Medical reshaping reciprocating sawing machine

Abstract

The utility model discloses a medical plastic reciprocating saw handpiece, and relates to the technical field of medical plastic instruments. The medical reshaping reciprocating sawing machine comprises a cutter body, a handle body and a transmission structure, wherein the cutter body comprises a blade part and a cutter handle part which are connected with each other; the front end of the handle body is used for being connected with the knife handle part, and the rear end of the handle body is used for being connected with an external rotation driving device. The transmission structure is mounted in the handle body, so that the rotary driving device can drive the cutter body to do linear reciprocating motion along the axis of the cutter body through the transmission structure; the transmission structure comprises an eccentric assembly and a transmission shaft pipe, and the eccentric assembly comprises a frame part and an eccentric wheel part arranged on the frame-shaped inner side of the frame part. According to the technical scheme provided by the utility model, the situation that the reciprocating saw is stuck during operation can be reduced, so that the stability of an operation process is improved, and medical negligence is avoided.

Description

Technical Field

[0001] This utility model relates to the field of medical plastic surgery instruments, and in particular to a medical plastic surgery reciprocating saw. Background Technology

[0002] In cosmetic surgery, a medical surgical handpiece equipped with a reciprocating saw is typically used. The handpiece drives the reciprocating saw to move linearly back and forth along its own axis to remove and reshape bone tissue. However, in current technology, the internal transmission structure of these reciprocating surgical handpieces is complex, making it prone to jamming during operation. This can affect the smoothness of the surgical procedure and, in severe cases, may lead to medical accidents.

[0003] It should be noted that the above content is only used to help understand the technical solution of this utility model, and does not represent an admission that the above content is prior art. Utility Model Content

[0004] The main purpose of this invention is to propose a medical orthopedic reciprocating saw handpiece, which aims to reduce the occurrence of jamming during operation, thereby improving the stability of the surgical process and avoiding medical accidents.

[0005] To achieve the above objectives, this utility model proposes a medical plastic surgery reciprocating saw handpiece;

[0006] Specifically, the medical plastic surgery reciprocating saw includes:

[0007] The tool body includes a blade portion and a shank portion connected together;

[0008] The handle body has a front end for connecting to the knife handle portion and a rear end for connecting to an external rotary drive device.

[0009] A transmission structure is installed inside the handle body so that the rotary drive device can drive the tool body to perform linear reciprocating motion along its own axis through the transmission structure.

[0010] Specifically, the transmission structure includes an eccentric assembly and a transmission shaft tube; the eccentric assembly includes a frame and an eccentric wheel disposed on the inner side of the frame; the inner side of the frame has an active space for the eccentric wheel to perform eccentric rotational motion; the central axis and the rotation axis of the eccentric wheel are not on the same straight line; the eccentric wheel can perform eccentric rotational motion under the drive of the rotational drive device, and at least part of the outer surface of the eccentric wheel remains in contact with the inner surface of the frame during the eccentric rotational motion; the transmission shaft tube can be slidably connected to the inside of the handle body along its own axis; the front end of the transmission shaft tube is connected to the handle portion, and the rear end of the transmission shaft tube is fixedly connected to the frame.

[0011] In one embodiment, the eccentric assembly further includes an eccentric wheel shaft and two opposing first bearing seats, the eccentric wheel being fitted onto the eccentric wheel shaft; both ends of the eccentric wheel shaft are rotatably connected to the handle body via the first bearing seats.

[0012] In one embodiment, the transmission structure includes a gear assembly, and the rotary drive device drives the eccentric wheel to perform eccentric reciprocating motion through the gear assembly;

[0013] Specifically, the gear assembly includes a first gear and a second gear, the first gear and the second gear meshing and driving each other at right angles; the first gear is connected to the drive end of the rotary drive device, and the second gear is mounted on the eccentric wheel shaft.

[0014] In one embodiment, a connecting structure is installed inside the handle body, the connecting structure being used to connect the transmission structure to the drive end of the rotary drive device;

[0015] Specifically, the connection structure includes a connecting sleeve and a connecting shaft tube arranged coaxially. The rear end of the connecting sleeve is used to connect to the driving end of the rotary drive device. The front end of the connecting sleeve is slidably sleeved on the rear end of the connecting shaft tube, and the connecting sleeve can slide relative to the connecting shaft tube. The front end of the connecting shaft tube is fixedly connected to the first gear. A fixing ring is fixedly sleeved on the connecting shaft tube, and a first spring is sleeved on the connecting shaft tube. The first spring is disposed between the fixing ring and the rear end of the connecting sleeve.

[0016] In one embodiment, the connecting structure further includes a second bearing housing, which is fitted onto the connecting shaft tube; the connecting shaft tube is rotatably connected to the handle body via the second bearing housing.

