CN218484551U - Photoacoustic imaging system and laser device thereof - Google Patents

Abstract

A photoacoustic imaging system and a laser device thereof are provided, wherein the laser device comprises a shell, a light source and a light source, wherein the shell is provided with a connecting hole; the laser is arranged in the shell and used for emitting laser, and the connecting hole is positioned on a laser emitting light path of the laser; the plug socket is arranged on the outer side of the shell and provided with a plug hole, the plug hole is aligned with the connecting hole, and the plug hole is used for plugging an optical fiber plug; the light path blocking piece is movably arranged on the plug socket; when the optical fiber plug is pulled out, the light path blocking piece blocks and closes the plug-in hole; when the optical fiber plug is inserted, the optical fiber plug pushes the optical path barrier piece away to be inserted into the plug hole. Because the movable light path blocking piece is arranged in the laser device, when the optical fiber plug is pulled out, the light path blocking piece blocks and closes the plug hole, and when the optical fiber plug is inserted, the optical fiber plug blocks the plug hole; the plug hole is always in a blocking state, so that laser in the laser device can be prevented from leaking outwards, and safety of a user and a patient is guaranteed.

Description

Photoacoustic imaging system and laser device thereof

Technical Field

The utility model relates to an external detection device, concretely relates to optoacoustic imaging system and laser device thereof.

Background

The photoacoustic imaging system is a system for emitting laser to a human body and then recovering the laser to image the ultrasound generated by the human body, can image the inside of human tissues and can also be used for detecting human vital signs such as blood oxygen and the like.

The core component of the photoacoustic imaging system is a laser device, the laser device is used for emitting laser, and the laser device is connected with the probe through an optical fiber. Because laser device needs the different probes of adaptation, consequently be detachable plug connection between laser device and the optic fibre to conveniently change different probes and use, also make things convenient for simultaneously taking in alone of probe and optic fibre.

In the inspection of the existing photoacoustic imaging system, a user needs to manually start laser after inserting an optical fiber plug, the laser needs to be manually turned off before pulling out the optical fiber plug, the user needs to frequently change a probe and the optical fiber in operation, the laser needs to be frequently manually turned on and turned off, and if the user forgets to turn off the laser before changing, the laser can leak and has potential safety hazards.

SUMMERY OF THE UTILITY MODEL

In one embodiment, there is provided a laser apparatus of a photoacoustic imaging system, including:

a housing provided with a connection hole;

the laser is arranged in the shell and used for emitting laser, and the connecting hole is positioned on a light path of the laser emitted by the laser;

the plug socket is arranged on the outer side of the shell and provided with a plug hole, the plug hole is aligned with the connecting hole, and the plug hole is used for plugging an optical fiber plug; and

the optical path blocking piece is arranged on the plug socket; when the optical fiber plug is pulled out, the light path blocking piece blocks and closes the plug-in hole; when the optical fiber plug is inserted, the light path blocking piece avoids and opens the insertion hole.

In one embodiment, the light path blocking member is movably disposed on the socket.

In one embodiment, the optical path blocking member is rotatably disposed on the socket.

In one embodiment, the optical path blocking member is connected to a reset member, and when the optical fiber plug is pulled out, the reset member is used for driving the optical path blocking member to close the plug hole.

In one embodiment, the resetting member is a torsion spring, the light path blocking member is connected to the socket via a rotating shaft, the torsion spring is disposed on the rotating shaft, two blocking arms of the torsion spring are respectively abutted to the light path blocking member and the socket, and the torsion spring always applies a pressure to the light path blocking member to close the socket.

In one embodiment, the socket is provided with an accommodating space, the accommodating space is located between the plug hole and the laser, and the optical path barrier member is arranged in the accommodating space; when the optical fiber plug is pulled out, the light path blocking piece abuts against the end part of the plug hole and closes the plug hole.

In one embodiment, the optical path blocking member is a blocking plate, the plug socket is provided with a limiting portion, the limiting portion is located on a moving path of the blocking plate, and when the optical fiber plug is pulled out, the limiting portion blocks the blocking plate so that the blocking plate closes the plug hole.

In one embodiment, when the optical fiber plug is pulled out, the limiting part limits the baffle, and the baffle separates and closes the plug-in hole in a manner of inclining relative to the optical axis.

In one embodiment, the limiting part is an inclined surface which is inclined relative to the axial direction of the plug hole, the plug hole penetrates through the inclined surface, and when the optical fiber plug is pulled out, the baffle plate abuts against the inclined surface, so that the baffle plate closes the plug hole.

In one embodiment, the light path blocking member is disposed on the socket and is capable of moving radially relative to the insertion hole.

In one embodiment, the socket is provided with a mounting hole which is perpendicular to and communicated with the plug hole, the optical path barrier member is arranged in the mounting hole, the optical path barrier member is connected with a reset member, and when the optical fiber plug is pulled out, the reset member is used for driving one end of the optical path barrier member to be inserted into the plug hole to close the plug hole; or the like, or a combination thereof,

the optical path blocking piece is connected with a resetting piece, and when the optical fiber plug is pulled out, the resetting piece is used for driving one end of the optical path blocking piece to be inserted into the plug hole to close the plug hole.

