CN113693703B

CN113693703B - Advancing mechanism and cryotherapy appearance of cryotherapy appearance

Info

Publication number: CN113693703B
Application number: CN202110934724.3A
Authority: CN
Inventors: 虞鼎峰
Original assignee: Ningbo Shun Shun Medical Equipment Co ltd
Current assignee: Ningbo Shun Shun Medical Equipment Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-08-12
Anticipated expiration: 2041-08-16
Also published as: CN113693703A

Abstract

The invention relates to the technical field of medical instruments and discloses a propulsion mechanism of a cryotherapeutic apparatus and the cryotherapeutic apparatus, wherein the propulsion mechanism comprises: the device comprises a shell, a first check structure and an internal thread, wherein an installation cavity for installing a flow storage bottle is arranged in the shell, a communication hole communicated with the installation cavity is formed in the tail of the shell, the first check structure and the internal thread are arranged on the inner wall of the shell, and the internal thread is positioned in the communication hole; the pushing knob is movably arranged at the communication hole and comprises a pushing part, a connecting part and a rotating part which are sequentially connected, wherein the connecting part is provided with an external thread, and the external thread is connected with the internal thread; the pushing part is movably arranged in the mounting cavity in a penetrating manner and can push the flow storage bottle to move forwards, the pushing part is provided with a plurality of second non-return structures along the circumferential direction of the pushing part, and the first non-return structures are movably abutted against the second non-return structures; the rotating part is protruded out of the shell. The cryotherapeutic apparatus has the advantages of small volume, convenient use, high safety performance and high precision.

Description

Propelling mechanism of cryotherapy apparatus and cryotherapy apparatus

Technical Field

The invention relates to the technical field of medical instruments, in particular to a propelling mechanism of a cryotherapy apparatus and the cryotherapy apparatus.

Background

Cryotherapy is a medical device that uses physical methods to destroy or ablate human tissue using cryogenic substances and cryoinstruments to achieve the goal of treating disease. The cooling medium adopted by most hospitals at present is liquid nitrogen.

When doctors in low-level hospitals use liquid nitrogen for cryotherapy, a stainless steel heat-insulating container is firstly used for going to a liquid nitrogen storage point of the hospitals to contain a certain amount of liquid nitrogen, then medical cotton swabs are used for dipping the liquid nitrogen, the liquid nitrogen is smeared on the body part of a patient needing therapy, the smearing is repeated for 2-3 times, and when the doctor is not used for a long time, the liquid nitrogen needs to be safely disposed in time.

When doctors in middle and upper hospitals use liquid nitrogen for cryotherapy, professional liquid nitrogen cryotherapy devices are used, but the liquid nitrogen cryotherapy devices have corresponding disadvantages, and have large sizes and are difficult to hold by one hand. Similarly, the liquid storage tank is used to go to a liquid nitrogen storage point of a hospital to contain a certain amount of liquid nitrogen, and then the liquid nitrogen is used.

Thus, portable cryotherapeutic devices are available. An apparatus for dispensing a cryogenic fluid, as disclosed in patent "US 20110152850a 1", includes a container including a reservoir containing the cryogenic fluid, a flow passage configured to receive the cryogenic fluid from the reservoir, a valve assembly, and a dispensing head. In the device, when the device is needed to be used, the cam structure pushes the reservoir to advance by outwards rotating the starting rod, so that the reservoir is punctured and conducted; when the device is needed to be used, the starting rod is outwards rotated to conduct the whole device, and then the cryotherapy can be carried out. When the actuator lever is rotated outwardly after the reservoir is pierced, the reservoir tends to back out, which, if it does, can easily cause the nozzle to suddenly shut off, which can seriously affect the procedure.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a propulsion mechanism of a cryotherapeutic apparatus and the cryotherapeutic apparatus, which have the advantages of small volume, convenience in use and high safety performance.

The technical scheme adopted by the invention for solving the technical problems is to provide a propelling mechanism of a cryotherapeutic apparatus, which comprises:

the device comprises a shell, a first check structure and an internal thread, wherein an installation cavity for installing a flow storage bottle is arranged in the shell, a communication hole communicated with the installation cavity is formed in the tail of the shell, the first check structure and the internal thread are arranged on the inner wall of the shell, and the internal thread is positioned in the communication hole;

the pushing knob is movably arranged at the communication hole and comprises a pushing part, a connecting part and a rotating part which are sequentially connected, wherein the connecting part is provided with an external thread, and the external thread is connected with the internal thread; the pushing part is movably arranged in the mounting cavity in a penetrating mode and can push the flow storage bottle to move forwards, the pushing part is provided with a plurality of second non-return structures along the circumferential direction of the pushing part, and the first non-return structures are movably abutted to the second non-return structures; the rotating part is protruded out of the shell.

