Bidirectional locking device for breathing circuit of anaesthesia machine
By employing a two-way locking device in the breathing circuit of the anesthesia machine, which uses a single locking tongue structure to simultaneously lock the circuit assembly and the flip-top assembly, the problems of large space occupation and high cost in the prior art are solved, achieving a compact, convenient and low-cost locking effect.
Patent Information
- Application Number
- CN202511110741.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-08
- Publication Date
- 2025-11-21
AI Technical Summary
The existing anesthesia machine breathing circuit requires two sets of locking mechanisms to lock the circuit and the flap respectively, resulting in large space occupation and high cost.
A two-way locking device is adopted, which locks the circuit assembly and the flip cover assembly simultaneously through a locking tongue structure. The two locking points of the locking tongue are respectively engaged with the corresponding grooves to achieve double locking in one operation.
It achieves a locking effect that is compact in structure, occupies little space, is easy to operate, and has low cost.
Smart Images
Figure CN120990967A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical devices, and more specifically to a bidirectional locking device for a breathing circuit of an anesthesia machine. Background Technology
[0002] An anesthesia machine is used to deliver precise doses of anesthetic to patients during surgery and other medical procedures. The breathing circuit of an anesthesia machine is a component that connects to the patient, allowing the patient's exhaled gas to enter and the patient to receive the necessary gas, such as anesthetic gas, during inhalation. Simultaneously, the breathing circuit connects to the machine's gas delivery system, receiving fresh gas, driving gas, etc., from the system and expelling waste gas. To achieve this, the breathing circuit typically includes an absorber for absorbing carbon dioxide from the gas, coils or bellows for isolating the anesthetic gas from the driving gas, and so on.
[0003] In existing technologies, the design of a flap-covered circuit assembly in the breathing circuit of an anesthesia machine typically uses two locking mechanisms to lock the circuit and the flap respectively. The purpose of locking the circuit is to prevent the circuit assembly from moving during operation and causing gas leakage. The purpose of locking the flap is to prevent functional failures and leakage problems caused by the flap being lifted. The circuit and the flap are locked by two sets of locking mechanisms, which are arranged at the top and bottom respectively. The top locks the flap, and the bottom locks the circuit. Moreover, the two locking mechanisms have different structures. The two sets of locking mechanisms need to be arranged in different places, which results in a large space occupation and high cost. Summary of the Invention
[0004] This application provides a bidirectional locking device for the breathing circuit of an anesthesia machine, which can lock the cover and the circuit simultaneously. It is convenient to operate, has a simple and compact structure, occupies little space, and is low in cost.
[0005] To achieve the purpose of this invention, this application provides a bidirectional locking device for an anesthesia machine breathing circuit, wherein the anesthesia machine breathing circuit includes a circuit assembly and a circuit flip-top assembly. The bidirectional locking device is fixed to the side of the circuit assembly, and the locking tongue of the bidirectional locking device has two locking points, which correspond to the locking grooves on the side of the circuit assembly and the circuit flip-top assembly, respectively, so as to achieve simultaneous locking of the circuit assembly and the circuit flip-top assembly.
[0006] As an improvement to the above technical solution, the bidirectional locking device includes, in sequence, a housing, a latch, a lock cylinder, a pressing shaft, a spring, and an end cap; the housing is divided into two slots, one slot is used to house the lock cylinder, and the other slot is used to house the latch; the spring and the pressing shaft are sleeved on the shaft at the center of the housing from the inside out; the end cap is mounted on the housing and has a hole for the pressing shaft to pass through. The two locking points of the locking tongue are the upper locking tongue and the lower locking tongue. The upper locking tongue is used to lock the circuit end cover, and the lower locking tongue is used to lock the circuit assembly. The locking tongue also includes a limiting part, on which two inclined slides are symmetrically arranged on the inner side. The pressing shaft is located inside the limiting part, and a first sliding shaft is provided on the side at the lower end of the pressing shaft. The bosses at both ends of the first sliding shaft cooperate with the two inclined slides. When the pressing shaft moves up and down along the axial direction, the locking tongue moves forward and backward perpendicular to the axial direction under the push of the bosses.