In one embodiment, the optical path blocking member is a rod-shaped structure, the reset member is a straight spring, a first radial limiting portion is arranged in the middle of the blocking member, a second radial limiting portion is arranged on the socket, the first limiting portion is located between the socket and the second limiting portion, the straight spring is sleeved on the optical path blocking member, two ends of the straight spring are respectively connected with the first limiting portion and the second limiting portion, and the straight spring always applies a thrust force to the optical path blocking member to push the optical path blocking member to be inserted into the socket.

In one embodiment, one end of the light path barrier member, which is used for being inserted into the insertion hole, is provided with an inclined pushing surface; when the optical fiber plug is pulled out, the pushing surface is obliquely positioned in the plug hole relative to the optical axis and faces the direction of inserting the optical fiber plug; when the optical fiber plug is inserted, the optical fiber plug pushes the optical path barrier piece away against the pushing surface.

In one embodiment, a clamping piece is arranged in the plug hole and used for limiting the optical fiber plug in the plug hole.

In one embodiment, the clamping piece is a protruding structure capable of radially extending and retracting, and the protruding structure is used for clamping a clamping groove in the optical fiber plug.

In one embodiment, a light guide channel is arranged in the housing, the light guide channel comprises an incident end and an emergent end, the housing is provided with a connecting hole, the emergent end is aligned with the connecting hole, the emergent end is used for connecting an optical fiber plug, and the laser is connected with the incident end of the light guide channel.

In one embodiment, the laser apparatus further comprises: the device comprises a sensing part, a control part and a driving part;

the sensing piece is used for sensing and obtaining information that the optical fiber plug is close to or far away from the optical path barrier piece;

the control element comprises an output end and an input end, and the input end is connected with the sensing element and used for receiving the information obtained by the sensing element;

the driving piece is arranged on the plug socket and connected with the light path blocking piece and the output end of the control piece; the control piece controls the driving piece to drive the light path blocking piece to open or close the plug hole based on the information obtained by the input end.

In one embodiment, the driving member drives the optical path blocking member along a radial direction of the insertion hole:

the inserting hole is opened or closed by rotating, or,

and the inserting hole is opened or closed by translation.

In one embodiment, the driver comprises: a motor drive, a hydraulic drive, or a pneumatic drive.

In one embodiment, the sensor comprises: infrared sensors, microwave sensors or ultrasonic sensors.

In one embodiment, the optical path barrier member is made of a ceramic material.

In one embodiment, the optical path barrier member is made of a high temperature resistant deformable material.

In one embodiment, the optical path blocking member includes a first blocking member and a second blocking member, and the first blocking member and the second blocking member are disposed opposite to each other in a radial direction of the insertion hole and partially overlap each other in a region of a central axis of the optical fiber plug inserted into the insertion hole. In one embodiment, there is provided a laser apparatus of a photoacoustic imaging system, including:

the optical fiber connector comprises a shell, wherein the shell is provided with a connecting hole, and the connecting hole is used for inserting an optical fiber plug;

the laser is arranged in the shell and used for emitting laser, and the connecting hole is positioned on a light path of the laser emitted by the laser; and

the light path barrier piece is movably arranged in the shell; when the optical fiber plug is pulled out, the light path blocking piece blocks and closes the connecting hole; when the optical fiber plug is inserted, the optical fiber plug pushes the optical path barrier piece to be inserted into the connecting hole.

In one embodiment, the optical path blocking member is rotatably or radially movably disposed with respect to the connection hole.

In one embodiment, the optical path barrier member is connected to a reset member, and the reset member is configured to drive the optical path barrier member to close the connection hole when the optical fiber plug is pulled out.

In one embodiment, the reset member is a torsion spring.

In one embodiment, a photoacoustic imaging system is provided, which includes a probe, an optical fiber and the above laser device, wherein one end of the optical fiber is connected with the probe, and one end of the optical fiber, which is far away from the probe, is provided with an optical fiber plug, and the optical fiber plug is used for being detachably connected with the laser device; the optical fiber is used for transmitting the laser emitted by the laser device to the probe, and the probe is used for irradiating the laser to human tissues and recovering ultrasonic waves generated by the action of the laser on the human tissues.

According to the photoacoustic imaging system and the laser device thereof in the embodiment, the movable light path barrier piece is arranged in the laser device, when the optical fiber plug is pulled out, the light path barrier piece blocks and closes the plug hole, and when the optical fiber plug is inserted, the optical fiber plug blocks the plug hole; the plug hole is always in a blocking state, so that laser in the laser device can be prevented from leaking outwards, and safety of a user and a patient is guaranteed.

