CN116115290A - Cutting assembly and surgical sagittal saw - Google Patents

Abstract

The invention relates to a cutting assembly and a surgical sagittal saw, the cutting assembly comprising a housing, a rocking lever and a linkage assembly, wherein: the swinging rod part is pivoted in the shell, and the end part of the swinging rod extending out of the shell is provided with a cutting part; the connecting rod assembly is arranged inside the shell and is provided with a head end and a tail end, the connecting rod assembly comprises one or more connecting rods which are connected in a movable mode in sequence, the connecting rod at the tail end of the connecting rod assembly is connected to the swinging rod, the connecting rod at the head end of the connecting rod assembly is connected with a vibration assembly, and the vibration assembly is used for driving the swinging motion of the connecting rod to drive the swinging rod to swing. Above-mentioned cutting assembly can set up the length of swinging arms to less, and the vibrations and the deflection of swinging arms and link assembly in the cutting process all reduce correspondingly, have improved the cutting part to the cutting precision of patient's bone face, and the swing range of swinging arms in the cutting process is less, can reduce the friction heating effect of swinging arms in the cutting process, and bone face temperature rise is low, is favorable to the recovery of wound.

Description

Cutting Components & Surgical Sagittal Saws

technical field

The invention relates to the technical field of medical instruments, in particular to a cutting assembly and a surgical sagittal saw.

Background technique

A sagittal saw is a commonly used power surgical tool in orthopedic surgery. Usually, a sagittal saw includes a hand-held part with a motor and its drive control circuit. The motor drive is connected to a vibrating head part, and the saw head is detachably connected to the vibrating head. The end away from the vibrating head has saw teeth, and the saw teeth are driven by the vibrating head to reciprocate and swing to cut close hard tissues.

When in use, the sagittal saw usually needs to cooperate with the osteotomy guide, and the precisely formed groove on the osteotomy guide can limit the moving direction of the saw head of the sagittal saw to achieve precise cutting. However, this guiding action will inevitably lead to friction between the saw head and the groove of the osteotomy guide. This friction will first cause the groove to wear, the accuracy of the groove will decrease and the cutting effect will be affected, and secondly, the metal debris produced by the friction will easily fall off. In surgical wounds, it is unfavorable for wound healing of the patient, and the vibrating plane saw head will rub against the bone surface during osteotomy to generate heat, which is also unfavorable for the patient's wound recovery.

Some existing sagittal saws are provided with a saw sheath for the saw head, so as to avoid direct contact between the saw head and the osteotomy guide. However, this kind of sagittal saw directly drives the swing of the saw blade rod through the vibrating head. In order to enable the sagittal saw to reach the cutting position, the saw blade rod is usually set to be longer, but the longer saw blade rod swings during the cutting process. If it is too large, when the saw blade bar abuts against the patient's bone surface, it will generate greater vibration and deformation, which will seriously affect the cutting accuracy of the saw blade bar on the patient's bone surface.

Contents of the invention

Based on this, it is necessary to provide a cutting assembly and a surgical sagittal saw to solve the problem that the saw blade bar of the prior sagittal saw has low cutting accuracy for the patient's bone surface.

A cutting assembly comprising:

shell;

a swing rod, partially pivotally connected to the inside of the casing, the swing rod has a cutting portion at the end protruding from the casing;

The connecting rod assembly is arranged inside the housing. The connecting rod assembly has a head end and a terminal end. The connecting rod is connected to the swing rod, and the connecting rod at the head end of the connecting rod assembly is connected with a vibration assembly, and the vibration assembly is used to drive the swing movement of the connecting rod to drive the swing rod swing.

In one of the embodiments, one of the swing rod and the end is provided with a limiting member, and the other of the two is provided with a guiding structure, and the limiting member and the guiding structure are relatively movably matched; and/or;

One of the two adjacent connecting rods is provided with the limiting member, and the other of the two connecting rods is provided with the guiding structure, and the limiting member and the guiding structure are relatively movably matched.

In one of the embodiments, the relative movement direction of the limiting member and the guiding structure is along the rod length direction of the swing rod or the connecting rod.

In one of the embodiments, the housing is provided with arc-shaped grooves;

The connecting rod at the head end of the connecting rod assembly is provided with the limiting member, and the limiting member is movably inserted in the arc-shaped groove.

In one of the embodiments, the swing lever and the casing are pivotally connected together through a first rotation pin, one of the swing lever and the casing is provided with the first rotation pin, and the other of the two is provided with the first rotation pin. One is provided with a first rotation hole corresponding to the first rotation pin.

In one of the embodiments, the connecting rod assembly includes a first connecting rod located at the head end thereof and one or more second connecting rods that are movably connected with the first connecting rod in turn and relatively movably connected in sequence, so The second connecting rod and the housing are pivotally connected together through a second rotating pin, one of the second connecting rod and the housing is provided with a second rotating pin, and the other of the two is provided with the second rotating pin. The second rotation hole corresponding to the second rotation pin.

In one of the embodiments, the connecting rod assembly includes a plurality of connecting rods, the plurality of connecting rods are arranged in sequence along the length direction of the rods, and two adjacent connecting rods are movable.

In one embodiment, the first end of the connecting rod assembly is provided with a first notch, the first notch communicates with the exterior of the casing, and the first notch is used for connecting the vibrating assembly.

