Freezing pen

Abstract

The utility model relates to a freezing pen, which belongs to the technical field of medical instruments and comprises a shell, a gas bottle is arranged in the shell, a first channel and a second channel are arranged between the gas bottle and an ejection port of the shell, an outlet of the gas bottle is communicated with the first channel, the ejection port is communicated with the second channel, and the freezing pen is further provided with a connecting seat. The connecting base is sleeved with a communicating piece through a spring piece, the spring piece abuts against the connecting base and the communicating piece, the communicating piece is arranged between the first channel and the second channel, a third through channel is formed in the communicating piece, when the key is pressed down, the communicating piece communicates with the first channel and the second channel, and when the key is loosened, the communicating piece is connected with the second channel. The communicating piece disconnects the first channel and the second channel. According to the freezing pen disclosed by the utility model, the application problem that the resetting is unstable after long-term use due to the fact that the key position of the current freezing pen adopts an elastic piece mode for resetting can be solved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a cryo-pen. Background Technology

[0002] The cryotherapy pen is designed based on the principles of cryotherapy. Its main mechanism is a sudden drop in temperature, causing ice crystals to form inside and outside tissue cells, disrupting their structure and causing them to rupture. Simultaneously, the low temperature causes cell dehydration, electrolyte concentration, changes in pH, protein denaturation, and cell death due to metabolism. Utilizing this principle, skin growths that detract from beauty, such as freckles, moles, and pigmentation spots, are frozen, causing their tissue cells to denature, die, and slough off, thus achieving a therapeutic and cosmetic purpose.

[0003] Traditional cryogenic pen button reset mechanisms typically rely on the deformation and reset capability of a spring. However, during prolonged use, the spring may gradually lose its elasticity due to frequent deformation and recovery, leading to unstable reset. This uneven force distribution in the reset structure and the instability of the spring can manifest as sluggish button response, inaccurate reset, or complete failure, thus affecting the long-term normal use of the cryogenic pen. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a cryogenic pen that can solve the problem of unstable reset caused by the spring-loaded reset method used in the button of the current cryogenic pen after long-term use.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a freezing pen, including a shell, a gas cylinder inside the shell, a first channel and a second channel between the gas cylinder and the outlet of the shell, the outlet of the gas cylinder being connected to the first channel, and the outlet of the gas cylinder being connected to the second channel. A connecting seat is also provided, and a connecting member is sleeved on the connecting seat via a spring member. The spring member abuts against the connecting seat and the connecting member. The connecting member is located between the first channel and the second channel, and has a through third channel. When a button is pressed, the connecting member connects the first channel and the second channel; when the button is released, the connecting member disconnects the first channel and the second channel. The gas cylinder in this technical solution refers to a bottle that releases freezing gas.

[0007] The preferred technical solution of this utility model is that the connecting seat includes a receiving groove, the shape and size of the connecting member and the receiving groove are matched, and the spring member abuts against the receiving groove and the connecting member respectively.

[0008] The preferred technical solution of this utility model is that a limiting member is provided on the connecting member, the limiting member is connected to the connecting seat, and a through hole is provided on the limiting member for the button to contact the connecting member.

[0009] The preferred technical solution of this utility model is that the connecting seat, the first channel and the second channel are integrally formed.

[0010] The preferred technical solution of this utility model is that the outer side of the connecting seat is provided with a slot, and the inner side of the housing is provided with a card plate that matches the slot, so that the connecting seat and the inner side of the housing are engaged.

[0011] A preferred embodiment of this invention is that a first sealing ring is provided at the junction of the first channel and the connecting member, and a second sealing ring is provided at the junction of the second channel and the connecting member.

[0012] The preferred technical solution of this utility model is that the button and one side of the housing are hinged together, and the other side of the housing is provided with a limiting part.

[0013] The preferred technical solution of this utility model is that the housing includes a main housing and a nozzle head, the nozzle head is provided with a nozzle channel for connecting to the outside world and a second channel, and the main housing and the nozzle head are threadedly connected.

[0014] The preferred technical solution of this utility model is that it also includes a pen end cap, which is movably connected to the tail of the shell. The gas bottle is in contact with the pushing end of the pen end cap, and the gas bottle is pushed forward by adjusting the pen end cap to move forward.

[0015] A preferred embodiment of this invention is that it further includes a pen cap, and the pen cap and the front end of the housing are threaded together.