Furthermore, the first non-return structure is a non-return rib and is convexly arranged on the inner wall of the shell; the second non-return structure is a non-return convex strip which is convexly arranged on the outer wall of the pushing part.

Furthermore, the check convex strips comprise a plurality of first check convex strips and a plurality of second check convex strips, one ends of the first check convex strips and the second check convex strips are connected with the connecting part, and the other ends of the first check convex strips and the second check convex strips extend to the axial direction of the abutting part along the outer wall of the abutting part;

the length of first non return sand grip is greater than the length of second non return sand grip, two be equipped with at least one between the first non return sand grip second non return sand grip.

Further, both the first check convex strip and the second check convex strip comprise a guide inclined wall and a locking straight wall, and when the rotating part is rotated, the guide inclined wall pushes the check rib; when the rotating part stops rotating, the check rib abuts against the locking straight wall.

Furthermore, the outer surface of the pushing part is provided with a cylindrical surface, the locking straight wall is perpendicular to the cylindrical surface, an included angle between the guide inclined wall and the cylindrical surface is an acute angle, and one end of the guide inclined wall, which is far away from the locking straight wall, is connected to the cylindrical surface.

Further, when the pushing knob is rotated clockwise, the pushing portion moves forward, and the second check structure extrudes the first check structure.

Furthermore, the shell comprises a first shell and a second shell which are connected, and the first shell and the second shell are both provided with the check rib;

the non-return ribs on the first shell and the non-return ribs on the second shell are arranged in a rotational center symmetry mode.

Furthermore, the sectional area of non return muscle is from last to increasing gradually down.

Furthermore, an arc surface is arranged at one end, far away from the connecting part, of the pushing part, and when the flow storage bottle is installed in the installation cavity, the arc surface abuts against the tail part of the flow storage bottle.

Furthermore, the pushing knob is provided with a through hole which sequentially penetrates through the rotating part, the connecting part and the pushing part, and the through hole penetrates through the cambered surface.

Further, the internal thread and the external thread are both saw-tooth threads.

Furthermore, the rotating part is arranged in a circular truncated cone shape, and the sectional area of the rotating part is gradually increased from one end far away from the connecting part to one end close to the connecting part;

the periphery of rotating portion is equipped with a plurality of first recesses that are the interval setting along its self circumference.

The technical scheme adopted by the invention for solving the technical problems is to provide a freezing therapeutic apparatus, which is characterized by comprising the following components:

the propulsion mechanism of the cryotherapeutic apparatus;

the flow storage bottle is arranged in the mounting cavity, one end of the flow storage bottle abuts against the abutting part, and a bottle opening of the flow storage bottle is positioned at one end far away from the abutting part;

the switch assembly is arranged in the installation cavity and comprises a switch seat, a valve needle, a switch valve, a reset elastic sheet and an injection pipe, the switch seat is clamped in the shell, and a first flow channel is arranged on the switch seat; the valve needle is arranged in the first flow channel and communicated with the first flow channel, when the pushing knob is rotated, the flow storage bottle moves forwards, and the valve needle can pierce through the bottle opening of the flow storage bottle and is communicated with the flow storage bottle; the switch valve is movably arranged on the switch seat, a second flow channel is arranged on the switch valve, a switch key for driving the switch valve is arranged on the shell, and the switch key can drive the second flow channel to be communicated with the first flow channel; the reset elastic sheet is arranged on the switch seat and movably abutted against the switch valve; the injection pipe is arranged in the second flow channel, a nozzle is arranged at one end, far away from the propelling knob, of the shell, and one end, far away from the switch valve, of the injection pipe penetrates through the nozzle.

Furthermore, a first limiting part is arranged on the switch seat, a second limiting part is arranged on the switch valve, and when the second flow channel is communicated with the first flow channel, the second limiting part abuts against the first limiting part.

Furthermore, two sliding blocks extend outwards from two sides of the switch seat respectively, two sliding grooves are formed in the switch valve, one sliding block is arranged in one sliding groove, and the other sliding block is arranged in the other sliding groove;

the first limiting part and the second limiting part are used for limiting the sliding distance of the sliding block along the sliding groove.

Furthermore, a second groove is formed in one end, close to the switch valve, of the switch seat, a sealing ring is arranged in the second groove, and the switch valve movably abuts against the sealing ring.

