Continuous light output device of carbon dioxide laser moxibustion therapy instrument and working method

Abstract

The invention provides a continuous light output device of a carbon dioxide laser moxibustion therapy instrument and a working method. The continuous light output device of the carbon dioxide laser moxibustion instrument comprises a carbon dioxide laser tube, a laser attenuation joint and a light guide arm. The carbon dioxide laser tube is provided with a laser tube water inlet nozzle and a laser tube water outlet nozzle, the end part of the carbon dioxide laser tube is provided with a laser output mirror surface, the laser attenuation sections are provided with beam expanders, an attenuation small hole is arranged between the beam expanders of two adjacent stages of laser attenuation sections, and a water cooling channel is arranged in the area where the attenuation small hole is located. The output laser power realistically restores the characteristics of traditional moxibustion therapy, and the continuous and stable laser output is closer to the fumigation effect of moxa sticks. Compared with the prior art, laser steady-state continuous output is achieved through low working voltage, ionization and sputtering of the metal electrodes are obviously reduced, and the service life of the laser is effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of laser moxibustion therapy, and in particular to a continuous light output device of a carbon dioxide laser moxibustion therapy apparatus and a working method thereof, so as to achieve the effect of simulating the burning of traditional moxa sticks. Background Art

[0002] Moxa stick moxibustion is a method of burning moxa sticks and placing them on acupoints or lesions for fumigation. The burning of moxa sticks in traditional moxibustion is a continuous warm state. The diameter of traditional moxa sticks is 18 mm, and the power of the fumigation hot zone is 30-130 mW. In order to avoid the smoke stimulation of moxibustion, achieve smoke-free and improve safety, the industry has been studying the use of carbon dioxide lasers to simulate traditional moxibustion, because the wavelength of carbon dioxide lasers is the closest to the heat wavelength radiated by moxa stick moxibustion. In order to simulate the burning effect of moxa sticks well, the light moxibustion device irradiated by carbon dioxide lasers needs to meet the following conditions:

[0003] 1) The diameter of the carbon dioxide laser beam is about 18mm;

[0004] 2) The output power of CO2 laser is between 30-130 mW and can be fine-tuned;

[0005] 3) The power of carbon dioxide laser is pure continuous output without high-frequency pulses.

[0006] In order to improve the stability of the laser moxibustion apparatus, the following conditions should also be met: 4) the irradiation device of the carbon dioxide laser moxibustion apparatus can adjust the irradiation position and can be self-locking.

[0007] At present, there are two typical lasers for carbon dioxide lasers. One is a laser with a radio frequency excitation structure, which works in a high-frequency pulse output mode, so it cannot meet the above condition 3. The second type of laser uses a glass tube discharge system, which uses the electrode glow discharge in the discharge tube to generate laser. If the structure of this type of laser is too short, the difficulty of tube embryo production will increase sharply, and the stress distribution of the tube embryo is very complex. The total length is generally not less than 280mm. Taking a glass tube with a total length of 280mm as an example, the working gas is stored between the electrodes, and the electrode spacing is about 240mm. A DC voltage is applied between the electrodes with an adjustable constant current source. When the voltage is low, the resistance between the electrodes is infinite and the current is 0. When the voltage rises to the starting voltage of about 15KV, the working gas in the tube is broken down, the gas is ionized and then turned on, there is resistance between the electrodes, and the voltage drops to a working voltage of about 0.7KV, but when the current is less than 6mA, the arc is unstable and is in a state of repeated high-frequency arc breaking and re-breakdown for starting, so this section is a quasi-continuous output state. The repeated high-frequency arc breaking and re-breakdown will also aggravate the ionization of the electrode in the cavity, which will move toward the inner wall of the output lens to form sputtering shielding, aggravating the life exhaustion of the laser. Studies have shown that when working in a stable state at a lower operating voltage, the ionization and sputtering of the metal electrode will be significantly reduced.

[0008] refer to Figure 1 , the minimum power of the second type of carbon dioxide laser during stable discharge is 4 watts. After the current is greater than 6mA, the gas breaks down stably, the voltage stabilizes at the operating voltage, and the output power increases steadily and rapidly as the current increases, which is a pure continuous output state. When the current is reduced to below 6mA, when the laser works in a low-power range, the power output is in a quasi-continuous output state, and the above condition 3 cannot be met. The prior art generally adopts the second type of carbon dioxide laser, which achieves quasi-continuous output in a low-power range by adjusting the current, so it is impossible to effectively and truly simulate the effect of moxa stick burning. In addition, this type of carbon dioxide laser output uses a light guide arm, and the light guide arm joint is very flexible and cannot be self-locked anywhere in the irradiation area. Summary of the invention

[0009] The present invention aims to provide a continuous light output device for a carbon dioxide laser moxibustion instrument, which can realize continuous output of the carbon dioxide laser instrument at milliwatt level power, thereby achieving the effect of simulating the burning of traditional moxa sticks.

