Blood pressure measurement device

Abstract

The present invention provides a blood pressure measuring device. The device includes: a connector; a plug, the other end of which includes a tapered portion in a conical shape and is connected to the connector in a pluggable and unplugable manner, and a convex portion is provided on the outer peripheral surface. When the other end is inserted into the connector, the convex portion is locked and fixed with a claw portion fixed to the housing; and a sealing ring, which is disposed between the inner peripheral surface of the connector and the outer peripheral surface of the plug, and has a first lip, a second lip provided on the outer peripheral side, and a third lip and a fourth lip provided on the inner peripheral side. A first recess is formed between the first lip and the third lip, a second recess is formed between the second lip and the fourth lip, a third recess is formed between the first lip and the second lip, and a fourth recess is formed between the third lip and the fourth lip. The depths of the first recess and the second recess are both greater than the depths of the third recess and the fourth recess. Thereby, the insertion and extraction force required for inserting and extracting the plug can be reduced, and the performance of the sealing ring against torsion can be improved.

Description

Technical Field

[0001] The present invention relates to the field of blood pressure measurement, and particularly to a blood pressure measurement device. Background Art

[0002] In the prior art, there is a known blood pressure measurement device having a plug, a connector, and a sealing ring disposed between the outer peripheral surface of the plug and the inner peripheral surface of the connector. In a cross-section passing through the central axis of the sealing ring, the cross-section of the sealing ring is in an O shape (the sealing ring is also referred to as an O-ring).

[0003] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art merely because these solutions are described in the background art part of the present invention. Summary of the Invention

[0004] The inventor found that in some cases (for example, to meet the requirements of certain safety specifications, etc.), it is necessary to appropriately increase the outer diameter of the plug. When the outer diameter of the plug increases, during the process of inserting the plug into the connector or pulling it out from the connector, the circumference of the portion where the plug contacts the O-ring becomes larger, and the friction force between the plug and the O-ring also increases accordingly. The insertion and extraction force required to insert the plug into the connector or pull it out from the connector becomes larger. The larger insertion and extraction force brings inconvenience to the user in using the blood pressure measurement device, and during the process of inserting the plug into the connector, the O-ring is prone to torsion, resulting in air leakage of the blood pressure measurement device.

[0005] To solve at least one of the above problems or other similar problems, an embodiment of the present invention provides a blood pressure measurement device, which can reduce the insertion and extraction force required for inserting and extracting the plug and improve the anti-torsion performance of the sealing ring.

[0006] According to a first aspect of an embodiment of the present invention, a blood pressure measurement device is provided. The blood pressure measurement device includes: a main body including a housing, a pressure supply unit, and a pressure detection unit disposed within the housing; a cuff including a fluid bag and an air tube, one end of the air tube being connected to the fluid bag; a connector held by the housing and connected to the pressure supply unit and the pressure detection unit in a manner that allows fluid to flow; a plug, one end of the plug being connected to the other end of the air tube, the other end of the plug including a tapered portion, the plug being connected to the connector in a pluggable and unplugable manner; and a sealing ring. The sealing ring is disposed between the inner circumferential surface of the connector and the outer circumferential surface of the plug. The sealing ring has a first lip, a second lip, a third lip, and a fourth lip. The first lip and the second lip are disposed on the outer circumferential side of the sealing ring and are crimped to the inner circumferential surface of the connector. The third lip and the fourth lip are disposed on the inner circumferential side of the sealing ring and are crimped to the outer circumferential surface of the plug. A first recess recessed in the insertion direction of the plug is formed between the first lip and the third lip. A second recess recessed in the extraction direction of the plug is formed between the second lip and the fourth lip. A third recess recessed away from the inner circumferential surface of the connector is formed between the first lip and the second lip. A fourth recess recessed away from the outer circumferential surface of the plug is formed between the third lip and the fourth lip. The depths of the first recess and the second recess are both greater than the depths of the third recess and the fourth recess. A convex portion is provided on the outer circumferential surface of the plug. When the other end of the plug is inserted into the connector, the convex portion is locked and fixed to a claw portion fixed to the housing.

