JP2005076531A - Exhaust valve device to be used for blood pressure meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of part items and offer simpler and smaller construction for permitting easy assembly on equipment. <P>SOLUTION: A slit 37 is provided in the peripheral face of a valve element 13a of a quick exhaust valve 13. The slit 37 is normally closed. When quick exhaust is required, a driven gear 43 for a valve thruster 13b abuts on the side face of the valve element 13a to give deformation to the valve element 13a, by which the slit 37 is largely opened for quick exhaust through the opening of the slit 37. The valve element 13a of the quick exhaust valve 13 is formed integrally with a diaphragm body 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an exhaust valve device provided with a quick exhaust valve, and particularly in an embodiment, relates to an exhaust valve device of a sphygmomanometer having a quick exhaust valve for rapidly lowering the pressure in the cuff. Will be explained. The present invention is applicable not only to a sphygmomanometer but also to a device having an exhaust valve device having various quick exhaust valves.

  An oscillometric sphygmomanometer, for example, pressurizes a cuff wound around the upper arm to a predetermined pressure with an air pump, presses the artery to temporarily block blood flow, then gradually lowers the pressure in the cuff with a constant speed exhaust valve, The pattern of the cuff internal pressure and vibration amplitude accompanying the pulsation is processed by a microcomputer, and the systolic blood pressure and the diastolic blood pressure are measured. Further, after the measurement process, the pressure in the cuff is rapidly lowered by the quick exhaust valve.

  In general, the characteristic of a constant speed exhaust valve used in a sphygmomanometer is that the pressure in the cuff is linearly lowered with time at a constant speed of about 3 to 4 mmHg / sec. In addition, it is preferably lowered linearly.

  The applicant has already filed a small pump used as an air pump for a conventional sphygmomanometer exhaust valve device (see, for example, Patent Document 1). A conventional sphygmomanometer exhaust valve device using this small pump has a structure as shown in FIG. 7, for example.

  In FIG. 7, an exhaust valve device 1 of a sphygmomanometer includes a small pump 2 driven by a motor, a constant speed exhaust valve 3 (for example, see Patent Document 2) that exhausts at a constant speed through a slit, and a plunger, for example. It consists of a quick exhaust valve 4 to be driven, and a tubular body 5 having flexibility.

  The constant speed exhaust valve 3 and the quick exhaust valve 4 are made separately from the small pump 2, and are connected by a pipe body 5. In addition to mutually connecting the exhaust hole 6 of the small pump 2, the constant speed exhaust valve 3, and the quick exhaust valve 4, the tube body 5 is also connected to a cuff (not shown) wound around the upper arm, for example. The pipe body 5 is formed with an air passage 8 communicating with the pump chamber 7 of the small pump 2, the constant speed exhaust valve 3, the quick exhaust valve 4, and the cuff.

  In the exhaust valve device 1 made in this way, when the small pump 2 is driven and air is taken into the pump chamber 7 from the outside, the air in the pump chamber 7 passes through the exhaust hole 6 and enters the pipe body 5. It is fed into the air path 8, which is fed into the cuff through the air path 8 in the tube 5. When the pressure in the cuff is increased to a predetermined pressure, exhaust in the air path 8 by the constant-speed exhaust valve 3 is started, and the amount of air exhausted from the constant-speed exhaust valve 3 while proceeding simultaneously with this. A greater amount of air is pumped from the pump chamber into the cuff.

Further, when the inside of the cuff is pressurized to a predetermined pressure, the operation of the small pump 2 is stopped. Thereby, the pressure in the cuff is gradually lowered using the constant speed exhaust of the constant speed exhaust valve 3. At this time, the cuff internal pressure and vibration amplitude patterns associated with arterial pulsation are processed by a microcomputer to measure the systolic blood pressure and the diastolic blood pressure. After the measurement process, the quick exhaust valve 4 is opened, and the pressure in the cuff is rapidly lowered.
JP 2002-106471 A Japanese Utility Model Publication No. 63-14809

As described above, in the conventional sphygmomanometer exhaust valve device 1, the constant speed exhaust valve 3 and the quick exhaust valve 4 are made separately from the small pump 2. For this reason, the number of parts is large, the structure is complicated, and the cost is increased.

  Conventionally, as a driving means for operating the quick exhaust valve 4, for example, a dedicated plunger is provided and operated. For this reason, in addition to the increase in the number of parts and the complexity of the structure, there is a problem that the weight is increased and the apparatus is enlarged.

  Furthermore, since the constant speed exhaust valve 3 and the quick exhaust valve 4 are made separately from the small pump 2, the piping structure (air path 8) of the pipe body 5 connecting between them is complicated. Yes. Since the tube body 5 is exposed to the outside of the exhaust valve device 1, the tube body 5 is another member when the exhaust valve device 1 is assembled to the sphygmomanometer body, in addition to the problem of increasing the size of the device. There is a problem that it is difficult to assemble because it sometimes bends when touching.

  Therefore, there arises a technical problem to be solved in order to obtain a structure that can be easily assembled to a sphygmomanometer, as well as a reduction in the number of parts, simplification and miniaturization of the structure, and the present invention solves this problem. With the goal.

The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 operates a pump case in which a diaphragm that forms a pump chamber communicating with an air-filled body is installed, and the diaphragm. A motor case with a built-in motor, and a quick exhaust valve that linearly and rapidly lowers the pressure in the air-filled body, or a constant pressure that gradually lowers the pressure in the air-filled body at a substantially constant speed. A quick exhaust valve and a quick exhaust valve that linearly and rapidly lowers the pressure in the air-filled body, the diaphragm is operated by driving of the motor, and air is sucked into the pump chamber, from the exhaust hole In the exhaust valve device comprising a pump configured to be exhausted into the air-filled body and having a circuit for controlling the drive of the motor, the quick exhaust valve The valve body includes a valve pressing body that operates the valve body, and the valve body is formed in a tube shape having a conduit that communicates with the inside of the air-filled body and having a closed end. In addition, a slit that leads to the inside of the pipe line is provided on the peripheral surface,
The valve pressing body receives the driving force of the motor and collides with the valve body to press the valve body. The pressing force deforms the peripheral surface of the valve body to open the slit. Provided is an exhaust valve device configured to linearly and rapidly lower the pressure in an air filling body.