Drawings

FIG. 1 is a schematic diagram of a laser device of a photoacoustic imaging system in one embodiment;

FIG. 2 is an axial cross-sectional view of a laser apparatus of a photoacoustic imaging system in one embodiment;

FIG. 3 is an axial cross-sectional view of a laser apparatus of a photoacoustic imaging system in one embodiment;

FIG. 4 is an axial cross-sectional view of a laser apparatus of a photoacoustic imaging system in one embodiment;

FIG. 5 is an axial cross-sectional view of a laser apparatus of a photoacoustic imaging system in one embodiment;

FIG. 6 is a schematic diagram of a photoacoustic imaging system in one embodiment;

wherein the reference numbers are as follows:

1-shell, 11-connecting hole, 12-mounting block, 2-laser, 3-socket, 31-socket, 32-limiting part, 33-clamping part, 34-mounting hole, 4-optical path barrier part, 41-first limiting part, 42-second limiting part, 43-barrier surface, 5-resetting part, 6-rotating shaft and 7-optical fiber plug; 10-probe, 20-optical fiber, 30-laser device.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the described features, operations, or characteristics may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The ordinal numbers used herein for the components, such as "first," "second," etc., are used merely to distinguish between the objects described, and do not have any sequential or technical meaning. The term "connected" and "coupled" as used herein, unless otherwise specified, include both direct and indirect connections (couplings), and the optical axis refers to the central axis of the laser propagation path.

In one embodiment, a laser device of a photoacoustic imaging system is provided, the laser device is used for emitting laser, the laser emitted by the laser device is used for irradiating human tissues so as to enable the human tissues to generate ultrasonic waves, and the photoacoustic imaging system performs imaging by recycling the ultrasonic waves. In this embodiment, be equipped with leak protection light structure in the laser device to make the user at the in-process of frequent plug optical fiber plug 7, laser device can not leak laser outward, and then can avoid the loss to user or patient, has the safety guarantee.

Referring to fig. 1 and fig. 2, in the present embodiment, the laser device mainly includes a housing 1, a laser 2, a socket 3, and an optical path barrier member 4. The housing 1 has a receiving cavity, the laser 2 is installed in the receiving cavity of the housing 1, and the socket 3 and the light path barrier member 4 are installed outside the housing 1. And a controller and other components are also arranged in the laser device, and the controller is used for controlling the laser 2 to be started and stopped to emit laser.

The laser 2 is used for emitting laser, the laser 2 can be a single light source or multiple light sources, the single light source is used for emitting laser of one waveband, the multiple light sources are used for emitting laser of different wavebands, the multiple light sources can simultaneously emit laser of multiple different wavebands, and the laser of one waveband can be switched and independently emitted. The laser 2 adopts a single light source or a multi-light source structure, and can be arranged according to different use requirements, such as: so as to meet the requirements of carrying out ultrasonic imaging on different tissues or detecting different human body vital signs.

Be equipped with the light guide channel in the casing 1, the light guide channel can be the lens subassembly, also can be optic fibre, and the light guide channel is used for transmitting the laser of 2 launches of laser instrument. The light guide channel comprises an incident end and an emergent end, and the incident end of the light guide channel is connected with the laser 2. The incident end of the light guide channel can be directly butted with the laser 2, and the incident end of the light guide channel can also be connected with the laser 2 through adapters such as optical fibers. The light guide channel can be set to be a linear structure or a bent structure, and the arrangement of the light guide channel is favorable for the layout of parts in the shell 1 so as to realize the compactness and the miniaturization of the laser device. The upper side wall of the shell 1 is provided with a connecting hole 11, the emergent end of the light guide channel is aligned with the connecting hole 11, and the connecting hole 11 is used for being in butt joint with the plug socket 3.

In other embodiments, the housing 1 may not be provided with a light guide channel, the laser 2 is disposed near the connection hole 11, the connection hole 11 is located on a light path of the laser 2 emitting laser, the laser 2 can directly irradiate the emitted laser onto the optical fiber plug 7, and the laser 2 may not be disposed near the connection hole 11 as long as the laser 2 can directly irradiate the emitted laser onto the optical fiber plug 7.

Referring to fig. 1, fig. 2 and fig. 3, in the present embodiment, the plug socket 3 is installed on an outer side wall of the housing 1, the plug socket 3 has a plug hole 31, the plug hole 31 is aligned with the connection hole 11, for example, the plug hole 31 and the connection hole 11 on the housing 1 may be aligned on a same central line axially, and the plug hole 31 communicates with the connection hole 11, so that the optical fiber plug 7 can be inserted into the housing 1 to be connected with the exit end of the light guide channel. Plug socket 3 has axial inner terminal surface and outer terminal surface, and the inner of plug socket 3 supports and leans on the outer wall of casing 1, and the outer terminal surface of plug socket 3 is the terminal surface that faces away from casing 1, and spliced eye 31 extends to the inner terminal surface from the outer terminal surface of plug socket 3. The inner end face of the socket 3 can also be inserted into the housing 1 to be butted with the emergent end of the light guide channel, and the optical axis of the laser emitted from the emergent end of the light guide channel can be collinear with the central line of the plug hole 31.

When the detection device is used for detection, an optical fiber plug of the optical fiber is inserted into the plug hole 31, the end part of the optical fiber plug 7 is connected with the emergent end of the light guide channel, and the optical fiber is used for transmitting laser to the probe.

