Measuring instruments

Abstract

The present invention relates to the field of medical device technology, and discloses a measuring instrument, comprising: a main unit having a first limiting structure, the first limiting structure including a limiting socket; an tracheal head including a tracheal plug suitable for being inserted into the limiting socket and sealed therewith; a first magnetic component, provided at one of the first limiting structure and the tracheal head; a second magnetic component, provided at the other of the first limiting structure and the tracheal head, and after the tracheal plug is inserted into the limiting socket, a magnetic attraction is generated between the first magnetic component and the second magnetic component. When the present invention needs to measure blood pressure, the tracheal plug is inserted into the limiting socket and sealed therewith, and the magnetic attraction generated between the first magnetic component and the second magnetic component can firmly fix the tracheal head in the limiting socket. During the process of measuring blood pressure, the tracheal head will not fall off from the limiting socket, which is convenient for users to measure blood pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to measuring instruments. Background Art

[0002] Hypertension is one of the most common medical diseases. It is widespread, affecting everyone from the elderly to the young. Patients with hypertension need to pay close attention to their physical condition and gradually treat the disease through diet and lifestyle changes. To better monitor the patient's blood pressure, a sphygmomanometer was developed.

[0003] A sphygmomanometer is an instrument used to measure blood pressure. Existing sphygmomanometers are categorized as mercury sphygmomanometers, electronic sphygmomanometers, and spring-type sphygmomanometers. Spring-type sphygmomanometers and electronic sphygmomanometers are more commonly used. Compared to spring-type sphygmomanometers, electronic sphygmomanometers are significantly more intelligent, user-friendly, and more user-friendly.

[0004] In the related art, the tracheal head of the blood pressure monitor cuff is connected to the air hole on the main unit by plugging, and the air tightness is ensured by a sealing ring. After plugging, when the tracheal head is pulled by external force, the tracheal head is easy to fall off from the air hole. When measuring blood pressure, if the tracheal head falls off, it is necessary to reinsert the tracheal head into the air hole, which results in a poor user experience. Summary of the Invention

[0005] In view of this, the present invention provides a measuring instrument to solve the problem that the tracheal head is easily dropped from the pore.

[0006] The present invention provides a measuring instrument, comprising:

[0007] The host has a first limiting structure, wherein the first limiting structure includes a limiting hole;

[0008] The tracheal head comprises a tracheal plug adapted to be inserted into the limiting plug hole and sealed therewith;

[0009] a first magnetic member, disposed on one of the first limiting structure and the tracheal head;

[0010] The second magnetic component is arranged on the other of the first limiting structure and the tracheal head. After the tracheal plug is inserted into the limiting jack, a magnetic attraction force is generated between the first magnetic component and the second magnetic component.

[0011] Beneficial effect: When blood pressure needs to be measured, the tracheal plug is inserted into the limiting socket and sealed with the limiting socket. The magnetic attraction force generated between the first magnetic component and the second magnetic component can firmly fix the tracheal head in the limiting socket. During the blood pressure measurement process, the tracheal head will not fall off from the limiting socket, which is convenient for users to measure blood pressure.

[0012] In an optional embodiment, the first magnetic attraction member is a magnet, and the second magnetic attraction member is made of ferromagnetic material.

[0013] Beneficial effects: When measuring blood pressure, the tracheal plug is inserted into the limiting socket and sealed with the limiting socket. The first magnetic component generates a magnetic attraction force on the second magnetic component, which can firmly fix the tracheal head in the limiting socket. During the blood pressure measurement process, the tracheal head will not fall off from the limiting socket, which is convenient for users to measure blood pressure.

[0014] In an optional embodiment, the first magnetic component is arranged on the first limiting structure, and the second magnetic component is arranged on the tracheal head.

[0015] Beneficial effect: The first magnetic component is set on the first limiting structure, that is, the magnet is set on the first limiting structure, and the second magnetic component is made of ferromagnetic material. It is set on the tracheal head, which can prevent the tracheal head from generating adsorption force with other components after being pulled out from the main unit, making it more convenient to use.

[0016] In an optional embodiment, the first limiting structure also includes a first abutting surface, the limiting socket and the first magnetic component are arranged on the first abutting surface, and the tracheal head also includes a second limiting structure located outside the tracheal plug. When the tracheal plug is inserted into the limiting socket, the second limiting structure abuts against the first abutting surface, and the second magnetic component is arranged on the second limiting structure.

[0017] Beneficial effect: When blood pressure needs to be measured, the tracheal plug is inserted into the limiting socket and sealed with the limiting socket. At this time, the second limiting structure abuts against the first abutting surface, and the magnetic attraction force generated between the first magnetic component and the second magnetic component can firmly fix the tracheal head in the limiting socket. During the blood pressure measurement process, the tracheal head will not fall off from the limiting socket, which is convenient for users to measure blood pressure.

