A transmission mechanism of an upper-arm electronic sphygmomanometer and an electronic sphygmomanometer

Abstract

The present invention provides a transmission mechanism for an arm-type electronic sphygmomanometer and an electronic sphygmomanometer, relating to the technical field of medical devices. In the transmission mechanism of the arm-type electronic sphygmomanometer, the transmission mechanism includes a base body, a limit seat, an elastic member, a driving member and a moving gear. The limit seat is used for movably mounting a toothed belt. The elastic member is installed between the base body and the limit seat. The driving end of the driving member is drivingly connected to the moving gear, and the moving gear is used for meshing with the toothed belt. For the transmission mechanism for an arm-type electronic sphygmomanometer and the electronic sphygmomanometer provided by the present invention, the limit seat mounts the toothed belt, and the elastic member is installed between the base body and the limit seat. By virtue of the elastic force of the elastic member, the toothed belt mounted on the limit seat can be kept meshed with the moving gear, so that under the action of the driving member, the toothed belt is driven to move, realizing the tightening and unfolding of the cuff. Compared with the traditional manual operation method, the automation level is high, which helps to improve the measurement efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a transmission mechanism of an arm-type electronic sphygmomanometer and an electronic sphygmomanometer. Background Art

[0002] With the increasing attention of people to their own health, household medical measuring instruments are increasingly accepted and loved by people. Currently, common household sphygmomanometers mostly adopt upper-arm electronic sphygmomanometers, which mainly include an armband and a measuring main unit. During measurement, the armband is connected to the measuring main unit through an air tube to detect blood pressure.

[0003] For currently common upper-arm electronic sphygmomanometers, the armband is mostly fixed on a person's arm by an artificial winding method, and the automation level during the winding process is low, which affects the detection efficiency. Summary of the Invention

[0004] The present invention provides a transmission mechanism of an arm-type electronic sphygmomanometer and an electronic sphygmomanometer, so as to solve the defect in the prior art that the electronic sphygmomanometer needs to be manually wound, and realize automatic winding.

[0005] The present invention provides a transmission mechanism of an arm-type electronic sphygmomanometer. The transmission mechanism includes a seat body, a limit seat, an elastic member, a driving member, and a moving gear. The limit seat is used for movably installing a toothed belt. The elastic member is installed between the seat body and the limit seat. The driving end of the driving member is drivingly connected to the moving gear, and the moving gear is used for meshing with the toothed belt.

[0006] According to the transmission mechanism of an arm-type electronic sphygmomanometer provided by the present invention, the elastic member is an inflatable airbag.

[0007] According to the transmission mechanism of an arm-type electronic sphygmomanometer provided by the present invention, the transmission mechanism further includes a compression spring. One end of the compression spring abuts against the top of the limit seat, and the other end abuts against the inner wall of the top of the seat body.

[0008] According to the transmission mechanism of an arm-type electronic sphygmomanometer provided by the present invention, there are four compression springs, and the four compression springs are arranged in a square array along the top surface of the limit seat.

[0009] According to the transmission mechanism of an arm-type electronic sphygmomanometer provided by the present invention, the seat body includes a bottom plate and a limit frame. The elastic member is fixedly installed at the bottom of the bottom plate and the limit seat. A compression spring installation position is provided on the top surface of the limit seat. The limit frame includes a cross plate parallel to the bottom plate, and the compression spring is received between the compression spring installation position and the cross plate.

[0010] According to the transmission mechanism of an arm-type electronic sphygmomanometer provided by the present invention, the limit seat includes a first limit seat and a second limit seat with the same structure, and the first limit seat and the second limit seat are fixedly connected.

[0011] A drive mechanism of an arm-type electronic sphygmomanometer according to the present invention, the top surface of the limit seat is arc-shaped, and card holes for the toothed belt to pass through are respectively provided at both ends of the arc-shaped top surface.

[0012] A drive mechanism of an arm-type electronic sphygmomanometer according to the present invention, two guide shafts are rotatably installed in the limit seat, through holes are provided on the top surface of the limit seat, and the guide shafts protrude from the through holes to the top surface of the limit seat so as to contact the toothed belt.