[0007] According to a second aspect of an embodiment of the present invention, a blood pressure measurement device as described in the first aspect is provided, wherein the radius of the tapered portion gradually decreases along the insertion direction of the plug.

[0008] According to a third aspect of an embodiment of the present invention, a blood pressure measurement device as described in the second aspect is provided, wherein the difference between the radius at the maximum radius of the tapered portion and the radius at the minimum radius is greater than the depth of the fourth recess.

[0009] According to a fourth aspect of an embodiment of the present invention, a blood pressure measurement device as described in the first aspect is provided, wherein the first parting line of the sealing ring is disposed within the third recess, and the second parting line of the sealing ring is disposed within the fourth recess.

[0010] According to a fifth aspect of an embodiment of the present invention, there is provided a blood pressure measurement device as described in the fifth aspect, wherein, in a cross-section passing through the central axis of the sealing ring, the first lip and the second lip are symmetric with respect to a line connecting the first parting line and the second parting line, and the third lip and the fourth lip are symmetric with respect to a line connecting the first parting line and the second parting line.

[0011] According to a sixth aspect of an embodiment of the present invention, there is provided a blood pressure measurement device as described in the first aspect, wherein, in a cross-section passing through the central axis of the sealing ring, the first lip and the third lip are symmetric with respect to a line connecting the bottom end of the first recess and the bottom end of the second recess, and the second lip and the fourth lip are symmetric with respect to a line connecting the bottom end of the first recess and the bottom end of the second recess.

[0012] According to a seventh aspect of an embodiment of the present invention, there is provided a blood pressure measurement device as described in the first aspect, wherein the blood pressure measurement device further includes: a connector cap, the connector cap is fixed to the housing, has a hole for the plug to penetrate and insert, and a claw portion engaging with the convex portion is provided on the inner peripheral surface of the connector cap.

[0013] According to an eighth aspect of an embodiment of the present invention, there is provided a blood pressure measurement device as described in the seventh aspect, wherein more than 3 claw portions are provided at equal intervals on the inner peripheral surface of the connector cap.

[0014] According to a ninth aspect of an embodiment of the present invention, there is provided a blood pressure measurement device as described in the first aspect, wherein the dimensions of the plug and the sealing ring satisfy the following conditions: Dp > D1, Dp > D2, where Dp is the outer diameter at the portion where the plug contacts the sealing ring in a state where the other end of the plug is inserted into the connector, D1 is the inner diameter of the third lip of the sealing ring in a non-deformed state, and D2 is the inner diameter of the fourth lip of the sealing ring in a non-deformed state.

[0015] According to a tenth aspect of an embodiment of the present invention, there is provided a blood pressure measurement device as described in the first aspect, wherein the convex portion is provided at least at a position on the outer peripheral surface of the plug corresponding to the claw portion.

[0016] One of the beneficial effects of the embodiments of the present invention is that: by providing the structures of the sealing ring and the plug, the insertion and extraction force required for inserting and extracting the plug is reduced, and the performance of the sealing ring against torsion is improved.

[0017] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby. Within the spirit and terms of the appended claims, embodiments of the present invention include many variations, modifications, and equivalents.

[0018] Features described and / or illustrated for one embodiment can be used in the same or similar way in one or more other embodiments, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings included are used to provide a further understanding of the embodiments of the present invention, which form a part of the specification, illustrate the embodiments of the present invention, and, together with the written description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0020] Figure 1 is a schematic diagram of a blood pressure measuring device according to an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of some components of the blood pressure measuring device according to an embodiment of the present invention;

[0022] Figure 3 is according to an embodiment of the present invention Figure 2 a schematic diagram of the disassembled state of some of the components shown;

[0023] Figure 4 is according to an embodiment of the present invention Figure 2 a sectional view of some of the components shown;

[0024] Figure 5 is a sectional view of a sealing ring according to an embodiment of the present invention;

[0025] Figure 6 is Figure 5 an enlarged schematic diagram of the part shown by the dashed circle B of

[0026] Figure 7 a sectional view of a plug, a connector, and a sealing ring according to an embodiment of the present invention;

[0027] Figure 8 is a sectional view of a connector cap according to an embodiment of the present invention;

[0028] Figure 9 is another sectional view of the connector cap according to an embodiment of the present invention. Detailed Embodiments

[0029] Referring to the accompanying drawings, the foregoing and other features of the present invention will become apparent from the following description. In the description and drawings, specific embodiments of the present invention are specifically disclosed, which show some embodiments in which the principles of the present invention can be adopted. It should be understood that the present invention is not limited to the described embodiments. On the contrary, the present invention includes all modifications, variations, and equivalents falling within the scope of the appended claims.

