CN112842433A

CN112842433A - Head swinging mechanism and medical anastomat

Info

Publication number: CN112842433A
Application number: CN201911195242.XA
Authority: CN
Inventors: 陈志�
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Touchstone International Medical Science Co Ltd; Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2021-05-28

Abstract

The invention provides a head swinging mechanism and a medical anastomat, wherein the head swinging mechanism comprises: the rotating component drives the swing pull rod to move along the axial direction of the anastomat when rotating; the elastic piece is at least partially arranged on the outer side surface of the rotating component in a protruding mode and comprises at least one protruding portion, and the protruding portion protrudes towards the direction far away from the rotating shaft of the rotating component; the casing is provided with the holding tank that holds rotary part, just the inside wall of holding tank is provided with at least one notch, rotary part for the casing rotate to the bellying of elastic component with the notch is relative, the bellying at least part gets into the notch. By adopting the invention, through the matching of the convex part of the elastic piece and the notch of the shell, an operator can conveniently set different swing angles of the nail head, and the uncontrollable swing of the nail head can be avoided.

Description

Head swinging mechanism and medical anastomat

Technical Field

The invention relates to the technical field of medical instruments, in particular to a head swinging mechanism and a medical anastomat.

Background

A linear stapler generally comprises an instrument platform mounted on the head of the platform, which can be passed through a small incision in the body by means of a puncture instrument to access the surgical site for performing the operation. Specifically, the instrument platform comprises a firing handle, the head comprises a nail box shell and a nail head part arranged on the far end side of the nail box shell, a firing assembly is arranged inside the nail box shell, and the nail head part is a part for implementing cutting and suturing actions. Under the drive of the firing handle, the firing assembly can drive the nail head to complete the suture and incision operation.

In order to realize the swinging of the nail head relative to the nail box shell, a swinging pull rod is arranged in the nail box shell, the near end side of the swinging pull rod is connected to a swinging driving piece, the far end side of the swinging pull rod is rotatably fixed on the near end side of the nail head, and when the swinging driving piece drives the swinging pull rod to move along the axial direction of the nail box shell, the far end side of the swinging pull rod drives the nail head to swing clockwise or anticlockwise relative to the nail box shell.

Among the current linear type anastomat, when the yaw was swung, be difficult to set up wobbling angle to in the use, uncontrollable swing phenomenon still can appear in the pin head, thereby causes the uncontrollable of pin head swing angle, leads to the unable accurate location of the pin head of anastomat, influences the operation effect.

In the present invention, the distal side and the proximal side are relative to the operator, and the end closer to the operator is the proximal side, and the end farther from the operator, i.e., the end closer to the surgical site is the distal side.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a head swinging mechanism and a medical anastomat, which are convenient for an operator to set different swinging angles of a nail head through the matching of a convex part of an elastic part and a concave opening of a shell, and can avoid the uncontrollable swinging of the nail head.

The embodiment of the invention provides a head swinging mechanism for a medical anastomat, which comprises:

the rotating component is matched with the swing pull rod, so that the rotating component drives the swing pull rod to move along the axial direction of the anastomat when rotating;

the elastic piece is at least partially arranged on the outer side surface of the rotating component in a protruding mode and comprises at least one protruding portion, and the protruding portion protrudes towards the direction far away from the rotating shaft of the rotating component;

the casing, the casing is provided with the holding tank that holds rotary part, just the inside wall of holding tank is provided with at least one notch, rotary part for the casing rotate to the bellying of elastic component with the notch is relative to, the bellying at least part gets into the notch.

Optionally, the elastic element includes at least one elastic sheet, the protrusion is formed between two ends of the elastic sheet, and the protrusion protrudes towards a direction away from the rotating shaft of the rotating element compared to the two ends of the elastic sheet.

Optionally, at least one end of the resilient tab is fixed to the rotating member.

Optionally, corresponding to each elastic sheet, the outer side surface of the rotating component is provided with two elastic sheet mounting grooves corresponding to the two end portions of the elastic sheet one to one, and the two end portions of the elastic sheet are arranged in the corresponding elastic sheet mounting grooves.

Optionally, the elastic piece mounting groove includes an extension section and an inclined section communicated with a first end of the extension section, the inclined section and the extension section are arranged at an included angle, the inclined section is communicated with an outer side surface of the rotating component, an end of the elastic piece is located in the extension section, and a protruding portion of the elastic piece is located in the inclined section.

Optionally, the elastic piece mounting groove corresponding to at least one end of the elastic piece further includes a fixing section communicated with the second end of the extension section, the fixing section and the extension section are arranged at a certain included angle, and the fixing section accommodates the corresponding end of the elastic piece.

