cavity and forms a U-shaped channel 71 with the inner wall of the concave cavity, and the gap 51 is connected to the U-shaped channel 71 through a blocking channel 72.

[0061] In a further embodiment of the present invention, the concave cavity is annular, and a portion of the clamping sleeve 7 is a convex ring 73 . The convex ring 73 extends into the concave cavity and forms a U-shaped channel 71 with the inner wall of the concave cavity.

[0062] A blocking channel 72 is set between the gap 51 and the U-shaped channel 71. The blocking channel 72 is set along the radial direction of the grinding head rod 1. A small amount of liquid that is not discharged from the drainage hole is blocked by the blocking channel 72 and the convex ring 73 after passing through the gap 51. A part of it is blocked in the U-shaped channel 71, and a part of it returns to the gap 51 and can also be discharged from the drainage hole. The blocked liquid will not splash out of the rear end of the grinding head rod 1, so the liquid that can remain in the U-shaped channel 71 is a very, very small amount, which effectively prevents the residual liquid from entering the rear end of the handle.

[0063] A blocking channel 72 and a U-shaped channel 71 are formed between the positioning sleeve 4 and the clamping sleeve 7, so there is no contact between the positioning sleeve 4 and the clamping sleeve 7. The positioning sleeve 4, the grinding head rod 1 and the centrifugal disk 2 rotate together. Since there is no contact with the clamping sleeve 7, no wear will occur, thereby increasing the service life.

[0064] In a further embodiment of the present invention, the centrifugal disc 2 comprises a connecting portion 21 and a disc body portion 22 which are connected to each other.

[0065] In a further embodiment of the present invention, the outer wall of the connecting portion 21 has an inclined section 23, a blocking step 24 and a straight section 25 in sequence along the front-to-back direction of the grinding head rod 1, and a gap 51 is formed between the inclined section 23, the blocking step 24, the straight section 25 and the inner wall of the support sleeve 5.

[0066] There are two blocking steps 24 symmetrically located on both sides of the outer wall of the connecting portion 21 of the centrifugal disc 2. Since the centrifugal disc 2 rotates when in use, the two blocking steps 24 have the effect of blocking liquid backflow in the rotating state.

[0067] When the reflux liquid entering the gap 51 passes through the inclined section 23 and the blocking step 24 , a portion of the liquid will also be discharged from the gap 51 through the drainage hole, so the reflux liquid that can reach the blocking channel 72 is already a very small amount.

[0068] In a further embodiment of the present invention, the inner wall of the connecting portion 21 has a first accommodating step 26, a connecting section 27 and a second accommodating step in sequence along the front-to-back direction of the grinding head rod 1, a static sealing structure 3 is arranged between the first accommodating step 26 and the grinding head rod 1, the connecting section 27 is fixedly connected to the outer wall of the positioning sleeve 4, and a concave cavity is formed between the second accommodating step and the outer wall of the positioning sleeve 4.

[0069] The sealing ring located at the first accommodating step 26 is squeezed due to the fixation of the positioning sleeve 4 and the centrifugal disk 2, so that the sealing performance can be improved.

[0070] The fixing of the positioning sleeve 4 to the centrifugal disk 2 at the connecting section 27 also further improves the sealing performance.

[0071] In a further embodiment of the present invention, the disk body 22 has a first inclined surface 28 on its disk surface, and the first inclined surface 28 extends toward the front end of the grinding head rod 1 on the side close to the grinding head rod 1, and extends toward the rear end of the grinding head rod 1 on the side close to the support sleeve 5.

[0072] In a further embodiment of the present invention, the inner wall of the support sleeve 5 has a second inclined surface 52, the second inclined surface 52 extends toward the front end of the grinding head rod 1 from the side close to the grinding head rod 1, and extends toward the rear end of the grinding head rod 1 from the side away from the grinding head rod 1. The second inclined surface 52 is located between the front end of the support sleeve 5 and the drainage structure 6, and the second inclined surface 52 is close to the first inclined surface 28 of the disc body 22.

[0073] Under the action of the centrifugal force of the centrifugal disk 3, a part of the liquid flowing back from the grinding head rod 1 is directly discharged from the drainage hole, and the liquid that is not discharged splashes onto the second inclined surface 52 and flows toward the centrifugal disk 2 again, and is thrown out again by the centrifugal force. Only a small amount of liquid on the side of the drainage hole enters the gap 51, which effectively prevents the residual liquid from entering the rear end of the handle 11.