[0017] In one embodiment, a limiting groove is formed at the front end of the connecting sleeve, and the groove direction of the limiting groove is arranged along the axial direction of the connecting sleeve; a limiting pin is fixedly provided at the rear end of the connecting shaft tube, and the limiting pin is slidably connected in the limiting groove.

[0018] In one embodiment, the medical orthopedic reciprocating saw includes a mounting structure for fixing the handle portion to the drive shaft tube.

[0019] Specifically, the mounting structure includes a mounting cavity disposed at the front end of the drive shaft tube, the mounting cavity being used to sleeve the tool holder portion, and the inner side of the mounting cavity and the outer side of the tool holder portion fitting together to restrict the radial movement of the tool holder portion; wherein, the end of the tool holder portion away from the blade portion is provided with a limiting member, and the connection between the limiting member and the tool holder portion is provided with a notch portion; the mounting structure further includes a first positioning block and a second positioning block; the first positioning block is fixedly disposed in the mounting cavity, and the first positioning block is used to be embedded in the notch portion to restrict the axial movement of the tool holder portion; the second positioning block is slidably connected to the mounting cavity, and the second positioning block is used to abut against the side of the limiting member to restrict the circumferential movement of the tool holder portion.

[0020] In one embodiment, a preset gap is provided between the first positioning block and the mounting cavity, the cross-sectional area of ​​the preset gap being larger than the cross-sectional area of ​​the limiting member, and the cross-sectional area of ​​the preset gap being smaller than the cross-sectional area of ​​the handle portion.

[0021] In one embodiment, the mounting structure further includes a sliding ring slidably sleeved on the drive shaft tube, the drive shaft tube having a sliding groove, the groove being oriented along the axial direction of the drive shaft tube; a connecting pin is slidably connected in the sliding groove, and the sliding ring is fixedly connected to the second positioning block via the connecting pin; a second spring is provided in the mounting cavity, the second spring being disposed between the second positioning block and the rear end of the drive shaft tube.

[0022] In one embodiment, the mounting structure further includes a push sleeve assembly for the operator to slide the sliding ring. Specifically, the push sleeve assembly includes a guide sleeve slidably fitted onto the drive shaft tube, and a push sleeve slidably fitted onto the front end of the guide sleeve. At least a portion of the push sleeve is located outside the handle body, and the guide sleeve is fixedly connected to the handle body. The guide sleeve has a guide groove, the groove being axially aligned with the drive shaft tube. A push pin is slidably connected in the guide groove, one end of which is fixedly connected to the push sleeve, and the other end of which abuts against the end of the sliding ring furthest from the second spring.

[0023] In one embodiment, a limiting ring is provided at the rear end of the guide sleeve, and a third spring is sleeved on the guide sleeve, the third spring being disposed between the pusher assembly and the limiting ring;

[0024] In one embodiment, the exposed area of ​​the push kit is provided with anti-slip texture.

[0025] The technical solution of this utility model is to set up a transmission structure so that the rotary drive device can drive the tool body to make linear reciprocating motion along its own axis, so that the blade part can be used to saw and shape human bone tissue. The transmission structure includes an eccentric component and a transmission shaft tube. The eccentric component includes a frame and an eccentric wheel component disposed on the inner side of the frame of the frame. The central axis and the rotation axis of the eccentric wheel component are not on the same straight line. When the rotary drive device drives the eccentric wheel component to perform eccentric rotational motion, since at least part of the outer surface of the eccentric wheel component is in contact with the inner surface of the frame component, and the transmission shaft tube is slidably connected to the inside of the handle body along its own axis, the frame component can only move along the front and back direction of the transmission shaft tube under the multiple constraints of the eccentric wheel component and the transmission shaft tube, thereby driving the transmission shaft tube to make linear reciprocating motion along its own axis. Since the transmission shaft tube is connected to the tool holder, the purpose of driving the tool body to make linear reciprocating motion along its own axis is achieved. Furthermore, in the aforementioned transmission structure, the inner side of the frame component is provided with an active space for the eccentric wheel component to perform eccentric rotational motion. This active space can also serve as an adjustment space for adjusting the relative position of the eccentric wheel component and the frame component, thereby enabling small-amplitude position adjustments within the transmission structure to reduce the occurrence of jamming during operation of the reciprocating saw; thus improving the stability of the surgical process and avoiding medical accidents. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of one embodiment of the medical plastic surgery reciprocating saw provided by this utility model;

[0028] Figure 2 A second structural schematic diagram of an embodiment of the medical plastic surgery reciprocating saw provided by this utility model;

[0029] Figure 3 A schematic diagram of the transmission and connection structures in one embodiment of the medical plastic surgery reciprocating saw provided by this utility model;

[0030] Figure 4 A schematic diagram of the eccentric component in one embodiment of the medical plastic surgery reciprocating saw provided by this utility model;

[0031] Figure 5 A schematic diagram of the connection structure in one embodiment of the medical plastic surgery reciprocating saw provided by this utility model;

