Tightening mechanism and sphygmomanometer

Abstract

The utility model relates to a tightening mechanism and a sphygmomanometer, the tightening mechanism comprises a traction seat, a variable-diameter ring, a moving device and a guide limiting piece, and the variable-diameter ring is connected to the traction seat; the variable-diameter ring comprises a first part and a second part, and the joint of the first part and the second part is connected to the traction seat; the first part has a first end, and the second part has a second end; the second end is positioned on the inner side of the first end; the moving device is connected with the first end and used for driving the variable-diameter ring to contract or loosen; the guide limiting piece is arranged on the second part; the guide limiting piece is provided with a guide groove; the first part is movably limited in the guide groove. And by arranging the guide limiting piece, the limiting and guiding effects can be achieved in the relative movement process of the first part and the second part, shaking in the movement process is avoided, and the stability of the variable-diameter ring in the shrinkage or loosening process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of blood pressure measuring devices, in particular to a tightening mechanism and a sphygmomanometer. BACKGROUND

[0002] With the progress of science and technology, great convenience has been brought to medical treatment. Traditional mercury column type manual blood pressure measuring instruments have been gradually replaced by electronic blood pressure measuring devices. Electronic blood pressure measuring devices have the advantages of simple operation and clear display, and have been widely applied to medical treatment.

[0003] In order to quickly measure blood pressure, a tunnel type sphygmomanometer is often used instead of a traditional cuff type sphygmomanometer. The tester's arm is inserted into the tunnel of the tightening mechanism, the tightening mechanism automatically shrinks and tightens the arm, and after the blood pressure measurement is completed, the tightening mechanism automatically loosens.

[0004] In related technologies, the tightening mechanism is prone to shaking during the shrinking and loosening process, and the stability is not high. CONTENT OF THE INVENTION

[0005] The present application provides a tightening mechanism and a sphygmomanometer to solve the technical problem that the tightening mechanism is prone to shaking during the shrinking and loosening process, and the stability is not high.

[0006] In a first aspect, the present application provides a tightening mechanism, comprising:

[0007] a pulling seat;

[0008] a variable diameter ring connected to the pulling seat; the variable diameter ring comprises a first part and a second part, the connection between the first part and the second part is connected to the pulling seat; the first part has a first end, and the second part has a second end; the second end is located inside the first end;

[0009] a moving device connected to the first end, used to drive the variable diameter ring to shrink or loosen;

[0010] a guide limiting piece provided on the second part; the guide limiting piece has a guide groove; the first part is movably limited in the guide groove.

[0011] Further, the guide limiting piece is provided on the second end; the guide groove is located outside the second end.

[0012] Further, the guide limiting piece comprises:

[0013] a fixed part fixedly connected to the second end;

[0014] a connecting part connected to the fixed part and extending towards the outside of the second end;

[0015] A limiting part is connected to one end of the connecting part away from the fixed part and is arranged at an angle with the connecting part; the limiting part is arranged at intervals with the fixed part to form the guide groove.

[0016] Further, the fixed part is connected to the inner side of the second end by a first fastener.

[0017] Further, the tightening mechanism further comprises an air bag, which is located on the inner side of the variable diameter ring and is arranged corresponding to the second part;

[0018] The first fastener is in sliding abutment with the outer side of the air bag.

[0019] Further, a guide piece is further included, which is attached to the inner side of the first part of the variable diameter ring; one end of the guide piece is connected to the first end and is located between the second end and the first end; the other end of the guide piece is fixedly connected to the pulling seat by a second fastener which is threaded through the guide piece and the second part of the variable diameter ring;

[0020] The air bag is located on the inner side of the guide piece away from the second end; and the second fastener is in sliding abutment with the outer side of the air bag;

[0021] When the variable diameter ring is contracted or loosened, the second end moves along the inner side of the guide piece.

[0022] Further, the guide piece is connected to the first end by a third fastener; the third fastener is in sliding abutment with the outer side of the first part.

[0023] Further, the moving device comprises:

[0024] A toothed belt is movably arranged in the pulling seat, and one end of the toothed belt is connected to the first end and the other end extends out of the pulling seat;

[0025] A driving device is arranged in the pulling seat; the driving device is provided with a toothed shaft which is in meshing connection with the toothed belt; when the driving device drives the toothed shaft to rotate, it drives the toothed belt to move, so as to contract or loosen the variable diameter ring.