In this embodiment, the socket 3 may be formed by combining a plurality of components, and the inserting hole 31 is formed by splicing a plurality of components. In other embodiments, the socket 3 may be a unitary structure, or the socket 3 and the housing 1 may be a unitary structure.

In this embodiment, the optical path blocking member 4 is movably installed in the inserting seat 3, and the optical path blocking member 4 can be located at the inner end of the inserting hole 31 of the inserting seat 3. One side that plug seat 3 is close to casing 1 in this embodiment is equipped with the accommodation space, and the accommodation space is located the inner end of spliced eye 31, spliced eye 31 and accommodation space intercommunication, and light path separates to keep off 4 and is located this accommodation space, and light path separates to keep off 4 can move to separating the tip of keeping off spliced eye 31, and light path separates to keep off 4 can also move to dodging to open spliced eye 31. The optical path barrier member 4 is further connected with a reset member 5, and the reset member 5 always applies a driving force to the optical path barrier member 4, so that the optical path barrier member 4 blocks and closes the insertion hole 31 without other forces on the optical path barrier member 4.

The light path barrier member 4 blocks the closing plug-in hole 31, which is equivalent to closing the light guide channel, so that the laser in the light guide channel cannot irradiate the outside of the laser device; the movably mounted optical path barrier 4 can be pushed away by the inserted optical fiber plug 7, so that the plug hole 31 is opened, which is equivalent to opening the light guide channel, and the optical fiber plug 7 can be connected with the emergent end of the light guide channel.

In this embodiment, the light path blocking member 4 may be a blocking plate, one end of the light path blocking member 4 is rotatably connected to the plug socket 3 through the rotating shaft 6, the reset member 5 may be a torsion spring, the torsion spring is sleeved on the rotating shaft 6, and two blocking arms of the torsion spring are respectively abutted to the light path blocking member 4 and the plug socket 3, and the torsion spring always applies pressure to the light path blocking member 4, so that the light path blocking member 4 abuts against the plug socket 3, and blocks the plug hole 31.

In other embodiments, the optical path blocking member 4 may be a circular plate or an elliptical plate, the area of the optical path blocking member 4 is larger than the axial cross-sectional area of the insertion hole 31, the optical path blocking member 4 is installed in the insertion hole 31, a groove is formed in the insertion hole 31, one end of the optical path blocking member 4 has a protruding connection portion, the connection portion of the optical path blocking member 4 is installed in the groove of the insertion hole 31 through the rotating shaft 6, and the area of the groove is larger than or equal to the area of the optical path blocking member 4, so that the optical path blocking member 4 can be hidden in the groove. In this scheme, can drive light path barrier piece 4 through the torsional spring equally and keep off and close spliced eye 31, under the promotion of fiber optic plug 7, light path barrier piece 4 equally can overturn and dodge and open spliced eye 31, and then can avoid the laser to leak outward.

In other embodiments, in order to improve the dust resistance and wear resistance of the optical path barrier member 4, the laser device may open and close the insertion hole 31 by the optical fiber plug 7 and the optical path barrier member 4 in a non-contact manner. Specifically, the laser device of the photoacoustic imaging system may include: the device comprises a sensing part, a control part and a driving part. The sensing element and the control element can be arranged at any position of the laser device, the driving element is arranged on the plug socket 3 and is connected with the light path blocking element 4, the control element comprises an input end and an output end, the input end is connected with the sensing element and is used for receiving information obtained by the sensing element, and the output end is connected with the driving element and is used for controlling the driving element to drive the light path blocking element 4 to open or close the plug hole 31. The driving member drives the optical path barrier member to move in a manner of radial rotation or translation relative to the insertion hole 31. The specific working process is as follows: in the process that the optical fiber plug 7 is inserted into the plug hole 31, the sensor on the optical path barrier member 4 can be an infrared sensor, a microwave sensor or an ultrasonic sensor, and the like, when the sensor senses the information when the optical fiber plug 7 is inserted, corresponding pulses are transmitted to the control member, the control member informs the driving member to operate after judging, and the optical path barrier member 4 is automatically opened under the action of the driving member; similarly, in the process of pulling out the optical fiber plug 7, the sensor senses the information that the optical fiber plug 7 is far away, and the control part informs the driving part of reversely moving after judging, so that the light path barrier part 4 is closed. In the present embodiment, the light path barrier 4 may be a single barrier element, or may be two or more barrier elements arranged diametrically opposite to each other. For example, the first barrier member and the second barrier member may be disposed opposite to each other in the radial direction of the insertion hole 31; when the optical fiber plug is inserted into the plug hole 31, the first barrier member and the second barrier member move apart in the radial direction of the plug hole; when the optical fiber plug is pulled out of the plugging hole, the first blocking piece and the second blocking piece move oppositely along the radial direction of the plugging hole to be contacted and closed. The purpose of setting up the inductor on keeping off the piece is, and optic fibre plug can keep off the piece through non-contact's mode with the partition, directly realizes optic fibre plug's insertion and extraction, at a certain extent very big improvement keep off the wearability of piece.

