CN113513624A

CN113513624A - Valve element driving device

Info

Publication number: CN113513624A
Application number: CN202110390185.1A
Authority: CN
Inventors: 横江悟
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Instruments Corp
Priority date: 2020-04-10
Filing date: 2021-04-12
Publication date: 2021-10-19
Also published as: JP2021167633A

Abstract

A valve element driving device which suppresses leakage due to inclination of a valve element and adversely affects flow rate regulation. The valve body driving device is provided with: a plate connected to a pipe (4) for fluid flow; a housing (14) that forms a fluid flow path together with the plate; a valve body (31) which can rotate in a direction of a rotating shaft which is a direction opposite to the plate at a position opposite to the connecting port of the pipe on the plate; a drive source (10) that rotates the valve body; a transmission member that transmits a rotational force for rotating the valve body from the drive source to the valve body; a valve element holding section (100) has a flexible arm section (110) which can press the valve element against a plate with a position offset from a rotary shaft (35) of the valve element in a radial direction intersecting the rotary shaft direction as a fulcrum (130) and with a side opposite to the fulcrum as a force point (120), and the arm section has a position closer to the rotation center of the valve element in the radial direction than the tip on the side opposite to the fulcrum as the force point.

Description

Valve element driving device

Technical Field

The present invention relates to a valve element driving device.

Background

Various valve element driving devices have been used. Among such valve element driving devices, there is a valve element driving device that controls opening and closing of a pipe through which a fluid flows by rotating a valve element. Patent document 1 discloses a valve drive device that controls opening and closing of an outflow pipe through which a fluid flows by rotating a valve body held by an elastic arm portion by transmitting rotation of a pinion gear attached to a rotor support shaft through a gear.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2003-56734

Disclosure of Invention

Technical problem to be solved by the invention

However, in a valve element driving device that includes an arm portion that holds a valve element in a rotatable state and controls opening and closing of a pipe through which a fluid flows by rotating the valve element, such as the valve driving device of patent document 1, the valve element is easily tilted. This is because if a force is applied to the rotation axis of the valve body at a position offset from the rotation axis when viewed in a direction along the rotation axis, the valve body is difficult to maintain in a rotatable state, and therefore the arm portion is shaped to be pressed against a valve seat or the like supporting the valve body in an oblique direction at a position away from the rotation axis as a point of force. If the spool is tilted with respect to the valve seat, leakage may occur, causing problems in flow regulation in the pipe through which the fluid flows. Accordingly, an object of the present invention is to suppress the occurrence of leakage due to the inclination of the spool and the occurrence of problems in flow rate adjustment in the spool drive device.

Technical scheme for solving technical problem

The present invention provides a valve element driving device, comprising: a plate connected to a tube for fluid flow; a housing forming a flow path for the fluid together with the plate; a valve body that is rotatable in a direction of a rotation axis that is a direction facing the plate at a position facing the connection port of the pipe on the plate; a drive source that rotates the valve element; a transmission member that transmits a rotational force for rotating the valve body from the drive source to the valve body; and a holding portion of the valve element, the holding portion of the valve element having a flexible arm portion capable of pressing the valve element against the plate with a position offset from a rotation axis of the valve element in a radial direction intersecting the rotation axis direction as a fulcrum and with a side opposite to the fulcrum as a force point, the arm portion having a position closer to a rotation center of the valve element in the radial direction than a tip end on the side opposite to the fulcrum as the force point.

According to the present embodiment, the arm portion has a position closer to the rotation center of the valve body in the radial direction than the tip on the opposite side to the fulcrum as the force point. That is, the arm portion may exert a force near the rotation axis. Therefore, the valve body can be pressed against the plate in a state where the valve body is not easily tilted, and leakage due to the tilt of the valve body and a problem in flow rate adjustment can be suppressed.