Optionally, the elastic element comprises at least one metal ring, the metal ring is sleeved on the outer side surface of the rotating component, and the metal ring is formed with at least one protruding part.

Optionally, the outer side surface of the rotating component is provided with a metal ring mounting groove in an inward concave manner, and the metal ring is embedded in the metal ring mounting groove.

Optionally, the metal ring mounting groove is annular, the metal ring is arranged in an annular shape, and at least one of the two ends of the metal ring is fixed to the rotating component.

Optionally, the protrusion includes a first guide surface and a second guide surface that are obliquely arranged, so that a width of an end of the protrusion away from the rotating member is smaller than a width of an end of the protrusion close to the rotating member.

Optionally, the notch comprises an initial position notch and a non-initial position notch, the initial position notch having a depth greater than the non-initial position notch.

Optionally, a center line of each of the protrusions passes through a center of the rotating member when viewed from a top of the rotating member.

Optionally, when viewed from the top of the rotating member, a center line of each of the protrusions does not pass through a center of the rotating member.

Optionally, the rotating component comprises:

the rotating shaft is matched with the swinging pull rod, so that the rotating shaft drives the swinging pull rod to move along the axial direction of the anastomat when rotating;

the rotating block is matched with the rotating shaft, so that the rotating shaft is driven to rotate when rotating, and the elastic piece is arranged on the outer side face of the rotating block.

Optionally, a first matching portion is arranged on the outer side face of the rotating shaft, a first through hole is formed in the rotating block, a second matching portion is arranged on the inner side face of the first through hole, the rotating shaft penetrates through the first through hole, and the first matching portion of the rotating shaft and the second matching portion of the rotating block are matched to form a connection which cannot rotate relatively.

Optionally, the head swinging mechanism further comprises an end cover arranged above the rotating block, a second through hole is formed in the end cover, and the rotating shaft penetrates through the second through hole;

the bottom of end cover is provided with spacing post, the casing still is provided with the end cover fixed slot, spacing post inserts in the end cover fixed slot.

Optionally, the turning block includes a first step portion and an elastic member mounting portion, the first step portion is located above the elastic member mounting portion, the elastic member is mounted on the outer side surface of the elastic member mounting portion, and the diameter of the first step portion is smaller than that of the elastic member mounting portion.

Optionally, the turning block includes a second step portion and an elastic member mounting portion, the second step portion is located above the elastic member mounting portion, the elastic member is mounted on the outer side surface of the elastic member mounting portion, and the diameter of the second step portion is greater than that of the elastic member mounting portion.

Optionally, at a position corresponding to the protruding portion of the elastic member, an outer diameter of the elastic member mounting portion is smaller than outer diameters of other positions of the elastic member mounting portion.

Optionally, the head swing mechanism further comprises a connecting piece, a disc-shaped base is arranged at the bottom of the rotating shaft, the disc-shaped base is connected to the head swing pull rod through a connecting piece, and the disc-shaped base is eccentrically connected with the connecting piece.

Optionally, the head swinging mechanism further comprises a swinging button, the swinging button is connected with the upper portion of the rotating shaft, and the rotating shaft is driven to rotate when the swinging button rotates.

The embodiment of the invention also provides a medical anastomat which comprises the head swinging mechanism.

The head swinging mechanism and the medical anastomat provided by the invention have the following advantages:

the invention provides a head swinging mechanism for a medical anastomat, which is convenient for an operator to set different swinging angles of a nail head part through the matching of a convex part of a rotating part and a notch of a shell, can accurately control the axial moving distance of a head swinging pull rod matched with the rotating part, further accurately control the swinging angle of the nail head part, and can avoid the uncontrollable swinging of the nail head part because the convex part of the rotating part and the notch of the shell form relatively stable matching when no external force is applied.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a head swing mechanism according to a first embodiment of the present invention;

FIG. 2 is a top view of the yaw mechanism of the first embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIGS. 4 and 5 are exploded views of the yaw mechanism of the first embodiment of the present invention;

FIG. 6 is a schematic structural diagram of the swing head mechanism with the housing removed according to the first embodiment of the present invention;

FIG. 7 is a schematic structural view of the swing head mechanism with the swing button removed according to the first embodiment of the present invention;

FIG. 8 is a top view of the upper housing with different recess depths according to the first embodiment of the present invention;

FIG. 9 is a top view of the first embodiment of the present invention with different notch depths for the upper housing and spring plate mating;

FIG. 10 is a schematic view of a structure of the first embodiment of the present invention in which a rotation block is engaged with a resilient plate;

FIG. 11 is a perspective view of the swing head mechanism with the swing button and housing removed in accordance with the first embodiment of the present invention;

fig. 12 is a schematic structural view of a fixing manner of the resilient plate in the rotating block according to the first embodiment of the present invention;

