Portable low-temperature therapeutic apparatus with adjustable spraying angle
By combining a spherical hinge and a magnetic pressure block, the pressure loss in the flow channel is dynamically compensated, which solves the problem of pressure instability during the angle adjustment process of the cryotherapy device and achieves stable treatment effect across the entire angle range.
Patent Information
- Application Number
- CN202512033732.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-06
AI Technical Summary
Existing cryogenic therapy devices lack dynamic pressure compensation during nozzle angle adjustment, resulting in significant differences in nozzle outlet medium pressure at different spray angles, making it difficult to achieve stable treatment across the entire angle range.
It adopts a spherical hinge structure and magnetic pressure block, and dynamically compensates for flow channel pressure loss through the design of elastic cavity and locking component. The locking structure ensures the stability of the spray angle, including the combined use of nozzle, spherical hinge, trigger and locking component.
It achieves stable gas pressure at different injection angles, ensuring the uniformity and safety of cryotherapy and avoiding local frostbite and attenuation of cryotherapy effects.
Smart Images
Figure CN121606432A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, and in particular to a portable cryotherapy device with adjustable spray angle. Background Technology
[0002] Portable cryotherapy devices with adjustable spray angles are key equipment for achieving precise local cryotherapy in clinical medicine, and are widely used in dermatology for acne treatment, sports medicine for soft tissue injury rehabilitation, and postoperative swelling and pain relief in surgery. These devices achieve local cooling by spraying a cryogenic medium (such as nitrogen dioxide) onto the affected area to inhibit inflammation and relieve pain. Because of the significant morphological differences in different treatment areas of the human body (such as joint spaces, facial contours, and limb curvatures), the spray angle needs to be adjusted to ensure the cryogenic medium acts precisely on the target area. Therefore, the flexibility and adjustability of the spray angle is one of the core performance indicators for adapting the device to diverse clinical needs. Existing cryotherapy devices with adjustable spray angle typically achieve angle adjustment through a flexible connecting tube, a rotating shaft with a positioning pin, or a ball-joint nozzle seat. The process involves medical personnel manually moving the nozzle or adjusting the positioning mechanism to change its direction, aligning the nozzle with the affected area. The device is then turned on, allowing the cryogenic medium to be delivered to the nozzle via the inlet pipe and angle adjustment structure before being sprayed out. However, existing devices generally suffer from a technical defect in the angle adjustment process: when the nozzle rotates around its center of rotation, the flow path between the inlet pipe and the nozzle bends. The greater the bend angle, the greater the pressure loss resulting from the superposition of frictional resistance and local resistance along the flow path.
[0003] Existing equipment lacks a pressure compensation structure that is linked to the angle of rotation. It relies solely on a flow channel of fixed diameter or a static elastic component to maintain pressure, making it impossible to dynamically adjust the compensation force according to changes in the angle. This results in significant differences in the medium pressure at the nozzle outlet under different spray angles: when the angle is small, the pressure loss is small, and excessive spray intensity can easily cause local frostbite; when the angle is large, the pressure loss increases dramatically, and insufficient spray intensity leads to a decrease in the effect of cryotherapy, making it difficult to achieve stable treatment across the entire angle range.