[0013] A drive mechanism of an arm-type electronic sphygmomanometer according to the present invention, the guide shaft is a rotating shaft with thin ends and thick middle, and both ends of the guide shaft are connected to the limit seat through bearings.

[0014] The present invention also provides an electronic sphygmomanometer, including the drive mechanism of the arm-type electronic sphygmomanometer as described above.

[0015] For the drive mechanism of the arm-type electronic sphygmomanometer and the electronic sphygmomanometer provided by the present invention, a toothed belt is installed on the limit seat, and an elastic member is installed between the seat body and the limit seat. With the elastic force of the elastic member, the toothed belt installed on the limit seat can be kept meshed with the moving gear, so that under the action of the driving member, the toothed belt is driven to move, realizing the tightening and unfolding of the cuff. Compared with the traditional manual operation method, the automation level is high, which helps to improve the measurement efficiency. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is an exploded view of the blood pressure cuff assembly provided by the present invention;

[0018] Figure 2 is a cross-sectional view of the electronic sphygmomanometer provided by the present invention;

[0019] Figure 3 is a schematic diagram of the cooperation structure between the drive mechanism and the toothed belt provided by the present invention;

[0020] Figure 4 is a cross-sectional view of the cooperation structure between the drive mechanism and the toothed belt provided by the present invention

[0021] Figure 5 is an exploded view of the limit seat provided by the present invention;

[0022] Reference Signs:

[0023] 10: Bracket; 11: Concave surface; 12: Flange

[0024] 13: Belt passing hole; 20: Toothed belt; 30: Winding plate

[0025] 40: Cuff; 50: Tensioning plate; 51: Thread passing hole

[0026] 60: Protective sleeve; 70: Transmission mechanism; 71: Base

[0027] 700: Seat body; 701: Bottom plate; 702: Limit frame

[0028] 710: Limit seat; 711: Card hole; 712: First limit seat

[0029] 713: Second limit seat; 72: Elastic member; 73: Driving member

[0030] 731: Main shaft; 732: Flat key; 74: Driving gear

[0031] 75: Bearing; 76: Guide shaft; 77: Compression spring

[0032] 80: Guide assembly Detailed implementation mode

[0033] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without any creative effort shall fall within the scope of protection of the present invention.

[0034] The terms "first" and "second" in the description and claims of this application may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The following Figures 1 - 5 describes the structure of the electronic sphygmomanometer provided by the present invention.

[0038] As Figure 1 and Figure 2 shown, the embodiment of the present invention provides a sphygmomanometer armband assembly, including a bracket 10, a toothed belt 20, a winding plate 30, and a cuff 40. The winding plate 30 is fixedly or detachably installed on the bracket 10. The cuff 40 is sleeved on the winding plate 30 and can be removed from the winding plate 30. The toothed belt 20 is wound around the outer surface of the winding plate 30. A part of the toothed belt 20 is fixed to the winding plate 30. The movable ends of the toothed belt 20 and the winding plate 30 are both movably inserted through the slideway formed after the winding plate 30 and the bracket 10 are connected. It can be understood that the width of the movable end of the winding plate 30 is smaller than the width of the fixed part of the winding plate 30.

[0039] In the sphygmomanometer armband assembly provided by the embodiment of the present invention, the winding plate 30 is fixedly installed on the bracket 10. The movable end of the winding plate 30 is inserted through the slideway formed by the fixation of the winding plate 30 and the bracket 10, thereby forming a cavity for the human arm to pass through by winding around the winding plate 30. When the toothed belt 20 is pulled, the winding plate 30 fixedly connected to the toothed belt 20 is driven to contract or expand, thereby binding the cuff 40 to the human arm or releasing it from the human arm.

