Novel tendon taking device

Abstract

The utility model relates to a novel tendon taking device, and relates to the technical field of medical instruments, the novel tendon taking device comprises a first main body and a second main body which are hinged to each other through a pin, and a locking assembly for preventing the first main body and the second main body from being away from each other, the first main body or the second main body is elastically deformed, so that the first helical teeth and the second helical teeth are mutually buckled; the limiting piece is used for preventing the ends close to the tendon from transversely moving in the axis direction of the pin when the first body and the second body deform. A user enables the first main body and the second main body to get close to each other and fixedly clamp the tendon, and the first helical teeth and the second helical teeth are buckled with each other under the elastic deformation action of the first main body and the second main body, so that the first main body and the second main body are locked; meanwhile, the limiting piece prevents the ends, close to the tendon, of the first main body and the second main body from transversely moving when the first main body and the second main body deform, so that the probability that the tendon is disengaged or damaged in the clamping process of the tendon taking device is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a novel tendon extractor. BACKGROUND

[0002] For patients with ligament rupture such as cruciate ligament rupture, medial collateral ligament rupture and lateral collateral ligament rupture, autologous tendon from other parts of the patient is often used for ligament reconstruction, such as gracilis muscle, semitendinosus muscle, etc. When the autologous tendon is taken, a tendon extractor is used to complete the operation of taking the tendon.

[0003] At present, the tendon extractor is divided into open tendon extractor and closed tendon extractor, both of which are designed with hollow head to facilitate the taking of the tendon. The closed tendon extractor needs to cut off one end of the tendon first, and then the end of the tendon is clamped with surgical forceps, and the tendon is passed through the hollow pipe of the head of the tendon extractor. The operation is complicated. The open tendon extractor is convenient for taking the tendon, but the problem of the tendon coming out of the head opening may occur when taking the tendon.

[0004] The Chinese patent with the patent publication number CN213047167U discloses a novel tendon cutter, wherein during the movement of the tendon after cutting, the user needs to continuously exert force to ensure the clamping of the instrument on the tendon and prevent the tendon from coming off during the movement of the tendon, thereby reducing the practicality of the instrument. CONTENT OF THE UTILITY MODEL

[0005] In order to reduce the probability of tendon disengagement or injury during the movement of the tendon extractor, the present application provides a novel tendon extractor.

[0006] The novel tendon extractor provided by the present application adopts the following technical solution:

[0007] A novel tendon extractor, comprising a first body and a second body which are hinged to each other by a pin and clamp the tendon, wherein a locking assembly for preventing the first body and the second body from moving away from each other is arranged on the first body and the second body, and the locking assembly comprises:

[0008] A first bevel gear is arranged on one end of the first body away from the tendon;

[0009] A second bevel gear is arranged on one end of the second body away from the tendon, and the one end of the first body and the second body away from the tendon can elastically deform along the axis direction of the pin, and the second bevel gear and the first bevel gear elastically deform the first body or the second body after being close to each other and make the first bevel gear and the second bevel gear interlock.

[0010] A limiting piece is arranged on one end of the first body and the second body close to the tendon, and the limiting piece is used to prevent the one end close to the tendon from moving horizontally along the axis direction of the pin when the first body and the second body deform.

[0011] By using the above technical scheme, the user makes the first body and the second body away from each other to put the tendon to be clamped on the end of the first body or the second body close to the tendon, and then makes the first body and the second body close to each other to clamp and fix the tendon, the first inclined tooth and the second inclined tooth are buckled to each other under the elastic deformation of the first body and the second body, and then the first body and the second body are locked, and meanwhile the limiting piece prevents the end of the first body and the second body close to the tendon from moving transversely when the first body and the second body are deformed, so as to reduce the probability of the tendon being separated or damaged during clamping of the tendon clamp.

[0012] Further, the first inclined tooth is provided with a first inclined guide surface, the second inclined tooth is provided with a second inclined guide surface, the first inclined guide surface and the second inclined guide surface slide relative to each other and make the first body and the second body elastically deform away from the end close to the tendon, and the first inclined tooth and the second inclined tooth prevent the first body and the second body from moving away from each other when buckled.