[0004] Therefore, to address the aforementioned problems, a portable cryotherapy device with adjustable spray angle is proposed. Summary of the Invention
[0005] To overcome the above shortcomings, the present invention provides a portable cryotherapy device with adjustable spray angle, which aims to improve the problem that some existing devices rely on a fixed diameter flow channel to maintain pressure, making it difficult to dynamically adjust the compensation force according to the change of rotation angle.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A portable cryotherapy device with adjustable spray angle includes a nozzle, which includes an air inlet pipe, a ball hinge, a trigger, a locking element, and a nozzle. The spherical hinge includes a fixed spherical shell fixedly connected to one end of the air intake pipe, a corner spherical shell rotatably connected inside the fixed spherical shell, an elastic shell provided on the inner wall of the fixed spherical shell, an output pipe fixedly connected to the outer end of the corner spherical shell, an inner shell fixedly connected to the inner side of the input end of the fixed spherical shell, an elastic cavity provided inside the inner shell, and multiple magnetic pressure blocks slidably connected to the outside of the elastic cavity. The trigger includes a fixed ring fixedly connected to the outside of the output tube, and a bearing ring is provided on the outside of the fixed spherical shell. A movable rod is slidably connected inside the bearing ring. A telescopic connecting rod is hinged between the front end of the movable rod and the outside of the fixed ring. Buffer springs are provided between the two ends of the movable rod and the two sides of the bearing ring. Multiple extrusion blocks are slidably connected inside the bearing ring. A repulsive magnetic plate is fixedly connected to the bottom of the extrusion blocks. As a further description of the above technical solution: The movable rod has a double wedge-shaped surface in the middle, and the top two sides of the extrusion block are adapted to the shape of the double wedge-shaped surface. As a further description of the above technical solution: The inner end of the corner spherical shell abuts against the elastic shell, and a sealing ring is provided at the connection between the elastic cavity and the outer part of the inner shell. The rear end of the nozzle is threaded to the outside of the output tube. As a further description of the above technical solution: The locking component includes an extension rod fixedly connected to the other end of the movable rod and an outer ring fixedly connected to the outside of the intake pipe. The outer side of the extension rod is slidably connected to the inside of the outer ring. An inner ring is rotatably connected to the inside of the outer ring. Multiple locking cavities are opened in the circumferential direction of the inner ring. An extension post is fixedly connected to the top of the inner ring. A screw is rotatably connected to the inside of the extension post. A fastening nut is threaded onto the outside of the screw. As a further description of the above technical solution: The top of the outer ring has a movable cavity, the outer side of the screw is slidably connected inside the movable cavity, and the contact surface between the fastening nut and the outer side of the outer ring is roughened. As a further description of the above technical solution: The opening size of the locking cavity gradually decreases from the middle to both sides, and the maximum opening diameter of the locking cavity is slightly larger than that of the extension rod, while the minimum opening diameter is slightly smaller than that of the extension rod. As a further description of the above technical solution: The intake pipe includes a pipe body, the inside of which is provided with a sensing flow channel, and one end of the pipe body is shaped to match the shape of the fixed spherical shell. As a further description of the above technical solution: An infrared detector is installed on the outside of the air intake pipe. A front shell and a rear cover are installed on both sides of the infrared detector, and the air intake pipe is installed inside the front shell and the rear cover. A temperature controller is installed on the outside of the front shell. A sealing head is connected to the top of the front shell and the inlet end of the air intake pipe, and a nitrogen dioxide gasbag is sealed to the other end of the sealing head.
[0007] The present invention has the following beneficial effects: 1. In this invention, when the operator rotates the nozzle, the nozzle drives the output pipe to rotate, and the fixed ring on the outside of the output pipe moves synchronously. The fixed ring pushes the movable rod to slide within the bearing ring through a hinged telescopic connecting rod. The double wedge-shaped surface in the middle of the movable rod then squeezes the extrusion block, causing the extrusion block to drive the repulsive magnetic plate to move towards the spherical hinge. After the repulsive magnetic plate approaches, it generates a magnetic repulsion force with the magnetic pressure block, pushing the magnetic pressure block to squeeze the elastic cavity. The elastic cavity deforms under the pressure, and the cross-sectional area of the flow channel in its middle decreases. As the rotation angle of the spherical shell increases, the sliding amplitude of the movable rod increases, the magnetic repulsion force between the extrusion block and the repulsive magnetic plate and the magnetic pressure block becomes stronger, and the deformation of the elastic cavity becomes greater, thereby dynamically compensating for the pressure loss caused by the bend in the flow channel and ensuring the stability of gas pressure under different injection angles.