  According to this configuration, when the driving force of the motor that drives the pump is used, the valve pressing body is operated with the driving force, and the valve pressing body is abutted against the peripheral surface of the valve body and pressed, the valve body As a result of this deformation of the valve body, a slit is greatly opened, and a quick exhaust valve capable of rapidly exhausting air in the pipeline through the slit is obtained.

  According to a second aspect of the present invention, the valve pressing body includes a driving gear attached to a rotational driving shaft of the motor so as to be integrally rotatable, a driven gear rotatable integrally with the driving gear, and one end side of the driving gear being the driving gear. The swinging lever is pivoted about the central axis of the shaft, and the driven gear is rotatably attached to the other end via a clutch portion. The swinging lever rotates the motor in the forward direction. The driven gear is configured to rotate in a direction away from the valve body when rotated, and to rotate in a direction in which the driven gear collides with the valve body when rotated in the opposite direction. An exhaust valve device is provided.

  According to this configuration, when the motor is rotated in the forward direction, the driven gear of the valve pressing body abuts on the peripheral surface of the valve body, the peripheral surface of the valve body is deformed, and the slit of the quick exhaust valve is greatly opened. Thus, the air in the pipe line can be exhausted rapidly through the slit. When the motor is rotated in the reverse direction, the valve pressing body is separated from the valve body of the quick exhaust valve, the press is released, the valve body deformation of the quick exhaust valve is eliminated, the slit is closed, and the exhaust is stopped.

  According to a third aspect of the present invention, the motor rotates in a reverse direction, the valve pressing body is rotated in a direction to abut against the valve body, abuts on the valve body and presses the valve body, By detecting the opening of the slit by deforming the peripheral surface of the valve body by the pressing force, the applied voltage of the motor is cut off, and the peripheral surface is deformed by the pressing force to open the slit. 3. The exhaust valve according to claim 1, wherein a stopper for holding the valve pressing body is provided at a position where the slit holds a necessary and sufficient opening even when the applied voltage of the motor is cut off by the reaction force of the valve body. Providing equipment.

  According to this configuration, the driven gear of the valve pressing body abuts on the circumferential surface of the valve body, the circumferential surface of the valve body is deformed, and the slit of the quick exhaust valve is kept wide open. It is possible to secure a sufficient time necessary for rapidly exhausting the air in the pipe line, rotate the motor in the reverse direction for a predetermined time, or use a sensor to detect that the slit has been opened, and By cutting off the applied voltage, it is possible to suppress the consumption of excess power and avoid the danger caused by heat generation of the motor.

  According to a fourth aspect of the present invention, the valve body of the quick exhaust valve is formed integrally with the diaphragm, the valve body of the constant speed exhaust valve is formed integrally with the diaphragm, or the quick exhaust valve The exhaust valve device for a sphygmomanometer according to claim 1, 2 or 3, wherein the valve body and the valve body of the constant speed exhaust valve are simultaneously formed integrally with the diaphragm.

  According to this structure, in addition to the valve body of the quick exhaust valve, the valve body of the constant speed exhaust valve is integrally formed with the diaphragm, and some of the parts constituting the constant speed exhaust valve can also be used as the diaphragm. The number of points can be reduced, the structure can be simplified, and the size and weight can be reduced, and the assembling work into the exhaust valve device body can be further simplified.

  According to a fifth aspect of the present invention, there is provided a pump case in which a diaphragm that forms a pump chamber communicating with an air-filled body through an exhaust hole, a motor case in which a motor for operating the diaphragm is housed, and the air-filled body A quick exhaust valve that linearly and rapidly lowers the pressure of the air-filled air, or a constant-speed exhaust valve that gradually lowers the pressure in the air-filled body at a substantially constant speed, and a pressure that is linear in the air-filled body And a quick exhaust valve that rapidly descends, the diaphragm is operated by driving the motor, and air is sucked into the pump chamber and exhausted from the exhaust hole into the air-filled body. In an exhaust valve device including a pump and a circuit for controlling driving of the motor, the valve body of the quick exhaust valve passes through the exhaust hole and is filled with air. To provide an exhaust valve device formed in the tube body integrally having a flexible leading to the body.

  According to this configuration, the valve body of the quick exhaust valve is formed integrally with a flexible tube that communicates with the air-filled body, and a part of the parts constituting the quick exhaust valve can also serve as a diaphragm. The number of parts can be reduced, the structure can be simplified, the size and weight can be reduced, and the assembly work into the exhaust valve body can be simplified.

  According to a sixth aspect of the present invention, the quick exhaust valve includes the valve body and a valve pressing body that operates the valve body, and the valve body has a tip closed and a circumferential surface inside the pipe line. The valve pressing body receives the driving force of the motor and abuts against the valve body and presses the valve body by the pressing force. The exhaust valve device according to claim 5, wherein the slit is opened by deforming a peripheral surface of a body.

  According to this configuration, when the driving force of the motor that drives the pump is utilized, the valve pressing body is operated with the driving force, and the valve pressing body is abutted against the valve body and pressed, the periphery of the valve body is Due to the deformation of the valve body, a slit is greatly opened, and a quick exhaust valve capable of rapidly exhausting air in the pipe line through the slit is obtained.

  According to a seventh aspect of the present invention, the valve pressing body includes a drive gear attached to the output shaft of the motor so as to be integrally rotatable, a driven gear rotatable integrally with the drive gear, and one end side of the drive gear. The swing lever is pivoted about the center, and the driven gear is rotatably attached to the other end side via a clutch portion. The swing lever is configured to rotate the motor in the forward direction. The exhaust according to claim 5 or 6, wherein the driven gear is rotated in a direction in which the driven gear abuts with the valve body, and when the driven gear is rotated in the opposite direction, the driven gear is rotated in a direction away from the valve body. A valve device is provided.