[0013] By using the above technical scheme, when the first body and the second body move close to each other, the first inclined guide surface and the second inclined guide surface slide relative to each other to make the first body and the second body elastically deform away from the end close to the tendon, and when the first inclined tooth and the second inclined tooth are buckled to each other, the first body and the second body recover from the deformation, so as to prevent the first body and the second body from moving away from each other.

[0014] Further, the first body includes a first rod body, a first handle and a first head provided at both ends of the first rod body respectively, the second body includes a second rod body, a second handle and a second head provided at both ends of the second rod body respectively, and the first rod body and the second rod body are hingedly connected by a pin.

[0015] By using the above technical scheme, the first rod body and the second rod body are hingedly connected by the pin, the first head and the second head cooperate with each other to clamp and fix the tendon, and the first handle and the second handle facilitate control of rotation of the first rod body and the second rod body.

[0016] Further, the first head and the second head are both semi-annular hollow pipes, and the first head and the second head can be closed to form a complete annular pipe to clamp and fix the tendon.

[0017] By using the above technical scheme, when the first head and the second head move away from each other, the tendon is put into the semi-annular hollow pipe, and when the first head and the second head are closed to each other, the complete annular pipe clamps and fixes the tendon, thereby reducing the probability of damage to the tendon.

[0018] Further, the limiting piece is a limiting protrusion arranged on the first head, and the second head is provided with a groove on the end face close to the first head, the limiting protrusion being matched with the groove.

[0019] By using the above technical scheme, when the first head is close to the second head, the limiting protrusion and the groove are matched with each other to prevent the first head and the second head from moving transversely along the pin axis.

[0020] Further, the limiting protrusion is provided with an inclined round corner close to one end of the groove, and the limiting protrusion is guided into the groove through the inclined round corner.

[0021] By using the above technical scheme, when the limiting protrusion is close to the groove, the limiting protrusion is guided into the groove through the inclined round corner.

[0022] Further, the first handle and the second handle are both provided with anti-skid holes for the user to hold.

[0023] By using the above technical scheme, the user can put fingers into the anti-skid holes to drive the first handle and the second handle to rotate.

[0024] Further, the first inclined tooth comprises a first locking plate and a plurality of groups of first ratchets arranged at intervals, the second inclined tooth comprises a second locking plate and a plurality of groups of second ratchets arranged at intervals, the plurality of groups of first ratchets and the plurality of groups of second ratchets can be engaged with each other, and the locking force between the first main body and the second main body can be changed by changing the number of engagement between the first ratchets and the second ratchets.

[0025] By using the above technical scheme, when the first handle and the second handle are close to each other, the plurality of groups of first ratchets and the plurality of groups of second ratchets are engaged with each other, the number of engagement between the first ratchets and the second ratchets is controlled, and then the locking force between the first main body and the second main body is controlled, so as to reduce the probability of the tendon being separated during the movement of the tendon extractor.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. By using the user to make the first handle and the second handle away from each other, so that the tendon to be clamped is put into the first head or the second head, and then the first handle and the second handle are made close to each other, the tendon is fixed and clamped by the complete circular ring tube closed by the first head and the second head, the first bevel gear and the second bevel gear are buckled to each other under the elastic deformation of the first main body and the second main body, and then the first main body and the second main body are locked, and at the same time, the first head and the second head are prevented from moving transversely when the first main body and the second main body are deformed by the limiting piece and the groove being buckled to each other, so as to reduce the probability of tendon disengagement or injury during the tendon extractor clamping process.

[0028] 2. When the first handle and the second handle are close to each other, a plurality of first ratchet gears and a plurality of second ratchet gears are engaged with each other, the locking force between the first main body and the second main body can be controlled by controlling the number of engagement between the first ratchet gear and the second ratchet gear, so as to reduce the probability of tendon disengagement during the movement of the tendon extractor. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic view of the novel tendon extractor structure of embodiment 1 of the present application.

[0030] Figure 2 It is a schematic view of the novel tendon extractor structure of embodiment 1 of the present application. Figure 1

[0031] Figure 3 It is a schematic view of the novel tendon extractor structure of embodiment 1 of the present application. Figure 1

[0032] Figure 4 It is a schematic view of the novel tendon extractor structure of embodiment 1 of the present application. Figure 3

[0033] Figure 5 It is a schematic view of the novel tendon extractor structure of embodiment 2 of the present application.