Furthermore, a filter element is arranged in the second flow passage.

Furthermore, the switch key and the shell are integrally formed, one end of the switch key is connected with the shell, the other end of the switch key is a free end, and the free end is pressed to drive the switch valve.

Furthermore, a driving block protrudes from the middle of the switch key to the side of the switch valve, the driving block is located above the switch valve, and when the switch key is pressed, the driving block pushes the switch valve.

Furthermore, an arc-shaped groove is formed in the connection position of the switch key and the shell.

Compared with the prior art, the invention has at least the following beneficial effects:

according to the invention, the tail part of the cryotherapy apparatus is provided with the propelling mechanism, the rotating part of the propelling knob is rotated clockwise, and the internal thread on the connecting part is matched with the thread on the shell, so that the propelling knob is propelled forwards, namely the pushing part of the propelling knob is pushed forwards, and the flow storage bottle moves forwards and is pierced by the valve needle and is conducted. In the whole use, the pushing part is propped against the tail part of the flow storage bottle to prevent the flow storage bottle from retreating, so that the condition of flow cutoff of the cryotherapy apparatus in the use process can be effectively avoided, smooth operation is ensured, and the safety performance is high. Because the supporting portion is provided with a plurality of check convex strips along the circumferential direction, the first shell and the second shell are provided with check ribs, when the pushing knob is not rotated, the check ribs are supported on the locking straight wall of the check convex strips, the pushing knob is reversely (anticlockwise) locked, when the flow storage bottle has a retreating trend, the pushing knob can be effectively prevented from retreating due to the check effect of the check ribs and the check convex strips, and then the situation that the flow storage bottle retreats is prevented. The two check ribs are arranged in central symmetry, the anti-reversion effect is good, and when one side is damaged, the check function is not influenced; when the pushing knob is rotated clockwise, the check rib slides along the guide inclined wall due to the guide inclined wall arranged on the check rib, so that the blocking feeling is small. In the front section of piercing, because non-return can be not needed, and a good non-return effect is needed after piercing, the non-return convex strips are provided with a condition that long first non-return convex strips and short second non-return convex strips are arranged at intervals, and in the front section, the distance between two adjacent non-return convex strips is large, so that the pushing retardation sense is smaller; during the back end, the interval of two adjacent non-return convex strips is small, and the non-return effect is better. The through hole on the pushing knob can ensure that the pushing knob cannot be pushed forwards continuously due to the fact that air is held out and the pressure of the installation cavity is increased when the pushing knob is pushed. And the matching propulsion action of the internal thread and the external thread can accurately control the propulsion distance of the flow storage bottle, thereby realizing the precision of the cryotherapy apparatus.

Drawings

FIG. 1 is a schematic view of the overall structure of the cryotherapeutic apparatus of the present invention;

FIG. 2 is an exploded view of the propulsion mechanism;

FIG. 3 is a schematic view of the structure of FIG. 2 from another perspective;

FIG. 4 is a schematic view of the pushing knob;

FIG. 5 is a schematic view in half section of the push knob;

FIG. 6 is a schematic half-sectional view of the cryotherapeutic apparatus;

FIG. 7 is a schematic view of the cryotherapeutic apparatus with the first housing removed;

FIG. 8 is a schematic half-section view of the switch assembly;

FIG. 9 is an exploded view of the switch assembly;

fig. 10 is a schematic structural view of fig. 9 from another angle.

In the figure:

1. a housing; 10. a first housing; 11. a second housing; 12. a nozzle; 100. a mounting cavity; 101. switching a key; 1011. a drive block; 1012. an arc-shaped slot; 110. a communicating hole; 120. a first non-return structure; 130. an internal thread;

2. a push knob; 20. a pushing part; 201. a second non-return structure; 202. a cambered surface; 201A, a first check convex strip; 201B, a second check convex strip; 2011. a guide inclined wall; 2012. a locking straight wall; 21. a connecting portion; 210. an external thread; 22. a rotation part; 220. a first groove; 23. a through hole;

3. a flow storage bottle;

4. a switch assembly; 40. a switch base; 41. a valve needle; 42. an on-off valve; 43. resetting the elastic sheet; 44. an injection pipe; 45. a seal ring; 46. a filter element; 47. a self-locking nut; 401. a first flow passage; 402. a first limiting part; 403. a slider; 404. a second groove; 421. a second flow passage; 422. a second limiting part; 423. a chute.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

