Blade mounting structure and medical reshaping reciprocating sawing and bending machine

Abstract

The invention discloses a blade mounting structure and a medical reshaping reciprocating sawing and bending machine, and relates to the technical field of medical reshaping instruments. The blade mounting structure comprises a mounting sleeve, a shaft core sleeve and a shaft core pipe which are sequentially connected in a sleeving mode from outside to inside. The mounting sleeve is fixedly connected with the handle body; the shaft core sleeve can be in sliding connection with the mounting sleeve along the axis of the shaft core pipe; the shaft core pipe is fixedly connected with the shaft core sleeve, a mounting channel extending along the axis of the shaft core pipe is formed in the shaft core pipe, and the cutter handle part can be inserted into the shaft core pipe along the mounting channel. The inner side wall of the mounting channel is attached to the outer side face of the cutter handle part so as to limit radial movement of the cutter handle part. According to the technical scheme, the connection firmness between the blade body and the handle body can be improved, and it is ensured that the blade body does not deviate or vibrate in the operation process.

Description

Technical Field

[0001] The present invention relates to the technical field of medical plastic surgery instruments, and in particular to a blade mounting structure and a medical plastic surgery reciprocating saw bending machine. Background Art

[0002] Medical plastic surgery reciprocating saw bending machine refers to a general term for medical plastic surgery mobile phones equipped with a reciprocating saw and whose handle body has a certain curvature; in medical plastic surgery, the medical plastic surgery reciprocating saw bending machine drives the blade body to make a linear reciprocating motion along its own axis to perform a sawing and shaping operation on human bone tissue. In the prior art, the connection strength between the blade body and the handle body is relatively low, so that the blade body deviates and vibrates during the operation, which may lead to medical accidents in serious cases.

[0003] It should be noted that the above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a blade mounting structure and a medical plastic surgery reciprocating saw bender, aiming to improve the connection firmness between the blade body and the handle body to ensure that there is no deviation and vibration of the blade body during the operation.

[0005] To achieve the above-mentioned purpose, the present invention provides a blade mounting structure, which is applied to a medical plastic surgery reciprocating saw bender; the medical plastic surgery reciprocating saw bender comprises a blade body and a handle body, wherein the blade body comprises a blade portion and a handle portion of a cylindrical structure; Specifically, the blade mounting structure includes a mounting sleeve, an axis sleeve and an axis tube which are sequentially sleeved and connected from the outside to the inside; The mounting sleeve is fixedly connected to the handle body; The shaft core sleeve can be slidably connected with the installation sleeve along the axis of the shaft core tube; The shaft core tube is fixedly connected to the shaft core sleeve, and a mounting channel extending along the axis of the shaft core tube is provided inside the shaft core tube, and the handle portion can be inserted into the shaft core tube along the mounting channel, and the inner side wall of the mounting channel and the outer side surface of the handle portion are fitted to each other to limit the radial movement of the handle portion; Among them, a limit piece is provided at the end of the handle part away from the blade part, and a notch part is provided at the connection between the limit piece and the handle part; the blade mounting structure also includes a first positioning block and a second positioning block; the first positioning block is fixedly arranged in the mounting channel, and the first positioning block is used to be embedded in the notch part to limit the axial movement of the handle part; the second positioning block is slidably connected to the mounting channel, and the second positioning block is used to abut the side of the limit piece to limit the circumferential movement of the handle part.

[0006] In one embodiment, an inner recess is provided on the inner side of the mounting sleeve, and a guide groove is provided on the outer side of the shaft core sleeve, and the groove direction of the guide groove is arranged along the axial direction of the shaft core tube; the blade mounting structure includes a guide member, at least a portion of the guide member is embedded in and connected to the inner recess, and at least a portion of the guide member is slidably connected to the guide groove.

[0007] In one embodiment, the guide member is a spherical structure, and the guide member is rotatably connected to the inner recess.

