Anesthetic gas measuring module and patient monitor

Abstract

The utility model provides an anesthetic gas measuring module and a patient monitor. The anesthetic gas measuring module comprises a main machine, a measuring module and a controller, wherein a through hole is formed in a shell of the main machine; the water collecting box assembly is located on the outer side of the shell; the supporting plate is located on the inner side of the shell, and the water collecting box assembly is close to the supporting plate through the through hole and is fixedly connected to the supporting plate; the holding plate is located on the inner side of the shell, the holding plate is fixedly connected to the shell, and the bearing plate is rotatably clamped between the shell and the holding plate; wherein the water collecting box assembly is fixedly connected with at least one of the supporting plate and the retaining plate through a clamping structure, and the water collecting box assembly is fixedly connected with at least one of the supporting plate and the shell through a clamping structure. According to the anesthetic gas measuring module and the patient monitor, the assembling process is simple, the manufacturing efficiency is remarkably improved, and the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to a patient monitor, in particular to an anesthetic gas measurement module for a patient monitor and a patient monitor including such an anesthetic gas measurement module. Background Art

[0002] A patient monitor is used to collect, analyze, store, display and print multiple physiological parameters of a patient, so as to help medical staff understand the physiological state of the patient. As required, the patient monitor can be installed with a plug-in such as an anesthetic gas measurement module to help medical staff monitor and manage the anesthesia of the patient by monitoring the concentration of anesthetic gas in the patient's breathing gas.

[0003] The anesthetic gas measurement module generally includes a main unit and a water collecting box assembly installed outside the main unit. The patient's breathing gas is sent to the water collecting box assembly before being transported to the main unit for analysis and measurement, so that the moisture in the breathing gas is collected in the water collecting box assembly. The patient monitor equipped with the anesthetic gas measurement module may be placed upright or flat during use as required. When the patient monitor is placed flat, the water collecting box assembly of the anesthetic gas measurement module also changes from the upright position to the horizontal position, which may cause the moisture in the water collecting box assembly to flow into the main unit, thus affecting the measurement accuracy of the anesthetic gas concentration. For this reason, the water collecting box assembly is usually arranged to be rotatably installed on the main unit of the anesthetic gas measurement module between the upright position and the horizontal position. The existing anesthetic gas measurement module needs to adopt a complex structure and screws to rotatably install the water collecting box assembly on the main unit of the anesthetic gas measurement module, which makes the assembly process of the anesthetic gas measurement module complex, the manufacturing efficiency low, and the cost high.

[0004] Therefore, it is necessary to improve the existing anesthetic gas measurement module for a patient monitor. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome at least one defect in the above-mentioned prior art, and provide an anesthetic gas measurement module for a patient monitor and a patient monitor including such an anesthetic gas measurement module. The assembly process of this anesthetic gas measurement module and patient monitor is simple, the manufacturing efficiency is significantly improved, and the cost is greatly reduced.

[0006] According to one aspect of the utility model, there is provided an anesthetic gas measurement module, characterized in that the anesthetic gas measurement module includes:

[0007] A main unit, a through hole is formed on the housing of the main unit;

[0008] A water collecting box assembly located outside the housing;

[0009] A support plate located inside the housing, the water collection box assembly approaching the support plate through the through hole and being fixedly connected to the support plate; and

[0010] A retaining plate located inside the housing, the retaining plate being fixedly connected to the housing, and the support plate being rotatably clamped between the housing and the retaining plate;

[0011] Wherein, at least one of the water collection box assembly and the support plate and the retaining plate and the housing is fixedly connected by a snap connection structure.

[0012] Optionally, a first blocking portion is provided adjacent to the through hole on the inner side of the housing, and a second blocking portion is provided adjacent to the through hole and spaced apart from the first blocking portion on the inner side of the housing. The first blocking portion acts with the retaining plate to limit the rotation of the retaining plate relative to the housing in one circumferential direction and the movement in the direction of the central axis of the retaining plate, and the second blocking portion acts with the retaining plate to limit the rotation of the retaining plate relative to the housing in the direction opposite to the one direction.