  According to this configuration, when the motor is rotated in the opposite direction, the driven gear of the valve pressing body abuts on the peripheral surface of the valve body, and the peripheral surface of the valve body is deformed. The air in the pipe line can be exhausted rapidly through the slit. On the contrary, when the motor is rotated in the forward direction, the valve pressing body is separated from the valve body of the quick exhaust valve, the pressing is released and the deformation is eliminated, the slit is closed and the exhaust is stopped.

  In the invention according to claim 8, the motor rotates in the reverse direction, the valve pressing body is rotated in a direction to abut against the valve body, and abuts on the valve body to press the valve body, By detecting the opening of the slit by deforming the peripheral surface of the valve body by the pressing force, the applied voltage of the motor is cut off, and the peripheral surface is deformed by the pressing force to open the slit. The stopper of holding the said valve press body in the position which hold | maintains the said slit required and sufficient opening even if the applied voltage of the said motor is interrupted | blocked with the reaction force of the said valve body, The 6th, 7th, or 7th was provided. An exhaust valve device is provided.

  According to this configuration, the driven gear of the valve pressing body abuts on the circumferential surface of the valve body, the circumferential surface of the valve body is deformed, and the slit of the quick exhaust valve is kept wide open. It is possible to secure a sufficient time necessary for rapidly exhausting the air in the pipeline, and to detect that the slit has been opened by rotating the motor in the reverse direction for a predetermined time or using a sensor, By cutting off the voltage applied to the motor, it is possible to suppress the consumption of excess power and avoid the danger caused by heat generation of the motor.

  According to a ninth aspect of the present invention, there is provided the exhaust valve device for a sphygmomanometer according to the fifth, sixth, seventh or eighth aspect, wherein the valve body of the constant speed exhaust valve is formed integrally with the diaphragm.

  According to this configuration, in addition to forming the valve body of the quick exhaust valve integrally with the flexible pipe body that communicates with the air-filled body, the valve body of the constant speed exhaust valve is integrated with the diaphragm. The diaphragm is part of the components that make up the constant-speed exhaust valve, so the number of parts can be reduced, the structure can be simplified, and the size and weight can be reduced. Further simplification can be achieved.

  The exhaust valve device according to the first aspect of the present invention uses the driving force of the motor that drives the pump and operates the valve pressing body with the driving force. Thus, there is an advantage that parts such as a plunger, which has been a cause of an increase in size, can be eliminated, cost can be reduced, and further reduction in size and weight can be achieved.

  Furthermore, when the valve pressing body is pressed against the peripheral surface of the valve body and pressed, the periphery of the valve body is deformed, and the slit opens greatly by this deformation, and the air in the pipe line is rapidly exhausted through the slit. There is an advantage that a quick exhaust valve capable of performing the above is obtained.

  The exhaust valve device according to claim 2 of the present invention can control the exhaust and stop of exhaust of the quick exhaust valve only by switching the rotation direction of the motor. There is an advantage that simplification of the above becomes possible.

  The exhaust valve device according to claim 3 can detect the opening of the quick exhaust valve and can hold the opening of the quick exhaust valve, so that the voltage applied to the motor during the quick exhaust can be cut off. In addition to the effects of the described invention, there is an advantage that it is possible to suppress the consumption of extra power and avoid the danger due to the heat generation of the motor.

  The exhaust valve device for a sphygmomanometer according to claim 4 has a valve body of a constant speed exhaust valve integrally formed with a diaphragm in addition to a valve body of a quick exhaust valve, and a part of parts constituting the constant speed exhaust valve is also formed. In addition to the effects of the first, second or third aspect of the invention, it is possible to reduce the number of parts, simplify the structure, reduce the size and weight, and to the exhaust valve device main body. There is an advantage that the assembling work can be simplified.

  In the exhaust valve device according to claim 5, the valve body of the quick exhaust valve is formed integrally with a flexible pipe body that communicates with the air-filled body, and a part of the parts constituting the quick exhaust valve is piped. Since it is also used by the body, there are advantages that the number of parts can be reduced, the structure can be simplified, the size and weight can be reduced, and the assembling work into the exhaust valve device body can be simplified.

  The exhaust valve device according to claim 6 uses the driving force of the motor that drives the pump, and operates the valve pressing body with the driving force. Parts such as the plunger that caused the problem can be eliminated. Therefore, in addition to the effect of the invention of claim 5, there is an advantage that cost reduction and further reduction in size and weight are possible.

  Further, when the valve pressing body is abutted against the valve body and pressed, the periphery of the valve body is deformed, and by this deformation, the slit opens greatly, and the air in the pipe line can be rapidly exhausted through the slit. There is an advantage that an exhaust valve can be obtained.

  Since the exhaust valve device according to claim 7 can control the exhaust and exhaust stop of the quick exhaust valve only by switching the rotation direction of the motor, in addition to the effects of the invention according to claim 5 or 6, There is an advantage that simplification is possible.

  The exhaust valve device according to claim 8 can detect the opening of the rapid exhaust valve and can hold the opening of the rapid exhaust valve, so that the voltage applied to the motor during the rapid exhaust can be cut off. Alternatively, in addition to the effects of the invention described in 7, there is an advantage that it is possible to suppress the consumption of excess electric power and to avoid the danger due to heat generation of the motor.

  The exhaust valve device for a sphygmomanometer according to claim 9 is characterized in that in addition to forming the valve body of the quick exhaust valve integrally with a flexible pipe body that communicates with the air-filled body, Since the valve body is formed integrally with the diaphragm and a part of the parts constituting the constant speed exhaust valve is also used as the pipe body, in addition to the effects of the invention according to claim 5, 6, 7 or 8, There are advantages in that the number of parts can be reduced, the structure can be simplified, and the size and weight can be reduced.

  In order to achieve the objectives of reducing the number of parts, simplifying the structure, reducing the size and cost, and obtaining a structure that can be easily assembled to a sphygmomanometer, opening and closing of the valve body of the quick exhaust valve is performed in forward and reverse rotation of the motor. And the valve body of the quick exhaust valve is formed integrally with a flexible tube that communicates with the diaphragm or cuff.

