JP2005076534A - Small pump with exhaust valve device and blood pressure meter using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of part items and offer simpler and smaller construction for easy assembly on other equipment. <P>SOLUTION: In a pump case 14 internally mounted with a diaphragm 16a forming a pump chamber 15 communicating with a pressure chamber, exhaust valves (a constant speed exhaust valve 12 and a quick exhaust valve 13) are provided for making air escape from the pressure chamber to reduce pressure in the pressure chamber. The pump chamber 15 and the exhaust valves are integrated with each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a small pump with an exhaust valve device and a sphygmomanometer using the small pump with the exhaust valve device, and in particular, for example, by sending air with a pump into a pressurized chamber such as a cuff of a sphygmomanometer. The present invention relates to a small pump with an exhaust valve device that pressurizes a pressurized chamber and releases the air after pressurization to lower the pressure in the pressurized chamber, and a sphygmomanometer using the small pump with the exhaust valve device.

  A small pump with an exhaust valve device for sending air with a pump into a pressurized chamber to pressurize the pressurized chamber and releasing the air after pressurization to reduce the pressure in the pressurized chamber is, for example, Used in oscillometric sphygmomanometers.

  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 applied for a conventional small pump of this kind (see, for example, Patent Document 1). Moreover, the small pump used with an exhaust valve apparatus has the structure as shown in FIG. 5, for example.

  The small pump with an exhaust valve device shown in FIG. 5 is an example of a case where it is used for a blood pressure monitor. A small pump 1 with an exhaust valve device used for a sphygmomanometer includes a small pump unit 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. And the quick exhaust valve 4 driven by the above and a flexible tubular body 5.

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

  The small pump 1 with an exhaust valve device made in this way, when the small pump portion 2 is driven and air is taken into the pump chamber 7 from the outside, the air in the pump chamber 7 is piped from the exhaust hole 6. It is fed into the air path 8 in the body 5, and this 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 larger amount of air is fed from the pump chamber 7 into the cuff.

  Further, when the inside of the cuff is pressurized to a predetermined pressure, the operation of the small pump unit 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 small pump 1 with the exhaust valve device, the constant speed exhaust valve 3 and the quick exhaust valve 4 are made separately from the small pump unit 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 an increase in the number of parts and a complicated structure, there is a problem that the weight is increased and the apparatus is increased in size.

  Furthermore, since the constant speed exhaust valve 3 and the quick exhaust valve 4 are made separately from the small pump part 2, the piping structure (air path 8) of the pipe body 5 connecting them is also complicated. It has become. Since the tubular body 5 is exposed to the outside of the exhaust valve device 1, when the exhaust valve device 1 is assembled to the apparatus main body, the tubular body 5 may come into contact with other members and bend, so that assembly work There was a problem that it was difficult.

  Therefore, there arises a technical problem to be solved in order to obtain a structure that is easy to assemble to other devices by reducing the number of parts and simplifying and downsizing the structure, and the present invention solves this problem. For the purpose.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that a pump case in which a diaphragm that forms a pump chamber communicating with a pressurized chamber is installed, and the diaphragm is operated. A motor case in which a motor for sucking air into the pump chamber and exhausting the air in the pump chamber into the pressurized chamber is installed, and the air exhausted from the pump chamber to the pressurized chamber An exhaust valve device-equipped small pump having an exhaust valve for releasing the pressure and lowering the pressure in the pressurized chamber is provided. The exhaust valve device-equipped small pump is provided in the pump case.

  According to this configuration, by providing the exhaust valve in the pump case, it is possible to obtain a small pump with an exhaust valve device in which the exhaust valve device and the small pump are integrated with no external piping.

  According to a second aspect of the present invention, the exhaust valve is a constant-speed exhaust valve that releases air in the pressurized chamber at a substantially constant speed and lowers the pressure in the pressurized chamber at a substantially constant speed. A small pump with an exhaust valve device according to Item 1 is provided.

  According to this configuration, a small pump with an exhaust valve device having a constant speed exhaust valve can be obtained.

  According to a third aspect of the present invention, the exhaust valve allows the air in the pressurized chamber to escape at a substantially constant speed and lowers the pressure in the pressurized chamber at a substantially constant speed; An exhaust valve device small-sized pump according to claim 1, comprising a quick exhaust valve that linearly and rapidly lowers the pressure in the pressurized chamber.