FIG. 13 is a schematic structural view of another fixing manner of the resilient plate in the rotating block according to the first embodiment of the present invention;

FIG. 14 is a top view of the rotation block and the resilient plate according to the first embodiment of the present invention;

FIG. 15 is a top view of the first embodiment of the present invention with four resilient tabs disposed in the rotating block;

FIG. 16 is a top view of the rotary block with the eccentric resilient tab according to the first embodiment of the present invention;

FIG. 17 is a schematic view of the engagement of a turning block and a ferrule according to a second embodiment of the present invention;

FIG. 18 is a schematic view of a second embodiment of the present invention showing a metal ring embedded in a rotating block;

FIG. 19 is a schematic structural view of a turning block of the second embodiment of the present invention;

FIG. 20 is a perspective view of a second embodiment of the present invention with the eyelets embedded in the rotating blocks;

FIG. 21 is a schematic view of the third embodiment of the invention showing the engagement of the turning block with the end cap and the upper housing;

FIG. 22 is a schematic view showing a structure in which a rotary block according to a third embodiment of the present invention is engaged with an upper case;

FIG. 23 is a schematic view of the engagement of a turning block with an end cap according to a third embodiment of the present invention;

fig. 24 is a plan view of a turning block of a third embodiment of the present invention.

Reference numerals:

1 first guide surface of the rocking button 514

2 second guide surface of the rotating shaft 515

21 fixed pin 52 metal ring

22 first mating portion 521 metal ring projection

3 disc-shaped base 522 third guide surface

31 fourth guide surface of protruding shaft 523

4 rotating block 6 end cover

41 second matching part 61 limiting column

42 spring mounting groove 62 second through hole

421 fixed segment 7 upper shell

422 extension section 71 accommodating groove

423 inclined section 711 notch

43 ferrule mounting groove 712 initial position notch

44 first through hole 713 non-home position notch

45 elastic piece mounting part 8 lower shell

46 first step 9 connector

47 second step 91 mating hole

51 distal side of connector spring 92

First end 93 of 511 spring plate swing pull rod

Second end 931 of 512 spring leaves swings the distal side of the pull rod

513 bump 932 near the swing rod

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

The invention provides a head swinging mechanism for a medical anastomat and the medical anastomat comprising the nail bin. The anastomat comprises an instrument platform and a head, wherein the head comprises a nail box shell and a nail head, and the platform comprises a head swinging mechanism used for controlling the nail head to swing relative to the nail box shell. The head swinging mechanism comprises a shell, a rotating component and a head swinging pull rod, wherein the shell is provided with a holding groove for holding the rotating component, the rotating component is matched with the head swinging pull rod so that the rotating component drives the head swinging pull rod to move along the axial direction of the anastomat when rotating, therefore, the rotating component can be operated when the nail head swings, the rotating component drives the head swinging pull rod to move along the axial direction of the anastomat to drive the nail head to swing.

In order to facilitate the switching of different swing angles of the nail head and the avoidance of uncontrollable swing of the nail head by an operator, the head swing mechanism further comprises an elastic piece, at least part of the elastic piece is arranged on the outer side wall surface of the rotating component in a protruding mode, the elastic piece comprises at least one protruding portion, and the protruding portion protrudes towards the direction far away from the rotating shaft of the rotating component. The inner side wall of the accommodating groove is provided with at least one notch matched with the protruding part, and when the rotating component rotates relative to the shell until the protruding part of the elastic component is opposite to the notch, the protruding part at least partially enters the notch.

Therefore, when the nail head is controlled to swing, when an operator operates the rotating component to rotate, after the lug boss enters the notch, certain resistance and clamping are generated under the obstruction of the notch, and the lug boss can stay at the position of the notch, so that the rotating component is kept at the position at the moment; when the operator continues to operate the rotating component to rotate, the rotating force overcomes the elastic force of the lug boss to enable the lug boss to be disengaged from the notch to continue rotating, so that the lug boss enters the next notch and stays at the position of the notch at the moment. Since the position of the notch corresponds to the swing angle of the nail head, the rotation angle of the rotating component can be set by setting the position of the notch, and then different swing angles of the nail head can be set. In the operation process, a relatively stable matching relation can be formed through the matching of the convex part in the notch, and the nail head can be kept in a relatively stable state under the condition that external force is not applied artificially, so that the uncontrollable swinging of the nail head is avoided.

The structure of the head swing mechanism according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings, and it should be understood that the embodiments are not intended to limit the scope of the present invention.