[0018] In an optional embodiment, the first limiting structure further includes a stop structure, the stop structure including a stop block and a stop strip extending from the stop block, a gap being formed between the stop strip and the first abutting surface, and the first magnetic member is located at least at a position where the first abutting surface and the stop strip are opposite to each other;

[0019] The second limiting structure is suitable for being screwed into between the stopping strip and the first abutting surface from a gap between an end of the stopping strip away from the stopping block and the first abutting surface.

[0020] Beneficial effect: When blood pressure needs to be measured, first insert the tracheal plug into the limiting socket so that the second limiting structure is against the first abutment surface. At this time, there is a magnetic attraction between the first magnetic part and the second magnetic part. Then rotate the tracheal head, and the tracheal plug and the second limiting structure will rotate as they rotate, so that the second limiting structure will be screwed from the gap between the end of the stop bar away from the stop block and the first abutment surface into the gap between the stop bar and the first abutment surface. When the second limiting structure is rotated to between the stop bar and the first abutment surface, the magnetic attraction between the first magnetic part and the second magnetic part can prevent the tracheal head from rotating in the opposite direction and leaving the stop bar. At the same time, the stop bar will block the second limiting structure, so that the tracheal head can be firmly fixed in the limiting socket. During the process of measuring blood pressure, the tracheal head will not fall off from the limiting socket, which is convenient for users to measure blood pressure.

[0021] Since the second rotating structure only needs to rotate between the stop bar and the first abutting surface, the stop bar can block the second limiting structure. Therefore, there is no need to rotate the second rotating structure at a large angle. At the same time, the first magnetic component does not need to be set to a large length, and the corresponding stop bar does not need to be set to a large length.

[0022] In an optional embodiment, the first magnetic member extends on the first abutting surface from a position extending from the stop bar to a position close to the stop block and opposite to the stop bar.

[0023] Beneficial effect: Since the various preparations before measuring blood pressure may cause the second limiting structure to slightly move away from the rotated position, the first magnetic part is extended from the position extending from the stop bar on the first abutting surface to the position close to the stop block and opposite to the stop bar, that is, the magnetic area generated by the first magnetic part is larger than the end area of the second magnetic part. When the second limiting structure slightly moves away from the rotated position, it can still effectively attract the second magnetic part.

[0024] In an optional embodiment, the stop block has a first stop surface and a second stop surface, the first stop surface is used to prevent the tracheal head from rotating in a first direction, and after the tracheal head rotates in a second direction opposite to the first direction, the second limiting structure abuts against the second stop surface, and the second stop surface is used to prevent the tracheal head from continuing to rotate in the second direction.

[0025] Beneficial effect: The first stop surface can prevent the tracheal head from rotating in the first direction. Therefore, after the tracheal plug is inserted into the limiting hole, the tracheal head can only rotate in the second direction opposite to the first direction, which can prevent the user from rotating the tracheal head in the wrong direction. The second stop surface can prevent the tracheal head from continuing to rotate in the second direction, which can prevent the tracheal head from continuing to rotate after it has been rotated into place.

[0026] In an optional embodiment, the first abutting surface is provided with a first limiting groove, the first magnetic member is provided in the first limiting groove, and an end portion of the first magnetic member is flush with the first abutting surface;

[0027] The second limiting structure has a second abutting surface suitable for abutting against the first abutting surface. The second limiting structure is provided with a second limiting groove. The second magnetic attraction member is arranged in the second limiting groove and its end is flush with the second abutting surface.

[0028] Beneficial effect: When blood pressure needs to be measured, first insert the tracheal plug into the limiting socket so that the second abutting surface abuts against the first abutting surface, then rotate the tracheal head. The tracheal plug and the second limiting structure rotate as they do so, so that the second limiting structure rotates from the gap between the end of the stop bar away from the stop block and the first abutting surface into the gap between the stop bar and the first abutting surface. After rotating into place, the magnetic attraction generated between the first magnetic component and the second magnetic component can prevent the tracheal head from rotating in the opposite direction and leaving the stop bar. At the same time, the stop bar blocks the second limiting structure, which can firmly fix the tracheal head in the limiting socket. During the blood pressure measurement process, the tracheal head will not fall off the limiting socket, which is convenient for users to measure blood pressure. By making the end of the first magnetic component flush with the first abutting surface and the end of the second magnetic component flush with the second abutting surface, the end faces of the first abutting surface and the second limiting structure are flat, and the structure is simple and reliable.

[0029] In an optional embodiment, at least two second limiting structures are provided, and correspondingly, at least two stop structures are provided and are rotationally symmetrical.

