CN116865082A

CN116865082A - Laser optical gate device and laser treatment equipment

Info

Publication number: CN116865082A
Application number: CN202310842211.9A
Authority: CN
Inventors: 请求不公布姓名; 曹云飞; 安麟簇·辛
Original assignee: Shenzhen Tonglu Technology Co ltd
Current assignee: Shenzhen Tonglu Technology Co ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2023-10-10

Abstract

The invention provides a laser shutter device, which comprises a circuit board, a mounting seat fixed on the circuit board, a linear motion driver fixed on the mounting seat and a laser shielding sheet driven by the linear motion driver to move linearly, wherein a control circuit and a driving circuit which are electrically connected are arranged on the circuit board, the control circuit outputs high and low levels to the driving circuit, the driving circuit respectively controls the linear motion driver to rotate forward and reversely to drive the laser shielding sheet to be positioned at a light blocking position and a light transmitting position on the same straight line respectively so as to block laser or enable the laser to pass through.

Description

Laser optical gate device and laser treatment equipment

Technical Field

The invention relates to the technical field of laser treatment, in particular to a laser shutter device and laser treatment equipment.

Background

Laser treatment devices have been widely used in clinical practice. When the laser treatment device is used, the optical gate is generally arranged to block laser, but the optical gate on the market at present has a complex structure and large occupied space, and is mostly controlled by a mechanism structure.

Disclosure of Invention

Based on the above, it is necessary to provide a laser shutter device and a laser therapeutic apparatus which have simple structures and are convenient to use, aiming at the defects in the prior art.

The invention provides a laser optical shutter device, which comprises a circuit board, a mounting seat fixed on the circuit board, a linear motion driver fixed on the mounting seat and a laser shielding sheet driven by the linear motion driver to move linearly, wherein a control circuit and a driving circuit which are electrically connected are arranged on the circuit board, the control circuit outputs high and low levels to the driving circuit, and the driving circuit respectively controls the linear motion driver to rotate forward and backward to drive the laser shielding sheet to be positioned at a light blocking position and a light transmitting position on the same straight line respectively so as to block laser or enable the laser to pass through.

Preferably, the switching between the forward rotation and the reverse rotation of the linear motion driver is realized by switching the high level and the low level of the output of the control circuit to the driving circuit.

Preferably, the control circuit comprises a single chip microcomputer, the driving circuit comprises a driving chip, a positive signal pin and a negative signal pin of the driving chip are respectively and electrically connected with a first IO pin and a second IO pin of the single chip microcomputer, and a first OUT pin and a second OUT pin of the driving chip are electrically connected with the linear motion driver.

Preferably, when the first IO pin of the single chip microcomputer outputs a high level to the positive signal pin of the driving chip and the second IO pin outputs a low level to the negative signal pin of the driving chip, the first OUT pin of the driving chip outputs a high level and the second OUT pin of the driving chip outputs a low level, and the driving chip drives the linear motion driver to rotate forward.

Preferably, when the first IO pin of the single chip microcomputer outputs a low level to the positive signal pin of the driving chip and the second IO pin outputs a high level to the negative signal pin of the driving chip, the first OUT pin of the driving chip outputs a low level and the second OUT pin of the driving chip outputs a high level, and the driving chip drives the linear motion driver to rotate reversely.

Preferably, the laser shutter device further comprises a position detection device and a bracket for mounting the laser shielding sheet, wherein the position detection device comprises a detection head mounted on the bracket and two position detection devices fixed on the circuit board.

Preferably, the detection head is a fixing part for installing the bracket on the linear motion driver, the two position detection devices are a first optocoupler switch and a second optocoupler switch which are placed at a certain distance along the linear motion direction of the fixing part, and the first optocoupler switch and the second optocoupler switch are respectively and electrically connected with a third IO pin and a fourth IO pin of the singlechip.

Preferably, when the fixing piece is located on the first optocoupler switch, the third IO pin of the single-chip microcomputer reads to a high level, the fourth IO pin reads to a low level, the first IO pin and the second IO pin of the single-chip microcomputer both output high levels to the positive signal pin and the negative signal pin of the driving chip, and the first OUT pin and the second OUT pin of the driving chip both output low levels, so that the linear motion driver stops moving.

