WO2015005123A1 - 電磁弁およびそれを備えた電子血圧計 - Google Patents

電磁弁およびそれを備えた電子血圧計 Download PDF

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Publication number
WO2015005123A1
WO2015005123A1 PCT/JP2014/067002 JP2014067002W WO2015005123A1 WO 2015005123 A1 WO2015005123 A1 WO 2015005123A1 JP 2014067002 W JP2014067002 W JP 2014067002W WO 2015005123 A1 WO2015005123 A1 WO 2015005123A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
casing
solenoid valve
bobbin
cuff
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/067002
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
佐野　佳彦
岳 長谷川
佐藤　博則
広幸 木下
小椋　敏彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omron Healthcare Co Ltd
Original Assignee
Omron Healthcare Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omron Healthcare Co Ltd filed Critical Omron Healthcare Co Ltd
Priority to DE112014003211.5T priority Critical patent/DE112014003211B4/de
Priority to CN201480038816.1A priority patent/CN105358050B/zh
Publication of WO2015005123A1 publication Critical patent/WO2015005123A1/ja
Priority to US14/991,647 priority patent/US10080502B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
    • A61B5/0235—Valves specially adapted therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/048—Electromagnetically actuated valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor

Definitions

  • the present invention relates to a solenoid valve, and more particularly to a solenoid valve that opens and closes by moving a plunger (movable iron core) by the magnetic force of a solenoid coil.
  • the present invention also relates to an electronic sphygmomanometer having such a solenoid valve.
  • the solenoid valve includes a U-shaped yoke and a fixed cover that is pressed and fixed so as to close the open end of the yoke.
  • a bobbin and a solenoid coil wound around the bobbin are accommodated therein.
  • a rod-shaped plunger movable iron core
  • a core bottom gutter
  • a cushioning material as a valve body is attached to one end of the plunger, and the cushioning material faces the flow port of the core.
  • the solenoid coil When the solenoid coil is in a non-energized state, the cushioning material attached to one end of the plunger is separated from the flow port by the urging force of the compression spring.
  • the solenoid coil When the solenoid coil is energized, the buffer material is moved in the bobbin together with the plunger against the urging force of the compression spring by the magnetic force generated by the solenoid coil. Thereby, the flow volume of the fluid which distribute
  • the other end opposite to the one end of the plunger protrudes outside from the fixed cover through a through hole.
  • the other end is covered with a U-shaped convex cover extending from the bobbin to the outside through the through hole.
  • this type of solenoid valve may require different flow characteristics depending on the application. Further, when dust or the like is clogged between the core outlet and the valve body (buffer material) during use, it is necessary to disassemble and perform maintenance.
  • an object of the present invention is to provide an electromagnetic valve in which the plunger and the valve body can be easily replaced, and thus various flow characteristics can be easily realized without changing the entire electromagnetic valve, and the internal maintenance is easy. There is to do.
  • Another object of the present invention is to provide an electronic sphygmomanometer having such a solenoid valve.
  • the solenoid valve of the present invention is A solenoid valve capable of variably controlling the flow rate of fluid, A casing, A bobbin housed in the casing and a solenoid coil wound around the bobbin; A rod-like plunger slidably inserted in the bobbin; A core provided with a flow port through which a fluid flows, wherein one end of the plunger of the casing is arranged on the opposite side; A valve body provided at the one end of the plunger and disposed to face the flow port; A biasing portion that biases the plunger in a direction away from the core; When the solenoid coil is in a non-energized state, the valve body provided at the one end of the plunger is separated from the flow port by the urging force of the urging portion and is opposite to the one end of the plunger.
  • the other end of the side protrudes to the outside through the through hole from the casing and comes into contact with and is locked to a locking portion arranged outside the casing,
  • the solenoid coil When the solenoid coil is in an energized state, the valve body is moved in the bobbin together with the plunger against the urging force of the urging portion by the magnetic force generated by the solenoid coil.
  • the flow rate of fluid flowing through is adjusted,
  • the locking portion can be elastically deformed by an external force so as to allow the plunger and the valve body to be detached from the casing.
  • external force means a force received from an external element other than the constituent elements of the solenoid valve.
  • the solenoid valve of the present invention is used in the following manner. That is, when the solenoid coil is in a non-energized state, the valve body provided at the one end of the plunger is separated from the flow port by the biasing force of the biasing portion, and the one end of the plunger is The other end on the opposite side protrudes from the casing through the through-hole and abuts and is engaged with an engaging portion disposed outside the casing (the state of the engaging portion is referred to as a “closed state”). .) When the solenoid coil is in an energized state, the valve body is moved in the bobbin together with the plunger against the urging force of the urging portion by the magnetic force generated by the solenoid coil. The flow rate of fluid flowing through is adjusted.
  • the locking part When it is necessary to disassemble to achieve various flow characteristics, etc., when the solenoid coil is not energized, the locking part is elastically deformed by an external force and passes through the plunger. To a state that can be made (this is referred to as an “open state”).