In this embodiment, the working principle of the optical path barrier member 4 for preventing laser leakage is as follows:

when the optical fiber plug 7 is pulled out, the optical path blocking piece 4 is driven by the reset piece 5 (torsion spring), the optical path blocking piece 4 is overturned to abut against the inner end face of the plug-in hole 31, and the optical path blocking piece 4 blocks and closes the plug-in hole 31; at this time, the light guide channel is closed, and the laser transmitted by the light guide channel cannot be emitted out of the laser device from the plug hole 31, so that the damage to the human body caused by the laser leakage when the optical fiber plug 7 is pulled out can be avoided;

when the optical fiber plug 7 is inserted, in the process of inserting the optical fiber plug 7, the end part of the optical fiber plug 7 abuts against the optical path barrier member 4, and along with the continuous insertion of the optical fiber plug 7, the optical fiber plug 7 pushes the optical path barrier member 4 to rotate until the optical path barrier member 4 avoids the insertion hole 31; at this moment, the light guide channel is opened, the optical fiber plug 7 is continuously inserted and can be connected with the emergent end of the light guide channel, the optical fiber plug 7 can transmit the laser transmitted by the light guide channel to the probe, meanwhile, the plug hole 31 is plugged by the optical fiber plug 7, and then the laser can not leak out to hurt the human body when the optical fiber plug 7 is inserted.

In the present embodiment, the material of the optical path barrier member 4 is a ceramic material. In addition, the material of the optical path blocking member 4 may be other than ceramic, such as a deformable material resistant to high temperature.

As in one embodiment, the optical path barrier 4 may be made of a high temperature resistant deformable material, and the optical path barrier 4 may include two parts (not shown), specifically, a first barrier and a second barrier, which are disposed opposite to each other in the radial direction of the insertion hole 31, and prevent the optical fiber plug 7 from leaking laser light due to the deformation of the third barrier and the fourth barrier during the insertion process,

the first and second barriers can be fixedly connected to the radial connection of the insertion hole 31, and the first and second barriers can overlap partially in the central axis region of the insertion hole 31 into which the optical fiber plug 7 is inserted, so that laser leakage can be prevented better when the optical fiber plug 7 is inserted into the insertion hole 31.

In this embodiment, be equipped with spacing portion 32 on bayonet socket 3, spacing portion 32 is used for spacing light path to separate the fender state that keeps off piece 4, spacing portion 32 is used for spacing light path to separate to keep off piece 4 and is kept off the relative slope of being in opposite directions to the optical axis when closing plug-in hole 31, this incline direction is towards the direction that light path separates the piece 4 and is promoted, the light path separates the one end that keeps off piece 4 and keeps away from pivot 6 and compares the one end of connecting pivot 6 and be closer to the exit end of leaded light passageway promptly, so that when optic fibre plug 7 male in-process promotes light path and keeps off piece 4 and rotate, can reduce optic fibre plug 7 male thrust, user experience can be promoted.

In this embodiment, the limiting portion 32 may be an inclined surface of a component in the socket 3, the inserting hole 31 penetrates through the component, the inserting hole 31 penetrates through the inclined surface, the inclined surface is inclined with respect to the axial direction of the inserting hole 31, the optical path blocking member 4 abuts against the inclined surface when blocking, and the inclined surface limits the optical path blocking member 4 to an inclined state. By adopting the inclined plane, the light path barrier piece 4 can be completely attached to the plug-in hole 31, the sealing effect of the barrier is improved, and the laser leakage is prevented.

In other embodiments, the position-limiting portion 32 may also be a protruding structure mounted on the socket 3, and the protruding structure contacts with an end of the optical path barrier 4 away from the rotating shaft 6, and the protruding structure can also limit the optical path barrier 4 to an inclined barrier state, and the optical path barrier 4 can also play a certain barrier role.

The utility model provides an in the embodiment, still install joint spare 33 in the spliced eye 31, joint spare 33 can be protruding structures such as round pin axle, round pin axle and spring coupling, round pin axle can be relative spliced eye 31 radial flexible removal, be equipped with the draw-in groove that corresponds with joint spare 33 on the optical fiber plug 7, after the spliced eye 31 is inserted to optical fiber plug 7, joint spare 33 will block into in the draw-in groove of optical fiber plug 7, form spacing to optical fiber plug 7, can avoid deviating from of optical fiber plug 7, and joint spare 33 still is used for spacing optical fiber plug 7 male axial distance, so that optical fiber plug 7 can with the accurate butt joint of light guide channel's outgoing end, so as to avoid optical fiber plug 7 to insert too deeply or too shallowly, and then guarantee the stability of connecting.

In one embodiment, a laser apparatus of a photoacoustic imaging system is provided, and the present laser apparatus differs from the above embodiments in that: in this embodiment, the optical path blocking member 4 is configured to radially extend and contract with respect to the insertion hole 31, and the optical path blocking member 4 blocks the insertion hole 31 and avoids and opens the insertion hole 31 by radially extending and contracting.