Moreover, descriptions of the present invention as relating to "first," "second," "a," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating a number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "connected", "fixed", and the like are to be understood broadly, for example, "fixed" may be fixedly connected, may be detachably connected, or may be integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1-3, a propulsion mechanism of a cryotherapeutic apparatus comprises: the device comprises a shell 1, wherein an installation cavity 100 for installing a flow storage bottle 3 is arranged in the shell 1, namely the shell 1 is hollow and provides an installation space for internal parts of the cryotherapeutic apparatus; a communicating hole 110 communicated with the mounting cavity 100 is formed at the tail part of the housing 1, a first check structure 120 and an internal thread 130 are formed on the inner wall of the housing 1, and the internal thread 130 is positioned in the communicating hole 110; the push knob 2 is movably arranged at the communication hole 110 and comprises a push part 20, a connecting part 21 and a rotating part 22 which are sequentially connected, namely, the push part 20, the connecting part 21 and the rotating part 22 are integrally arranged, for example, when the push knob 2 is made of plastic, the push part 20, the connecting part 21 and the rotating part 22 can be integrally formed by injection molding; an external thread 210 is arranged on the connecting part 21, and the external thread 210 is connected with the internal thread 130; the internal thread 130 and the external thread 210 are both zigzag threads, and compared with triangular threads, rectangular threads and trapezoidal threads, the zigzag threads can ensure good transmission effect and ensure that the driving force when the push knob 2 is rotated does not need to be too large. The pushing portion 20 is movably arranged in the mounting cavity 100 in a penetrating mode, the pushing portion 20 can push the flow storage bottle 3 to move forwards, the rotating portion 22 can be directly driven by a user, the rotating portion 22 drives the connecting portion 21 to rotate, external threads 210 on the connecting portion 21 are matched with internal threads 130 on the tail portion of the shell 1, the connecting portion 21 and the pushing portion 20 move forwards, the pushing portion 20 directly acts on the flow storage bottle 3, the pushing portion 20 is always kept attached to the flow storage bottle 3, the flow storage bottle 3 is limited to move backwards, safety performance is high, corresponding scales can be arranged on the rotating portion 22 through matching of the internal threads and the external threads, the advancing distance of the pushing knob 2 is accurately controlled, and the advancing distance of the flow storage bottle 3 is accurately controlled. The rotating part 22 protrudes out of the shell 1, which is convenient for manual operation. The pushing part 20 is provided with a plurality of second non-return structures 201 along the circumferential direction thereof, the first non-return structures 120 movably push against the second non-return structures 201, that is, when the pushing knob 2 is rotated in the forward direction (clockwise direction in this embodiment), the flow storage bottle 3 can be driven to advance, and the pushing knob 2 is limited to rotate in the reverse direction (counterclockwise direction in this embodiment), so that the situation that the flow storage bottle 3 retreats is always avoided, the position of the flow storage bottle 3 is kept reliable, and the safety performance is high.

As shown in fig. 2 to 5, the first non-return structure 120 is a non-return rib protruding on the inner wall of the housing 1; the second non-return structure 201 is a non-return convex strip, and is convexly arranged on the outer wall of the pushing portion 20. In the process of rotating the pushing knob 2, the check ribs are switched on different check convex strips. Wherein, the non return sand grip is including many first non return sand grip 201A and many second non return sand grip 201B, first non return sand grip 201A and second non return sand grip 201B both one end with connecting portion 21 links to each other, and first non return sand grip 201A and second non return sand grip 201B's starting point is close on the coplanar promptly, guarantees first non return sand grip 201A and second non return sand grip 201B's intensity height, and convenient the manufacturing. The other ends of the first non-return convex strip 201A and the second non-return convex strip 201B extend along the outer wall of the abutting portion 20 to the axial direction of the abutting portion 20; and the length of first non-return convex strip 201A is greater than the length of second non-return convex strip 201B, two be equipped with at least one between the first non-return convex strip 201A second non-return convex strip 201B.

In the using process, in the front section of the flow storage assembly 3, because the non-return significance is not large, the non-return effect is not needed, and the good non-return effect is needed after the penetration, the non-return convex strips are provided with the condition that the long first non-return convex strips 201A and the short second non-return convex strips 201B are arranged at intervals, and in the front section, the distance between two adjacent non-return convex strips is large, and the pushing retarding sense is smaller; and when the back section is used, the distance between two adjacent non-return ribs is small, and the non-return effect is better.