[0032] Figure 6 An exploded structural diagram of the connection structure in one embodiment of the medical plastic surgery reciprocating saw provided by this utility model;

[0033] Figure 7 A schematic diagram of the mounting structure in one embodiment of the medical plastic surgery reciprocating saw handpiece provided by this utility model;

[0034] Figure 8 An exploded view of the mounting structure in one embodiment of the medical plastic surgery reciprocating saw handpiece provided by this utility model;

[0035] Figure 9 Internal structural diagram of the mounting structure in one embodiment of the medical plastic surgery reciprocating saw handpiece provided by this utility model;

[0036] Figure 10 An exploded view of the transmission shaft tube in one embodiment of the medical plastic reciprocating saw provided by this utility model;

[0037] Figure 11 One of the installation steps of the blade body in an embodiment of the medical plastic reciprocating saw provided by this utility model;

[0038] Figure 12 The second embodiment of the medical plastic surgery reciprocating saw provided by this utility model shows the installation steps of the blade body.

[0039] Figure 13 The third step of the installation process of the blade body in one embodiment of the medical plastic reciprocating saw provided by this utility model;

[0040] Figure 14 The fourth figure shows the installation steps of the blade body in one embodiment of the medical plastic reciprocating saw provided by this utility model.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100. Tool body; 110. Blade section; 120. Handle section; 130. Limiting component; 131. Notch section; 200. Handle body; 300. Transmission structure; 400. Gear assembly; 410. First gear; 420. Second gear; 500. Eccentric assembly; 510. Frame component; 511. Movable space; 520. Eccentric wheel component; 530. Eccentric wheel shaft; 540. First bearing seat; 600. Transmission shaft tube; 610. Mounting cavity; 620. Sliding groove; 700. Connecting structure; 710. Connecting sleeve; 7 11. Limiting groove; 720. Connecting shaft tube; 721. Limiting pin; 730. Fixing ring; 740. First spring; 750. Second bearing seat; 800. Mounting structure; 810. First positioning block; 820. Second positioning block; 830. Preset gap; 840. Sliding ring; 850. Connecting pin; 860. Second spring; 900. Push sleeve assembly; 910. Guide sleeve; 911. Guide groove; 920. Push assembly; 921. Anti-slip texture; 930. Pushing pin; 940. Limiting ring; 950. Third spring;

[0043] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0045] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0046] Furthermore, it should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0047] In cosmetic surgery, a medical surgical handpiece equipped with a reciprocating saw is typically used. This handpiece drives the reciprocating saw to move at high speed along its axis, reshaping and removing bone tissue. However, the internal transmission structure of current medical surgical reciprocating saw handpieces is complex, making it prone to jamming during operation. This can affect the smoothness of the surgical procedure and, in severe cases, lead to medical accidents.

[0048] To solve the above-mentioned technical problems, this utility model proposes a medical plastic surgery reciprocating saw handpiece.

[0049] Please see Figure 1-3 In one embodiment of this utility model, the medical plastic surgery reciprocating saw includes:

[0050] The tool body 100 includes a blade portion 110 and a shank portion 120 connected to each other.

[0051] The handle body 200 has a front end for connecting to the handle portion 120 and a rear end for connecting to an external rotary drive device (not shown in the attached figure). For ease of understanding, this application defines the direction in which the handle body 200 is used to connect to the handle portion 120 as the front end direction and the direction in which the handle body 200 is used to connect to the rotary drive device as the rear end direction.

[0052] The transmission structure 300 is installed inside the handle body 200 so that the rotary drive device can drive the tool body 100 to perform linear reciprocating motion along its own axis through the transmission structure 300.

[0053] Specifically, see the attached document. Figure 3-4 The transmission structure 300 includes an eccentric assembly 500 and a transmission shaft tube 600. The eccentric assembly 500 includes a frame 510 and an eccentric wheel 520 disposed inside the frame of the frame 510. The inner side of the frame of the frame 510 is provided with an active space 511 for the eccentric wheel 520 to perform eccentric rotation. The eccentric wheel 520 can perform eccentric rotation under the drive of the rotation drive device, and at least part of the outer side of the eccentric wheel 520 is in contact with the inner side of the frame 510 during the eccentric rotation. The transmission shaft tube 600 can be slidably connected to the inside of the handle body 200 along its own axis. The front end of the transmission shaft tube 600 is connected to the handle portion 120, and the rear end of the transmission shaft tube 600 is fixedly connected to the frame 510.