[0034] Figure 6 It is a schematic view of the novel tendon extractor structure of embodiment 2 of the present application. Figure 5

[0035] Reference signs: 1, first main body; 11, first head; 12, first rod body; 13, first handle; 131, anti-skid hole; 2, second main body; 21, second head; 211, groove; 22, second rod body; 23, second handle; 3, pin; 4, locking assembly; 41, first bevel gear; 411, first tooth head; 412, first tooth root; 413, first buckling groove; 414, first locking plate; 415, first ratchet gear; 42, second bevel gear; 421, second tooth head; 422, second tooth root; 423, second buckling groove; 424, second locking plate; 425, second ratchet gear; 43, limiting protrusion. DETAILED DESCRIPTION ​​​​

[0036] The following is combined with Figures 1-6 This application is described in further detail.

[0037] The embodiment of the present application discloses a new tendon remover.

[0038] Example 1

[0039] Reference Figure 1 and Figure 2 A new tendon remover includes a first body 1 and a second body 2 which are hinged to each other by a pin 3 and clamp the tendon. The first body 1 and the second body 2 are provided with a locking component 4 for preventing the first body 1 and the second body 2 from moving away from each other.

[0040] Reference Figure 1 and Figure 3 The first body 1 includes a first rod body 12, a first handle 13 and a first head 11, wherein the first handle 13 and the first head 11 are respectively installed on the two ends of the first rod body 12, and the second body 2 includes a second rod body 22, a second handle 23 and a second head 21, wherein the second handle 23 and the second head 21 are respectively installed on the two ends of the second rod body 22, and the first rod body 12 and the second rod body 22 are hinged to each other through a pin 3, so that the first rod body 12 and the second rod body 22 rotate around the pin 3 as the axis.

[0041] Reference Figure 1 and Figure 3 When the first rod body 12 and the second rod body 22 rotate with the pin 3 as the axis, the first head 11 and the second head 21 are driven to approach or move away from each other, so as to clamp the tendon through the first head 11 and the second head 21; wherein the first head 11 and the second head 21 are both semi-circular hollow tubes. When the first head 11 and the second head 21 are close to each other and pressed against each other, the two groups of semi-circular hollow tubes can be closed into a complete circular tube and thereby fix and clamp the tendon, reducing the probability of damage to the tendon; when the first head 11 and the second head 21 are moved away from each other, it is convenient to put the tendon into or take it out of the single group of semi-circular hollow tubes.

[0042] Reference Figure 1 In order to facilitate the user to drive the first rod body 12 and the second rod body 22 to rotate through the first handle 13 and the second handle 23, the first handle 13 and the second handle 23 are both provided with anti-slip holes 131 for the user to grip tightly. When in use, the fingers are inserted into the anti-slip holes 131 to drive the first handle 13 and the second handle 23 to rotate.

[0043] Reference Figure 1 and Figure 2, the locking assembly 4 comprises a first inclined tooth 41 and a second inclined tooth 42, the first inclined tooth 41 is fixedly installed on the first handle 13 and located on one end close to the second handle 23, the first inclined tooth 41 comprises a first tooth head 411 and a first tooth root 412, wherein the first tooth root 412 is fixedly installed on the first handle 13, and the first tooth head 411 is fixedly installed on one end of the first tooth root 412 close to the second handle 23, wherein the first tooth head 411 and the first tooth root 412 form a first buckling groove 413; the second inclined tooth 42 has a structure similar to that of the first inclined tooth 41, the second inclined tooth 42 comprises a second tooth head 421 and a second tooth root 422, wherein the second tooth root 422 is fixedly installed on the second handle 23, and the second tooth head 421 is fixedly installed on one end of the second tooth root 422 close to the first handle 13, wherein the second tooth head 421 and the second tooth root 422 form a second buckling groove 423.