Preferably, when the fixing piece is located on the second optocoupler switch, the third IO pin of the single-chip microcomputer reads to a low level, the fourth IO pin reads to a high level, the first IO pin and the second IO pin of the single-chip microcomputer both output high levels to the positive signal pin and the negative signal pin of the driving chip, and the first OUT pin and the second OUT pin of the driving chip both output low levels, so that the linear motion driver stops moving.

Preferably, the fixing piece is respectively located when the first optical coupler switch and the second optical coupler switch are respectively located, and the laser shielding piece is respectively located at the light blocking position and the light transmitting position.

Preferably, the linear motion actuator has a telescopic rod, the fixing member mounts the bracket to the telescopic rod, the telescopic rod is extended when the linear motion actuator is rotated forward, and the telescopic rod is retracted when the linear motion actuator is rotated backward.

Preferably, the linear motion actuator has a telescopic rod, the fixing member mounts the bracket to the telescopic rod, the telescopic rod is retracted when the linear motion actuator is rotated forward, and the telescopic rod is extended when the linear motion actuator is rotated backward.

Preferably, the laser shielding sheet has a reflecting sheet on which a reflecting film for reflecting laser light is plated.

Preferably, the laser shielding sheet has a function of absorbing laser light.

Preferably, the laser shutter device further comprises a power supply circuit, and the control circuit and the driving circuit are electrically connected with the power supply circuit.

Preferably, the power supply circuit comprises a connector, an overcurrent protection device, an electrostatic surge protection device, a magnetic bead, an anti-reverse connection device and a voltage stabilizer.

The invention also provides laser treatment equipment, which comprises a shell with a laser outlet, a laser fixed in the shell and the laser shutter device, wherein the laser shutter device is positioned between the laser and a transmission light path of the laser outlet.

Preferably, the laser treatment device is for intravascular laser ablation.

The laser shutter device and the laser treatment equipment realize shielding and opening control of a laser light path by using fewer parts, and have the advantages of simple structure, convenient use, stable performance, low failure rate in later use and high cost performance.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of a laser shutter device of the present invention.

FIG. 2 is another schematic diagram of a first embodiment of a laser shutter device of the present invention.

FIG. 3 is a block diagram of a portion of the modules of a laser shutter device of the present invention.

Fig. 4 is a power supply circuit diagram of the laser shutter device of the present invention.

Fig. 5 is a control circuit and a driving circuit diagram of the laser shutter device of the present invention.

Fig. 6 is a schematic view of a first embodiment of the laser treatment apparatus of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the description of the present invention, the terms "horizontal," "vertical," "upper," "lower," "left," "right," "inner," "outer," "therebetween," "between," and the like indicate an orientation or a positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Unless specifically stated or limited otherwise, the terms "connected," "secured" and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanical connection, electrical connection or magnetic connection; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the invention, "multiple" means more than one unless specifically defined otherwise.

Finally, it should be noted that, if not conflicting, the embodiments of the present invention and the features of the embodiments may be combined with each other, which are all within the protection scope of the present invention.

Referring to fig. 1 and 2, a first embodiment of a laser shutter device 100 according to the present invention is shown. The laser shutter device 100 includes a circuit board 10, a mount 20 fixed to the circuit board 10, a linear actuator 30 fixed to the mount 20, a bracket 40 attached to the linear actuator 30, a laser shielding sheet 50 attached to the bracket 40, and a position detecting device 60. The mounting base 20 is suspended and fixed on one side surface of the circuit board 10 through a plurality of fixing posts 22, and is provided with an accommodating space 24. The linear motion actuator 30 is fixed in the accommodating space 24 of the mounting base 20, includes a telescopic rod 32 capable of moving linearly, and protrudes out of the accommodating space 24. One end of the bracket 40 is mounted to the end of the telescopic rod 32 of the linear motion actuator 30 by a fixing member 42. A laser blocking tab 50 is mounted to the other opposite end of the bracket 40. The laser shielding sheet 50 includes an optical component such as an optical lens, and has a function of shielding, reflecting, and/or absorbing laser light. The position detection device 60 comprises a movable detection head and two stationary position detection means. In this embodiment, the fixing member 42 is used as the detecting head of the position detecting device 60, and the two position detecting devices are two optocoupler switches 64 fixed on the circuit board 10 and disposed at a certain distance along the linear motion direction of the telescopic rod 32 (i.e. the fixing member 22 or the laser shielding sheet 50). The two opto-coupler switches 64 are located in a first position and a second position, respectively. In this embodiment, a linear motion drive 30, such as a linear motion motor, that can be maintained in place after power failure and does not require continuous power supply, may be used to reduce power consumption.