  FIG. 1 is a longitudinal sectional view showing a first embodiment of an exhaust valve device for a sphygmomanometer according to the present invention. In FIG. 1, the sphygmomanometer exhaust valve device 10 includes a small pump 11, and has a structure in which a constant speed exhaust valve 12 and a quick exhaust valve 13 are provided in the small pump 11.

  The small pump 11 is provided with a diaphragm body 16 having two diaphragm portions 16a and 16a forming pump chambers 15 and 15 in a pump case 14 having a rectangular shape in plan view. The diaphragm body 16 is formed of a flexible member, for example, a rubber material having elasticity, or a soft plastic material. Further, hollow attachment bodies 17 and 17 are provided projecting downward from the lower central part of the respective diaphragm portions 16a and 16a of the diaphragm body 16, and the diaphragm portions 16a and 16a are provided below the diaphragm body 16, respectively. An oscillating body 18 that moves up and down the lower surface is provided. The pump case 14 is composed of three stages of an upper case 14a, an intermediate case 14b, and a lower case 14c. The diaphragm body 16 has a flange 16b of the diaphragm body 16 so that the upper case 14a and the intermediate case 14b. And is held by the pump case 14.

  Shaft bodies 19 and 19 having air introduction holes 19a and 19a are provided in the vicinity of the periphery of the rocking body 18 and below the center portions of the diaphragm portions 16a and 16a. Is provided. The hollow inner surfaces of the hollow mounting bodies 17 and 17 provided in the diaphragm portions 16a and 16a are tightly fitted to the outer surfaces of the shaft bodies 19 and 19, and the diaphragm portion 16a is fitted to the swinging body 18 by the tight fitting. 16a are attached.

  In addition, the diaphragm central portions 16a and 16a are partially incised at the bottom central portion to form intake valve bodies 20 and 20, and through holes 21 and 21 are provided by the incision. 20, the through holes 21, 21 can be closed and opened to form intake valve portions V1, V1.

  Further, an eccentric rotating shaft 22 that rocks the rocking body 18 by eccentric rotation is fixed to the center of the rocking body 18 so as to penetrate therethrough. An extending portion 23 is provided above the oscillating body 18 so as to extend from the middle case 14 b, and a recessed portion 24 that opens downward is formed below the extending portion 23. On the other hand, a driving gear 27 as a rotating body is fixed to the upper end of the rotational driving shaft 26 of the motor 25 disposed on the lower side of the lower case 14c, and is recessed at a position away from the center position of the upper portion of the driving gear 27. 28 is formed. The lower end of the eccentric rotating shaft 22 whose upper end is loosely fitted in the concave portion 24 is loosely fitted in the concave portion 28.

  Further, the central portion 46 of the upper case 14 a protrudes upward like a nozzle, and an exhaust hole 29 is opened at the central portion of the central portion 46. On the lower surface side of the upper case 14a, there are provided two annular concave grooves 30, 30 that open to the outer periphery of the exhaust hole 29 and communicate with the exhaust hole 29. Exhaust valve parts V2 and V2 are configured by press-contacting exhaust valve bodies 31 and 31 including the diaphragm parts 16a and 16a to inner wall surfaces 30a and 30a forming the annular concave grooves 30 and 30, respectively. The exhaust hole 29 is tightly connected to a flexible tube 47 that leads to a cuff (not shown) that is an air-filled body.

  A motor case 32 that houses the motor 25 connected to the rotational drive shaft 26 is fixed to the lower case 14c. The lower case 14c and the motor case 32 are attached to the lower case 14c and the motor case 32, respectively. And at least one intake hole 34 for introducing outside air into the motor case 32 is formed below the motor case 32.

  The constant-velocity exhaust valve 12 is provided corresponding to an annular groove 30 communicating with the cuff through the exhaust hole 29, a valve body 12a formed in a part of the diaphragm body 16, and the valve body 12a. And an adjusting member 12b attached to the middle case 14b.

  The valve body 12a is formed integrally with the diaphragm body 16 so that a part of the diaphragm body 16 protrudes upward in the shape of a nozzle in the annular groove 30 and the upper end thereof is closed. . Further, a slit 35 leading to the inside is formed on the peripheral surface of the valve body 12a along the longitudinal direction (vertical direction) of the valve body 12a. The adjustment member 12b is made as a screw body that is screwed into a screw hole provided in the hollow inner surface of the hollow cylindrical portion 36 formed in the middle case 14b. Therefore, when the adjustment member 12b is screwed into the hollow cylindrical portion 36, the adjustment member 12b moves up or down in the hollow cylindrical portion 36 depending on the direction in which the adjustment member 12b is rotated.

  In the constant speed exhaust valve 12, when the adjustment member 12b is screwed upward, the valve body 12a is sandwiched between the inner surface of the upper case 14a and the upper end of the adjustment member 12b and compressed in the vertical direction. And deform. That is, the constant-speed exhaust valve 12 changes the amount of deformation of the peripheral surface on the valve body 12a side when the screwing amount of the adjusting member 12b is changed, and the change in the amount of deformation causes air to pass through the central through hole of the adjusting member 12b. The opening amount of the constant speed exhaust valve 12 by the slit 35 to be discharged can be variably set, and the speed at which the pressure in the cuff is gradually lowered by the constant speed exhaust valve 12 can be adjusted by the setting. This adjustment is an adjustment at the time of assembly and is not performed after assembly except for maintenance and inspection.

  FIG. 2 also shows the detailed structure of the quick exhaust valve 13. Further explanation will be made with reference to FIG. 2. The quick exhaust valve 13 is provided corresponding to the annular concave groove 30 communicating with the inside of the cuff through the exhaust hole 29 in the same manner as the constant speed exhaust valve 12. 16 comprises a valve body 13a formed in a part of 16 and a valve pressing body 13b for operating the valve body 13a. The middle case 14b is provided with a hollow cylindrical portion 36 corresponding to the location where the valve body 13a is formed.

