CN114522310A

CN114522310A - Visual device

Info

Publication number: CN114522310A
Application number: CN202210138263.3A
Authority: CN
Inventors: 薛富善; 姚尚龙; 左明章; 黑子清; 王卫东; 夏帮凑; 熊雪锐; 李宏博; 王桃红
Original assignee: Zhejiang Youyi Medical Equipment Co ltd
Current assignee: Zhejiang Youyi Medical Equipment Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2022-05-24
Also published as: CN110694156B; CN110694156A

Abstract

The invention provides a visualizer, which comprises: the camera shooting assembly images through an observation window of the visual medical instrument; the connecting wire extends from the near end to the far end, and the far end of the connecting wire is connected with the camera shooting assembly; the handle is connected with the connecting wire and is provided with at least one limiting part; the handle controls the camera shooting assembly to be matched in the visible cavity in a pluggable manner through the connecting wire so that the camera shooting assembly can reach the observation window at the far end of the visible cavity; and when the camera shooting assembly is inserted in the visible cavity, the limiting part is matched with the limiting matching part of the visible cavity so as to prevent the camera shooting assembly from axially displacing and radially displacing in the visible cavity.

Description

Visual device

Technical Field

The invention belongs to the field of visual medical instruments, and particularly relates to a visual device.

Background

The visual medical instrument realizes the visual function of the laryngeal mask medical instrument by matching the endoscope with the medical instrument, and the endoscope needs to be held by hands during matching to ensure that a camera at the front end of the endoscope is closely attached to a laryngeal mask observation window all the time, thereby ensuring the stability of an image; for example, a visual laryngeal mask is provided with a visual cavity, the far end of the visual cavity forms an observation window, the near end of the visual cavity forms an insertion opening, when the visual laryngeal mask is used, an endoscope needs to be inserted into the visual cavity, however, the whole visual process needs a doctor to hold the endoscope, and the operation is inconvenient; and the endoscope is easy to shift, and the visual process is unstable.

Disclosure of Invention

In view of the above technical problems, the present invention provides a visual device, which is characterized in that the visual device comprises

The camera shooting assembly images through an observation window of the visual medical instrument;

the connecting wire extends from the near end to the far end, and the far end of the connecting wire is connected with the camera shooting assembly;

the handle is connected with the connecting wire, and the handle control connecting wire and the camera shooting assembly are matched in a visual cavity formed by the visual medical instrument in a pluggable manner so that the camera shooting assembly can reach an observation window at the far end of the visual cavity;

and the limiting structure is matched with the handle and used for limiting the free movement of the camera shooting assembly in the visual cavity.

Preferably, the handle comprises an operation part and a connecting part connected with the operation part, the connecting part is connected with the connecting wire, and the operation part drives the camera shooting assembly to be plugged in and out of the visual cavity through the connecting part.

Preferably, the visual device is configured to be in interference fit with the visual cavity.

Preferably, the limit structure includes:

the handle controls the limiting part to be in limiting fit with a limiting fit part formed in the visual cavity or to be released from the limiting fit.

Preferably, the limiting part is provided with a first position in limiting fit with the limiting matching part and a second position for releasing the limiting fit with the limiting matching part, and when the limiting part is located at the second position, the camera shooting assembly can be pulled out of the visual cavity;

the handle is provided with an elastic piece which has a supporting state and a compressed state; when the elastic piece is in a compressed state, the limiting part releases the limiting fit with the limiting fit part; when the elastic piece is in a supporting state, the limiting part is in limiting fit with the limiting matching part; when the elastic piece is converted from the compression state to the support state, the elastic piece applies acting force moving towards the first position to the limiting part, so that the limiting part is in limiting fit with the limiting fit part formed in the visual cavity.

Preferably, the operating part is provided with an acting surface matched with the visual medical instrument, the elastic piece is telescopically arranged on the acting surface, and the limiting part responds to the telescopic stroke of the elastic piece to enable the elastic piece to be switched between the first position and the second position.

Preferably, the limiting part is at least one limiting protrusion arranged on the connecting part, the limiting protrusion moves between a guide groove formed in the visual cavity and the clamping groove, and the limiting protrusion can be in limiting fit with the clamping groove in the axial direction and the radial direction.