[0013] Optionally, the first blocking portion defines a circumferential guide groove that is open at one end and closed at the other end on the outer periphery of the through hole, the second blocking portion defines a recess, a radially protruding lug is provided on the outer peripheral edge of the retaining plate, and a first protrusion is provided spaced apart from the lug. The lug of the retaining plate is received in the circumferential guide groove and abuts against the closed end of the circumferential guide groove, and the first protrusion of the retaining plate is received in the recess.

[0014] Optionally, the circumferential guide groove is defined by an L-shaped protrusion protruding from the inner side of the housing.

[0015] Optionally, an elastic arm is provided on the outer peripheral edge of the retaining plate spaced apart from the lug, and the first protrusion is provided at the free end of the elastic arm.

[0016] Optionally, the elastic arm is formed by providing an L-shaped groove near the outer peripheral edge of the retaining plate.

[0017] Optionally, the first protrusion is formed in a tip shape with a decreasing size towards the end.

[0018] Optionally, an elastic snap tab is provided on one of the support plate and the water collection box assembly, and a snap groove is provided on the other of the support plate and the water collection box assembly, and the elastic snap tab is snapped into the snap groove.

[0019] Optionally, at least one notch for the passage of a gas pipeline is formed on the circumferential edge of the support plate.

[0020] Optionally, at least two elastic alignment portions are provided on the support plate. A radially outward second protrusion is formed at the free end of the elastic alignment portion. A central hole is formed at the center of the holding plate. The elastic alignment portion passes through the central hole and holds the holding plate in position by means of the second protrusion.

[0021] Optionally, the support plate is formed to include a circumferential edge portion and a central boss portion protruding relative to the circumferential edge portion. The central boss portion is received in a through hole and is coplanar with the outer side of the housing.

[0022] Optionally, a protrusion is formed at a position 90° apart on one of the support plate and the holding plate, and a concave cavity is correspondingly formed at a position 90° apart on the other of the support plate and the holding plate. The protrusion is received in the concave cavity.

[0023] Optionally, an arc-shaped groove through which a gas pipeline passes is provided on the holding plate.

[0024] Optionally, the housing, the water collection box assembly, the support plate, and the holding plate are formed by plastic injection molding, and the clamping structure is integrally formed with the housing, the water collection box assembly, the support plate, and the holding plate.

[0025] According to another aspect of the present invention, a patient monitor is provided, characterized in that the patient monitor includes the anesthesia gas measurement module as described above.

[0026] According to the anesthesia gas measurement module of the present invention, the water collection box assembly and the support plate are connected and / or the holding plate and the housing are connected through a clamping structure. Therefore, the anesthesia gas measurement module according to the present invention can be installed on the main body of the anesthesia gas measurement module without using a complex structure and can reduce or eliminate the need for screws to rotatably install the water collection box assembly, which simplifies the assembly process of the anesthesia gas measurement module, significantly improves the manufacturing efficiency, and greatly reduces the cost. Description of the Drawings

[0027] Figure 1 The anesthesia gas measurement module according to the present invention is schematically shown in a perspective view. For simplicity, only a partial housing of the main body of the anesthesia gas measurement module is shown, and other parts of the main body of the anesthesia gas measurement module are omitted.