  The valve body 13a is formed integrally with the diaphragm body 16 by projecting a part of the diaphragm body 16 downward in a nozzle shape. Therefore, since the valve body 13a is formed of the same member as the diaphragm body 16, it can be elastically deformed. The valve body 13a passes through the hollow cylindrical portion 60 of the middle case 14b and hangs in the lower case 14c, and the tip is closed, and the valve body 13a is formed on the peripheral surface of the portion protruding into the lower case 14c. The slit 37 is formed along the longitudinal direction (vertical direction) of the valve body 13a. Further, an abutting tooth portion 38 is integrally formed on the outer peripheral surface of the distal end portion of the valve body 13a so as to protrude outward from the outer peripheral surface.

  The valve pressing body 13b passes through the center through hole 39 of the lower case 14c, and has a swing lever 41 that is rotatably attached at one end side to a bearing portion 40 that protrudes into the lower case 14c together with the rotary drive shaft 26. The pivot 42 is mounted on the swing lever 41, the driven gear 43 is rotatably mounted on the swing lever 41 via the pivot 42, and the coil spring 44 for clutch. ing. The lower case 14c includes a pin-shaped stopper 45R for restricting the amount of rotation of the swing lever 41 in the right direction and a pin-shaped stopper 45L for restricting the amount of rotation in the left direction. Provided (see FIG. 2).

  A driven gear 43 attached to the swing lever 41 via a pivot shaft 42 is screwed with a drive gear 27 attached to the rotary drive shaft 26. Therefore, when the motor 25 is driven and the rotary drive shaft 26 and the drive gear 27 are rotated together, the driven gear 43 is also rotated integrally with the drive gear 27.

  The coil spring 44 forms a clutch portion between the driven gear 43 and the swing lever 41, and swings the lower surface of the driven gear 43 between the head portion 42 a of the pivot 42 and the driven gear 43. The lever 41 is attached in a state where it is lightly pressed against the upper surface of the lever 41.

  When the drive gear 27 is rotated in the forward direction (arrow A in FIG. 2) together with the rotational drive shaft 26 by the forward rotation of the motor 25, the driven gear 43 is also moved in the forward direction (FIG. 2). It is rotated in the direction of arrow a). Further, at this time, clutch friction is generated between the driven gear 43 and the swing lever 41 due to the pressing of the coil spring 44. Therefore, the swing lever 41 is in the direction of arrow C in FIG. In addition, the swing lever 41 rotates until it makes contact with the stopper 45R. When the swing lever 41 abuts against the stopper 45R to restrict the rotation, a portion frictionally coupled as a clutch (clutch portion) with the swing lever 41 slips, and only the driven gear 43 is driven while idling. Continue to rotate with the gear 27.

  In contrast, when the motor 25 is rotated in the reverse direction, the drive gear 27 is rotated in the reverse direction (arrow B in FIG. 2) together with the rotary drive shaft 26, and the driven gear 43 is also rotated in the reverse direction (arrow b in FIG. 2). Direction). Further, at this time, clutch friction is generated between the driven gear 43 and the swing lever 41 due to the pressing of the coil spring 44. Therefore, the swing lever 41 is in the direction of arrow C in FIG. Then, the swing lever 41 rotates until it abuts against the stopper 45L.

  Further, the abutting tooth portion 38 of the valve body 13a swings (horizontal rotation) within a range regulated by the stopper 45R and the stopper 45L, and the driven gear 43 together with the swing lever 41 is positioned in the direction of the arrow O. When the fixed amount of rotation is made, it is possible to collide with the driven gear 43.

  In the quick exhaust valve 13, when the motor 25 is rotated in the forward direction and the swing lever 41 is disposed in the closed position regulated by the stopper 45R together with the driven gear 43, the valve body 13a is straight down. It protrudes toward. In this state, the slit 37 is closed and the valve body 13a is in a closed state. 3A and 3B show the operation of the quick exhaust valve 13, and FIG. 3A shows this closed state.

  On the other hand, when the motor 25 is rotated in the reverse direction and the swing lever 41 is rotated by a predetermined amount in the direction of the arrow O together with the driven gear 43, the driven gear 43 is engaged with the abutting tooth portion of the valve body 13a. 38. Further, when further rotated, the abutting tooth portion 38 is moved together with the valve body 13a to the open position side restricted by the stopper 45L, and this movement causes the peripheral surface of the valve body 13a to be deformed. The air in the valve body 13a, that is, the air in the cuff can be rapidly and linearly extracted with time through the slit 37. FIG. 3B shows this open state.

  Further, if the motor 25 continues to rotate in the reverse direction in this state, the swing lever 41 is abutted against the stopper 45L and the rotation is restricted, so that the abutting tooth portion 38 of the valve body 13a and the driven gear 43 are impinged. The part (clutch part) frictionally coupled as a clutch with the swing lever 41 is slipped while being engaged, and the driven gear 43 is idled while being frictioned against the abutting tooth part 38 of the valve body 13a. At the same time, the motor 25 continues to rotate or becomes unrotatable, and the current of the motor 25 increases rapidly, causing not only an increase in power consumption but also a risk of heat generation. After a lapse of time, the voltage applied to the motor 25 is cut off. FIG. 6A shows a block diagram of the drive control circuit of the motor. Further, as described above, instead of the method of cutting off the voltage applied to the motor 25 after a predetermined time has elapsed since the motor 25 started to rotate in the reverse direction, the position of the swing lever 41 or the air in the cuff is timed. At the same time, various methods are conceivable, such as cutting off the voltage applied to the motor 25 by a method such as detecting a sudden pressure drop due to a rapid and straight-out by a sensor. FIG. 6B shows a block diagram of a motor drive control circuit using a method of detection by the sensor.

  Further, the reaction force N obtained by deforming the peripheral surface of the valve body 13a shown in FIG. 2 acts in a direction in which the swing lever 41 is brought into contact with the stopper 45L, and the air in the cuff is rapidly and linearly extracted with time. Even if the applied voltage of the motor 25 is cut off and the rotation of the motor is stopped by disposing the stopper 45L at a position where the opening of the slit 37 on the peripheral surface of the valve body 13a can be secured, the peripheral surface of the valve body 13a The opening of the slit 37 can be held.

