CN217066467U - Positioning mechanism of trigger push button of linear cutting anastomat - Google Patents

Abstract

The utility model discloses a positioning mechanism that button was pushed in percussion of sharp cutting anastomat, including the handle body, nail storehouse subassembly, support nail seat and ejector pad, movable mounting has the percussion to push away the button on the handle body, the percussion pushes away the button including pushing away button and connecting block, push away button sliding connection on the handle body, the connecting block is connected with the rear end of ejector pad, this internal still rotation of handle is connected with spacing cam, spacing cam's front end has the stopper that extends in the slant, the rear end of connecting block has the constant head tank, this internal elastic separation blade that is equipped with of handle, spacing cam's lower terminal surface contacts and pushes down elastic separation blade, elastic separation blade withstands spacing cam and makes the stopper implement the locking force to the constant head tank. In this way, the utility model discloses the positioning mechanism that the button was pushed in the percussion of sharp cutting anastomat can fix a position the button before the percussion operation of sharp cutting anastomat, prevents to push away the button because rock or weaker thrust produces the displacement by a wide margin, has avoided the mistake to hit and has sent out the operation.

Description

Positioning mechanism of trigger push button of linear cutting anastomat

Technical Field

The utility model relates to a sharp anastomat field especially relates to a positioning mechanism that button was pushed in percussion of sharp cutting anastomat.

Background

At present, a linear cutting stapler is widely applied to surgical operations, is used for wound suturing, internal tissue suturing and cutting and the like, and can cut off redundant tissues while performing wound suturing. In the anastomosis operation of organs and tissues which are difficult to expose and operate, the operation time can be reduced, and the operation quality can be improved.

The linear cutting anastomat mainly comprises a handle body, a push knife, a nail bin assembly and a nail abutting seat, wherein a push button used for controlling the push knife is arranged on the handle body, and the push button is pushed to advance by advancing driving of pushing the push button so as to carry out cutting and anastomotic operation.

However, in the actual operation process, if the push button is not positioned effectively before the firing operation, the operation of error firing is easily caused, thereby causing medical accidents; meanwhile, if a rigid mechanical structure is used for positioning, the operation difficulty is increased, and the inconvenience in use is caused.

Disclosure of Invention

The utility model discloses the technical problem of main solution provides a positioning mechanism that button was pushed in percussion of sharp cutting anastomat can fix a position the button before the percussion operation of sharp cutting anastomat, prevents to push away the button because rock or weaker thrust produces the displacement by a wide margin, has avoided the mistake to hit and has sent out the operation.

In order to solve the technical problem, the utility model discloses a technical scheme be: the positioning mechanism comprises a handle body, wherein the front end of the handle body is connected with a nail bin assembly and a nail abutting seat, a nail pushing plate connected with the nail bin assembly is arranged in the handle body, a percussion pushing button is movably mounted on the handle body and comprises a pushing button and a connecting block, the pushing button is connected onto the handle body in a sliding manner, the connecting block is connected with the rear end of the nail pushing plate, a limiting cam is also rotatably connected in the handle body, the front end of the limiting cam is provided with a limiting block extending obliquely upwards, the rear end of the connecting block is provided with a positioning groove, the limiting block extends into the positioning groove to enable the connecting block to be movably connected with the limiting cam, an elastic blocking piece is arranged in the handle body, the lower end face of the limiting cam is in contact with and presses the elastic blocking piece downwards, and the elastic blocking piece abuts against the limiting cam to enable the limiting block to exert locking force on the positioning groove, the push button drives the connecting block to advance, and the connecting block pushes the limiting block to drive the limiting cam to rotate anticlockwise, so that the connecting block is separated from the limiting cam.

The utility model discloses a preferred embodiment, still be equipped with contact surface A in the connecting block, contact surface A is located the right side of constant head tank, contact surface B has on the stopper, the stopper gets into and makes contact surface A and contact surface B contact in the constant head tank, the connecting block translation makes contact surface A promote contact surface B to make limiting cam rotate.

The utility model discloses a preferred embodiment, limiting cam's lower extreme has the cambered surface and is located the spacing face of cambered surface front end, the elastic catch withstands the cambered surface and makes the stopper implement the locking force to the constant head tank, the stopper rotates and breaks away from the connecting block and makes the cambered surface slide along the elastic catch to make spacing face top tight elastic catch with fixed limiting cam.