In the valve element driving device according to the present invention, it is preferable that the force point is formed by warping the arm portion in the rotation axis direction to a side opposite to a side where the valve element is located. This is because, with a simple structure in which the arm portion is warped to the side opposite to the side where the valve element is located, it is possible to suppress the occurrence of leakage due to the inclination of the valve element and the occurrence of a problem in flow rate adjustment.

In the valve element driving device according to the present invention, it is preferable that the arm portion is provided with a hole into which the rotary shaft is fitted. This is because the valve body can be easily rotatably held by the configuration in which the hole for fitting the rotary shaft is provided.

In the valve element driving device according to the present invention, it is preferable that the holding portion is formed by bending the arm portion toward a side where the valve element is located in the rotation axis direction to form the fulcrum. This is because the structure of the fulcrum, that is, the structure of the valve body that can be pressed against the plate can be formed simply.

In the valve element driving device according to the present invention, it is preferable that the holding portion is formed by bending the arm portion in the rotation axis direction to a side opposite to a side where the valve element is located, thereby forming the force point. This is because the force point is formed by bending the arm portion, and thus the portion of the folded line to be bent can be used as the force point, and the position close to the rotation center of the valve body can be used as the force point with high accuracy.

In the valve element driving device according to the present invention, it is preferable that the holding portion is formed by bending the arm portion toward a side where the valve element is located in the rotation axis direction to form the fulcrum, and is formed by bending the arm portion toward a side opposite to the side where the valve element is located in the rotation axis direction to form the force point, and bending directions at the fulcrum and the force point are parallel to each other. This is because the force point is easily formed at a position particularly close to the rotation center of the valve body by setting the fulcrum and the bending direction at the force point to be parallel.

In the valve body driving device according to the present invention, it is preferable that the plate has a plurality of the connection ports at positions facing the valve body, and the valve body is capable of opening and closing the plurality of the connection ports provided at the facing positions. This is because the fluid can be efficiently flowed through the plurality of connection ports.

Effects of the invention

The spool drive device of the invention can suppress the occurrence of leakage due to the inclination of the spool and the occurrence of problems in flow rate regulation.

Drawings

Fig. 1 is a schematic perspective view of a valve element driving device according to an embodiment of the present invention.

Fig. 2 is a schematic perspective view of the valve element drive device of fig. 1 with the mounting portion, the outer case, and the like removed.

Fig. 3 is a schematic view of the valve element driving device in the state of fig. 2, as viewed from a different angle from fig. 2.

Fig. 4 is a schematic cross-sectional view of the valve element driving device in the state shown in fig. 3.

Fig. 5 is a schematic view of the valve element drive device shown in fig. 3 with a housing and the like removed.

Fig. 6 is a schematic plan view showing a holding portion of the valve element driving device of fig. 1.

Fig. 7 is a schematic perspective view showing a fluid path region of the valve element driving device of fig. 1.

Fig. 8 is a schematic perspective view showing a valve body of the valve body driving device of fig. 1, as viewed from a bottom surface side.

Fig. 9 is a schematic perspective view showing a valve seat of the valve element drive device of fig. 1, as viewed from the bottom surface side.

Fig. 10 is a conceptual diagram for explaining a state in which an arm portion of a holding portion of the valve element driving device of fig. 1 presses a rotating body.

Fig. 11 is a conceptual diagram for explaining a state in which the arm portion of the holding portion of the valve element driving device of the reference example presses the rotating body.