[0008] 2. In this invention, when the movable rod slides within the bearing ring, its extension rod at the other end moves synchronously within the outer ring of the locking member. After the nozzle spray angle is adjusted to the target angle, the inner ring is rotated to engage the extension rod in the locking cavity of the inner ring; then, the fastening nut is rotated to ensure close contact with the rough surface on the outer side of the outer ring, further reinforcing the angle locking state. Simultaneously, during the sliding of the movable rod, the buffer springs at both ends are compressed or stretched, and the telescopic connecting rod extends and retracts articulatedly with the movement of the movable rod. When the nozzle sprays, the elasticity of the buffer springs and the linkage structure of the telescopic connecting rod together buffer the spray reaction force, preventing the angle from shifting due to recoil and ensuring the stability of the locked angle. Attached Figure Description
[0009] Figure 1 This is a three-dimensional schematic diagram of a portable cryotherapy device with adjustable spray angle proposed in this invention. Figure 2 This is a schematic diagram of the infrared detector of a portable cryotherapy device with adjustable spray angle proposed in this invention. Figure 3 This is a schematic diagram of the nozzle structure of a portable cryotherapy device with adjustable spray angle proposed in this invention. Figure 4 This is a schematic diagram of the air inlet pipe of a portable cryotherapy device with adjustable spray angle proposed in this invention. Figure 5 This is a schematic diagram of the spherical hinge structure of a portable cryotherapy device with adjustable spray angle proposed in this invention. Figure 6 This is a schematic diagram of the trigger element of a portable cryotherapy device with adjustable spray angle proposed in this invention. Figure 7 This is a schematic diagram of the locking component of a portable cryotherapy device with adjustable spray angle proposed in this invention. Figure 8 for Figure 6 Enlarged view of point A in the middle.
[0010] Legend: 1. Front shell; 2. Rear cover; 3. Sealing head; 4. Nitrogen dioxide gasbag; 5. Temperature controller; 6. Infrared detector; 7. Nozzle; 71. Inlet pipe; 711. Pipe body; 712. Sensing flow channel; 72. Spherical hinge; 721. Fixed spherical shell; 722. Corner spherical shell; 723. Output pipe; 724. Elastic shell; 725. Inner shell; 726. Elastic cavity; 727. Sealing ring; 728. Magnetic pressure 73. Block; 731. Trigger; 732. Fixed ring; 733. Telescopic link; 734. Movable rod; 735. Buffer spring; 736. Bearing ring; 737. Pressing block; 738. Repulsive magnetic plate; 74. Locking element; 741. Extension rod; 742. Outer ring; 743. Movable cavity; 744. Inner ring; 745. Locking cavity; 746. Extension post; 747. Screw; 748. Fastening nut; 75. Nozzle. Detailed Implementation
[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0012] Reference Figures 1 to 8 The present invention provides an embodiment of a portable cryotherapy device with adjustable spray angle, comprising a nozzle 7. The nozzle 7 is the core spray execution component of the device, providing an integrated mounting base for the air inlet pipe 71, spherical hinge 72, trigger 73, locking member 74 and nozzle 75. It can accurately spray cryogenic nitrogen dioxide gas onto the treatment area and is the direct carrier for realizing the cryotherapy function. The nozzle 7 includes an air inlet pipe 71, spherical hinge 72, trigger 73, locking member 74 and nozzle 75.
[0013] The spherical hinge 72 includes a fixed spherical shell 721 fixedly connected to one end of the air intake pipe 71. The fixed spherical shell 721 provides a closed and stable rotation space for the corner spherical shell 722, and at the same time provides mounting support for components such as the elastic shell 724 and the inner shell 725. The corner spherical shell 722 is rotatably connected inside the fixed spherical shell 721. The corner spherical shell 722 drives the output pipe 723 and the nozzle 75 to change the spray direction synchronously by rotating around the fixed spherical shell 721. It is the key actuator for adjusting the spray angle of the nozzle 7. The inner wall of the fixed spherical shell 721 is provided with an elastic shell 724. 24. By abutting against the inner end of the corner spherical shell 722, the corner spherical shell 722 is elastically fitted during its rotation, which helps to enhance the sealing of the inside of the spherical hinge 72 and reduce the risk of gas leakage. The inner end of the corner spherical shell 722 abuts against the elastic shell 724. The outer end of the corner spherical shell 722 is fixedly connected to the output pipe 723. The output pipe 723 stably guides the nitrogen dioxide gas transmitted through the corner spherical shell 722 to the nozzle 75, thus establishing a gas transmission channel between the corner spherical shell 722 and the nozzle 75 to ensure directional gas delivery. The rear end of the nozzle 75 is threaded to the outside of the output pipe 723.