[0028] Figure 2 is Figure 1 Another perspective view of the shown anesthesia gas measurement module;

[0029] Figure 3is an exploded perspective view of an anesthetic gas measurement module according to the present utility model;

[0030] Figure 4 Schematically shows in perspective view the front housing of the main body of an anesthetic gas measurement module according to the present utility model;

[0031] Figure 5 is Figure 4 another perspective view of the front housing shown;

[0032] Figure 6 is Figure 4 yet another perspective view of the front housing shown;

[0033] Figure 7 Schematically shows in perspective view the support plate of an anesthetic gas measurement module according to the present utility model;

[0034] Figure 8 is Figure 7 another perspective view of the support plate shown;

[0035] Figure 9 Schematically shows in perspective view the holding plate of an anesthetic gas measurement module according to the present utility model;

[0036] Figure 10 is Figure 9 another perspective view of the holding plate shown;

[0037] Figure 11 Schematically shows in perspective view the water collection box assembly and the support plate being mounted onto the front housing;

[0038] Figure 12 Schematically shows in perspective view the holding plate being mounted onto the support plate;

[0039] Figure 13 Schematically shows in a top view the holding plate being mounted onto the support plate;

[0040] Figure 14 is similar to Figure 13 a top view, schematically showing the holding plate being held in a fixed position relative to the front housing; and

[0041] Figure 15 is Figure 1 a cross-sectional view of the anesthetic gas measurement module shown, wherein the water collection box assembly is omitted for clarity. Detailed Embodiment

[0042] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings, but it should be understood that the drawings are only for illustrating the present utility model and do not constitute a limitation to the present utility model.

[0043] Figure 1 The anesthetic gas measurement module according to the present utility model is schematically shown in a perspective view, Figure 2 is Figure 1 Another perspective view of the shown anesthetic gas measurement module, Figure 3 is an exploded perspective view of the anesthetic gas measurement module according to the present utility model. Since the present utility model does not relate to the improvement of the analysis and measurement elements of the main body of the anesthetic gas measurement module, for the sake of simplicity, only a part of the housing of the main body of the anesthetic gas measurement module, for example, the front housing of the main body of the anesthetic gas measurement module, is shown in the figure, and other parts of the main body of the anesthetic gas measurement module are omitted. As Figures 1 to 3 shown, the anesthetic gas measurement module 1 includes a main body and a water collecting box assembly 5 rotatably mounted on the housing 3 of the main body. The anesthetic gas measurement module 1 further includes a support plate 7 and a holding plate 9. The holding plate 9 is fixedly provided on the inner side of the housing 3 of the main body. The support plate 7 is rotatably clamped between the housing 3 and the holding plate 9, and the water collecting box assembly 5 is fixedly connected to the support plate 7.

[0044] Figure 4 The front housing of the main body of the anesthetic gas measurement module according to the present utility model is schematically shown in a perspective view, Figure 5 is Figure 4 Another perspective view of the shown front housing, and Figure 6 is Figure 4 Another perspective view of the shown front housing. As Figures 4 - 6 shown, a through hole 11 penetrating the housing is formed on the housing 3 (for example, the front housing) of the main body of the anesthetic gas measurement module. Although the through hole 11 can be square, oval or other suitable shapes, the through hole 11 is preferably circular. Since the water collecting box assembly 5 is located outside the housing 3 and the support plate 7 and the holding plate 9 are located inside the housing 3, the water collecting box assembly 5 approaches the support plate 5 through the through hole 11 to achieve mutual connection. A first blocking portion 13 is provided adjacent to the through hole 11 on the inner side of the housing 3. The first blocking portion 13 defines a circumferential guide groove 15 that is open at one end and closed at the other end on the outer circumference of the through hole 11. In a preferred embodiment, the circumferential guide groove 15 that is open at one end and closed at the other end is defined by a generally L-shaped protrusion protruding from the inner side of the housing 3. A second blocking portion 17 is provided adjacent to the through hole 11 on the inner side of the housing 3 and spaced apart from the first blocking portion 13. The second blocking portion 17 is formed with a recess 19 on the side away from the first blocking portion 13. In a preferred embodiment, three first blocking portions 13 and three second blocking portions 17 are provided adjacent to the through hole 11 on the inner side of the housing 3 at intervals. It should be understood that it is also feasible to provide less than or more than three first blocking portions 13 and less than or more than three second blocking portions 17 adjacent to the through hole 11 on the inner side of the housing 3 at intervals.