[0007] Furthermore, a second sliding shaft is also provided laterally at the lower end of the pressing shaft. This second sliding shaft cooperates with the lock cylinder to control the pressing shaft to be in the locked or unlocked position. The first and second sliding shafts are arranged parallel to each other at the lower end of the pressing shaft.
[0008] As a further improvement to the above technical solution, the outer end of the pressing shaft is provided with an external thread, which is used to tighten a button with an internal thread for operating the circuit lock.
[0009] As another improvement to the above technical solution, the lock cylinder is installed in a small rectangular groove at the rear end of the outer shell, and the outer side of the lock cylinder is provided with two elastic support arms so that the lock cylinder fits tightly against the inner wall of the outer shell after installation; the inner side of the lock cylinder is provided with an annular slide for cooperating with the second sliding shaft.
[0010] As an improvement to the above technical solution, according to claim 1, the bidirectional locking device is characterized in that the two locking points of the locking tongue of the bidirectional locking device are collinear, and correspondingly, the locking grooves on the side of the circuit assembly and the circuit flip cover assembly are also collinear.
[0011] The circuit lock of this application is fixed on the anesthesia machine. The internal locking tongue has two locking points. After the circuit assembly and circuit cover are installed in place, the button is pressed and the pressing shaft moves downward. The protrusions on both sides of the pressing shaft move along the inclined slide inside the locking tongue, pushing the locking tongue out. The upper locking tongue is locked into the groove of the circuit cover, and the lower locking tongue is locked into the groove of the circuit assembly, thus realizing the locking effect of the circuit cover and the circuit assembly in one operation. When the button is released, the rear protrusion of the pressing shaft is locked into the lower groove of the lock cylinder, thus locking the pressing shaft and keeping the circuit lock locked. When the circuit needs to be removed, press the button again. The boss at the rear end of the pressing shaft slides out of the groove at the lower end of the lock cylinder. After releasing the button, the spring installed in the center of the pressing shaft pushes the pressing shaft to move outward. The bosses on both sides of the pressing shaft drive the lock tongue to retract, thus completing the unlocking of the circuit flip cover and the circuit assembly.
[0012] The advantages of this application are: The circuit lock adopts a double-latch structure, which can simultaneously achieve double locking from the top and bottom. It occupies little space, has a compact structure, is easy to operate, and has low cost. Attached Figure Description
[0013] Figure 1 This is a cross-sectional schematic diagram of the bidirectional locking device for the breathing circuit of an anesthesia machine according to this application; Figure 2 This is an exploded perspective view of the bidirectional locking device for the breathing circuit of an anesthesia machine according to this application; Figure 3 This is a schematic diagram of the circuit assembly and circuit flip-top assembly used in the breathing circuit of an anesthesia machine according to this application; Figure 4 This is a schematic diagram of the locking tongue in the bidirectional locking device for the breathing circuit of an anesthesia machine used in this application; Figure 5 This is a schematic diagram of the pressing shaft in the bidirectional locking device for the breathing circuit of an anesthesia machine used in this application; Figure 6 This is a schematic diagram of the lock core in the bidirectional locking device for the breathing circuit of an anesthesia machine used in this application.
[0014] Attached image labels: 1. Loop assembly; 2. Loop flip cover assembly; 3. Loop lock assembly. 31. Outer shell; 32. Lock cylinder; 33. Lock tongue 34. Spring; 35. Pressing shaft; 36. End cap 37. Button; 38. Central axis; 39. Inclined slide. 331. Upper locking tongue; 332. Lower locking tongue; 333. Limiting part 41. Loop assembly locking groove 42. Loop cover assembly locking groove 5. First sliding shaft; 6. Second sliding shaft 7. Flexible support arm; 8. Circular slide rail; 9. Locking position. 10. Unlock position Detailed Implementation
[0015] The technical solution of this application will be described in detail below with reference to the accompanying drawings and embodiments. In these drawings, the same or similar parts are referred to by the same or similar reference numerals.
[0016] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.
[0017] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.