[0054] The technical solution of this utility model is to set up a transmission structure 300 so that the rotary drive device can drive the cutter body 100 to perform linear reciprocating motion along its own axis, so that the blade part 110 can be used to saw and shape human bone tissue. The transmission structure 300 includes an eccentric component 500 and a transmission shaft tube 600. The eccentric component 500 includes a frame part 510 and an eccentric wheel part 520 disposed on the inner side of the frame part 510. The central axis and the rotation axis of the eccentric wheel part 520 are not on the same straight line. When the rotary drive device drives the eccentric wheel part 520 to perform eccentric rotational motion, at least part of the outer side of the eccentric wheel part 520 is in contact with the inner side of the frame part 510, and the transmission shaft tube 600 is slidably connected to the inside of the handle body 200 along its own axis. This allows the frame part 510 to be in contact with the inner side of the eccentric wheel part 520. Under the multiple constraints of 20 and the transmission shaft tube 600, it can only move along the front and rear direction of the transmission shaft tube 600, thereby driving the transmission shaft tube 600 to make linear reciprocating motion along its own axis; since the transmission shaft tube 600 is connected to the handle part 120, it can achieve the purpose of driving the tool body 100 to make linear reciprocating motion along its own axis; furthermore, in the above-mentioned transmission structure 300, since the inner side of the frame part 510 is provided with an active space 511 for the eccentric wheel part 520 to perform eccentric rotational motion, the active space 511 can also serve as an adjustment space for the relative position adjustment of the eccentric wheel part 520 and the frame part 510, thereby enabling small-amplitude position adjustments inside the transmission structure 300 to reduce the occurrence of jamming during operation of the reciprocating saw; thereby improving the stability of the surgical process and avoiding the occurrence of medical accidents.

[0055] Further, see Appendix Figure 3-4 The eccentric assembly 500 also includes an eccentric axle 530 and two opposing first bearing seats 540. The eccentric wheel 520 is fitted onto the eccentric axle 530. Both ends of the eccentric axle 530 are rotatably connected to the handle body 200 via the first bearing seats 540. This configuration, with the eccentric wheel 520 fitted onto the eccentric axle 530 and both ends of the eccentric axle 530 connected to the first bearing seats 540, allows the eccentric wheel 520 to smoothly rotate eccentrically relative to the handle body 200, ensuring the successful implementation of the technical solution of this application.

[0056] Furthermore, the transmission structure 300 includes a gear assembly 400, through which the rotary drive device drives the eccentric wheel 520 to perform eccentric reciprocating motion; wherein, the specific structure of the aforementioned gear assembly 400 is varied, and in this embodiment, refer to the attached diagram. Figure 3-4The gear assembly 400 includes a first gear 410 and a second gear 420, which mesh and are perpendicular to each other. The first gear 410 is connected to the drive end of the rotary drive device, and the second gear 420 is mounted on the eccentric wheel shaft 530. This configuration, using the combination of the first gear 410 and the second gear 420 to form the gear assembly 400, redirects the rotational driving force of the rotary drive device, enabling the rotary drive device to drive the eccentric wheel shaft 530 to rotate. This, in turn, drives the eccentric wheel component 520 to perform eccentric rotational motion via the eccentric wheel shaft 530. This embodiment features a simple structure and strong practicality.

[0057] As a preferred embodiment of the above embodiments, a connecting structure 700 is installed inside the handle body 200. The connecting structure 700 is used to connect the transmission structure 300 to the drive end of the rotary drive device. Specifically, refer to the attached drawing. Figure 5-6 The connecting structure 700 includes a connecting sleeve 710 and a connecting shaft tube 720 arranged coaxially. The rear end of the connecting sleeve 710 is used to connect to the driving end of the rotary drive device. The front end of the connecting sleeve 710 is slidably sleeved on the rear end of the connecting shaft tube 720, and the connecting sleeve 710 can slide relative to the connecting shaft tube 720. The front end of the connecting shaft tube 720 is fixedly connected to the first gear 410. A fixing ring 730 is fixedly sleeved on the connecting shaft tube 720, and a first spring 740 is sleeved on the connecting shaft tube 720. The first spring 740 is disposed between the fixing ring 730 and the rear end of the connecting sleeve 710. With this configuration, the first spring 740 provides a certain elastic movement space between the connecting sleeve 710 and the connecting shaft tube 720. Thus, when the rotary drive device is connected to the rear end of the connecting sleeve 710, the connecting sleeve 710 can move forward a short distance along the connecting shaft tube 720. In other words, there is a buffer space between the connecting sleeve 710 and the connecting shaft tube 720, which avoids rigid contact between the rotary drive device and the handle body 200, thus preventing damage to the transmission structure 300.

[0058] Furthermore, the connecting structure 700 also includes a second bearing seat 750, which is fitted onto the connecting shaft tube 720. The connecting shaft tube 720 is rotatably connected to the handle body 200 through the second bearing seat 750. With this configuration, the connecting shaft tube 720 can rotate smoothly relative to the handle body 200 through the second bearing seat 750, resulting in a simple structure and strong practicality.