[0014] An inner shell 725 is fixedly connected to the inner side of the input end of the fixed spherical shell 721. The inner shell 725 provides a stable installation space and structural support for the elastic cavity 726, ensuring the stability of the elastic cavity 726 during use. The elastic cavity 726 is set inside the inner shell 725. The elastic cavity 726 adjusts the cross-sectional area of the internal flow channel by the deformation generated by its own compression, compensating for the pressure loss caused by the bending of the flow channel due to the rotation of the corner spherical shell 722, and maintaining the stability of the gas transmission pressure. A sealing ring 727 is set at the external connection between the elastic cavity 726 and the inner shell 725. The sealing ring 727 enhances the sealing between the elastic cavity 726 and the inner shell 725, effectively preventing nitrogen dioxide gas from leaking from the connection gap between the two. In addition, multiple magnetic pressure blocks 728 are slidably connected to the outside of the elastic cavity 726. The magnetic pressure blocks 728 move towards the elastic cavity 726 under the action of magnetic repulsion and compress the elastic cavity 726, providing a direct driving force for the deformation of the elastic cavity 726.
[0015] The locking component 74 includes an extension rod 741 fixedly connected to the other end of the movable rod 733. The extension rod 741 slides and adjusts its position with the movable rod 733, and can be engaged into the locking cavity 745, providing a direct locking fit structure for locking the nozzle 7 angle. It is also fixedly connected to an outer ring 742 outside the air inlet pipe 71. The outer ring 742 provides sliding space for the extension rod 741 and rotational support for the inner ring 744, ensuring stable installation and movement of all components of the locking component 74. The outer side of the extension rod 741 is slidably connected to the inside of the outer ring 742, and the inner ring 742 is rotatably connected to the inner ring 744. The inner ring 744 rotates to align the locking cavity 745 with the extension rod 741, facilitating the insertion of the extension rod 741. This is a key adjustment structure for angle locking. The inner ring 744 has multiple locking cavities 745 around its circumference. After the locking cavity 745 is inserted into the extension rod 741, its shape restricts the movement of the extension rod 741, ensuring that the nozzle 7 is not easily deviated after angle locking. The opening size of the locking cavity 745 gradually decreases from the middle to both sides, and the maximum opening diameter of the locking cavity 745 is slightly larger than that of the extension rod 741, while the minimum opening diameter is slightly smaller than that of the extension rod 741. An extension post 746 is fixedly connected to the top of the inner ring 744. The extension post 746 provides a stable installation space and rotational support for the screw 747, ensuring the stability of the screw 747's position during adjustment. The screw 747 is rotatably connected inside the extension post 746. The screw 747 adjusts the distance between the fastening nut 748 and the outer ring 742 by its own rotation, providing an adjustment basis for the fastening nut 748 to fit with the outer ring 742. The fastening nut 748 is connected to the external thread of the screw 747. After the fastening nut 748 comes into close contact with the outer side of the outer ring 742, it enhances the friction, further reinforcing the relative position of the inner ring 744 and the outer ring 742, and improving the stability of the angle locking. The top of the outer ring 742 is provided with a movable cavity 743. The movable cavity 743 provides sliding space for the screw 747 to rotate with the inner ring 744, avoiding the position of the screw 747 from restricting the rotation of the inner ring 744 and ensuring the flexibility of the inner ring 744 adjustment. The outer side of the screw 747 is slidably connected inside the movable cavity 743, and the contact surface between the fastening nut 748 and the outer side of the outer ring 742 is provided with a rough surface.