Preferably, the operating portion is disposed perpendicular to the connecting line, and the connecting portion is disposed along an extending direction of the connecting line;

one side of the operation part, which is matched with the visual medical instrument, is sunken towards the inner side to form an action surface (511) of an arc surface, when the action surface rotates towards the visual medical instrument, the elastic piece retreats to be in a compressed state, and the limiting protrusion can be separated from the guide groove of the visual cavity;

when the acting surface faces away from the visual medical instrument to rotate, the elastic piece stretches out to be in a supporting state, and the limiting protrusion is in limiting fit with the clamping groove.

Preferably, the connecting wire at least comprises a wire, one end of the wire is connected with the camera, the other end of the wire penetrates through the handle to form a connecting end, and the connecting end is connected with a data connector; the guide wire has an insertion section for insertion into the visualization cavity, the insertion section being wrapped with a tube.

Preferably, the handle is made of a metal material, the elastic element is a marble telescopically arranged on the handle, and the marble can extend out of the outer side of the handle or retract into the inner side of the handle.

The visual device provided by the invention is simple and convenient to operate, and can be automatically locked only by inserting the handle of the visual device into the corresponding socket, so that the stability of an image is ensured; when the laryngeal mask is taken out, the tail end of the handle is held, the handle is rotated, and the handle can be automatically ejected out of the notch due to the flexibility of the insertion section of the visible device in the laryngeal mask.

Drawings

FIG. 1 is a schematic view of a visual medical device (laryngeal mask) provided by the present invention;

FIG. 2 is a schematic structural view of a visual medical device (laryngeal mask) and a visual device provided by the present invention;

FIG. 3 is a schematic structural diagram of a first visual device provided by the present invention;

FIG. 4 is a schematic structural diagram of a second visual device provided in the present invention;

fig. 5-8 are schematic structural views of a third visual device provided by the present invention.

Detailed Description

The invention or the technical scheme of the invention is further specifically described by the specific embodiment and the accompanying drawings of the specification;

in the description of the present invention, "at least one" means more than one unless specifically defined otherwise.

In the description of the present invention, it is to be understood that the terms "proximal", "distal", "top", "inner", "outer", "upper" and "lower", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention; in this application, proximal end should be interpreted as the part closer to the operator (doctor), while distal end should be interpreted as the part further away from the doctor.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted" and "connected" should be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Embodiments of the present invention provide a laryngeal mask assembly, as shown in figures 1 and 2, comprising:

a laryngeal mask 1, the laryngeal mask 1 forming a visual cavity 13 along the longitudinal extension direction thereof, the distal end of the visual cavity 13 forming a viewing window 131 and the proximal end thereof forming a socket 132; in the prior art, a user inserts an endoscope into a visible cavity through the insertion opening 132, an imaging device of the endoscope, such as a camera, reaches the observation window 131, the front end of the camera is tightly attached to the observation window 131, and a clear image is displayed on a corresponding screen (display); in the whole treatment process, a specially-assigned person is required to hold the endoscope, so that the efficiency is low, and the inconvenience is caused; the phenomenon that the endoscope is displaced in the visible cavity is easily caused by handheld operation, namely the phenomenon that the endoscope is difficult to be stably fixed in the visible cavity, and images on a screen are unstable or lost is caused;

referring to figures 1 and 2, the laryngeal mask 1 comprises a laryngeal mask body 11 and an airway adapter 12 connected to the laryngeal mask body 11, it being understood that the airway adapter 12 has an airway tube 121 and a connecting tube 122 disposed adjacent the airway tube 121, the airway tube 121 being inserted into an airway cavity of the laryngeal mask body; the connecting tube 122 is inserted into the visual passage of the laryngeal mask body to form a part of the visual cavity; the vent pipe 121 has an outer wall 121A with a cambered surface; it will be appreciated that the ventilation fitting is part of a laryngeal mask which is removably located on the body of the laryngeal mask;

in view of the above, the laryngeal mask assembly provided by the present invention further comprises a visualizer, referring to fig. 2, the visualizer comprising:

the camera shooting assembly 3 images through an observation window of the visual medical instrument; optionally, the camera assembly at least comprises a camera and an LED lamp arranged adjacent to the camera;