With continued reference to fig. 3 to 5, the circuit board 10 is provided with a power supply circuit 12, a control circuit 14 and a driving circuit 16. In this embodiment, the power supply circuit 12 is powered by a +12v dc power supply. Specifically, the power supply circuit 12 includes a connector J2, an overcurrent protection device F13, an electrostatic surge protection device D35, a magnetic bead L1, an anti-reverse device Q1, and a voltage regulator U47. The direct current power supply is connected to the overcurrent protection device F13 through the connector J2 and is grounded, one electrostatic surge protection device D35 is connected in parallel, the overcurrent protection device F13 is connected to the 3 rd pin of the anti-reverse connection device Q1 through the magnetic bead L1, the 2 nd pin of the anti-reverse connection device Q1 outputs +12V direct current power supply to the driving circuit 16 and is connected to the 3 rd pin of the voltage stabilizer U47, and the 2 nd pin of the voltage stabilizer U47 outputs VCC_MCU voltage to the control circuit 14. In this embodiment, the control circuit 14 includes a single chip microcomputer U1, and the driving circuit 16 includes a driving chip U2. Specifically, the FIN pin (i.e., a positive signal pin) of the driving chip U2 is connected to the IO1 pin (i.e., a first IO pin) of the single chip U1, and the RIN pin (i.e., a negative signal pin) of the driving chip U2 is connected to the IO2 pin (i.e., a second IO pin) of the single chip U1. The IO3 pin (i.e., the third IO pin) and the IO4 pin (i.e., the fourth IO pin) of the single-chip microcomputer U1 are respectively electrically connected to the two opto-coupler switches 64 of the position detection apparatus 60. When in use, the circuit board 10 is also provided with electronic components such as a resistor, a capacitor, a diode and the like.

When the circuit board 10 is charged, if the fixing member 42 is located outside the two opto-coupler switches 64 of the position detecting device 60, the two opto-coupler switches 64 of the position detecting device 60 are energized to detect light, the low level is read from the IO3 pin and the IO4 pin of the single chip microcomputer U1, at this time, the IO1 pin and the IO2 pin of the single chip microcomputer U1 output low levels to the FIN pin and the RIN pin of the driving chip U2, respectively, and the linear motion driver 30 is in a standby state.

When the pin IO1 of the single chip U1 outputs a high level to the FIN pin of the driving chip U2 and the pin IO2 outputs a low level to the RIN pin of the driving chip U2, the pin OUT1 (i.e., the first OUT pin) of the driving chip U2 outputs a high level and the pin OUT2 (i.e., the second OUT pin) outputs a low level, so as to output a forward rotation control signal, and the linear motion driver 30 drives the telescopic rod 32 to move linearly. When the fixing member 42 moves linearly along with the telescopic rod 32 and enters the optocoupler switch 64 (i.e., the first optocoupler switch) located at the first position, the light is blocked by the fixing member 42, at this time, the pin IO3 of the single-chip microcomputer U1 reads to a high level, the pin IO4 reads to a low level, both the pin IO1 and the pin IO2 of the single-chip microcomputer U1 output a high level to the FIN pin and the RIN pin of the driving chip U2, and both the pin OUT1 and the pin OUT2 of the driving chip U2 output a low level, so that the linear motion driver 30 stops driving the telescopic rod 32 to move linearly.

