CN105769113B - Apparatus locking switch and puncture outfit - Google Patents

Abstract

The instrument locking switch of the present invention comprises a handle, a rotating shaft, a locking curved surface, a shell and an instrument through hole. The center of the locking curved surface is low, and the edge is high; with the rotation of the rotating shaft, the height of the edge of the locking curved surface in the axial direction of the rotating shaft gradually changes, and an interference fit is gradually generated between the instrument locking switch and the instrument, and the instrument is locked in the instrument through inside the hole. Since the instrument locking switch adopts a locking method of rotating along the axis, the movement gap is smaller, the structure is more compact, and the instrument will not move up and down. Because the trocar of the present invention uses the device locking switch of the present invention, it has the advantages of compact structure, safety and reliability.

Description

Instrument lock switch and trocar

technical field

The invention relates to a laparoscopic surgical instrument, in particular to an instrument locking switch and a trocar used in laparoscopic surgery.

Background technique

Laparoscopic surgery has been more and more widely used. In order to avoid iatrogenic infection, the amount of disposable trocar (Trocar) used in laparoscopic surgery is also increasing. On the basis of ensuring the performance, the structure is simplified , reduce cost, improve performance, this trend has become the direction of trocar improvement.

In the prior art, the instrument locking switch is usually installed at the installation and combination surface of the upper cover and the lower cover of the casing, and is locked and loosened by swinging up and down along the axis. When the locking switch swings down along the axis, the locking switch is opened, and the instrument can be inserted and taken out from the mounting hole; when the locking switch swings upward along the axis, the locking switch is closed, and the instrument is fixed in the mounting hole. Because the existing technical scheme adopts the way of swinging up and down along the axis, during the opening and closing process of the instrument locking switch, the movement space required is relatively large. Surgical instruments, such as endoscopes, will make the instrument when the locking switch is closed. Move up and down along the surgical instrument through hole. In order to ensure that the device can be fixed in the mounting hole without moving, the device is usually fixed by means of interference fit at present. Therefore, local stress concentration inevitably occurs around the lock switch. When the stress is too large, the assembly of the upper cover and the lower cover near the locking switch will be loosened, and even the upper cover and the lower cover will be separated, thereby interrupting the operation process.

Due to the above defects in the prior art, it is necessary to improve the instrument locking switch and the trocar in the prior art.

Contents of the invention

The instrument locking switch of the present invention is characterized in that: the instrument locking switch 9 includes a handle 1, a rotating shaft 2, a locking curved surface 3, a housing 4, and an instrument through hole 5;

A. The locking curved surface 3 is arranged at the far end of the rotating shaft 2; the center 31 of the locking curved surface 3 is low, and the edge 32 is high, and is smoothly tilted from the center 31 to the edge 32; As the rotating shaft 2 rotates, the height of the edge 32 of the locking curved surface 3 in the axial direction of the rotating shaft 2 gradually changes;

B. The rotating shaft 2 contains a positioning groove 21; the housing 4 contains an upper cover 41, a lower cover 42, a rotating shaft mounting hole 43 and a rotating shaft positioning block 44; the rotating shaft 2 is installed in the rotating shaft mounting hole 43, the The rotating shaft positioning block 44 is embedded in the positioning groove 21; the rotating shaft 2 and the rotating shaft positioning block 44 are installed on the upper cover 41 and the lower cover 42 of the housing 4;

C. The centerline of the rotating shaft 2 and the centerline of the instrument through hole 5 are non-parallel lines;

D. The handle 1 is arranged at the proximal end of the rotating shaft 2 and exposed outside the casing 4 .

The rotating shaft 2 of the instrument locking switch 9 is installed in the rotating shaft installation hole 43, the rotating shaft positioning block 44 is embedded in the positioning groove 21, and the upper cover 41 and the lower cover 42 of the housing 4 are closed to complete Assembly of the instrument lock switch 9. After the instrument lock switch 9 is assembled, when the instrument 6 is placed in the instrument through hole 5, such as an endoscope, the rotating shaft 2 is rotated, and along with the edge 32 of the locking curved surface 3 in the axial direction As the height changes step by step, an interference fit is gradually produced between the instrument locking switch 9 and the instrument 6, and the contact force between the instrument locking switch 9 and the instrument 6 also gradually changes accordingly. When the rotating shaft 2 of the instrument locking switch 9 rotates to the set position, the instrument 6 is locked in the instrument through hole 5 .