[0026] Further, the part of the other end of the toothed belt which extends out of the pulling seat is provided with a baffle.

[0027] In a second aspect, the application provides a sphygmomanometer, comprising:

[0028] A sphygmomanometer body;

[0029] The tightening mechanism as described above, which is connected to the sphygmomanometer body.

[0030] The above technical solutions provided by the present application have the following advantages compared with the prior art:

[0031] In the technical solutions of the present application, the pulling seat provides a mounting base for the variable-diameter ring, the moving device is connected to the first end, the first end is moved by the moving device to cause the first part and the second part to move relatively, the second end moves inside the second part, and the variable-diameter ring is contracted or loosened; at the same time, by providing the guide limiting piece, the relative movement of the first part and the second part is limited and guided, the shaking during movement is avoided, and the stability during contraction or loosening of the variable-diameter ring is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the specification.

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, other drawings can also be obtained by those skilled in the art without creative labor under the premise of not paying the creative labor.

[0034] One or more embodiments are exemplarily illustrated by the pictures in the drawings corresponding thereto, and these exemplary illustrations do not constitute a limitation on the embodiments, elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified, the drawings do not constitute a proportional limitation.

[0035] Figure 1 A sectional view of a tightening mechanism (before contraction) provided by an embodiment of the present application;

[0036] Figure 2 A sectional view of a tightening mechanism provided by an embodiment of the present application; Figure 1 An enlarged schematic view of position B in FIG. 1;

[0037] Figure 3 A sectional view of a tightening mechanism provided by an embodiment of the present application; Figure 1 An enlarged schematic view of position C in FIG. 1;

[0038] Figure 4 A top view of a tightening mechanism provided by an embodiment of the present application;

[0039] Figure 5 A sectional view of a tightening mechanism provided by an embodiment of the present application; Figure 4 A partial sectional view of the assembly position of the guide limiting piece

[0040] Figure 6 A structural schematic view of a tightening mechanism provided by an embodiment of the present application (after contraction).

[0041] Explanation of reference signs:

[0042] Pulling seat 1, variable diameter ring 2, first part 21, first end 211, second part 22, second end 221, fourth fastener 23, moving device 3, toothed belt 31, toothed shaft 32, blocking piece 33, fifth fastener 34, guide limiting piece 4, guide groove 4a, fixed part 41, connecting part 42, limiting part 43, first fastener 44, air bag 5, guide piece 6, second fastener 61, third fastener 62, auscultation head 7, air nozzle 8. DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0044] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplicity, the elements and settings of particular examples in the following description are shown in great detail. Of course, they are merely examples and are presented to illustrate the application and not to limit the application. In addition, reference numerals can be repeated in the different examples in the present application. Such repetition is for the purpose of simplicity and clarity and does not indicate a relationship between the described various embodiments and / or settings.

[0045] For the convenience of description, spatial relative terms can be used in the description to describe the relative position relationship or movement condition of one element or feature with respect to another element or feature as shown in the drawings, such as "inner", "outer", "inboard", "outboard", "under", "below", "on", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the drawings is flipped over or the posture is changed or the movement state is changed, the directional indications will also change accordingly, for example: the element described as "under" or "below" another element or feature will be oriented as "above" or "over" another element or feature. Therefore, the example term "below" can include both upward and downward orientations. The device can be additionally oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the description are interpreted accordingly.

[0046] In a first aspect, Figures 1 to 6The tightening mechanism provided by the embodiment of the application can be applied to a sphygmomanometer for measuring blood pressure. Figure 1 A schematic view of the tightening mechanism before contraction, Figure 6 A schematic view of the tightening mechanism after contraction.

[0047] The tightening mechanism comprises a pulling seat 1, a variable-diameter ring 2, a moving device 3 and a guide limiting piece 4. The variable-diameter ring 2 is connected to the pulling seat 1. The variable-diameter ring 2 comprises a first part 21 and a second part 22. The connection between the first part 21 and the second part 22 is connected to the pulling seat 1. The first part 21 has a first end 211, and the second part 22 has a second end 221. The second end 221 is located on the inner side of the first end 211. The moving device 3 is connected to the first end 211 for driving the variable-diameter ring 2 to contract or loosen. The guide limiting piece 4 is arranged on the second part 22. The guide limiting piece 4 has a guide groove 4a. The first part 21 is movably limited in the guide groove 4a.