[0010] In order to solve the above problems, the technical solution adopted by the present invention is as follows:

[0011] A continuous light output device for a carbon dioxide laser moxibustion instrument comprises a carbon dioxide laser tube, a multi-stage laser attenuation section and a light guide arm.

[0012] The laser attenuation node is coaxially mounted at the laser output end of the carbon dioxide laser tube, and the light guide arm is mounted at the laser output end of the last laser attenuation node.

[0013] The carbon dioxide laser tube is provided with a laser tube water inlet nozzle and a laser tube water outlet nozzle, and the end of the carbon dioxide laser tube is provided with a laser output mirror.

[0014] Adjacent laser attenuation nodes are connected in series, and the laser attenuation node comprises a beam expander installed in a tube body. An attenuation hole is arranged between the beam expanders of two adjacent laser attenuation nodes, and a water cooling channel is arranged in the area where the attenuation hole is located.

[0015] Furthermore, the overall shape of the water cooling channel is U-shaped, and the two ends of the water cooling channel are a cooling water inlet nozzle and a cooling water outlet nozzle which are connected to the outside of the tube body.

[0016] Furthermore, the laser attenuation node is composed of three laser attenuation nodes connected in series, the first and second laser attenuation nodes both use a 2.0-fold beam expander, the third laser attenuation node uses a 2.0-fold beam expander, an attenuation aperture with a diameter of 1.8 mm is used between the first and second laser attenuation nodes, and an attenuation aperture with a diameter of 3 mm is used between the second and third laser attenuation nodes.

[0017] Furthermore, the length of the carbon dioxide laser tube is 260 mm, the output power of the carbon dioxide laser tube is 4 W, the spot diameter is 2 mm, the output power after passing through the first beam expander is 4 W, the output spot diameter is 6 mm, the output power of the laser after passing through the attenuation node aperture with a diameter of 1.8 mm is 0.36 W, the output spot diameter after passing through the second beam expander is 5.4 mm, and the output power after passing through the third beam expander is 0.1 W, and the output spot diameter is 18 mm.

[0018] Furthermore, the light guide arm is connected by several sections of reflective joints, and the tube end of the last-stage laser attenuation node and the reflective joint are respectively provided with a circle of inclined protrusions along the circumferential surface at the end, and positioning locking rings are sleeved on the contact parts of the inclined protrusions between the tube end of the laser attenuation node and the reflective joint and between adjacent reflective joints, and the tube end of the laser attenuation node and the reflective joint, as well as between the reflective joints, are connected and fixed by the cooperation of the locking screw and the positioning locking ring.

[0019] The present invention also provides a working method of the continuous light output device of the carbon dioxide laser moxibustion therapy apparatus, comprising the following steps:

[0020] S1. Install and connect the CO2 laser tube, several laser attenuation sections and the light guide arm;

[0021] S2. Cooling water is introduced. The cooling water flows into the CO2 laser from the laser tube water inlet nozzle, flows out from the laser tube water outlet nozzle, and then enters the cooling water inlet nozzle of the water cooling channel. After passing through the water cooling channel, it flows out from the cooling water outlet nozzle and returns to the laser tube water inlet nozzle to form a cycle;

[0022] S3. The CO2 laser tube is powered on, and high-power continuous output is achieved in the stable ignition working section. The laser power is attenuated in proportion to the spot area after the beam expander at each level of laser attenuation section and passes through the attenuation pinhole. The laser output after the last beam expander has a diameter of 18 mm.

[0023] S4. The laser after beam expansion and attenuation is reflected multiple times by the reflective joints and output at the end for moxibustion therapy.

[0024] The working principle of the present invention is to make the carbon dioxide laser tube work in the stable ignition working section of high-power continuous output, and then use the power attenuation method to obtain the required micro-power to achieve the real effect of simulating moxa stick moxibustion. The laser attenuation section can be connected in series with multiple sections using the same structure according to the different attenuation rates and the size of the attenuation power.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The laser power output by the present invention faithfully restores the characteristics of traditional moxibustion therapy, and the continuous and stable laser output is closer to the fumigation effect of moxa sticks.

[0027] 2. Compared with the method of adjusting the current to make the carbon dioxide laser work in the low-power, high-frequency and high-voltage starting range for a long time, the present invention realizes the steady-state continuous output of the laser through a lower working voltage, and the ionization and sputtering of the metal electrode are significantly reduced, which effectively prolongs the service life of the laser.