In one of the embodiments, the end of the housing is provided with a second notch corresponding to the first notch, and the head end of the connecting rod assembly is provided with a second notch communicating with the first notch. A through hole, the end of the shell is provided with a second through hole communicating with the second notch groove, the first through hole is coaxial with the second through hole, and is used to pass through the saw blade to press the tight components.

In one of the embodiments, at least one positioning hole is opened on the housing, and the positioning hole is used for positioning insertion of the saw blade pressing assembly.

A surgical sagittal saw, including a vibrating head, a driving assembly, a vibrating assembly, a saw blade pressing assembly, and a cutting assembly as described in any one of the above technical solutions, the driving assembly and the vibrating assembly are installed on the On the vibrating head, the driving assembly is used to drive the movement of the vibrating assembly, the vibrating assembly is connected to the head end of the connecting rod assembly, and the saw blade pressing assembly is used to fix the cutting assembly on The vibration head.

In one of the embodiments, a limiting structure is provided on the vibrating head, and the limiting structure fixes the peripheral position of the pressure plate and the vibrating head.

In the above-mentioned cutting assembly and surgical sagittal saw, when the vibrating assembly drives the connecting rod to swing, the connecting rod can drive the swinging rod to swing, so that the cutting part at the end of the swinging rod acts on the cutting position and completes the osteotomy of the patient. The swinging rod is pivotally connected to the inside of the shell to prevent the metal debris generated by the friction between the swinging rod and the osteotomy guide plate from entering into the patient's body during the swinging process, which is helpful for the recovery of the cut site of the patient. Due to the design of the connecting rod, the length of the swinging rod can be set to be small, and the vibration and deformation of the swinging rod and the connecting rod assembly during the cutting process are correspondingly reduced, which improves the cutting accuracy of the cutting part on the patient's bone surface, and The swing range of the swing rod during the cutting process is small, and the contact area between the swing rod and the shell is reduced, which can reduce the frictional heat generation effect of the swing rod during the cutting process, and the temperature rise of the bone surface is low, which is beneficial to the recovery of the wound. In addition, the connection between the cutting component and the vibrating component can be realized by directly connecting the connecting rod component to the vibrating component, and the installation is convenient.

Description of drawings

Fig. 1 is a schematic view of the structure of the surgical sagittal saw after assembly in one embodiment;

Fig. 2 is a structural schematic diagram of the surgical sagittal saw before assembly in an embodiment;

Fig. 3 is the sectional view of surgical sagittal saw in one embodiment;

Fig. 4 is A-A direction sectional view in Fig. 3;

Fig. 5 is an exploded schematic diagram of a cutting assembly in an embodiment;

Fig. 6 is a schematic structural view of a cutting assembly in an embodiment;

Fig. 7 is a schematic structural view of a cutting assembly in another embodiment;

Fig. 8 is a schematic structural view of a cutting assembly in another embodiment;

Fig. 9 is a schematic diagram of cooperation between the saw blade pressing assembly and the cutting assembly in the surgical sagittal saw in one embodiment;

Fig. 10 is a schematic diagram of cooperation between the vibrating pin and the vibrating shaft in one embodiment;

Fig. 11 is an exploded schematic diagram of a surgical sagittal saw in one embodiment;

Fig. 12 is a schematic diagram of the coordination of the lifting assembly when the cutting assembly is installed in one embodiment;

Fig. 13 is a schematic diagram of cooperation of the lifting assembly when the cutting assembly is disassembled in an embodiment;

Fig. 14 is a schematic diagram of cooperation between the vibrating head and the cutting assembly in the surgical sagittal saw in one embodiment;

Fig. 15 is an exploded schematic diagram of a surgical sagittal saw in one embodiment.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

The drive assembly of the present invention can follow the drive assembly in the prior art. The drive assembly in the prior art includes an eccentric shaft, a spherical bearing and a shift fork, and the drive assembly is configured with a drive motor. The input end of the eccentric shaft can be connected to the output shaft of the driving motor, the spherical bearing is sleeved on the output end of the eccentric shaft, the shift fork is sleeved on the outer wall of the spherical bearing, and the shift fork is fixedly connected to the vibration shaft. When the eccentric shaft performs circular motion driven by the drive motor, the spherical bearing performs eccentric circular motion on the output end of the eccentric shaft. Since the shift fork is sleeved on the spherical bearing, the shift fork will also be driven to perform reciprocating swinging motion, and Drive the vibrating shaft to rotate.

In the prior art, the driving connection between the cutting assembly and the vibrating shaft refers to aligning and socketing the cutting assembly on the eccentric output end of the vibrating shaft. This requires that the saw blade pressing assembly should be removed first to expose the output end of the vibrating shaft during installation, then the cutting assembly should be aligned and sleeved on the output end of the vibrating shaft, and finally the saw blade pressing assembly should be installed on the vibrating shaft Secure the cutting assembly. Due to the small size of the cutting assembly and the output end of the vibrating shaft, the process of aligning and installing the cutting assembly is cumbersome, which affects work efficiency. And the cutting assembly is directly driven by the vibrating shaft to reciprocate and deflect. The cutting assembly needs to be set longer, but the longer cutting assembly swings too much during the cutting process, and when the cutting assembly touches the patient's bone surface, it will produce Larger vibration and deformation seriously affect the cutting accuracy of the cutting assembly on the patient's bone surface. In addition, during the cutting process, the cutting assembly sweeps a relatively large area of the casing, and generates more heat due to friction with the casing, which is not conducive to wound recovery of the patient.