a connecting wire 2, as shown in fig. 2, extending from the proximal end to the distal end, and the distal end of the connecting wire is connected to the camera module; the embodiment provides that the connecting wire at least comprises a conducting wire and a pipe fitting wrapping the conducting wire, it can be understood that the distal end of the conducting wire is electrically connected with the camera shooting assembly, and the conducting wire extends towards the proximal end for being connected with a display device such as a display, so that the camera shooting assembly outputs the acquired image to the display device for displaying;

the handle 5 is connected with the connecting wire, the connection can be direct connection or can be generated through other connecting pieces, and the handle is used for controlling the stroke of the connecting wire; the handle 5 controls the connecting wire 2 and the camera component 3 to be matched in the visual cavity 13 in a pluggable manner, so that the camera component can reach the observation window 131 at the far end of the visual cavity; therefore, the camera shooting assembly is inserted into the visual cavity or separated from the visual cavity by the handle acting on the connecting wire, so that the operation of a user is facilitated;

the limiting structure is matched with the handle 5 and used for limiting the free movement of the camera shooting assembly in the visual cavity; the free movement refers to the movement of the connecting wire and the camera shooting assembly in the axial and/or radial direction in the visual cavity, and the axial movement refers to the movement of the connecting wire and the camera shooting assembly towards the direction of the visual cavity socket; the radial movement means that the connecting line and the camera module can generate radial displacement, for example, the connecting line and the camera module can rotate in a visible cavity, and the radial displacement and the axial displacement can both influence the fixation of the camera module in the visible cavity, so that the camera module has the defect of unstable imaging or incapability of imaging; the limiting structure provided by the invention can limit the free movement of the camera shooting assembly in the visual cavity, so that the visual device is fixed in the visual cavity; in some embodiments of the invention, the limiting structure at least limits the displacement of the camera assembly in the axial direction; in other embodiments of the present invention, the limiting structure at least limits the displacement of the camera assembly in the radial direction; in some preferred embodiments of the present invention, the limiting structure limits the displacement of the camera assembly in the axial direction and the radial direction;

the limiting structure provided by the invention can be realized through various structural forms, including but not limited to interference fit, limiting fit, snap fit, locking fit and the like;

in some embodiments of the present invention, referring to fig. 3, the visual device is in interference fit with the visual cavity, specifically, the handle 5 has an operation portion 51 and a connection portion 52 connected to the operation portion, the handle 5 is fixedly connected to a connection line (not shown) through a metal connection member 51, the visual cavity adopts a flexible member, the metal connection member is in interference fit with the visual cavity, the operation portion 51 is clamped above the socket 132, so that the visual device is prevented from being removed from the visual cavity by the extrusion force through the plastic deformation by metal extrusion, as shown in the figure, the cylindrical block at the lower end of the handle extrudes the inner wall of the hole of the joint, and the extrusion force makes the visual device not easily removed from the visual cavity without external force; however, in the actual use process of the laryngeal mask, after the visual device is inserted into the visual channel and the handle and the joint are matched in place, when a doctor accidentally touches the handle of the visual device, the visual device still can be separated from the visual device, and when the handle is stressed by horizontal force or vertical upward force, the matched part is easily separated;

in other embodiments of the present invention, referring to fig. 4, the limiting structure includes a limiting portion 61, the limiting portion 61 is disposed on the handle 5, a limiting matching portion 62 is formed in the visible cavity, the handle controls the limiting portion to be in limiting matching with the limiting matching portion or to be out of limiting matching, and when the limiting portion is out of limiting matching with the limiting matching portion, the connecting wire and the camera module can be moved out of the visible cavity; the connecting line and the camera shooting component can be matched in the visible cavity in a pluggable manner by controlling the position of the limiting part through the handle; in an embodiment, as shown in fig. 4, the limiting portion 61 includes at least one limiting protrusion, and correspondingly, the limiting engagement portion 62 includes at least one limiting notch, and when the limiting protrusion extends into the limiting notch, the handle is prevented from being rotated and ejected due to a horizontal force, and the ejection condition is improved; however, the situation that the visual device pops out when the visual device is subjected to a vertical upward force still can occur;

