JP2005058647A - Pressure control device for air massager - Google Patents

Abstract

To reduce the number of solenoid valves of a pressure control device for an air massager.
A solenoid three-way valve 43 is connected to a compressor 41, and a sensor 44 for pressure detection is attached. Solenoid two-way valves 46 to 48 are connected in parallel to the ventilation side of the three-way valve 43, and cells 49 to 51 that are expanded and contracted by air pressure are connected to the two-way valves 46 to 48, respectively.
When the cell 49 is inflated, in the state where the compressor 41 is operated, air is supplied by the three-way valve 43, the two-way valve 46 is opened, the two-way valves 47 and 48 are closed, and the output from the sensor 44 is When the pressure value is set in advance, the two-way valve 46 is closed, the compressor 41 is further stopped, and the pressure in the cell 49 is maintained. Then, after a predetermined time has elapsed, the three-way valve 43 is switched to the exhaust side, and the two-way valve 46 is opened to exhaust the air in the cell 49.
[Selection] Figure 1

Description

  The present invention relates to a pressure control device for an air massager used in the medical and esthetic industries.

  For example, venous thrombosis that occurs in the deep veins of the lower limbs during and after surgery may develop into life-related symptoms such as pulmonary embolism. This type of air massager may be used to help promote. Alternatively, the cells may be sequentially driven to relieve fatigue and used to massage muscles.

  However, it is difficult for a conventional pressure control device for an air massager using a solenoid valve to individually adjust the pressure by simple means for each cell composed of an air bag that repeatedly expands and contracts.

  Normally, when pressure is adjusted individually for each cell, for example, three solenoid three-way valves 4 to 6 are used for three cells 1 to 3 wound around the lower limb as shown in FIG. A pneumatic circuit in which three solenoid two-way valves 7 to 9 and one compressor 10 are combined is used. However, this method requires one solenoid valve each for a three-way valve and a two-way valve for one cell, and the cost increases in proportion to the number of cells 1 to 3.

  Further, Patent Document 1 discloses a pneumatic circuit having four cells 11 to 14 as shown in FIG. 7 and having four three-way valves 15 to 18 connected to the compressor 10. However, in this pneumatic circuit, there is a problem that the air in the previously expanded cell wraps around when the next cell expands during actual use, and sufficient pressure cannot be maintained.

  In order to solve this problem, Patent Document 2 employs a method in which check valves 19 to 22 are provided on the compressor 10 side of each of the three-way valves 15 to 18 to prevent air from entering as shown in FIG. Yes.

Japanese Patent Laid-Open No. 11-19145

JP 2000-189477 A

  However, in the above-mentioned Patent Document 2, when adjusting the pressure of each cell 11-14, the pressure of the cell that swells later must be the same as or lower than the pressure of the cell swelled earlier, In order to independently adjust the pressures of the cells 11 to 14, in addition to the three-way valves 15 to 18, other three-way valves 31 to 34 are provided as shown in FIG. It is necessary to use the three-way valve, which increases the cost.

  An object of the present invention is to provide a pressure control device for an air massager that solves the above-described problems and can achieve independent pressure adjustment and cost reduction for a plurality of cells without increasing the number of solenoid valves. It is in.

  In order to achieve the above object, an air massager pressure control device according to the present invention is a pressure control device for an air massager that individually adjusts pressure for a plurality of cells that expand and contract by air pressure. A three-way valve that selectively switches the exhaust port is connected to a compressor, a plurality of two-way valves are connected in parallel to the vent of the three-way valve, and the cells are individually connected to these two-way valves for control The switching of the three-way valve and the operation of the two-way valve are individually controlled by means.

  The pressure control device for an air massager of the present invention can independently adjust the pressure of each cell without being affected by other cells.

  Further, since it is not necessary to use two solenoid valves for one cell as in the prior art, the cost can be reduced.

  The objective of adjusting the pressure independently for each cell was realized with the minimum number of solenoid valves.

  FIG. 1 shows a basic configuration diagram of a pneumatic circuit in the first embodiment. A solenoid three-way valve 43 is connected to an air supply pipe 42 for supplying air compressed by a compressor 41, and pressure is detected in the supply pipe 42. A sensor 44 is attached. Further, the solenoid three-way valve 43 has a ventilation port and an exhaust port that are alternatively selected. Solenoid two-way valves 46 to 48 are connected in parallel to a supply pipe 45 connected to the ventilation port. Cells 49 to 51 that are expanded and contracted by air pressure are connected to the solenoid two-way valves 46 to 48, respectively. The compressor 41, the three-way valve 43, and the two-way valves 46 to 48 are individually operated according to commands from a control means (not shown).