  Next, the operation of the exhaust valve device 10 of the sphygmomanometer having the above-described structure will be described. When the motor 25 is driven in the forward direction and the drive gear 27 is rotated by the rotation of the rotation drive shaft 26, the eccentric rotation shaft 22 is rotated eccentrically, whereby the rocking body 18 is rocked, and each diaphragm portion 16a of the diaphragm body 16 is rotated. , 16a is moved up and down. For example, when the lower end portion of one diaphragm portion 16a is moved downward, the inside of the diaphragm portion 16a becomes negative pressure, and the exhaust valve body 31 comes into close contact with the inner wall surface 30a of the annular groove 30 to form an exhaust valve. The portion V2 is closed, the intake valve body 20 opens the through hole 21 from the closed state, the intake valve portion V1 is opened, and intake is performed as indicated by an arrow E from the air introduction hole 19a into the diaphragm portion 16a.

  When the motor 25 is rotated in the forward direction, the swing lever 41 is moved to the closed position where it is in contact with the stopper 45R, and the driven gear 43 is separated from the valve body 13a of the quick exhaust valve 13. . Therefore, the slit 37 of the valve body 13a is closed, and the quick exhaust valve 13 is in a closed state.

  Next, when the lower end of the diaphragm portion 16a is moved up and down, the inside of the diaphragm portion 16a becomes high pressure, the intake valve body 20 closes the through hole 21, closes the intake valve portion V1, and the exhaust valve. The body 31 has a diameter larger than that of the inner wall surface 30a, and exhaust by the exhaust valve portion V2 is performed as indicated by an arrow F. The air exhausted from the exhaust valve body 31 is exhausted through a tube body 47 attached to a central portion 46 provided with an exhaust hole 29 communicating with the annular concave groove 30, and is sent to a cuff side (not shown).

  Then, when the pressure in the cuff is increased to a predetermined pressure, exhaust in the air path by the constant speed exhaust valve 12 is started, and the amount of exhaust larger than the amount of exhaust by the constant speed exhaust valve is advanced at the same time. Air is further fed into the cuff.

When the inside of the cuff is pressurized to a predetermined pressure, the motor 25 is stopped, that is, the pump operation is stopped. As a result, the air in the air path is gradually released using the constant speed exhaust valve 12, and at the same time, the pressure in the cuff is gradually lowered. At this time, the cuff internal pressure and vibration amplitude patterns associated with arterial pulsation are processed by a microcomputer to measure the systolic blood pressure and the diastolic blood pressure.

  After the measurement process, the motor 25 is rotated in the reverse direction, whereby the swing lever 41 is moved together with the driven gear 43 to the open position in the arrow O direction. By this movement, the driven gear 43 abuts with the abutting tooth portion 38 of the valve body 13 a to deform the peripheral surface of the valve body 13 a, and the slit 37 is greatly opened by this deformation, and through the slit 37, the inside of the valve body 13 a Air, i.e., the air in the cuff, is rapidly withdrawn linearly over time.

  Therefore, according to the sphygmomanometer exhaust valve device 10 configured as described above, the valve body 13a of the quick exhaust valve 13 is formed integrally with the diaphragm body 16, and the valve body 13a that should originally be prepared separately is formed. Since a part of the part also serves as a diaphragm, a part of the part of the valve body 13 a of the quick exhaust valve 13 may not be prepared separately from the diaphragm body 16. Thereby, the number of parts can be reduced, the structure can be simplified, and the size and weight can be reduced. Moreover, there is an advantage that the work of assembling the blood pressure monitor main body can be simplified.

  Furthermore, since the driving force of the motor 25 that drives the pump is used and the valve pressing body 13b is operated by the driving force, it is a heavy and large size used in the conventional device. Parts such as the plunger can be eliminated. Thereby, there is an advantage that the cost can be further reduced and the size and weight can be reduced.

  Further, when the valve pressing body 13b is pressed against the peripheral surface of the valve body 13a, the periphery of the valve body 13a is deformed, and the slit 37 is greatly opened by this deformation, and the air in the air path is passed through the slit 37. Therefore, there is an advantage that a quick exhaust valve having a simple structure can be obtained. Further, since the exhaust and exhaust stop of the quick exhaust valve 13 can be controlled only by switching the rotation direction of the motor 25, there is an advantage that the structure can be simplified as compared with the conventional structure.

  In addition to the valve body 13a of the quick exhaust valve 13, the valve body 12a of the constant speed exhaust valve 12 is also formed integrally with the diaphragm body 16, and a part of the valve body 12a is also used as the diaphragm body 16. Therefore, there is an advantage that the number of parts can be further reduced, the structure can be simplified, the size and weight can be reduced, and the assembling work into the sphygmomanometer body can be simplified.

  FIG. 5 is a longitudinal sectional view showing a second embodiment of the exhaust valve device of the sphygmomanometer according to the present invention. The configuration of the exhaust valve device of the sphygmomanometer in the second embodiment is that the valve body of the quick exhaust valve is formed integrally with a flexible tube that communicates with the cuff. Since it is the same as FIG.1 and FIG.2, the same code | symbol shall be attached | subjected about the same member and the description shall be abbreviate | omitted.

  In the structure of the second embodiment, the tube body 47 is a flexible member, for example, an elastically deformable rubber tube. One end of the tube body 47 is tightly fitted to the central portion 46 of the upper case 14a, the other end is tightly fitted to the valve body 13a of the quick exhaust valve 13, and an intermediate portion is connected to a cuff (not shown). A pipe structure in which a branch pipe 47a is formed.

  The detailed structure of the quick exhaust valve 13 is also shown in FIG. Further explanation will be made with reference to FIG. 5. The quick exhaust valve 13 includes a valve body 13a and a valve pressing body 13b for operating the valve body 13a. A through hole 48 through which the tubular body 47 penetrates is formed on the side surface of the lower case 14c, and a flange-like base portion of the valve body 13a disposed in the lower case 14c is formed on the inner surface of the lower case 14c. A mounting portion 50 for fixing 49 is provided.