  According to this configuration, a small pump with an exhaust valve device having a constant speed exhaust valve and a quick exhaust valve can be obtained.

  According to a fourth aspect of the present invention, there is provided a small pump with an exhaust valve device according to the first, second or third aspect, wherein the exhaust valve is formed integrally with the diaphragm.

  According to this configuration, a part of the parts constituting the exhaust valve can be used as the diaphragm.

  According to a fifth aspect of the present invention, the exhaust valve is deformed by pressing the valve body with a tubular valve body having one end closed with a slit on the peripheral surface, and the opening of the slit is formed by the deformation. 5. A threaded adjusting member that is capable of adjusting the exhaust speed by adjusting the amount, wherein the threaded adjusting member is screwed into a screw portion on the pump case side. A small pump with an exhaust valve device as described is provided.

According to this configuration, the threaded adjustment member is rotated toward the exhaust valve by rotating the threaded adjustment member, and the exhaust valve is pressed and deformed by the threading of the threaded adjustment member. It is possible to adjust the exhaust speed by adjusting the opening amount.

  According to a sixth aspect of the present invention, the quick exhaust valve has a valve body that closes an opening through which air in the pressurized chamber is released, and receives the driving force of the motor to abut against the valve body. The small pump with an exhaust valve device according to claim 3, comprising a valve pressing body that forcibly releases the closing operation to open the opening.

  According to this configuration, the quick exhaust valve is opened and closed by using the driving force of the motor that drives the pump, the valve pressing body is operated by the driving force, and the valve pressing body is abutted against the peripheral surface of the valve body. Then, a quick exhaust valve capable of forcibly releasing the closing operation of the valve body to open the opening and exhausting the air in the pipe line through the opening can be obtained.

  According to a seventh aspect of the present invention, the valve pressing body includes a drive gear attached to a rotation drive 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. And the other end side of the oscillating lever is rotatably attached to the driven gear via a clutch portion. When the motor is rotated in one direction, the oscillating lever The driven gear is rotated in a direction away from the valve body, and when the driven gear is rotated in the opposite direction, the driven gear is rotated in a direction to make contact with the valve body and forcibly release the closing operation of the valve body. The small pump with an exhaust valve device according to claim 6 configured as described above is provided.

  According to this configuration, when the motor is rotated in one direction, the driven gear of the valve pressing body abuts on the peripheral surface of the valve body, forcibly releasing the closing operation of the valve body, and for quick exhaust. The opening can be opened. Further, when rotated in the opposite direction, the valve pressing body can be separated from the valve body of the quick exhaust valve, and the valve body can be returned to the closed operation state.

  In the invention according to claim 8, air is sent into the cuff by a small pump to pressurize the cuff to a predetermined pressure, and the air in the cuff is released by a constant speed exhaust valve to gradually increase the pressure in the cuff. A sphygmomanometer that measures the systolic blood pressure and the systolic blood pressure by lowering the squeeze pressure to the sphygmomanometer is arranged as a small pump with an exhaust device in the cuff. A sphygmomanometer configured as a small pump with an exhaust valve device is provided.

  According to this configuration, a sphygmomanometer using the small pump with an exhaust valve device according to claim 1, 2, 3, 4, 5, 6 or 7 can be obtained.

  In the small pump with an exhaust valve device according to the first aspect of the present invention, since the exhaust valve is provided in the pump case, an exhaust valve device integrated with a pump having no external pipe is obtained. As a result, when assembling to the main body of another device, for example, a blood pressure monitor, the problem that the piping has been bent due to contact with other members and was difficult to assemble in the past has been eliminated. And there is an advantage that it can be performed reliably.

  According to a second aspect of the present invention, in addition to the effect of the first aspect of the invention, the small pump with the exhaust valve device releases the air in the pressurized chamber at a substantially constant speed to keep the pressure in the pressurized chamber substantially constant. There exists an advantage that the small pump with an exhaust valve apparatus which has the function which can be made to descend | fall at the speed of this is obtained.

  According to a third aspect of the present invention, in addition to the effect of the first aspect of the invention, the small pump with the exhaust valve device allows the air in the pressurized chamber to escape at a substantially constant speed so that the pressure in the pressurized chamber is substantially constant. Advantage of being able to obtain a small pump with an exhaust valve device having two valve functions, a function capable of lowering the pressure in the pressurized chamber and a function capable of linearly and rapidly lowering the pressure in the pressurized chamber There is.