[0008] In one embodiment, an opening portion is provided at the connection between the mounting sleeve and the handle body, and a driving groove is provided on the side of the shaft core sleeve. The driving groove is interconnected with a transmission structure located inside the handle body through the opening portion, so that the transmission structure can drive the shaft core sleeve to perform a linear reciprocating sliding motion relative to the mounting sleeve through the driving groove.

[0009] In one embodiment, a connecting channel is provided between the first positioning block and the mounting channel, a channel cross-sectional area of ​​the connecting channel is larger than a cross-sectional area of ​​the limiting member, and a channel cross-sectional area of ​​the connecting channel is smaller than a cross-sectional area of ​​the shank portion.

[0010] In one embodiment, the projection area of ​​the second positioning block along the axial direction of the shaft core tube is defined as a first projection area, and the projection area of ​​the connecting channel along the axial direction of the shaft core tube is defined as a second projection area, and at least part of the first projection area overlaps with the second projection area.

[0011] In one embodiment, the blade mounting structure also includes a movable sleeve, which is used to slide the second positioning block to a first position or a second position; when the second positioning block slides to the first position, the second positioning block abuts against the side of the limiting member; when the second positioning block slides to the second position, the second positioning block releases the abutment against the side of the limiting member.

[0012] In one embodiment, the movable sleeve is slidably arranged between the shaft core sleeve and the shaft core tube; the movable sleeve includes a coaxially arranged push sleeve ring and a connecting ring, a spring member is sleeved on the connecting ring, a protrusion is provided on the inner side of the shaft core sleeve, and the two ends of the spring member are respectively abutted against the protrusion and the push sleeve ring; a sliding channel is provided between the shaft core sleeve and the shaft core tube along the axial direction of the shaft core tube, a connecting member is slidably arranged in the sliding channel, and the connecting ring is fixedly connected to the second positioning block through the connecting member.

[0013] In one embodiment, at least a portion of the push sleeve ring is exposed outside the shaft core sleeve; and the exposed area of ​​the push sleeve ring is provided with anti-slip textures.

[0014] To achieve the above-mentioned object, the present invention proposes a medical plastic surgery reciprocating saw bender, comprising any of the blade mounting structures described above.

[0015] The technical solution of the present invention is to set the handle part into a cylindrical structure. When the handle part is inserted into the interior of the shaft core tube through the installation channel, the inner side wall of the installation channel and the outer side surface of the handle part fit each other to achieve the purpose of limiting the radial movement of the handle part. At the same time, a first positioning block and a second positioning block are set inside the installation channel. After the handle part is inserted into the installation channel, on the one hand, the first positioning block is embedded in its notch. At this time, the two sides of the first positioning block are respectively abutted with the handle part and the end of the opposite side of the limiting member, so that the handle part cannot move axially under the restriction of the first positioning block; on the other hand, the second positioning block slides to abut against the side of the limiting member, so that the limiting member cannot rotate by the second positioning block, so that the handle part cannot move circumferentially under the restriction of the second positioning block. In summary, the radial movement, axial movement and circumferential movement of the handle part are all restricted, so that the blade body cannot be displaced relative to the shaft core tube, thereby improving the connection firmness between the blade body and the handle body, so as to ensure that there is no deviation and vibration of the blade body during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of the overall structure of an embodiment of a blade mounting structure provided by the present invention; Figure 2 A schematic diagram of the exploded structure of an embodiment of a blade mounting structure provided by the present invention; Figure 3 A schematic diagram of the internal structure of an embodiment of a blade mounting structure provided by the present invention; Figure 4 A schematic diagram of the installation steps of a blade body in an embodiment of a blade installation structure provided by the present invention; Figure 5 A second schematic diagram of the steps for installing a blade body in an embodiment of a blade installation structure provided by the present invention; Figure 6 A third schematic diagram of the steps for installing a blade body in an embodiment of a blade installation structure provided by the present invention; Figure 7 The fourth schematic diagram of the installation steps of the blade body in the first embodiment of the blade installation structure provided by the present invention.