Description of the reference numerals

1 … valve core drive device; 2 … inflow tube (pipe); 3 … fluid path region; 4 … outflow tube (tube); 4a … outflow tube (tube); 4B … outflow tube (tube); 10 … driving source; 12 … outer shell; 12a … upper shell; 12B … lower housing; 14 … a housing; 14a … recess; 15 … rotor; 15a … magnet; a 16 … stator; 16a … stator coil; 17 … pinion (transmission member); 18 … fulcrum; 21 … electrical connection; 22 … mounting part; 30 … gears (transmission members); 31 … valve core; 31a … round hole; 32 … valve seat (plate); 32a … round holes; 33 … valve seat plate (plate); 34 … flow inlet; 35 … rotating shaft; 36 … outflow port; 36a … outflow port; 36B … outflow port; 37 … pressed; 38 … rotating portion; 100 … holding part; 101 … base; 101a … round hole; 102 … mounting portion; 103 … mounting part; 104 … mounting part; 110 … arm portions; 110a … front end; 111 … pressing part; 111a … round hole; 120 … bend (force point); 130 … bending part (fulcrum); 311 … contact portion; 312 … non-contact portion; 312a … non-contact portion; 312b … non-contact portion; 321A … through holes; 321B … through holes.

Detailed Description

A valve element driving device 1 according to an embodiment of the present invention will be described below with reference to fig. 1 to 10 and fig. 11 showing a valve element driving device as a reference example.

(outline of valve core drive device 1)

First, the outline of the valve element driving device 1 of the present embodiment will be described with reference to fig. 1 to 5. The valve element driving device 1 of the present embodiment is a device as follows: the valve body 31 is used in a refrigerator or the like, and controls the flow of the refrigerant as a fluid from the outflow pipe 4 by rotating the valve body to change the arrangement with respect to the valve seat 32. However, the present invention is not limited to such a valve element driving device. In the drawings, the X-axis direction, the Y-axis direction, and the Z-axis direction are orthogonal to each other, and the X-axis direction corresponds to the direction in which the valve body 31 faces the valve seat 32 and to the direction of the rotation axis of the valve body 31.

As shown in fig. 1 to 5, the valve element driving device 1 of the present embodiment includes an inflow tube 2 for fluid, a fluid passage area 3 constituting a passage for the fluid flowing in from the inflow tube 2, and an outflow tube 4 for allowing the fluid to flow out from the fluid passage area 3. Further, the present invention includes an outer case 12 that houses a drive source 10 (see fig. 4) and the like for rotating a valve body 31 provided in the fluid path region 3, an electrical connection portion 21 that is connected to an external device to input an electrical signal to the drive source 10, and a mounting portion 22 for mounting to an external device such as a refrigerator. As shown in fig. 1, the valve element drive device 1 of the present embodiment includes an upper case 12A and a lower case 12B as the outer case 12.

As shown in fig. 4, the valve drive device 1 is configured by forming a valve seat plate 33 formed by press-molding a metal plate, hermetically sealing the valve seat plate with the housing 14, and rotationally driving the rotor 15 by the stator 16 which is closely attached to the outside of the housing 14 and provided in the circumferential direction. That is, the driving source 10 is constituted by the rotor 15, the stator 16, and the like. The electrical connection portion 21 connected to the stator coil 16a of the stator 16 via a lead wire receives a drive signal from an external device such as a computer, and controls the rotation and stop of the rotor 15 at a predetermined angle.

In rotor 15, magnet 15a is integrally fixed to the outer periphery, pinion gear 17 is formed at the end portion on the valve seat plate 33 side, and rotor 15 is rotatably supported by support shaft 18 fixed to housing 14 and valve seat plate 33. The housing 14 is formed so that the outer peripheral surface of the magnet 15a of the rotor 15 and the inner peripheral surface of the stator coil 16a are close to each other, and is provided with a recess 14a which is fitted to one end of the support shaft 18 and stably supported at the center. The valve seat plate 33 is fitted to the case 14 on the side opposite to the side where the recess 14a is provided.

Here, the other end of the support shaft 18 is fixed to the valve seat plate 33. As shown in fig. 3 and the like, the inflow pipe 2 and the valve seat 32 are fitted to the valve seat plate 33. The inflow pipe 2 is fitted to the inflow port 34. The valve seat 32 is provided with two fluid outlet ports 36, an outlet port 36A into which the outlet tube 4A is fitted, and an outlet tube 4B fitted into the outlet port 36B. The valve seat 32 is fitted to the valve seat plate 33 to form one plate together with the valve seat plate 33.