If the pin IO1 of the single chip U1 continues to output the high level to the FIN pin of the driving chip U2 and the pin IO2 outputs the low level to the RIN pin of the driving chip U2 again, the pin OUT1 of the driving chip U2 outputs the high level again and the pin OUT2 outputs the low level again, so that the forward rotation control signal is continuously output, and the linear motion driver 30 continues to drive the telescopic rod 32 to move linearly along the same linear direction. At this time, the fixing member 42 moves along with the telescopic rod 32 to leave the optocoupler switch 64 at the first position, and the light of the optocoupler switch 64 at the first position is detected, so that the pin IO3 and the pin IO4 of the single-chip microcomputer U1 are both at low level. When the fixing member 42 moves linearly along with the telescopic rod 32 and enters the optocoupler switch 64 (i.e., the second optocoupler switch) at the second position, the light is blocked by the fixing member 42, at this time, the pin IO4 of the single-chip microcomputer U1 reads the high level, the pin IO3 reads the low level, the pins IO1 and IO2 of the single-chip microcomputer U1 both output the high level to the FIN pin and the RIN pin of the driving chip U2, and the pin OUT1 and the pin OUT2 of the driving chip U2 both output the low level, so that the linear motion driver 30 stops driving the telescopic rod 32 to move linearly.

If the pin IO1 of the single chip U1 outputs a low level to the FIN pin of the driving chip U2 again and the pin IO2 continues to output a high level to the RIN pin of the driving chip U2, the pin OUT1 of the driving chip U2 outputs a low level and the pin OUT2 outputs a high level, so as to output a reverse control signal, so that the linear motion driver 30 drives the telescopic rod 32 to move linearly in a direction opposite to the linear direction. Thus, the fixing member 42 moves along with the telescopic rod 32 to leave the optocoupler switch 64 located at the second position, and the light of the optocoupler switch 64 located at the second position is detected, so that the pin IO3 and the pin IO4 of the single-chip microcomputer U1 are both at low level. When the fixing member 42 moves linearly along with the telescopic rod 32 and enters the optocoupler switch 64 at the first position again, the light is blocked by the fixing member 42 again, at this time, the pin IO3 of the single-chip microcomputer U1 reads high level again, the pin IO4 reads low level again, the pin IO1 and the pin IO2 of the single-chip microcomputer U1 output high level to the FIN pin and the RIN pin of the driving chip U2, and the pin OUT1 and the pin OUT2 of the driving chip U2 output low level, so that the linear motion driver 30 stops driving the telescopic rod 32 to move linearly. In fact, the singlechip U1 may continue to transmit corresponding high-low level control signals to the driving chip U2 as required, and the linear motion driver 30 drives the telescopic rod 32 to move linearly, so that the fixing member 42 moves linearly to either one of two sides away from the optocoupler switch 64 located at the first position or the second position, and the above process may continue periodically.

In summary, the laser shutter device 100 adopts the linear motion actuator 30, which has the telescopic rod 32 that can extend and retract in the vertical direction, and the laser shielding plate 50 fixed on the top end of the telescopic rod 32 is used for controlling the opening and closing of the laser light path, and the upper and lower limit positions of the telescopic rod 32 are detected and judged by the upper and lower limit optocoupler switch 64, and the switching control of the upper and lower limit positions is performed by the upper and lower levels, so that the detection is accurate and the control is simple, and the shielding and opening control of the laser light path are realized by fewer parts, so that the debugging is convenient, the performance is stable, the later use failure rate is low, and the cost performance is high. In addition, when the laser shutter 50 of the laser shutter device 100 is switched to the light transmitting position, the laser shutter is not in the laser path, so that the laser is not deflected, the optical path is not affected, and the subsequent optical fiber coupling with the laser catheter is not affected.

With continued reference to fig. 6, a first embodiment of the laser treatment apparatus 200 of the present invention is illustrated. The laser treatment apparatus 200 includes a housing 210, and a laser 220, a laser absorber 240, and the laser shutter device 100 fixed in the housing 210. The housing 210 is provided with a laser outlet 212. The laser shutter device 100 is located in the middle of the linear transmission path between the laser 220 and the laser outlet 212, and is vertically fixed at the bottom of the housing 210, that is, the same straight line where the light transmitting position and the light blocking position of the laser shutter 50 are located is perpendicular to the transmission path of the laser, and the two opto-coupler switches 64 of the position detection device 60 are located at a lower limit position (e.g. a first position) and an upper limit position (e.g. a second position) respectively.