[0018] Description of reference numerals: 100, blade body; 110, blade portion; 120, handle portion; 130, stopper; 140, notch portion; 200, handle body; 210, transmission structure; 300, mounting sleeve; 310, opening portion; 320, inner recess; 400, shaft sleeve; 410, drive groove; 420, guide groove; 430, raised portion; 440, sliding channel; 500, shaft tube; 510, mounting channel; 520, connecting channel; 600, first positioning block; 700, second positioning block; 800, guide member; 900, movable sleeve; 910, push sleeve ring; 920, connecting ring; 930, spring member; 940, connecting member; The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solution in the present invention. Obviously, what is described is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, it should be noted that the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] Medical plastic surgery reciprocating saw bending machine refers to a general term for medical plastic surgery mobile phones equipped with a reciprocating saw and whose handle body has a certain curvature; in medical plastic surgery, the medical plastic surgery reciprocating saw bending machine drives the blade body to make a linear reciprocating motion along its own axis to perform a sawing and shaping operation on human bone tissue. In the prior art, the connection strength between the blade body and the handle body is relatively low, so that the blade body deviates and vibrates during the operation, which may lead to medical accidents in serious cases.

[0023] In order to solve the above technical problem, the present invention proposes a blade installation structure.

[0024] See also Figure 1-3 In one embodiment of the present invention, the blade mounting structure is applied to a medical plastic surgery reciprocating saw bender; the medical plastic surgery reciprocating saw bender comprises a blade body 100 and a handle body 200, wherein the blade body 100 comprises a blade portion 110 and a handle portion 120 of a cylindrical structure; Specifically, the blade mounting structure includes a mounting sleeve 300, an axis sleeve 400 and an axis tube 500 which are sequentially sleeved and connected from the outside to the inside; The mounting sleeve 300 is fixedly connected to the handle body 200; The shaft core sleeve 400 can be slidably connected with the installation sleeve 300 along the axis of the shaft core tube 500; The shaft core tube 500 is fixedly connected to the shaft core sleeve 400. The shaft core tube 500 is provided with a mounting channel 510 extending along its own axis. The handle portion 120 can be inserted into the shaft core tube 500 along the mounting channel 510. The inner side wall of the mounting channel 510 and the outer side surface of the handle portion 120 fit each other to limit the radial movement of the handle portion 120. Among them, a limit piece 130 is provided at the end of the handle part 120 away from the blade part 110, and a notch part 140 is provided at the connection between the limit piece 130 and the handle part 120; the blade mounting structure also includes a first positioning block 600 and a second positioning block 700; the first positioning block 600 is fixedly arranged in the mounting channel 510, and the first positioning block 600 is used to be embedded in the notch part 140 to limit the axial movement of the handle part 120; the second positioning block 700 is slidably connected to the mounting channel 510, and the second positioning block 700 is used to abut the side of the limit piece 130 to limit the circumferential movement of the handle part 120.

[0025] The technical solution of the present invention is to set the handle part 120 into a cylindrical structure. When the handle part 120 is inserted into the interior of the shaft core tube 500 through the installation channel 510, the inner side wall of the installation channel 510 and the outer side surface of the handle part 120 are in contact with each other, so as to achieve the purpose of limiting the radial movement of the handle part 120. At the same time, a first positioning block 600 and a second positioning block 700 are arranged inside the installation channel 510. When the handle part 120 is inserted into the installation channel 510, on the one hand, the first positioning block 600 and the second positioning block 700 are arranged inside the installation channel 510. 00 is embedded into the notch 140 thereof, at which time the two sides of the first positioning block 600 are respectively in contact with the ends of the handle portion 120 and the opposite side of the limiting member 130, so that the handle portion 120 cannot move axially under the restriction of the first positioning block 600; on the other hand, the second positioning block 700 slides to mutually contact with the side of the limiting member 130, so that the limiting member 130 cannot rotate by the second positioning block 700, so that the handle portion 120 cannot move circumferentially under the restriction of the second positioning block 700. In summary, the radial movement, axial movement and circumferential movement of the handle portion 120 are all restricted, so that the blade body 100 cannot be displaced relative to the shaft core tube 500, thereby improving the connection firmness between the blade body 100 and the handle body 200, to ensure that the blade body 100 does not deviate from vibration during the operation.