[0030] Beneficial effect: By providing at least two second limiting structures and two stop structures that are rotationally symmetrical, the force on the tracheal head can be made more balanced.

[0031] In an optional embodiment, two second limiting structures are symmetrically provided, and correspondingly, two stopping structures are provided.

[0032] Beneficial effect: By symmetrically providing two second limiting structures and providing two stop structures that are rotationally symmetrical relative to the center of the limiting socket, the force on the tracheal head can be made more balanced. Specifically, when blood pressure needs to be measured, the tracheal plug is first inserted into the limiting socket so that the two second limiting structures respectively abut against the first abutting surface. Then, the tracheal head is rotated. The tracheal plug and the two second limiting structures rotate accordingly, so that one of the second limiting structures is screwed into the gap between the end of one of the stop bars away from the stop block and the first abutting surface, and the other second limiting structure is screwed into the gap between the end of the other stop bar away from the stop block and the first abutting surface. After being rotated into place, the magnetic attraction generated between the first magnetic element and the second magnetic element can prevent the tracheal head from rotating in the opposite direction and leaving the stop bar. At the same time, the stop bar blocks the second limiting structure, so that the tracheal head can be firmly fixed in the limiting socket. During the blood pressure measurement process, the tracheal head will not fall off from the limiting socket, which is convenient for users to measure blood pressure.

[0033] In an optional embodiment, the stop strip has an arc-shaped contact edge suitable for contacting the outer peripheral surface of the tracheal head.

[0034] Beneficial effect: Since the contact edge of the stop strip can maintain contact with the outer peripheral surface of the tracheal head, the two stop strips cooperate to limit the rotation of the tracheal head and prevent the tracheal head from shaking.

[0035] In an optional embodiment, the side wall of the main unit is recessed to form a limiting groove, the first abutting surface constitutes the bottom wall of the limiting groove, there is a gap between the stop strip and the side wall of the limiting groove, and the second limiting structure has a radial dimension of the tracheal head that is larger than a radial dimension of the stop strip of the limiting socket.

[0036] Beneficial effect: The radial size of the second limiting structure in the tracheal head is larger than the radial size of the stop strip in the limiting hole, and the second limiting structure can be seen through the gap. Therefore, it is possible to observe whether the second limiting structure is rotated into place through the gap between the stop strip and the side wall of the limiting groove.

[0037] In an optional embodiment, the tracheal plug has an insertion end suitable for inserting into the limiting plug hole, and the outer diameter of the tracheal plug gradually increases from the insertion end toward the direction away from the insertion end.

[0038] Beneficial effect: The outer diameter of the tracheal plug gradually increases from the insertion end to the direction away from the insertion end, which can guide the installation of the tracheal plug and facilitate the smooth insertion of the tracheal plug into the limiting socket.

[0039] In an optional embodiment, a sealing ring is provided in the limiting socket, and the outer diameter of the insertion end is larger than the inner diameter of the sealing ring.

[0040] Beneficial effect: by making the outer diameter of the insertion end larger than the inner diameter of the sealing ring, when the tracheal plug is installed in place, the sealing ring is squeezed and deformed, thereby ensuring sealing.

[0041] In an optional embodiment, the tracheal head is provided with a friction portion suitable for gripping.

[0042] Beneficial effect: By providing the friction portion, it is convenient for the user to hold and rotate the tracheal head. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0044] Figure 1 This is a front view of a measuring instrument according to an embodiment of the present invention when the tracheal head is just inserted into the limiting socket;

[0045] Figure 2 for Figure 1 A front sectional view of the first limiting structure;

[0046] Figure 3 This is a front view of a measuring instrument according to an embodiment of the present invention when the tracheal tip is inserted into the limiting socket and rotated into position;

[0047] Figure 4 This is a front cross-sectional view of a measuring instrument according to an embodiment of the present invention when the tracheal head is inserted into the limiting socket and rotated into position;

[0048] Figure 5 Schematic diagram of the structure of the tracheal head;

[0049] Figure 6 for Figure 5 Longitudinal section of the tracheal head;

[0050] Figure 7 is a structural schematic diagram of the first limiting structure;

[0051] Figure 8 This is a schematic diagram of the structure after the tracheal head is inserted into the limiting hole;

[0052] Figure 9 for Figure 8 A longitudinal section view of

[0053] Figure 10 for Figure 9 Enlarged view of point A in the middle.