in some more preferred embodiments of the present invention, considering that the visual device is preferably prevented from being displaced in the axial direction and the radial direction when being inserted and fixed in the visual cavity, the position-limiting part 61 and the position-limiting matching part 62 provided by the present invention are preferably in position-limiting matching in both the axial direction and the radial direction; the handle control limiting part is provided with a first position which is in limiting fit with a limiting matching part formed in the visible cavity and a second position which is released from the limiting fit with the limiting matching part, and when the limiting part is positioned at the second position, the camera shooting assembly can be pulled out of the visible cavity; in some embodiments, referring to fig. 5 and 6, a limiting protrusion is formed on the connecting portion, and the limiting protrusion 61 has a first limiting surface 611 and a second limiting surface 612; a limiting matching part is formed at the socket of the visual cavity towards the lower side of the visual cavity, the limiting matching part is provided with a guide groove 621 and a clamping groove 622 communicated with the guide groove 621, the clamping groove 622 is provided with a limiting top and a limiting side wall, the handle controls the limiting part to move between the guide groove and the clamping groove, when the limiting part is clamped into the clamping groove, the limiting top is in limiting matching with a first limiting surface, and the second limiting surface is in limiting matching with the limiting side wall; when the limiting part moves from the clamping groove to the guide groove, the guide groove allows the limiting part to be separated from the guide groove; therefore, the limiting part and the limiting matching part are in limiting matching in the axial direction and the radial direction; the limit protrusions and the limit matching parts provided by the invention can be arranged into multiple groups, are not limited to one group, and are all covered in the protection scope of the invention.

In view of the convenience of the user, such as a doctor, the handle 5 is preferably provided with an automatic reset member to enable the stopper portion to be automatically reset to the locked state; in one embodiment of the invention, as shown in fig. 7, an elastic member 7 is arranged between the handle and the laryngeal mask, and the handle 5 and the elastic member 7 are matched to have a supporting state and a compressed state; when the elastic member 7 is in a compressed state, referring to fig. 6, the stopper portion 61 releases the stopper engagement with the stopper engagement portion 62; when the elastic piece is in a supporting state, the limiting part is in limiting fit with the limiting matching part; when the elastic member is changed from a compressed state to a supporting state (i.e., a release state), the elastic member applies an acting force to the limiting portion 61, the acting force moves towards the first position (the limiting portion extends into the guide groove), so that the limiting portion is in limiting fit with the limiting and matching portion, and thus, the handle is configured into an elastic handle through the arrangement of the elastic member, and the limiting fit or the releasing of the limiting fit of the limiting portion and the limiting and matching portion can be realized by pushing and pressing the handle to control the expansion and contraction of the elastic member; in particular, in the present embodiment, the handle cooperates with the elastic member so that the handle can rotate; the handle rotates to drive the limiting part to rotate between the guide groove and the clamping groove, so that the visual device and the limiting part are in limiting fit in the axial direction and the radial direction and the operation of a user is facilitated, and the user can pull out the visual device by pushing the handle; when a user pushes the handle to slide the connecting wire and the camera shooting assembly into the visible cavity, the limiting matching part slides into the guide groove, the handle is loosened, and the limiting matching part is pushed to the clamping groove; the use is quick and convenient, and the camera shooting assembly can be fixed in the visual cavity.

Optionally, the handle 5 includes an operation portion 51 and a connection portion 52 connected to the operation portion 51, the connection portion is connected to the connection line, when the connection portion and the connection line are inserted into the visible cavity, the operation portion abuts against the socket of the visible cavity, and the limiting portion is disposed on the connection portion; as shown in fig. 7, the operation part 51 has an action surface 511, the laryngeal mask has a matching surface 121A matched with the action surface 511, and the elastic member 7 is telescopically arranged between the action surface 511 and the matching surface 121A; the limiting part 61 responds to the telescopic stroke of the elastic part 7 so as to switch between the guide groove and the clamping groove.

In this embodiment, referring to fig. 8, the elastic member is a ball telescopically disposed on the action surface of the operation portion, and the ball has a cylindrical telescopic head and a spring connected to the telescopic head; the marble can extend out of the handle or retract into the inner side of the handle; the handle rotates relative to the laryngeal mask through the marble, and then the limiting protrusion is driven to move between the guide groove and the clamping groove; specifically, a mounting cavity is formed in the operation part, a marble is mounted in the mounting cavity towards the action surface, the marble extends out or retracts relative to the action surface, when the marble extends out, the marble extends out of the mounting cavity and abuts against the matching surface of the laryngeal mask, and the visual device is fixed in the visual cavity; when the installation cavity is retracted, the marble abuts against the matching surface of the laryngeal mask and retracts into the installation cavity, and the camera shooting assembly can pop out of the visual cavity.

