CN219422875U - Knife edge expander - Google Patents

Abstract

The utility model provides a knife edge expander, which comprises a spreading mechanism and a spreading opening capable of being opened and closed, wherein the spreading opening is opened and closed by the spreading mechanism; the opening comprises two opening arms; the expanding mechanism comprises at least two first supporting rods, at least two second supporting rods, a sliding block and a sliding rail, wherein the sliding block is arranged on the sliding rail in a sliding manner, the front ends of the two expanding arms are respectively hinged with the sliding rail through one first supporting rod, and the rear ends of the two expanding arms are respectively hinged with the sliding block through one second supporting rod; pushing the sliding block, and opening or closing the opening. In the utility model, the proper opening width of the opening can be selected according to the incision length, so that a doctor of a main knife can obtain a good operation field.

Description

Knife edge expander

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a knife edge expander.

Background

In recent years, the incidence rate of breast tumors is gradually increased, and the conventional treatment means is to perform surgery on patients to remove tumor lesions. In the traditional operation, the incision is large, and the pursuit of the beauty of the patient cannot be met. Miniaturization of surgical wounds is becoming an increasingly sought after by doctors and patients, and with the miniaturization of incisions, the lack of internal vision is becoming a critical issue to be addressed. Accordingly, in order to expand the surgical field and maintain a clear and complete exposure of the field, a corresponding pulling device is required. In the operation process, the traction device needs assistant operation to be always in a lifting state, and the assistant needs whole auxiliary cooperation; not only increases the occupation of human resources, but also the manual traction can not ensure stable strength, which easily causes skin tearing at the incision, affects the operation, and increases the pain of patients. Thus, there is a need for a knife edge dilator for use in breast tumor resection procedures.

Disclosure of Invention

In order to solve the problems, the utility model provides a knife edge expander, which comprises a spreading mechanism and a spreading opening which can be opened and closed by the spreading mechanism;

the opening comprises two opening arms; the expanding mechanism comprises at least two first supporting rods, at least two second supporting rods, a sliding block and a sliding rail, wherein the sliding block is arranged on the sliding rail in a sliding manner, the front ends of the two expanding arms are respectively hinged with the sliding rail through one first supporting rod, and the rear ends of the two expanding arms are respectively hinged with the sliding block through one second supporting rod; pushing the sliding block, and opening or closing the opening.

Preferably, two of the spreader arms are arranged in parallel.

Preferably, the opening mechanism further comprises a hinged fixing block, the hinged fixing block is fixed at the front end of the sliding rail, and one ends of the two first supporting rods are hinged with the hinged fixing block; the other ends of the two first support rods are respectively hinged with the front ends of the two supporting arms.

Preferably, one end of the second support rod is hinged to the rear end of the corresponding supporting arm, and the other end of the second support rod is hinged to the sliding block.

Preferably, the knife edge expander further comprises a locking mechanism, wherein the locking mechanism comprises a fixed part and a movable part, the fixed part is fixed on the sliding rail, and the fixed part comprises a plurality of first teeth; the movable part is fixed on the sliding block and comprises a plurality of second teeth which are matched with the first teeth; the first tooth is engaged with the second tooth to lock the stay opening.

Preferably, the first teeth and the second teeth are unidirectional teeth, and the inclination angle of the first teeth is different from and complementary to the inclination angle of the second teeth.

Preferably, the fixing part further comprises a vertical rod and a parallel rod, the vertical rod is fixedly connected with the parallel rod to form an L shape, the vertical rod is vertically and fixedly connected with the sliding rail, the parallel rod is parallel to the sliding rail, and a plurality of first teeth are fixed on the side face, facing the sliding rail, of the parallel rod.

Preferably, a pushing part for pushing by an operator is also fixedly arranged on the sliding block.

Preferably, the pushing part is provided with anti-skid patterns.

Preferably, the knife edge expander is suitable for breast tumor excision operation.