[0059] Furthermore, a limiting groove 711 is formed at the front end of the connecting sleeve 710, and the groove direction of the limiting groove 711 is arranged along the axial direction of the connecting sleeve 710; a limiting pin 721 is fixedly provided at the rear end of the connecting shaft tube 720, and the limiting pin 721 is slidably connected in the limiting groove 711. This arrangement serves two purposes: firstly, since the limiting pin 721 is fixedly provided on the connecting shaft tube 720 and its end is located in the limiting groove 711 of the connecting sleeve 710, when the rotary drive device drives the connecting sleeve 710 to rotate, the limiting pin 721 can also drive the connecting shaft tube 720 to rotate, ensuring that the rotary drive device can smoothly drive the first gear 410 to rotate; secondly, since the limiting pin 721 is restricted to slide in the limiting groove 711, the displacement of the connecting sleeve 710 relative to the connecting shaft tube 720 is limited, so that the connecting sleeve 710 and the connecting shaft tube 720 form a whole, preventing them from separating due to excessive displacement.

[0060] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 7-10The aforementioned medical orthopedic reciprocating saw includes a mounting structure 800, which is used to fix the handle portion 120 to the drive shaft tube 600. Specifically, the mounting structure 800 includes a mounting cavity 610 disposed at the front end of the drive shaft tube 600. The mounting cavity 610 is used to sleeve the handle portion 120, and the inner surface of the mounting cavity 610 and the outer surface of the handle portion 120 fit together to restrict the radial movement of the handle portion 120. A limiting member is provided at the end of the handle portion 120 away from the blade portion 110. 130, a notch 131 is provided at the connection between the limiting member 130 and the tool holder portion 120; the mounting structure 800 also includes a first positioning block 810 and a second positioning block 820; the first positioning block 810 is fixedly disposed in the mounting cavity 610, and the first positioning block 810 is used to be embedded into the notch 131 to restrict the axial movement of the tool holder portion 120; the second positioning block 820 is slidably connected to the mounting cavity 610, and the second positioning block 820 is used to abut against the side of the limiting member 130 to restrict the circumferential movement of the tool holder portion 120. With this configuration, the tool holder 120 is made into a cylindrical structure. When the tool holder 120 is fitted into the mounting cavity 610, the inner side of the mounting cavity 610 fits against the outer side of the tool holder 120, thus restricting the radial movement of the tool holder 120. Simultaneously, a first positioning block 810 and a second positioning block 820 are provided inside the mounting cavity 610. After the tool holder 120 is installed into the mounting cavity 610, on the one hand, the first positioning block 810 is embedded in the notch 131. At this time, both sides of the first positioning block 810 abut against the opposite ends of the tool holder 120 and the limiting member 130, respectively, preventing the tool body 100 from axially moving under the restriction of the first positioning block 810. On the other hand, the second positioning block 820 slides to abut against the side of the limiting member 130. Due to the obstruction of the second positioning block 820, the limiting member 130 cannot rotate along the axis of the tool holder 120, thus restricting the circumferential movement of the tool holder 120. In summary, the radial, axial, and circumferential movements of the tool holder 120 are all restricted, preventing the tool body 100 from displacing relative to the transmission shaft tube 600, thus ensuring the strong connection between the tool body 100 and the transmission structure 300.

[0061] Furthermore, a preset gap 830 is provided between the first positioning block 810 and the mounting cavity 610. The cross-sectional area of ​​the preset gap 830 is larger than that of the limiting member 130, and smaller than that of the tool holder portion 120. This arrangement allows the limiting member 130 to pass through the preset gap 830, while preventing the tool holder portion 120 from passing through it. After the limiting member 130 passes through the preset gap 830, the tool body 100 is rotated by a certain angle, causing the notch 131 of the limiting member 130 to engage with the first positioning block 810, thereby achieving the purpose of the first positioning block 810 restricting the axial movement of the tool holder portion 120.

[0062] Furthermore, the mounting structure 800 also includes a sliding ring 840 slidably sleeved on the drive shaft tube 600. The drive shaft tube 600 has a sliding groove 620, and the groove of the sliding groove 620 is arranged along the axial direction of the drive shaft tube 600. A connecting pin 850 is slidably connected in the sliding groove 620, and the sliding ring 840 is fixedly connected to the second positioning block 820 through the connecting pin 850. A second spring 860 is provided in the mounting cavity 610, and the second spring 860 is disposed between the second positioning block 820 and the rear end of the drive shaft tube 600. With this configuration, when the tool holder 120 is inserted into the mounting cavity 610, its limiting member 130 passes through the preset gap 830 and abuts against the end of the second positioning block 820. As the tool holder 120 continues to be inserted, the limiting member 130 drives the second positioning block 820 to move towards the rear end of the drive shaft tube 600, during which the second positioning block 820 compresses the second spring 860. When the tool body 100 rotates a certain angle so that the notch 131 of the limiting member 130 engages with the first positioning block 810, the limiting member 130 is rotated to the point where it no longer abuts against the end of the second positioning block 820, and the second positioning block 820, lacking the limiting member, is thus secured. The second positioning block 820 abuts against the limiting member 130, thereby moving towards the front end of the transmission shaft tube 600 under the elastic force of the second spring 860, so that the side of the second positioning block 820 abuts against the limiting member 130. Since the second positioning block 820 is connected to the sliding ring 840 through the connecting pin 850, and the connecting pin 850 is restricted to sliding in the sliding groove 620 of the transmission shaft tube 600, the movement trajectory of the second positioning block 820 can only move along the axial direction of the transmission shaft tube 600, and cannot move circumferentially. Thus, the limiting member 130 abutted against by the second positioning block 820 cannot move circumferentially, so as to achieve the purpose of restricting the circumferential movement of the tool holder 120.