Specifically, both the first non-return convex strip 201A and the second non-return convex strip 201B include a guide inclined wall 2011 and a locking straight wall 2012, and when the rotating part 22 is rotated, the guide inclined wall 2011 pushes the non-return convex strip; when the rotating part 22 stops rotating, the check rib abuts against the locking straight wall 2012. The outer surface of the pushing portion 20 is provided with a cylindrical surface, the locking straight wall 2012 is perpendicular to the cylindrical surface, an included angle between the guiding inclined wall 2011 and the cylindrical surface is an acute angle, and one end of the guiding inclined wall 2011, which is far away from the locking straight wall 2012, is connected to the cylindrical surface. Namely, when the pushing knob 2 is rotated, the check rib on the housing 1 is switched between different check convex strips. The inclined guide wall 2011 can reduce the blocking feeling of rotating the pushing knob 2, and the locking straight wall 2012 can ensure that the check convex strip and the check rib are reliably abutted and are not easy to separate. Wherein, the sectional area of non return muscle is from last crescent to down, when rotating propulsion knob 2, the extruded top that is the non return muscle of non return sand grip, and the non return muscle protrusion is on casing 1, is equivalent to spiral arm beam structure, and when its shearing force that receives is great, the condition that the root splits appears easily, so set the non return muscle to the structure that the top is little, the bottom is big, the power when guaranteeing to impel knob 2 extrusion non return muscle need not be very big, and guarantees that the structural strength of non return muscle is reliable.

As shown in fig. 4-5, an arc surface 202 is disposed at an end of the pushing portion 20 away from the connecting portion 21, and when the flow storage bottle 3 is installed in the installation cavity 100, the arc surface 202 abuts against a tail portion of the flow storage bottle 3, so as to increase a contact area therebetween. And the pushing knob 2 is provided with a through hole 23 which sequentially penetrates through the rotating part 22, the connecting part 21 and the pushing part 20, and the through hole 23 penetrates through the cambered surface 202. In the using process, the through hole 23 on the pushing knob 2 can ensure that the pushing knob 2 cannot be pushed forward due to suffocation and increased pressure of the installation cavity 100 when the pushing knob 2 is pushed.

It should be noted that, in the present embodiment, when the pushing knob 2 is rotated in the clockwise direction, the abutting portion 20 moves forward, and the second check structure 201 presses the first check structure 120. Under the mutual abutting action of the first non-return structure 120 and the second non-return structure 201, the pushing knob 2 cannot rotate counterclockwise, that is, the abutting portion 20 can only move forward and cannot move backward, thereby ensuring that the flow storage bottle 3 cannot move backward.

The shell body 1 comprises a first shell 10 and a second shell 11 which are connected, the first shell 10 and the second shell 11 are arranged in half and surround to form the shell body 1, and the shell body 1 is integrally of a pen-shaped structure and is convenient for an operator to hold. The first shell 10 and the second shell 11 are both provided with the check rib; and the non-return rib on the first shell 10 and the non-return rib on the second shell 11 are arranged in a rotational center symmetry manner, so that the balance of the pushing reaction force borne by the pushing knob 2 is ensured, and when a single non-return rib is deformed or damaged, another non-return rib can also continuously ensure that the pushing knob 2 does not retreat, and the safety performance is high. The rotating part 22 is arranged in a circular truncated cone shape, and the sectional area of the rotating part 22 is gradually increased from one end far away from the connecting part 21 to one end close to the connecting part 21; the periphery of rotating portion 22 is equipped with a plurality of first recesses 220 that are the interval setting along its self circumference, and the setting of first recess 220 makes things convenient for operator's finger to rotate rotating portion 22.

In practical use, the propulsion mechanism is arranged at the tail of the cryotherapeutic apparatus, the rotating portion 22 of the propulsion knob 2 is rotated clockwise, the internal thread 130 on the connecting portion 21 and the thread on the housing 1 are matched with each other, so that the propulsion knob 2 is propelled forward, that is, the pushing portion 20 of the propulsion knob 2 is pushed forward, and the fluid storage bottle 3 moves forward, and is pierced by the valve needle 41 and is conducted. And the matching propulsion action of the internal thread and the external thread can accurately control the propulsion distance of the flow storage bottle 3, thereby realizing the precision of the cryotherapy apparatus. In the whole use process, the pushing part 20 is pushed against the tail part of the flow storage bottle 3 to prevent the flow storage bottle from retreating, so that the condition of flow breaking of the cryotherapeutic apparatus in the use process can be effectively avoided, smooth operation is ensured, and the safety performance is high. Because it has set up many non return sand grips along its circumference on supporting pushing away portion 20, all set up the non return muscle on first shell 10 and the second shell 11, when not rotating and impel knob 2, the non return muscle supports on the straight wall 2012 of locking of non return sand grip, will impel knob 2 and carry out reverse (anticlockwise) locking, when storage bottle 3 has the trend of retreating, because the non return effect of non return muscle and non return sand grip, can prevent effectively that impel knob 2 to retreat, and then the circumstances that the realization prevented storage bottle 3 from retreating appears. The two check ribs are arranged in central symmetry, the anti-reversion effect is good, and when one side is damaged, the check function is not influenced; when the push knob 2 is rotated clockwise, the check rib slides along the guide inclined wall 2011 due to the guide inclined wall 2011 arranged on the check rib, so that the blocking feeling is small.