[0026] Specifically, an opening 310 is provided at the connection between the installation sleeve 300 and the handle body 200, and a driving groove 410 is provided at the side of the shaft core sleeve 400. The driving groove 410 is connected to the transmission structure 210 located inside the handle body 200 through the opening 310, so that the transmission structure 210 can drive the shaft core sleeve 400 to make a linear reciprocating sliding motion relative to the installation sleeve 300 through the driving groove 410. In this way, the transmission structure 210 located inside the handle body 200 is combined with the driving groove 410 to drive the shaft core sleeve 400 to make a linear reciprocating sliding motion relative to the installation sleeve 300. Since the shaft core tube 500 is fixedly connected to the shaft core sleeve 400, and the shaft core tube 500 is fixedly connected to the handle portion 120 of the blade body 100, the blade body 100 is driven to make a linear reciprocating motion along its own axis, so that the blade body 100 can smoothly perform a sawing and shaping operation on human bone tissue.

[0027] As a preferred solution of the above embodiment, an inner recess 320 is provided on the inner side of the mounting sleeve 300, and a guide groove 420 is provided on the outer side of the shaft core sleeve 400, and the groove direction of the guide groove 420 is arranged along the axial direction of the shaft core tube 500; the blade mounting structure includes a guide member 800, at least a portion of the guide member 800 is embedded and connected with the inner recess 320, and at least a portion of the guide member 800 is slidably connected with the guide groove 420. In this way, at least a portion of the guide member 800 is embedded in the inner recess 320 to fix the guide member 800 and the mounting sleeve 300 to each other; at the same time, at least a portion of the guide member 800 is slidably connected in the guide groove 420, and the groove direction of the guide groove 420 is arranged along the axial direction of the shaft core tube 500. Through the combined action of the guide groove 420 and the guide member 800, it is ensured that when the shaft core sleeve 400 slides relative to the mounting sleeve 300, the sliding trajectory of the shaft core sleeve 400 is arranged along the axial direction of the shaft core tube 500, thereby improving the stability of the shaft core sleeve 400 when sliding relative to the mounting sleeve 300.

[0028] Further, the guide member 800 is in a spherical structure, and the guide member 800 is rotatably connected to the inner recess 320. In this way, the guide member 800 is set in a spherical structure, so that the connection between the guide member 800 and the guide groove 420 forms a rolling connection, thereby reducing the friction between the guide member 800 and the guide groove 420, thereby reducing the wear of the guide member 800 and / or the guide groove 420 caused by the long-term reciprocating motion of the shaft core sleeve 400 relative to the installation sleeve 300, which is conducive to extending the service life of the present application.

[0029] As a preferred solution of the above embodiment, a connecting channel 520 is provided between the first positioning block 600 and the installation channel 510, and the channel cross-sectional area of ​​the connecting channel 520 is larger than the cross-sectional area of ​​the stopper 130, and the channel cross-sectional area of ​​the connecting channel 520 is smaller than the cross-sectional area of ​​the handle 120. Such a configuration enables the connecting channel 520 to allow the stopper 130 to pass through, while the handle 120 cannot pass through the connecting channel 520, thereby ensuring that the subsequent first positioning block 600 can be embedded in the notch 140 between the stopper 130 and the handle 120.