Referring to fig. 4, in the present embodiment, the socket 3 is provided with a mounting hole 34, the mounting hole 34 is perpendicular to the inserting hole 31, the mounting hole 34 is communicated with the inserting hole 31 to form a T-shaped structure, and an end of the mounting hole 34 is communicated with a middle portion or a position near the middle portion of the inserting hole 31.

The optical path blocking piece 4 can be of a rod-shaped structure, the optical path blocking piece 4 is installed in the installation hole 34, the optical path blocking piece 4 can axially move in a telescopic mode along the installation hole 34, one end of the optical path blocking piece 4 can be inserted into the insertion hole 31 to block and close the insertion hole 31, and one end of the optical path blocking piece 4 can also exit the insertion hole 31 to avoid opening the insertion hole 31.

The reset member 5 may be a straight spring which is always in a compressed state, and the straight spring is sleeved on the optical path blocking member 4. The light path blocking piece 4 is provided with a first limiting portion 41 protruding in the radial direction, the socket 3 is provided with a second limiting portion 42, the second limiting portion 42 is provided with one end of the mounting hole 34 far away from the socket 31, the first limiting portion 41 and the second limiting portion 42 can be of annular structures, the outer diameter of the first limiting portion 41 is smaller than the inner diameter of the mounting hole 34, the inner diameter of the second limiting portion 42 is smaller than the outer diameter of the light path blocking piece 4, so that the first limiting portion 41 can move in the mounting hole 34, and one end of the light path blocking piece 4 far away from the socket 31 can penetrate out of the second limiting portion 42. The first limiting portion 41 is located between the insertion hole 31 and the second limiting portion 42, two ends of the straight spring are connected with the first limiting portion 41 and the second limiting portion 42 respectively, the straight spring is compressed between the first limiting portion 41 and the second limiting portion 42 all the time, and the straight spring provides the light path blocking member 4 with a thrust force for driving one end of the light path blocking member 4 to be inserted into the insertion hole 31 all the time.

Wherein, be equipped with spacing step in the mounting hole 34, spacing step is used for keeping off a grade first spacing portion 41 to make the stroke that light path keeps off piece 4 and inserts in spliced eye 31 limited by spacing step, in order to avoid light path to keep off the rigid contact of piece 4 and spliced eye 31, improve the flexible stability of light path keeps off piece 4.

The end of the light path blocking member 4 inserted into the insertion hole 31 has a blocking surface 43, the area of the blocking surface 43 is larger than or equal to the cross-sectional area of the insertion hole 31, and the blocking surface 43 is used for blocking and sealing the insertion hole 31.

In this embodiment, the blocking surface 43 may be an inclined surface, and when the optical fiber plug 7 pushes the optical path blocking member 4, the blocking surface 43 can provide a radial movement component force for the optical path blocking member 4, so that the optical fiber plug 7 can push the optical path blocking member 4 to move telescopically.

In this embodiment, when the optical fiber plug 7 is pulled out, the optical path blocking member 4 is driven by the straight spring, the blocking surface 43 of the optical path blocking member 4 blocks in the insertion hole 31, and the blocking closes the insertion hole 31; when the optical fiber plug 7 is inserted, the optical fiber plug 7 pushes the optical path barrier member 4 to move radially through the inclined surface, and avoids opening the insertion hole 31.

In one embodiment, a laser apparatus of a photoacoustic imaging system is provided, and the present laser apparatus differs from the above embodiments in that: not including the socket.

Referring to fig. 5, in the present embodiment, a mounting block 12 is disposed at a connection hole 11 of the housing 1, the connection hole 11 extends into the mounting hole 12, so that the connection hole 11 has a certain length, and the connection hole 11 is used for inserting the optical fiber plug 7. The optical path blocking member 4 is mounted on a bracket in the housing 1, or the optical path blocking member 4 is mounted on a mounting block 12 in the housing 1. The light path barrier 4 is located between the connection hole 11 and the exit end of the light guide channel. The connecting hole 11 is provided with an inner end and an outer end, and the light path barrier piece 4 is abutted against the inner end of the connecting hole 11 and can be used for closing the connecting hole 11; alternatively, the optical path block 4 is mounted on the exit end of the light guide channel. The light path barrier pieces 4 can close the light guide channel to avoid laser leakage.

In this embodiment, the optical path blocking member 4 opens and closes the connection hole 11 in a rotating manner, the optical path blocking member 4 may be a board-shaped structure, the optical path blocking member 4 is connected to a rotating shaft and connected to the mounting block 12, and the optical path blocking member 4 closes and opens the connection hole 11 in a rotating manner. Can set up the torsional spring in the pivot, two fender arms of torsional spring lean on with light path barrier piece 4 and installation piece 12 respectively and are connected, and the torsional spring provides the thrust that a closed connecting hole 11 for light path barrier piece 4 all the time.