Example two:

as shown in fig. 6-10, a cryotherapeutic apparatus comprises: the propulsion mechanism of the cryotherapeutic apparatus; the flow storage bottle 3 is arranged in the mounting cavity 100, one end of the flow storage bottle 3 abuts against the abutting part 20, namely the tail part of the flow storage bottle 3 abuts against the abutting part 20, the mouth of the flow storage bottle 3 is positioned at one end far away from the abutting part 20, gases such as nitrous oxide and carbon dioxide can be contained in the flow storage bottle 3 and used for cryotherapy, and the flow storage bottle 3 can adopt a disposable packaging gas steel bottle; the switch assembly 4 is arranged in the installation cavity 100 and comprises a switch seat 40, a valve needle 41, a switch valve 42, a reset spring sheet 43 and an injection pipe 44, wherein the switch seat 40 is clamped in the shell 1, and a first flow channel 401 is arranged on the switch seat 40; the valve needle 41 is arranged in the first flow channel 401 and is communicated with the first flow channel 401, when the pushing knob 2 is rotated, the flow storage bottle 3 moves forwards, and the valve needle 41 can pierce the bottle mouth of the flow storage bottle 3 and is communicated with the flow storage bottle 3; wherein, the valve needle 41 is a conical valve needle, which is simple to pierce the flow storage bottle 3; the switch valve 42 is movably arranged on the switch seat 40, a second flow channel 421 is arranged on the switch valve 42, a switch button 101 for driving the switch valve 42 is arranged on the housing 1, and the switch button 101 can drive the second flow channel 421 to be communicated with the first flow channel 401; in the using process, in a natural state, the first flow passage 401 and the second flow passage 421 are in a non-conducting state, that is, the fluid in the fluid storage bottle 3 does not flow out, when the user needs to use, the switch button 101 is pressed to conduct the first flow passage 401 and the second flow passage 421, and the fluid in the fluid storage bottle 3 can sequentially pass through the valve needle 41, the first flow passage 401 and the second flow passage 421, and is ejected from the ejection tube 44 to act on the to-be-treated part of the patient; the reset elastic sheet 43 is arranged on the switch seat 40 and movably abutted against the switch valve 42, when the first flow channel 401 and the second flow channel 421 are communicated, the reset elastic sheet 43 deforms due to the fact that the switch key 101 is pressed, when the switch key 101 is released, the reset elastic force of the reset elastic sheet 43 enables the switch valve 42 to reset, and the first flow channel 401 and the second flow channel 421 are not communicated; the injection pipe 44 is arranged in the second flow passage 421, a nozzle 12 is arranged at one end of the housing 1 far away from the pushing knob 2, and one end of the injection pipe 44 far away from the switch valve 42 is arranged in the nozzle 12 in a penetrating manner.

The switch button 101 and the housing 1 are integrally formed, and can be integrally injection-molded, one end of the switch button 101 is connected to the housing 1, the other end of the switch button 101 is a free end, and the free end is pressed to drive the switch valve 42. That is, in the using process, pressing the free end corresponds to that the free end rotates relative to the end of the switch button 101 far away from the free end, and then pushes the switch valve 42, so that the second flow channel 421 is communicated with the first flow channel 401. The switch knob 101 and the housing 1 are integrally formed, so that the overall structure is simplified, the number of parts is reduced, and a die for manufacturing the switch knob 101 does not need to be newly opened. Specifically, a driving block 1011 protrudes from the middle of the switch button 101 toward the switch valve 42, the driving block 1011 is located above the switch valve 42, and when the switch button 101 is pressed, the driving block 1011 pushes against the switch valve 42. The action part of the switch button 101 directly acting on the switch valve 42 is the driving block 1011, and the free end is not positioned at the driving block 1011 but extends to a farther position, so that the length of the force arm of the switch button 101 can be increased, and the force required for driving the switch valve 42 is reduced; the switch button 101 is equipped with an arc groove 1012 in the junction with casing 1, and in a similar way, the setting of arc groove 1012 can reduce the power of pressing switch button 101, can also avoid switch button 101 to appear stress concentration and fracture.