  The valve body 13a has a tubular shape inside, the tip is closed, and an abutting tooth portion 38 is integrally formed at the tip so as to extend outward from the tip. A slit 37 is formed in the circumferential surface of the valve body 13a along the longitudinal direction of the valve body. In the state where the valve body 13a is attached to the lower case 14c, the valve pressing body 13b is moved to the abutment tooth portion 38 just before the valve pressing body 13b is moved in the opening position where the valve pressing body 13b collides with the stopper 45L. The driven gear 43 is arranged so that it can contact. Further, when the swing lever 41 is moved together with the driven gear 43 to the closed position, the peripheral surface of the valve body is deformed by the biting by the contact, and the slit 37 is greatly opened by this deformation, and the valve body is passed through the slit 37. The air in 13a, that is, the air in the cuff can be rapidly and linearly extracted with time. FIG. 5 shows this open state.

  Next, the operation of the exhaust valve device 10 of the sphygmomanometer having the above-described structure will be described. When the motor 25 is driven in the forward direction and the drive gear 27 is rotated by the rotation of the rotation drive shaft 26, the eccentric rotation shaft 22 is rotated eccentrically, whereby the rocking body 18 is rocked, and each diaphragm portion 16a of the diaphragm body 16 is rotated. , 16a is moved up and down. For example, when the lower end portion of one diaphragm portion 16a is moved downward, the inside of the diaphragm portion 16a becomes negative pressure, and the exhaust valve body 31 comes into close contact with the inner wall surface 30a of the annular groove 30 to form an exhaust valve. The portion V2 is closed, the intake valve body 20 opens the through hole 21 from the closed state, the intake valve portion V1 is opened, and intake is performed as indicated by an arrow E from the air introduction hole 19a into the diaphragm portion 16a.

  When the motor 25 is rotated in the forward direction, the swing lever 41 is moved to the closed position where it is in contact with the stopper 45R, and the driven gear 43 is separated from the valve body 13a of the quick exhaust valve 13. . Therefore, the slit 37 of the valve body 13a is closed, and the quick exhaust valve 13 is in a closed state.

  Next, when the lower end of the diaphragm portion 16a is moved up and down, the inside of the diaphragm portion 16a becomes high pressure, the intake valve body 20 closes the through hole 21, closes the intake valve portion V1, and the exhaust valve. The body 31 has a diameter larger than that of the inner wall surface 30a, and exhaust by the exhaust valve portion V2 is performed as indicated by an arrow F. The air exhausted from the exhaust valve body 31 is exhausted through a tube body 47 that is tightly fitted to a central portion 46 provided with an exhaust hole 29 that communicates with the annular concave groove 30, and is sent to the cuff side (not shown).

  Then, when the pressure in the cuff is increased to a predetermined pressure, exhaust in the air path by the constant speed exhaust valve 12 is started, and the amount of exhaust larger than the amount of exhaust by the constant speed exhaust valve is advanced at the same time. Air is further fed into the cuff.

When the inside of the cuff is pressurized to a predetermined pressure, the motor 25 is stopped, that is, the pump operation is stopped. As a result, the air in the air path is gradually released using the constant speed exhaust valve 12, and at the same time, the pressure in the cuff is gradually lowered. At this time, the cuff internal pressure and vibration amplitude patterns associated with arterial pulsation are processed by a microcomputer to measure the systolic blood pressure and the diastolic blood pressure.

  After the measurement process, the motor 25 is rotated in the reverse direction, whereby the swing lever 41 is moved together with the driven gear 43 to the open position in the arrow O direction. By this movement, the driven gear 43 abuts with the abutting tooth portion 38 of the valve body 13 a to deform the peripheral surface of the valve body 13 a, and the slit 37 is greatly opened by this deformation, and through the slit 37, the inside of the valve body 13 a Air, i.e., the air in the cuff, is rapidly withdrawn linearly over time.

  Therefore, according to the sphygmomanometer exhaust valve device 10 configured as described above, the valve body 13a of the quick exhaust valve 13 is formed integrally with the pipe body 47, and the valve body 13a that should originally be prepared separately. Since a part of the parts is also used as the pipe body 47, the number of parts can be reduced, the structure can be simplified, and the size and weight can be reduced. Moreover, there is an advantage that the work of assembling the blood pressure monitor main body can be simplified.

  Furthermore, since the driving force of the motor 25 that drives the pump is used and the valve pressing body 13b is operated by the driving force, it is a heavy and large size used in the conventional device. Parts such as the plunger can be eliminated. Thereby, there is an advantage that the cost can be further reduced and the size and weight can be reduced.

  Further, when the valve pressing body 13b is pressed against the valve body 13a, the periphery of the valve body 13a is deformed, and the slit 37 is greatly opened by this deformation, and the air in the air path is rapidly passed through the slit 37. Since the exhaust can be structured, there is an advantage that a quick exhaust valve having a simple structure can be obtained. Further, since the exhaust and exhaust stop of the quick exhaust valve 13 can be controlled only by switching the rotation direction of the motor 25, there is an advantage that the structure can be simplified as compared with the conventional structure.

  In addition, the valve body 12a of the constant speed exhaust valve 12 is formed integrally with the diaphragm body 16, and part of the valve body 12a in the constant speed exhaust valve 12 is also used as the diaphragm body 16. Reduction, simplification of the structure, reduction in size and weight, and incorporation of the blood pressure monitor main body can be simplified.

In the structures of the first and second embodiments, the case where the two diaphragm portions 16a are provided has been described. However, one or more diaphragm portions 16a may be provided.
Furthermore, the exhaust valve device of the present invention is not limited to a sphygmomanometer, and can be applied to devices having various exhaust valve devices.

  In addition, the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified one.