[0054] Description of reference numerals:

[0055] 1. First limiting structure; 101. Limiting socket; 102. First abutting surface; 103. Stopping structure; 1031. Stop block; 10311. First stopping surface; 10312. Second stopping surface; 1032. Stopping strip; 10321. Contact edge; 104. Gap; 2. Tracheal head; 201. Tracheal plug; 2011. Insertion end; 202. Second limiting structure; 2021. Second abutting surface; 203. Friction portion; 3. First magnetic member; 4. Second magnetic member; 5. Sealing ring. DETAILED DESCRIPTION

[0056] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0057] In the related art, the tracheal head of the blood pressure monitor cuff is connected to the air hole on the main unit by plugging, and the air tightness is ensured by a sealing ring. After plugging, when the tracheal head is pulled by external force, the tracheal head is easy to fall off from the air hole. When measuring blood pressure, if the tracheal head falls off, it is necessary to reinsert the tracheal head into the air hole, which results in a poor user experience.

[0058] The following combination Figures 1 to 10 , describing embodiments of the present invention.

[0059] According to an embodiment of the present invention, on the one hand, a measuring instrument is provided, including a main unit, a tracheal head 2, a first magnetic component 3 and a second magnetic component 4.

[0060] The main unit has a first limiting structure 1, which includes a limiting socket 101; the tracheal head 2 includes a tracheal plug 201 suitable for being inserted into the limiting socket 101 and sealed therewith; the first magnetic component 3 is arranged on one of the first limiting structure 1 and the tracheal head 2; the second magnetic component 4 is arranged on the other of the first limiting structure 1 and the tracheal head 2. After the tracheal plug 201 is inserted into the limiting socket 101, a magnetic attraction force is generated between the first magnetic component 3 and the second magnetic component 4.

[0061] In this embodiment, when blood pressure needs to be measured, the tracheal plug 201 is inserted into the limiting socket 101 and sealed with the limiting socket 101. The magnetic force generated between the first magnetic component 3 and the second magnetic component 4 can firmly fix the tracheal head 2 in the limiting socket 101. During the blood pressure measurement process, the tracheal head 2 will not fall off from the limiting socket 101, which is convenient for users to measure blood pressure.

[0062] In a specific embodiment, the measuring instrument may be a blood pressure monitor.

[0063] In one embodiment, the first magnetic member 3 is a magnet, and the second magnetic member 4 is made of ferromagnetic material.

[0064] In this embodiment, when blood pressure is to be measured, the tracheal plug 201 is inserted into the limiting socket 101 and sealed with the limiting socket 101. The first magnetic component 3 generates a magnetic attraction force on the second magnetic component 4, which can firmly fix the tracheal head 2 in the limiting socket 101. During the blood pressure measurement process, the tracheal head 2 will not fall off from the limiting socket 101, which is convenient for users to measure blood pressure.

[0065] Furthermore, compared to the solution in which both the first magnetic member 3 and the second magnetic member 4 are magnets, the second magnetic member 4 is made of ferromagnetic material, which can reduce costs.

[0066] In an embodiment not shown in the figures, the first magnetic member 3 can be made of a ferromagnetic material, and the second magnetic member 4 can be a magnet. To measure blood pressure, the tracheal plug 201 is inserted into the limiting socket 101 and sealed to the limiting socket 101. The second magnetic member 4 generates a magnetic attraction force on the first magnetic member 3, which can firmly fix the tracheal tip 2 in the limiting socket 101. During the blood pressure measurement process, the tracheal tip 2 will not fall off the limiting socket 101, making it easier for the user to measure blood pressure.

[0067] In another embodiment not shown in the figures, the first magnetic member 3 can be a magnet, and the second magnetic member 4 can also be a magnet. When blood pressure needs to be measured, the tracheal plug 201 is inserted into the limiting socket 101 and sealed with the limiting socket 101. The magnetic attraction generated between the first magnetic member 3 and the second magnetic member 4 can firmly fix the tracheal tip 2 in the limiting socket 101. During the blood pressure measurement process, the tracheal tip 2 will not fall out of the limiting socket 101, making it easier for the user to measure blood pressure.

[0068] In one embodiment, the first magnetic component 3 is disposed on the first limiting structure 1 , and the second magnetic component 4 is disposed on the tracheal head 2 .

[0069] In this embodiment, the first magnetic component 3 is arranged on the first limiting structure 1, that is, the magnet is arranged on the first limiting structure 1, and the second magnetic component 4 is made of ferromagnetic material and is arranged on the tracheal head 2. This can prevent the tracheal head 2 from generating adsorption force with other components after being pulled out from the main unit, making it more convenient to use.

[0070] Of course, in an embodiment not shown in the figures, the first magnetic component 3 can be set on the tracheal head 2, and the second magnetic component 4 can be set on the first limiting structure 1.