As shown in fig. 1 to 16, the structure of the head swing mechanism according to the first embodiment of the present invention is shown. In this embodiment, as shown in fig. 1 to 6, the swing head mechanism includes a rotating member, a swing head lever 93, an elastic member, and a housing. The rotating component is matched with the swing pull rod 93, so that when the rotating component rotates, the swing pull rod 93 is driven to move along the axial direction of the anastomat, for example, when the rotating component rotates along a first direction, the swing pull rod 93 moves towards the far end side direction of the anastomat, and when the rotating component rotates along a second direction, the swing pull rod 93 moves towards the near end side direction of the anastomat.

In this embodiment, the elastic element is at least one elastic sheet 51 at least partially protruding from the outer wall surface of the rotating component, and the elastic sheet 51 includes at least one protruding portion 513, and the protruding portion 513 protrudes in a direction away from the rotating shaft of the rotating component. The housing includes an upper housing 7 and a lower housing, a receiving groove 71 for receiving the rotating member is provided in an inner circumferential portion of the upper housing 7, and at least one notch 711 is provided in an inner sidewall of the receiving groove 71. The rotating member is rotatable with respect to the housing, and as shown in fig. 7, the rotating member is rotated with respect to the housing until the protruding portion 513 of the elastic member is opposed to the recess 711, and the protruding portion 513 at least partially enters the recess 711.

Therefore, when the operator rotates the operation rotation member, the protrusion 513 enters the notch 711 with a certain resistance and is stuck and held in the notch 711, and when the operator continues to operate the rotation member to rotate, the rotation force overcomes the elastic force of the protrusion 513, so that the protrusion 513 comes out of the notch 711 to continue to rotate, enters the next notch 711, and stays at the position of the notch 711. Since the position of the notch 711 corresponds to the swing angle of the head, the rotation angle of the rotating member can be set by setting the position of the notch 711, and thus different swing angles of the head can be set. Thus, the notches 711 may be sequentially formed in the inner peripheral portion of the upper case 7, thereby providing different swing angles of the nail head. During operation, a relatively stable fitting relationship can be formed by the fitting of the protrusion 513 in the recess 711, and the stud can be maintained in a relatively stable state without applying an external force, thereby preventing uncontrolled swinging of the stud.

In the present invention, the distal side and the proximal side are relative to the operator, and the end closer to the operator is the proximal side, and the end farther from the operator, i.e., the end closer to the surgical site is the distal side. For example, in the perspective of fig. 6, for the swing link 93, the right side is the distal side 931, the distal side 931 of the swing link 93 is connected to the head, the left side of the swing link 93 is the proximal side 932, and the proximal side 932 of the swing link 93 is connected to the distal side 92 of the link 9. Above and below refer to above and below in the perspective of fig. 6, that is, the upper surface of the upper case 7 shown in fig. 7, and as shown in fig. 6, the swing button 1 is located above the end cap 6, the end cap 6 is located above the rotary block 4, and the disc-shaped base 3 is located below the rotary block 4. In the present invention, the inner and outer sides of a member are relative to the axial center of the member, and the side closer to the axial center is the inner side and the side farther from the axial center is the outer side.

As shown in fig. 4 to 6, the rotating component includes a rotating shaft 2 and a rotating block 4, a first through hole 44 is provided in the rotating block 4, and the rotating shaft 2 is inserted into the first through hole 44. The bottom of the rotating shaft 2 is provided with a disc-shaped base 3, the disc-shaped base 3 is connected with the swing head pull rod 93 through a connecting piece 9, and the far end side 92 of the connecting piece 9 is connected with the swing head pull rod 93. The disc-shaped base 3 is eccentrically connected to the connecting piece 9. Specifically, the bottom of the disc-shaped base 3 is provided with a protruding shaft 31, the connecting piece 9 is provided with a waist-shaped matching hole 91, and the protruding shaft 31 is arranged through the matching hole 91. We define the proximal to distal direction of the head as the axial direction of the stapler, preferably the fitting hole 91 is perpendicular to the axial direction of the stapler. In other alternative embodiments, a fitting hole may be provided in the bottom of the disc-shaped base 3, and a protruding shaft may be provided on the connecting member 9 through the fitting hole. The disc-shaped base 3 and the rotating shaft 2 may be integrally formed, or the disc-shaped base 3 and the rotating shaft 2 may be two separate but fixedly connected components. When the rotating shaft 2 rotates, the disk-shaped base part 3 is driven to rotate, and the disk-shaped base part 3 is eccentrically matched with the connecting piece 9 to drive the connecting piece 9 to move along the axial direction of the anastomat, so that the head swing pull rod 93 is driven to move along the axial direction of the anastomat.