  Since the small pump with the exhaust valve device according to claim 4 of the present invention also serves as a diaphragm for a part of the components constituting the exhaust valve, in addition to the effects of the invention according to claim 1, 2, or 3, There is an advantage that reduction, simplification of the structure, and reduction in size and weight are possible.

  In the small pump with an exhaust valve device according to claim 5 of the present invention, the exhaust valve is pressed and deformed by the threaded adjustment member by turning the threaded adjustment member, and the opening amount of the slit is determined by the deformation amount of the exhaust valve. There is an advantage that the exhaust speed can be adjusted quickly and easily with high accuracy by adjusting the above.

  The small pump with an exhaust valve device according to claim 6 of the present invention uses a driving force of a motor for driving the pump to open and close the quick exhaust valve, and operates the valve pressing body with the driving force. Therefore, it is possible to eliminate the parts such as the plunger which have been used in the conventional apparatus and have been heavy and caused the increase in size. Therefore, in addition to the effect of the invention of claim 3, 4 or 5, there is an advantage that the cost can be reduced and the size and weight can be further reduced.

  Since the small pump with the exhaust valve device according to the seventh aspect of the present invention can control the opening / closing operation of the rapid exhaust valve according to the rotation direction of the motor, in addition to the effect of the invention according to the sixth aspect, the quick exhaust There is an advantage that the switching operation of the valve is simplified.

  The sphygmomanometer according to claim 8 of the present invention is small and lightweight by using a small pump with an exhaust valve device having the effect of the invention according to claim 1, 2, 3, 4, 5, 6 or 7. There is an advantage that a blood pressure monitor that is easy to assemble can be obtained.

  In order to achieve the purpose of reducing the number of parts, simplifying and downsizing the structure, and obtaining a structure that can be easily assembled to other equipment, an exhaust valve is provided in the pump case, and a small size with an exhaust valve device is provided. A pump was used.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of a small pump with an exhaust valve device according to the present invention. In the following description, the small pump with an exhaust valve device of the present invention will be described as an example when used in a sphygmomanometer, but the small pump with an exhaust valve device is not limited to the use of a sphygmomanometer. .

  In FIG. 1, a small pump 10 with an exhaust valve device has a structure in which a constant speed exhaust valve 12 and a quick exhaust valve 13 are provided in a small pump portion 11.

  The small pump part 11 is provided with a diaphragm body 16 having two diaphragm parts 16a and 16a that form 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. Note that a flexible tube 47 that leads to a cuff (not shown) is tightly connected to the exhaust hole 29.

  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 detailed structure of the constant speed exhaust valve 12 is also shown in FIGS. 2 is a partially enlarged view of the constant speed exhaust valve, and FIG. 3 is an exploded perspective view of the constant speed exhaust valve. 2 and FIG. 3, the constant-speed exhaust valve 12 is provided corresponding to the annular concave groove 30 that communicates with the cuff through the exhaust hole 29, and is formed in a part of the diaphragm body 16. And a screwed adjustment member 12b attached to the cylindrical hollow cylindrical portion 36 of the middle case 14b for adjusting the exhaust amount of the valve body 12a.

  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 annular groove 30 and the upper end of the valve body 12a is closed. It arrange | positions in the state which 61 was made to contact | abut to the inner lower surface 30b of the annular groove 30. FIG. In addition, a slit 35 leading to the inside is formed on the peripheral surface of the valve body 12a along the length direction of the valve body 12a (the vertical direction in FIGS. 1 and 2).

  The threaded adjustment member 12b is a screw body provided on the outer periphery with a screw portion 62a which is a hollow inner surface of the hollow cylindrical portion 36 in the middle case 14b and is screwed into a screw hole 36a of the hollow cylindrical portion 36. The pressing portion 62b having an outer diameter larger than the inner diameter of the lower end opening 61a of the valve body 12a is integrally formed at the tip. Further, an engagement groove 62c into which a tip of a tool, for example, a driver is inserted at the time of adjustment is provided on the base end side of the screw adjusting member 12b, and a through hole 62d penetrating over the front and rear ends is provided at the center. Is formed. When the screwed adjusting member 12b is rotated clockwise, for example, by engaging the tip of the driver with the engaging groove 62c, the screwed adjusting member 12b is engaged with the screw hole 36a and the screw portion 62a. Moves to the upper side, i.e., the valve body 12a, and conversely, when turned counterclockwise, the threaded adjustment member 12b moves to the lower side, i.e., away from the valve body 12a.