Since the instrument locking switch 9 is locked by rotating along the axis, there is no need to reserve additional movement space for the instrument locking switch 9 during use, the structure is more compact, and the instrument will not move up and down. Since the interference fit between the instrument locking switch 9 and the instrument 6 is realized by gradually changing the height of the edge 32 of the locking curved surface 3 in the axial direction, the method adopted between the locking curved surface 3 and the instrument It is the way of surface contact, and at the same time, the increase of the locking force is also gradually increased, and the increase of the locking force is more gentle, so it is less likely to form stress concentration in the working process, and it is safer.

The locking positioning arc surface 33 is provided on the edge 32 of the locking curved surface 3 , and the arc surface 33 matches the cylindrical surface of the surface of the instrument 6 passing through the instrument through hole 5 . The locking and positioning arc surface 33 is arc-shaped with high sides and low center. When the rotating shaft 2 of the instrument locking switch 9 is rotated, after the locking positioning arc surface 33 of the locking curved surface 3 touches the instrument 6 in the instrument through hole 5, with the further rotation of the rotating shaft 2, the locking The switch 9 continues to move along the locking positioning arc surface 33 of the locking curved surface 3 to fit the surface of the instrument 6 . Since the positioning arc surface 33 adopts an arc design, as the rotation proceeds, from the arc-shaped end 33-1 to the arc-shaped bottom 33-2 of the positioning arc surface 33, the locking curved surface The degree of interference fit between 3 and the instrument 6 will be reduced accordingly, so the contact force between the instrument locking switch 9 and the instrument 6 will be reduced accordingly. Therefore, during use, when the rotating shaft 2 rotates until the locking positioning arc surface 33 is in contact with the instrument 6 , as the rotating shaft 2 continues to rotate, the user will feel a process of force reduction. The design of the locking and positioning arc surface 33 can facilitate the user to judge whether the locking switch 9 is locked in place.

Further, the centerline of the rotating shaft 2 is perpendicular to the centerline of the instrument through hole 5 . The center line of the rotating shaft 2 and the center line of the instrument through hole 5 are in a non-parallel relationship to realize the locking between the instrument locking switch 9 and the instrument 6, when the center line of the rotating shaft 2 When perpendicular to the central line of the instrument through hole 5, the locking effect between the instrument locking switch 9 and the instrument 6 is the best.

The present invention also includes a trocar, and the trocar 100 includes the device locking switch 9 described in claim 1 .

The device locking switch 9 of the present invention includes the handle 1 , the rotating shaft 2 , the locking curved surface 3 , the housing 4 and the device through hole 5 . The center 31 of the locking curved surface 3 is low, and the edge 32 is high. With the rotation of the rotating shaft 2, the height of the edge 32 of the locking curved surface 3 in the axial direction of the rotating shaft 2 gradually changes, and the instrument locking switch 9 An interference fit is gradually produced between the locking curved surface 3 and the instrument 6, and the instrument 6 is locked in the instrument through hole 5. Since the instrument locking switch 9 is locked by rotating along the axis, there is no need to reserve additional movement space for the instrument locking switch 9 during use, the structure is more compact, and the instrument will not move up and down. The trocar 100 using the instrument locking switch 9 of the present invention has the advantages of convenient and reliable instrument locking.

Description of drawings

Fig. 1 is a schematic structural view of an instrument locking switch of the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the rotating shaft of the instrument locking switch of the present invention.

Figure 2-1 is a top view of Figure 2

Figure 2-2 is the A-A sectional view of Figure 2-1.

Fig. 3 is a schematic structural view of the trocar of the present invention.

FIG. 4 is a partially exploded view of FIG. 3 .

In the above figure:

100 is a trocar according to the present invention, 101 is a puncture rod, and 102 is a sheath.

1 is a handle, 2 is a rotating shaft, 3 is a locking curved surface, 4 is a housing, 5 is an instrument through hole, 6 is an instrument, and 9 is an instrument locking switch of the present invention.