  • the plunger and the valve body are separated from the casing (that is, the bobbin) through the locking portion in the open state. Instead, a new plunger having a valve body provided at one end is placed inside the casing through the locking portion in the opened state and the through hole in such a direction that the valve body faces the flow port of the core. To be precise, it is inserted into the bobbin).
  • the locking portion returns to its original shape and enters a closed state in which passage of the newly inserted plunger is prohibited. That is, at the time of non-operation, the other end of the newly inserted plunger (the end opposite to the one end provided with the valve body) protrudes from the casing to the outside through the through hole and contacts the locking portion. Locked in contact.
  • the plunger and the valve body can be easily exchanged. Therefore, various different flow characteristics can be easily realized without changing the entire solenoid valve. Also, internal maintenance can be easily performed.
  • the external force on the locking part is once removed, and the locking part is elastically deformed by the external force again immediately before inserting a new plunger and valve body. It may be in an open state.
  • the bobbin A body portion housed in the casing; A first extending portion that is integrally formed with the main body portion and extends to the outside of the casing through the through hole;
  • This 1st extension part comprises the said latching
  • the locking portion is formed of the first extending portion of the bobbin, that is, a portion integrally formed with the main body portion and extending to the outside of the casing through the through hole. . Therefore, it is not necessary to bother to increase the number of parts in order to provide the locking portion. As a result, an increase in the manufacturing cost of the solenoid valve can be avoided.
  • the locking part is An arm portion that extends to the outside of the casing along the movement path of the plunger through the through-hole, and the tip side can be bent in a direction away from the movement path of the plunger by the external force; A claw portion that extends substantially vertically from the tip of the arm portion toward the movement path of the plunger, and the tip is interrupted, The claw portion locks the other end of the plunger when the actuator is not operated.
  • the “movement path” of the plunger means a movement path along the longitudinal direction of the plunger, and includes not only a path along which the plunger moves during operation, but also a path when the plunger moves away from the casing. Including.
  • the locking portion has an arm portion and a claw portion.
  • the other end of the plunger (the end protruding to the outside from the casing through the through hole) is locked by the claw portion.
  • the arm portion is bent in a direction away from the movement path of the plunger as elastic deformation by the external force.
  • the claw part is removed from the movement path of the plunger, and the locking part is opened. Thereby, the plunger and the valve body can be detached from the casing (that is, the bobbin) through the locking portion in the open state.
  • the arm portion and the claw portion are It returns to its original shape and position and becomes closed. That is, at the time of non-operation, the other end of the new plunger protrudes from the casing through the through-hole and comes into contact with the claw portion to be locked.
  • a U-shaped convex cover extends from the bobbin main body to the outside through the through hole in order to lock the plunger.
  • the convex cover and the bobbin main body are integrally formed of a plastic material having a certain degree of mechanical strength (difficult to deform).
  • the reason why a certain degree of mechanical strength is given to the bobbin body and the convex cover is to stabilize the position of the solenoid coil relative to the casing (yoke and fixed cover) in order to stabilize the shape of the solenoid coil wound around the bobbin body. Further, this is because the plunger is securely locked by the convex cover. For this reason, it is difficult for the U-shaped convex cover to be opened by elastic deformation.
  • the through hole includes a main region having a shape substantially corresponding to a cross section of the plunger, and an extension region extended to pass through the arm portion connected to the main region, A gap is provided between the arm portion and the surface of the extension region facing the arm portion at least in the direction in which the arm portion moves away from the movement path of the plunger.
  • a gap is provided between the arm portion and the surface of the expansion region facing the arm portion at least in the direction in which the arm portion moves away from the movement path of the plunger. Therefore, as the elastic deformation due to the external force, when the arm portion is bent in a direction away from the movement path of the plunger, the arm portion is opposed to the arm portion in the expansion region from the base connected to the main body portion of the bobbin. Without being hit by the surface to be bent, it is easily bent in a manner that narrows the gap. Therefore, the locking portion can be opened by a smaller external force. As a result, it is possible to prevent a situation in which the arm portion is broken when the locking portion is deformed to open.
  • a taper surface that opens toward the outside of the casing is provided on the side of the claw portion that is opposite to the side that contacts the plunger.
  • the locking portion is in a closed state.
  • a tapered surface that opens toward the outside of the casing is provided on the side of the claw portion that is opposite to the side that contacts the plunger. Therefore, if an attempt is made to insert the new plunger from the outside of the casing into the inside along the movement path, first, an edge of one end of the new plunger (an end portion on which the valve body is provided) is the claw. It abuts on the tapered surface of the part.
  • locking part receives the force which bends the said arm part in the direction away from the movement path
  • the arm portion bends away from the movement path of the plunger, the claw portion comes off from the movement path of the plunger, and the locking portion becomes open.
  • the claw portion comes into contact with the outer peripheral surface of the new plunger, and the arm portion is bent from the outer peripheral surface in a direction away from the movement path of the plunger. Get ready for power. Therefore, the locking part maintains an open state.