For this, the present invention provides a new cutting assembly 100, referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, Fig. 1 shows the assembled surgical sagittal saw 200 in one embodiment of the present invention Schematic diagram of the structure, FIG. 2 is a schematic structural diagram of the surgical sagittal saw 200 before assembly, FIG. 3 is a cross-sectional view of the surgical sagittal saw 200 , and FIG. 4 is a partial cross-sectional view of the surgical sagittal saw 200 . The surgical sagittal saw 200 includes a cutting assembly 100 , a body 210 , a vibrating head 220 , a driving assembly 230 , a vibrating assembly 240 and a blade pressing assembly 250 . The main body 210 is for users to hold and operate. The vibrating head 220 is installed on the main body 210. Both the driving assembly 230 and the vibrating assembly 240 are installed on the vibrating head 220. The driving assembly 230 is used to drive the movement of the vibrating assembly 240. The vibrating assembly 240 is connected to the At the head end 131 of the connecting rod assembly 130 , the saw blade pressing assembly 250 is used to fix the cutting assembly 100 on the vibrating head 220 .

As shown in FIG. 5 , the present invention provides a cutting assembly 100 , and the cutting assembly 100 includes a housing 110 , a swing rod 120 and a connecting rod assembly 130 . In this embodiment, the shell 110 is obtained by splicing two opposite shells up and down, and can be set as a common Huff type, for example, a wall connecting the two shells is formed around the two shells, and in the middle of the shell 110 An installation space for the swing rod 120 and the connecting rod assembly 130 is formed, and the housing 110 can limit the movement of the swing rod 120 and the connecting rod assembly 130 in the installation space, which can improve the reliability of the cutting assembly 100 of the present invention during operation.

The swing rod 120 is partially pivoted inside the housing 110 so that the swing rod 120 can swing on the housing 110 . The swing rod 120 has a cutting portion 121 at the end protruding from the housing 110 . In this embodiment, the cutting part 121 is a sawtooth structure disposed at the end of the swing rod 120, so that the cutting part 121 can act on the cutting position and complete the osteotomy of the patient during the swinging process of the swing rod 120.

As shown in FIGS. 6-8 , the link assembly 130 is disposed inside the housing 110 , and the link assembly 130 has a head end 131 and a end 132 . The connecting rod assembly 130 includes one or more connecting rods 133 which are sequentially and relatively movably connected. In one embodiment, as shown in FIG. 6 , the connecting rod assembly 130 only includes one connecting rod 133 , at this time, the head end 131 and the terminal end 132 of the connecting rod assembly 130 are two ends of the connecting rod 133 . In another embodiment, the connecting rod assembly 130 includes a plurality of connecting rods 133 that are relatively movably connected in sequence. A plurality of connecting rods 133 are arranged sequentially in the rod length direction, and two adjacent connecting rods 133 are movable. For example, there may be two connecting rods 133. As shown in FIG. The end 131 is the end of the first link 133a away from the second link 133b, and the end 132 of the link assembly 130 is the end of the second link 133b away from the first link 133a. As another example, there can be three connecting rods 133, as shown in Figure 8, if the three connecting rods 133 are defined as a first connecting rod 133a and two second connecting rods 133b, one end of the two second connecting rods 133b The parts are connected with each other, and the other end of one second connecting rod 133b is connected with the first connecting rod 133a. At this time, one first connecting rod 133a and two second connecting rods 133b have two suspended , wherein the suspended end of the first connecting rod 133a is the head end 131 of the connecting rod assembly 130 , and the suspended end of the second connecting rod 133b is the end 132 of the connecting rod assembly 130 . Of course, in other feasible embodiments, the number of connecting rods 133 included in the connecting rod assembly 130 can be specifically set according to requirements. The connecting rod 133 at the end 132 of the connecting rod assembly 130 is connected to the swing rod 120, the connecting rod 133 at the head end 131 of the connecting rod assembly 130 is connected with a vibrating assembly 240, and the vibrating assembly 240 is used to drive the swinging motion of the connecting rod 133 to Drive the swing bar 120 to swing. Wherein, the swing of the swing rod 120 is driven by one or more connecting rods 133, so that the moment borne by the swing rod 120 and the single connecting rod 133 can be reduced under the condition that the total length of the swing rod 120 and the connecting rod assembly 130 remains unchanged. , the amount of vibration and deformation of the swing rod 120 and the connecting rod assembly 130 during the cutting process is correspondingly reduced, thereby improving the cutting accuracy of the cutting part 121 on the patient's bone surface, and the swing range of the swing rod 120 during the cutting process is small, and the swing The contact area between the rod 120 and the shell 110 is reduced, which can reduce the frictional heat generation effect of the swing rod 120 in the cutting process, and the temperature rise of the bone surface is low, which is beneficial to the recovery of the wound; or the swing rod 120 and the connecting rod assembly 130 In the case of the same load, a cutting assembly 100 with a longer overall length is designed to meet different surgical requirements.

In the above-mentioned cutting assembly 100, the swing rod 120 is pivotally connected to the inside of the housing 110, and the housing 110 can prevent the direct contact between the swing rod 120 and the osteotomy guide plate, and avoid friction between the swing rod 120 and the osteotomy guide plate during the swing process. The metal debris enters into the patient's body, which helps the recovery of the patient's cut part 121 . The length of the swing rod 120 can be set to be small, and the swing range of the swing rod 120 can be reduced. On the one hand, the frictional heat generation effect of the swing rod 120 in the cutting process can be reduced, and the temperature rise of the bone surface is low, which is beneficial to the recovery of the wound; The operator's field of vision can be broadened.