[0016] The beneficial effects of this utility model are:

[0017] This invention proposes a cryogenic pen that solves the problem of unstable button reset by replacing the traditional spring-loaded design with a spring-loaded component. In traditional spring-loaded designs, with prolonged use, the springs are prone to fatigue, deformation, or loss of elasticity due to repeated bending and pressure, leading to instability in the button reset function, or even complete failure in some cases. The technical solution of this invention, by employing a spring-loaded component, significantly improves the stability and reliability of the button reset. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of a cryogenic pen according to Example 1;

[0020] Figure 2This is a top view of a cryogenic pen according to Embodiment 1;

[0021] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0022] Figure 4 An exploded view of a cryogenic pen according to Example 1;

[0023] Figure 5 This is a structural diagram of the connector, first channel, and second channel integrally formed in Embodiment 1;

[0024] Figure 6 This is an exploded view of the main casing of Embodiment 1.

[0025] In the picture:

[0026] 1-Housing; 11-Spray outlet; 12-Clamping plate; 13-Limiting part; 14-Nozzle head; 2-Gas cylinder; 31-First channel; 32-Second channel; 33-Third channel; 34-Nozzle channel; 4-Connecting seat; 41-Receiving groove; 42-Clamping groove; 5-Spring component; 6-Connecting component; 7-Button; 8-Limiting component; 81-Through hole; 91-First sealing ring; 92-Second sealing ring; 101-Pen end cap; 102-Pen cap. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-6As shown, this embodiment provides a cryogenic pen, including a housing 1, inside which is a gas cylinder 2, wherein the gas cylinder in this embodiment is a liquid nitrogen cylinder. A first channel 31 and a second channel 32 are provided between the gas cylinder 2 and the nozzle 11 of the housing 1. The nozzle 11 and the first channel 32 are connected. A connecting seat 4 is also provided, and a connecting member 6 is sleeved on the connecting seat 4 via a spring member 5. The spring member 5 abuts against both the connecting seat 4 and the connecting member 6. The connecting member 6 is located between the first channel 31 and the second channel 32, and a through third channel 33 is provided in the connecting member 6. When a button 7 is pressed, the connecting member 6 connects the first channel 31 and the second channel 32; when the button 7 is released, the connecting member 6 disconnects the first channel 31 and the second channel 32. One of the core innovations of this technical solution is the use of a spring member instead of the traditional spring-loaded design to solve the problem of unstable button reset in the cryogenic pen. In traditional spring-loaded systems, with prolonged use, the spring is prone to fatigue, deformation, or loss of elasticity due to repeated bending and pressure, leading to instability in the button reset function and even complete failure in some cases. This solution, however, utilizes a spring component, significantly improving the stability and reliability of button reset. Specifically, the spring component possesses better elasticity and durability, with more stable mechanical properties than a spring, maintaining a constant elastic force over a longer period. By using the spring component in conjunction with the connector and connecting part, the spring component provides sufficient restoring force when the button is released, ensuring that the connecting part can quickly disconnect the connection between the first and second channels, allowing for reliable button reset. Unlike springs, springs do not easily fatigue or deform during repeated use. The restoring force of the spring comes from its inherent elastic properties, ensuring stable button reset performance even under prolonged, high-frequency use. Furthermore, the spring component is better matched with other components; by adjusting the spring's stiffness and shape, a more controllable and stable reset action can be achieved. In contrast, spring-loaded components have lower structural flexibility and are easily affected by external environmental factors (such as temperature changes and usage frequency), causing their elasticity to decay rapidly and thus affecting the overall performance of the product. Therefore, using a spring not only improves the stability of button reset but also reduces the failure rate and maintenance costs during long-term use, extending the lifespan of the cryogenic pen and fully demonstrating the innovation and practicality of this technical solution.

[0029] Preferably, the connecting seat 4 includes a receiving groove 41, and the shape and size of the connecting member 6 and the receiving groove 41 are matched. The spring member 5 abuts against the receiving groove 41 and the connecting member 6 respectively. This design optimizes the structural stability and operational guidance of the entire reset mechanism. First, the matching shape and size of the receiving groove and the connecting member ensures the precise guidance of the connecting member during operation, allowing the connecting member to switch smoothly and effectively between the first channel and the second channel. When the button is pressed, the connecting member stably connects the two channels, and when the button is released, the spring member ensures that the connecting member quickly disconnects. The precise fit between the receiving groove and the connecting member avoids the displacement or jamming of the connecting member during movement, thus ensuring the reliability of the button reset. In addition, the relative fit between the spring member and the receiving groove and the connecting member further improves the accuracy and stability of the reset. The restoring force of the spring member and the fit design of the receiving groove and the connecting member ensure that the button reset action is not disturbed by external forces, making the reset action smoother and faster.