The longitudinal cross-sectional view of the exhaust valve apparatus of the blood pressure meter which concerns on Example 1 of this invention. FIG. 3 is a plan view showing the main configuration of an exhaust valve device for a blood pressure monitor according to Embodiment 1. FIG. 3 is an operation explanatory diagram of the exhaust valve device of the sphygmomanometer according to the first embodiment. The longitudinal cross-sectional view of the exhaust-valve apparatus of the blood pressure meter which concerns on Example 2 of this invention. FIG. 6 is a plan view showing the main configuration of an exhaust valve device for a sphygmomanometer according to a second embodiment. The circuit block diagram of the exhaust valve apparatus of the blood pressure meter which concerns on Example 1 and Example 2 of this invention. The longitudinal cross-sectional view of the exhaust valve apparatus of the conventional blood pressure meter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Exhaust valve apparatus 11 Small pump 12 Constant speed exhaust valve 12a Valve body 13 Rapid exhaust valve 13a Valve body 13b Valve press body 15 Pump chamber 16 Diaphragm body 16a Diaphragm part 18 Oscillating body 25 Motor 29 Exhaust hole 35 Slit 37 Slit 38 Tooth part 39 Center through hole 41 Oscillating lever 44 Coil spring 45R Stopper 45L Stopper 46 Center part 47 Tube

Claims (9)

A pump case with a diaphragm that forms a pump chamber that communicates with the inside of the air-filled body, a motor case with a motor that operates the diaphragm, and a rapid that rapidly decreases the pressure inside the air-filled body An exhaust valve, or a constant speed exhaust valve that gradually lowers the pressure in the air-filled body at a substantially constant speed, and a quick exhaust valve that linearly and rapidly lowers the pressure in the air-filled body The diaphragm is actuated by driving the motor, air is sucked into the pump chamber and exhausted from the exhaust hole into the air-filled body, and drive control of the motor is performed. In an exhaust valve device having a circuit to perform,
The quick exhaust valve is composed of the valve body and a valve pressing body that operates the valve body, and the valve body has a pipe line that communicates with the inside of the air-filled body and has a tubular shape with a closed end. And is provided with a slit leading to the inside of the pipe line on the peripheral surface,
The valve pressing body receives the driving force of the motor and collides with the valve body to press the valve body. The pressing force deforms the peripheral surface of the valve body to open the slit. An exhaust valve device characterized in that the pressure in the air filling body is linearly and rapidly lowered. The valve pressing body includes a drive gear attached to a rotary drive shaft of the motor so as to be integrally rotatable, a driven gear rotatable integrally with the drive gear, and one end side pivoted about the central axis of the drive gear And the other end side is composed of a swing lever to which the driven gear is rotatably attached via a clutch portion,
The swing lever rotates in a direction in which the driven gear is separated from the valve body when the motor is rotated in the forward direction, and a direction in which the driven gear abuts the valve body when rotated in the opposite direction. The exhaust valve device according to claim 1, wherein the exhaust valve device is configured to be pivoted to the right. The motor rotates in the reverse direction, the valve pressing body is rotated in a direction to abut against the valve body, abuts against the valve body and presses the valve body, and the pressing force Detecting that the peripheral surface is deformed and opening the slit, and cutting off the applied voltage of the motor,
Even if the applied voltage of the motor is cut off by the reaction force of the valve body that has opened the slit by deforming the peripheral surface by the pressing force, the valve pressing body is in a position that holds the slit necessary and sufficient. An exhaust valve device according to claim 1 or 2, further comprising a stopper for holding the valve.   The valve body of the quick exhaust valve is formed integrally with the diaphragm, the valve body of the constant speed exhaust valve is formed integrally with the diaphragm, or the valve body of the quick exhaust valve and the constant speed exhaust valve 4. The exhaust valve device for a sphygmomanometer according to claim 1, wherein said valve body is formed integrally with said diaphragm at the same time. A pump case with a diaphragm that forms a pump chamber that communicates with the air-filled body through the exhaust hole, a motor case with a motor that operates the diaphragm, and a pressure within the air-filled body are linearly and rapidly increased. A constant exhaust valve for gradually lowering the pressure in the air-filled body at a substantially constant speed, and rapid exhaust for rapidly lowering the pressure in the air-filled body linearly A pump provided with a valve, wherein the diaphragm is actuated by driving the motor, air is sucked into the pump chamber, and is exhausted from the exhaust hole into the air-filled body; In an exhaust valve device provided with a circuit for performing drive control,
An exhaust valve device characterized in that a valve body of the quick exhaust valve is formed integrally with a flexible tube body that leads to the air-filled body through the exhaust hole. The quick exhaust valve includes the valve body and a valve pressing body that operates the valve body, and the valve body has a distal end closed, and a slit that communicates with the inside of the pipe line is provided on the peripheral surface. Arranged in the pump case,
The valve pressing body receives the driving force of the motor and collides with the valve body to press the valve body, and the peripheral surface of the valve body is deformed by the pressing force to open the slit. The exhaust valve device according to claim 5, wherein The valve pressing body includes a drive gear attached to a rotary drive shaft of the motor so as to be integrally rotatable, a driven gear rotatable integrally with the drive gear, and one end side pivoted about the central axis of the drive gear And the other end side is composed of a swing lever to which the driven gear is rotatably attached via a clutch portion,
The swing lever rotates in a direction in which the driven gear is separated from the valve body when the motor is rotated in the forward direction, and a direction in which the driven gear abuts the valve body when rotated in the opposite direction. The exhaust valve device according to claim 5 or 6, wherein the exhaust valve device is configured to be pivoted to the right. The motor rotates in the reverse direction, the valve pressing body is rotated in a direction to abut against the valve body, abuts against the valve body and presses the valve body, and the pressing force Detecting that the peripheral surface is deformed and opening the slit, and cutting off the applied voltage of the motor,
Even if the applied voltage of the motor is cut off by the reaction force of the valve body that has opened the slit by deforming the peripheral surface by the pressing force, the valve pressing body is in a position that holds the slit necessary and sufficient. An exhaust valve device according to claim 5, 6 or 7, further comprising a stopper for holding the gas. The exhaust valve device for a sphygmomanometer according to claim 5, 6, 7 or 8, wherein the valve body of the constant-speed exhaust valve is formed integrally with the diaphragm.

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