  • the said new plunger and valve body are inserted in the said casing through the said latching
  • the locking portion returns to the original shape, and a closed state in which passage of the newly inserted plunger is prohibited.
  • locking part receives an external force from the new plunger pushed in, and will be in an open state. Therefore, it is not necessary to apply a separate external force to the locking portion, which is convenient.
  • the locking portion includes a plurality of sets including the arm portion and the claw portion.
  • the locking portion has a plurality of sets including the arm portion and the claw portion. Accordingly, the strength of locking the other end of the plunger is increased when the plunger is not operated. Further, even if one arm part is broken during the deformation to make the locking part open, the remaining arm part and the claw part may cause The other end of the plunger can be locked.
  • the casing has a U-shaped yoke and a plate-shaped yoke lid that closes the open end of the yoke, and the through-hole is formed in the yoke lid.
  • the bobbin has a second extension part and a third extension part formed integrally with the main body part, The second extending portion and the third extending portion extend to the outside of the casing in parallel with the movement path of the plunger while being in contact with a pair of opposite sides of the yoke lid.
  • the bobbin has a second extending portion and a third extending portion that are formed integrally with the main body portion.
  • the second extending portion and the third extending portion extend to the outside of the casing in parallel with the movement path of the plunger while being in contact with a pair of opposite sides of the yoke lid. That is, the second extending portion and the third extending portion of the bobbin sandwich the yoke lid in the direction in which the pair of sides of the yoke lid are opposed to each other. Therefore, the bobbin (and thus the solenoid coil) and the yoke lid are positioned relative to each other in the direction in which the pair of sides of the yoke lid are opposed to each other. As a result, during the operation, the magnetic flux passing through the yoke, the yoke lid, the plunger, and the core is stabilized, and the accuracy of adjusting the flow rate of the fluid is increased.
  • the direction in which the pair of sides of the yoke lid opposes substantially coincides with the direction in which the locking portion receives the external force around the movement path of the plunger.
  • the “direction in which the locking portion receives the external force” means an orientation in a plane perpendicular to the movement path of the plunger.
  • the direction in which the pair of sides of the yoke lid opposes substantially coincides with the direction in which the locking portion receives the external force around the movement path of the plunger. Therefore, even if the locking portion receives the external force, the bobbin (and thus the solenoid coil) and the yoke lid are positioned relative to each other in the direction of receiving the external force. Therefore, even if the plunger and the valve body are replaced, a problem that the bobbin (and thus the solenoid coil) and the yoke lid are displaced due to the external force is prevented. As a result, the accuracy of the fluid flow rate adjustment during the operation is maintained.
  • the electronic blood pressure monitor of the present invention is An electronic sphygmomanometer that measures the blood pressure of a measurement site, A cuff attached to the measurement site; A pump for supplying air to the cuff; The solenoid valve; And a controller that controls the pressure of the cuff by supplying air to the cuff by the pump to pressurize the cuff and exhausting the air from the cuff through the electromagnetic valve to decompress the cuff.
  • the electronic sphygmomanometer of the present invention includes the above-described electromagnetic valve in order to control the pressure of the cuff. Therefore, in the electromagnetic valve, the plunger and the valve body can be easily exchanged. Therefore, various different flow characteristics can be easily realized without changing the entire solenoid valve. Further, maintenance inside the solenoid valve can be easily performed.
  • the plunger and the valve body can be easily replaced. Therefore, various different flow characteristics can be easily realized without changing the entire solenoid valve. Also, internal maintenance can be easily performed.
  • the plunger and the valve body can be easily replaced in the electromagnetic valve. Therefore, various different flow characteristics can be easily realized without changing the entire solenoid valve. Further, maintenance inside the solenoid valve can be easily performed.
  • FIG. 1 It is a perspective view which shows the external appearance of the solenoid valve of one Embodiment of this invention. It is a figure which shows the said solenoid valve in a decomposition
  • the said solenoid valve it is a figure which shows the aspect when removing a plunger and a valve body from a casing (or inserting).
  • the said solenoid valve it is a figure which shows the state which is going to insert the new plunger with which the valve body was provided in the end.
  • the said solenoid valve it is a figure which shows the state in the middle of inserting the new plunger with which the valve body was provided in the end.
  • FIG. 1 shows a perspective view of an external appearance of a solenoid valve (the whole is denoted by reference numeral 2) according to an embodiment of the present invention.
  • FIG. 2 shows the electromagnetic valve 2 in an exploded state.
  • XYZ orthogonal coordinates are also shown in FIGS. 1 and 2 and FIG. 3 described later.
  • the Z direction may be referred to as up and down or up and down
  • the Y direction may be referred to as left or right or left and right. It is not limited.
  • the electromagnetic valve 2 includes a U-shaped yoke 3, a core 4 attached through the wall of the yoke 3, a coil spring 5 as an urging portion, and a rod-like shape.