21 is the positioning groove on the rotating shaft; 31 is the center of the locking curved surface, 32 is the edge of the locking curved surface, 33 is the locking and positioning arc surface; 41 is the upper cover, 42 is the lower cover, 43 is the installation hole of the rotating shaft, and 44 is the positioning of the rotating shaft Piece.

detailed description

Embodiment 1: Instrument locking switch of the present invention

Referring to FIG. 1 , the instrument locking switch of the present invention includes a handle 1 , a rotating shaft 2 , a locking curved surface 3 , a housing 4 and an instrument through hole 5 .

The handle 1 is arranged at the proximal end of the rotating shaft 2 and is exposed outside the casing 4 .

The locking curved surface 3 is arranged at the far end of the rotating shaft 2; the center 31 of the locking curved surface 3 is low, and the edge 32 is high, and is smoothly tilted from the center 31 to the edge 32; The height of the edge 32 of the locking curved surface 3 in the axial direction of the rotating shaft 2 gradually changes.

The rotating shaft 2 includes a positioning groove 21 . The housing 4 includes an upper cover 41 , a lower cover 42 , a shaft mounting hole 43 and a shaft positioning block 44 . The rotating shaft 2 is installed in the rotating shaft installation hole 43, the rotating shaft positioning block 44 is embedded in the positioning groove 21, the rotating shaft 2 and the rotating shaft positioning block 44 are installed on the upper cover 41 and the lower cover 42 of the housing 4 superior.

The centerline of the rotating shaft 2 is perpendicular to the centerline of the instrument through hole 5 .

The rotating shaft 2 of the instrument locking switch 9 is installed in the rotating shaft installation hole 43, the rotating shaft positioning block 44 is embedded in the positioning groove 21, and the upper cover 41 and the lower cover 42 of the housing 4 are closed to complete Assembly of the instrument lock switch 9. After the instrument lock switch 9 is assembled, the rotating shaft 2 of the instrument locking switch 9 is placed in the open position, the instrument 6 is placed in the instrument through hole 5, and the rotating shaft 2 is rotated, and the The height of the edge 32 of the locking curved surface 3 in the axial direction gradually changes, and an interference fit is gradually generated between the instrument locking switch 9 and the instrument 6, and the distance between the instrument locking switch 9 and the instrument 6 The contact force also changes step by step. When the rotating shaft 2 of the instrument locking switch 9 is rotated to the off position, the instrument 6 is locked in the instrument through hole 5 .

Since the instrument locking switch 9 is locked by rotating along the axis, there is no need to reserve additional movement space for the instrument locking switch 9 during use, the structure is more compact, and the instrument will not move up and down. And because the interference fit between the instrument locking switch 9 and the instrument 6 is realized through the gradual change in the height of the edge 32 of the locking curved surface 3 in the axial direction, the locking curved surface 3 and the instrument take a The most important is the way of surface contact, and at the same time, the increase of the locking force is also gradually increased, and the increase of the locking force is more gentle, so it is less likely to form stress concentration in the working process and is safer.

Embodiment 2: Instrument locking switch with locking positioning arc surface of the present invention

Referring to Fig. 1, Fig. 2 to Fig. 2-2, the difference between this embodiment and Embodiment 1 is that the locking curved surface 3 in this embodiment is provided with a locking positioning arc surface 33, and the locking positioning arc surface 33 Matches the cylindrical surface of the surface of the instrument 6 passing through the instrument through hole 5 .

The locking and positioning arc surface 33 is arc-shaped with high sides and low center.

After the instrument locking switch 9 is assembled, when the rotating shaft 2 of the instrument locking switch 9 is rotated, the locking and positioning arc surface 33 of the locking curved surface 3 touches the instrument 6 in the instrument through hole 5, along with the With further rotation of the rotating shaft 2, the locking switch 9 continues to move along the locking positioning arc surface 33 of the locking curved surface 3 to fit the surface of the instrument 6. Since the positioning arc surface 33 adopts an arc design, as the rotation proceeds, from the arc-shaped end 33-1 to the arc-shaped bottom 33-2 of the positioning arc surface 33, the locking curved surface The degree of interference fit between 3 and the instrument 6 will be reduced accordingly, so the contact force between the instrument locking switch 9 and the instrument 6 will be reduced accordingly. Therefore, during use, when the rotating shaft 2 rotates until the locking positioning arc surface 33 is in contact with the instrument 6, as the rotating shaft 2 continues to rotate, the user will feel an obvious force reduction. process. The design of the locking and positioning arc surface 33 can facilitate the user to determine whether the locking switch 9 is locked in place.