[0028] 3. The present invention utilizes a positioning locking ring to clamp the circular inclined surface structure, and simultaneously plays the role of center positioning, end face positioning and locking. Appropriate adjustment of the locking screw can change the locking force of the positioning locking ring, thereby adjusting the flexibility of rotation between joints and the self-locking force, thereby satisfying the function of the light guide arm joint to self-lock anywhere in the irradiation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is the power output principle diagram of the second existing carbon dioxide laser.

[0030] Figure 2 It is a structural schematic diagram of a preferred embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the installation of a carbon dioxide laser and a laser attenuation node involved in a preferred embodiment of the present invention.

[0032] Figure 4 For along Figure 3 Cross-sectional view at AA in the middle.

[0033] Figure 5 This is a schematic diagram of the principle of laser transmission through a laser attenuation node in a preferred embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the connection between the laser attenuation joint tube end and the reflection joint involved in a preferred embodiment of the present invention.

[0035] Figure 7 For along Figure 6 Cross-sectional view at the middle BB. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the purpose, technical solutions and advantages of the present invention will become clearer. It should be noted that the described embodiments are preferred embodiments of the present invention, rather than all embodiments.

[0037] Example

[0038] Combination Figure 2As shown, a continuous light output device of a carbon dioxide laser moxibustion instrument comprises a carbon dioxide laser tube 1 with a length of 260 mm, a three-stage laser attenuation section 2 and a light guide arm 3. The laser attenuation section 2 is coaxially mounted at the laser output end of the carbon dioxide laser tube 1, the light guide arm 3 is mounted at the laser output end of the third-stage laser attenuation section 2, the carbon dioxide laser tube 1 is provided with a laser tube water inlet nozzle 11 and a laser tube water outlet nozzle 12, and a laser output mirror 13 is provided at the end of the carbon dioxide laser tube 1. The laser attenuation section 2 comprises a beam expander 22 mounted in the tube body, an attenuation aperture 23 is provided between the beam expanders of two adjacent laser attenuation sections 2, and a water cooling channel 24 is provided in the area where the attenuation aperture 23 is located.

[0039] refer to Figure 4 The overall shape of the water cooling channel 24 is preferably U-shaped, and the two ends of the water cooling channel 24 are cooling water inlet nozzles 24a and cooling water outlet nozzles 24b that are connected to the outside of the tube body. The first and second laser attenuation nodes both use 3x beam expanders, the third laser attenuation node uses a 6x beam expander, a 1.8 mm diameter attenuation aperture is used between the first and second laser attenuation nodes, and a 3 mm diameter attenuation aperture is used between the second and third laser attenuation nodes.

[0040] refer to Figure 5 The output power of the carbon dioxide laser tube 1 is 4W, the spot diameter of the input laser is 2mm, the output power after passing through the 3x beam expander of the first-stage laser attenuation section is 4W, and the output spot diameter is 6mm. The output power of the laser after passing through the attenuation section hole with a diameter of 1.8mm is 0.36W, and the output spot diameter after passing through the 3x beam expander of the second-stage laser attenuation section is 5.4mm. The laser then passes through the attenuation section hole with a diameter of 3mm, and then passes through the 6x beam expander of the third-stage laser attenuation section. The output power is 0.1W, and the output spot diameter is 18mm.

[0041] The light guide arm 3 in this embodiment is formed by connecting four sections of reflective joints 31. Figure 6 and Figure 7 As shown, the tube end of the laser attenuation joint 2 and the reflection joint are respectively provided with a circle of inclined protrusions 4 along the circumferential surface at the end, and a positioning lock ring 5 is sleeved on the contact part of the inclined protrusion 4 between the tube end of the laser attenuation joint 2 and the reflection joint, and the tube end of the laser attenuation joint is connected and fixed to the reflection joint by the cooperation of the locking screw 6 and the positioning lock ring 5. The connection and fixation between adjacent reflection joints also adopts the above-mentioned structural form.

[0042] The present invention also provides a working method of the continuous light output device of the carbon dioxide laser moxibustion therapy apparatus, comprising the following steps:

[0043] S1. Install and connect the CO2 laser tube, several laser attenuation sections and the light guide arm;

[0044] S2. Cooling water is introduced. The cooling water flows into the CO2 laser from the laser tube water inlet nozzle, flows out from the laser tube water outlet nozzle, and then enters the cooling water inlet nozzle of the water cooling channel. After passing through the water cooling channel, it flows out from the cooling water outlet nozzle and returns to the laser tube water inlet nozzle to form a cycle;

[0045] S3. The CO2 laser tube is powered on, and high-power continuous output is achieved in the stable ignition working section. The laser power is attenuated in proportion to the spot area after the beam expander at each level of laser attenuation section and passes through the attenuation pinhole. The laser output after the last beam expander has a diameter of 18 mm.