In other embodiments, the optical path blocking member 4 opens and closes the connection hole 11 in a sliding manner, and the optical path blocking member 4 may have a rod-like structure. The mounting block 12 may be provided with a mounting hole perpendicular to the connection hole, and the optical path barrier member 4 is mounted in the mounting hole by a compression spring, which always provides the optical path barrier member 4 with a pressure for driving one end of the optical path barrier member 4 in the connection hole 11. In a sliding manner, the optical path barrier member 4 can also open and close the connection hole 11 to prevent the laser from leaking outside.

In this embodiment, the light path blocking member 4 is installed in the housing 1, so that the outer side of the laser device is more neat and beautiful, and the convex socket can be prevented from being damaged by collision during transportation.

In one embodiment, a photoacoustic imaging system is provided for generating ultrasound waves by laser excitation of human tissue and forming ultrasound images by recovering the ultrasound waves.

Referring to fig. 6, in the present embodiment, the photoacoustic imaging system mainly includes a probe 10, an optical fiber 20, and a laser device 30 in any of the above embodiments. The probe 10 may be a photoacoustic probe, the probe 10 is used for emitting laser light to human tissue and recovering ultrasonic waves, and the probe 10 may be divided into different probes according to the function and the structure. One end of the optical fiber 20 is fixedly connected or detachably connected with the probe 10, and the other end of the optical fiber 20 is provided with an optical fiber plug 7, and the optical fiber plug 7 is used for being plugged with the laser device 30. The laser emitted from the laser device 30 is transmitted to the probe 10 through the optical fiber 20, and the probe 10 irradiates the laser onto the human tissue.

In this embodiment, since the optical path barrier 4 is installed in the laser device 30, in the process of frequently plugging the optical fiber plug 7 of the optical fiber 20, it can be ensured that laser does not leak from the inside and outside of the laser device, and the safety of users and patients is ensured.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical personnel in the technical field of the utility model, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replace.

Claims (28)

1. A laser apparatus of a photoacoustic imaging system, comprising:

the optical fiber connector comprises a shell, wherein the shell is provided with a connecting hole which is used for connecting an optical fiber plug;

the laser device is arranged in the shell and used for emitting laser, and the connecting hole is positioned on a light path of the laser emitted by the laser device;

the plug socket is arranged on the outer side of the shell and provided with a plug hole, the plug hole is aligned with the connecting hole, and the plug hole is used for plugging an optical fiber plug; and

the optical path blocking piece is arranged on the plug socket; when the optical fiber plug is pulled out, the light path blocking piece blocks and closes the plug-in hole; when the optical fiber plug is inserted, the light path barrier piece avoids and opens the insertion hole.

2. The laser apparatus of photoacoustic imaging system of claim 1 wherein said optical path barrier member is movably disposed on said receptacle.

3. The laser apparatus of photoacoustic imaging system of claim 2 wherein the optical path barrier member is rotatably disposed on the socket.

4. The laser apparatus of photoacoustic imaging system of claim 3 wherein said optical path barrier member has a reset member attached thereto, said reset member being adapted to drive said optical path barrier member to close said insertion hole when the fiber optic plug is removed.

5. The laser device of photoacoustic imaging system of claim 4 wherein the reset member is a torsion spring, the light path barrier member is connected to the socket via a rotating shaft, the torsion spring is disposed on the rotating shaft, two arms of the torsion spring are respectively abutted to the light path barrier member and the socket, and the torsion spring always applies a pressure to the light path barrier member to close the socket.

6. The laser device of photoacoustic imaging system of claim 3 wherein said receptacle has a receiving space, said receiving space being located between said insertion hole and said housing, said light path barrier member being disposed in said receiving space; when the optical fiber plug is pulled out, the light path blocking piece abuts against the end part of the plug hole and closes the plug hole.

7. The laser device of photoacoustic imaging system of claim 6 wherein the light path barrier is a barrier, and the receptacle has a position-limiting portion, the position-limiting portion is located on the moving path of the barrier, and when the fiber plug is pulled out, the position-limiting portion blocks the barrier to make the barrier close the insertion hole.

8. The laser device of photoacoustic imaging system of claim 7 wherein said spacing portion is adapted to position said spacer when the fiber plug is removed, said spacer blocking said insertion hole in a manner inclined with respect to the optical axis.

9. The laser device of a photoacoustic imaging system of claim 8 wherein the stopper is an inclined surface that is inclined axially with respect to the insertion hole, and the insertion hole passes through the inclined surface, and when the optical fiber plug is pulled out, the shutter abuts against the inclined surface, so that the shutter closes the insertion hole.

10. The laser apparatus of photoacoustic imaging system of claim 1 wherein said optical path barrier member is mounted on said receptacle so as to be radially movable with respect to said receptacle.

11. The laser apparatus of photoacoustic imaging system of claim 10 wherein said receptacle has a mounting hole perpendicular to and in communication with said receptacle, said light path barrier member is disposed in said mounting hole, said light path barrier member is connected to a reset member, said reset member is used to drive one end of said light path barrier member to insert into said receptacle to close said receptacle when said fiber optic plug is pulled out; or the like, or, alternatively,

the optical path blocking piece is arranged in the mounting hole, the optical path blocking piece is connected with a resetting piece, and when the optical fiber plug is pulled out, the resetting piece is used for driving one end of the optical path blocking piece to be inserted into the insertion hole to close the insertion hole.