[0030] In addition, in the drawings used in the following description, since each structural element is sized to be recognizable on the drawing surface, the scale is different for each structural element. The present invention is not limited to the number of structural elements, the shape of the structural elements, the ratio of the sizes of the structural elements, and the relative positional relationship of the structural elements described in these drawings.

[0031] In the embodiments of the present invention, terms such as "comprising", "including", "having", etc. mean the presence of the stated features, elements, components, or assemblies, but do not exclude the presence or addition of one or more other features, elements, components, or assemblies.

[0032] In the embodiments of the present invention, the singular forms "a", "the", etc. include the plural forms and should be broadly understood as "a kind of" or "a class of" rather than being limited to the meaning of "one"; in addition, the term "the" should be understood to include both the singular form and the plural form unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least partially according to...", and the term "based on" should be understood as "at least partially based on...", unless the context clearly indicates otherwise.

[0033] The embodiments of the present invention provide a blood pressure measurement device. Figure 1 This is a schematic diagram of the blood pressure measurement device 1 according to the embodiments of the present invention.

[0034] In at least one embodiment, as Figure 1 shown, the blood pressure measurement device 1 has a main body 11, a cuff 12, and a plug 14. The main body 11 includes a housing 111 and a pressure supply unit (not shown) and a pressure detection unit (not shown) provided in the housing 111. The cuff 12 includes a fluid bag 120 and an air tube 121. One end of the air tube 121 is connected to the fluid bag 120, and the other end is connected to one end of the plug 14.

[0035] Figure 2 This is a schematic diagram of some components of the blood pressure measurement device 1 according to the embodiments of the present invention. Figure 3 This is according to the embodiments of the present invention. Figure 2 This is a schematic diagram of the disassembled state of some components shown. Figure 4 This is according to the embodiments of the present invention. Figure 2A cross-sectional view of some of the components shown. Figures 2 to 4 As shown, the blood pressure measuring device 1 further includes: a connector 13 ( Figures 2~4 ) and sealing ring 15( Figure 3 , Figure 4 The connector 13 is held by the housing 111 and is connected to the pressure supply unit and the pressure detection unit in a manner that allows fluid to flow. The other end of the plug 14 includes a tapered portion 141 ( Figure 3 , Figure 4 ), the plug 14 is connected to the connector 13 in a pluggable manner, and a convex portion 142 is provided on the outer circumference of the plug 14. When the other end of the plug 14 is inserted into the connector 13, the convex portion 142 is locked and fixed with a claw portion 161 fixed to the housing 111. The sealing ring 15 is provided between the inner circumference of the connector 13 and the outer circumference of the plug 14.

[0036] Figure 5 FIG. 1 is a cross-sectional view of the sealing ring 15 according to the embodiment of the present invention. Figure 6 yes Figure 5 A schematic diagram of an enlarged portion of the portion indicated by the dotted circle B. Figures 4 to 6 As shown, the sealing ring 15 has a first lip 151, a second lip 152, a third lip 153 and a fourth lip 154. The first lip 151 and the second lip 152 are arranged on the outer peripheral side of the sealing ring 15 and are pressed against the inner peripheral surface of the connector 13. The third lip 153 and the fourth lip 154 ​​are arranged on the inner peripheral side of the sealing ring 15 and are pressed against the outer peripheral surface of the plug 14. A first recess 155 is formed between the first lip 151 and the third lip 153, which is recessed in the insertion direction X1 of the plug 14. A second recess 156 is formed between the second lip 152 and the fourth lip 154, which is recessed in the removal direction X2 of the plug 14. A third recess 157 is formed between the first lip 151 and the second lip 152, which is recessed in the direction away from the inner peripheral surface of the connector 13. A fourth recess 158 is formed between the third lip 153 and the fourth lip 154, which is recessed in the direction away from the outer peripheral surface of the plug 14. The depth d1 of the first recess 155 and the depth d2 of the second recess 156 are both greater than the depth d3 of the third recess 157 and the depth d4 of the fourth recess 158 .