[0044] With reference to Figure 1 and Figure 2 , one end of the first tooth head 411 close to the second handle 23 is provided with a first inclined guide surface, and one end of the second tooth head 421 close to the first handle 13 is provided with a second inclined guide surface; when the first handle 13 and the second handle 23 are close to each other, the first inclined guide surface and the second inclined guide surface slide against each other and make the first body 1 and the second body 2 elastically deform along the axis direction of the pin 3, and make the first handle 13 and the second handle 23 move away from each other along the axis direction of the pin 3; when the first tooth head 411 enters the second buckling groove 423, the second tooth head 421 also enters the first buckling groove 413, so that the first body 1 and the second body 2 restore deformation and move close to each other along the axis direction of the pin 3, and at the same time prevent the first handle 13 and the second handle 23 from rotating in the direction of moving away from each other, so as to make the complete circular ring pipe formed by the first head 11 and the second head 21 fixedly clamp the tendon, and reduce the probability of the tendon being separated during the movement of the tendon extractor.

[0045] With reference to Figure 1 and Figure 2 , when it is necessary to unlock the first handle 13 and the second handle 23, the first body 1 and the second body 2 are deformed by external force, so that the first handle 13 and the second handle 23 move away from each other along the axis direction of the pin 3, and when the first tooth head 411 completely slides out of the second buckling groove 423 and the second tooth head 421 completely slides out of the first buckling groove 413, the first handle 13 and the second handle 23 are rotated, so as to make the first handle 13 and the second handle 23 rotate in the direction of moving away from each other.

[0046] With reference to Figure 1 , Figure 3 and Figure 4, the locking assembly 4 further comprises a limiting piece arranged on the first head 11 and the second head 21, the limiting piece is used for preventing the first head 11 and the second head 21 from moving transversely along the axis of the pin 3 when the first body 1 and the second body 2 are deformed; the limiting piece is a limiting protrusion 43 fixedly arranged on the first head 11, the limiting protrusion 43 is located on the end face of the first head 11 close to the second head 21, and the limiting protrusion 43 is a long rectangular block; a groove 211 matched with the limiting protrusion 43 is arranged on the end face of the second head 21 close to the first head 11; when the first head 11 and the second head 21 are closed to form a complete annular pipe, the limiting protrusion 43 is completely matched in the groove 211, the limiting protrusion 43 is matched in the groove 211, and then the first head 11 and the second head 21 are prevented from moving transversely along the axis of the pin 3, so that the purpose of protecting the tendon in the annular pipe is achieved.

[0047] With reference to Figure 3 and Figure 4 When the first head 11 and the second head 21 are close to each other, in order to facilitate the limiting protrusion 43 to enter the groove 211, an inclined round corner is arranged at one end of the limiting protrusion 43 close to the groove 211, and the limiting protrusion 43 is guided into the groove 211 through the inclined round corner, thereby facilitating the guiding of the limiting protrusion 43 into the groove 211.

[0048] The working principle of the embodiment 1 of the application is as follows:

[0049] The user makes the first handle 13 and the second handle 23 away from each other, so as to put the tendon to be clamped into the first head 11 or the second head 21, and then makes the first handle 13 and the second handle 23 close to each other, so as to fix and clamp the tendon through the closed annular pipe of the first head 11 and the second head 21, the first bevel gear 41 and the second bevel gear 42 are matched with each other under the elastic deformation of the first body 1 and the second body 2, thereby locking the first body 1 and the second body 2, and the limiting piece and the groove 211 are matched with each other, thereby preventing the first head 11 and the second head 21 from moving transversely when the first body 1 and the second body 2 are deformed, so as to reduce the probability of tendon disengagement or injury during clamping of the tendon extractor.

[0050] Embodiment 2

[0051] With reference to Figure 5 and Figure 6The difference between the embodiment and the embodiment 1 is that the first inclined tooth 41 comprises a first locking plate 414 and a plurality of groups of first ratchets 415 arranged at intervals, and the second inclined tooth 42 comprises a second locking plate 424 and a plurality of groups of second ratchets 425 arranged at intervals. When the first handle 13 and the second handle 23 are close to each other, the first ratchets 415 and the second ratchets 425 are engaged with each other. As the number of engagement of the first ratchets 415 and the second ratchets 425 increases, the locking force between the first body 1 and the second body 2 also increases, thereby reducing the probability that the first head 11 and the second head 21 are far away from each other.

[0052] With reference to Figure 5 and Figure 6 As the plurality of groups of first ratchets 415 and the plurality of groups of ratchets are engaged with each other, the locking force required by a single group of first ratchets 415 and second ratchets 425 is smaller, thereby making the depth between the plurality of groups of first ratchets 415 and the plurality of groups of second ratchets 425 shallower, and reducing the deformation amount of the first body 1 and the second body 2 elastically deformed along the axis direction of the pin 3.