[0030] Furthermore, the projection area of ​​the second positioning block 700 along the axial direction of the shaft core tube 500 is defined as a first projection area, and the projection area of ​​the connecting channel 520 along the axial direction of the shaft core tube 500 is defined as a second projection area, and at least part of the first projection area overlaps with the second projection area. By such arrangement, when the limiting member 130 passes through the connecting channel 520, its free end will inevitably abut against the end of the second positioning block 700, and as the handle portion 120 continues to be inserted, the limiting member 130 will drive the second positioning block 700 to move in the insertion direction of the handle portion 120; when the handle portion 120 moves to abut against the first positioning block 600, the blade body 100 is rotated by a certain angle, so that on the one hand, its notch portion 140 and the first positioning block 600 are interlocked, and on the other hand, the abutment of the limiting member 130 on the second positioning block 700 is released, so that the second positioning block 700 can move in the withdrawal direction of the handle portion 120, and the second positioning block 700 and the side of the limiting member 130 are abutted against each other.

[0031] As a preferred solution of the above embodiment, the blade mounting structure further includes a movable sleeve 900, which is used to slide the second positioning block 700 to the first position or the second position; when the second positioning block 700 slides to the first position, the second positioning block 700 and the side of the stopper 130 abut against each other; when the second positioning block 700 slides to the second position, the second positioning block 700 is released from abutting against the side of the stopper 130. With such a configuration, it is necessary to release the restriction of the second positioning block 700 on the stopper 130 when replacing the blade body 100, so that the handle portion 120 can rotate circumferentially until its stopper 130 is aligned with the connecting channel 520, so that the stopper 130 can pass through the connecting channel 520 to pull the handle portion 120 out of the mounting channel 510. Therefore, by providing the movable sleeve 900, the operator can slide the second positioning block 700 to the second position through the movable sleeve 900, so that the second positioning block 700 is released from abutting against the side of the limiting member 130, thereby subsequently separating the blade body 100 and the handle body 200 from each other.

[0032] Furthermore, the movable sleeve 900 is slidably arranged between the shaft core sleeve 400 and the shaft core tube 500; the movable sleeve 900 includes a coaxially arranged push sleeve ring 910 and a connecting ring 920, a spring member 930 is sleeved on the connecting ring 920, a protrusion 430 is provided on the inner side of the shaft core sleeve 400, and the two ends of the spring member 930 are respectively abutted against the protrusion 430 and the push sleeve ring 910; a sliding channel 440 is provided between the shaft core sleeve 400 and the shaft core tube 500 and is arranged along the axial direction of the shaft core tube 500, a connecting member 940 is slidably arranged in the sliding channel 440, and the connecting ring 920 is fixedly connected to the second positioning block 700 through the connecting member 940. In this way, the movable sleeve 900 is slidably arranged between the shaft core sleeve 400 and the shaft core tube 500, so that the movable sleeve 900 can only slide along the axial direction of the shaft core tube 500 under the outer and inner limiting effects of the shaft core sleeve 400 and the shaft core tube 500. At the same time, the spring member 930 is used as one of the power sources for the movement of the push sleeve ring 910. When the operator slides the push sleeve ring 910 in the insertion direction of the handle 120 to compress the spring member 930, and then the operator releases the force on the push sleeve ring 910, the push sleeve ring 910 can slide in the direction of the handle 120 under the elastic force of the spring member 930. Since the second positioning block 700 is fixedly connected to the connecting ring 920 through the connecting member 940, the second positioning block 700 slides in the direction of the handle 120, that is, the second positioning block 700 moves from the second position to the first position, so as to ensure the smooth implementation of the technical solution of the present application.

[0033] Furthermore, at least a portion of the push collar 910 is exposed outside the shaft core sleeve 400 ; this arrangement facilitates the operator to push the push collar 910 through the exposed area, which is beneficial to speeding up the disassembly and assembly efficiency of the blade body 100 .

[0034] Furthermore, the exposed area of ​​the push collar 910 is provided with anti-skid patterns (not shown in the drawings). In this way, the anti-skid patterns can increase the friction between the operator and the push collar 910, so that the operator can push the push collar 910 easily, thereby sliding the second positioning block 700 to the second position, so as to release the mutual contact between the second positioning block 700 and the stopper 130.