As shown in fig. 4 to 6, in this embodiment, the head swing mechanism further includes an end cover 6 disposed above the rotating block 4, a second through hole 62 is disposed in the end cover 6, and the rotating shaft 2 passes through the second through hole 62; the bottom of end cover 6 is provided with spacing post 61, the casing still is provided with the end cover fixed slot, spacing post 61 inserts in the end cover fixed slot. The end cap 6 may limit the axial position of the rotating block 4, and prevent the rotating block 4 from being separated from the receiving groove 71 or the rotating block 4 from moving in the vertical direction. The turning block 4 is located in a space defined by the end cover 6 and the receiving groove 71, and the turning block 4 can only perform a rotational movement with respect to the upper case 7 and cannot move in an axial direction of the turning block 4.

As shown in fig. 7 to 13, the spring plate 51 is disposed on the outer side surface of the rotating block 4. In this embodiment, the rotating block 4 includes a first stepped portion 46 and an elastic member mounting portion 45, the first stepped portion 46 is located above the elastic member mounting portion 45, the elastic member is mounted on an outer side surface of the elastic member mounting portion 45, and a diameter of the first stepped portion 46 is smaller than a diameter of the elastic member mounting portion 45. The inside of the end cap 6 and the receiving groove 71 of the upper case 7 are formed in a shape to match the structure of the rotating block 4.

As shown in fig. 7, in one embodiment, each notch 711 in the receiving groove 71 of the upper housing 7 has the same shape and size, and each notch 711 has the same depth, that is, in a top view of the upper housing 7, a point where each notch 711 is farthest from a center of the receiving groove 71 is the same as a distance from the center of the receiving groove 71.

In another embodiment of the present invention, as shown in fig. 8 and 9, each of the recesses 711 may have a different depth. For example, the recesses 711 are divided into two types: an initial position notch 712 and a non-initial position notch 713, the initial position notch 712 having a depth greater than the non-initial position notch 713. The initial position notch 712 is located in the axial direction of the stapler. As can be seen from fig. 8, in the top view of the receiving groove 71, the distance between the point of the initial position notch 712 farthest from the center of the receiving groove 71 and the center of the receiving groove 71 is d1, the distance between the point of the non-initial position notch 713 farthest from the center of the receiving groove 71 and the center of the receiving groove 71 is d2, and d1 is greater than d 2. When the protrusion 513 of the resilient tab 51 is in the initial position notch 712, the distance between the point farthest from the center of the accommodating groove 71 and the center of the accommodating groove 71 is d3, when the protrusion 513 of the resilient tab 51 is in the non-initial position notch 713, the distance between the point farthest from the center of the accommodating groove 71 and the center of the accommodating groove 71 is d4, and d3 is greater than d 4.

One or more home position notches 712 may be provided, and one or more non-home position notches 713 may be provided. When the nail head is at the initial position, the protrusion 513 of the spring plate 51 is located in the initial position notch 712, and as the rotating block 4 rotates, the protrusion 513 of the spring plate 51 rotates to enter the non-initial position notch 713, and for an operator, the position of the initial position notch 712 can be determined by sensing the difference of the resistance, so that the initial position of the nail head can be determined more accurately, and the accurate positioning of the initial position of the nail head can be realized.

As shown in fig. 10 to 13, the head swing mechanism further includes a swing button 1, the swing button 1 is connected to the upper portion of the rotating shaft 2, and the rotating shaft 2 is driven to rotate when the swing button 1 rotates. In this embodiment, as shown in fig. 11, a fixing pin 21 is disposed at an upper portion of the rotating shaft 2, and two ends of the fixing pin 21 are fixed to an inner side surface of the swing button 1 to form a rotation linkage connection between the swing button 1 and the rotating shaft 2. As shown in fig. 10 and 11, a first matching portion 22 is disposed on an outer side surface of the rotating shaft 2, a first through hole 44 is disposed inside the rotating block 4, a second matching portion 41 is disposed on an inner side surface of the first through hole 44, the rotating shaft 2 passes through the first through hole 44, and the first matching portion 22 of the rotating shaft 2 and the second matching portion 41 of the rotating block 4 are matched to form a non-rotatable connection. In this embodiment, the first matching portion 22 is a groove on the outer side surface of the rotating shaft 2, and the second matching portion 41 is a protrusion on the inner side surface of the first through hole 44, and the protrusion is embedded in the groove of the rotating shaft 2. In other alternative embodiments, the first matching portion may be a convex strip or a convex block on the outer side surface of the rotating shaft 2, and the second matching portion may be a concave groove on the inner side surface of the first through hole 44; alternatively, the first matching portion may be another fixing pin inserted into the rotating shaft 2, the second matching portion is a blind hole on the inner side surface of the first through hole 44, and two ends of the fixing pin are inserted into the blind hole, which all fall within the protection scope of the present invention.