[0063] As an alternative to the connecting pin, in another embodiment, the mounting structure can be designed to include a connecting bolt and a connecting nut. The connecting bolt passes sequentially through the sliding groove, the sliding ring, and the second positioning block before being threaded onto the connecting nut. This arrangement allows the sliding ring and the second positioning block to combine into a single unit through the combination of the connecting bolt and the connecting nut, enabling sliding movement along the sliding groove. Understandably, through holes are provided in the sliding ring and the second positioning block for the connecting bolt to pass through, ensuring that the connecting bolt can smoothly pass through the moving ring and the second positioning block.

[0064] As a preferred embodiment of the above embodiments, refer to the appendix. Figure 7-10The mounting structure 800 also includes a push sleeve assembly 900, which allows the operator to slide the sliding ring 840. This arrangement is designed so that when replacing the tool body 100, the restriction of the second positioning block 820 on the limiting member 130 needs to be released first, allowing the tool holder 120 to rotate circumferentially until its limiting member 130 aligns with the preset gap 830, so that the limiting member 130 can pass through the preset gap 830 and pull the tool holder 120 out of the drive shaft tube 600. Therefore, the operator needs to slide the sliding ring 840 to move the second positioning member towards the rear end of the drive shaft tube 600, thereby releasing the restriction of the second positioning block 820 on the limiting member 130. To facilitate the operator's sliding operation of the sliding ring 840, this embodiment provides a push sleeve assembly 900 on the mounting structure 800.

[0065] Specifically, the push sleeve assembly 900 includes a guide sleeve 910 slidably sleeved on the drive shaft tube 600, and a push sleeve 920 slidably sleeved on the front end of the guide sleeve 910. At least a portion of the push sleeve 920 is located outside the handle body 200. The guide sleeve 910 is fixedly connected to the handle body 100. The guide sleeve 910 has a guide groove 911, and the groove direction of the guide groove 911 is arranged along the axial direction of the drive shaft tube 600. A push pin 930 is slidably connected in the guide groove 911. One end of the push pin 930 is fixedly connected to the push sleeve 920, and the other end of the push pin 930 abuts against the end of the sliding ring 840 away from the second spring 860. With this configuration, at least a portion of the push assembly 920 in this embodiment is located outside the handle body 200. The operator slides the push assembly 920 through its exposed area, causing it to move towards the rear end of the drive shaft tube 600. Since the push assembly 920 is connected to the push pin 930, during the movement of the push assembly 920, the push pin 930 pushes the sliding ring 840 towards the rear end of the drive shaft tube 600, thereby releasing the second positioning block 820 from restricting the limiting member 130. At the same time, since the push pin 930 is restricted to sliding in the guide groove 911 of the guide sleeve 910, and the groove of the guide groove 911 is arranged along the axial direction of the drive shaft tube 600, the push assembly 920 can only move along the axial direction of the drive shaft tube 600 when pushed by the operator, which helps to improve the guiding performance of the push assembly 920 during movement.

[0066] Furthermore, two push pins 930 are provided, and the two push pins 930 are symmetrically arranged on opposite sides of the guide sleeve 910. Correspondingly, two guide grooves 911 are also provided. This arrangement ensures that when the push pins 930 push the sliding ring 840, the two sides of the sliding ring 840 are balanced, which helps to improve the stability of the sliding ring 840 during sliding.

[0067] Furthermore, a limiting ring 940 is provided at the rear end of the guide sleeve 910, and a third spring 950 is fitted on the guide sleeve 910. The third spring 950 is located between the push assembly 920 and the limiting ring 940. With this configuration, during the process of the push assembly 920 being pushed towards the rear end of the transmission shaft tube 600, the push assembly 920 compresses the third spring 950. After the tool body 100 and the handle body 200 are separated, the operator releases the force applied to the push assembly 920. At this time, the push assembly 920 resets under the elastic force of the third spring 950, and the second positioning block 820 also resets under the elastic force of the second spring 860.

[0068] Furthermore, the exposed area of ​​the push assembly 920 is provided with anti-slip texture 921. This design increases the friction between the operator and the push assembly 920 through the anti-slip texture 921, thereby facilitating the operator to push the push assembly 920.