Compared with the prior art, the utility model has the following technical effects:

1. the utility model provides a knife edge expander, which comprises an openable opening and a stretching mechanism, wherein the opening is opened and closed through the stretching mechanism, and the stretching width can be selected by the stretching opening according to the length of an incision, so that a doctor of a main knife can obtain a good operation view.

2. The opening width can be locked through the locking mechanism to replace manual control, so that manpower resources are saved, and the opening stability is ensured.

3. The two stretching arms are stretched in parallel, so that the stretched tissue is stretched out of the cavity in parallel, the incision can be prevented from being pulled too much, and the operation of preventing the far-end opening from being too small can be avoided;

4. the utility model can extend the spreader into the mammary gland, and avoids the problem that the opening is too large due to the fact that the spreader is only pulled at the incision.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of a knife edge dilator according to a preferred embodiment of the present utility model in a closed state;

fig. 2 is a schematic view of a knife edge dilator according to a preferred embodiment of the present utility model in an open state.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2, a knife edge expander is characterized by comprising an opening mechanism 2 and an opening 1 which can be opened and closed, wherein the opening 1 is opened and closed by the opening mechanism 2;

the spreader opening 1 comprises two spreader arms 101.

The opening mechanism 2 comprises two first support rods 208, two second support rods 210, a sliding block 202 and a sliding rail 207, wherein the sliding block 202 is arranged on the sliding rail 207 in a sliding manner. In this embodiment, the sliding rail 207 is a guide rod structure, and the sliding block 202 is sleeved on the sliding rail 207. The front ends of the two supporting arms 101 are respectively hinged to the sliding rail 207 through a first supporting rod 208, and the rear ends of the two supporting arms 101 are respectively hinged to the sliding block 202 through a second supporting rod 210. Specifically, a hinge fixing block 209 is fixed at the front end of the sliding rail 207, and one ends of the two first support rods 208 are both hinged with the hinge fixing block 209; the other ends of the two first support rods 208 are respectively hinged to the front ends of the two supporting arms 101. One end of the second support bar 210 is hinged to the rear end of the corresponding spreader arm 101, and the other end of the second support bar 210 is hinged to the slider 202. When the two spreader arms 101 are closed together, the spreader opening 1 is closed, please refer to fig. 1; pushing the slider 202 in the rear direction along the front end of the sliding rail 207, the two folded opening arms 101 are separated, and the opening 1 is opened, please refer to fig. 2; pushing the slider 202 in the forward direction along the rear end of the slide rail 207 closes the two separate spreader arms 101, the spreader opening 1 being closed.

The lengths of the first support bar 208 and the second support bar 210 are not particularly required, and the size and the angle of the opening 1 can be set according to the requirement. When the slider 202 is pushed to open the two opening arms 101, the two opening arms 101 are opened at a certain angle, i.e. the opening of the opening 1 is opened at a certain angle. For another example, the two stretching arms 101 are arranged in parallel, and when the stretching opening 1 is opened to the required width, the two stretching arms 101 are still parallel.

In order to be able to lock the open or/and closed state of the stay opening 1, the knife edge expander therefore also comprises a locking mechanism comprising a fixed part and a movable part, the fixed part being fixed on the sliding rail 207, the fixed part comprising a number of first teeth 203; the movable part is fixed on the sliding block 202 and comprises a plurality of second teeth 204 which are matched with the first teeth 203; when the first teeth 203 are engaged with the second teeth 204, the opening 1 is locked.

In this example, the first teeth 203 and the second teeth 204 are respectively distributed on a straight line along the moving direction of the slider 202, that is, the first teeth 203 form a first rack and the second teeth 204 form a second rack.

The first teeth 203 and the second teeth 204 are unidirectional teeth, and the inclination angle of the first teeth 203 is different from and complementary to the inclination angle of the second teeth 204. In this example, the first tooth 203 and the second tooth 204 are inclined outward along the front end to the rear end of the slide rail 207.