[0045] Figure 7A perspective view schematically shows a support plate of an anesthesia gas measurement module according to the present utility model. Figure 8 is Figure 7 Another perspective view of the shown support plate. The support plate is preferably disc-shaped. As Figure 7 shown, on one side of the support plate 7, for example, the side where the water collecting box assembly will be installed, there are formed a positioning projection 21, a plug hole 23, and an elastic clamping piece 25. As Figure 3 shown, on the side of the water collecting box assembly connected to the support plate 7, there are formed corresponding positioning grooves 27, plug posts 29, and clamping grooves 31 to fixedly connect the water collecting box assembly 5 to the support plate 7. As Figure 8 shown, on the other side of the support plate 7, there are preferably formed at least two elastic alignment parts 33. In addition, at least one notch 35 is formed at the circumferential edge of the support plate 7 so that a gas pipeline (not shown) from the water collecting box assembly can extend through the notch 35.

[0046] Figure 9 A perspective view schematically shows a holding plate of an anesthesia gas measurement module according to the present utility model. Figure 10 is Figure 9 Another perspective view of the shown holding plate. As Figure 9 and 10 shown, a central hole 37 is formed at the center of the holding plate 9, and the diameter of the central hole 37 is substantially the same as the distance between the outer sides of two radially opposite elastic alignment parts 33 on the support plate 7, so that the elastic alignment parts 33 on the support plate 7 can pass through the central hole 37 on the holding plate 9 and enable the holding plate 9 to rotate around the elastic alignment parts 33 on the support plate 7. Radially protruding lugs 39 are provided at the outer peripheral edge of the holding plate 9, and elastic arms 41 that are spaced apart from the lugs 39 and extend substantially circumferentially are provided. The free ends of the elastic arms 41 form radially protruding first protrusions 43. Preferably, the elastic arms 41 are formed by providing substantially L-shaped grooves 45 near the outer peripheral edge of the holding plate 9.

[0047] The following describes the process of installing the water collecting box assembly onto the main body of the anesthesia gas measurement module.

[0048] Press the support plate 7 against the inner side of the housing 3 and make the positioning projection 21, the plug hole 23, and the elastic clamping piece 25 on the support plate 7 be located in the through hole 11 of the housing 3. Then, align the positioning groove 27, the plug post 29, and the clamping groove 31 on the water collecting box assembly 5 with the positioning projection 21, the plug hole 23, and the elastic clamping piece 25 on the support plate 7 respectively and snap the water collecting box assembly 5 onto the support plate 7, so that the water collecting box assembly 5 is fixedly connected to the support plate 7 by snap connection. As Figure 11As shown. Although the positioning protrusions 21 and the insertion holes 23 are provided on the support plate 7, it should be understood that one or both of the positioning protrusions 21 and the insertion holes 23 may not be provided on the support plate 7. Accordingly, one or both of the positioning grooves 27 and the insertion posts 29 may not be provided on the water collecting box assembly 5. Moreover, it is also feasible that one or both of the positioning protrusions 21 and the insertion holes 23 are provided on the water collecting box assembly 5, and one or both of the positioning grooves 27 and the insertion posts 29 are correspondingly provided on the support plate 7. Of course, it is also feasible that the elastic clamping pieces 25 are provided on the water collecting box assembly 5 and the clamping grooves 31 are provided on the support plate 7. For the positioning and placement of the support plate 7 relative to the housing, and to reduce the gaps between the various components after the water collecting box assembly 5 is fixedly connected to the support plate 7, the support plate 7 is formed to include a circumferential edge portion 7a and a central boss portion 7b protruding relative to the circumferential edge portion 7a, and the diameter of the central boss portion 7b is generally equal to or slightly smaller than the diameter of the through hole 11 of the housing 3. In this way, the circumferential edge portion 7a of the support plate 7 can be closely attached to the inner side of the housing 3, and the central boss portion 7b of the support plate 7 can just be received in the through hole 11, as Figure 15 shown. Preferably, when the central boss portion 7b of the support plate 7 is received in the through hole 11, the central boss portion 7b is generally coplanar with the outer side of the housing 3.