As shown in fig. 10, one or more elastic sheets 51 may be disposed on the outer side surface of the rotating block 4, and correspondingly, the number of the notches 712 is also plural, in this embodiment, two elastic sheets 51 are disposed opposite to each other on the outer side surface of the rotating block 4, so as to achieve a more stable fit between the elastic sheets 51 and the notches 712, but the invention is not limited thereto. The protruding portion 513 is formed between the first end 511 and the second end 512 of the elastic piece 51, the first end 511 and the second end 512 of the elastic piece 51 are arranged on the outer side surface of the rotating block 4, the protruding portion 513 protrudes out of the outer peripheral portion of the elastic piece mounting portion 45, and the protruding portion 712 is compared with two

end portions

511 and 512 of the elastic piece 51, and faces away from the direction of the rotating shaft of the elastic piece mounting portion 4. Preferably, as shown in fig. 10 and 7, at a position corresponding to the protruding portion 513, the outer diameter d5 of the elastic member mounting portion 45 is smaller than the outer diameter d6 of the other positions of the elastic member mounting portion 45, so as to provide a sufficient deformation space for the protruding portion 513 to prevent the protruding portion 513 from being stuck with the receiving groove 71 and the rotating block 4 during the rotation process driven by the swing button 1, especially during the stroke after being separated from the notch 71.

As shown in fig. 10, two elastic piece mounting grooves 42 corresponding to two end portions of the elastic pieces 51 are respectively formed in the outer side surface of the rotating block 4 corresponding to the elastic pieces 51, and the two end portions of the elastic pieces 51 are inserted into the corresponding elastic piece mounting grooves 42. Each spring piece mounting groove 42 comprises an extending section 422 and an inclined section 423 communicated with a first end of the extending section 422, the inclined section 423 and the extending section 422 form a certain included angle, and the inclined section 423 is communicated with the outer side surface of the rotating block 4. The inclined section 423 and the extending section 422 may form an obtuse angle between 90-180 degrees, so that when the elastic sheet 51 is pressed by the inner wall of the accommodating groove 71, the first end 511 and the second end 512 of the elastic sheet 51 extend towards two sides respectively to generate deformation. The end of the spring 51 is located in the extension segment 422, and the protrusion 513 of the spring 51 is partially located in the inclined segment 423. The other end of the extension 422 may also be connected to the outer side surface of the rotating block 4. When the elastic piece 51 enters the notch 711 of the receiving groove 71, a certain redundant space is formed between the first end 511 and the second end 512 of the elastic piece 51 and the second end of the extending section 422, so that when the elastic piece 51 deforms, the first end 511 and the second end 512 of the elastic piece 51 extend towards two sides respectively.

As shown in fig. 12 and 13, at least one end of the resilient piece 51 may be fixed to the rotation block 4. As shown in fig. 12, the first end 511 of the elastic piece 51 is fixed to the rotating block 4, and as shown in fig. 13, both the first end 511 and the second end 512 of the elastic piece 51 are fixed to the rotating block 4. The spring piece mounting groove 42 corresponding to the end of the spring piece 51 fixed to the rotating block 4 may further include a fixing section 421 communicated with the second end of the extending section 422, and the fixing section 421 and the extending section 422 may form an included angle between 0 and 180 degrees. The fixed segment 421 accommodates the end of the corresponding spring 51. The end of the elastic sheet 51 and the rotation block 4 may be fixed by other methods, such as welding, riveting, etc.

As shown in fig. 12, the projection 513 includes a first guide surface 514 and a second guide surface 515 which are obliquely arranged so that a width w2 of an end of the projection 513 away from the rotary block 4 is smaller than a width w1 of an end of the projection 513 close to the rotary block 4. When the protruding portion 513 rotates with the rotating block 4, the first guiding surface 514 and the second guiding surface 515 can better guide the protruding portion 513 to enter and leave the notch 711 of the receiving groove 71, and preferably, the first guiding surface 514 and the second guiding surface 515 are both smooth surfaces, so as to form smoother rotating action and avoid causing inconvenience to an operator due to excessive resistance.

In one embodiment, as shown in fig. 14, in a top view of the rotating block 4, a center line of each of the protrusions 513 passes through a center O1 of the rotating block 4. Here, the center line of the protrusion 513 is a center line bisecting the protrusion 513 in a plan view of the rotating block 4. In fig. 14, the center lines S1 and S2 of the protrusions 513 of the two resilient pieces 51 pass through the center O1 of the rotating block 4. As shown in fig. 15, which shows a top view of the rotating block 4 provided with four spring plates 51, the center lines S1, S2, S3 and S4 of the convex portions 513 of the four spring plates 51 all pass through the center O1 of the rotating block 4.