[0046] S4. The laser after beam expansion and attenuation is reflected multiple times by the reflective joints and output at the end for moxibustion therapy.

[0047] The transmission efficiency of the beam expander involved in this embodiment is about 85%, and the total loss rate of the four reflectors of the light guide arm is generally 10%, so the laser power eventually decays to 0.07 W. By fine-tuning the current upward, a high-end power of 0.12 W can be obtained to meet the needs of simulated moxa stick moxibustion therapy.

[0048] The working principle of the present invention is to make the carbon dioxide laser tube work in the stable ignition working section of high-power continuous output, and then use the power attenuation method to obtain the required micro-power to achieve the real effect of simulating moxa stick moxibustion. The laser attenuation section can be connected in series with multiple sections using the same structure according to the different attenuation rates and the size of the attenuation power.

[0049] The above is only a description of the preferred embodiment of the present invention, and is not intended to limit the scope of protection of the present invention. Obviously, any technician familiar with the field can easily think of replacements or changes to obtain other embodiments based on the above embodiments, which should all be included in the scope of protection of the present invention.

Claims

1. A continuous light output device for a carbon dioxide laser moxibustion apparatus, characterized in that: Including CO2 laser tube, several levels of laser attenuation sections and light guide arms, The laser attenuation node is coaxially mounted at the laser output end of the carbon dioxide laser tube, and the light guide arm is mounted at the laser output end of the last laser attenuation node. The carbon dioxide laser tube is provided with a laser tube water inlet nozzle and a laser tube water outlet nozzle, and the end of the carbon dioxide laser tube is provided with a laser output mirror. Adjacent laser attenuation nodes are connected in series, and the laser attenuation node comprises a beam expander installed in a tube body. An attenuation hole is arranged between the beam expanders of two adjacent laser attenuation nodes, and a water cooling channel is arranged in the area where the attenuation hole is located.

2. The continuous light output device of the carbon dioxide laser moxibustion therapy apparatus according to claim 2, characterized in that: The overall shape of the water cooling channel is U-shaped, and the two ends of the water cooling channel are a cooling water inlet nozzle and a cooling water outlet nozzle which are connected with the outside of the tube body.

3. The continuous light output device of the carbon dioxide laser moxibustion therapy apparatus according to claim 1, characterized in that: The laser attenuation node is composed of three laser attenuation nodes connected in series. The first and second laser attenuation nodes both use 3x beam expanders, the third laser attenuation node uses a 6x beam expander, an attenuation hole with a diameter of 1.8 mm is used between the first and second laser attenuation nodes, and an attenuation hole with a diameter of 3 mm is used between the second and third laser attenuation nodes.

4. The continuous light output device of the carbon dioxide laser moxibustion therapy apparatus according to claim 1, characterized in that: The length of the carbon dioxide laser tube is 260mm, the output power of the carbon dioxide laser tube is 4W, the spot diameter is 2mm, the output power after passing through the first beam expander is 4W, the output spot diameter is 6mm, the output power of the laser after passing through the attenuation node aperture with a diameter of 1.8mm is 0.36W, the output spot diameter after passing through the second beam expander is 5.4mm, and the output power after passing through the third beam expander is 0.1W, and the output spot diameter is 18mm.

5. The continuous light output device of the carbon dioxide laser moxibustion therapy apparatus according to claim 1, characterized in that: The light guide arm is connected by several sections of reflective joints. The tube end of the last-stage laser attenuation node and the reflective joint are respectively provided with a circle of inclined protrusions along the circumferential surface at the end. Positioning locking rings are sleeved on the contact parts of the inclined protrusions between the tube end of the laser attenuation node and the reflective joint and between adjacent reflective joints. The tube end of the laser attenuation node and the reflective joint, as well as between the reflective joints, are connected and fixed by the cooperation of the locking screw and the positioning locking ring.

6. The working method of the continuous light output device of the carbon dioxide laser moxibustion therapy apparatus according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Install and connect the CO2 laser tube, several laser attenuation sections and the light guide arm; S2. Cooling water is introduced. The cooling water flows into the CO2 laser from the laser tube water inlet nozzle, flows out from the laser tube water outlet nozzle, and then enters the cooling water inlet nozzle of the water cooling channel. After passing through the water cooling channel, it flows out from the cooling water outlet nozzle and returns to the laser tube water inlet nozzle to form a cycle; S3. The CO2 laser tube is powered on, and high-power continuous output is achieved in the stable ignition working section. The laser power is attenuated in proportion to the spot area after the beam expander at each level of laser attenuation section and passes through the attenuation pinhole. The laser output after the last beam expander has a diameter of 18 mm. S4. The laser after beam expansion and attenuation is reflected multiple times by the reflective joints and output at the end for moxibustion therapy.

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