As shown in fig. 4 and 5, a valve body 31 fixed to the gear 30 is provided at a position facing the valve seat 32 in the X-axis direction. In addition, the gear 30 is also fixed to a pressed portion 37 on the side opposite to the valve element 31, and the pressed portion 37 is pressed toward the valve seat 32 side by a pressing portion 111 of an arm portion 110 of the holding portion 100 described in detail later. The gear 30 is fitted to the pinion gear 17, and has the following structure: by rotating the rotor 15, the valve body 31 can be rotated together with the gear 30 via the pinion gear 17 and the gear 30 with reference to the rotation shaft 35 along the X-axis direction. That is, with such a configuration, the rotating portion 38 is formed by the valve body 31, the gear 30, and the pressed portion 37.

(Structure of holding part 100)

Next, the detailed structure of the holding portion 100 will be described mainly with reference to fig. 6 to 11. The holding portion 100 of the present embodiment is configured to be able to hold the entire rotating portion 38 in a state of being separated from the valve seat 32 when the valve element drive device 1 is assembled. Therefore, for example, when welding work is performed in association with assembling the valve body driving device 1, heat transfer to the valve body 31 and the like in association with the welding work can be suppressed.

As shown in fig. 6 and 7, the holding portion 100 includes: a substantially disk-shaped base 101 that is horizontal in the Y-axis direction and the Z-axis direction; mounting

portions

102, 103, and 104 for mounting to the inside of the fluid path region 3; and a flexible arm portion 110 capable of pressing the rotation portion 38 against the valve seat 32 side. The mounting

portions

102, 103, and 104 and the arm portion 110 are provided to the base 101. In addition, a circular hole 101a through which the pinion gear 17 passes is formed in the base 101.

The arm 110 has a bent portion 130 bent with respect to the base 101 as a base end. The arm 110 is folded toward the valve seat 32 with the folded portion 130 as a fold. A pressing portion 111 is formed on the side of the distal end portion 110a opposite to the bent portion 130 as the base end. A circular hole 111a through which the rotary shaft 35 passes is formed in the pressing portion 111. Further, a bent portion 120 is formed in the pressing portion 111, and a distal end portion 110a of the bent portion 120 is bent toward a side opposite to the valve seat 32 side. Specifically, the pressing portion 111 is bent toward the side opposite to the valve seat 32 side with the bent portion 120 formed at the position of the circular hole 111a as a fold.

As described above, in the arm portion 110 of the present embodiment, the bent portion 120 is formed at the position of the circular hole 111a of the pressing portion 111. Therefore, as shown in fig. 10, the rotating portion 38 can be pressed toward the valve seat 32 side at the bent portion 120. That is, as shown by an arrow F1 in the figure, the rotating portion 38 can be pressed toward the valve seat 32 side at a position close to the rotating shaft 35. Therefore, the valve body 31 can be suppressed from being pressed against the valve seat 32 in a state where the rotating portion 38 is tilted.

On the other hand, in the arm portion 110 of the valve element driving device 1 of the reference example in which the bent portion 120 is not formed in the pressing portion 111, as shown in fig. 11, the rotating portion 38 is pressed toward the valve seat 32 side at the distal end portion 110 a. In such a configuration, the position of the rotation shaft 35 and the pressing position of the distal end portion 110a to the rotation portion 38 are separated. Therefore, a force as indicated by an arrow F2 in the figure is applied to the rotating portion 38, and there is a possibility that the valve body 31 is pressed against the valve seat 32 in a state where the rotating portion 38 is inclined.