[0040] Among them, as Figure 1As shown, the bracket 10 is provided with an arc-shaped concave surface 11, which is adapted to the measurement position of the human arm when measuring blood pressure, meeting ergonomics and improving the comfort of the user during blood pressure detection. The winding plate 30 is fixedly installed at the concave surface 11 of the bracket 10 through screws, forming a slideway between the winding plate 30 and the concave surface 11, and the movable end of the winding plate 30 passes through the slideway. In order to prevent the winding plate 30 from shifting in the width direction of the concave surface during the pulling process, retaining edges 12 are respectively provided on the opposite sides of the concave surface 11. One side of the toothed belt 20 is provided with a rack, and the rack can be provided only in a section starting from the movable end of the toothed belt 20. It can be understood that the toothed side of the toothed belt 20 faces the winding plate 30. One end of the toothed belt 20 is fixedly installed at the end of the winding plate 30 through a rivet. The cloth sleeve of the cuff 40 is sleeved on the winding plate 30.

[0041] Refer to Figure 1 and Figure 2 , the blood pressure monitor armband assembly further includes a tensioning plate 50, the tensioning plate 50 is fixedly installed on the bracket 10, a part of the cuff 40 is fixed to the winding plate 30, another part of the cuff 40 is adhesively fixed to the tensioning plate 50, and one end of the tensioning plate 50 abuts against the winding plate 30. As Figure 1 shown, the tensioning plate 50 has a preset arc. One end of the tensioning plate 50 partially overlaps with the winding plate 30, and the overlapping part is fixedly installed on the bracket 10 by screws. The movable end of the tensioning plate 50 and the movable end of the winding plate 30 are located on opposite sides of the screw. When pulling the toothed belt 20 to drive the winding plate 30 to contract, the tensioning plate 50 exerts a force on the winding plate 30 to prevent the winding plate 30 from shifting to one side, avoiding the winding plate 30 driving the human arm to move accordingly during the contraction process and reducing the user experience.

[0042] Specifically, the fixed ends of the winding plate 30, the toothed belt 20 and the tensioning plate 50 are connected together and fixedly installed at the concave surface 11 of the bracket 10 through screws.

[0043] The tensioning plate 50 provided by the embodiment of the present invention can protect the cuff 40, and can quickly release the pressure of the cuff 40 on the human arm when a failure occurs during the blood pressure measurement process or after the blood pressure measurement is completed. A wire passing hole 51 is further provided on the tensioning plate 50, and the trachea on the cuff 40 passes through the wire passing hole 51 and is connected to the measurement host.

[0044] Furthermore, the thickness ratio of the tensioning plate 50 to the winding plate 30 is 2:3. For example, if the thickness of the winding plate 30 is 1.5 mm, then the thickness of the tensioning plate 50 is 1 mm. The thickness of the tensioning plate 50 is less than that of the winding plate 30 to prevent the force of the tensioning plate 50 from being too large when the winding plate 30 contracts and causing the winding plate 30 to tilt to the other side.

[0045] In addition, the blood pressure monitor armband assembly further includes a protective sleeve 60, and the protective sleeve 60 is installed on the cuff 40.

[0046] An embodiment of the present invention further provides an electronic sphygmomanometer, as Figure 2 shown. The electronic sphygmomanometer includes a transmission mechanism 70 and the sphygmomanometer armband assembly as described above. The transmission mechanism 70 is used to drive the toothed belt 20 to move so as to wind or unfold the cuff 40.

[0047] Specifically, as Figures 3 to 5 shown, the transmission mechanism 70 includes a base 71, an elastic member 72, a driving member 73 and a moving gear 74. The toothed belt 20 is movably inserted into the base 71. The elastic member 72 is installed in the base 71 and one end of the elastic member 72 abuts against the toothed belt 20. The driving end of the driving member 73 is drivingly connected to the moving gear 74. Under the action of the driving member 73 such as a driving motor, the moving gear 74 rotates, thereby driving the toothed belt 20 engaged therewith to move together, thereby pulling the winding plate 30 to wind or unfold. The driving motor can rotate forward and backward. The transmission shaft of the driving motor is fixedly connected to the main shaft 731. A flat key 732 is provided on the main shaft 731. The moving gear 74 is sleeved and fixed to the main shaft 731 through the flat key 732. Under the action of the elastic member 72, the toothed belt 20 is more tightly engaged with the moving gear 74, improving the transmission effect. Preferably, the length of the moving gear 74 is equal to the width of the toothed belt 20 to maintain the stable movement of the toothed belt 20.