  The constant-speed exhaust valve 12 configured as described above is configured such that when the threaded adjustment member 12b is rotated to the right, for example, and the threaded adjustment member 12b is moved toward the valve body 12a, the pressing portion 62b is moved to the valve body. It contacts the peripheral edge of the lower end opening 61a of 12a. The state shown by the solid line in FIG. 2 shows a state in which the pressing portion 62b is lightly abutted on the periphery of the lower end opening 61a of the valve body 12a. Further, when the threaded adjustment member 12b is further rotated to move the threaded adjustment member 12b toward the valve body 12a, the pressing portion of the threaded adjustment member 12b is placed in the inner peripheral surface 12c of the valve body 12a. 62b is inserted, and as shown by a two-dot chain line in FIG. 2, the valve body 12a is expanded by being deformed, and the slit 35 can be opened along with this deformation. Note that the air passing through the opening is exhausted through the through hole 62d of the threaded adjustment member 12b. Therefore, the opening amount of the slit 35 can be adjusted by the deformation amount of the valve body 12a according to the moving amount of the screw adjusting member 12b, and the air inside the cuff is released by the constant speed exhaust valve 12 by the adjustment, The speed at which the pressure inside the cuff is gradually lowered can be adjusted. This adjustment is an adjustment at the time of assembly, and is usually not performed after assembly except for maintenance and inspection.

  FIG. 4 also shows the detailed structure of the quick exhaust valve 13. In addition to FIG. 4, 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, similar to the constant speed exhaust valve 12. An exhaust port 37 having an exhaust hole 37a in the center formed in a part of the diaphragm body 16, a valve body 13a for opening and closing the exhaust hole 37a of the exhaust port 37, and a valve pressing body for operating the valve body 13a 13b. The middle case 14b is provided with a notch 60 for allowing the exhaust port 37 to escape, corresponding to the location where the exhaust port 37 is formed. Therefore, the exhaust port portion 37 is exposed to the lower surface side of the middle case 14 b through the cutout portion 36 of the middle case 14 b, and the exhaust hole 37 a is opened in the pump case 14.

  The valve body 13a is formed of a resin material in a rectangular parallelepiped shape, the upper surface is a smooth surface, and the abutting tooth portion 38 and the spring accommodating notch portion 54 are formed at positions displaced from each other by 180 degrees on the side surface. On the inner surface of the spring housing cutout portion 54, a spring latching portion 50 projects downward. Further, a hinge 51 is provided at a corner portion where the abutting tooth portion 38 and the side surface where the spring accommodating notch 54 is provided and the upper surface intersect with each other. In the pump case 14, the valve body 13 a is made to correspond to the lower surface of the exhaust port portion 37 and the upper surface of the valve body 13 a, and the tip of the spring latching portion 50 is opposed to the inner surface of the lower case 14 c. The lower case 14c is attached via a hinge 51.

  Accordingly, the valve body 13a can be rotated in the vertical direction with the hinge 51 as a fulcrum. When the valve body 13a is rotated upward, the upper surface abuts the lower surface of the exhaust port portion 37 to close the exhaust hole 37a. When the entire valve body 13a is tilted by being rotated in the direction, the upper surface is separated from the lower surface of the exhaust port portion 37 to open the exhaust hole 37a. The position of the valve body 13a indicated by a solid line in FIG. 1 is a state in which the upper surface of the valve body 13a abuts the lower surface of the exhaust port portion 37 to close the exhaust hole 37a. " On the other hand, the position of the valve body 13a indicated by a two-dot chain line in FIG. 1 is inclined when the valve body 13a is rotated downward, and the upper surface of the valve body 13a is greatly separated from the lower surface of the exhaust port portion 37. 37a is opened, and this position is hereinafter referred to as “valve open position”.

  Further, between the lower surface of the valve body 13a and the bottom surface of the lower case 14c, one end is hooked on the spring latching portion 50 of the valve body 13a and the spring latching portion 53 of the lower case 14c, respectively, and the coil spring 52 is engaged. Is attached in a compressed form. Therefore, the valve body 13a is always urged in the valve closing position direction, and is normally brought into contact with the lower surface of the exhaust port portion 37 to close the exhaust hole 37a.

  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. 4).