In a preferred embodiment of the present invention, the rear end of the connecting block has an arc-shaped pushing surface, the stop cam has a protrusion at a position corresponding to the contact surface B, and the connecting block retreats to make the arc-shaped pushing surface push the protrusion to drive the stop cam to rotate clockwise to make the contact surface B of the stopper enter the positioning groove along the contact surface a.

In a preferred embodiment of the present invention, the contact surface a and the contact surface B are inclined contact surfaces along the lower right.

In a preferred embodiment of the present invention, the connecting block has a connecting groove formed at a front end thereof, the rear end of the nail pushing plate is movably connected to the connecting block through the connecting groove, the connecting block has a fixed pushing block at a middle portion thereof, and the connecting block advances to contact the fixed pushing block with the rear end of the nail pushing plate to push the nail pushing plate.

In a preferred embodiment of the present invention, the upper end of the limit cam is rotatably connected to the handle body through a rotating shaft.

In a preferred embodiment of the present invention, the handle body has a slide rail axially disposed on the housing, the push button has a slide groove cooperating with the slide rail, and the push button is movably connected to the slide rail and slides along the slide rail.

The utility model has the advantages that: the utility model discloses the positioning mechanism that the button was pushed in percussion of sharp cutting anastomat, spacing cam are connected with the connecting block cooperation, and the elasticity separation blade supports spacing cam both to form flexible fixed knot and constructs, and spacing cam provides the locking force to the connecting block, and this locking force can avoid pushing away the button because rock by a wide margin or more weak thrust produces the displacement, avoids non-operating personnel to promote to push away the button slip that the button leads to and wrong percussion.

The utility model discloses the firing of sharp cutting anastomat pushes away the positioning mechanism of button, promotes to push away the button and can make the connecting block push away spacing cam anticlockwise rotation, and under inclined plane A and inclined plane B's cooperation, the elasticity anticlockwise rotation of elastic catch is overcome to spacing cam, and the stopper breaks away from the constant head tank, and connecting block and spacing cam separation push away the button and go forward and can fire sharp cutting anastomat smoothly this moment, through non-rigid mechanical location structure, have reduced the operation degree of difficulty.

The utility model discloses the firing of sharp cutting anastomat pushes away the positioning mechanism of button, pushes away the button firing at the firing after, and connecting block and spacing cam push away face and bellying cooperation through the arc, and the spacing lug of being convenient for resets fast, once more with connecting block cooperation and locking connection piece.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic structural view of a preferred embodiment of a positioning mechanism for a firing push button of a linear cutting stapler according to the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a schematic perspective view of a connecting block;

FIG. 4 is a schematic structural view of a limit cam;

FIG. 5 is a partial schematic view of another state of FIG. 1;

FIG. 6 is a partial schematic view of another state of FIG. 1;

the parts in the drawings are numbered as follows: 1. the handle body, 11, slide rail, 2, nail storehouse subassembly, 3, support the nail seat, 4, push away the nail board, 5, the percussion pushes away the button, 51, pushes away the button, 511, the spout, 52, the connecting block, 521, the constant head tank, 522, the arc pushes away the face, 523, the spread groove, 524, fixed ejector pad, 6, spacing cam, 61, pivot, 62, stopper, 63, cambered surface, 64, spacing face, 65, bellying, 7, elastic catch, contact surface A, contact surface B.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 to 4, a positioning mechanism for a firing push button of a linear cutting stapler includes a handle body 1 (in order to show structures of a firing push button 5 and a limit cam 6, a part of a housing part outside the handle body 1 is omitted from illustration), a staple cartridge assembly 2 and a staple abutting seat 3 are connected to a front end of the handle body 1, a staple pushing plate 4 connected to the staple cartridge assembly 2 is disposed in the handle body, the handle body 1 is movably mounted with the firing push button 5, the firing push button 5 includes a push button 51 and a connecting block 52, a sliding rail 11 axially disposed is disposed on a housing of the handle body 1, a sliding groove 511 matched with the sliding rail 11 is disposed on the push button 51, and the push button 51 is movably connected to the sliding rail 11 and slides along the sliding rail 11. The structures of the handle body 1, the nail bin assembly 2, the nail pushing seat 3 and the nail pushing plate 4 in the linear cutting anastomat are conventional structures of the existing linear cutting anastomat, and the internal structure of the linear cutting anastomat is the same as or similar to that of the existing linear cutting anastomat.