[0048] The pulling seat 1 provides a mounting basis for the variable-diameter ring 2. The moving device 3 is connected to the first end 211. The first end 211 is moved by the moving device 3 to cause the first part 21 and the second part 22 to move relatively. The second end 221 moves on the inner side of the second part 22, thereby realizing contraction or loosening of the variable-diameter ring 2. At the same time, the guide limiting piece 4 is arranged to limit and guide the relative movement of the first part 21 and the second part 22, so as to avoid shaking during movement and improve the stability during contraction or loosening of the variable-diameter ring 2.

[0049] It should be noted that, with reference to Figure 4 In the embodiment, the first end 211 is a region of the first part 21 of the variable-diameter ring 2 close to the end of the first part 21 away from the second part 22. The second end 221 is a region of the second part 22 of the variable-diameter ring 2 close to the end of the second part 22 away from the first part 21.

[0050] As shown in Figure 1 and Figure 4 In the technical solution of the embodiment, the guide limiting piece 4 is arranged on the second end 221. It can be understood that the guide limiting piece 4 arranged on the second end 221 can guide and limit the contraction and loosening of the variable-diameter ring 2.

[0051] When the second part 22 moves relatively to the first part 21, the first part 21 is always located on the outer side of the second part 22 in the overlapping region of the first part 21 and the second part 22. In order to facilitate the cooperation between the first part 21 and the guide groove 4a, the guide groove 4a is arranged on the outer side of the second end 221.

[0052] As shown in Figure 5As shown, in the technical solution of this embodiment, the guide limiting member 4 includes a fixing part 41, a connecting part 42 and a limiting part 43. The fixing part 41 is fixedly connected to the second end 221; the connecting part 42 is connected to the fixing part 41 and extends outward toward the second end 221; the limiting part 43 is connected to the end of the connecting part 42 away from the fixing part 41 and is set at an angle with the connecting part 42; the limiting part 43 and the fixing part 41 are spaced apart to form a guide groove 4a.

[0053] It is understood that the fixing part 41 is connected to the second end 221 to fix the guide limiting member 4 to the second end 221. The connecting part 42 connects the limiting part 43 and the fixing part 41, and a gap is formed between the limiting part 43 and the fixing part 41, and the first part 21 is movably inserted into the gap.

[0054] Optionally, the side of the limiting part 43 facing the fixing part 41 is arc-shaped, so as to reduce the damage of the limiting part 43 to the outer surface of the first part 21.

[0055] like Figure 5 As shown, in this embodiment, the fixing part 41 is connected to the inner side of the second end 221 by the first fastener 44. This avoids the fixing part 41 from generating resistance to the relative movement of the first part 21 and the second part 22. In this embodiment, connecting the fixing part 41 to the inner side of the second end 221 ensures the smooth contraction and loosening process of the variable diameter ring 2.

[0056] It should be noted that, in order to ensure the smooth movement of the first part 21 and the second part 22, in this embodiment, the gap between the fixing part 41 and the limiting part 43 is greater than the thickness of the first part 21 and the second part 22 after being superimposed.

[0057] like Figure 1 As shown, in the technical solution of this embodiment, the tightening mechanism further includes an airbag 5, which is located inside the variable diameter ring 2 and is configured corresponding to the second part 22; see reference. Figure 1 It also includes an air nozzle 8 located on the airbag 5, through which the airbag 5 can be inflated and deflated.

[0058] In this embodiment, the first fastener 44 slides against the outer side of the airbag 5, so that the airbag 5 covers the inner side of the fixing part 41 and the first fastener 44. When the variable diameter ring 2 is tightened, the edge of the airbag 5 will not be blocked by the fixing part 41 and the first fastener 44. The first fastener 44 can be a rivet.

[0059] like Figure 1 and Figure 3As shown, in this embodiment, the technical solution also includes a guide plate 6, which is attached to the inner side of the first part 21 of the variable diameter ring 2. One end of the guide plate 6 is connected to the first end 211 and is located between the second end 221 and the first end 211. The other end of the guide plate 6 is fixedly connected to the traction seat 1 by a second fastener passing through the guide plate 6 and the variable diameter ring 2. When the variable diameter ring 2 contracts or expands, the second end 221 moves along the inner side of the guide plate 6. The end of the airbag 5 away from the second end 221 is located inside the guide plate 6. Thus, by setting the guide plate 6, the relative movement of the first part 21 and the second part 22 can be guided, ensuring that the contraction and expansion of the variable diameter ring 2 can proceed smoothly.