In another embodiment, as shown in fig. 16, in a top view of the rotating block 4, a center line of each of the protrusions 513 does not pass through a center O1 of the rotating block 4. In fig. 15, a top view of the rotating block 4 provided with four resilient pieces 51 is shown, and the center lines S1, S2, S3 and S4 of the protruding portions 513 of the four resilient pieces 51 do not pass through the center O1 of the rotating block 4. So that the turning block can be stably matched with the notch 71 when the turning block is turned clockwise and anticlockwise.

As shown in fig. 17 to 20, the structure of the rotation block and the elastic member of the swing head mechanism according to the second embodiment of the present invention is shown. This embodiment differs from the first embodiment in that the elastic member includes at least one metal ring 52, the metal ring 52 is fitted on the outer side surface of the rotating block 4, and the metal ring 52 is formed with at least one of the protrusions 521. Likewise, as shown in fig. 17, the protruding portion 521 includes a third guiding surface 522 and a fourth guiding surface 523 which are obliquely arranged, so that the width w4 of the end of the protruding portion 521 away from the rotating block 4 is smaller than the width w3 of the end of the protruding portion 521 close to the rotating block 4, thereby better guiding the protruding portion 521 to enter and leave the notch 711 of the receiving groove 71. The metal ring 52 may be formed by connecting steel cables end to end, for example, but the invention is not limited thereto, and in other alternative embodiments, the metal ring 52 may be formed by winding copper wires, iron wires, and the like.

Fig. 17 and 18 to 20 show two different fastening ways of the eyelet 52 to the turning block 4. The eyelet 52 shown in fig. 17 is clamped on the outer side of the turning block 4. Fig. 18 to 20 show that the metal ring 52 is embedded in a metal ring mounting groove 43 on the outer side surface of the rotating block 4, and the metal ring mounting groove 43 is a groove in which the outer side surface of the rotating block 4 is recessed inward. In this embodiment, the metal ring mounting groove 43 is annular, the metal ring 52 is correspondingly arranged in an annular shape, and after the metal ring 52 is inserted into the annular metal ring mounting groove 43, at least one of the two ends of the metal ring 52 is fixed to the rotating block 4.

The end of the metal ring 52 and the rotating block 4 may be fixed in various ways, for example, a fixing groove is further formed in the metal ring mounting groove 43, the end of the metal ring 52 is inserted into the fixing groove, or the end of the metal ring 52 is fixed in the rotating block 4 by welding or riveting, which falls within the protection scope of the present invention.

The rotating block 4 and the elastic member of this embodiment may be combined with the components of the first embodiment, for example, the rotating block 4 and the elastic sheet 51 of the first embodiment shown in fig. 1 to 16 are directly replaced by the rotating block 4 and the metal ring 52 of this embodiment, so as to obtain a new structure, and the present invention also falls into the protection scope of the present invention.

As shown in fig. 21 to 24, a structure of a rotating block of a third embodiment of the present invention is shown to be engaged with an upper case and an end cap. This embodiment differs from the first embodiment in that the structure of the turning block 4 is different, and accordingly, the structure of the end cap 6 and the structure of the receiving groove 71 of the upper housing 7 are adaptively changed to define the movement space of the turning block 4. In this embodiment, the turning block 4 includes a second stepped portion 47 and an elastic member mounting portion 45, the second stepped portion 47 is located above the elastic member mounting portion 45, the elastic member is mounted on an outer side surface of the elastic member mounting portion 45, and a diameter of the second stepped portion 47 is larger than a diameter of the elastic member mounting portion 45. The structure can further improve the matching effect of the end cover 6 and the rotating block 4, improve the limiting effect of the end cover 6 on the axial movement of the rotating block 4, and avoid the rotating block 4 from moving up and down.

The elastic member mounting groove and the elastic member of the turning block 4 in this embodiment may adopt a structure of the spring piece mounting groove 42 plus the spring piece 51 of the turning block 4 of the first embodiment described above, or may adopt a structure of the metal ring mounting groove 43 plus the metal ring 52 of the turning block 4 of the second embodiment described above. In addition, the structure can also be combined with other structures of the first embodiment, for example, the structure of the third embodiment is combined with one or more of the rotating shaft, the swing button, the disk-shaped base and the connecting piece of the first embodiment shown in fig. 1 to 16 to obtain a new structure, and all of them fall within the protection scope of the present invention.