  • the yoke 3 includes a central side wall 3c and side walls 3a and 3b on both sides connected to the central side wall 3c, and has a substantially U-shape as a whole. Recesses 3e and 3f to which the protrusions 90e and 90f of the yoke lid 90 are to be fitted are formed at the tips (open ends) of the side walls 3a and 3b. A through hole 3w (see, for example, FIG. 4) is formed in the central side wall 3c. The core 4 is fitted and fixed in the through hole 3w.
  • the core 4 has a substantially cylindrical shape as a whole.
  • the core 4 has, in the axial direction (X direction), a projection 4a that fits into the through hole 3w of the yoke 3 and protrudes to the outside, and a main portion 4b that has an outer diameter larger than the outer diameter of the projection 4a.
  • a spring receiving portion 4c having an outer diameter smaller than the outer diameter of the main portion 4b.
  • a circulation port 4 d is formed to penetrate the fluid from the protrusion 4 a to the opposite end 4 e in the axial direction.
  • the plunger 6 has a substantially round bar shape as a whole.
  • the plunger 6 has a spring receiving portion 6a having the same outer diameter as the spring receiving portion 4c of the core 4 and a main diameter having the same outer diameter as that of the main portion 4b of the core 4 in the axial direction (X direction).
  • the unit 6b is provided in order.
  • a valve body 61 made of an elastic body such as rubber is attached to one end (end portion of the core 4 facing the flow port 4d) 6e.
  • a depression 6c (see, for example, FIG. 4) is provided at one end 6e of the plunger 6, and a valve body 61 is fitted into the depression 6c.
  • the coil spring 5 has a shape extending spirally in one direction (X direction).
  • the coil spring 5 has an inner diameter substantially equal to the outer diameter of the spring receiving portion 4 c of the core 4 and the spring receiving portion 6 a of the plunger 6, and the main portion 4 b of the core 4 and the main portion of the plunger 6. It has an outer diameter substantially equal to the outer diameter of 6b.
  • the coil spring 5 is fitted into the two spring receiving portions 4c and 6a and is compressed between the two main portions 4b and 6b so as to urge the plunger 6 in a direction away from the core 4. (See, for example, FIG. 4).
  • the coil unit 7 includes a bobbin 8 made of a nonmagnetic plastic material and a solenoid coil 9 wound around the bobbin 8.
  • the configuration of the coil unit 7, particularly the bobbin 8, will be described in detail later.
  • the yoke lid 90 has a substantially rectangular plate shape corresponding to the open end of the yoke 3. A pair of sides 90a and 90b facing the upper and lower sides (Z direction) of the yoke lid 90 are formed flat. On the other hand, projections 90e and 90f to be fitted into the recesses 3e and 3f of the yoke 3 are formed on a pair of sides facing the left and right (Y direction). A substantially circular through hole 90 m is formed in the center of the yoke lid 90.
  • the through-hole 90 m has a substantially circular shape substantially corresponding to the cross section of the plunger 6.
  • extended regions 90p and 90q extended to pass the locking portions 84 and 85 (particularly, arm portions 84a and 85a described later) of the bobbin 8 are formed.
  • the diameter of the through hole 90m (portion other than the expansion regions 90p and 90q) is set to be substantially equal to the outer diameter of the main portion 6b of the plunger 6.
  • the bobbin 8 includes a cylindrical main portion 81 and one end ( ⁇ X side end) and the other end (+ X side end) with respect to the axial direction (X direction) of the main portion 81. And plate-like end plates 82 and 83 provided on the plate. These end plates 82 and 83 are each arranged perpendicular to the central axis of the main portion 81.
  • the solenoid coil 9 is wound around the outer peripheral surface 81 a of the main portion 81 between the end plates 82 and 83.
  • the main portion 81 and the end plates 82 and 83 constitute a main body portion of the bobbin 8 (accommodated in a casing formed by the yoke 3 and the yoke lid 90 in the completed state shown in FIG. 1).
  • the main part 81 has a substantially circular through hole 81b extending in the axial direction (X direction) therein.
  • This through hole 81b several extended regions 81d, 81d,... Extended to allow fluid to flow are formed.
  • the extended regions 81d, 81d,... are formed at regular angular intervals with respect to the circumferential direction of the through-hole 81b, and each extend in the X direction.
  • the diameter of the through hole 81b (portion other than the expansion regions 81d, 81d,...) Has an outer diameter substantially equal to the outer diameter of the plunger 6 so that the plunger 6 can slide.
  • the + X side end plate 83 includes locking portions 84 and 85 as first extending portions extending or projecting toward the + X side, protrusions 86A and 86B as second extending portions, and third extending portions, respectively. It has a projection 87 as a part and terminal covers 88A and 88B.
  • the bobbin 8 is integrally formed using a nonmagnetic plastic material together with these elements 84, 85, 86A, 86B, 87, 88A, and 88B. Therefore, in order to provide these elements 84, 85, 86A, 86B, 87, 88A, 88B, it is not necessary to bother to increase the number of parts. As a result, an increase in the manufacturing cost of the solenoid valve 2 can be avoided.