[0035] The following is a detailed description of the disassembly and assembly process of the blade body 100 and the handle body 200 in combination with the above embodiments: When installing the blade body 100: Step 1: Refer to the attached Figure 4 , insert the handle portion 120 of the blade body 100 into the installation channel 510 of the shaft core tube 500, because the inner side wall of the installation channel 510 and the outer side surface of the handle portion 120 are in contact with each other, so as to limit the radial movement of the handle portion 120; Step 2: Refer to the attached Figure 5 As the handle 120 is further inserted, the limiting member 130 passes through the connecting passage 520 until the first positioning block 600 and the end of the handle 120 abut against each other; during this period, the limiting member 130 abuts against the end of the second positioning block 700 after passing through the connecting passage 520, and as the handle 120 is further inserted, the limiting member 130 drives the second positioning block 700 to move in the insertion direction of the handle 120, during which the second positioning block 700 drives the push ring 910 to move in the insertion direction of the handle 120 synchronously through the connecting member 940, thereby compressing the spring member 930 sleeved on the connecting ring 920; Step 3: Refer to the attached Figure 6-7 , the blade body 100 is rotated by a certain angle, on the one hand, the notch portion 140 thereof is engaged with the first positioning block 600 to limit the axial movement of the handle portion 120; on the other hand, the abutment of the limiting member 130 on the second positioning block 700 is released, so that the second positioning block 700 and the push sleeve ring 910 move together in the pulling-out direction of the handle portion 120 under the elastic force of the spring member 930, so that the second positioning block 700 and the side of the limiting member 130 abut against each other; since the second positioning block 340 is connected to the connecting member 364, and the connecting member 364 is restricted by the sliding channel 365 to only slide along the axial direction of the shaft core tube 320, the second positioning block 700 cannot move circumferentially, thereby limiting the circumferential movement of the handle portion 120; in this way, the installation operation of the blade body 100 is completed.

[0036] When the blade body 100 is disassembled: Step ④: Push the push ring 910 in the insertion direction of the handle 120, and use the push ring 910 to push the sliding connection member 940. Since the connection member 940 is fixedly connected to the second positioning block 700, the second positioning block 700 also moves in the insertion direction of the handle 120 synchronously, so that the second positioning block 700 releases the restriction on the limiter 130, that is, the second positioning block 700 releases the circumferential movement restriction on the handle 120; Step ⑤: the blade body 100 is moved circumferentially to rotate until the stopper 130 is aligned with the connecting channel 520 , at which time the notch portion 140 is released from the mutual engagement with the first positioning block 600 , that is, the first positioning block 600 releases the restriction on the axial movement of the handle portion 120 ; Step ⑥: Move the handle portion 120 in the pulling-out direction. At this time, the limit member 130 can pass through the connecting channel 520 until the handle portion 120 and the shaft core tube 500 are separated from each other, thereby completing the disassembly operation of the blade body 100; then the push ring 910 moves in the pulling-out direction of the handle portion 120 under the elastic force of the spring for reset. During the reset process, the push ring 910 also drives the second positioning block 700 to move in the pulling-out direction of the handle portion 120 through the connecting member 940 for reset.

[0037] This embodiment also discloses a medical plastic surgery reciprocating saw bender, including the blade mounting structure of any of the above embodiments. For the specific structure of the blade mounting structure, reference can be made to the above embodiments. Since the medical plastic surgery reciprocating saw bender adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0038] It should be noted that the blade mounting structure and other contents of the medical plastic surgery reciprocating saw bender disclosed in the present invention are prior art and will not be described in detail here.