[0030] Preferably, a limiting member 8 is provided on the connecting member 6, and the limiting member 8 is connected to the connecting seat 4. The limiting member 8 has a through hole 81 for contact between the button 7 and the connecting member 6. First, the setting of the limiting member plays a crucial role, as it can effectively prevent excessive movement or misalignment of the connecting member during the reset process. When the button is pressed, the presence of the limiting member ensures that the connecting member will not exceed the predetermined working range, thereby preventing jamming or structural damage caused by excessive movement. The precise control of the limiting member ensures that the movement of the connecting member is stable and restricted, and can quickly and accurately disconnect the channel connection after the button is released. Second, the through hole design on the limiting member provides a stable contact surface, ensuring smoother contact between the button and the connecting member. Through this design, the contact between the button and the connecting member no longer relies on the single force of the spring, but rather on the additional positioning and support force provided by the physical structure of the limiting member. This avoids jamming caused by excessive friction or misalignment between the button and the connecting member, thereby improving the operating accuracy and lifespan of the entire reset system.

[0031] Preferably, the connecting seat 4, the first channel 31, and the second channel 32 are integrally formed. This integral design eliminates seams, connection points, or assembly steps that may exist in traditional designs, avoiding air leakage or jamming due to improper assembly. The integral forming of the connecting seat, the first channel, and the second channel ensures precise alignment of the airflow channels, making the gas flow smoother and more stable, thus guaranteeing the reliability of the button reset function. Secondly, the integral design significantly improves production efficiency, reduces assembly steps, and lowers the risk of human error during assembly. This is particularly important for mass production, significantly reducing production costs and improving product consistency. Through this integrated design, the production process of the cryogenic pen becomes simpler and more efficient, while also improving the overall structural strength and stability, making the product more durable in long-term use.

[0032] Preferably, the outer side of the connector 4 is provided with a slot 42, and the inner side of the housing 1 is provided with a locking plate 12 that matches the slot 42, so that the connector 4 and the inner side of the housing 1 are engaged in a locking fit. In traditional cryogenic pen designs, the connector usually relies on screws or other mechanical connection methods, which may lead to a complex assembly process, increased production time and cost, and is also prone to structural loosening or instability due to improper tightening. This solution, through the cooperation of the locking plate and the slot, achieves a simple and stable connection method without screws or fixing tools. The locking design not only simplifies the assembly process and improves production efficiency, but also ensures the stability of the connection, avoiding the problem of loosening of parts due to loose threads or long-term use. Through this locking fit, the connector can be more conveniently and quickly fixed in the housing, and this fixing method is not easily affected by external vibration or impact, thereby increasing the stability of the overall structure. In addition, the locking design can ensure the high strength retention force of the connector during long-term use, avoiding the loosening phenomenon caused by fatigue or friction in traditional fixing methods, which is crucial for the reliability of the cryogenic pen during long-term high-frequency use.

[0033] Preferably, a first sealing ring 91 is provided at the junction of the first channel 31 and the connecting member 6, and a second sealing ring 92 is provided at the junction of the second channel 32 and the connecting member 6. The sealing rings effectively prevent gas leakage between the channels. The button reset mechanism of the cryogenic pen relies on nitrogen pressure support; therefore, any slight leakage will affect the efficiency and reliability of the button reset. The sealing ring design ensures a tight seal between the airflow channels, avoiding reset delays or instability caused by leakage. Secondly, the sealing ring also has good durability and elasticity, maintaining its sealing effect during repeated operation and ensuring efficient operation of the reset mechanism during long-term use. The sealing ring is made of PTFE, which has excellent low-temperature resistance and is suitable for the low-temperature environment of gas cylinders.

[0034] Preferably, the button 7 is hinged to one side of the housing 1, and a limiting part 13 is provided on the other side of the housing 1. The hinge design between the button and one side of the housing provides precise control over the button during pressing and releasing. The hinge structure ensures that the button exhibits a certain rotation or oscillation state during operation, thereby distributing the force applied to the button more evenly, avoiding excessive pressure concentration in one direction, and reducing wear on the button or other components. Especially in high-frequency use, the hinge design can effectively extend the button's service life and maintain its flexibility and comfort. The limiting part on the other side of the housing restricts the button's range of motion. The function of the limiting part is to ensure that the button does not exceed the predetermined working position when pressed or reset, thereby preventing structural damage or inaccurate reset caused by excessive button pressing. The precise setting of the limiting part can prevent the button from interfering with other components, improve the accuracy of button operation, and ensure that each reset action is accurate.