[0060] In this embodiment, reference Figure 3 The guide plate 6 is fixedly connected to the variable diameter ring 2 and the traction seat 1 by the first fastener 44, and the second fastener 61 slides against the outer side of the airbag 5. When the variable diameter ring 2 is tightened, the edge of the airbag 5 will not be blocked by the second fastener 61. The second fastener 61 can be a rivet.

[0061] like Figure 1 and Figure 2 As shown, in the technical solution of this embodiment, the guide piece 6 is connected to the first end 211 by the third fastener 62; the third fastener 62 slides against the outer side of the first part 21.

[0062] It is understandable that the guide plate 6 and the first end 211 of the variable diameter ring 2 are fixedly connected by the third fastener 62, and when the variable diameter ring 2 is tightened, the second part 22 will not be blocked by the third fastener 62, and the second part 22 can slide and abut against the inner side of the guide plate 6.

[0063] The third fastener 62 can be a rivet.

[0064] refer to Figure 3 To improve the connection stability between the variable diameter ring 2 and the tensioning seat 1, the variable diameter ring 2 is also connected to the tensioning seat 1 via a fourth fastener 23. The fourth fastener 23 slides against the outer side of the guide plate 6, preventing the guide plate 6 from being blocked by the fourth fastener 23. The fourth fastener 23 can be a rivet.

[0065] like Figures 1 to 4 As shown, in the technical solution of this embodiment, the moving device 3 includes a toothed belt 31 and a driving device. The toothed belt 31 is movably disposed on the traction seat 1, and one end of the toothed belt 31 is connected to the first end 211, and the other end extends out of the traction seat 1. The driving device is disposed on the traction seat 1. The driving device is provided with a toothed shaft 32, which is meshed with the toothed belt 31. When the driving device drives the toothed shaft 32 to rotate, it drives the toothed belt 31 to move, so that the variable diameter ring 2 contracts or loosens.

[0066] It can be understood that the driving device further comprises a driving member, the driving member drives the rotation of the gear shaft 32, and the gear shaft 32 drives the movement of the gear belt 31 when rotating, and the gear belt 31 drives the contraction or loosening of the variable diameter ring 2. The meshing of the gear shaft 32 and the gear belt 31 realizes the movement of the gear shaft 32 driven by the gear shaft 32, which is simple in structure, low in cost, small in installation difficulty, and high in structural stability.

[0067] In the embodiment, the gear belt 31 is fixedly connected to the first end 211 of the variable diameter ring 2 through the fifth fastener 34. Figure 2

[0068] The driving member can be an electric motor, and the fifth fastener 34 can be a rivet.

[0069] As shown in Figure 1 , in the technical scheme of the embodiment of the application, the part of the other end of the gear belt 31 extending out of the pulling seat 1 is provided with a baffle 33. In this way, when the variable diameter ring 2 is loosened, the gear belt 31 can be prevented from completely coming out of the pulling seat 1, the limit position of the loosening of the tightening mechanism is limited, the safety is improved, and the service life of the tightening mechanism is also improved.

[0070] Exemplarily, the pulling seat 1 is provided with a perforation, the other end of the gear belt 31 passes through the perforation, and the size of the perforation is smaller than the size of the baffle 33. In this way, the baffle 33 can be stopped.

[0071] In a second aspect, the application further provides a sphygmomanometer, which comprises a sphygmomanometer body and a tightening mechanism as in the above embodiments. The specific structure of the tightening mechanism is referred to the above embodiments. Since the sphygmomanometer adopts all the technical schemes of the above embodiments, it at least has all the beneficial effects brought by the technical schemes of the above embodiments, which will not be described here. The tightening mechanism is connected to the sphygmomanometer body.

[0072] As shown in Figure 1 and Figure 6 , the sphygmomanometer further comprises a stethoscope head arranged on the tightening mechanism. When the sphygmomanometer is used to measure blood pressure, the arm is first inserted into the inside space of the variable diameter ring 2, then the motor is started to drive the gear shaft 32 to rotate in the positive direction, and the gear belt 31 is moved to make the variable diameter ring 2 contract. After the contraction to the preset position, the air bag 5 is inflated and deflated through the air nozzle 8, and the blood pressure is measured in combination with the stethoscope head. After the blood pressure measurement is completed, the motor is started to drive the gear shaft 32 to rotate in the reverse direction, and the gear belt 31 is moved to make the variable diameter ring 2 loosen.

