Orthopedic impactor
By designing an adapter for the orthopedic impact device and coordinating the use of a rotary power tool, the problem of uneven impact during femoral stem insertion was solved, achieving constant impact and adjustable frequency, thus improving the safety and precision of the surgery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- IMEDICOM
- Filing Date
- 2021-03-15
- Publication Date
- 2026-06-09
AI Technical Summary
In hip replacement surgery, when existing techniques make it difficult to insert the femoral stem into the femur, it is impossible to guarantee the constant magnitude and direction of the impact, leading to the formation of abnormal spaces and affecting the surgical prognosis.
An orthopedic impactor was designed. Through an adapter that is detachably coupled to a rotary power tool, it utilizes ratchet coupling and a spring mechanism to achieve regular interval rotation of the impacting part and constant impact. The impacting part includes a housing part, a tool coupling part, a first rotating part, an impacting part transmission part, and the coordinated work of the impacting part and the force transmission part to ensure that the frequency and direction of the impact are consistent.
This technology enables the application of constant impact to the patient at regular intervals during orthopedic surgery, reducing the likelihood of fractures and improving the safety and precision of the procedure.
Smart Images
Figure CN116490151B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an orthopedic striking device. Background Technology
[0002] As the world's population ages, the demand for hip replacement surgery continues to rise. Furthermore, in recent years, the number of younger patients undergoing hip surgery due to various inflammations, tumors, and overexertion has also been increasing.
[0003] Hip replacement surgery is a procedure performed when there is an abnormality in the joint or bone connecting the hip bone (acetabulum) and the thigh bone (femur), replacing one or all of these joints with artificial joints.
[0004] Meanwhile, in this surgical procedure, the process of inserting the femoral stem into the correct position within the femur is one of the factors that determines the surgical outcome. In related techniques, in order to insert the femoral stem into the femur, a medullary needle is first inserted into the femur, then removed to create a space, and then the femoral stem is inserted into that space.
[0005] Meanwhile, the use of related technologies Figure 12 The method shown involves a surgeon manually striking the spinal cord needle 300 with a tool such as a hammer (M) to insert it into the femur 400 to create space for inserting the stem. However, in this case, because the magnitude and direction of the impact applied to the spinal cord needle 300 are not constant, an abnormal space is created in the femur. As a result, there is a problem that the surgical outcome deteriorates when the femoral stem is inserted into this space, requiring reoperation. Summary of the Invention
[0006] Technical issues
[0007] The present invention has been made to overcome the above-mentioned problems, and the object of the present invention is to provide an orthopedic impactor that can apply constant impacts to the object at regular intervals during orthopedic surgery.
[0008] Technical solution
[0009] To achieve the above objectives, the striking device according to an embodiment of the present invention includes an adapter detachably coupled to a rotary power tool, wherein the adapter may include a housing portion, a tool coupling portion receiving rotational force from the rotary power tool, a first rotating portion rotating in association with the rotation of the tool coupling portion only in one of the rotational directions of the tool coupling portion, an impact portion transmission portion rotating in association with the rotation of the first rotating portion, an impact portion moving in a first direction while compressing a first spring by the rotation of the impact portion transmission portion and then moving in a second direction opposite to the first direction by the restoring force of the first spring, and a force transmission portion moving in the second direction by contacting the impact portion.
[0010] In addition, the tool coupling part and the first rotating part can be ratcheted together, so that they rotate in relation to each other in only one direction.
[0011] Additionally, the impact transmission part may include a hole with one end open, a second spring disposed in the hole, and a first rod with both ends connected to the inner wall of the hole. The first rotating part may include a rectangular groove extending in the longitudinal direction, through which the first rod may pass, and one end of the second spring may contact the bottom surface of the hole and the other end of the second spring may contact the first rotating part.
[0012] In addition, the impact transmission part may include multiple threaded portions, threaded recesses formed between the multiple threaded portions, and longitudinal grooves extending in the longitudinal direction.
[0013] In addition, the impact transmission part can be rotated symmetrically with respect to the longitudinal central axis by 180°.