  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. 4) together with the rotary drive shaft 26 by the forward rotation of the motor 25, the driven gear 43 is also moved in the forward direction (FIG. 4). It is rotated in the direction of arrow a). At this time, clutch friction is generated between the driven gear 43 and the swing lever 41 by the pressing of the coil spring 44. Therefore, the swing lever 41 has the bearing 40 as a fulcrum 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.

  On the contrary, when the motor 25 is rotated in the reverse direction, the drive gear 27 is rotated in the reverse direction (arrow B in FIG. 4) together with the rotary drive shaft 26, and the driven gear 43 is also rotated in the reverse direction (arrow b in FIG. 4). Direction). At this time, clutch friction is generated between the driven gear 43 and the swing lever 41 by the pressing of the coil spring 44. Therefore, the swing lever 41 has the bearing portion 40 as a fulcrum in the direction of arrow O in FIG. Further, the swing lever 41 rotates until the stopper 45L abuts. When the swing lever 41 abuts against the stopper 45L to restrict the rotation, the portion frictionally coupled as a clutch with the swing lever 41 (clutch portion) slips, and only the driven gear 43 is driven while idling. Continue to rotate with the gear 27.

  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. When the driven gear 43 collides with the abutting tooth portion 38, the valve body 13a applies a force (force in the direction indicated by arrow G in FIG. 4) to rotate downward with the hinge 51 as a fulcrum. It is received from the side, and rotates downward, that is, toward the valve opening position against the urging force of the coil spring 52.

  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 restricted by the stopper 45 </ b> R together with the driven gear 43, the valve body 13 a is in the valve closed position. Has been moved to.

  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, a force for pushing the abutting tooth portion 38 outward from the driven gear 43 side, that is, a force indicated by an arrow G in FIG. As a result, the entire valve body 13a is rotated from the valve closing position to the valve opening position with the hinge 51 as a fulcrum, and the exhaust hole 37a is opened by this inclination. The air in the annular groove 30 through the exhaust hole 37a, That is, the air in the cuff can be rapidly and linearly extracted with time.

  Next, the operation of the small pump 10 with the exhaust valve device 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 valve body 13a receives a force in the direction of arrow H in FIG. 4 by the urging force of the coil spring 44, is rotated upward with the hinge 51 as a fulcrum, and is disposed at the valve closed position. The exhaust port 37a is abutted against the lower surface of the exhaust port 37 to close the exhaust hole 37a, 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 that is larger than the exhaust amount by the constant speed exhaust valve 12 proceeds simultaneously with this. The 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 against the abutting tooth portion 38 of the valve body 13a, and applies a pressing force in the direction of arrow G in FIG. The hinge 51 is rotated as a fulcrum. The exhaust hole 37a of the exhaust port portion 37 is greatly opened by the inclination due to the rotation, and the air in the annular groove 30, that is, the air in the cuff is rapidly and linearly extracted with time through the exhaust hole 37a.

  Therefore, according to the small pump 10 with the exhaust valve device of the present embodiment configured as described above, exhaust valves (constant speed exhaust valve 12 and quick exhaust valve 13) are provided in the pump case 14, and Since the small pump unit 11 is integrated, a structure of a small pump with an exhaust valve device that does not have piping outside is obtained. As a result, when assembling to other equipment (blood pressure monitor in the case of the present embodiment), there has been a problem that the piping is bent in contact with other members in the past, and the assembling work is difficult. The small pump 10 with the exhaust valve device is advantageous in that this problem can be eliminated and the assembly work to the device body can be performed quickly and reliably.

  Since two pumps, the constant speed exhaust valve 12 and the quick exhaust valve 13, are built in one pump case 14, the pump case 14 has both the function of the constant speed exhaust valve and the function of the quick exhaust valve. A small pump with an exhaust valve device is obtained.

  Further, since the diaphragm body 16 also serves as a part of the parts constituting the exhaust valves (constant speed exhaust valve 12 and quick exhaust valve 13), the number of parts can be reduced, the structure can be simplified, and the size and weight can be reduced. .

  Further, on the constant speed exhaust valve 12 side, the valve body 12a is pressed and deformed by turning the screw adjusting member 12b, and the opening amount of the slit 35 can be adjusted by the deformation amount of the valve body 12a. The exhaust speed by the valve 12 can be adjusted quickly and easily.