In one embodiment, as shown in FIG. 5 and FIG. 8 , one of the swing rod 120 and the end 132 is provided with a stopper 140 , and the other of the swing rod 120 and the end 132 is provided with a guide structure 150 , in other words, the swing rod 120 A limiting member 140 is provided on one of the connecting rod assembly 130, and a guiding structure 150 is provided on the other of the swing rod 120 and the connecting rod assembly 130, and the limiting member 140 or the guiding structure 150 is located on the connecting rod assembly 130. When it is up, the limiting member 140 and the guiding structure 150 are located at the end 132 of the connecting rod assembly 130 . The stopper 140 and the guide structure 150 are relatively movably matched, and when the vibrating assembly 240 moves to drive the link assembly 130 to swing, the stopper 140 on the link assembly 130 moves relatively to the guide structure 150 on the swing rod 120 , or the guide structure 150 on the connecting rod assembly 130 moves relative to the stopper 140 on the swing rod 120, and the relative movement direction of the stopper 140 and the guide structure 150 is along the rod length direction of the swing rod 120 or the link 133, The connecting rod assembly 130 drives the swinging rod 120 to perform swinging motion, and during the swinging process of the swinging rod 120 , the cutting part 121 performs osteotomy on the patient. Of course, in other feasible embodiments, the cooperation between the limiting member 140 and the guiding structure 150 may also be replaced by a flexible member. Specifically, one end of the flexible member can be connected to the end 132 of the link assembly 130, and the other end of the flexible member can be connected to the swing rod 120. The rod assembly 130 drives the swing rod 120 to swing through the flexible member. Wherein, the flexible member can be a spring, an organ cover, etc. that can deform under the action of an external force. On the one hand, the flexible member can transmit the swing force of the connecting rod assembly 130 to the swing rod 120 to drive the movement of the swing rod 120; On the one hand, the flexible member has a certain amount of deformation in the process of stress, which can provide a certain space for giving way, and prevent the bad phenomenon of locking between the connecting rod assembly 130 and the swing rod 120 during the relative movement.

Further, as shown in Fig. 7 and Fig. 8, if the connecting rod assembly 130 includes a plurality of connecting rods 133 that are relatively movably connected in sequence, one of the two adjacent connecting rods 133 is provided with a limiter 140, and the two adjacent connecting rods The other one of 133 is provided with a guide structure 150, and the position-limiting member 140 cooperates with the guide structure 150 so that it can move relatively. Since the vibrating assembly 240 is connected to the connecting rod 133 at the head end 131 of the connecting rod assembly 130, when the vibrating assembly 240 drives the connecting rod 133 at the head end 131 to perform swinging motion, the relative movement between the limiting member 140 and the guiding structure 150 , and the relative movement direction of the limiting member 140 and the guide structure 150 is along the length direction of the swinging rod 120 or the connecting rod 133, so that the swinging motion of the connecting rod 133 at the head end 131 can be transmitted to the subsequent connecting rod 133 in sequence while avoiding clinging. dead, so that the connecting rod assembly 130 as a whole performs a swinging movement, so as to drive the swinging rod 120 to perform a swinging movement.

Wherein, the guiding structure 150 is a groove or a through hole. As in this embodiment, the limiting member 140 is a motion pin, and the guide structure 150 is a waist-shaped hole opened on the connecting rod assembly 130 or the swing rod 120. Since the waist-shaped hole has a certain space for space, the position-limiting The member 140 can move in the guide structure 150, or the guide structure 150 can move on the limit member 140, and can prevent the relative movement between the link assembly 130 and the swing rod 120, or the inner link 133 of the link assembly 130. The relative movement between them has the undesirable phenomenon of locking. In other embodiments, the guide structure 150 can be a waist-shaped groove, a square hole, etc., as long as the limiter 140 can move in the guide structure 150, or the guide structure 150 can move on the limiter 140. .

In order to enable the vibrating assembly 240 to drive the swinging motion of the connecting rod assembly 130 , in a preferred embodiment, as shown in FIGS. 5 and 8 , the housing 110 is provided with an arc-shaped slot 111 . The connecting rod 133 at the head end 131 of the connecting rod assembly 130 is provided with a limiting member 140 , and the limiting member 140 is movably inserted into the arc-shaped groove 111 . When the vibrating assembly 240 moves, the stopper 140 on the connecting rod 133 at the head end 131 of the connecting rod assembly 130 moves in the arc groove 111, so that the vibrating assembly 240 can drive the swinging motion of the connecting rod assembly 130, and the arc-shaped The slot 111 can define a swing path of the link 133 at the head end 131 of the link assembly 130 .