[0014] Additionally, the impact portion may include a body having a hole with an opening on one side and a second rod passing through the wall of the body and including one end protruding toward the hole and another end protruding toward the outside of the body, wherein the second rod may include two second rods arranged at 180° intervals facing each other.
[0015] In addition, when the impact transmission part rotates, one end of the second rod moves along the threaded recess, and when one end of the second rod moves out of the threaded recess and reaches the longitudinal groove, the impact part moves in the second direction by the restoring force of the first spring.
[0016] Additionally, the force transmission part may include a force transmission part body, a flange portion protruding from the outer surface of the force transmission part body, and a third spring configured to surround the force transmission part body on one side based on the flange portion, wherein the distal end of the force transmission part body may protrude from the housing portion, and one end of the third spring may contact the inner wall of the housing portion and the other end may contact the flange portion.
[0017] Additionally, the housing may include a locking claw that engages the flange and a longitudinal through-hole through which the second rod can move.
[0018] In addition, the first bearing may be disposed between the housing portion and the impact transmission portion, and the second bearing may be disposed between the housing portion and the tool coupling portion.
[0019] In addition, one end of the first spring can contact the first bearing and the other end of the first spring can contact the impact part.
[0020] Additionally, the housing portion may include a first compartment formed on the left side relative to the locking claw and a second compartment formed on the right side relative to the locking claw, and the force transmission portion may be located in the first compartment, and the impact portion, the impact transmission portion, the first rotation portion and the tool coupling portion may be sequentially arranged in the second compartment.
[0021] In addition, when the impact part and the impact part transmission part move to the right in a rotational relationship, the force transmission part can move to the right by the restoring force of the third spring and the flange part can be in a state where it is locked on the locking claw of the housing part, wherein a part of the force transmission part can be in a state where it is protruding into the second compartment at its furthest point.
[0022] Beneficial effects
[0023] The orthopedic striking device having the above-described construction according to an embodiment of the present invention has the following effects.
[0024] According to this orthopedic impactor, specific impacts can be applied to the subject at regular intervals during orthopedic surgery.
[0025] Furthermore, by controlling the number of rotations of the tool coupling, the frequency of the blows applied to the object can be easily adjusted as needed.
[0026] Furthermore, because the use of this striking device allows the target to be driven into the femur by repeatedly striking it with relatively weak force, it is safer than related surgical methods and can significantly reduce the likelihood of fracture.
[0027] Furthermore, although the present invention is not explicitly described, it also includes other effects that can be anticipated from the above-described structure. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of a striking device according to an embodiment of the present invention.
[0029] Figure 2 It shows Figure 1 The striking weapon.
[0030] Figure 3 yes Figure 2 An exploded view of the main structure of the striking weapon.
[0031] Figure 4 yes Figure 2 A cross-sectional view of the striking weapon.
[0032] Figure 5 It is shown Figure 2 A view showing the coupling relationship between the first rotating part and the tool coupling part of the striking device.
[0033] Figure 6 It shows Figure 2The coupling relationship between the first rotating part and the impact transmission part of the striker.
[0034] Figure 7 It is observed from all directions. Figure 2 A three-dimensional view of the impact transmission part of the striking device.
[0035] Figure 8 It shows Figure 2 The coupling relationship between the impact part and the impact transmission part of the striker.
[0036] Figure 9 yes Figure 2 A three-dimensional diagram of the main structure of the force transmission part of the striking device.
[0037] Figure 10 It is shown Figure 2 A view of the operation of the striker.
[0038] Figure 11 This shows that they are respectively in Figure 10 A view of the relative position of the second rod with respect to the impact transmission part in steps (a) to (c).
[0039] Figure 12 A method is shown that involves manually applying a blow to an object using a hammer (M) to insert it into the femur. Detailed Implementation
[0040] Preferred embodiments of the invention will be described in detail below with reference to the accompanying drawings, which will be apparent to those skilled in the art. However, it should be understood that the invention can be implemented in various other forms and should not be construed as limited to the specific examples described herein.