[0048] In some embodiments of the present invention, the elastic member 72 is a spring, and an arc surface is installed at the end of the spring. With the elastic force of the spring, the arc surface abuts against the toothed belt 20 to engage with the moving gear 74 and maintain the engaged state. In some other embodiments of the present invention, the elastic member 72 is an inflatable airbag, and the inflatable airbag is installed at the bottom of the base 71. After the inflatable airbag is inflated and expanded, it drives the toothed belt 20 to engage with the moving gear 74. When the inflatable airbag releases gas, the toothed belt 20 naturally relaxes and disengages from the moving gear 74.

[0049] As Figure 2 shown, the electronic sphygmomanometer further includes a guiding assembly 80. The guiding assembly 80 includes a mounting seat and a guiding wheel. The mounting seat is fixedly installed at the bottom of the bracket 10 by screws. The guiding wheel is rotatably installed on the mounting seat. A belt passing hole 13 is provided on the concave surface 11 of the bracket 10. The toothed belt 20 passes through the belt passing hole 13 and cooperates with the guiding wheel. Thus, the toothed belt 20 passes through the belt passing hole 13 and is located below the concave surface 11, and the winding plate 30 is located above the concave surface 11. When the toothed belt 20 is pulled, the winding plate 30 slides along the arc surface of the concave surface 11. It can be understood that if it is defined that the toothed belt 20 extends to the first end of the concave surface 11 after passing through the gap between the winding plate 30 and the concave surface 11, the belt passing hole 13 is located at a position of the concave surface 11 close to the first end.

[0050] Specifically, the mounting base includes a first plate body and a second plate body. The first plate body and the second plate body are fixedly connected. In some embodiments of the present invention, the first plate body and the second plate body are integrally formed metal structural members. The included angle between the first plate body and the second plate body is less than 90°. The first plate body is fixed to the bottom of the bracket 10 by screws. The second plate body is provided with a square through hole, and the guide wheel is rotatably installed on the side wall of the square through hole. A channel for the toothed belt 20 to pass through is formed between the hole wall of the square through hole and the guide wheel. When the toothed belt 20 is pulled, the guide wheel rotates to guide the transmission direction of the toothed belt 20, making the movement process of the toothed belt 20 smoother and avoiding jamming. In some embodiments of the present invention, the guide wheel is fixedly installed on the rotating shaft, and both ends of the rotating shaft are rotatably connected to the hole wall of the square through hole. In still other embodiments of the present invention, the guide wheel can also be rotatably installed on the rotating shaft, and both ends of the rotating shaft are fixedly connected to the hole wall of the square through hole. Among them, the guide wheel is a gear or a roller.

[0051] As Figure 3 and Figure 5 shown, the base 71 includes a base body 700 and a limit seat 710. The limit seat 710 is movably installed on the base body 700, and an elastic member 72 is provided between the limit seat 710 and the base body 700. Under the action of the elastic member 72, the limit seat 710 moves up and down relative to the base body 700 in the vertical direction. Among them, the top surface of the limit seat 710 is arc-shaped, and card holes 711 are respectively provided at the straight ends of the arc-shaped structure. The toothed belt 20 passes through one of the card holes 711 and exits from the other card hole 711. When the driving gear 74 meshes with the toothed belt 20, the non-toothed surface of the toothed belt 20 abuts against the arc-shaped top surface.

[0052] As Figure 3 shown, the limit seat 710 includes a first limit seat 712 and a second limit seat 713. The first limit seat 712 and the second limit seat 713 have the same structure and are fixedly connected together by screws. The first limit seat 712 and the second limit seat 713 with the same structure can reduce the molds required for manufacturing the limit seat, and at the same time can also avoid assembly errors and improve the assembly efficiency.

[0053] As Figure 5As shown, a pair of bearings 75 are respectively installed on the first limit seat 712 and the second limit seat 713. One bearing 75 on the first limit seat 712 and one bearing 75 on the second limit seat 713 are coaxially arranged and connected by a guide shaft 76. The other bearing 75 on the first limit seat 712 and the other bearing 75 on the second limit seat 713 are coaxially arranged and connected by another guide shaft 76. The shaft diameters at both ends of the guide shaft 76 are smaller than the shaft diameter in the middle, that is, the guide shaft 76 is a shaft body that is thick in the middle and thin at both ends. The arc-shaped top surface of the limit seat 710 is provided with through holes. The middle parts of the two guide shafts 76 are thicker and protrude from the through holes to abut against the toothed belt 20 to support the toothed belt 20. When the limit seat 710 floats upward, the guide shaft 76 pushes against the toothed belt 20 so as to engage with the moving gear 74.