[0037] In at least one embodiment, by setting the structure of the sealing ring 15 and the plug 14, the plugging and unplugging force required for plugging and unplugging the plug 14 can be reduced, and the performance of the sealing ring 15 in resisting torsion can be improved.

[0038] In at least one embodiment, the blood pressure measuring device 1 may be any type of blood pressure measuring device. For example, the blood pressure measuring device may be an electronic sphygmomanometer. The present application does not impose any specific limitation on the type of the device.

[0039] In at least one embodiment, the main body 11 is surrounded by a housing 111, and a pressure supply unit (not shown) and a pressure detection unit (not shown) are provided inside the housing 111. As Figure 1 shown, the main body 11 may also include a top plate 112, and components such as a display unit and an operation unit may be provided on the top plate 112.

[0040] In at least one embodiment, the cuff 12 is worn on the part to be measured to compress the part to be measured, and the main body 11 is used to measure the pressure of the cuff 12 and calculate the blood pressure according to the measurement result. By inserting the plug 14 into the connector 13 corresponding to the plug 14 provided on the main body 11, the cuff 12 and the main body 11 are connected. In the connected state, fluid can flow between the plug 14 and the connector 13.

[0041] In at least one embodiment, in a cross-section passing through the central axis OO' of the sealing ring 15, by setting the cross-section of the sealing ring 15 to include four lips and four recesses, when the plug 14 is inserted into the connector 13 or pulled out from the connector 13, the fulcrum of the sealing ring 15 can be increased, and the performance of the sealing ring 15 against torsion can be improved.

[0042] In at least one embodiment, the sealing ring 15 is provided in the sealing ring holding portion 131 of the connector 13. The sealing ring 15 hermetically seals the gap between the outer peripheral surface of the plug 14 and the inner peripheral surface of the connector 13.

[0043] In at least one embodiment, the sealing ring holding portion 131 is provided at the entrance of the connector 13 (such as Figure 4 the opening on the left side of the connector 13 shown), and it has a side wall portion 1311 and a bottom portion 1312. Among them, the first lip 151 and the second lip 152 of the sealing ring 15 are crimped with the side wall portion 1311, and the second lip 152 and the fourth lip 154 are crimped with the bottom portion 1312. Thus, through the side wall portion 1311 and the bottom portion 1312, the sealing ring 15 can be limited in the circumferential direction of the sealing ring 15 and in the insertion direction X1 of the plug 14 respectively, so that the possibility of the sealing ring 15 being twisted when the plug 14 is inserted into the connector 13 can be further reduced. However, the present application is not limited thereto, and the sealing ring 15 may also be provided at other positions of the connector 13.

[0044] In at least one embodiment, as Figure 6As shown, by making the depth d1 of the first recess 155 and the depth d2 of the second recess 156 both greater than the depth d3 of the third recess 157 and the depth d4 of the fourth recess 158, the sealing ring 15 is relatively easy to deform in the direction perpendicular to the central axis OO', and relatively difficult to deform in the direction parallel to the central axis OO'. Thus, the plug 14 can be easily inserted or removed, and the insertion and removal force required for inserting and removing the plug 14 is reduced. In addition, through the above structure, the thickness of the sealing ring 15 in the direction perpendicular to the central axis OO' can be ensured, thereby ensuring the service life of the sealing ring 15. Also, through the above structure, the sealing ring 15 can be prevented from twisting without reducing the compression amount, hardness, etc. of the sealing ring 15, thereby preventing air leakage and other situations.

[0045] In at least one embodiment, the depth d1 of the first recess 155 may be equal to the depth d2 of the second recess, but the present application is not limited thereto, and the depth d1 of the first recess 155 may also be unequal to the depth d2 of the second recess. The depth d3 of the third recess 157 may be equal to the depth d4 of the fourth recess 158, but the present application is not limited thereto, and the depth d3 of the third recess 157 may also be unequal to the depth d4 of the fourth recess 158.