As shown in fig. 8 to 10, a first limiting portion 402 is disposed on the switch base 40, a second limiting portion 422 is disposed on the switch valve 42, and when the second flow channel 421 is communicated with the first flow channel 401, the second limiting portion 422 abuts against the first limiting portion 402. The interaction between the first position-limiting part 402 and the second position-limiting part 422 ensures that the switch valve 42 will not be separated from the switch base 40 after the switch button 101 is pressed to the bottom, and the first flow channel 401 and the second flow channel 421 are conducted to each other at the bottom position, without manually controlling the pressing distance of the switch button 101. Two sliding blocks 403 extend outwards from two sides of the switch base 40, two sliding grooves 423 are arranged on the switch valve 42, one sliding block 403 is arranged in one sliding groove 423, and the other sliding block 403 is arranged in the other sliding groove 423; the first and second limiting

portions

402 and 422 are used for limiting the sliding distance of the sliding block 403 along the sliding groove 423. A second groove 404 is formed in one end, close to the switch valve 42, of the switch base 40, a sealing ring 45 is arranged in the second groove 404, and the switch valve 42 movably abuts against the sealing ring 45. The gasket 45 prevents fluid from leaking from the interface between the first channel 401 and the second channel 421. A filter element 46 is further arranged in the second flow channel 421, and the filter element 46 is a PP cotton filter element, so that the fluid which is led to the skin of the patient is clean fluid.

In the using process, when the cryotherapy apparatus needs to be used, the pushing knob 2 is rotated clockwise, the pushing knob 2 pushes against the flow storage bottle 3, and after the certain position is reached, the valve needle 41 pierces the bottle mouth of the flow storage bottle 3, the valve needle 41 is communicated with the flow storage bottle 3, the check rib pushes against the check convex strip, and the flow storage bottle 3 is prevented from retreating; when the switch key 101 is pressed, the driving block 1011 on the switch key 101 pushes the switch valve 42 downwards, the sliding groove 423 on the switch valve 42 is matched with the sliding block 403 on the switch seat 40, and the switch valve 42 moves downwards; when the second limit portion 422 and the first limit portion 402 are abutted against each other, the switch valve 42 does not move downwards any more, and at the time, the second flow channel 421 is communicated with the first flow channel 401, and the fluid in the fluid storage bottle 3 can act on the skin of the patient through the valve needle 41, the first flow channel 401, the second flow channel 421 and the injection pipe 44; and the reset spring plate is deformed by being pressed by the downward movement of the on-off valve 42 at this time. When the cryotherapeutic apparatus is not needed to be used, the switch button 101 is released, the light-opening valve 42 is restored to the initial position under the action of the reset elastic force of the reset elastic sheet 43, the second flow channel 421 and the first flow channel 401 are disconnected from each other, and at this time, the fluid in the fluid storage bottle 3 cannot flow out.

In this scheme, this cryotherapeutic instrument's small in size, use convenient, and the security performance is high, precision is high.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. A propulsion mechanism for a cryotherapeutic apparatus, comprising:

the flow storage bottle comprises a shell, wherein an installation cavity for installing a flow storage bottle is formed in the shell, a communication hole communicated with the installation cavity is formed in the tail of the shell, a first check structure and internal threads are formed in the inner wall of the shell, and the internal threads are located in the communication hole;

the pushing knob is movably arranged at the communication hole and comprises a pushing part, a connecting part and a rotating part which are sequentially connected, wherein the connecting part is provided with an external thread, and the external thread is connected with the internal thread; the pushing part is movably arranged in the mounting cavity in a penetrating manner, and can push the flow storage bottle to move forwards; the rotating part protrudes out of the shell;

the first non-return structure is a non-return rib and is convexly arranged on the inner wall of the shell; the second non-return structure is a non-return convex strip which is convexly arranged on the outer wall of the pushing part; the check convex strips comprise a plurality of first check convex strips and a plurality of second check convex strips, one ends of the first check convex strips and the second check convex strips are connected with the connecting part, and the other ends of the first check convex strips and the second check convex strips extend to the axial direction of the pushing part along the outer wall of the pushing part; the first check convex strip and the second check convex strip both comprise a guide inclined wall and a locking straight wall, and when the rotating part is rotated, the guide inclined wall pushes the check rib; when the rotating part stops rotating, the check rib abuts against the locking straight wall.