When the stay opening 1 is in the closed state (the two stay arms 101 are in the closed state), the first teeth 203 at the rear end are engaged with the second teeth 204 at the front end, and the first teeth 203 at the front end are staggered from the second teeth 204 at the rear end. The sliding block 202 is pushed along the front end of the sliding rail 207 in the backward direction, the two folded opening arms 101 are separated, and when the opening 1 is opened to the required opening width, the sliding block 202 is stopped to be pushed, so that the first tooth 203 is engaged with the second tooth 204, and the sliding block is completely engaged (as shown in fig. 2) or partially engaged, which is not a specific requirement in the embodiment.

In this embodiment, the fixing portion further includes a vertical rod 206 and a parallel rod 205, the vertical rod 206 is fixedly connected with the parallel rod 205 and is L-shaped, the vertical rod 206 is perpendicular to the sliding rail 207 and is fixedly connected with the parallel rod 205 and is parallel to the sliding rail 207, and the plurality of first teeth 203 are fixed on a side surface of the parallel rod 205 facing the sliding rail 207. In this embodiment, the side of the parallel rod 205 facing the slide rail 207 is planar.

In this embodiment, the slider 202 is further provided with a pushing portion 201 for pushing by an operator, and the pushing portion 201 is provided with anti-slip patterns.

The incision expander provided by the utility model can be suitable for incision expansion of various operations, such as breast tumor excision operation, and when in operation, the skin incision is expanded through the expander, and then the knife is stretched into the incision for stripping.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The knife edge expander is characterized by comprising an expanding mechanism and an expanding opening which can be opened and closed through the expanding mechanism;

the opening comprises two opening arms; the expanding mechanism comprises at least two first supporting rods, at least two second supporting rods, a sliding block and a sliding rail, wherein the sliding block is arranged on the sliding rail in a sliding manner, the front ends of the two expanding arms are respectively hinged with the sliding rail through one first supporting rod, and the rear ends of the two expanding arms are respectively hinged with the sliding block through one second supporting rod; pushing the sliding block, and opening or closing the opening.

2. The knife edge expander of claim 1, wherein two of the spreader arms are disposed in parallel.

3. The knife edge expander according to claim 1, wherein the opening mechanism further comprises a hinged fixed block, the hinged fixed block is fixed at the front end of the sliding rail, and one end of each of the two first supporting rods is hinged with the hinged fixed block; the other ends of the two first support rods are respectively hinged with the front ends of the two supporting arms.

4. The knife edge expander of claim 3, wherein one end of the second support bar is hinged to the rear end of the corresponding spreader arm, and the other end of the second support bar is hinged to the slider.

5. The knife edge expander of claim 1, further comprising a locking mechanism comprising a fixed portion and a movable portion, the fixed portion being fixed on the slide rail, the fixed portion comprising a plurality of first teeth; the movable part is fixed on the sliding block and comprises a plurality of second teeth which are matched with the first teeth; the first tooth is engaged with the second tooth to lock the stay opening.

6. The knife edge expander of claim 5, wherein the first tooth and the second tooth are unidirectional teeth, and wherein the angle of inclination of the first tooth is different and complementary to the angle of inclination of the second tooth.

7. The knife edge expander according to claim 5, wherein the fixing portion further comprises a vertical rod and a parallel rod, the vertical rod is fixedly connected with the parallel rod in an L shape, the vertical rod is perpendicular to the sliding rail and fixedly connected with the sliding rail, the parallel rod is arranged in parallel with the sliding rail, and a plurality of first teeth are fixed on the side face, facing the sliding rail, of the parallel rod.

8. The knife edge expander according to claim 1, wherein a pushing part for pushing by an operator is further fixedly arranged on the sliding block.

9. The knife edge expander according to claim 8 wherein the pushing portion is provided with anti-slip threads.

10. The knife edge expander of any one of claims 1 to 9, adapted for use in breast tumour resection surgery.