[0046] In at least one embodiment, as Figure 5 shown, the first parting line PL1 of the sealing ring 15 is disposed within the third recess 157, and the second parting line PL2 of the sealing ring 15 is disposed within the fourth recess 158. By disposing the parting line (for example, the parting line includes the first parting line PL1 and the second parting line PL2) within the recesses of the sealing ring (for example, the third recess 157 and the fourth recess 158), the parting line can be prevented from being located at the position where the sealing ring 15 abuts against the plug 14 or the connecting portion 13, that is, the parting line can be prevented from being located at the position where the sealing ring 15 functions as a seal. Thereby, it is beneficial to ensure the sealing performance of the sealing ring 15. In addition, during the process of inserting the plug 14 into the connecting portion 13, the parting line will not contact the plug 14. Therefore, even if there are burrs or the like at the parting line of the sealing ring 15, the frictional resistance between the plug 14 and the sealing ring 15 will not be increased. Through the above structure, the requirements for the manufacturing process of the sealing ring 15 can be reduced, the insertion and removal force of the plug 14 can be reduced, and the possibility of the sealing ring 15 twisting can be reduced.

[0047] In at least one embodiment, the parting line is formed during the process of manufacturing the sealing ring 15 using a mold. For example, the mold has two parts that are movable in the X1 and X2 directions, the mold is of a hollow structure, and when the two parts are butted, the material of the sealing ring 15 is injected into the hollow structure. After the material solidifies, the two parts are each moved in the X1 and X2 directions to separate them; at the position where the two parts are butted, due to the unevenness at the joint, the parting line is formed.

[0048] In at least one embodiment, as Figure 6 shown, in the cross-section passing through the central axis OO’ of the sealing ring 15, the first lip 151 and the second lip 152 are symmetric with respect to the connection line PL of the first parting line PL1 and the second parting line PL2, and the third lip 153 and the fourth lip 154 are symmetric with respect to the connection line PL of the first parting line PL1 and the second parting line PL2. Thus, when assembling the sealing ring 15, it is not necessary to distinguish the front and back sides of the sealing ring 15, which can simplify the assembly process. However, the present application is not limited thereto, and the sealing ring 15 may also have other structures.

[0049] In at least one embodiment, as Figure 6 shown, in the cross-section passing through the central axis OO’ of the sealing ring 15, the first lip 151 and the third lip 153 are symmetric with respect to the connection line AA between the bottom ends of the first recess 155 and the second recess 156, and the second lip 152 and the fourth lip 154 are symmetric with respect to the connection line AA between the bottom ends of the first recess 155 and the second recess 156. Thus, the gap between the plug 14 and the connector 13 can be stably sealed. However, the present application is not limited thereto, and the sealing ring 15 may also have other structures.

[0050] In at least one embodiment, the sealing ring 15 is made of silicone rubber, whereby the sealing effect and service life of the sealing ring 15 can be ensured. However, the present application is not limited thereto, and the sealing ring 15 may also be made of other elastic materials.

[0051] In at least one embodiment, the other end of the plug 14 is referred to as the front end of the plug 14, that is, the end of the plug 14 in the insertion direction X1 as Figure 4 shown is referred to as the front end of the plug 14. By making the front end of the plug 14 include a tapered portion 141, during the process of inserting the plug 14 into the connector 15, the front end of the plug 14 can smoothly pass through the sealing ring 15. Thus, the insertion force required for inserting the plug 14 into the connector 13 can be reduced.

[0052] Figure 7 is a cross-sectional view of the plug 14, the connector 13, and the sealing ring 15 according to an embodiment of the present invention. In at least one embodiment, as Figure 7 shown, along the insertion direction X1 of the plug 14, the radius Dr of the tapered portion 141 gradually decreases. However, the present application is not limited thereto, and along the insertion direction X1 of the plug 14, the radius Dr of the tapered portion 141 may also have other changing trends.

[0053] In at least one embodiment, the difference c between the radius at the maximum radius Dr of the tapered portion 141 and the radius at the minimum radius is greater than the depth d4 of the fourth recess 158. Thus, during the process of inserting the plug 14 into the connector 13, it is possible to prevent the front end of the plug 14 from touching the lip of the sealing ring 15, thereby avoiding the occurrence of an increase in the insertion force caused by the front end of the plug 14 touching the lip of the sealing ring 15.