[0018] like Figure 1 and Figure 2 As shown, the bidirectional locking device of this application includes: a housing 31, a lock cylinder 32, a latch 33, a spring 34, a pressing shaft 35, and an end cap 36; the housing 31 is divided into two slots, one slot is used to house the lock cylinder 32, and the other slot is used to house the latch 33; the spring 34 and the pressing shaft 35 are sleeved on the shaft at the center of the housing from the inside out; the end cap 36 is mounted on the housing 31 and has a hole for the pressing shaft 35 to pass through. The end cap 36 is fastened to the housing 31, fixing the lock cylinder 32, the latch 33, the spring 34, and the pressing shaft 35 in the corresponding spaces.
[0019] In practical applications, the outer end of the pressing shaft 35 is provided with an external thread, which can be used to tighten the button 37 with an internal thread for more convenient operation of the circuit lock.
[0020] like Figure 3 As shown, a loop assembly locking groove 41 and a loop cover assembly locking groove 42 are respectively provided on the side of the loop assembly 1 and the same side of the loop cover assembly 2.
[0021] like Figure 4 As shown, the locking tongue 33 is installed in the large groove at the front end of the housing 31. There are two locking points on the outside of the locking tongue 33: the upper locking tongue 331 and the lower locking tongue 332. The upper locking tongue 331 is used to lock the circuit flip cover, and the lower locking tongue 332 is used to lock the circuit assembly. Two inclined slides 39 are symmetrically arranged on the inner side of the limiting part 333 of the locking tongue 33.
[0022] like Figure 1 and 6 As shown, the pressing shaft 35 is a hollow structure, fitted around the spring 34, which is fitted onto the central shaft 38. Two sliding shafts are arranged parallel to each other on both sides of the lower end of the pressing shaft 35. The first sliding shaft 5 can slide within the inclined sliding grooves on both sides inside the latch 33, and the second sliding shaft 6 slides within the annular slide rail 8 of the lock cylinder 32.
[0023] like Figure 6As shown, the lock cylinder 32 has two elastic support arms 7 on one side. The lock cylinder 32 is installed in a small rectangular groove at the rear end of the outer shell. The width of the lock cylinder 32 is smaller than the width of the rectangular groove of the outer shell 31. The lock cylinder 32 can slide in the rectangular groove. The elastic support arms 7 deform and support the inner wall of the outer shell 31, so that the outer side of the lock cylinder 32 is close to the inner wall of the outer shell 31. An annular slide rail 8 is provided on the side of the lock cylinder 32 near the middle part. The annular slide rail 8 has an uneven structure.
[0024] In actual operation, the circuit lock assembly 3 is fixed on the anesthesia machine. The internal locking tongue 33 has two locking points. After the circuit assembly 1 and the circuit flip-top assembly 2 are installed in place, pressing button 37 causes the pressing shaft 35 to move downward and compress the spring 34. The first sliding shaft 5 at the lower end of the pressing shaft 35 moves along the inclined slide 39 inside the locking tongue 33, pushing the locking tongue 33 out. The upper locking tongue 331 engages in the locking groove 42 of the circuit flip-top assembly, and the lower locking tongue 332 engages in the locking groove 41 of the circuit assembly, thus achieving the locking effect of the circuit flip-top assembly and the circuit assembly in one operation. When button 37 is released, the second sliding shaft 6 of the pressing shaft 35 engages in the locking position 9 of the lock cylinder 32, thus locking the pressing shaft 35 and maintaining the circuit lock in a locked state.
[0025] When the circuit needs to be removed, press button 37 again. The second sliding shaft 6 of the pressing shaft 35 slides out from the locking position 9 of the lock cylinder 32. After releasing, the spring 34 installed in the center of the pressing shaft 35 pushes the pressing shaft 35 to move outward. The first sliding shaft 5 on the lower side of the pressing shaft 35 drives the lock tongue 33 to retract. In this way, the unlocking of the circuit flip cover assembly and the circuit assembly is completed.