[0054] When an inflatable airbag is used as the elastic member 72, the toothed belt 20 and the moving gear 74 can be engaged or disengaged. Further, a compression spring 77 is also provided between the limit seat 710 and the seat body 700. When the inflatable airbag is inflated, the limit seat 710 is pushed up, and the compression spring 77 is compressed to store energy. When the inflatable airbag deflates, the compression spring 77 rebounds to release energy, so that the toothed belt 20 and the moving gear 74 are quickly disengaged from the engaged state.

[0055] As Figure 3 shown, the seat body 700 includes a bottom plate 701 and a limit frame 702. The bottom plate 701 is used to support the limit seat 710, and the limit frame 702 is used to install the compression spring 77. The bottom plate 701 is a plate body with flanges on two opposite sides. The inflatable airbag is fixedly installed in the card slot formed by the two flanges of the bottom plate 701. The limit frame 702 includes a cross plate and vertical plates connected to opposite ends of the cross plate. Connecting ears are provided at the ends of the vertical plates far from the cross plate, which facilitates connection with other structures. The compression spring 77 is installed between the bottom of the cross plate of the limit frame 702 and the top surface of the support ear of the limit seat 710. In order to prevent external dust from entering, the two vertical plates of the limit frame 702 are connected by a connecting vertical plate, and the connecting vertical plate is also fixedly connected to the side of the cross plate. It should be noted that the limit frame 702 is a sheet metal part formed integrally.

[0056] Specifically, the limit seat 710 protrudes outward with support ears, and two compression springs 77 are installed on each support ear. Columns are provided on the support ears, and guide columns corresponding to the columns are provided on the limit frame 702 of the seat body 700. One end of the compression spring 77 is sleeved on the column, and the other end is sleeved and fixed on the guide column. There is a gap between the guide column and the column to provide an activity distance for the up and down movement of the limit seat 710. The limit seat 710 is generally square, and a compression spring 77 is arranged at each of the four corners of the square. The bottom of the compression spring 77 abuts against the support ear of the limit seat 710, and the other end of the compression spring 77 abuts against the lower surface of the cross plate of the limit frame 702 of the seat body 700.

[0057] Further, a position identification member is provided at the movable end of the toothed belt 20, and a detection unit is installed on the bracket 10. The detection unit cooperates with the position identification member to determine the movement limit position of the toothed belt 20 when the winding plate 30 is opened, so as to prevent the toothed belt 20 from slipping off the limit seat 710. The driving member 73 is communicatively connected to the detection unit. When the detection unit detects the position identification member, the driving member 73 stops driving the moving gear 74. The driving member 73 stops driving according to the detection result of the detection unit, so as to prevent the winding plate 30 from opening excessively. During the process of the driving member 73 driving to tighten the winding plate 30, the driving member 73 controls the start and stop according to the resistance feedback by the human arm. When the resistance feedback by the human arm reaches a preset value, the driving member 73 stops driving, indicating that the cuff 40 has been tightened.

[0058] In some embodiments of the present invention, the position identification member is a coating layer or a sticker provided on the toothed belt 20, and the color of the coating layer or the sticker is different from that of the toothed belt 20. An optoelectronic sensor is installed on the bracket 10 as the detection unit. The optoelectronic sensor emits infrared light and senses the intensity of the light reflected back by the coating layer or the sticker, and identifies the position of the toothed belt 20 through the change in the light intensity. In still other embodiments of the present invention, the position identification member is a magnet, and a Hall sensor is installed on the bracket 10 as the detection unit. The position of the toothed belt 20 is identified by means of the cooperation between the Hall sensor and the magnet. Among them, the Hall sensor detects the change in magnetic flux, and the position of the toothed belt 20 can be obtained according to the change in magnetic flux. There are two position identification members. When one of the position identification members fails, the other position identification member is enabled as a supplement. The two position identification members provide double insurance to prevent the toothed belt 20 from slipping.