2. The propulsion mechanism of a cryotherapeutic apparatus as claimed in claim 1, wherein the first rib has a length greater than the length of the second rib, and wherein at least one of the second ribs is disposed between two of the first ribs.

3. The propulsion mechanism of a cryotherapeutic apparatus as claimed in claim 1, wherein the pushing portion has a cylindrical surface on an outer surface thereof, the locking straight wall is perpendicular to the cylindrical surface, the guiding inclined wall forms an acute angle with the cylindrical surface, and an end of the guiding inclined wall away from the locking straight wall is connected to the cylindrical surface.

4. The propulsion mechanism of a cryotherapeutic apparatus according to any of claims 1 to 3, wherein the pushing portion moves forward and the second check structure presses the first check structure when the propulsion knob is rotated in a clockwise direction.

5. The propulsion mechanism of a cryotherapeutic apparatus according to any of claims 1 to 3, wherein the housing comprises a first and a second connected outer shell, each of the first and second outer shells having a said non-return rib;

the non-return ribs on the first shell and the non-return ribs on the second shell are symmetrically arranged in a rotation center.

6. The propulsion mechanism of a cryotherapeutic apparatus as defined in claim 1, wherein the cross-sectional area of said non-return rib is gradually increased from top to bottom.

7. The propulsion mechanism of a therapeutic freezing apparatus as claimed in claim 1, wherein an end of the pushing portion away from the connecting portion is provided with an arc surface, and when the bottle is installed in the installation cavity, the arc surface abuts against the tail of the bottle.

8. The advancing mechanism of a cryotherapeutic apparatus as defined in claim 7, wherein the advancing knob has a through hole passing through the rotating portion, the connecting portion and the pushing portion in sequence, and the through hole passes through the arc surface.

9. The propulsion mechanism of a cryotherapeutic apparatus of claim 1, wherein the internal and external threads are saw-tooth threads.

10. The propulsion mechanism of a cryotherapeutic apparatus as defined in claim 1, wherein the rotating portion is formed in a truncated cone shape, and the cross-sectional area of the rotating portion gradually increases from the end far away from the connecting portion to the end near the connecting portion;

11. A cryotherapeutic apparatus, comprising:

the propulsion mechanism of the cryotherapeutic apparatus of any of claims 1 to 10;

the switch assembly is arranged in the mounting cavity and comprises a switch seat, a valve needle, a switch valve, a reset elastic sheet and an injection pipe, the switch seat is clamped in the shell, and a first flow channel is arranged on the switch seat; the valve needle is arranged in the first flow channel and communicated with the first flow channel, when the pushing knob is rotated, the flow storage bottle moves forwards, and the valve needle can pierce through the bottle opening of the flow storage bottle and is communicated with the flow storage bottle; the switch valve is movably arranged on the switch seat, a second flow channel is arranged on the switch valve, a switch key for driving the switch valve is arranged on the shell, and the switch key can drive the second flow channel to be communicated with the first flow channel; the reset elastic sheet is arranged on the switch seat and movably abutted against the switch valve; one end of the injection pipe is arranged in the second flow channel, one end of the shell, which is far away from the pushing knob, is provided with a nozzle, and one end of the injection pipe, which is far away from the switch valve, is arranged in the nozzle in a penetrating manner.

12. The therapeutic cryosurgical instrument of claim 11, wherein the switch seat defines a first position-limiting portion, the switch valve defines a second position-limiting portion, and the second position-limiting portion abuts against the first position-limiting portion when the second flow channel communicates with the first flow channel.

13. The therapeutic cryosurgical instrument of claim 12, wherein a slider extends outwardly from each of two sides of said switch housing, said switch valve having two slots, one of said sliders being disposed in one of said slots and the other of said sliders being disposed in the other of said slots;

14. The therapeutic cryosurgical instrument of claim 13, wherein the switch housing has a second recess adjacent the switch valve, the second recess having a sealing ring disposed therein, the switch valve movably abutting the sealing ring.

15. The cryotherapeutic apparatus of claim 11 wherein a filter element is disposed in the second flow path.

16. The therapeutic cryosurgical instrument of claim 11, wherein the switch button is integrally formed with the housing, and wherein one end of the switch button is connected to the housing and the other end of the switch button is a free end, and wherein pressing the free end actuates the switch valve.

17. The therapeutic cryosurgical instrument of claim 16, wherein a driving block protrudes from the middle of the switch button toward the switch valve, the driving block is located above the switch valve, and the driving block pushes against the switch valve when the switch button is pressed.

18. The therapeutic cryosurgical instrument of claim 16, wherein the switch button defines an arcuate slot at a connection with the housing.