[0071] In one embodiment, Figures 2 to 4 The first limiting structure 1 includes a first abutting surface 102, the limiting socket 101 and the first magnetic component 3 are arranged on the first abutting surface 102, the tracheal head 2 includes a second limiting structure 202 located outside the tracheal plug 201, when the tracheal plug 201 is inserted into the limiting socket 101, the second limiting structure 202 abuts against the first abutting surface 102, and the second magnetic component 4 is arranged on the second limiting structure 202.

[0072] In this embodiment, when blood pressure needs to be measured, the tracheal plug 201 is inserted into the limiting socket 101 and sealed with the limiting socket 101. At this time, the second limiting structure 202 is against the first abutting surface 102, and the magnetic attraction force generated between the first magnetic component 3 and the second magnetic component 4 can firmly fix the tracheal head 2 in the limiting socket 101. During the blood pressure measurement process, the tracheal head 2 will not fall off from the limiting socket 101, which is convenient for users to measure blood pressure.

[0073] In an embodiment not shown in the figures, the first magnetic member 3 can be disposed in the limiting plug hole 101 , and the second magnetic member 4 can be disposed in the tracheal plug 201 .

[0074] In one embodiment, Figure 3 and Figure 4 As shown, the first limiting structure 1 further includes a stop structure 103, which includes a stop block 1031 and a stop strip 1032 extending from the stop block 1031. In a direction perpendicular to the first abutting surface 102, a gap is formed between the stop strip 1032 and the first abutting surface 102. The first magnetic member 3 is located at least at a position opposite to the first abutting surface 102 and the stop strip 1032.

[0075] The second limiting structure 202 is adapted to be screwed into between the stopping strip 1032 and the first abutting surface 102 from a gap between an end of the stopping strip 1032 away from the stopping block 1031 and the first abutting surface 102 .

[0076] In this embodiment, when blood pressure needs to be measured, the tracheal plug 201 is first inserted into the limiting plug hole 101, so that the second limiting structure 202 is against the first abutting surface 102. At this time, there is a magnetic attraction between the first magnetic component 3 and the second magnetic component 4. Then, the tracheal head 2 is rotated, and the tracheal plug 201 and the second limiting structure 202 rotate with it, so that the second limiting structure 202 is screwed from the gap between the end of the stop bar 1032 away from the stop block 1031 and the first abutting surface 102 into the gap between the stop bar 1032 and the first abutting surface 102. Between the abutment surfaces 102, when the second limiting structure 202 rotates to between the stop bar 1032 and the first abutment surface 102, the magnetic attraction between the first magnetic component 3 and the second magnetic component 4 can prevent the tracheal head 2 from rotating in the opposite direction and leaving the stop bar 1032. At the same time, the stop bar 1032 blocks the second limiting structure 202, and the tracheal head 2 can be firmly fixed in the limiting socket 101. During the blood pressure measurement process, the tracheal head 2 will not fall off from the limiting socket 101, which is convenient for users to measure blood pressure.

[0077] Since the second rotating structure only needs to rotate between the stop bar 1032 and the first abutting surface 102, the stop bar 1032 can block the second limiting structure 202. Therefore, there is no need to rotate the second rotating structure by a large angle. At the same time, the first magnetic component 3 does not need to be set to a large length, and the corresponding stop bar 1032 does not need to be set to a large length.

[0078] In one embodiment, the stop block 1031 is connected to the first abutting surface 102 and protrudes from the first abutting surface 102. In an embodiment not shown in the figure, the stop block 1031 may not be connected to the first abutting surface 102, and a certain gap is left between the stop block 1031 and the first abutting surface 102.

[0079] In one embodiment, the first magnetic member 3 extends on the first abutting surface 102 from a position extending from the stopping strip 1032 to a position close to the stopping block 1031 and opposite to the stopping strip 1032 .

[0080] In this embodiment, since the various preparations before measuring blood pressure may cause the second limiting structure 202 to slightly move away from the rotated position, the first magnetic component 3 is extended from the position extending from the stop bar 1032 on the first abutting surface 102 to a position close to the stop block 1031 and opposite to the stop bar 1032, that is, the area of the magnetic area generated by the first magnetic component 3 is larger than the end area of the second magnetic component 4. When the second limiting structure 202 slightly moves away from the rotated position, it can still effectively attract the second magnetic component 4.