Here, when the holding portion 100 of the present embodiment is described in a manner different from the above description, the holding portion 100 of the present embodiment has the arm portion 110 having flexibility, which can press the valve body 31 against the valve seat 32, which is a plate together with the valve seat plate 33, with the bent portion 120 as a fulcrum, which is a position shifted from the rotation axis 35 of the valve body 31 in the radial direction intersecting the rotation axis direction of the rotation axis 35, and with the side opposite to the bent portion 120 as a force point. Specifically, the arm portion 110 has the bent portion 130, which is a position closer to the rotation center of the valve body 31 in the radial direction than the tip end portion 110a, which is the tip end on the opposite side of the bent portion 120, as a force point. Here, the "tip" refers to a tip on an extension line in a direction extending from the base end of the arm portion 110. The "direction extending from the base end" may be linear or curved.

In this way, in the holding portion 100 of the present embodiment, the arm portion 110 has a position closer to the rotation center of the valve body 31 in the radial direction than the tip on the opposite side to the fulcrum as a point of force. That is, the arm 110 may exert a force in the vicinity of the rotation shaft 35. Therefore, the valve element drive device 1 of the present embodiment can press the valve element 31 against the valve seat 32 in a state where the valve element 31 is not easily tilted, and can suppress leakage from occurring due to the tilt of the valve element 31 and cause a problem in flow rate adjustment.

Here, the valve element driving device 1 of the present embodiment has the inflow tube 2 and the outflow tube 4 as tubes through which the fluid flows, but the outflow tube 4 is provided with a connection port at a position facing the valve element 31. However, the present invention may be configured such that the inflow pipe 2 is provided with a connection port at a position facing the valve body 31. Further, the valve drive device 1 of the present embodiment is formed as a single plate by fitting the valve seat 32 to the valve seat plate 33, but the present invention may be a plate in which the valve seat 32 and the valve seat plate 33 are integrally formed. The valve element drive device 1 of the present embodiment includes the pinion gear 17 and the gear 30 as transmission members for transmitting the rotational force for rotating the valve element 31 from the drive source 10 to the valve element 31, but may be configured differently from the present embodiment as long as the drive force of the drive source 10 can be transmitted to the rotating portion 38 held by the holding portion 100 via the transmission members. The phrase "a structure capable of transmitting the driving force of the drive source 10 to the rotating portion 38 held by the holding portion 100 via a transmission member" means any structure as long as the valve body 31 is not directly attached to the rotating shaft of the drive source 10 and the rotating shaft of the valve body 31 are common.

Here, as described above, the arm portion 110 is provided with the circular hole 111a as a hole into which the rotation shaft 35 is fitted. By configuring such that a hole for fitting the rotary shaft 35 is provided, the valve body 31 can be easily held rotatably.

As described above, the holding portion 100 forms a force point by bending the arm portion 110 in the rotation axis direction to the side opposite to the side where the valve body 31 is located. By forming the force point by the bending of the arm portion 110, the portion of the folded line to be bent can be used as the force point, and the position close to the rotation center of the valve body 31 can be used as the force point with high accuracy. For example, the arm 110 may be curved in a curved shape to form the force point, but if such a configuration is adopted, the contact position (the position of the force point) with the rotating portion 38 (the pressed portion 37) is likely to be displaced.

The present invention is not limited to the configuration in which the arm portion 110 is bent in the rotation axis direction to the side opposite to the side where the valve body 31 is located to form the force point. However, whether or not there is a fold, it is preferable to form the force point by warping the arm 110 in the rotation axis direction to the side opposite to the side where the valve body 31 is located. This is because leakage due to the inclination of the valve body 31 and a problem in flow rate adjustment can be suppressed by a simple structure in which the arm portion 110 is warped to the side opposite to the side where the valve body 31 is located.

As described above, the holding portion 100 is preferably configured such that the arm portion 110 is bent toward the side of the valve body 31 in the rotation axis direction to form a fulcrum. This is because a structure of a fulcrum, that is, a structure capable of pressing the valve body 31 against the plate (valve seat 32) can be formed simply.