In some embodiments of the present invention, the handle 5 includes an operation portion 51 and a connection portion 52 connected to the operation portion 51, one end of the connection portion 52 is disposed on the operation portion 51 and the other end thereof is connected to a connection line; the operation part 51 is arranged perpendicular to the connecting line 2, and the connection part 52 is arranged along the extending direction of the connecting line 2;

specifically, the connecting wire at least comprises a wire, one end of the wire is connected with the camera, the other end of the wire penetrates through the handle to form a connecting end, and the connecting end is connected with a data connector, such as a USB plug; optionally, the guide wire has an insertion section for insertion into the visualization cavity, the insertion section being wrapped with a tube; in this embodiment, the connecting portion is fixedly connected to the upper end of the pipe; the pipe fitting comprises a metal pipe fitting for wrapping the conducting wire and a heat-shrinkable pipe fitting for wrapping the metal pipe fitting; the extending lengths of the connecting part and the connecting line are equivalent to the extending length of the visual cavity, so that the camera shooting component can reach the observation window of the visual cavity; optionally, the connecting portion and the connecting line are integrally formed into an extension having a distal flexible section adapted to mate with the arcuate section of the visualization lumen and a proximal rigid section adapted to mate with the vertical section of the visualization lumen; the rigid section can better transmit the insertion force to the front end flexible section, so that the insertion is convenient and the bending of the extension section in the visual cavity is avoided; the lower surface of the operation part 51 is clamped at the upper end of the socket, so that the operation part 51 controls the connection part, the connecting line and the visual cavity to be in limit fit;

specifically, the laryngeal mask 1 comprises a laryngeal mask body 11 and an air connector 12 connected with the laryngeal mask body 11, and it can be understood that the air connector 12 is provided with an air duct 121 and a connecting pipe 122 arranged adjacent to the air duct 121, and the connecting pipe 122 is communicated with a visual channel of the laryngeal mask body to form a visual cavity; the vent pipe 121 has an outer wall 121A with a cambered surface; as shown in fig. 7, in the present embodiment, the operating portion is recessed inward in the direction of the laryngeal mask body airway tube to form a cambered surface acting surface, the acting surface is in contact with the outer wall of the airway tube, and the elastic member is telescopically disposed between the acting surface and the cambered surface outer wall; the action surface rotates towards the outer wall of the ventilation pipeline, the elastic piece retracts to enable the elastic piece to be in a compressed state, the action surface is released from positioning fit with the outer wall of the ventilation pipeline, and the limiting part can be separated from the limiting fit part of the visual cavity; the action surface deviates from the outer wall of the ventilation pipeline and rotates, the elastic piece extends out to enable the action surface to be in a supporting state, the action surface is in positioning fit with the outer wall of the ventilation pipeline, and the limiting part is in limiting fit with the limiting fit part; the positioning fit here means that the handle and the laryngeal mask body are in a relatively fixed fit relation.

In addition, the upper end of the ventilation pipeline of the ventilation joint is connected with the breathing joint, and due to the existence of the breathing joint, the edge of the breathing joint is above the insertion hole of the visual device, so that the handle of the visual device has to turn right-angled and bypass the edge, therefore, the handle provided by the embodiment comprises an operation part and a connecting part, one end of the connecting part is arranged on the operation part, and the other end of the connecting part is connected with the connecting line; the operating part is arranged perpendicular to the connecting line, and the connecting part is arranged along the extending direction of the connecting line; furthermore, the height of the operating part is limited, and the extending height of the operating part cannot exceed the breathing joint because the operating part cannot obstruct the use of the breathing joint, in the embodiment, the axial distance H between the bottom side edge of the breathing joint and the socket of the visual device is 12 mm; therefore, the extension height of the operation part is less than or equal to 12mm, and the height of the visual device is required to be less than 8mm in order to ensure that the visual device can be smoothly plugged and pulled without influencing the breathing joint; preferably less than 6 mm.