[0035] Preferably, the housing 1 includes a main housing and a nozzle head 14. The nozzle head 14 has a nozzle channel 34 for communicating with the outside and a second channel 32. The main housing and the nozzle head 14 are threaded together. The threaded connection facilitates assembly and disassembly during production, making maintenance and replacement of parts convenient. Users can easily clean or replace the nozzle head, resulting in relatively low maintenance costs and greatly improving the product's ease of use and long-term reliability. Importantly, the product of this embodiment can be adapted to different nozzle heads, allowing for the replacement of nozzle heads of different specifications to adjust the diameter of the injected gas for greater targeting. Furthermore, the replaceable nozzle heads can further meet the hygiene and safety requirements of actual use.

[0036] Preferably, the device also includes a pen end cap 101, which is movably connected to the tail of the housing 1. The gas bottle 2 contacts the pushing end of the pen end cap 101. By adjusting the pen end cap 101 to move forward, the gas bottle 2 is pushed forward. The pen end cap is movably connected to the tail of the housing, and the position of the gas bottle can be adjusted by moving the pen end cap, so that the front end of the gas bottle hits the needle tip at the front end and punctures the bottle opening to release gas.

[0037] Preferably, a pen cap 102 is also provided, and the pen cap 102 is threadedly connected to the front end of the housing 1. This design provides higher sealing and stronger durability to the overall structure of the cryogenic pen. As an external protective component of the cryogenic pen, the pen cap serves to prevent dust and dirt and protect the nozzle, so that the cryogenic pen can be used normally for a long time.

[0038] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A cryogenic pen, comprising a housing (1), a gas cylinder (2) disposed within the housing (1), a first channel (31) and a second channel (32) provided between the gas cylinder (2) and the outlet (11) of the housing (1), wherein the outlet of the gas cylinder (2) is connected to the first channel (31), and the outlet (11) and the second channel (32) are connected, characterized in that: A connecting seat (4) is also provided, and a connecting member (6) is sleeved on the connecting seat (4) by a spring member (5). The spring member (5) abuts against the connecting seat (4) and the connecting member (6) respectively. The connecting member (6) is located between the first channel (31) and the second channel (32). A third channel (33) is provided through the connecting member (6). When button (7) is pressed, the connecting member (6) connects the first channel (31) and the second channel (32). When button (7) is released, the connecting member (6) disconnects the first channel (31) and the second channel (32).

2. The freezing pen according to claim 1, characterized in that: The connecting seat (4) includes a receiving groove (41), and the shape and size of the connecting member (6) and the receiving groove (41) are matched; The spring (5) abuts against the receiving groove (41) and the connecting member (6).

3. A freezing pen according to claim 1, characterized in that: The connecting member (6) is provided with a limiting member (8), and the limiting member (8) is connected to the connecting seat (4); The limiting member (8) has a through hole (81) for contact between the button (7) and the connecting member (6).

4. A freezing pen according to claim 1, characterized in that: The connecting seat (4), the first channel (31), and the second channel (32) are integrally formed.

5. A freezing pen according to claim 4, characterized in that: The outer side of the connecting seat (4) is provided with a slot (42), and the inner side of the housing (1) is provided with a card plate (12) that is compatible with the slot (42); The connecting seat (4) and the inner side of the housing (1) are engaged.

6. A freezing pen according to claim 1, characterized in that: A first sealing ring (91) is provided at the junction of the first channel (31) and the connecting member (6); A second sealing ring (92) is provided at the junction of the second channel (32) and the connecting member (6).

7. A freezing pen according to claim 1, characterized in that: The button (7) is hinged to one side of the housing (1), and a limiting part (13) is provided on the other side of the housing (1).

8. A freezing pen according to claim 1, characterized in that: The housing (1) includes a main housing and a nozzle head (14), and the nozzle head (14) is provided with a nozzle channel (34) for connecting to the outside and the second channel (32); The main housing and the nozzle head (14) are threaded together.

9. A freezing pen according to claim 1, characterized in that: It also includes a pen cap (101); The pen end cap (101) is movably connected to the tail of the housing (1). The gas bottle (2) is in contact with the pushing end of the pen end cap (101). By adjusting the pen end cap (101) to move forward, the gas bottle (2) is pushed forward.

10. A freezing pen according to claim 1, characterized in that: It also has a pen cap (102); The pen cap (102) and the front end of the housing (1) are threaded together.

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