[0081] When blood pressure needs to be measured, first insert the tracheal plug 201 into the limiting plug hole 101, so that the second limiting structure 202 abuts against the first abutting surface 102. At this time, there is a magnetic attraction between the first magnetic component 3 and the second magnetic component 4. Then rotate the tracheal head 2, and the tracheal plug 201 and the second limiting structure 202 rotate with it, so that the second limiting structure 202 is screwed into the gap between the stop bar 1032 and the first abutting surface 102 from the end of the stop bar 1032 away from the stop block 1031. During the rotation process, the first magnetic There is always a magnetic attraction between the suction member 3 and the second magnetic suction member 4. When the second limiting structure 202 rotates to between the stop bar 1032 and the first abutting surface 102, the magnetic attraction between the first magnetic suction member 3 and the second magnetic suction member 4 can prevent the tracheal head 2 from rotating in the opposite direction and leaving the stop bar 1032. At the same time, the stop bar 1032 blocks the second limiting structure 202, and the tracheal head 2 can be firmly fixed in the limiting socket 101. During the blood pressure measurement process, the tracheal head 2 will not fall off from the limiting socket 101, which is convenient for users to measure blood pressure.

[0082] In one embodiment, the stop block 1031 has a first stop surface 10311 and a second stop surface 10312. The first stop surface 10311 is used to prevent the tracheal head 2 from rotating in a first direction. After the tracheal head 2 rotates in a second direction opposite to the first direction, the second limiting structure 202 abuts against the second stop surface 10312. The second stop surface 10312 is used to prevent the tracheal head 2 from continuing to rotate in the second direction.

[0083] In this embodiment, the first stop surface 10311 can prevent the tracheal head 2 from rotating in the first direction. Therefore, after the tracheal plug 201 is inserted into the limiting hole, the tracheal head 2 can only rotate in a second direction opposite to the first direction, which can prevent the user from rotating the tracheal head 2 in the wrong direction. The second stop surface 10312 can prevent the tracheal head 2 from continuing to rotate in the second direction, which can prevent the tracheal head 2 from continuing to rotate after it has been rotated into place.

[0084] In one embodiment, Figure 9 As shown, the first abutting surface 102 is provided with a first limiting groove, the first magnetic component 3 is provided in the first limiting groove and the end of the first magnetic component 3 is flush with the first abutting surface 102; the second limiting structure 202 has a second abutting surface 2021 suitable for abutting against the first abutting surface 102, the second limiting structure 202 is provided with a second limiting groove, the second magnetic component 4 is provided in the second limiting groove and its end is flush with the second abutting surface 2021.

[0085] In this embodiment, when blood pressure needs to be measured, the tracheal plug 201 is first inserted into the limiting socket 101 so that the second abutting surface 2021 abuts against the first abutting surface 102, and then the tracheal head 2 is rotated. The tracheal plug 201 and the second limiting structure 202 rotate as they rotate, so that the second limiting structure 202 is screwed into the gap between the stop bar 1032 and the first abutting surface 102 from the end of the stop bar 1032 away from the stop block 1031. After rotating into place, the magnetic attraction force generated between the first magnetic component 3 and the second magnetic component 4 can prevent the tracheal head 2 from rotating in the opposite direction and leaving the stop bar 1032. At the same time, the stop bar 1032 blocks the second limiting structure 202, so that the tracheal head 2 can be firmly fixed in the limiting socket 101. During the process of measuring blood pressure, the tracheal head 2 will not fall off from the limiting socket 101, which is convenient for users to measure blood pressure. By making the end of the first magnetic member 3 flush with the first abutting surface 102 and the end of the second magnetic member 4 flush with the second abutting surface 2021 , the end surfaces of the first abutting surface 102 and the second limiting structure 202 are flat, and the structure is simple and reliable.

[0086] In an embodiment not shown in the figure, the first magnetic component 3 can be protruded from the first abutting surface 102 and close to the stop block 1031, and the second magnetic component 4 is arranged on the side of the second limiting structure 202. When the tracheal head 2 is rotated into place, the first magnetic component 3 generates a magnetic force on the side of the second limiting structure 202 to prevent the tracheal head 2 from rotating in the opposite direction and leaving the stop bar 1032.

[0087] In one embodiment, at least two second limiting structures 202 are provided, and correspondingly, at least two stopping structures 103 are provided and are rotationally symmetrical.

[0088] In this embodiment, by providing at least two second limiting structures 202 and at least two stop structures 103 that are rotationally symmetrical, the force on the tracheal head 2 can be made more balanced.

[0089] It should be noted that the rotational symmetry of the at least two stop structures 103 refers to rotational symmetry about the central axis of the limiting socket 101 .

[0090] In one embodiment, two second limiting structures 202 are symmetrically provided, and correspondingly, two stopping structures 103 are provided.