[0041] like Figure 1 As shown, the striking device according to an embodiment of the present invention includes an adapter 100 detachably coupled to a rotary power tool 200. The rotary power tool 200 can be a known power tool, and the adapter 100 can be coupled to the rotary power tool 200 by various known mechanical coupling methods. In this embodiment, for example, a plurality of hemispherical grooves 61 recessed at intervals in the circumferential direction can be formed on the outer side of the housing portion 6 of the adapter, and corresponding to the hemispherical grooves 61, the rotary power tool 200 can have a plurality of protruding hemispherical protrusions 201 formed therein, such that the adapter 100 and the rotary power tool 200 can be coupled or separated.
[0042] like Figures 2 to 4 As shown, the adapter 100 includes a housing part 6, a tool coupling part 5, a first rotating part 7, an impact transmission part 4, an impact part 3, and a force transmission part 1 as main components.
[0043] The housing portion 6 includes a locking claw 61 on which the flange portion 12 of the force transmission portion 1 (described below) can be engaged, and a longitudinal through hole 62 through which the second rod 31 of the impact portion 3 (described below) can move. Furthermore, relative to the locking claw 61, there is a first compartment 63 formed on the left side (based on...). Figure 4 The first compartment 63 is located in the first compartment 63, and the impact part 3, the impact part transmission part 4, the first rotation part 7 and the tool coupling part 5 are sequentially arranged in the second compartment 64.
[0044] The tool coupling unit 5 receives the rotational force of the rotary power tool to rotate. Therefore, as follows: Figure 4 As shown, the second bearing 9 is disposed between the housing part 6 and the tool coupling part 5.
[0045] like Figure 5 As shown, the first rotating part 7 rotates only in one of the rotational directions of the tool coupling part 5 (clockwise direction, based on...). Figure 5 (b) The first rotating part 7 rotates in relation to the rotation of the tool coupling part 5. Therefore, the tool coupling part 5 and the first rotating part 7 are ratcheted, so their relative motion is restricted to only one direction (R). For reference, ratcheting coupling refers to coupling that restricts the movement of a mechanical element to only one side. Therefore, when the tool coupling part 5 rotates in the clockwise direction (R), the first rotating part 7 rotates in relation to the rotation of the tool coupling part 5.
[0046] When the tool coupling part 5 is in the opposite direction (i.e., in the counterclockwise direction) (based on Figure 5 When (b) rotates, the first rotating part 7 is pushed to the left (based on...). Figure 5 (a)) so that the first rotating part 7 cannot move in association with the tool coupling part 5. In this respect, as Figure 6 As shown in (b), the first rotating part 7 includes a rectangular groove 71 extending in its longitudinal direction.
[0047] The impact transmission section 4 rotates in conjunction with the rotation of the first rotating section 7. Therefore, as follows... Figure 4 As shown, the first bearing 8 is disposed between the housing part 6 and the impact transmission part 4.
[0048] like Figure 4 and Figure 6As shown in (a), the impact transmission part 4 includes a hole 43 into which the distal end of the first rotating part 7 is inserted, a second spring 42 disposed within the hole 43, and a first rod 41 whose two ends are connected to the inner wall of the hole 43. In this case, the first rod 41 passes through the rectangular groove 71 of the first rotating part 7, one end of the second spring 42 contacts the bottom surface of the hole 43, and the other end contacts the first rotating part 7. Thus, through the restoring force of the second spring 42, the first rotating part 7 continuously bears a force toward the tool coupling part 5. In addition, as described above, based on Figure 5 (b) When the tool coupling part 5 rotates counterclockwise, the first rotating part 7 moves to the left relative to the tool coupling part 5 (based on...). Figure 4 The first rod 41 moves to the right relative to the tool coupling part 5. For reference, at this time, the first rod 41 moves to the right relative to the tool coupling part 5 within the longitudinal groove 71.
[0049] In addition, such as Figure 7 As shown, the impact transmission part 4 includes a plurality of threaded portions 44, threaded recesses 45 formed between the plurality of threaded portions 44, and longitudinal grooves 46 extending in the longitudinal direction. In this example, the impact transmission part 4 can be rotationally symmetrical about 180° with respect to the longitudinal central axis C1 (see [reference]). Figure 7 (c)).