[0016] The locking component 74 includes an extension rod 741 fixedly connected to the other end of the movable rod 733. The extension rod 741 slides and adjusts its position with the movable rod 733, and can be engaged into the locking cavity 745, providing a direct locking fit structure for locking the nozzle 7 angle. It is also fixedly connected to an outer ring 742 outside the air inlet pipe 71. The outer ring 742 provides sliding space for the extension rod 741 and rotational support for the inner ring 744, ensuring stable installation and movement of all components of the locking component 74. The outer side of the extension rod 741 is slidably connected to the inside of the outer ring 742, and the inner ring 742 is rotatably connected to the inner ring 744. The inner ring 744 rotates to align the locking cavity 745 with the extension rod 741, facilitating the insertion of the extension rod 741. This is a key adjustment structure for angle locking. The inner ring 744 has multiple locking cavities 745 around its circumference. After the locking cavity 745 is inserted into the extension rod 741, its shape restricts the movement of the extension rod 741, ensuring that the nozzle 7 is not easily deviated after angle locking. The opening size of the locking cavity 745 gradually decreases from the middle to both sides, and the maximum opening diameter of the locking cavity 745 is slightly larger than that of the extension rod 741, while the minimum opening diameter is slightly smaller than that of the extension rod 741. An extension post 746 is fixedly connected to the top of the inner ring 744. The extension post 746 provides a stable installation space and rotational support for the screw 747, ensuring the stability of the screw 747's position during adjustment. The screw 747 is rotatably connected inside the extension post 746. The screw 747 adjusts the distance between the fastening nut 748 and the outer ring 742 by its own rotation, providing an adjustment basis for the fastening nut 748 to fit with the outer ring 742. The fastening nut 748 is connected to the external thread of the screw 747. After the fastening nut 748 comes into close contact with the outer side of the outer ring 742, it enhances the friction, further reinforcing the relative position of the inner ring 744 and the outer ring 742, and improving the stability of the angle locking. The top of the outer ring 742 is provided with a movable cavity 743. The movable cavity 743 provides sliding space for the screw 747 to rotate with the inner ring 744, avoiding the position of the screw 747 from restricting the rotation of the inner ring 744 and ensuring the flexibility of the inner ring 744 adjustment. The outer side of the screw 747 is slidably connected inside the movable cavity 743, and the contact surface between the fastening nut 748 and the outer side of the outer ring 742 is provided with a rough surface.
[0017] The intake pipe 71 includes a pipe body 711, which provides an installation carrier and structural support for the sensing channel 712, ensuring the overall structural strength of the intake pipe 71 and providing a basic framework for gas transmission. The sensing channel 712 is provided inside the pipe body 711, which provides a directional transmission path for nitrogen dioxide gas, making it easier to sense the gas flow status and providing a basis for gas transmission stability and subsequent monitoring. Furthermore, the shape of one end of the pipe body 711 is adapted to the shape of the fixed spherical shell 721.
[0018] An infrared detector 6 is installed on the outside of the air inlet pipe 71. The infrared detector 6 roughly measures the initial temperature of the treatment area and the temperature change during treatment, providing reference data for the temperature controller 5 to adjust the temperature and helping to ensure that the treatment is within the effective temperature range. A front shell 1 and a rear cover 2 are respectively installed on both sides of the infrared detector 6. The front shell 1 and the rear cover 2 provide physical protection for the internal components such as the air inlet pipe 71 and the infrared detector 6, preventing the components from being interfered with or damaged by the external environment. The air inlet pipe 71 is located inside the front shell 1 and the rear cover 2. The temperature controller 5 is installed on the outside of the front shell 1. The controller 5 sets the target treatment temperature, monitors the treatment temperature in real time, and adjusts the equipment operation status to maintain temperature stability, ensuring accurate and safe low-temperature treatment. The top of the front shell 1 is connected to the inlet end of the air inlet pipe 71 with a sealing head 3. The sealing head 3 seals the connection between the air inlet pipe 71 and the nitrogen dioxide gas bag 4 to prevent gas leakage at the connection and ensure the airtightness of gas transmission. The other end of the sealing head 3 is sealed to the nitrogen dioxide gas bag 4, which stores a sufficient amount of nitrogen dioxide gas to continuously provide a stable gas source for the treatment device, ensuring that low-temperature treatment can be carried out continuously.