The direction of the handle provided by the invention is changed from the original horizontal direction to the right direction to the vertical direction, so that the probability of touching by the hand can be reduced in the pen holding method;

illustratively, the invention provides an explanation of the operation of the visualizer: and (3) carrying out embedding operation: the left hand holds the laryngeal mask, the right hand holds the visual device, the tail end of a handle of the visual device is ensured to be positioned close to a human body, an insertion section of the visual device is inserted into a visual cavity of the laryngeal mask, when the handle of the visual device touches a laryngeal mask joint, the handle of the visual device needs to be left close to the outer wall of an airway of the laryngeal mask, so that the small marbles are in a compressed state, then the small marbles are inserted along the visual cavity and a limiting notch, when the lower surface of an operation part is abutted to a socket of the visual cavity, the handle can be released, and the small marbles can automatically rotate to the right and are locked under the action of the small marbles; taking out operation: the tail end of the handle is pushed leftwards, and the handle can be taken out upwards after the handle rib touches the left wall of the joint gap.

It can be understood that the visualizer provided by the invention is not only suitable for the visual laryngeal mask, but also suitable for other visual medical instruments.

In the description herein, references to the description of the terms "some embodiments," "examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A viewer, the viewer comprising:

the camera shooting assembly (3) images through an observation window of the visual medical instrument;

the connecting wire (2) extends from the near end to the far end, and the far end of the connecting wire (2) is connected with the camera shooting assembly (3);

the handle (5), the said handle (5) is connected with connecting wire (2), the said handle (5) controls connecting wire (2) and makes a video recording assembly (3) cooperate in visual cavity (13) that the visible medical instrument forms in a pluggable way, so as to make the assembly (3) of making a video recording reach the observation window (131) of the distal end of visual cavity;

2. The visual device according to claim 1, wherein the handle (5) comprises an operation portion (51) and a connecting portion (52) connected with the operation portion (51), the connecting portion (52) is connected with the connecting wire (2), and the operation portion (51) drives the camera assembly to be inserted into and pulled out of the visual cavity through the connecting portion (52).

3. The visualizer of claim 1, wherein the visualizer is configured as an interference fit with a visualization cavity.

4. The visualizer of claim 2, wherein said limiting structure comprises:

the limiting part (61) is connected with the handle (5), and the handle (5) controls the limiting part to be in limiting fit with a limiting fit part (62) formed in the visual cavity or to be released from the limiting fit.

5. The viewer of claim 4, wherein the position-limiting portion has a first position in which the position-limiting engagement portion is in position-limiting engagement with the position-limiting engagement portion and a second position in which the position-limiting engagement with the position-limiting engagement portion is released, and when the position-limiting portion is in the second position, the image capturing assembly can be pulled out of the viewing cavity;

an elastic piece (7) is supported and arranged between the handle and the visual medical instrument, and the elastic piece has a supporting state and a compressed state; when the elastic piece is in a compressed state, the limiting part releases the limiting fit with the limiting fit part; when the elastic piece is in a supporting state, the limiting part is in limiting fit with the limiting matching part; when the elastic piece is converted from the compression state to the support state, the elastic piece applies acting force moving towards the first position to the limiting part, so that the limiting part is in limiting fit with the limiting fit part formed in the visual cavity.

6. A viewer according to claim 5,

the operation part is provided with an action surface matched with a visual medical instrument, the elastic piece is arranged on the action surface in a telescopic mode, and the limiting part responds to the telescopic stroke of the elastic piece to enable the elastic piece to be switched between a first position and a second position.

7. The device according to claim 5, wherein the limiting part is at least one limiting protrusion arranged on the connecting part, the limiting protrusion moves between a guide groove (621) formed in the visual cavity and a clamping groove (622), and when the limiting protrusion can be in limiting fit with the clamping groove in the axial direction and the radial direction.

8. A viewer according to claim 7,

the operating part is arranged perpendicular to the connecting line, and the connecting part is arranged along the extending direction of the connecting line;

9. The visualizer according to claim 1, wherein said connecting wire comprises at least a wire, one end of said wire is connected to a camera, and the other end of said wire penetrates said handle to form a connecting end, said connecting end is connected to a data connector; the guide wire has an insertion section for insertion into the visualization cavity, the insertion section being wrapped with a tube.

10. The viewer of claim 5, wherein the handle is made of a metal material, and the elastic member is a marble telescopically arranged on the handle, and the marble can extend to the outside of the handle or retract to the inside of the handle; when the handle rotates relative to the visual medical instrument, the limit bulge is driven to move between the guide groove and the clamping groove through the marble.