In other embodiments of the present invention, other structural modifications may be made, and other structural modifications within the scope of the present invention are within the scope of the present invention. For example, the housing of the yaw mechanism may not be divided into an upper housing and a lower housing, but an integral housing structure is adopted, or divided into a left housing and a right housing, a semicircular accommodating groove is formed on the left housing and the right housing, and a circular accommodating groove is obtained after the left housing and the right housing are spliced. For another example, the rotating shaft and the rotating block may be integrally provided as one component, that is, the rotating component is an integral component.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A yaw mechanism for a medical stapler, the yaw mechanism comprising:

2. The yaw mechanism of claim 1, wherein the elastic member comprises at least one spring, the protrusion is formed between two ends of the spring, and the protrusion protrudes in a direction away from the rotation axis of the rotating member compared to the two ends of the spring.

3. The yaw mechanism of claim 2, wherein at least one end of the spring plate is fixed to the rotating member.

4. The yaw mechanism of claim 2, wherein two spring plate mounting grooves corresponding to two end portions of the spring plates in a one-to-one manner are respectively formed in the outer side surfaces of the rotating member corresponding to the respective spring plates, and the two end portions of the spring plates are disposed in the corresponding spring plate mounting grooves.

5. The yaw mechanism of claim 4, wherein the spring mounting slot comprises an extension section and an inclined section communicated with a first end of the extension section, the inclined section is disposed at an angle with respect to the extension section, the inclined section is communicated with an outer side surface of the rotating component, an end of the spring is located in the extension section, and a protruding portion of the spring is located in the inclined section.

6. The yaw mechanism of claim 5, wherein the spring plate mounting groove corresponding to at least one end of the spring plate further comprises a fixing section communicated with the second end of the extension section, the fixing section and the extension section are arranged at a certain included angle, and the fixing section accommodates the corresponding end of the spring plate.

7. The yaw mechanism of claim 1, wherein the resilient member comprises at least one metal ring, the metal ring is fitted over an outer side surface of the rotating member, and the metal ring is formed with at least one of the protrusions.

8. The head oscillating mechanism according to claim 7, wherein the outer side surface of the rotating member is inwardly recessed with a ferrule mounting groove, and the ferrule is embedded in the ferrule mounting groove.

9. The yaw mechanism of claim 8, wherein the eyelet mounting slot is annular, the eyelet is disposed around the annular ring, and at least one of the two ends of the eyelet is secured to the rotating member.

10. The yaw mechanism of claim 1, wherein the boss includes first and second guide surfaces that are obliquely disposed such that a width of an end of the boss that is distal from the rotating member is smaller than a width of an end of the boss that is proximal to the rotating member.

11. The yaw mechanism of claim 1, wherein the notch comprises an initial position notch and a non-initial position notch, the initial position notch having a depth greater than a depth of the non-initial position notch.

12. The yaw mechanism of claim 1, wherein a center line of each of the bosses passes through a center of the rotating member when viewed from above the rotating member.

13. The yaw mechanism of claim 1, wherein a centerline of each of the bosses does not pass through a center of the rotating member when viewed from above the rotating member.

14. The yaw mechanism of claim 1, wherein the rotating member comprises:

15. The yaw mechanism of claim 14, wherein a first engagement portion is disposed on an outer side surface of the rotating shaft, a first through hole is disposed inside the rotating block, a second engagement portion is disposed on an inner side surface of the first through hole, the rotating shaft passes through the first through hole, and the first engagement portion of the rotating shaft and the second engagement portion of the rotating block are engaged to form a non-rotatable connection.

16. The yaw mechanism of claim 15, further comprising an end cap disposed above the turning block, wherein a second through hole is disposed in the end cap, and the rotating shaft passes through the second through hole;

17. The yaw mechanism of claim 14, wherein the turning block includes a first stepped portion and an elastic member mounting portion, the first stepped portion is located above the elastic member mounting portion, the elastic member is mounted on a side surface of the elastic member mounting portion, and a diameter of the first stepped portion is smaller than a diameter of the elastic member mounting portion.

18. The yaw mechanism of claim 14, wherein the turning block includes a second stepped portion and an elastic member mounting portion, the second stepped portion is located above the elastic member mounting portion, the elastic member is mounted on a side surface of the elastic member mounting portion, and a diameter of the second stepped portion is larger than a diameter of the elastic member mounting portion.

19. The yaw mechanism of claim 17 or 18, wherein the outer diameter of the spring mounting portion at a position corresponding to the protrusion of the spring is smaller than the outer diameter of the spring mounting portion at other positions.

20. The yaw mechanism of claim 14, further comprising a connecting member, wherein a bottom portion of the rotating shaft is provided with a disk-shaped base portion, the disk-shaped base portion is connected to the yaw rod through a connecting member, and the disk-shaped base portion is eccentrically connected to the connecting member.

21. The yaw mechanism of claim 14, further comprising a swing button coupled to an upper portion of the shaft, wherein rotation of the swing button causes the shaft to rotate.

22. A medical stapler, characterized in that it comprises a head swinging mechanism according to any one of claims 1 to 21.