[0049] Next, align the elastic alignment portion 33 on the support plate 7 with the central hole 37 on the holding plate 9 and push the holding plate 9 towards the support plate 7 so that the elastic alignment portion 33 passes through the central hole 37 to preliminarily position the holding plate 9 relative to the support plate 7. To prevent the holding plate 9 from falling off the support plate 7, a radially outward second protrusion 33a is formed at the free end of the elastic alignment portion 33, and the second protrusion 33a is formed in a tip shape with a smaller size towards the end to help the elastic alignment portion 33 insert into the central hole 37 and hold the holding plate 9 in position relative to the support plate 7 after the holding plate 9 passes over the second protrusion 33a of the elastic alignment portion 33, as Figure 12 and 13 shown.

[0050] Subsequently, along Figure 13Rotate the retaining plate 9 clockwise relative to the housing 3 such that the lug 39 on the retaining plate 9 rotates into the circumferential guide groove 15 defined by the first stop portion 13 on the housing 3 until the lug 39 contacts the closed end of the circumferential guide groove 15 and the retaining plate 9 can no longer be rotated. During the rotation of the lug 9 towards the closed end of the circumferential guide groove 15, the first protrusion 43 on the free end of the elastic arm 41 on the retaining plate 9 contacts the second stop portion 17 on the housing 3, causing the elastic arm 41 to be biased towards the center of the retaining plate. At the same time as the lug 39 contacts the closed end of the circumferential guide groove 15, the first protrusion 43 on the free end of the elastic arm 41 also rebounds past the body of the second stop portion 17 and into the recess 19 on the first stop portion 13. For this reason, the circumferential distance between the lug 39 on the retaining plate and the first protrusion 43 on the free end of the elastic arm 41 is substantially the same as the circumferential distance between the closed end of the circumferential guide groove 15 on the housing 3 and the recess 19 on the first stop portion 13. At this time, the first stop portion 13 on the housing 3 prevents the retaining plate 9 from rotating further relative to the housing 3 in the Figure 14 clockwise direction, and the first stop portion 13 also prevents the retaining plate 9 from moving relative to the housing 3 along the central axis direction of the retaining plate. At the same time, the second stop portion 17 prevents the retaining plate 9 from rotating relative to the housing 3 in the Figure 14 counterclockwise direction. In this way, the retaining plate 9 is held immovably relative to the housing 3 on the housing 3 as shown in Figure 14 and reliably clamps the support plate 7 between the retaining plate and the housing 3, but allows the support plate 7 to rotate relative to the housing 3 and the retaining plate 9. In order to assist the second stop portion 17 in biasing the elastic arm 41 towards the center of the retaining plate during the clockwise rotation of the retaining plate 9 in Figure 13 , the first protrusion 43 on the free end of the elastic arm 41 is formed with a tip shape that tapers towards the end. It should be understood that in the case where no elastic alignment portion 33 is formed on the support plate 7 and no central hole 37 is formed on the retaining plate 9, the cooperation between the first stop portion 13 and the lug 39 and the cooperation between the second stop portion 17 and the first protrusion 43 on the elastic arm 41 can also be used to hold the retaining plate 9 immovably relative to the housing 3 on the housing 3.