In order to reduce the vibration amplitude of the swing rod 120 during the cutting process, in a preferred implementation manner, as shown in FIG. One of the swing rod 120 and the housing 110 is provided with a first rotation pin 160 , and the other of the swing rod 120 and the housing 110 is provided with a first rotation hole 170 , and the first rotation hole 170 corresponds to the first rotation pin 160 . In other words, if the first rotation pin 160 is arranged on the swing rod 120, the first rotation hole 170 is opened on the casing 110; superior. During the swinging process of the swinging rod 120, the swinging rod 120 can swing with the first rotating pin 160 as the rotation center, which can reduce the vibration amplitude of the swinging rod 120 on the shell 110 and improve the cutting accuracy of the cutting part 121 on the patient's bone surface , and reduce the contact area between the swing rod 120 and the shell 110 during the swing process, reduce the frictional heat generation effect of the swing rod 120 during the cutting process, and reduce the temperature rise of the bone surface, which is beneficial to the recovery of the wound. Preferably, the first rotating pin 160 or the first rotating hole 170 is arranged at the middle position of the swinging rod 120, which can reduce the size of the rotating arm of the swinging rod 120, thereby minimizing the vibration amplitude of the swinging rod 120 on the casing 110 .

Further, as shown in FIG. 8, the connecting rod assembly 130 includes a first connecting rod 133a located at its head end 131, or includes a first connecting rod 133a located at its head end 131 and is movably connected with the first connecting rod 133a. One or more second connecting rods 133b that are relatively movably connected in sequence, in other words, if the connecting rod assembly 130 only includes one connecting rod 133, then the connecting rod 133 is the first connecting rod 133a, Including a plurality of connecting rods 133, the connecting rod 133 formed with the head end 131 of the connecting rod assembly 130 is the first connecting rod 133a, and the other connecting rods 133 are the second connecting rods 133b. The second connecting rod 133b and the housing 110 are pivotally connected together by a second rotating pin 180, one of the second connecting rod 133b and the housing 110 is provided with a second rotating pin 180, and the other of the second connecting rod 133b and the housing 110 A second rotation hole 190 is provided, and the second rotation hole 190 corresponds to the second rotation pin 180 . In other words, if the second rotating pin 180 is located on the second connecting rod 133b, the second rotating hole 190 is located on the housing 110; if the second rotating pin 180 is located on the housing 110, the second rotating hole 190 is located on the second connecting rod 133b superior. During the swinging process of the connecting rod assembly 130, the second connecting rod 133b can swing with the second rotating pin 180 as the center of rotation, which can reduce the vibration amplitude of the connecting rod assembly 130 on the housing 110, thereby reducing the vibration of the connecting rod assembly 130. During the swinging process, the contact area with the outer shell 110 reduces the frictional heat generation effect of the connecting rod assembly 130 during the swinging process, and the temperature rise of the bone surface is low, which is beneficial to the recovery of the wound. Preferably, the second rotating pin 180 or the second rotating hole 190 is arranged at the middle position of the second connecting rod 133b, which can reduce the size of the rotating arm of the second connecting rod 133b, thereby minimizing the size of the connecting rod assembly 130 in the shell. 110 on the vibration amplitude.

Wherein, it should be noted that, in this embodiment, as shown in FIGS. When the rod 133 swings, according to the principle of force, in order to prevent the locking phenomenon between the connecting rods 133, the swing direction between the adjacent two connecting rods 133 is opposite, and the connecting rod 133 at the end 132 of the connecting rod assembly 130 The swinging direction of the swinging rod 120 is also opposite to that of the swinging rod 120. Since the length and mass of each connecting rod 133 and the swinging rod 120 are relatively close to each other, the direction of the inertial force produced by each connecting rod 133 and the swinging rod 120 during the swinging process is opposite. In this way, the inertial forces generated by the connecting rods 133 and the swinging rod 120 can be partially or completely offset, which can significantly reduce the vibration of the connecting rod assembly 130 and the swinging rod 120 during the swinging process.

In order to facilitate the assembly of the cutting assembly 100, a preferred embodiment, as shown in FIG. The notch 134 is used for connecting the vibration component 240 . Wherein, the first notch 134 is preferably integrally formed with the connecting rod assembly 130 through injection molding, molding, etc., so as to simplify the forming process of the connecting rod assembly 130 and save the manufacturing cost of the connecting rod assembly 130 .

Compared with the traditional installation method of the cutting assembly 100, the process of aligning and installing the cutting assembly is more cumbersome, which affects the working efficiency. In this embodiment, by opening the first notch groove 134 at the head end 131 of the connecting rod assembly 130, it is no longer necessary to connect the cutting assembly 100 to the output end of the vibrating shaft 241 by aligning and socketing, and only need to align the direction with the output end of the vibration shaft 241. The cutting part 121 protrudes in the opposite direction to push the cutting assembly 100, and the cutting assembly 100 is plugged into the first notch 134 to complete the connection between the cutting assembly 100 and the vibrating assembly 240, and the installation of the cutting assembly 100 is convenient , the installation efficiency of the cutting assembly 100 can be improved.

In one embodiment, as shown in FIG. 5 , a second notch 112 corresponding to the first notch 134 is provided at the end of the housing 110 , and the projection of the second notch 112 on the first notch 134 covers the first notch 134 . Notch groove 134 . In other words, the size of the second notch 112 should be larger than that of the first notch 134 . In this way, when the cutting assembly 100 is pushed toward the output end of the vibrating shaft 241 , the output end of the vibrating shaft 241 first enters the second notch 112 of the housing 110 , and then enters the first notch 134 of the connecting rod assembly 130 . The output end of the vibrating shaft 241 is not constrained by the second notch 112 when reciprocating, and can freely push the two side walls of the first notch 134 to make the connecting rod assembly 130 swing.