[0073] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0074] ​In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0075] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0076] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be connected, or detachable, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0077] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include the direct contact between the first and second features, or the contact between the first and second features through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes the first feature directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes the first feature directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0078] In the description of the application, reference to "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the above expressions in various places in the description are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Moreover, the terms "first", "second", "third", etc. are used herein merely as identifiers for the various embodiments or examples, and are not intended to identify a particular order or sequence.

[0079] Obviously, various modifications and changes can be made to the present application without departing from the spirit and scope of the application. It is understood that such modifications and changes are intended to fall within the scope of the application, which is to be interpreted in the broadest sense possible. Accordingly, the proper scope of the application encompasses all such modifications and changes as can be made to the application without departing from the essential spirit of the application.

[0080] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tightening mechanism, characterized in that, include: Pulling seat (1); A variable diameter ring (2) is connected to the traction seat (1); the variable diameter ring (2) includes a first part (21) and a second part (22), the connection between the first part (21) and the second part (22) is connected to the traction seat (1); the first part (21) has a first end (211), and the second part (22) has a second end (221); the second end (221) is located inside the first end (211); The moving device (3) is connected to the first end (211) and is used to drive the variable diameter ring (2) to contract or loosen. A guide limiting member (4) is provided in the second part (22); the guide limiting member (4) has a guide groove (4a); the first part (21) is movably limited within the guide groove (4a).

2. The tightening mechanism according to claim 1, characterized in that, The guide limiting member (4) is located at the second end (221); the guide groove (4a) is located on the outside of the second end (221).

3. The tightening mechanism according to claim 2, characterized in that, The guide limiting member (4) includes: The fixing part (41) is fixedly connected to the second end (221); The connecting part (42) is connected to the fixing part (41) and extends outward toward the second end (221); A limiting part (43) is connected to the end of the connecting part (42) away from the fixing part (41) and is set at an angle to the connecting part (42); the limiting part (43) and the fixing part (41) are spaced apart to form the guide groove (4a).

4. The tightening mechanism according to claim 3, characterized in that, The fixing part (41) is connected to the inside of the second end (221) by a first fastener (44).

5. The tightening mechanism according to claim 4, characterized in that, The tightening mechanism also includes an airbag (5), which is located inside the variable diameter ring (2) and is configured corresponding to the second part (22); The first fastener (44) slides against the outer side of the airbag (5).

6. The tightening mechanism according to claim 5, characterized in that, It also includes a guide plate (6), which is attached to the inner side of the first part (21) of the variable diameter ring (2); one end of the guide plate (6) is connected to the first end (211) and is located between the second end (221) and the first end (211); the other end of the guide plate (6) is fixedly connected to the traction seat (1) by a second fastener (61) passing through the guide plate (6) and the variable diameter ring (2); The end of the airbag (5) away from the second end (221) is located inside the guide plate (6); and the second fastener (61) slides against the outer side of the airbag (5); When the variable diameter ring (2) contracts or expands, the second end (221) moves along the inner side of the guide plate (6).

7. The tightening mechanism according to claim 6, characterized in that, The guide piece (6) is connected to the first end (211) by a third fastener (62); the third fastener (62) slides against the outer side of the first part (21).

8. The tightening mechanism according to any one of claims 1 to 7, characterized in that, The mobile device (3) includes: A toothed belt (31) is movably disposed on the traction seat (1), and one end of the toothed belt (31) is connected to the first end (211), and the other end extends out of the traction seat (1); A drive device is provided on the traction seat (1); the drive device is provided with a gear shaft (32), the gear shaft (32) is meshed with the toothed belt (31), and when the drive device drives the gear shaft (32) to rotate, it drives the toothed belt (31) to move, so that the variable diameter ring (2) contracts or loosens.

9. The tightening mechanism according to claim 8, characterized in that, The other end of the toothed belt (31) extending beyond the traction seat (1) is provided with a baffle (33).

10. A blood pressure monitor, characterized in that, include: The blood pressure monitor itself; The tightening mechanism as described in any one of claims 1 to 9 is connected to the blood pressure monitor body.

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