  • the locking portion 84 has an arm portion 84a extending to the + X side from a position immediately adjacent to the through hole 81b in the surface on the + X side of the end plate 83, and substantially perpendicular to the tip of the arm portion 84a.
  • a claw portion 84b extending to the Z side and having a broken tip.
  • the locking portion 85 is symmetrical with the locking portion 84 in the vertical direction, and an arm portion 85a extending from the position adjacent to the bottom of the through hole 81b to the + X side within the + X side surface of the end plate 83, and this arm
  • a claw portion 85b extending from the tip of the portion 85a substantially vertically to the + Z side and having a broken tip.
  • the arm portion 84a of the locking portion 84 can be bent toward the + Z side by an external force at the distal end side.
  • the arm portion 85a of the locking portion 85 can be bent toward the ⁇ Z side by an external force on the tip side.
  • taper surfaces 84c and 85c that open toward the outside (+ X direction) are provided on the side (+ X side) opposite to the side that contacts the plunger 6 of the claw portions 84b and 85b. These tapered surfaces 84c and 85c are curved in an arc shape along the circumferential direction of the through hole 81b.
  • the protrusions 86A and 86B are arranged on the left and right (Y direction) along the upper edge of the end plate 83, and each extend to the + X side.
  • the protrusion 87 is arranged at the center of the left and right (Y direction) below the end plate 83 and extends to the + X side.
  • the distance in the vertical direction (Z direction) between the protrusions 86A and 86B and the protrusion 87 is substantially equal to the vertical dimension of the yoke lid 90 (the distance between the pair of vertically opposed sides 90a and 90b). I'm doing it.
  • the yoke lid 90 is fitted between the projections 86A and 86B and the projection 87 in a state where the through-hole 81b of the bobbin 8 and the through-hole 90m of the yoke lid 90 are aligned.
  • the terminal covers 88A and 88B are arranged on the left and right (Y direction) along the lower edge of the end plate 83, and extend to the + X side.
  • the height (Z direction position) of the terminal covers 88A and 88B in the + X side surface of the end plate 83 is set slightly lower than the height of the protrusion 87, but is the same as the height of the protrusion 87. It may be.
  • the lead holes 88b and 88b of the terminal covers 88A and 88B are respectively connected to lead terminals 89A and 89B (see FIG. 1).
  • the assembly of the solenoid valve 2 is performed by collecting the elements in FIG. 2 with respect to the X direction.
  • one end ( ⁇ X side end portion) of the coil spring 5 is fitted into the spring receiving portion 4 c of the core 4 attached to the yoke 3.
  • the plunger 6 is accommodated in the through hole 81b of the bobbin 8 of the coil unit 7 (the solenoid coil 9 is wound in advance).
  • the bobbin 8 in this state is accommodated in the yoke 3, and the spring receiving portion 6 a of the plunger 6 is fitted to the other end (+ X side end portion) of the coil spring 5.
  • the yoke lid 90 is brought close to the end plate 83 of the bobbin 8, and the locking portions 84 and 85 of the end plate 83 are passed through the through holes 90m (more precisely, the expansion regions 90p and 90q) of the yoke lid 90.
  • the yoke lid 90 is fitted between the protrusions 86 A and 86 B of the end plate 83 and the protrusion 87.
  • the projections 90e and 90f of the yoke lid 90 are fitted into the recesses 3e and 3f at the open end of the yoke 3, respectively.
  • the yoke lid 90 is fixed to the yoke 3 by caulking. Thereby, the electromagnetic valve 2 shown in FIG. 1 is completed.
  • the yoke 3, the core 4, the plunger 6, and the yoke lid 90 are made of a magnetic material, and can constitute a magnetic circuit during operation.
  • the yoke 3 and the yoke lid 90 are made of cold-rolled steel plates having mechanical strength, and constitute a casing of the electromagnetic valve 2 (hereinafter, referred to as “casing 3, 90” as appropriate).
  • FIG. 4 schematically shows a cross section parallel to the ZX plane in FIGS. 1 to 3 of the completed solenoid valve 2 (when not operated) (the same applies to FIGS. 5 to 9 described later).
  • the flow port 4d of the core 4 and the valve body 61 attached to the one end 6e of the plunger 6 face each other.
  • the core 4 is fixed with respect to the yoke 3 and is therefore stationary with respect to the main part 81 of the bobbin 8.
  • the plunger 6 is slidable in the axial direction within the main portion 81 of the bobbin 8.
  • a path 6x along which the plunger 6 moves extends in the longitudinal direction (that is, the axial direction) of the plunger 6. It is representatively represented by a dashed line (actually, the plunger movement path 6x has a size corresponding to the outer diameter of the plunger 6).
  • the coil spring 5 biases the plunger 6 in a direction away from the core 4 while being compressed between the main portion 4 b of the core 4 and the main portion 6 b of the plunger 6.
  • the claw portions 84b and 85b of the locking portions 84 and 85 are in a state of extending from the tips of the arm portions 84a and 85a toward the plunger movement path 6x, respectively.