In one embodiment, as shown in FIG. 2 and FIG. 5 , the head end 131 of the connection component defines a first through hole 135 communicating with the first notch groove 134 . The end of the housing 110 defines a second through hole 113 communicating with the second notch 112 . The first through hole 135 is coaxial with the second through hole 113 and is used for passing the saw blade pressing assembly 250 .

The above-mentioned cutting assembly 100 is provided with a first through hole 135 which is evacuated at the head end 131 of the connecting rod assembly 130, and a second through hole 113 which is evacuated is set on the housing 110, the first through hole 135, the second through hole 113 can be used to set the saw blade pressing assembly 250. On the one hand, the structure of the vibrating head 220 can be made compact; The shell 110 ensures the stability of the cooperation between the cutting assembly 100 and the vibrating assembly 240 , and improves the fixing effect of the saw blade pressing assembly 250 on the cutting assembly 100 .

Further, as shown in FIG. 5 , at least one positioning hole 114 is opened on the housing 110 , and the positioning hole 114 is used for the positioning insertion of the saw blade pressing assembly 250 . Wherein, as shown in FIG. 9 , a positioning pin 254 matched with the positioning hole 114 is provided on the saw blade pressing assembly 250 , and when the saw blade pressing assembly 250 fixes the cutting assembly 100 , the saw blade can be pressed tightly. The positioning pin 254 of the component 250 is plugged into the positioning hole 114, so that the position between the saw blade pressing component 250 and the cutting component 100 can be pre-positioned and matched, and the positioning and alignment between the two can be completed at one time, which is convenient The fixing operation of the cutting assembly 100 follows.

In addition, as shown in Figure 1, Figure 3 and Figure 4, the present invention also provides a surgical sagittal saw 200, the surgical sagittal saw 200 includes a body 210, a vibration head 220, a drive assembly 230, a vibration assembly 240, a saw blade The pressing assembly 250 and the cutting assembly 100 according to any one of the above technical solutions. Wherein, the body 210 can be held by the user, the vibration head 220 is installed on the body 210 , the driving assembly 230 and the vibration assembly 240 are installed on the vibration head 220 , and the driving assembly 230 is used to drive the movement of the vibration assembly 240 . Specifically, as shown in FIGS. 3 and 4 , the driving assembly 230 includes an eccentric shaft 231 , a spherical bearing 232 and a shift fork 233 , and the driving assembly 230 is configured with a driving motor 211 . The input end of the eccentric shaft 231 can be connected to the output shaft of the driving motor 211, the spherical bearing 232 is sleeved on the output end of the eccentric shaft 231, the shift fork 233 is sleeved on the outer wall of the spherical bearing 232, and the shift fork 233 is fixedly connected on the vibrating shaft 241. When the eccentric shaft 231 performs circular motion driven by the drive motor 211, the spherical bearing 232 performs eccentric circular motion on the output end of the eccentric shaft 231. Since the shift fork 233 is sleeved on the spherical bearing 232, the shift fork 233 will also be moved Drive to do reciprocating swinging motion, and drive the vibrating shaft 241 to do rotating motion. The vibrating assembly 240 is connected to the head end 131 of the connecting rod assembly 130 , and the saw blade pressing assembly 250 is used to fix the cutting assembly 100 on the vibrating head 220 .

In the above-mentioned surgical sagittal saw 200, when the vibrating assembly 240 drives the swing movement of the connecting rod 133, the connecting rod 133 can drive the swinging movement of the swinging rod 120, so that the cutting part 121 at the end of the swinging rod 120 acts on the cutting position and completes the operation for the patient. Osteotomy work. The cutting assembly 100 has high cutting precision, and the swinging range of the swing rod 120 is small during the cutting process, which can reduce the frictional heat generation effect of the swing rod 120 during the cutting process, lower the temperature rise of the bone surface, and facilitate the recovery of the wound. In addition, the installation between the cutting assembly 100 and the vibration head 220 is convenient, which can improve the installation efficiency of the cutting assembly 100 .

In one embodiment, as shown in FIG. 5 , FIG. 6 , FIG. 10 and FIG. 11 , the head end 131 of the connecting rod assembly 130 is provided with a first notch 134 and a first through hole 135 , and the first notch 134 and the second A through hole 135 communicates with them. The vibrating assembly 240 includes a vibrating shaft 241 and a vibrating pin 242 , and the vibrating pin 242 is eccentrically disposed on the vibrating shaft 241 . Specifically, the vibrating shaft 241 is provided with a mounting hole at a position deviated from its axis, and the vibrating pin 242 can be connected in the mounting hole by screwing, so that the vibrating pin 242 is eccentrically arranged on the vibrating shaft 241; The vibration pin 242 is plugged into the mounting hole by means of the vibration pin 242 to be eccentrically arranged on the vibration shaft 241; in addition, the vibration pin 242 and the vibration shaft 241 can also be integrally formed by injection molding, molding, etc. The vibration pin 242 is arranged eccentrically on the shaft 241 . The vibrating pin 242 is inserted into the first notch 134 , and the center of the vibrating shaft 241 defines a third through hole 243 .

In the above-mentioned surgical sagittal saw 200, the vibrating pin 242 is inserted into the first notch groove 134. Since the vibrating pin 242 is eccentrically arranged on the vibrating shaft 241, when the vibrating shaft 241 moves, the vibrating pin 242 swings back and forth, and the vibrating pin 242 applies The force acts on the groove wall of the first notch groove 134, and drives the connecting rod assembly 130 to perform swinging motion, and the swinging rod 120 is driven by the connecting rod assembly 130, so that the cutting part 121 at the end of the swinging rod 120 acts on the cutting position and Complete the osteotomy of the patient.