[0050] Reference Figure 4 and Figure 8 Through the rotation of the impact transmission part 4, the impact part 3 compresses the first spring 2 while simultaneously moving in the first direction (based on...). Figure 4 (to the right) and then, by the restoring force of the first spring 2, in a second direction opposite to the first direction (based on) Figure 4 (Move to the left). For reference, one end of the first spring 2 is in contact with the first bearing 8 and the other end is in contact with the impact part 3.
[0051] Specifically, the impact part 3 includes: a body 33 including a hole 32 with an opening on one side; and a second rod 31, one end of which protrudes through the wall of the body 33 toward the hole 32 in the lateral direction of the body 33 and the other end protrudes to the outside of the body 33. Two second rods 31 may be provided facing each other at a 180° interval.
[0052] When the impact transmission part 4 rotates, the second rod 31 of the impact part 3 moves along the threaded recess 45 of the impact transmission part 4 (at this time, as...). Figure 10 As shown in (a), the second rod 31 contacts the left wall of the threaded recess 45, and when the second rod 31 moves out of the threaded recess 45 and reaches the longitudinal groove 46, the impact part 3 is subjected to the restoring force of the first spring 2 in the second direction (based on...). Figure 4 (Move quickly to the left).
[0053] Force transmission unit 1 contacts the rapidly moving impact unit 3 in the second direction (based on) Figure 4 (Move to the left).
[0054] Reference Figure 4 and Figure 9 The force transmission unit 1 includes a force transmission unit body 13, an annular flange portion 12 protruding from the outer surface of the force transmission unit body 13, and a component configured to be positioned on one side relative to the flange portion 12 (based on...). Figure 4 The third spring 11 surrounds the main body 13 of the force transmission section on the left side (upper left side).
[0055] The distal end of the force transmission part 13 protrudes from the housing part 6.
[0056] The third spring 11 is in a compressed state, with one end contacting the inner wall of the housing portion 6 and the other end contacting the flange portion 12. Therefore, when no other load is applied to the force transmission part body 13 from the outside, the flange portion 12 of the force transmission part body 13 is kept in contact with the locking claw 61 of the housing portion 6 by the restoring force of the third spring 11.
[0057] The operation of a striker having the above-described construction according to an embodiment of the present invention will be described below. Figure 10 The adapter 100 of the present invention is shown in a state of being coupled to a rotary power tool, and the rotary power tool is not shown for ease of explanation.
[0058] Figure 10 (a) shows the state where the rotational force of the rotary power tool is not transmitted to the tool coupling part 5, i.e., the non-operating state of the rotary power tool. At this time, the impact part 3 contacts the force transmission part 1 through the restoring force of the first spring 2. In addition, one end of the second rod 31 of the impact part 3 is located in the threaded recess 45 of the impact part transmission part 4 (see Figure 11 (a)
[0059] Next, as Figure 10 As shown in (b), when a clockwise (R) rotational force is applied to the tool coupling part 5, the impact transmission part 4 also rotates in conjunction with the rotation of the tool coupling part 5 via the first rotating part 7. Furthermore, as the impact transmission part 4 rotates, the second rod 31 of the impact part 3 moves along the threaded recess 45 of the impact transmission part 4. As the impact part 3 gradually moves to the right, more and more elastic energy accumulates in the first spring 2 (see...). Figure 11 (b)
[0060] At this time, the force transmission part 1 moves to the right by the restoring force of the third spring 11, so that the flange part 12 is locked on the locking claw 61 of the housing part 6, and the left end of the force transmission part 1 is in the state of protruding into the second compartment 64 of the housing part 6 at its furthest point.
[0061] Next, as Figure 10 As shown in (c), when the second rod 31 of the impact part 3 moves out of the threaded recess 45 of the impact part transmission part 4 and reaches the longitudinal groove 46, the impact part 3, through the restoring force of the first spring 2, moves in the second direction (based on...). Figure 10 (Move quickly to the left).