  • the arm portions 84a and 85a extend to the outside of the casing 3 and 90 along the plunger movement path 6x through the through-hole 90m, and the tip side can be bent in a direction away from the plunger movement path 6x by an external force.
  • the locking portions 84 and 85 can be elastically deformed by an external force so as to allow the plunger 6 and the valve body 61 to be detached from the casings 3 and 90.
  • the arm portions 84a and 85a face the arm portions 84a and 85a and the arm portions 84a and 85a of the extended regions 90p and 90q with respect to the direction in which the arm portions 84a and 85a move away from the plunger movement path 6x (vertical direction in FIG. 4).
  • the protrusions 86A and 86B provided on the upper side of the end plate 83 of the bobbin 8 and the protrusion 87 provided on the lower side are in contact with a pair of opposite sides 90a and 90b of the yoke lid 90, respectively, and the plunger moving path It will be in the state extended to the exterior of the casings 3,90 in parallel with 6x.
  • the plunger 6 and the valve body 61 are exchanged by the following i) removal and ii) insertion procedures.
  • the arm portions 84a and 85a face the arm portions 84a and 85a and the arm portions 84a and 85a of the expansion regions 90p and 90q with respect to the direction (vertical direction) away from the plunger movement path 6x.
  • the locking portions 84 and 85 can be opened by smaller external forces C1 and C2. As a result, it is possible to prevent a situation in which the arm portions 84a and 85a are broken at the time of deformation that attempts to open the locking portions 84 and 85.
  • the plunger 6 and the valve body 61 can be detached from the casing 3, 90 (that is, the bobbin 8) through the locking portions 84, 85 in the open state.
  • a new plunger 6 provided with a valve body 61 at one end 6e is brought close to the locking portions 84 and 85 along the plunger moving path 6x in the direction shown by the arrow B1 in FIG.
  • the claw portions 84b and 85b are provided with tapered surfaces 84c and 85c that open toward the outside of the casings 3 and 90, respectively. Therefore, if an attempt is made to insert a new plunger 6 from the outside of the casing 3, 90 along the movement path 6x, first, the edge of one end 6e of the new plunger 6 (the end portion on which the valve body 61 is provided). The portion 6g contacts the tapered surfaces 84c and 85c of the claw portions 84b and 85b.
  • the locking portions 84 and 85 (the claw portions 84b and 85b) are bent from the edge 6g of the one end 6e of the new plunger 6 in the direction of moving the arm portions 84a and 85a away from the plunger moving path 6x as an external force. Receives force F3 and F4. Subsequently, when a new plunger 6 is pushed into the casings 3 and 90, the arm portions 84a and 85a are bent in the direction away from the plunger movement path 6x (vertical direction), and the claw portions 84b and 85b are partially plungerd. Detach from the movement path 6x and the locking portions 84 and 85 are partially opened. As shown by arrow B2 in FIG.
  • the plunger 6 and the valve body 61 can be easily replaced. Therefore, by changing the angle and hardness of the face of the new valve body 61 facing the flow port 4d with respect to that before replacement, various different flow characteristics can be easily realized without changing the entire solenoid valve 2. it can. Also, internal maintenance can be easily performed. Note that only the valve body 61 may be replaced by reusing the plunger 6 itself (metal part).
  • the claw portions 84b and 85b of the pair of locking portions 84 and 85 are provided with tapered surfaces 84c and 85c that open toward the outside (+ X direction). Yes.
  • These tapered surfaces 84c and 85c are curved in an arc shape along the circumferential direction of the through hole 81b. Therefore, as shown in FIGS. 8 to 9, when the new plunger 6 is pushed toward the inside of the casing 3, 90, the edge 6g of one end 6e of the new plunger 6 is partially tapered in the circumferential direction. , 85c. As a result, the one end 6e of the new plunger 6 is unlikely to come off from between the claw portions 84b and 85b of the locking portions 84 and 85, and the new plunger 6 can be easily pushed into the casing 3 and 90. .
  • the protrusions 86 ⁇ / b> A and 86 ⁇ / b> B provided on the upper side of the end plate 83 of the bobbin 8 and the protrusion 87 provided on the lower side are mutually connected to the yoke lid 90. It extends to the outside of the casing 3 and 90 in parallel with the plunger movement path 6x while being in contact with a pair of opposing sides 90a and 90b. That is, with respect to the direction (vertical direction in FIG. 6) in which the protrusions 86A and 86B provided on the upper side and the protrusion 87 provided on the lower side face the pair of sides 90a and 90b, It is sandwiched.
  • the bobbin 8 (and thus the solenoid coil 9) and the yoke lid 90 are positioned with respect to each other in the direction in which the pair of sides 90a and 90b of the yoke lid 90 face each other.
  • the magnetic flux passing through the yoke 3, the yoke lid 90, the plunger 6 and the core 4 is stabilized, and the accuracy of fluid flow rate adjustment is increased.