[0019] Working principle: The nitrogen dioxide gasbag 4 is sealed and connected to the inlet end of the air inlet pipe 71 through the sealing head 3, and the nozzle 75 is installed on the output pipe 723. The temperature controller 5 on the outside of the front shell 1 is operated to set the target treatment temperature, and the spray angle of the nozzle 7 is adjusted to the angle suitable for the treatment area. The device is started, so that nitrogen dioxide flows out from the gasbag, passes through the air inlet pipe 71, the spherical hinge 72 and other structures, and is sprayed out from the nozzle 75 to implement low temperature treatment. During the treatment, the temperature controller 5 monitors and adjusts the temperature, and the infrared detector 6 continuously monitors the temperature of the treatment area to ensure that the treatment is carried out within the effective temperature range.
[0020] When it is necessary to adjust the spray angle of nozzle 7, the operator first manually rotates nozzle 75. Since the rear end of nozzle 75 is fixedly installed outside output pipe 723, and output pipe 723 is fixedly connected to corner spherical shell 722, corner spherical shell 722 will rotate synchronously inside fixed spherical shell 721 to adjust the spray angle of nozzle 7. Furthermore, the rotation of spherical shell will not drive the rotation of inner shell 725, thereby keeping the elastic cavity 726 inside inner shell 725 stationary. This prevents pressure loss of nitrogen dioxide gas before it reaches output pipe 723 due to changes in output angle. Moreover, the elastic cavity 726, through its elastic properties, always adheres tightly to the rotating spherical shell, and the sealing ring 727 prevents nitrogen dioxide gas leakage during rotation.
[0021] When the nozzle 75 drives the output pipe 723 to rotate, the fixing ring 731 on the outside of the output pipe 723 moves accordingly. Since the other end of the telescopic link 732 is hinged to the end of the movable rod 733, the output pipe 723 can rotate freely and drive the multiple hinged telescopic links 732 to move accordingly, thereby pushing the movable rod 733 to slide back and forth in the bearing ring 735. When the movable rod 733 slides, the double wedge surface in its middle will squeeze the squeezing block 736, causing the squeezing block 736 to drive the repulsive magnetic plate 737 to move towards the spherical hinge 72. At the same time, the buffer springs 734 at both ends of the movable rod 733 will be compressed or stretched due to the sliding of the movable rod 733, thereby providing the reset power and the buffer elastic force to provide the nozzle 75 with the reverse thrust during the spraying process after the angle is fixed, thus ensuring the stability of the nozzle 75 after the angle is adjusted and the ease of reset.
[0022] When the repulsive magnetic plate 737 moves toward the spherical hinge 72, it generates a magnetic repulsive force with the magnetic pressure block 728, pushing the magnetic pressure block 728 to squeeze the elastic cavity 726. The elastic cavity 726 deforms under compression, reducing the cross-sectional area of the flow channel in the middle of the elastic cavity 726, thereby increasing the pressure of the flowing fluid. This compensates for the pressure loss caused by the bending of the flow channel due to the rotation of the corner spherical shell 722. Furthermore, the larger the rotation angle, the greater the deformation of the elastic cavity 726, and the greater the compensation pressure, thereby achieving dynamic balance of pressure loss.
[0023] Simultaneously, when the movable rod 733 slides, its other end extension rod 741 will slide inside the outer ring 742 of the locking member 74. When the spray angle is adjusted to the target angle, rotate the inner ring 744 to make the extension rod 741 engage with the locking cavity 745. Since the opening size of the locking cavity 745 gradually decreases from the middle to both sides, the extension rod 741 will be stably locked inside the locking cavity 745. Then rotate the fastening nut 748 to make the fastening nut 748 make close contact with the rough surface on the outside of the outer ring 742, further strengthening the locking state and ensuring that the nozzle 7 remains stable at the adjusted angle.