[0091] In this embodiment, by symmetrically providing two second limiting structures 202 and providing two stop structures 103 that are rotationally symmetrical with respect to the central axis of the limiting socket 101, the force on the tracheal head 2 can be made more balanced and the structure can be made simpler. Specifically, when it is necessary to measure blood pressure, the tracheal plug 201 is first inserted into the limiting socket 101, so that the two second limiting structures 202 are respectively against the first abutting surface 102, and then the tracheal head 2 is rotated. The tracheal plug 201 and the two second limiting structures 202 rotate accordingly, so that one of the second limiting structures 202 is screwed into the gap between the stop bar 1032 and the first abutting surface 102 from one end of the stop bar 1032 away from the stop block 1031, and the other second limiting structure 202 is screwed into the gap between the stop bar 1032 and the first abutting surface 102 from the other stop block 1031. The strip 1032 is screwed into the gap between the stop strip 1032 and the first abutting surface 102 at one end away from the stop block 1031. After being rotated into place, the magnetic attraction force generated between the first magnetic component 3 and the second magnetic component 4 can prevent the tracheal head 2 from rotating in the opposite direction and leaving the stop strip 1032. At the same time, the stop strip 1032 blocks the second limiting structure 202, and the tracheal head 2 can be firmly fixed in the limiting socket 101. During the blood pressure measurement process, the tracheal head 2 will not fall off from the limiting socket 101, which is convenient for users to measure blood pressure.

[0092] Of course, in an embodiment not shown in the figures, only one second limiting structure 202 may be provided, and only one stopping structure 103 may also be provided.

[0093] In one embodiment, when the tracheal plug 201 is inserted into the limiting plug hole 101 , each second limiting structure 202 abuts against a first stop surface 10311 .

[0094] In an embodiment not shown in the figures, when the tracheal plug 201 is inserted into the limiting plug hole 101 , a gap exists between the second limiting structure 202 and the first stop surface 10311 .

[0095] In one embodiment, the stop strip 1032 has an arc-shaped contact edge 10321 suitable for contacting the outer circumferential surface of the tracheal head 2.

[0096] In this embodiment, since the contact edge 10321 of the stop strip 1032 can maintain contact with the outer peripheral surface of the tracheal head 2, the two stop strips 1032 cooperate to limit the rotation of the tracheal head 2 to prevent the tracheal head 2 from shaking.

[0097] Specific as Figure 7 As shown, the stop bar 1032 is in an arc shape as a whole, and its inner side is a contact edge 10321.

[0098] In one embodiment, the side wall of the mainframe is recessed to form a limiting groove, the first abutting surface 102 constitutes the bottom wall of the limiting groove, and a gap 104 is defined between the stop bar 1032 and the side wall of the limiting groove.

[0099] In this embodiment, by providing a gap 104 between the stop bar 1032 and the side wall of the limiting groove, it is possible to observe through the gap 104 whether the second limiting structure 202 is rotated into place.

[0100] Specifically, the radial dimension of the second limiting structure 202 in the tracheal head 2 is larger than the radial dimension of the stop strip 1032 in the limiting socket 101, and the second limiting structure 202 can be seen through the gap 104. Therefore, whether the second limiting structure 202 is rotated into place can be observed through the gap 104 between the stop strip 1032 and the side wall of the limiting groove.

[0101] Combine Figure 6 and Figure 7 The second limiting structure 202 has a radial dimension L1 on the tracheal head 2, and a radial dimension L2 on the stop bar 1032 on the limiting hole 101, where L1 is greater than L2. It should be noted that the radial dimension of the stop bar 1032 on the limiting hole 101 is the width of the stop bar 1032.

[0102] In one embodiment, the tracheal plug 201 has an insertion end 2011 suitable for inserting into the limiting plug hole 101 , and the outer diameter of the tracheal plug 201 gradually increases from the insertion end 2011 to a direction away from the insertion end 2011 .

[0103] In this embodiment, the outer diameter of the tracheal plug 201 gradually increases from the insertion end 2011 to the direction away from the insertion end 2011, which can guide the installation of the tracheal plug 201 and facilitate the smooth insertion of the tracheal plug 201 into the limiting socket 101.

[0104] In one embodiment, a sealing ring 5 is provided in the limiting insertion hole 101 , and the outer diameter of the insertion end 2011 is larger than the inner diameter of the sealing ring 5 .

[0105] In this embodiment, by making the outer diameter of the insertion end 2011 larger than the inner diameter of the sealing ring 5, when the tracheal plug 201 is installed in place, the sealing ring 5 is squeezed and deformed, thereby ensuring sealing.

[0106] In one embodiment, the tracheal head 2 is provided with a friction portion 203 suitable for gripping.

[0107] In this embodiment, the friction portion 203 is provided to facilitate the user to hold and rotate the tracheal head 2 .

[0108] Specifically, the friction portion 203 may be a plurality of convex strips, a plurality of convex points, or a plurality of grooves.