Embodiment 3: trocar of the present invention

The trocar 100 of the present invention includes the instrument locking switch 9 described in claim 1 .

Referring to FIG. 3 to FIG. 4 , in this embodiment, the trocar 100 includes the device locking switch 9 described in Embodiment 1. The trocar 100 is composed of a puncture rod 101 and a sheath 102 , and the puncture rod 101 is inserted into the sheath 102 . The instrument locking switch 9 described in claim 1 is installed on the casing 4 at the top of the puncture rod 101 .

The rotating shaft 2 of the instrument locking switch 9 of the trocar 100 is installed in the rotating shaft installation hole 43 , and the rotating shaft positioning block 44 is embedded in the positioning groove 21 . Close the upper cover 41 and the lower cover 42 of the housing 4 of the instrument locking switch 9 to complete the assembly of the instrument locking switch 9 . Put the rotating shaft 2 of the instrument locking switch 9 in the open position, put the instrument 6 in the instrument through hole 5, such as an endoscope, rotate the rotating shaft 2, and follow the edge of the locking curved surface 3 32 stepwise changes in the height of the axial direction, the interference fit between the instrument lock switch 9 and the instrument 6 is gradually produced, and the force between the instrument lock switch 9 and the instrument 6 is also gradually changed . When the rotating shaft 2 of the instrument locking switch 9 is rotated to the off position, the instrument 6 is locked in the instrument through hole 5 .

Since the instrument lock switch 9 of the trocar of the present invention adopts a locking mode that rotates along the axis, there is no need to reserve additional movement space for the instrument lock switch 9 during use, and the structure is more compact, and the device can be closed or opened. When the appliance locks the switch 9, it will not cause the appliance 6 to move up and down. Since the interference fit between the instrument locking switch 9 and the instrument 6 is realized by gradually changing the height of the edge 32 of the locking curved surface 3 in the axial direction, the method adopted between the locking curved surface 3 and the instrument It is the way of surface contact, and at the same time, the increase of the locking force is also gradually increased, and the increase of the locking force is more gentle, so it is less likely to form stress concentration in the working process, and it is safer.

It should be noted that the structures disclosed and described herein can be replaced by other structures with the same effect, and the embodiments described in the present invention are not the only structures for realizing the present invention. Although preferred embodiments of the present invention have been described and described herein, it is clear to those skilled in the art that these embodiments are for illustration only, and that numerous changes, modifications and improvements can be made by those skilled in the art. Instead, without departing from the present invention, therefore, the protection scope of the present invention should be defined according to the spirit and scope of the appended claims of the present invention.

Claims (4)

1. apparatus locking switch, it is characterised in that：The apparatus locking switch (9) is containing handle (1), rotating shaft (2), locking curved surface (3), housing (4), apparatus through hole (5)；

A. the locking curved surface (3) is located at the distal end of the rotating shaft (2)；The center (31) of the locking curved surface (3) is low, edge (32) it is high, glossily tilted from the center (31) to the edge (32)；With the rotation of the rotating shaft (2), the locking The edge (32) of curved surface (3) is changed stepwise in the axial height of the rotating shaft (2)；

B. rotating shaft (2) (21) containing detent；The housing (4) is containing upper lid (41), lower cover (42), rotating shaft mounting hole (43) And rotating shaft locating piece (44)；The rotating shaft (2) is arranged in the rotating shaft mounting hole (43), and the rotating shaft locating piece (44) is inlayed In detent (21)；The rotating shaft (2), the rotating shaft locating piece (44) are arranged on the upper lid (41) and lower cover of housing (4) (42) on；

C. the center line of the rotating shaft (2) and the center line of the apparatus through hole (5) are non-flat line；

D. the handle (1) is located at the near-end of the rotating shaft (2), outside housing (4).

2. apparatus locking switch according to claim 1, it is characterised in that：Set on the edge (32) of the locking curved surface (3) There is the face of cylinder on the surface of the apparatus (6) passed through in locking positioning cambered surface (33), the cambered surface (33) and the apparatus through hole (5) Match.

3. apparatus locking switch according to claim 1, it is characterised in that：The central axis of the rotating shaft (2) is in described The center line of apparatus through hole (5).

4. puncture outfit, it is characterised in that the puncture outfit (100) is containing the apparatus locking switch (9) described in claim 1.