[0054] In at least one embodiment, as Figure 7 shown, the dimensions of the plug 14 and the sealing ring 15 satisfy the following conditions: Dp > D1, Dp > D2, where Dp is the outer diameter at the portion where the plug 14 contacts the sealing ring 15 in the state where the other end of the plug 14 is inserted into the connector 13, D1 is the inner diameter of the third lip 153 of the sealing ring 15 when the sealing ring 15 is not deformed, and D2 is the inner diameter of the fourth lip 154 of the sealing ring 15 when the sealing ring 15 is not deformed. Thus, in the state where the plug 14 is inserted into the connector 13, the sealing ring 15 can be appropriately elastically deformed in the direction perpendicular to the central axis OO' of the sealing ring 15, thereby ensuring the reliability of the seal.

[0055] In at least one embodiment, by engaging and fixing the convex portion 142 of the plug 14 with the claw portion 161 fixed to the housing 111, it is possible to prevent the plug 14 from slipping out of the connector 13 when the pressure inside the connector 13 increases, thereby ensuring the reliability of the blood pressure measuring device 1 during use.

[0056] In at least one embodiment, the claw portion 161 can be fixed to the housing 111 in any manner. For example, the claw portion 161 can be integrally formed with the housing 111, or the claw portion 161 can be fixed to the housing 111 through the connector cap 16 described later.

[0057] In at least one embodiment, as Figure 2 and Figure 3 shown, the blood pressure measuring device 1 may further include a connector cap 16. The connector cap 16 is fixed to the housing 111 and has a hole 162 through which the plug penetrates and is inserted. The inner peripheral surface of the connector cap 16 is provided with a claw portion 161 that engages with the convex portion 142 ( Figure 3 and Figure 4 ).

[0058] In at least one embodiment, the connector cap 16 can be fixed to the housing 111 in any manner. For example, the connector cap 16 can be fixed to the housing 111 by a snap-fit method, or the connector cap 16 can be fixed to the housing 111 by a screwing method, or the connector cap 16 can also be integrally formed on the housing 111, and so on.

[0059] Figure 8It is a cross-sectional view of the connector cap 16 according to an embodiment of the present invention. Figure 9 It is another cross-sectional view of the connector cap 16 according to an embodiment of the present invention. Figure 8 and Figure 9 show a cross-section of the connector cap 16 perpendicular to the central axis OO' of the sealing ring 15. As Figure 8 and Figure 9 shown, three or more claw portions 161 are provided at equal intervals on the inner peripheral surface of the connector cap 16. By providing three or more claw portions 161 on the inner peripheral surface of the connector cap 16, the plug 14 can be stably held, and the position of the plug 14 in the insertion and extraction directions can be reliably restricted. By arranging three or more claw portions 161 at equal intervals, the acting force can be evenly distributed on the convex portion 142 and the connector cap 16, so that the plug 14 can be held more reliably.

[0060] In at least one embodiment, the convex portion 142 is provided at least at a position on the outer peripheral surface of the plug 14 corresponding to the claw portion 161. For example, the convex portion 142 may be three or more components provided at equal intervals on the outer peripheral surface of the plug 14 corresponding to the claw portion 161, or, as Figure 3 shown, the convex portion 142 may also be a continuous annular component provided on the outer peripheral surface of the plug 14.

[0061] In at least one embodiment, when the convex portion 142 is pressed against the claw portion 161, at least one of the convex portion 142 and the claw portion 161 undergoes elastic deformation. Thus, the convex portion 142 can move in the insertion direction X1 to a position engaged with the claw portion 161, or the convex portion 142 can move in the extraction direction X2 to a position separated from the claw portion 161. However, the present application is not limited thereto, and the convex portion 142 and the claw portion 161 may also be engaged or separated by other means.

[0062] According to the above at least one embodiment, by setting the structures of the sealing ring 15 and the plug 14, the insertion and extraction force required for inserting and extracting the plug 14 can be reduced, and the performance of the sealing ring 15 against torsion can be improved.