Normally, the fixing member 42 enters the optocoupler switch 64 located at the lower limit (i.e., the first position), so that the laser shielding sheet 50 is located at the light blocking position. At this time, even if the laser 220 fails, the accidental emission of laser light is blocked by the laser shielding sheet 50, so that the laser light is prevented from being emitted from the laser outlet 212 to cause damage, thereby playing a role in safety protection. In this embodiment, the laser shielding plate 50 has a reflective plate, on which a reflective film capable of reflecting laser light is coated, and the normal direction of the reflective plate (i.e., the laser shielding plate 50) forms an included angle with the transmission light path of the laser light. That is, when the laser 220 accidentally emits laser light, the laser light is blocked by the laser shielding sheet 50, and then reflected by the upper reflecting sheet thereof to the laser absorber 240, and absorbed thereby. In addition, once there is scattering of the laser light, it is absorbed by the housing 210, avoiding damage to components within the housing 210. In other embodiments, the laser shielding sheet 50 may absorb the laser light emitted by the laser 220, and the laser absorber 240 is not required. In this case, the normal direction of the laser shielding sheet 50 and the transmission optical path of the laser may be overlapped.

When the laser treatment apparatus 200 is powered on, the circuit board 10 is electrified, the control circuit 14 controls the two optocoupler switches 64 of the position detection device 60 to emit light, the light of the optocoupler switch 64 located at the lower position (i.e. the first position) is blocked by the fixing member 42, the light of the optocoupler switch 64 located at the upper position (i.e. the second position) can be detected, and then the pin IO3 of the single-chip microcomputer U1 reads to a high level, and the pin IO4 reads to a low level. The IO1 pin and the IO2 pin of the singlechip U1 both output high level to the FIN pin and the RIN pin of the driving chip U2, and the OUT1 pin and the OUT2 pin of the driving chip U2 both output low level, and the linear motion driver 30 is in a standby state and can not drive the telescopic rod 32 to linearly move temporarily.

When preparing operation treatment, the IO1 pin of the singlechip U1 continuously outputs high level to the FIN pin of the driving chip U2, and the IO2 pin outputs low level to the RIN pin of the driving chip U2. Thus, the OUT1 pin of the driving chip U2 outputs a high level, and the OUT2 pin outputs a low level, so as to output a forward rotation control signal, and the linear motion driver 30 drives the telescopic rod 32 to linearly move toward the opto-coupler switch 64 located at the upper limit position (i.e., the second position). Therefore, the fixing member 42 moves linearly along with the telescopic rod 32 to leave the optocoupler switch 64 at the lower limit (i.e. the first position), and the light of both optocoupler switches 64 can be detected, so that the pin IO3 and pin IO4 of the single-chip microcomputer U1 are both at low level.

When the fixing member 42 moves linearly along with the telescopic rod 32 and enters the optocoupler switch 64 at the upper limit position (i.e., the second position), the light is blocked by the fixing member 42, the pin IO4 of the single-chip microcomputer U1 reads to a high level, the pin IO3 reads to a low level, the pins IO1 and IO2 of the single-chip microcomputer U1 both output a high level to the FIN pin and the RIN pin of the driving chip U2, and the pins OUT1 and OUT2 of the driving chip U2 both output a low level, so that the linear motion driver 30 stops driving the telescopic rod 32 to move linearly. Thus, the laser shutter 50 on the stand 40 is moved from the light blocking position to the light transmitting position, and the telescopic link 32 is in the extended state.

At this time, the laser 220 is controlled to emit laser light along a straight light path from the laser outlet 212 of the housing 210, and the laser light is transmitted to a lesion site through a laser catheter inserted into the laser outlet 212, so as to perform laser ablation of lesions such as intravascular calcification, plaque, thrombus, or occlusion.