[0053] The working principle of the embodiment 2 of the application is as follows:

[0054] When the first handle 13 and the second handle 23 are close to each other, the plurality of groups of first ratchets 415 and the plurality of groups of second ratchets 425 are engaged with each other. By controlling the number of engagement between the first ratchets 415 and the second ratchets 425, the locking force between the first body 1 and the second body 2 can be controlled, so as to reduce the probability that the tendon is separated during the movement of the tendon harvester.

[0055] The above are the preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, any equivalent changes made on the basis of the structure, shape, and principle of the application should be covered within the protection scope of the application.

Claims

1. A new tendon remover, characterized by: The invention comprises a first main body (1) and a second main body (2) which are hinged to each other via a pin (3) and are used to clamp a tendon. The first main body (1) and the second main body (2) are provided with a locking assembly (4) for preventing the first main body (1) and the second main body (2) from moving away from each other. The locking assembly (4) comprises: a first oblique tooth (41), the first oblique tooth (41) being arranged on an end of the first body (1) away from the tendon; A second oblique tooth (42), the second oblique tooth (42) being arranged on an end of the second body (2) away from the tendon, the ends of the first body (1) and the second body (2) away from the tendon being elastically deformable along the axis of the pin (3), and the second oblique tooth (42) being elastically deformed when the first oblique tooth (41) and the second body (2) are brought close to each other so that the first oblique tooth (41) and the second oblique tooth (42) are interlocked; A limiting member is provided on one end of the first body (1) and the second body (2) close to the tendon, and is used to prevent the first body (1) and the second body (2) from moving laterally along the axis of the pin (3) when the ends close to the tendon are deformed.

2. A new tendon remover according to claim 1, characterized in that: A first inclined guide surface is provided on the first oblique tooth (41), and a second inclined guide surface is provided on the second oblique tooth (42). The first inclined guide surface and the second inclined guide surface slide relative to each other and cause the first body (1) and the second body (2) to elastically deform away from one end of the tendon. When the first oblique tooth (41) and the second oblique tooth (42) are engaged, the first body (1) and the second body (2) are prevented from moving away from each other.

3. The novel tendon remover according to claim 1, characterized in that: The first body (1) comprises a first rod body (12), a first handle (13) and a first head (11) respectively arranged at two ends of the first rod body (12); the second body (2) comprises a second rod body (22), a second handle (23) and a second head (21) respectively arranged at two ends of the second rod body (22); the first rod body (12) and the second rod body (22) are hinged to each other via a pin (3).

4. A new tendon removal device according to claim 3, characterized in that: The first head (11) and the second head (21) are both semi-annular hollow tubes. The first head (11) and the second head (21) can be closed into a complete circular tube and can fix and clamp the tendon.

5. The novel tendon removal device according to claim 4, characterized in that: The limiting member is a limiting protrusion (43) provided on the first head (11); a groove (211) is provided on the end surface of the second head (21) on the side close to the first head (11) and is engaged with the limiting protrusion (43); when the first head (11) and the second head (21) are closed into a complete annular tube, the limiting protrusion (43) is engaged in the groove (211).

6. The novel tendon remover according to claim 5, characterized in that: An inclined chamfer is provided on one end of the limiting protrusion (43) close to the groove (211) to facilitate guiding the limiting protrusion (43) into the groove (211).

7. The novel tendon removal device according to claim 3, characterized in that: Both the first handle (13) and the second handle (23) are provided with anti-slip holes (131) for users to grip tightly.

8. The novel tendon remover according to claim 6, characterized in that: The first oblique teeth (41) include a first locking plate (414) and a plurality of groups of first ratchet teeth (415) arranged at intervals, and the second oblique teeth (42) include a second locking plate (424) and a plurality of groups of second ratchet teeth (425) arranged at intervals. The plurality of groups of the first ratchet teeth (415) and the plurality of groups of the second ratchet teeth (425) can mesh with each other, and changing the number of meshing of the first ratchet teeth (415) and the second ratchet teeth (425) can change the locking force between the first body (1) and the second body (2).

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