  • the direction in which the pair of sides 90a and 90b of the yoke lid 90 oppose is such that the locking portions 84 and 85 are used for exchanging the plunger 6 and the valve body 61 around the plunger movement path 6x.
  • the locking portions are two sets, that is, a set 84 including the arm portion 84a and the claw portion 84b and a set 85 including the arm portion 85a and the claw portion 85b. Therefore, the strength of locking the other end 6f of the plunger 6 at the time of non-operation is increased as compared with the case where there is only one set of locking portions. Further, even if a certain set of locking portions (for example, the arm portion 84a) is broken during the deformation to make the locking portions 84 and 85 open, the remaining sets of engagement are not activated. The other end 6f of the plunger 6 can be locked by the stop portion (85 in this example). In addition, only one set of the latching
  • FIG. 10 shows a schematic block configuration of an electronic sphygmomanometer (the whole is denoted by reference numeral 1) according to an embodiment of the present invention.
  • the sphygmomanometer 1 includes a cuff 20, a main body 10, a CPU (Central Processing Unit) 100 as a control unit, a display 50, a memory 51 as a storage unit, an operation unit 52, a power source, The unit 53, the pump 32, the valve 33 including the electromagnetic valve 2 described above, and the pressure sensor 31 are included.
  • the main body 10 includes an oscillation circuit 310 that converts the output from the pressure sensor 31 into a frequency, a pump drive circuit 320 that drives the pump 32, and a valve drive circuit 330 that drives the valve 33, which are mounted on the main body 10. .
  • the display 50 includes a display, an indicator, and the like, and displays predetermined information according to a control signal from the CPU 100.
  • the operation unit 52 includes a power switch 52A that receives an input of an instruction for turning the power supply unit 53 on (ON) or OFF (off), a measurement switch 52B for receiving an instruction to start blood pressure measurement, and a measurement stop And a stop switch 52C for receiving an instruction.
  • These switches 52 ⁇ / b> A, 52 ⁇ / b> B, 52 ⁇ / b> C input an operation signal according to an instruction from the user to the CPU 100.
  • the memory 51 stores program data for controlling the sphygmomanometer 1, data used for controlling the sphygmomanometer 1, setting data for setting various functions of the sphygmomanometer 1, and blood pressure value measurement results Store data etc.
  • the memory 51 is used as a work memory when the program is executed.
  • the CPU 100 operates as a cuff pressure control unit according to a program for controlling the sphygmomanometer 1 stored in the memory 51, and performs control for driving the pump 32 and the valve 33 in accordance with an operation signal from the operation unit 51. . Further, the CPU 100 calculates a blood pressure value based on a signal from the pressure sensor 31 and controls the display device 50 and the memory 51.
  • the power supply unit 53 supplies power to the CPU 100, the pressure sensor 31, the pump 32, the valve 33, the display 50, the memory 51, the oscillation circuit 310, the pump drive circuit 320, and the valve drive circuit 330.
  • the pump 32 supplies air to the fluid bag 22 in order to pressurize the pressure (cuff pressure) in the fluid bag 22 contained in the cuff 20.
  • the valve 33 is opened and closed in order to discharge or enclose the air in the fluid bag 22 to control the cuff pressure.
  • the pump drive circuit 320 drives the pump 32 based on a control signal given from the CPU 100.
  • the valve drive circuit 330 opens and closes the valve 33 based on a control signal given from the CPU 100.
  • the pressure sensor 31 and the oscillation circuit 310 function as a pressure detection unit that detects the pressure of the cuff.
  • the pressure sensor 31 is, for example, a piezoresistive pressure sensor, and is connected to the fluid bag 22 contained in the pump 32, the valve 33, and the cuff 20 via the cuff air tube 39.
  • the oscillation circuit 310 oscillates based on an electrical signal value based on a change in electrical resistance due to the piezoresistive effect from the pressure sensor 31 and outputs a frequency signal having a frequency corresponding to the electrical signal value of the pressure sensor 31 to the CPU 100. Output to.
  • a cuff When measuring blood pressure according to a general oscillometric method, the following operations are generally performed. That is, a cuff is wound around the measurement site (arm or the like) of the subject in advance, and at the time of measurement, the pump / valve is controlled so that the cuff pressure is higher than the maximum blood pressure and then gradually reduced. In the process of reducing the pressure, the cuff pressure is detected by a pressure sensor, and the fluctuation of the arterial volume generated in the artery at the measurement site is extracted as a pulse wave signal.
  • systolic blood pressure systolic blood pressure
  • diastolic blood pressure diastolic blood pressure
  • the blood pressure value of the subject is measured by the CPU 100 by the oscillometric method according to the flow of FIG.
  • the sphygmomanometer 1 starts blood pressure measurement as shown in FIG.
  • the CPU 100 initializes the processing memory area and outputs a control signal to the valve drive circuit 330.
  • the valve drive circuit 330 opens the valve 33 and exhausts the air in the fluid bag 22 of the cuff 20. Subsequently, control for adjusting 0 mmHg of the pressure sensor 31 is performed.