Push away button 51 sliding connection on handle body 1, connecting block 52 is connected with the rear end of ejector pin board 4, still rotate in the handle body 1 and be connected with spacing cam 6, spacing cam 6's upper end is rotated through pivot 61 and is connected on handle body 1, spacing cam 6's front end has the stopper 62 that extends in the slant, connecting block 52's rear end has constant head tank 521, stopper 62 makes connecting block 52 and 6 swing joint of spacing cam in stretching into constant head tank 521, be equipped with elastic catch 7 in the handle body 1, spacing cam 6's lower terminal surface contact and press down elastic catch 7, elastic catch 7 withstands spacing cam 6 and makes stopper 62 implement the locking force to constant head tank 521, it advances to push away the button and drive connecting block 52, connecting block 52 promotes spacing cam 62 and drives 6 anticlockwise rotations, thereby make connecting block 52 and spacing cam 6 separate.

Because the limiting block 62 extends into the positioning slot 521, the limiting block 62 contacts with the positioning slot 521, the lower end of the limiting cam 6 receives the upward elastic force of the elastic baffle 7, the elastic force is transmitted to the limiting block 62, because the limiting block 62 contacts with the positioning slot 521, a locking force is generated between the limiting cam 6 and the connecting block 52, the locking force is close to the elastic force of the elastic baffle 7, when the push button 51 receives a slight forward thrust (i.e. the thrust is smaller than the locking force of the limiting cam 6 and the connecting block 52), the push button 51 cannot move forward, under the condition that the push button 51 receives a slight thrust (e.g. jolt in the transportation process, fall from a high place or touch by fingers), the connecting block 52 cannot overcome the locking force to push the limiting cam 6 to rotate, which is equivalent to that a flexible positioning structure is formed among the elastic baffle 7, the limiting cam 6 and the connecting block 52, and is relatively to a rigid mechanical fixing structure, such a positioning structure can effectively lock the push button 51 and facilitate the pushing of the push button 51 for the operation.

Still be equipped with contact surface A in the connecting block 52, contact surface A is located the right side of constant head tank 521, has contact surface B on the stopper 62, and stopper 62 gets into and makes contact surface A and contact surface B contact in the constant head tank 521, and connecting block 52 translation makes contact surface A promote contact surface B to make stop cam 6 rotate. The contact surface a and the contact surface B are both contact surfaces inclined in the lower right direction. The contact surfaces A and B can be adjusted according to the required locking force, but the inclination angles of the contact surfaces A and B are limited to the upper limit, and the upper limit is not more than the limit that the limit cam 6 and the connecting block 52 are completely locked. The preferred angle of inclination of contact surfaces a and B is 45 degrees.

The lower end of the limiting cam 6 is provided with an arc surface 63 and a limiting surface 64 positioned at the front end of the arc surface 63, the elastic blocking piece 7 abuts against the arc surface 63 to enable the limiting block 62 to apply locking force to the positioning groove 521, the limiting block 62 rotates to be separated from the connecting block 52 to enable the arc surface 63 to slide along the elastic blocking piece 7, and the limiting surface 64 abuts against the elastic blocking piece 7 to fix the limiting cam 6. When the push button 51 is pushed to drive the connecting block 52 to move forward, the limiting cam 6 slowly rotates along the anticlockwise direction, as shown in fig. 5 in the initial state, the arc surface 63 is in contact with the elastic retaining piece 7, after the limiting cam 6 slowly rotates, the arc surface 63 is separated from the elastic retaining piece 7, then the limiting surface 64 starts to be in contact with the elastic retaining piece 7 until the limiting cam 6 rotates to the limit position as shown in fig. 6, the limiting surface 64 also presses the elastic piece to the limit position, the elastic retaining piece 7 tightly supports the limiting surface 64, at the moment, the limiting cam is completely separated from the connecting block 52, and meanwhile, the limiting cam 6 is locked and cannot rotate any further. At this point, the limit cam 6 releases the push button 51, and the push button 51 can slide forward to operate.

The rear end of the connecting block 52 is provided with an arc-shaped pushing surface 522, the position of the limiting cam 6 opposite to the contact surface B is provided with a boss 65, and the connecting block 52 retreats to enable the arc-shaped pushing surface 522 to push the boss 65 to drive the limiting cam 6 to rotate clockwise, so that the contact surface B of the limiting block 62 enters the positioning groove 521 along the contact surface a. When the trigger push button 5 finishes triggering and retreating, the arc-shaped push surface 522 at the rear end of the connecting block 52 contacts with the boss 65 on the limiting cam 6 firstly, the arc-shaped push surface 522 pushes the boss 65, then the limiting cam 6 rotates clockwise, the limiting surface 64 is separated from the elastic blocking piece 7, the arc surface 63 contacts the elastic blocking piece 7 again, the limiting block 62 enters the positioning groove 521 again, and the positioning of the trigger push button 5 is finished again.