  Further, on the quick exhaust valve 13 side, the opening / closing operation of the quick exhaust valve 13 can be controlled according to the rotation direction of the motor 25, so that the opening / closing switching operation of the quick exhaust valve 13 can be simplified.

  Therefore, when the small pump 10 with the exhaust valve device configured as described above is used for a sphygmomanometer, a sphygmomanometer that is small in size and easy to assemble can be obtained.

  In the structure of this embodiment, the case where two diaphragm portions 16a are provided has been described. However, one or more diaphragm portions 16a can be provided.

  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 small pump with an exhaust valve apparatus which concerns on the Example of this invention. The principal part expanded sectional view in a present Example apparatus. The disassembled perspective view of the constant speed exhaust valve in a present Example apparatus. The principal part enlarged plan view of the quick exhaust valve in a present Example apparatus. The longitudinal cross-sectional view of the conventional small pump with an exhaust valve apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Small pump with exhaust valve apparatus 11 Small pump part 12 Constant speed exhaust valve 12a Valve body 12b Adjusting member with screw 13 Quick exhaust valve 13a Valve body 13b Valve press body 14 Pump case 15 Pump chamber 16 Diaphragm body 16a Diaphragm part 18 Oscillator 25 Motor 29 Exhaust hole 35 Slit 37 Exhaust port part 37a Exhaust hole 38 Colliding tooth part
39 Center through hole 41 Oscillating lever 44 Coil spring

Claims (8)

A pump case having a diaphragm that forms a pump chamber that communicates with the pressurized chamber, and operates the diaphragm to suck air into the pump chamber, and exhausts the air in the pump chamber into the pressurized chamber. A small pump with an exhaust valve device having a motor case with a motor mounted therein and an exhaust valve for releasing the air exhausted from the pump chamber to the pressurized chamber and reducing the pressure in the pressurized chamber In
A small pump with an exhaust valve device, wherein the exhaust valve is provided in the pump case.   2. The exhaust valve according to claim 1, wherein the exhaust valve is a constant-speed exhaust valve that releases air in the pressurized chamber at a substantially constant speed and lowers the pressure in the pressurized chamber at a substantially constant speed. Small pump with exhaust valve device.   The exhaust valve has a constant-speed exhaust valve that releases air in the pressurized chamber at a substantially constant speed and lowers the pressure in the pressurized chamber at a substantially constant speed, and a linear pressure for the pressure in the pressurized chamber. 2. A small pump with an exhaust valve device according to claim 1, characterized in that it comprises a quick exhaust valve that descends rapidly.   4. The small pump with an exhaust valve device according to claim 1, wherein the exhaust valve is formed integrally with the diaphragm.   The exhaust valve is deformed by pressing a tube-shaped exhaust valve body having one end closed with a slit on the peripheral surface, and adjusting the opening amount of the slit by the deformation. 5. A screw-adjusting member capable of adjusting a speed, wherein the screw-adjusting member is screwed into a screw portion on the pump case side. Small pump with exhaust valve device.   The quick exhaust valve has a valve body that closes an opening through which air in the pressurized chamber escapes, and receives the driving force of the motor to collide with the valve body to forcibly release the closing operation of the valve body. 6. The small pump with an exhaust valve device according to claim 3, wherein the pump is configured with a valve pressing body that opens the opening. The valve pressing body includes a drive gear attached to a rotational drive shaft of the motor so as to be integrally rotatable, a driven gear rotatable integrally with the drive gear, one end side pivoting about the drive gear, It is composed of a swing lever on which the driven gear is rotatably attached to the end side via a clutch portion,
When the motor is rotated in one direction, the swing lever is rotated in a direction away from the valve body, and when the motor is rotated in the opposite direction, the driven gear abuts the valve body. 7. The small pump with an exhaust valve device according to claim 6, wherein the small pump is configured to be rotated in a direction for forcibly releasing the closing operation of the valve body. Air is sent into the cuff by a small pump to pressurize the cuff to a predetermined pressure, and the air in the cuff is released by a constant speed exhaust valve to gradually lower the pressure in the cuff, thereby increasing the maximum blood pressure and the minimum pressure. In a sphygmomanometer that measures blood pressure,
What is arrange | positioned in the blood pressure meter main body as a small pump with the exhaust valve apparatus in the said cuff is comprised as a small pump with the exhaust valve apparatus of Claim 1, 2, 3, 4, 5, 6 or 7 Blood pressure monitor characterized by.