[0109] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A measuring instrument, characterized in that: include: The host has a first limiting structure (1), wherein the first limiting structure (1) includes a limiting socket (101); A tracheal head (2) comprising a tracheal plug (201) adapted to be inserted into the limiting plug hole (101) and sealed therewith; A first magnetic attraction member (3) is provided on one of the first limiting structure (1) and the tracheal head (2); A second magnetic member (4) is provided on the other of the first limiting structure (1) and the tracheal head (2); after the tracheal plug (201) is inserted into the limiting jack (101), a magnetic attraction force is generated between the first magnetic member (3) and the second magnetic member (4); the first magnetic member (3) is provided on the first limiting structure (1), the second magnetic member (4) is provided on the tracheal head (2); the first limiting structure (1) further includes a first abutting surface (102), the limiting jack (101) and the first magnetic member (3) are provided on the first abutting surface (102), and the tracheal head (2) further includes a second limiting structure located outside the tracheal plug (201). (202), when the tracheal plug (201) is inserted into the limiting plug hole (101), the second limiting structure (202) abuts against the first abutting surface (102), the second magnetic attraction member (4) is provided on the second limiting structure (202), the first limiting structure (1) further comprises a stop structure (103), the stop structure (103) comprises a stop block (1031) and a stop strip (1032) extending from the stop block (1031), the stop strip (1032) and the first abutting surface (102) have a gap, the first magnetic attraction member (3) is at least located at a position where the first abutting surface (102) and the stop strip (1032) are opposite; The second limiting structure (202) is suitable for being screwed into between the stop strip (1032) and the first abutting surface (102) from the gap between one end of the stop strip (1032) away from the stop block (1031) and the first abutting surface (102).

2. The measuring instrument according to claim 1, characterized in that The first magnetic attraction member (3) is a magnet, and the second magnetic attraction member (4) is made of ferromagnetic material.

3. The measuring instrument according to claim 1, characterized in that The first magnetic attraction member (3) extends on the first abutting surface (102) from a position extending from the stop bar (1032) to a position close to the stop block (1031) and opposite to the stop bar (1032).

4. The measuring instrument according to claim 1, characterized in that The stop block (1031) has a first stop surface (10311) and a second stop surface (10312), wherein the first stop surface (10311) is used to prevent the tracheal head (2) from rotating in a first direction, and after the tracheal head (2) rotates in a second direction opposite to the first direction, the second limiting structure (202) abuts against the second stop surface (10312), and the second stop surface (10312) is used to prevent the tracheal head (2) from continuing to rotate in the second direction.

5. The measuring instrument according to claim 1, characterized in that The first abutting surface (102) is provided with a first limiting groove, the first magnetic attraction member (3) is arranged in the first limiting groove, and the end of the first magnetic attraction member (3) is flush with the first abutting surface (102); The second limiting structure (202) has a second abutting surface (2021) suitable for abutting against the first abutting surface (102), and the second limiting structure (202) is provided with a second limiting groove, and the second magnetic attraction member (4) is arranged in the second limiting groove and its end is flush with the second abutting surface (2021).

6. The measuring instrument according to any one of claims 1 to 5, characterized in that At least two of the second limiting structures (202) are provided, and correspondingly, at least two of the stopping structures (103) are provided and are rotationally symmetrical.

7. The measuring instrument according to claim 6, characterized in that The second limiting structures (202) are symmetrically provided with two, and correspondingly, the stopping structures (103) are provided with two.

8. The measuring instrument according to claim 1, wherein The stop strip (1032) has an arc-shaped contact edge (10321) suitable for contacting the outer peripheral surface of the tracheal head (2).

9. The measuring instrument according to any one of claims 1 to 5, 7 to 8, characterized in that The side wall of the main unit is recessed to form a limiting groove, the first abutting surface (102) constitutes the bottom wall of the limiting groove, a gap (104) is provided between the stop strip (1032) and the side wall of the limiting groove, and the radial dimension of the second limiting structure (202) in the tracheal head (2) is greater than the radial dimension of the stop strip (1032) in the limiting socket (101).

10. The measuring instrument according to any one of claims 1 to 5, 7 to 8, characterized in that The tracheal plug (201) has an insertion end (2011) suitable for being inserted into the limiting plug hole (101), and the outer diameter of the tracheal plug (201) gradually increases from the insertion end (2011) in a direction away from the insertion end (2011).

11. The measuring instrument according to claim 10, characterized in that A sealing ring (5) is provided in the limiting insertion hole (101), and the outer diameter of the insertion end (2011) is larger than the inner diameter of the sealing ring (5).

12. The measuring instrument according to any one of claims 1 to 5 and 7 to 8, characterized in that The tracheal head (2) is provided with a friction portion (203) suitable for gripping.

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