[0074] In a further embodiment of the present invention, a support rod 53 is provided on the outer periphery of the front end of the support sleeve 5 .

[0075] The rear end of the support sleeve 5 is connected to the clamping sleeve 7 through threads and is provided with a static sealing ring.

[0076] Furthermore, the high-speed drill backflow prevention device of the present invention has a symmetrical structure as a whole, and maintains a good dynamic balance effect when the handle rotates at a high speed.

[0077] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A medical high-speed grinding drill backflow prevention device, characterized in that: include: A grinding head rod and a centrifugal disc, wherein the centrifugal disc is mounted on the grinding head rod; The front end of the grinding head rod is vertically downward or inclined downward; When the grinding head rod is in a rotating state, the centrifugal disc rotates together with it.

2. The medical high-speed grinding drill backflow prevention device according to claim 1, characterized in that: A static sealing structure is provided between the grinding head rod and the centrifugal disk.

3. The medical high-speed grinding drill backflow prevention device according to claim 1, characterized in that: A support sleeve is provided on the outer side of the grinding head rod, and a drainage structure is provided on the peripheral wall of the support sleeve. The drainage structure is opposite to the disk surface of the centrifugal disk so that the liquid passing through the disk surface of the centrifugal disk can be discharged from the drainage structure.

4. The medical high-speed grinding drill backflow prevention device according to claim 2, characterized in that: A positioning sleeve is provided on the grinding head rod, and a concave cavity is formed between the positioning sleeve and the rear end of the centrifugal disc, the bottom of the concave cavity faces the front end of the grinding head rod, and the opening of the concave cavity faces the rear end of the grinding head rod; The front end of the positioning sleeve is sealingly matched with the static sealing structure; A gap is formed between the inner wall of the support sleeve and the outer wall of the centrifugal disk, and the gap extends to communicate with the concave cavity.

5. The medical high-speed grinding drill backflow prevention device according to claim 2, characterized in that: The static sealing structure is a sealing ring.

6. The medical high-speed grinding drill backflow prevention device according to claim 4, characterized in that: A clamping sleeve is provided at the rear end of the support sleeve, a portion of the clamping sleeve extends into the concave cavity and forms a U-shaped channel with the inner wall of the concave cavity, and the gap is connected to the U-shaped channel through a blocking channel; The concave cavity is annular, and a portion of the clamping sleeve is a convex ring. The convex ring extends into the concave cavity and forms the U-shaped channel with the inner wall of the concave cavity.

7. The medical high-speed grinding drill backflow prevention device according to claim 3, characterized in that: The centrifugal disc comprises a connecting portion and a disc body portion which are connected to each other; The outer wall of the connecting portion has an inclined section, a blocking step and a straight section in sequence along the front-to-back direction of the grinding head rod, and the gap is formed between the inclined section, the blocking step, the straight section and the inner wall of the supporting sleeve; The inner wall of the connecting portion has a first accommodating step, a connecting section and a second accommodating step in sequence along the front-to-back direction of the grinding head rod. The static sealing structure is arranged between the first accommodating step and the grinding head rod. The connecting section is fixedly connected to the outer wall of the positioning sleeve. The concave cavity is formed between the second accommodating step and the outer wall of the positioning sleeve.

8. The medical high-speed grinding drill backflow prevention device according to claim 1, characterized in that: The disc surface of the disc body is provided with a first inclined surface, and a side of the first inclined surface close to the grinding head rod extends toward the front end of the grinding head rod, and a side of the first inclined surface close to the supporting sleeve extends toward the rear end of the grinding head rod; The inner wall of the support sleeve has a second inclined surface, and the second inclined surface extends toward the front end of the grinding head rod from a side close to the grinding head rod, and extends toward the rear end of the grinding head rod from a side away from the grinding head rod. The second inclined surface is located between the front end of the support sleeve and the drainage structure, and the second inclined surface is close to the first inclined surface of the disc body.

9. The medical high-speed grinding drill backflow prevention device according to claim 3, characterized in that: The drainage structure is a plurality of drainage holes, and the plurality of drainage holes are arranged at equal intervals along the circumferential direction of the support sleeve, and the inner ends of the drainage holes face the disk surface of the centrifugal disk.

10. The medical high-speed grinding drill backflow prevention device according to claim 3, characterized in that: A support rod is arranged on the outer periphery of the front end of the support sleeve.

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