[0051] During the normal use of the anesthesia gas measurement module, the water collecting box assembly 5 cannot be rotated freely relative to the housing. To this end, one of the two surfaces of the support plate 7 and the holding plate 9 facing each other is formed with a protrusion 47 at positions spaced 90° apart, and the other of the two surfaces of the support plate 7 and the holding plate 9 facing each other is correspondingly formed with a cavity 49 for receiving the protrusion 47 at positions spaced 90° apart. In a preferred embodiment, the protrusion 47 is formed on the surface of the holding plate 9 facing the support plate 7, and the cavity 49 for receiving the protrusion 47 is formed on the surface of the support plate 7 facing the holding plate 9. The shape and size of the protrusion 47 and the cavity 49 are selected such that when the water collecting box assembly is in an upright orientation, the protrusion 47 is received in the cavity 49 to prevent the water collecting box assembly 5 from rotating freely relative to the housing. However, when the user rotates the water collecting box assembly with force, the protrusion 47 can be disengaged from the cavity 49 to allow the water collecting box assembly to rotate 90° relative to the housing 3 and the protrusion 47 to be received in the cavity 49 again. In order for the protrusion 47 to be easily disengaged from the cavity 49 when the user rotates the water collecting box assembly with force, the protrusion 47 is preferably formed to have an arc-shaped surface. It should be understood that it is also feasible for the water collecting box assembly 5 to be held in the desired position relative to the housing by frictional resistance.

[0052] Since the anesthesia gas measurement module is also provided with a gas pipeline (not shown) extending from the water collecting box assembly 3 to the main unit, the gas pipeline will rotate with the water collecting box assembly during the rotation of the water collecting box assembly. To this end, an arc-shaped groove 51 for the gas pipeline to pass through can be provided on the holding plate 9 to allow the gas pipeline to rotate with the water collecting box assembly.

[0053] When it is necessary to remove the holding plate 9 from the housing 3, the elastic arm 41 is pressed towards the center to move the first protrusion 43 out of the recess 19, and then the holding plate 9 can be rotated counterclockwise, and further the lug 39 can be moved out of the circumferential guide groove 15. Subsequently, the holding plate 9 can be pulled out from the elastic alignment portion 33 on the support plate 7.

[0054] In the above preferred embodiment, the water collecting box assembly is fixedly connected to the support plate through a snap connection structure, the holding plate is fixedly connected to the housing through a snap connection structure, and the support plate is rotatably clamped between the housing and the holding plate relative to the housing and the holding plate. It should be understood that it is also feasible to connect any one of the water collecting box assembly and the support plate and the holding plate and the housing through a snap connection structure, that is, only the water collecting box assembly and the support plate are connected through a snap connection structure, or only the holding plate and the housing are connected through a snap connection structure. The water collecting box assembly, the support plate, the housing and the holding plate are usually made by plastic injection molding, and the structure realizing the snap connection structure is usually integrally formed on the water collecting box assembly, the support plate, the housing and the holding plate by injection molding. Therefore, the anesthesia gas measurement module according to the present invention does not need to adopt a complex structure and can reduce or eliminate the need for screws to rotatably mount the water collecting box assembly to the main body of the anesthesia gas measurement module, which makes the assembly process of the anesthesia gas measurement module simple, significantly improves the manufacturing efficiency, and greatly reduces the cost.

[0055] Although the present invention has been described in detail in conjunction with the preferred embodiments of the present invention, it should be understood that such detailed description is only for explaining the present invention and does not constitute a limitation to the present invention. The scope of the present invention is determined by the technical solutions defined by the claims.

Claims

1. An anesthetic gas measurement module, characterized in that, The anesthetic gas measurement module includes: a main body, a through hole (11) being formed on a housing (3) of the main body; a water collecting box assembly (5) located outside the housing (3); a support plate (7) located inside the housing (3), the water collecting box assembly (5) approaching the support plate (7) through the through hole (11) and being fixedly connected to the support plate (7); and a holding plate (9) located inside the housing (3), the holding plate being fixedly connected to the housing (3), and the support plate (7) being rotatably clamped between the housing (3) and the holding plate (9); wherein, the water collecting box assembly (5) is fixedly connected to at least one of the support plate (7) and the holding plate (9) and the housing (3) through a snap connection structure.