When the treatment is completed and the laser 220 stops emitting laser light, the laser shutter 50 on the support 40 is required to return from the light transmitting position to the light blocking position. The pin IO1 of the single chip U1 outputs a low level to the FIN pin of the driving chip U2, and the pin IO2 outputs a high level to the RIN pin of the driving chip U2, so that the pin OUT1 of the driving chip U2 outputs a low level, and the pin OUT2 outputs a high level, thereby outputting a reverse control signal, and the linear motion driver 30 drives the telescopic rod 32 to linearly move in the direction of the opto-coupler switch 64 located at the lower limit position (i.e., the first position). The fixing member 42 moves along with the telescopic rod 32 to leave the optocoupler switches 64 located at the second position (i.e. the upper position), and the light rays of the two optocoupler switches 64 can be detected, so that the pin IO3 and the pin IO4 of the single-chip microcomputer U1 are both at low level. When the fixing member 42 moves linearly along with the telescopic rod 32 and enters the optocoupler switch 64 at the first position (i.e. the lower limit position) again, the light is blocked by the fixing member 42 again, at this time, the pin IO3 of the single chip microcomputer U1 reads to the high level, the pin IO4 reads to the low level, the pins IO1 and IO2 of the single chip microcomputer U1 both output the high level to the FIN pin and the RIN pin of the driving chip U2, the pin OUT1 and the pin OUT2 of the driving chip U2 both output the low level, the linear motion driver 30 stops driving the telescopic rod 32 to move linearly, the laser shielding plate 50 on the bracket 40 returns to the light blocking position, and the telescopic rod 32 is in the retracted state. Then, even if the laser 220 emits laser light due to a malfunction, a runaway, or an accident, the laser light is blocked by the laser shielding sheet 50 and then reflected to the laser absorber 240 to be absorbed, thereby protecting the subject from injury. In addition, if the laser treatment device 200 is accidentally powered down or loses power during treatment, the laser shielding sheet 50 on the support 40 will also return to the light blocking position to block the laser light from exiting the laser outlet 212 of the housing 210.

For the laser treatment described above, it may be desirable to continue multiple times. The above process may be repeated. In other embodiments, the light transmission position of the laser shielding sheet 50 and the light blocking position are not perpendicular to the transmission path of the laser 220.

As can be seen from the above, the laser shutter device 100 is designed as a redundancy protection device in the laser treatment apparatus 200, so that the redundant laser can be effectively blocked from being emitted when the laser is not needed, and injury is prevented. First, the laser shutter device 100 is vertically installed, occupies a small space, and is simple to install. Secondly, the laser shutter device 100 adopts the linear motion driver 30, which has the telescopic rod 32 which can be extended and contracted in the up-down direction, and the laser shielding sheet 50 fixed at the top end of the telescopic rod 32 is used for controlling the opening and closing of the laser light path, and the upper limit position and the lower limit position of the telescopic rod 32 are detected and judged through the upper limit optical coupler switch 64, and the switching control of the upper limit position and the lower limit position is carried out through the high level and the low level, so that the detection is accurate, the control is simple, and the shielding and the opening control of the laser light path are realized through fewer parts, so that the debugging is convenient, the performance is stable, the later use failure rate is low, and the cost performance is high. Moreover, since the laser shutter 50 of the laser shutter device 100 is not in the laser path when it is switched to the light transmitting position, the laser is not deflected, the optical path is not affected, and the subsequent optical fiber coupling with the laser catheter is not affected.

The forward rotation and the reverse rotation, the light blocking position and the light transmitting position, and the positions of the first optical coupler switch and the second optical coupler switch are all relative, and can be exchanged or have different corresponding relations.

The above examples represent only a limited embodiment of the invention, which is described in more detail and in no way should be interpreted as limiting the scope of the invention. It should be noted that, for those skilled in the art, it is possible to make several modifications, improvements or deterioration without departing from the inventive concept, and that the linear motion motor in the embodiment may be any other linear motion actuator 30, which is within the scope of the invention. Accordingly, the scope of the invention is defined by the claims.

Claims

1. The laser optical shutter device is characterized by comprising a circuit board, a mounting seat fixed on the circuit board, a linear motion driver fixed on the mounting seat and a laser shielding sheet driven by the linear motion driver to move linearly, wherein a control circuit and a driving circuit are arranged on the circuit board and are electrically connected, the control circuit outputs high and low levels to the driving circuit, and the driving circuit respectively controls the linear motion driver to rotate positively and reversely to drive the laser shielding sheet to be positioned at a light blocking position and a light transmitting position on the same straight line so as to block laser or enable the laser to pass through.

2. A laser shutter device as claimed in claim 1, wherein: the switching between the forward rotation and the reverse rotation of the linear motion driver is realized through the high-low level conversion of the control circuit output to the driving circuit.

3. A laser shutter device as claimed in claim 2, wherein: the control circuit comprises a singlechip, the driving circuit comprises a driving chip, a positive signal pin and a negative signal pin of the driving chip are respectively and electrically connected with a first IO pin and a second IO pin of the singlechip, and a first OUT pin and a second OUT pin of the driving chip are electrically connected with the linear motion driver.