  For example, when the cell 49 is expanded, the compressor 41 is operated to supply air to the supply pipe 45 via the solenoid three-way valve 43, and the solenoid two-way valve 46 is opened by the control means, and the solenoid two-way valve 47 is also supplied. , 48 are closed, and when the output from the sensor 44 reaches a preset pressure value, the solenoid two-way valve 46 is closed, the compressor 41 is further stopped, and the pressure in the cell 49 is maintained. Then, after a certain time has elapsed, the solenoid three-way valve 43 is switched to the exhaust side, and the solenoid two-way valve 46 is opened, whereby the air in the cell 49 is exhausted through the supply pipe 45 and the cell 49 is contracted.

  Similarly, when the cell 50 is expanded, air is supplied to the supply pipe 42 by the solenoid three-way valve 45, the solenoid two-way valve 47 is opened, the solenoid two-way valves 46, 48 are closed, and the sensor 44 has a predetermined pressure. Is confirmed, the solenoid two-way valve 47 is closed, the compressor 41 is stopped, and the pressure in the cell 50 is maintained.

  In this way, by shutting off the air between the cells 49 to 51 by the solenoid two-way valves 46 to 48, air wraparound to other cells does not occur, so that independent pressure adjustment is possible regardless of other cells. It becomes possible.

  However, in this pneumatic circuit, one solenoid three-way valve 43 is shared for three solenoid two-way valves 46 to 48, so that air supply to one cell and exhaust to the other cell are performed simultaneously. I can't.

  Therefore, as shown in FIG. 2, the most common adjacent cell in the pneumatic massager cannot realize a massage pattern for supplying and exhausting air simultaneously.

  FIG. 3 shows a configuration diagram of the pneumatic circuit of the second embodiment. In order to solve the above-described problems of the first embodiment, one solenoid three-way valve 43 and three solenoid valves using the pneumatic circuit of FIG. Two sets of pneumatic circuits 61, 61 ', each of which has one set of direction valves 46-48, are used in parallel, and the supply of air to the six cells 63-68 is connected to the pneumatic circuits 61, 61' alternately. Has been.

  FIG. 4 shows a modified example of the second embodiment, and three sets of pneumatic circuits 61 in which one solenoid three-way valve 43 and two solenoid two-way valves 46 and 47 using the pneumatic circuit of FIG. , 61 ′, 61 ″ are used in parallel, and the air supply to the six cells 63 to 68 is connected to the pneumatic circuit 61, 61 ′, 61 ″ every two cells.

  Accordingly, the number of the two-way valves for the cells is the same, and by adjusting the number of the three-way valves to the number of the pneumatic circuits, it becomes possible to adjust the pressure independent of the front-rear relation of the cells 63 to 68. Between the circuits, air supply and exhaust can be performed at the same time, and the degree of freedom of the massage pattern can be greatly improved.

  FIG. 5 shows a configuration diagram of the pneumatic circuit of the third embodiment. Depending on the massage pattern, a plurality of sets of pneumatic circuits as in the second embodiment may not be used. For example, in the case of only a massage pattern that exhausts all the cells 63 to 68 at the same time after sequentially pressurizing the six cells 63 to 68, the cell, two-way valve is compared with the basic configuration diagram of FIG. By connecting in parallel six solenoid two-way valves 71 to 76 corresponding to the number of cells 63 to 68 with respect to one solenoid three-way valve 43, the individual pressure adjustment of the cells 63 to 68 can be performed. It becomes possible.

  Furthermore, in order to realize a more complicated massage pattern, it can be dealt with by increasing the number of pneumatic circuits.

1 is a basic configuration diagram of a pneumatic circuit of Example 1. FIG. It is operation | movement explanatory drawing of a cell. FIG. 6 is a configuration diagram of a pneumatic circuit according to a second embodiment. FIG. 6 is a configuration diagram of a pneumatic circuit according to a modified example of the second embodiment. FIG. 6 is a configuration diagram of a pneumatic circuit according to a third embodiment. It is a block diagram of the conventional pneumatic circuit. It is a block diagram of the conventional pneumatic circuit. It is a block diagram of the conventional pneumatic circuit. It is a block diagram of the conventional pneumatic circuit.

Explanation of symbols

41 Compressor 42, 45 Supply pipe 43 Solenoid three-way valve 44 Sensor 46-48, 71-76 Solenoid two-way valve 49-51, 63-68 Cell 61, 61 ', 61 "Pneumatic circuit

Claims (2)

  In a pressure control device for an air massager that individually adjusts pressure for a plurality of cells that expand and contract by air pressure, a three-way valve that selectively switches between a vent and an exhaust is connected to a compressor, and the three-way valve A plurality of two-way valves are connected in parallel to the vent holes, the cells are individually connected to these two-way valves, and the switching of the three-way valve and the operation of the two-way valve are individually performed by control means. A pressure control device for an air massager characterized by controlling.   The pressure control device for an air massager according to claim 1, wherein the three-way valve and the two-way valve are solenoid valves.

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