The connecting groove 523 is formed in the front end of the connecting block 52, the rear end of the nail pushing plate 4 penetrates through the connecting groove 523 and is movably connected into the connecting block 52, the fixed pushing block 524 is arranged in the middle of the connecting block 52, and after the pushing button 51 drives the connecting block 52 to move forward, the connecting block 52 moves forward to enable the fixed pushing block 524 to be in contact with the rear end of the nail pushing plate 4 to push the nail pushing plate 4.

Be different from prior art, the utility model discloses the positioning mechanism that the button was pushed in the percussion of sharp cutting anastomat can fix a position the button before the percussion operation of sharp cutting anastomat, prevents to push away the button because rock or weaker thrust produces the displacement by a wide margin, has avoided the mistake to hit the operation.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims (8)

1. A positioning mechanism of a firing push button of a linear cutting anastomat comprises a handle body, wherein the front end of the handle body is connected with a nail bin assembly and a nail abutting seat, a nail pushing plate connected with the nail bin assembly is arranged in the handle body, and a firing push button is movably arranged on the handle body, and the positioning mechanism is characterized in that the firing push button comprises a push button and a connecting block, the push button is connected on the handle body in a sliding manner, the connecting block is connected with the rear end of the nail pushing plate, a limit cam is also rotatably connected in the handle body, the front end of the limit cam is provided with a limiting block extending upwards in an inclined manner, the rear end of the connecting block is provided with a positioning groove, the limiting block extends into the positioning groove to enable the connecting block to be movably connected with the limit cam, an elastic blocking piece is arranged in the handle body, the lower end face of the limit cam is contacted with and presses the elastic blocking piece downwards, and the elastic blocking piece abuts against the limit cam to enable the limiting block to apply locking force to the positioning groove, the push button drives the connecting block to advance, and the connecting block pushes the limiting block to drive the limiting cam to rotate anticlockwise, so that the connecting block is separated from the limiting cam.

2. The positioning mechanism for the firing push button of the linear cutting stapler as claimed in claim 1, wherein a contact surface a is further disposed in the connecting block, the contact surface a is located at the right side of the positioning slot, the limiting block has a contact surface B, the limiting block enters the positioning slot to make the contact surface a contact with the contact surface B, and the connecting block translates to make the contact surface a push the contact surface B, so as to make the limiting cam rotate.

3. The positioning mechanism for the trigger push button of the linear cutting anastomat as claimed in claim 2, wherein the lower end of the limit cam is provided with an arc surface and a limit surface positioned at the front end of the arc surface, the elastic blocking piece abuts against the arc surface to enable the limit block to apply locking force to the positioning groove, the limit block rotates to separate from the connecting block to enable the arc surface to slide along the elastic blocking piece, and the limit surface abuts against the elastic blocking piece to fix the limit cam.

4. The positioning mechanism for the firing push button of the linear cutting anastomat as claimed in claim 3, wherein the rear end of the connecting block is provided with an arc-shaped push surface, the limiting cam is provided with a convex part at a position opposite to the contact surface B, and the connecting block retreats to enable the arc-shaped push surface to push the convex part to drive the limiting cam to rotate clockwise so that the contact surface B of the limiting block enters the positioning groove along the contact surface A.

5. The positioning mechanism for the firing push button of the linear cutting stapler according to claim 4, wherein the contact surface A and the contact surface B are both contact surfaces inclined along the lower right direction.

6. The positioning mechanism for the firing push button of the linear cutting anastomat as claimed in any one of claims 1 to 5, wherein the front end of the connecting block is provided with a connecting groove, the rear end of the nail pushing plate is movably connected in the connecting block through the connecting groove, the middle part of the connecting block is provided with a fixed push block, and the connecting block advances to enable the fixed push block to contact with the rear end of the nail pushing plate so as to push the nail pushing plate.

7. The positioning mechanism for the firing push button of the linear cutting anastomat as claimed in claim 6, wherein the upper end of the limit cam is rotatably connected to the handle body through a rotating shaft.

8. The positioning mechanism for the trigger push button of the linear cutting stapler according to claim 7, wherein the housing of the handle body has a slide rail disposed along an axial direction, the push button has a slide groove engaged with the slide rail, and the push button is movably connected to the slide rail and slides along the slide rail.

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