[0063] The present invention has been described above in conjunction with specific embodiments, but those skilled in the art should understand that these descriptions are exemplary and not a limitation on the protection scope of the present invention. Those skilled in the art can make various variations and modifications to the present invention according to the spirit and principle of the present invention, and these variations and modifications are also within the scope of the present invention.

Claims

1. A blood pressure measuring device, comprising: A main body, the main body comprising a housing and a pressure supply part and a pressure detection part arranged in the housing; A cuff, the cuff comprising a fluid bag and an air tube, one end of the air tube being connected to the fluid bag; a connector held by the housing and connected to the pressure supply unit and the pressure detection unit in a manner that allows fluid to flow; a plug, one end of which is connected to the other end of the air pipe, the other end of which includes a tapered portion, the plug being connected to the connector in a pluggable manner, and Sealing ring, The invention is characterized in that the sealing ring is arranged between the inner peripheral surface of the connector and the outer peripheral surface of the plug, and the sealing ring has a first lip, a second lip, a third lip and a fourth lip. The first lip and the second lip are arranged on the outer peripheral side of the sealing ring and are pressed against the inner peripheral surface of the connector. The third lip and the fourth lip are arranged on the inner peripheral side of the sealing ring and are pressed against the outer peripheral surface of the plug. A first recessed portion that is recessed toward the plug insertion direction is formed between the first lip and the third lip, and a second recessed portion that is recessed toward the plug removal direction is formed between the second lip and the fourth lip. A third recessed portion that is recessed in a direction away from the inner peripheral surface of the connector is formed between the first lip portion and the second lip portion, and a fourth recessed portion that is recessed in a direction away from the outer peripheral surface of the plug is formed between the third lip portion and the fourth lip portion. The depth of the first recess and the depth of the second recess are both greater than the depth of the third recess and the depth of the fourth recess, and A convex portion is provided on the outer peripheral surface of the plug, and when the other end of the plug is inserted into the connector, the convex portion is locked and fixed with a claw portion fixed to the housing.

2. The blood pressure measuring device according to claim 1, characterized in that, Along the insertion direction of the plug, the radius of the tapered portion gradually decreases.

3. The blood pressure measuring device according to claim 2, characterized in that, A difference between a radius at a maximum radius of the tapered portion and a radius at a minimum radius of the tapered portion is greater than a depth of the fourth recess.

4. The blood pressure measuring device according to claim 1, characterized in that, The first parting line of the seal ring is arranged in the third recessed portion, and the second parting line of the seal ring is arranged in the fourth recessed portion.

5. The blood pressure measuring device according to claim 4, characterized in that, On a cross section passing through the central axis of the sealing ring, the first lip and the second lip are symmetrical relative to a line connecting the first parting line and the second parting line, and the third lip and the fourth lip are symmetrical relative to a line connecting the first parting line and the second parting line.

6. The blood pressure measuring device according to claim 1, characterized in that, On the cross section passing through the central axis of the sealing ring, The first lip and the third lip are symmetrical with respect to a line connecting a bottom end of the first recess and a bottom end of the second recess, The second lip and the fourth lip are symmetrical with respect to a line connecting a bottom end of the first recess and a bottom end of the second recess.

7. The blood pressure measuring device according to claim 1, characterized in that, The blood pressure measuring device further comprises: A connector cap is fixed to the housing and has a hole through which the plug is inserted. The inner peripheral surface of the connector cap is provided with the claw portion engaged with the convex portion.

8. The blood pressure measuring device according to claim 7, wherein Three or more claws are provided at equal intervals on the inner peripheral surface of the connector cap.

9. The blood pressure measuring device according to claim 1, characterized in that, The dimensions of the plug and the sealing ring satisfy the following conditions: Dp > D1, Dp > D2, where Dp is the outer diameter at the portion where the plug contacts the sealing ring when the other end of the plug is inserted into the connector, D1 is the inner diameter of the third lip of the sealing ring when the sealing ring is not deformed, and D2 is the inner diameter of the fourth lip of the sealing ring when the sealing ring is not deformed.

10. The blood pressure measuring device according to claim 1, characterized in that, The convex portion is provided at least at a position on the outer peripheral surface of the plug corresponding to the claw portion.

Images