In order to install the cutting assembly 100 , in a preferred embodiment, as shown in FIGS. 3 and 9 , the saw blade pressing assembly 250 includes a pressing plate 251 and a connecting shaft 252 . The pressing plate 251 has a central pin 253 inserted on the connecting shaft 252 , and the central pin 253 passes through the first through hole 135 . When the center pin 253 is passed through the first through hole 135 , the cutting assembly 100 can be fixed on the vibrating head 220 to complete the installation and fixation of the cutting assembly 100 , and the installation of the cutting assembly 100 is simple. And when the vibrating pin 242 drives the connecting rod assembly 130 to swing, the connecting rod 133 can swing around the center pin 253 near the head end 131 of the connecting rod assembly 130 . Wherein, the connecting shaft 252 passes through the third through hole 243 , so that the connecting shaft 252 is disposed in the vibration head 220 .

In order to install and disassemble the cutting assembly 100, a preferred embodiment, as shown in FIG. The pressing plate 251 moves toward or away from the vibration head 220 . When the lifting assembly 260 drives the pressing plate 251 to move in a direction close to the vibrating head 220, the pressing plate 251 can press the cutting assembly 100 and fix the cutting assembly 100 on the vibrating head 220 to perform installation work on the cutting assembly 100; on the contrary, When the lifting assembly 260 drives the pressure plate 251 to move away from the vibration head 220, there is a gap between the pressure plate 251 and the vibration head 220, and the cutting assembly 100 is pulled out from the gap between the pressure plate 251 and the vibration head 220. The cutting assembly 100 is disassembled.

Specifically, as shown in FIG. 3 and FIG. 11 , the lifting assembly 260 includes a rotary switch 261 , a thimble 262 , a spring 263 and a fixed shaft 264 . The rotary switch 261 is rotatably disposed at the end of the vibration head 220 away from the saw blade pressing assembly 250 . The rotary switch 261 defines an accommodating groove 265 , and the rotary switch 261 has a protrusion 266 thereon. One end of the thimble 262 has a bottom plate 267, and the thimble 262 and the bottom plate 267 are both movably arranged in the accommodating groove 265, and the thimble 262, the bottom plate 26 and the accommodating groove 265 can be relatively movably assembled together in the axial direction of the fixed shaft 264, And the end of the thimble 262 away from the bottom plate 267 extends out of the receiving groove 265 , and the end of the thimble 262 extending out of the receiving groove 265 is connected to the connecting shaft 252 . The spring 263 is sleeved on the thimble 262 , one end of the spring 263 abuts against the wall of the accommodating groove 265 , and the other end of the spring 263 abuts against the bottom plate 267 . The fixed shaft 264 is fixed on the vibration head 220 by sheathing. The fixed shaft 264 is provided with a slope-shaped track 268 on the side close to the rotary switch 261. The slope-shaped track 268 has a slope in the circumferential direction around the axis of the fixed shaft 264. , the boss 266 can move in the slope track 268 . Moreover, a slot 269 is provided on the slope track 268 , and when the protrusion 266 moves in the slope track 268 , there is a position where the protrusion 266 is engaged in the slot 269 .

The above-mentioned surgical sagittal saw 200, as shown in Fig. 3 and Fig. 11, when the cutting assembly 100 needs to be pressed and fastened, the rotary switch 261 can be turned in a certain direction, and the protrusion 266 on the rotary switch 261 is Movement in the slope track 268, since the fixed shaft 264 cannot move on the vibrating head 220, the rotary switch 261 can move toward the direction away from the vibrating head 220 (downward in FIG. The groove wall abuts against one end of the spring 263 and compresses the spring 263. Under the elastic action of the spring 263, the other end of the spring 263 can exert an elastic force on the bottom plate 267, so that the thimble 262 faces away from the vibration head 220. Movement, the thimble 262 pulls the connecting shaft 252 to move away from the vibration head 220, since the connecting shaft 252 is connected to the pressure plate 251 through the center pin 253, the connection shaft 252 can drive the pressure plate 251 to move towards the direction close to the vibration head 220, so that the pressure plate 251 Press down and exert force on the cutting assembly 100 to fix the cutting assembly 100 on the vibrating head 220 . In this embodiment, in order to improve the fixing reliability of the pressing plate 251 to the cutting assembly 100, as shown in FIG. The boss 266 acts as a limiter to prevent the boss 266 from continuing to slide on the slope track 268. In this state, the spring 263 is pressed and compressed to store energy in the spring 263, and the thimble 262 is always pulled by the elastic force of the spring 263. The connecting shaft 252 improves the pressing reliability of the pressing plate 251 to the cutting assembly 100 . Conversely, as shown in Figure 13, when the cutting assembly 100 needs to be disassembled, the rotary switch 261 can be turned in the opposite direction to the above, and the protrusion 266 on the rotary switch 261 is separated from the locking groove 269, And carry out the reset movement in the slope track 268. At this time, the rotary switch 261 drives the thimble 262 to move towards the direction close to the vibrating head 220, and the thimble 262 pushes the connecting shaft 252 to move towards the direction close to the vibrating head 220. Since the connecting shaft 252 passes through The center pin 253 is connected to the pressure plate 251, and the connecting shaft 252 can drive the pressure plate 251 to move away from the vibration head 220, so that the pressure plate 251 is lifted and forms a gap with the vibration head 220, and the cutting assembly 100 is separated from the pressure plate 251 and the vibration head 220. 220, the cutting assembly 100 can be disassembled.