12. The laser device of photoacoustic imaging system of claim 11 wherein said light path barrier member is a rod-like structure, said reset member is a straight spring, said barrier member has a first radial position-limiting portion, said socket has a second radial position-limiting portion, said first position-limiting portion is located between said insertion hole and said second position-limiting portion, said straight spring is sleeved on said light path barrier member, two ends of said straight spring are connected to said first position-limiting portion and said second position-limiting portion, respectively, said straight spring always applies a pushing force to said light path barrier member to push said light path barrier member to be inserted into said insertion hole.

13. The laser apparatus of photoacoustic imaging system of claim 9 wherein the end of the optical path barrier member for insertion into the insertion hole has an inclined pushing surface; when the optical fiber plug is pulled out, the pushing surface is obliquely positioned in the plug hole relative to the optical axis and faces the direction in which the optical fiber plug is inserted; when the optical fiber plug is inserted, the optical fiber plug abuts against the pushing surface to push the optical path barrier piece away.

14. The laser apparatus of photoacoustic imaging system of claim 1 wherein said plug hole has a snap-in fitting disposed therein, said snap-in fitting being adapted to retain said fiber plug in said plug hole.

15. The laser apparatus of photoacoustic imaging system of claim 14 wherein said snap-in means is a radially expandable and contractible protrusion for snap-in with a snap-in groove on said fiber plug.

16. The laser apparatus of the photoacoustic imaging system of claim 1 wherein a light guide channel is disposed in the housing, the light guide channel comprising an incident end and an exit end, the housing having a connection hole, the exit end being aligned with the connection hole, the exit end being for connection of a fiber optic plug, and the laser being connected to the incident end of the light guide channel.

17. The laser apparatus of the photoacoustic imaging system of claim 2 wherein the laser apparatus further comprises: the device comprises a sensing part, a control part and a driving part;

the sensing piece is used for sensing and obtaining information that the optical fiber plug is close to or far away from the optical path barrier piece;

the control element comprises an output end and an input end, and the input end is connected with the sensing element and used for receiving the information obtained by the sensing element;

the driving piece is arranged on the plug socket and connected with the light path blocking piece and the output end of the control piece; the control piece controls the driving piece to drive the light path blocking piece to open or close the insertion hole based on the information obtained by the input end.

18. The laser apparatus of photoacoustic imaging system of claim 17 wherein said actuator drives said optical path blocking member in a radial direction of said insertion hole:

the inserting hole is opened or closed by rotating, or,

and the inserting hole is opened or closed by translation.

19. The laser apparatus of the photoacoustic imaging system of claim 17 wherein the driver comprises: a motor drive, a hydraulic drive, or a pneumatic drive.

20. The laser apparatus of the photoacoustic imaging system of claim 17 wherein the sensing member comprises: infrared sensors, microwave sensors or ultrasonic sensors.

21. The laser apparatus of a photoacoustic imaging system of any one of claims 1 to 20 wherein the optical path barrier is comprised of a ceramic material.

22. The laser apparatus of photoacoustic imaging system of claim 1 wherein the optical path barrier is comprised of a high temperature resistant deformable material.

23. The laser apparatus of a photoacoustic imaging system of claim 22 wherein the optical path barrier comprises a first barrier and a second barrier, the first barrier and the second barrier being disposed diametrically opposite to the receptacle and partially overlapping in the region of the central axis of insertion of the fiber optic plug into the receptacle.

24. A laser apparatus of a photoacoustic imaging system, comprising:

the optical fiber connector comprises a shell, wherein the shell is provided with a connecting hole, and the connecting hole is used for inserting an optical fiber plug;

the laser is arranged in the shell and used for emitting laser, and the connecting hole is positioned on a light path of the laser emitted by the laser; and

the light path barrier piece is movably arranged in the shell; when the optical fiber plug is pulled out, the light path blocking piece blocks and closes the connecting hole; when the optical fiber plug is inserted, the optical fiber plug pushes the optical path barrier piece to be inserted into the connecting hole.

25. The laser apparatus of photoacoustic imaging system of claim 24 wherein the optical path barrier member is rotatably or radially movably disposed with respect to the attachment aperture.

26. The laser apparatus of photoacoustic imaging system of claim 24 wherein said optical path barrier member has a reset member attached thereto, said reset member being adapted to drive said optical path barrier member to close said attachment hole in the fiber plug-out state.

27. The laser apparatus of photoacoustic imaging system of claim 26 wherein the reset piece is a torsion spring.

28. A photoacoustic imaging system comprising a probe, an optical fiber and a laser device according to any one of claims 1 to 27, the optical fiber being connected at one end to the probe and having a fiber plug at an end remote from the probe, the fiber plug being adapted to be detachably connected to the laser device; the optical fiber is used for transmitting the laser emitted by the laser device to the probe, and the probe is used for irradiating the laser to human tissues and recovering ultrasonic waves generated by the action of the laser on the human tissues.

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