4. A laser shutter device as claimed in claim 3, wherein: when the first IO pin of the singlechip outputs high level to the positive signal pin of the driving chip and the second IO pin outputs low level to the negative signal pin of the driving chip, the first OUT pin of the driving chip outputs high level and the second OUT pin of the driving chip outputs low level, and the driving chip drives the linear motion driver to rotate positively.

5. A laser shutter device as claimed in claim 4, wherein: when the first IO pin of the singlechip outputs a low level to the positive signal pin of the driving chip and the second IO pin outputs a high level to the negative signal pin of the driving chip, the first OUT pin of the driving chip outputs a low level and the second OUT pin of the driving chip outputs a high level, and the driving chip drives the linear motion driver to rotate reversely.

6. A laser shutter device as claimed in claim 5, wherein: the laser shutter device also comprises a position detection device and a bracket for mounting the laser shielding sheet, wherein the position detection device comprises a detection head mounted on the bracket and two position detection devices fixed on the circuit board.

7. A laser shutter device as claimed in claim 6, wherein: the detection head is a fixing piece for installing the support on the linear motion driver, the two position detection devices are a first opto-coupler switch and a second opto-coupler switch which are placed at a certain distance along the linear motion direction of the fixing piece, and the first opto-coupler switch and the second opto-coupler switch are respectively and electrically connected with a third IO pin and a fourth IO pin of the singlechip.

8. A laser shutter device as claimed in claim 7, wherein: when the fixing piece is located on the first optocoupler switch, the third IO pin of the single chip microcomputer reads to a high level, the fourth IO pin reads to a low level, the first IO pin and the second IO pin of the single chip microcomputer both output high levels to the positive signal pin and the negative signal pin of the driving chip, the first OUT pin and the second OUT pin of the driving chip both output low levels, and the linear motion driver stops moving.

9. A laser shutter device as claimed in claim 8, wherein: when the fixing piece is located in the second optocoupler switch, the third IO pin of the single chip microcomputer reads to a low level, the fourth IO pin reads to a high level, the first IO pin and the second IO pin of the single chip microcomputer both output high levels to the positive signal pin and the negative signal pin of the driving chip, the first OUT pin and the second OUT pin of the driving chip both output low levels, and the linear motion driver stops moving.

10. A laser shutter device as claimed in claim 9, wherein: the fixing piece is respectively positioned at the light blocking position and the light transmitting position when the first optical coupler switch and the second optical coupler switch are respectively positioned.

11. A laser shutter device as claimed in claim 10, wherein: the linear motion driver is provided with a telescopic rod, the fixing piece is used for installing the support on the telescopic rod, when the linear motion driver rotates positively, the telescopic rod stretches out, and when the linear motion driver rotates reversely, the telescopic rod retracts.

12. A laser shutter device as claimed in claim 10, wherein: the linear motion driver is provided with a telescopic rod, the fixing piece is used for installing the support on the telescopic rod, when the linear motion driver rotates positively, the telescopic rod is retracted, and when the linear motion driver rotates reversely, the telescopic rod is extended.

13. A laser shutter device as claimed in claim 1, wherein: the laser shielding sheet is provided with a reflecting mirror plate, and a reflecting film for reflecting laser is plated on the reflecting mirror plate.

14. A laser shutter device as claimed in claim 1, wherein: the laser shielding sheet has a function of absorbing laser.

15. A laser shutter device as claimed in claim 1, wherein: the laser shutter device further comprises a power supply circuit, and the control circuit and the driving circuit are electrically connected with the power supply circuit.

16. A laser shutter device as claimed in claim 15, wherein: the power supply circuit comprises a connector, an overcurrent protection device, an electrostatic surge protection device, a magnetic bead, an anti-reverse connection device and a voltage stabilizer.

17. A laser treatment apparatus comprising a housing having a laser outlet and a laser fixed within the housing, a laser shutter device as claimed in any one of claims 1 to 16 located intermediate the laser and a transmission path of the laser outlet.

18. A laser therapy apparatus as claimed in claim 17, wherein: the laser treatment device is used for intravascular laser ablation.