  • the CPU 100 When the blood pressure measurement is started, the CPU 100 first closes the valve 33 via the valve drive circuit 330 and then drives the pump 32 via the pump drive circuit 320 to perform control to send air to the fluid bag 22. . As a result, the fluid bag 22 is inflated and the cuff pressure is gradually increased (step ST101).
  • step ST102 When the cuff pressure is increased and reaches a predetermined pressure (YES in step ST102), the CPU 100 stops the pump 32 via the pump drive circuit 320, and then gradually turns the valve 33 via the valve drive circuit 330. Control to release. Thereby, the fluid bag 22 is contracted and the cuff pressure is gradually reduced (step ST103).
  • the predetermined pressure is a pressure sufficiently higher than the systolic blood pressure of the subject (for example, the systolic blood pressure + 30 mmHg), and is stored in the memory 51 in advance or the CPU 100 performs the systole during the pressurization of the cuff pressure.
  • the blood pressure is estimated and determined by a predetermined calculation formula (see, for example, JP-A-2001-70263).
  • a target target pressure reduction speed is set during the pressurization of the cuff, and the CPU 100 controls the opening degree of the valve 33 so as to be the target pressure reduction speed (see the same publication).
  • the pressure sensor 31 detects a cuff pressure signal (indicated by the symbol Pc) indicating the pressure of the cuff 20 through the cuff 20. Based on the cuff pressure signal Pc, the CPU 100 applies blood pressure values (systolic blood pressure and diastolic blood pressure) by applying an algorithm described later by the oscillometric method (step ST104).
  • the calculation of the blood pressure value is not limited to the decompression process, and may be performed in the pressurization process.
  • the CPU 100 displays the calculated blood pressure value on the display device 50 (step ST106), and performs control to store the blood pressure value in the memory 51 (step ST107).
  • the CPU 100 opens the valve 33 via the valve drive circuit 330 and performs control to exhaust the air in the fluid bag 22 of the cuff 20 (step ST108).
  • the plunger 6 and the valve body 61 can be easily replaced in the valve 33. Accordingly, various different flow characteristics can be easily realized without changing the entire valve 33. Further, maintenance inside the valve 33 can be easily performed.

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PCT/JP2014/067002 2013-07-10 2014-06-26 電磁弁およびそれを備えた電子血圧計 Ceased WO2015005123A1 (ja)

Priority Applications (3)

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DE112014003211.5T DE112014003211B4 (de) 2013-07-10 2014-06-26 Magnetventil und elektronisches Blutdrucküberwachungsgerät, welches mit diesem ausgestattet ist
CN201480038816.1A CN105358050B (zh) 2013-07-10 2014-06-26 电磁阀和具备该电磁阀的电子血压计
US14/991,647 US10080502B2 (en) 2013-07-10 2016-01-08 Solenoid valve and electronic blood pressure monitor equipped with the same

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JP2013-144390 2013-07-10
JP2013144390A JP6248439B2 (ja) 2013-07-10 2013-07-10 電磁弁およびそれを備えた電子血圧計

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DE102018100519A1 (de) * 2018-01-11 2019-07-11 Voith Patent Gmbh Ventilantrieb mit Schnellfahrfunktion
JP2020008032A (ja) * 2018-07-03 2020-01-16 オムロン株式会社 流体通路開閉装置、流量制御装置および血圧計
KR102668183B1 (ko) * 2018-08-10 2024-05-22 에이치엘만도 주식회사 코일조립체 및 그를 포함하는 솔레노이드밸브
JP7214401B2 (ja) * 2018-08-30 2023-01-30 株式会社ジェイテクトフルードパワーシステム 電磁ポンプ
DE102019113409A1 (de) * 2019-05-21 2020-11-26 ECO Holding 1 GmbH Aktuator und Ventilblock
DE102019113825B3 (de) * 2019-05-23 2020-11-26 ECO Holding 1 GmbH Aktuator und Verfahren zum Herstellen eines Aktuators
IT202100025688A1 (it) * 2021-10-07 2023-04-07 Bitron Spa Alloggiamento per valvole elettromagnetiche, elemento tubolare e relativa valvola elettromagnetica.
CN114135677B (zh) * 2021-11-20 2024-05-14 厦门坤锦电子科技有限公司 一种流量控制阀及其控制方法
KR102623687B1 (ko) * 2022-07-15 2024-01-11 우성알앤디주식회사 전자 급수 밸브의 결합 구조
JP2024064642A (ja) * 2022-10-28 2024-05-14 株式会社アイシン 給気装置
CN118924270B (zh) * 2023-05-11 2025-09-05 华为技术有限公司 电磁阀及可穿戴设备

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JP6248439B2 (ja) 2017-12-20
US10080502B2 (en) 2018-09-25
US20160120417A1 (en) 2016-05-05
JP2015016069A (ja) 2015-01-29
CN105358050A (zh) 2016-02-24
CN105358050B (zh) 2018-12-07
DE112014003211T5 (de) 2016-04-07

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