[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A portable cryogenic therapy device with adjustable spray angle comprising a spray head (7), characterized in that: The spray head (7) comprises an air inlet pipe (71), a spherical hinge (72), a trigger (73), a locking piece (74) and a nozzle (75); The spherical hinge (72) comprises a fixed spherical shell (721) fixedly connected to one end of the air inlet pipe (71), a corner spherical shell (722) rotatably connected to the inside of the fixed spherical shell (721), an elastic shell (724) arranged on the inner wall of the fixed spherical shell (721), an output pipe (723) fixedly connected to the outer end of the corner spherical shell (722), an inner shell (725) fixedly connected to the inner side of the input end of the fixed spherical shell (721), an elastic cavity (726) arranged in the inside of the inner shell (725), and a plurality of magnetic pressing blocks (728) slidably connected to the outside of the elastic cavity (726). The trigger (73) comprises a fixed ring (731) fixedly connected to the outside of the output pipe (723), a bearing ring (735) arranged on the outside of the fixed spherical shell (721), an active rod (733) slidably connected to the inside of the bearing ring (735), an extension link (732) hingedly connected between the front end of the active rod (733) and the outside of the fixed ring (731), a buffer spring (734) arranged between the two ends of the active rod (733) and the two sides of the bearing ring (735), a plurality of extrusion blocks (736) slidably connected to the inside of the bearing ring (735), and repulsive magnetic plates (737) fixedly connected to the bottom of the extrusion blocks (736).
2. The portable low-temperature therapeutic instrument with adjustable spray angle according to claim 1, characterized in that: The middle part of the active rod (733) is provided with a double-wedge surface, and the top ends of the extrusion blocks (736) are shaped to be adapted to the shape of the double-wedge surface.
3. The portable low-temperature therapeutic instrument with adjustable spray angle according to claim 1, characterized in that: The inner end of the corner spherical shell (722) abuts against the elastic shell (724), a sealing ring (727) is arranged at the connection between the elastic cavity (726) and the outside of the inner shell (725), and the rear end of the nozzle (75) is threadedly connected to the outside of the output pipe (723).
4. The portable cryogenic therapy unit of claim 1, wherein: The locking piece (74) comprises an extension rod (741) fixedly connected to the other end of the active rod (733) and an outer ring (742) fixedly connected to the outside of the air inlet pipe (71), the outer side of the extension rod (741) is slidably connected to the inside of the outer ring (742), the inside of the outer ring (742) is rotatably connected to an inner ring (744), a plurality of locking cavities (745) are formed in the circumferential direction of the inner ring (744), an extension post (746) is fixedly connected to the top of the inner ring (744), a screw (747) is rotatably connected to the inside of the extension post (746), and a fastening nut (748) is threadedly connected to the outside of the screw (747).
5. The portable cryogenic therapy unit of claim 4, wherein: An active cavity (743) is formed in the top of the outer ring (742), the outer side of the screw (747) is slidably connected to the inside of the active cavity (743), and the contact surface between the fastening nut (748) and the outside of the outer ring (742) is provided with a rough surface.
6. The portable cryotherapy device of claim 4, wherein: The opening size of the locking cavity (745) gradually decreases from the middle to the two sides, and the maximum opening diameter of the locking cavity (745) is slightly larger than the extension rod (741), and the minimum opening diameter is slightly smaller than the extension rod (741).
7. The portable cryotherapy instrument with adjustable spray angle according to claim 1, characterized in that: The air inlet pipe (71) comprises a pipe body (711), an induction flow channel (712) is arranged in the pipe body (711), and one end of the pipe body (711) is shaped to be matched with a fixed spherical shell (721).
8. The portable cryotherapy device of claim 1, wherein: The outer side of the air inlet pipe (71) is provided with an infrared detector (6), the two sides of the infrared detector (6) are respectively provided with a front shell (1) and a rear cover (2), the air inlet pipe (71) is arranged in the front shell (1) and the rear cover (2), the outer side of the front shell (1) is provided with a temperature regulator (5), the top end of the front shell (1) and the inlet end of the air inlet pipe (71) are connected with a sealing head (3), and the other end of the sealing head (3) is sealingly connected with a nitrogen dioxide gas bag (4).