[0039] The above are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any direct / indirect application of the present invention in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A blade mounting structure, applied to a medical plastic surgery reciprocating saw bender; the medical plastic surgery reciprocating saw bender comprises a blade body and a handle body, wherein the blade body comprises a blade portion and a cylindrical handle portion; characterized in that: The blade mounting structure comprises a mounting sleeve, an axis sleeve and an axis tube which are sequentially sleeved and connected from the outside to the inside; The mounting sleeve is fixedly connected to the handle body; The shaft core sleeve can be slidably connected with the installation sleeve along the axis of the shaft core tube; The shaft core tube is fixedly connected to the shaft core sleeve, and a mounting channel extending along the axis of the shaft core tube is provided inside the shaft core tube, and the handle portion can be inserted into the shaft core tube along the mounting channel, and the inner side wall of the mounting channel and the outer side surface of the handle portion are fitted to each other to limit the radial movement of the handle portion; Among them, a limit piece is provided at the end of the handle part away from the blade part, and a notch part is provided at the connection between the limit piece and the handle part; the blade mounting structure also includes a first positioning block and a second positioning block; the first positioning block is fixedly arranged in the mounting channel, and the first positioning block is used to be embedded in the notch part to limit the axial movement of the handle part; the second positioning block is slidably connected to the mounting channel, and the second positioning block is used to abut the side of the limit piece to limit the circumferential movement of the handle part.

2. The blade mounting structure according to claim 1, characterized in that: An inner recess is provided on the inner side of the mounting sleeve, and a guide groove is provided on the outer side of the shaft core sleeve, wherein the groove direction of the guide groove is arranged along the axial direction of the shaft core tube; the blade mounting structure comprises a guide member, at least a portion of the guide member is embedded in and connected to the inner recess, and at least a portion of the guide member is slidably connected to the guide groove.

3. The blade mounting structure according to claim 2, characterized in that: The guide member is in a spherical structure and is rotatably connected to the inner concave portion.

4. The blade mounting structure according to claim 1, characterized in that: An opening portion is provided at the connection between the mounting sleeve and the handle body, and a driving groove is provided on the side of the shaft core sleeve. The driving groove is connected to a transmission structure located inside the handle body through the opening portion, so that the transmission structure can drive the shaft core sleeve to perform a linear reciprocating sliding motion relative to the mounting sleeve through the driving groove.

5. The blade mounting structure according to claim 1, characterized in that: A connecting channel is provided between the first positioning block and the mounting channel, the channel cross-sectional area of ​​the connecting channel is larger than the cross-sectional area of ​​the limiting member, and the channel cross-sectional area of ​​the connecting channel is smaller than the cross-sectional area of ​​the shank portion.

6. The blade mounting structure according to claim 5, characterized in that: The projection area of ​​the second positioning block along the axial direction of the shaft core tube is defined as a first projection area, and the projection area of ​​the connecting channel along the axial direction of the shaft core tube is defined as a second projection area, and at least part of the first projection area overlaps with the second projection area.

7. The blade mounting structure according to claim 1, characterized in that: The blade mounting structure also includes a movable sleeve, which is used to slide the second positioning block to a first position or a second position; when the second positioning block slides to the first position, the second positioning block abuts against the side of the limiting member; when the second positioning block slides to the second position, the second positioning block releases the abutment against the side of the limiting member.

8. The blade mounting structure according to claim 7, characterized in that: The movable sleeve is slidably arranged between the shaft core sleeve and the shaft core tube; the movable sleeve includes a coaxially arranged push sleeve ring and a connecting ring, a spring member is sleeved on the connecting ring, a protrusion is provided on the inner side of the shaft core sleeve, and the two ends of the spring member are respectively abutted against the protrusion and the push sleeve ring; a sliding channel arranged along the axial direction of the shaft core tube is provided between the shaft core sleeve and the shaft core tube, a connecting member is slidably arranged in the sliding channel, and the connecting ring is fixedly connected to the second positioning block through the connecting member.

9. The blade mounting structure according to claim 8, characterized in that: At least part of the push sleeve ring is exposed outside the shaft core sleeve; and the exposed area of ​​the push sleeve ring is provided with anti-slip lines.

10. A medical plastic surgery reciprocating saw bender, characterized in that: It comprises a blade mounting structure as claimed in any one of claims 1 to 9.

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