2. The anesthetic gas measurement module according to claim 1, characterized in that A first blocking portion (13) is provided on the inner side of the housing (3) adjacent to the through hole (11), and a second blocking portion (17) is provided on the inner side of the housing (3) adjacent to the through hole (11) and spaced apart from the first blocking portion (13). The first blocking portion (13) acts on the holding plate (9) to limit the holding plate (9) from rotating in a circumferential direction and moving in a direction along the central axis of the holding plate (9) relative to the housing (3), and the second blocking portion (17) acts on the holding plate (9) to limit the holding plate (9) from rotating in a direction opposite to the one direction relative to the housing (3).

3. The anesthetic gas measurement module according to claim 2, wherein, The first blocking portion (13) defines a circumferential guide groove (15) that is open at one end and closed at the other end on the outer periphery of the through hole (11). The second blocking portion (17) defines a recess (19). A radially protruding lug (39) and a first protrusion portion (43) spaced apart from the lug are provided on the outer peripheral edge of the holding plate (9). The lug (39) of the holding plate (9) is received in the circumferential guide groove (15) and abuts against the closed end of the circumferential guide groove (15), and the first protrusion portion (43) of the holding plate (9) is received in the recess (19).

4. The anesthetic gas measurement module according to claim 3, wherein The circumferential guide groove (15) is defined by an L-shaped protrusion protruding from the inner side of the housing (3).

5. The anesthetic gas measurement module according to claim 3, characterized in that, Elastic arms (41) are provided on the outer peripheral edge of the holding plate (9) spaced apart from the lug, and the first protrusion portion (43) is provided at the free end of the elastic arm (41).

6. The anesthesia gas measurement module according to claim 5, wherein, The elastic arm (41) is formed by providing an L-shaped groove (45) near the outer peripheral edge of the holding plate (9).

7. The anesthetic gas measurement module according to claim 3, wherein, The first protrusion portion (43) is formed in a tip shape with a decreasing size towards the end.

8. The anesthetic gas measurement module according to claim 1, wherein An elastic snap piece (25) is provided on one of the support plate (7) and the water collecting box assembly (5), and a snap groove (31) is provided on the other of the support plate (7) and the water collecting box assembly (5), and the elastic snap piece (25) is snapped into the snap groove (31).

9. The anesthesia gas measurement module according to claim 1, wherein At least one notch (35) for a gas pipeline to pass through is formed on the circumferential edge of the support plate (7).

10. The anesthetic gas measurement module according to claim 1, wherein, At least two elastic alignment portions (33) are provided on the support plate (7). A radially outward second protrusion (33a) is formed at the free end of the elastic alignment portion (33). A central hole (37) is formed at the center of the holding plate (9). The elastic alignment portion (33) passes through the central hole (37) and holds the holding plate (9) in place by means of the second protrusion (33a).

11. The anesthetic gas measurement module according to claim 1, wherein, The support plate (7) is formed to include a circumferential edge portion (7a) and a central boss portion (7b) protruding relative to the circumferential edge portion (7a). The central boss portion (7b) is received in the through hole (11) and is coplanar with the outer side of the housing (3).

12. The anesthetic gas measurement module according to claim 1, wherein, A protrusion (47) is formed at a position 90° apart on one of the support plate (7) and the holding plate (9). A cavity (49) is correspondingly formed at a position 90° apart on the other of the support plate (7) and the holding plate (9). The protrusion (47) is received in the cavity (49).

13. The anesthetic gas measurement module according to claim 1, wherein An arc-shaped groove (51) for a gas pipeline to pass through is provided on the holding plate (9).

14. The anesthesia gas measurement module according to claim 1, wherein, The housing (3), the water collecting box assembly (5), the support plate (7) and the holding plate (9) are formed by plastic injection molding. The clamping structure is integrally formed with the housing (3), the water collecting box assembly (5), the support plate (7) and the holding plate (9).

15. A patient monitor, characterized in that, The patient monitor includes an anesthesia gas measurement module as described in any one of claims 1-14.

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