[0062] Finally, when the impact unit 3 strongly impacts the force transmission unit 1, the force transmission unit 1 transmits the impact force of the impact unit 3 to the object while overcoming the restoring force of the third spring 11. For reference, Figure 11 (a) to (c) are respectively corresponding to Figure 10 The views (a) to (c) schematically show the relative position of the second rod 31 in the impact transmission section 4 at each step.
[0063] In this example, when the impact part 3 rotates further, the second rod 31 of the impact part 3 re-enters the threaded recess 45 of the impact part transmission part 4, and the above process is repeated.
[0064] Although the invention has been described in conjunction with some examples herein, the invention should not be limited to these examples, and various other modifications and variations made by those skilled in the art from the basic concepts of the invention are also within the scope of the appended claims.
[0065] Industrial applicability
[0066] This invention can be used in orthopedic surgeries such as hip replacement surgery.
Claims
1. A striking device comprising an adapter detachably coupled to a rotary power tool, wherein the adapter includes: Shell section; A tool coupling part that receives rotational force from the rotary power tool; The first rotating part rotates in association with the rotation of the tool coupling part only in one of the rotation directions of the tool coupling part; The impact transmission part rotates in relation to the rotation of the first rotating part; The impact part moves in a first direction while compressing the first spring through the rotation of the impact part transmission part, and then moves in a second direction opposite to the first direction through the restoring force of the first spring; as well as The force transmission part moves in the second direction by contacting the impact part. The impact transmission part includes a hole open at one end, a second spring disposed within the hole, and a first rod whose two ends are connected to the inner wall of the hole. The first rotating part includes a rectangular groove extending in the longitudinal direction. The first rod passes through the rectangular slot; and One end of the second spring contacts the bottom surface of the hole, and the other end of the second spring contacts the first rotating part.
2. The striking device according to claim 1, wherein, The tool coupling part and the first rotating part are ratcheted together, so that they rotate in relation to each other only in the one direction.
3. The striking device according to claim 1, wherein, The impact transmission part includes multiple threaded portions, threaded recesses formed between the multiple threaded portions, and longitudinal grooves extending in the longitudinal direction.
4. The striking device according to claim 3, wherein, The impact transmission part is 180° rotationally symmetrical with respect to the longitudinal central axis.
5. The striking device according to claim 4, wherein, The impact portion includes: The main body, which has a hole open on one side; and The second rod passes through the wall of the body and includes one end protruding toward the hole and another end protruding toward the outside of the body, wherein, The second rod includes two second rods arranged at a 180° interval and facing each other.
6. The striking device according to claim 5, wherein, When the impact transmission part rotates, the one end of the second rod moves along the threaded recess, and when the one end of the second rod moves out of the threaded recess and reaches the longitudinal groove, the impact part moves in the second direction by the restoring force of the first spring.
7. The striking device according to claim 5, wherein, The force transmission unit includes: The main body of the force transmission section; A flange portion protrudes from the outer surface of the force transmission part body; and A third spring is configured to surround the force transmission part body on one side based on the flange portion, wherein... The distal end of the force transmission part protrudes from the housing part, and One end of the third spring contacts the inner wall of the housing portion and the other end contacts the flange portion.
8. The striking device according to claim 7, wherein, The housing portion further includes: Locking claw, the flange portion of which can be engaged; and A longitudinal through-hole through which the second rod can move.
9. The striking device according to claim 1, wherein, The first bearing is disposed between the housing portion and the impact transmission portion, and The second bearing is disposed between the housing portion and the tool coupling portion.
10. The striking device according to claim 9, wherein, One end of the first spring contacts the first bearing and the other end of the first spring contacts the impact part.
11. The striking device according to claim 8, wherein, The housing portion includes a first compartment formed on the left side relative to the locking claw and a second compartment formed on the right side relative to the locking claw, and The force transmission part is located in the first compartment, and the impact part, the impact transmission part, the first rotation part and the tool coupling part are sequentially arranged in the second compartment.
12. The striking device according to claim 11, wherein, When the impact portion moves to the right in rotational association with the impact portion transmission portion, the force transmission portion moves to the right by the restoring force of the third spring and the flange portion is in a state of being locked on the locking pawl of the housing portion, wherein a portion of the force transmission portion is in a state of being protruding as far as possible into the second compartment.