In order to facilitate the installation of the cutting assembly 100, a preferred embodiment, as shown in Figure 9 and Figure 14, is provided with a limiting structure 270 on the vibrating head 220, and the limiting structure 270 fixes the circumferential position of the pressure plate 251 and the vibrating head 220 . The limit structure 270 can be a limit groove. When the cutting assembly 100 is installed, the cutting assembly 100 is directly inserted into the limit groove, and the position of the cutting assembly 100 is limited by the groove wall of the limit groove. After the installation of the cutting assembly 100 is completed, the installation process of the cutting assembly 100 is simple and convenient. In some other feasible embodiments, the limiting structure 270 can also be a limiting pin provided on the vibrating head 220. When the cutting assembly 100 needs to be installed, the cutting assembly 100 can be abutted against the limiting pin. The position of the cutting assembly 100 is limited, and the installation of the cutting assembly 100 is completed.

In one embodiment, as shown in FIG. 15 , the surgical sagittal saw 200 further includes a control switch 212 and a control module 213, the control switch 212 and the control module 213 are connected in communication, and the control switch 212 and the control module 213 are both arranged on the body 210 superior. The operation of the control module 213 is controlled by the control switch 212 , and the operation or stop of the cutting assembly 100 is controlled by the control module 213 . Wherein, the control switch 212 can be a push-type switch, and the control switch 212 can also be a pneumatic valve. The present invention does not limit the specific type of the control switch 212, and can be specifically set according to requirements.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (12)

1. A cutting assembly, characterized in that, comprising: shell; a swing rod, partially pivotally connected to the inside of the casing, the swing rod has a cutting portion at the end protruding from the casing; The connecting rod assembly is arranged inside the housing. The connecting rod assembly has a head end and a terminal end. The connecting rod is connected to the swing rod, and the connecting rod at the head end of the connecting rod assembly is connected with a vibration assembly, and the vibration assembly is used to drive the swing movement of the connecting rod to drive the swing rod swing. 2. The cutting assembly according to claim 1, characterized in that, one of the swing rod and the end is provided with a limiting member, the other of the two is provided with a guiding structure, and the limiting member and the end The above-mentioned guiding structure can be matched relatively movable; and/or; One of the two adjacent connecting rods is provided with the limiting member, and the other of the two connecting rods is provided with the guiding structure, and the limiting member and the guiding structure are relatively movably matched. 3 . The cutting assembly according to claim 2 , wherein the relative movement direction of the limiting member and the guiding structure is along the rod length direction of the swing rod or the connecting rod. 4 . 4. The cutting assembly according to claim 2, wherein the housing is provided with an arc-shaped groove; The connecting rod at the head end of the connecting rod assembly is provided with the limiting member, and the limiting member is movably inserted in the arc-shaped groove. 5. The cutting assembly according to claim 1, wherein the swing rod and the housing are pivotally connected together through a first rotating pin, and one of the swing rod and the housing is provided with the first A rotating pin, the other of the two is provided with a first rotating hole corresponding to the first rotating pin. 6. The cutting assembly according to claim 5, wherein the connecting rod assembly comprises a first connecting rod at its head end and one or more connecting rods which are movably connected with the first connecting rod A second connecting rod that is movably connected, the second connecting rod and the housing are pivotally connected together through a second rotating pin, one of the second connecting rod and the housing is provided with a second rotating pin, and both The other one is provided with a second rotation hole corresponding to the second rotation pin. 7. The cutting assembly according to claim 6, characterized in that, the connecting rod assembly comprises a plurality of connecting rods, the plurality of connecting rods are arranged in sequence along the rod length direction, and two adjacent connecting rods Movable between the connecting rods. 8. The cutting assembly according to claim 1, wherein the first end of the connecting rod assembly is provided with a first notch groove, the first notch groove communicates with the outside of the housing, and the first notch The slot is used to connect the vibrating assembly. 9. The cutting assembly according to claim 8, wherein a second notch slot corresponding to the first notch slot is opened at the end of the housing, and a second notch slot corresponding to the first notch slot is opened at the head end of the connecting rod assembly. A first through hole communicating with the first notch groove, the end of the housing is provided with a second through hole communicating with the second notch groove, the first through hole is coaxial with the second through hole , and used to thread the saw blade pressing assembly. 10 . The cutting assembly according to claim 9 , wherein at least one positioning hole is opened on the housing, and the positioning hole is used for positioning insertion of the saw blade pressing assembly. 11 . 11. A surgical sagittal saw, characterized in that it comprises a vibrating head, a driving assembly, a vibrating assembly, a saw blade pressing assembly, and the cutting assembly according to any one of claims 1-10, the driving assembly and the The vibrating components are all installed on the vibrating head, the driving component is used to drive the movement of the vibrating component, the vibrating component is connected to the head end of the connecting rod component, and the saw blade pressing component is used for and fixing the cutting assembly on the vibrating head. 12 . The surgical sagittal saw according to claim 11 , wherein a limiting structure is provided on the vibrating head, and the limiting structure fixes the peripheral position of the pressure plate and the vibrating head. 13 .

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