[0069] The disassembly and assembly process of the tool body 100 and the handle body 200 is described in detail below with reference to the above embodiments:

[0070] When the tool body 100 is installed:

[0071] Step 1: Refer to the appendix Figure 11 The tool holder 120 of the tool body 100 is inserted into the mounting cavity 610 of the drive shaft tube 600 located inside the handle body 200. Since the inner side of the mounting cavity 610 fits against the outer side of the tool holder 120, the radial movement of the tool holder 120 is restricted. At this time, the limiting member 130 of the tool holder 120 and the preset gap 830 between the first positioning block 810 and the mounting cavity 610 are aligned with each other.

[0072] Step 2: Refer to the appendix Figure 12 As the handle portion 120 continues to be inserted, its limiting member 130 passes through the preset gap 830 until the first positioning block 810 abuts against the end of the handle portion 120; during this period, after the limiting member 130 passes through the preset gap 830, it abuts against the end of the second positioning block 820, and as the handle portion 120 continues to be inserted, the limiting member 130 drives the second positioning block 820 to move towards the rear end of the transmission shaft tube 600, during which the second positioning block 820 compresses the second spring 860;

[0073] Step 3: Refer to the appendix Figure 13-14The tool body 100 is rotated by a certain angle. On the one hand, the notch 131 of the limiting member 130 is engaged with the first positioning block 810 to restrict the axial movement of the tool holder 120. On the other hand, the limiting member 130 is rotated so that it does not abut against the end of the second positioning block 820. Since the second positioning block 820 lacks the abutment of the limiting member 130, it moves towards the front end of the transmission shaft tube 600 under the elastic force of the second spring 860, so that the side of the second positioning block 820 abuts against the limiting member 130. Since the second positioning block 820 cannot move circumferentially, the circumferential movement of the tool holder 120 is restricted. This completes the installation operation of the tool body 100.

[0074] When disassembling the tool body 100:

[0075] Step 4: Push the push assembly 920 toward the rear end of the drive shaft tube 600. The push assembly 920 pushes the sliding ring 840 toward the rear end of the drive shaft tube 600 through the push pin 930. The sliding ring 840 and the second positioning block 820 are connected to each other through the connecting pin 850. Therefore, the second positioning block 820 also moves toward the rear end of the drive shaft tube 600 at the same time. Thus, the second positioning block 820 releases the restriction on the limiting member 130, that is, the second positioning block 820 releases the restriction on the circumferential movement of the tool body 100.

[0076] Step 5: Move the tool body 100 in the circumferential direction until the limiting member 130 is aligned with the preset gap 830. At this time, the notch 131 is released from mutual engagement with the first positioning block 810, that is, the first positioning block 810 releases the restriction on the axial movement of the tool body 100.

[0077] Step 6: Move the tool holder 120 toward the front end of the drive shaft tube 600. At this time, the limiting member 130 can pass through the preset gap 830 until the tool holder 120 and the drive shaft tube 600 are separated from each other, thereby completing the disassembly operation of the tool body 100. Then the push assembly 920 is reset under the elastic force of the third spring 950, and the second positioning block 820 is also reset under the elastic force of the second spring 860.

[0078] It should be noted that the other contents of the medical plastic surgery reciprocating saw handpiece disclosed in this utility model are existing technologies and will not be described in detail here.

[0079] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any application of this utility model directly or indirectly in other related technical fields is included within the patent protection scope of this utility model.

Claims

1. A medical orthopedic reciprocating sawing handpiece characterized by, The medical orthopedic reciprocating saw machine comprises: a cutter body comprising a blade part and a shank part connected together; a handle body, a front end of the handle body being used for connecting the shank part, and a rear end of the handle body being used for connecting an external rotary driving device; a transmission structure installed inside the handle body to enable the rotary driving device to drive the cutter body to make linear reciprocating movement along its own axis through the transmission structure; Specifically, the transmission structure comprises an eccentric assembly and a transmission shaft tube; the eccentric assembly comprises a frame part and an eccentric wheel part arranged inside the frame part in a frame shape, the inside of the frame part is provided with a movable space for the eccentric wheel part to make eccentric rotary movement, and the central axis and the rotary axis of the eccentric wheel part are not in the same straight line; the eccentric wheel part can make eccentric rotary movement under the drive of the rotary driving device, and at least part of the outside of the eccentric wheel part keeps in contact with the inside of the frame part during the eccentric rotary movement of the eccentric wheel part; the transmission shaft tube is slidably connected to the inside of the handle body along its own axis, the front end of the transmission shaft tube is connected with the shank part, and the rear end of the transmission shaft tube is fixedly connected with the frame part.

2. The medical orthopedic reciprocating saw according to claim 1, wherein: The eccentric assembly further comprises an eccentric wheel shaft and two oppositely arranged first bearing seats, and the eccentric wheel part is sleeved on the eccentric wheel shaft; the two ends of the eccentric wheel shaft are rotatably connected with the handle body through the first bearing seats, respectively.