[0026] Specifically, the movement of each part during locking and unlocking of the circuit lock is as follows: Because the pressing shaft 35 moves up and down along the central axis 38 on the outer casing, the corresponding inclined slide 39 moves back and forth. Therefore, when the button 37 is pressed, the pressing shaft 35 compresses the spring 34 and moves downward. The inclined slides 39 are symmetrically arranged on the two parallel inner surfaces of the limiting part 333 of the latch 33. The bosses at both ends of the first sliding shaft 5 at the lower end of the pressing shaft 35 slide within the inclined slide 39. When it slides from the upper end of the inclined slide 39 to the lower end of the inclined slide 49, it pushes the lock. The tongue moves laterally and slides out from the opening on the outer casing 11, engaging with the locking groove. The upper locking tongue 331 engages with the locking groove 42 of the circuit flip assembly to lock the circuit flip; the lower locking tongue 332 engages with the locking groove 41 of the circuit assembly to lock the circuit assembly. At the same time, the second sliding shaft 6 on the pressing shaft 35 slides down from the unlocking position 10 of the lock cylinder 32 to the locking position 9 to achieve the locking function, locking the pressing shaft and maintaining the locked state of the circuit flip assembly and the circuit assembly.
[0027] When the button is pressed again, the second sliding shaft 6 on the pressing shaft 35 slides out from the locking position 9 of the lock cylinder 32 and slides upward to the unlocking position 10 under the action of the spring 34. The first sliding shaft 5 of the pressing shaft 35 slides in the inclined slide 39 on the bolt 33, from the lower end of the inclined slide 39 to the upper end of the inclined slide 39, pushing the bolt 33 to move laterally, leaving the locking groove, and retracting from the opening on the outer shell 31, thereby unlocking.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although This application has been described in detail with reference to the embodiments. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application, and should all be covered within the scope of the claims of this application.
Claims
1. A bidirectional locking device for a breathing circuit of an anesthesia machine, the breathing circuit of the anesthesia machine comprising a circuit assembly and a circuit flip-cover assembly, characterized in that, The bidirectional locking device is fixed to the side of the circuit assembly. The locking tongue of the bidirectional locking device has two locking points, which correspond to the locking grooves on the sides of the circuit assembly and the circuit flip assembly, respectively, so as to achieve simultaneous locking of the circuit assembly and the circuit flip assembly.
2. The bidirectional locking device according to claim 1, characterized in that, The bidirectional locking device includes, in sequence, a housing, a latch, a lock cylinder, a pressing shaft, a spring, and an end cap; the housing is divided into two slots, one slot for housing the lock cylinder and the other slot for housing the latch; the spring and the pressing shaft are fitted onto the shaft at the center of the housing from the inside out; the end cap is mounted on the housing and has a hole for the pressing shaft to pass through. The two locking points of the locking tongue are the upper locking tongue and the lower locking tongue. The upper locking tongue is used to lock the circuit end cover, and the lower locking tongue is used to lock the circuit assembly. The locking tongue also includes a limiting part, on which two inclined slides are symmetrically arranged on the inner side. The pressing shaft is located inside the limiting part, and a first sliding shaft is provided on the side at the lower end of the pressing shaft. The bosses at both ends of the first sliding shaft cooperate with the two inclined slides. When the pressing shaft moves up and down along the axial direction, the locking tongue moves forward and backward perpendicular to the axial direction under the push of the bosses.
3. The bidirectional locking device according to claim 1 or 2, characterized in that, The lower end of the pressing shaft is also provided with a second sliding shaft, which cooperates with the lock cylinder to control the pressing shaft to be in the locked or unlocked position.
4. The bidirectional locking device according to claim 3, characterized in that, The first and second sliding shafts are arranged in parallel at the lower end of the pressing shaft.
5. The bidirectional locking device according to claim 1, characterized in that, The outer end of the pressing shaft is provided with an external thread, which is used to tighten a button with an internal thread for operating the circuit lock.
6. The bidirectional locking device according to claim 1, characterized in that, The lock cylinder is installed in a small rectangular groove at the rear end of the outer shell. The outer side of the lock cylinder is provided with two elastic support arms so that the lock cylinder fits tightly against the inner wall of the outer shell after installation. The inner side of the lock cylinder is provided with an annular slide for cooperating with the second sliding shaft.
7. The bidirectional locking device according to claim 1, characterized in that, The two locking points of the locking tongue of the bidirectional locking device are collinear, and correspondingly, the locking grooves on the sides of the circuit assembly and the circuit flip cover assembly are also collinear.