[0059] In the electronic sphygmomanometer provided by the embodiment of the present invention, the inflation airbag is inflated, driving the limit seat 710 to float upward, so that the toothed belt 20 meshes with the moving gear 74, and at the same time, the compression spring 77 is compressed to store energy. After the blood pressure measurement is completed, the driving member 73 moves in the reverse direction, driving the winding plate 30 to open. After opening to a preset position, the driving member 73 stops driving. At the same time, the inflation airbag exhausts air, and the compression spring 77 rebounds to release energy, so that the toothed belt 20 quickly disengages from the moving gear 74. In the electronic sphygmomanometer, during the automatic curling and opening process of the cuff 40, the transmission is stable. The toothed belt 20 is made of a plastic belt, with low noise, having buffering and shock-absorbing capabilities, and low energy consumption.

[0060] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transmission mechanism of an arm - type electronic sphygmomanometer, characterized in that, the transmission mechanism comprises a base, an elastic member, a driving member and a moving gear. The base comprises a seat body and a limiting seat. The limiting seat is used for movably mounting a toothed belt. The elastic member is installed between the seat body and the limiting seat. The driving end of the driving member is drivingly connected to the moving gear. The moving gear is used for meshing with the toothed belt. The elastic member is an inflatable airbag; the inflatable airbag is installed at the bottom of the base; and after the inflatable airbag is inflated and expanded, it drives the toothed belt to mesh with the moving gear. When the inflatable airbag releases gas, the toothed belt naturally relaxes and disengages from the moving gear; the transmission mechanism further comprises a compression spring. One end of the compression spring abuts against the top of the limiting seat, and the other end abuts against the inner wall of the top of the seat body; wherein, when the inflatable airbag is inflated, it drives the limiting seat to float upward, so that the toothed belt meshes with the moving gear. At the same time, the compression spring is compressed to store energy. After the blood pressure measurement is completed, the driving member moves in the reverse direction to drive the winding plate to open. After opening to a preset position, the driving member stops driving. At the same time, the inflatable airbag exhausts air, and the compression spring rebounds to release energy, so that the toothed belt quickly disengages from the moving gear.

2. The transmission mechanism of the arm - type electronic sphygmomanometer according to claim 1, characterized in that, there are four compression springs, and the four compression springs are arranged in a square array along the top surface of the limiting seat.

3. The transmission mechanism of the arm - type electronic sphygmomanometer according to claim 1, characterized in that, the seat body comprises a bottom plate and a limiting frame. The elastic member is fixedly installed at the bottom of the bottom plate and the limiting seat. The top surface of the limiting seat is provided with a compression - spring installation position. The limiting frame comprises a cross - plate parallel to the bottom plate, and the compression spring is received between the compression - spring installation position and the cross - plate.

4. The transmission mechanism of the arm - type electronic sphygmomanometer according to claim 1, characterized in that, the limiting seat comprises a first limiting seat and a second limiting seat with the same structure, and the first limiting seat is fixedly connected to the second limiting seat.

5. The transmission mechanism of the arm - type electronic sphygmomanometer according to any one of claims 1 to 4, characterized in that, the top surface of the limiting seat is arc - shaped, and card holes for the toothed belt to pass through are respectively provided at both ends of the arc - shaped top surface.

6. The transmission mechanism of the arm - type electronic sphygmomanometer according to claim 5, characterized in that, two guide shafts are rotatably installed in the limiting seat. The top surface of the limiting seat is provided with through - holes, and the guide shafts protrude from the through - holes to the top surface of the limiting seat so as to abut against the toothed belt.

7. The transmission mechanism of the arm - type electronic sphygmomanometer according to claim 6, characterized in that, the guide shaft is a rotating shaft with thin ends and a thick middle, and both ends of the guide shaft are connected to the limiting seat through bearings.

8. An electronic sphygmomanometer, characterized in that, it comprises the transmission mechanism of the arm - type electronic sphygmomanometer according to any one of claims 1 to 7.

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