3. The medical orthopedic reciprocating saw according to claim 2, wherein: The transmission structure comprises a gear assembly, and the rotary driving device drives the eccentric wheel part to make eccentric reciprocating movement through the gear assembly; Specifically, the gear assembly comprises a first gear and a second gear, the first gear and the second gear are in meshing transmission and are arranged at right angles to each other; the first gear is connected with the driving end of the rotary driving device, and the second gear is sleeved on the eccentric wheel shaft.

4. The medical orthopedic reciprocating saw according to claim 3, wherein: The inside of the handle body is provided with a connecting structure for connecting the transmission structure and the driving end of the rotary driving device with each other; Specifically, the connecting structure comprises a connecting sleeve and a connecting shaft tube arranged coaxially, the rear end of the connecting sleeve is used for connecting with the driving end of the rotary driving device, the front end of the connecting sleeve is slidably sleeved on the rear end of the connecting shaft tube, and the connecting sleeve can make sliding movement relative to the connecting shaft tube; the front end of the connecting shaft tube is fixedly connected with the first gear; a fixed ring is fixedly sleeved on the connecting shaft tube, a first spring is sleeved on the connecting shaft tube, and the first spring is arranged between the fixed ring and the rear end of the connecting sleeve.

5. The medical orthopedic reciprocating saw machine according to claim 4, characterized in that: the connecting structure further comprises a second bearing seat, the second bearing seat is sleeved on the connecting shaft tube; and the connecting shaft tube is rotatably connected with the handle body through the second bearing seat. And, a front end of the connecting sleeve is provided with a limiting slot, a slot direction of the limiting slot is arranged along an axial direction of the connecting sleeve; a rear end of the connecting shaft sleeve is fixedly provided with a limiting pin, the limiting pin is slidingly connected in the limiting slot.

6. The medical orthopedic reciprocating saw according to claim 1, wherein: The medical orthopedic reciprocating saw handle comprises a mounting structure, the mounting structure is used for fixedly connecting the shank portion and the transmission shaft tube; Specifically, the mounting structure comprises a mounting cavity arranged at a front end of the transmission shaft tube, the mounting cavity is used for sleeving the shank portion, and an inner side surface of the mounting cavity and an outer side surface of the shank portion are mutually fitted to limit radial movement of the shank portion; Wherein, an end portion of the shank portion away from the blade portion is provided with a limiting piece, a gap portion is arranged at a connecting position of the limiting piece and the shank portion; the mounting structure further comprises a first positioning block and a second positioning block; the first positioning block is fixedly arranged at the mounting cavity, the first positioning block is used for embedding into the gap portion to limit axial movement of the shank portion; the second positioning block is slidingly connected to the mounting cavity, and the second positioning block is used for abutting against a side portion of the limiting piece to limit circumferential movement of the shank portion.

7. The medical orthopedic reciprocating saw according to claim 6, wherein: A preset gap is arranged between the first positioning block and the mounting cavity, a cross-sectional area of the preset gap is greater than a cross-sectional area of the limiting piece, and the cross-sectional area of the preset gap is less than a cross-sectional area of the shank portion.

8. The medical orthopedic reciprocating saw according to claim 6, wherein: The mounting structure further comprises a sliding ring slidingly sleeved on the transmission shaft tube, the transmission shaft tube is provided with a sliding slot, a slot direction of the sliding slot is arranged along an axial direction of the transmission shaft tube; a connecting pin is slidingly connected in the sliding slot, the sliding ring is fixedly connected with the second positioning block through the connecting pin; a second spring is arranged in the mounting cavity, and the second spring is arranged between the second positioning block and a rear end of the transmission shaft tube.

9. The medical orthopedic reciprocating saw according to claim 8, wherein: The mounting structure further comprises a pushing sleeve assembly, the pushing sleeve assembly is used for sliding operation of the sliding ring by an operator; specifically, the pushing sleeve assembly comprises a guide sleeve slidingly sleeved on the transmission shaft tube, and a pushing sleeve member slidingly sleeved on a front end of the guide sleeve, at least a part of the pushing sleeve member is located outside the handle body, and the guide sleeve is fixedly connected with the handle body; the guide sleeve is provided with a guide slot, a slot direction of the guide slot is arranged along an axial direction of the transmission shaft tube; a pushing movement pin is slidingly connected in the guide slot, one end of the pushing movement pin is fixedly connected with the pushing sleeve member, and the other end of the pushing movement pin abuts against an end portion of the sliding ring away from the second spring.

10. The medical orthopedic reciprocating saw handle according to claim 9, wherein: a rear end of the guide sleeve is provided with a limiting ring, the guide sleeve is sleeved with a third spring, and the third spring is arranged between the pushing sleeve member and the limiting ring; and, an exposed area of the pushing sleeve member is provided with an anti-skid pattern.

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