Further, it is preferable that the holding portion 100 has a fulcrum formed by bending the arm portion 110 toward the side where the valve element 31 is located in the rotation axis direction and a force point formed by bending the arm portion 110 toward the side opposite to the side where the valve element 31 is located in the rotation axis direction, as in the valve element driving device 1 of the present embodiment, and the bending directions (the directions of the folds at the bent portions 120 and 130) at the fulcrum and the force point are parallel to each other as shown in fig. 6. This is because the force point is easily formed at a position particularly close to the rotation center of the valve body 31 by setting the fulcrum and the bending direction at the force point to be parallel.

As shown in fig. 8, the valve element driving device 1 of the present embodiment is provided with a contact portion 311 that contacts the valve seat 32 by protruding to the side facing the valve seat 32 and a non-contact portion 312 that does not contact the valve seat 32 by being recessed to the side facing the valve seat 32, on the side facing the valve seat 32. As the non-contact portion 312, two non-contact portions, a non-contact portion 312a and a non-contact portion 312b, are provided. Further, a circular hole 31a into which the rotation shaft 35 is fitted is provided in a central portion as viewed from the rotation shaft direction.

As shown in fig. 9 and the like, the valve element driving device 1 of the present embodiment is provided with an outlet port 36A fitted to the outlet pipe 4A and an outlet port 36B fitted to the outlet pipe 4B on the valve seat 32. The outlet port 36A is provided with a through hole 321A on the side facing the valve body 31, and the outlet port 36B is provided with a through hole 321B on the side facing the valve body 31. Further, a circular hole 32a into which the rotation shaft 35 is fitted is provided in a central portion as viewed from the rotation shaft direction.

When the contact portion 311 is disposed at a position facing the outlet 36, the outlet 36 is in a closed state. On the other hand, when the non-contact portion 312 is disposed at a position facing the outlet 36, the outlet 36 is in an open state. By forming the valve body 31 into the shape shown in fig. 8 and forming the valve seat 32 into the shape shown in fig. 9, the valve body drive device 1 of the present embodiment can achieve the following states by adjusting the arrangement of the valve body 31 with respect to the valve seat 32 in the rotational direction: the outflow port 36A and the outflow port 36B are both closed; the outflow port 36A and the outflow port 36B are both opened; the outflow port 36A is in a closed state and the outflow port 36B is in an open state; and the outflow port 36A is in an open state and the outflow port 36B is in a closed state.

As described above, in the valve element driving device 1 of the present embodiment, the valve seat 32 is provided with the two outlet ports 36 (the outlet port 36A and the outlet port 36B). Further, the valve body 31 can open/close the outlet port 36A and the outlet port 36B. In this way, it is preferable that a plurality of connection ports be provided at positions on the plate facing the valve body 31, and the valve body 31 be capable of opening and closing the plurality of connection ports provided at the facing positions. This is because the fluid can be made to flow efficiently through the plurality of connection ports.

Here, the valve body 31 rotates about the rotation shaft 35, and in fig. 10 and 11, the non-contact portion 312 of the valve body 31 is disposed on the distal end side (the distal end portion 110a side) of the arm portion 110. In such a state, the valve body 31 is more likely to be inclined with respect to the valve seat 32 than in a state where the contact portion 311 of the valve body 31 is disposed on the distal end side of the arm portion 110. Therefore, in the configuration in which the non-contact portion 312 of the valve body 31 is disposed so as to reach the distal end side of the arm portion 110 when the outlet port 36 is in the closed state, it is necessary to suppress the inclination of the valve body 31 with respect to the valve seat 32 in particular in order to suppress the leakage of the fluid in the closed state.

However, as described above, in the valve element driving device 1 of the present embodiment, the arm portion 110 has the position (the bent portion 130) closer to the rotation center of the valve element 31 in the radial direction than the tip end portion 110a as the point of force. Therefore, even in the configuration in which the non-contact portion 312 of the valve body 31 reaches the distal end side of the arm portion 110 when the outlet port 36 is in the closed state, the valve body 31 can be effectively prevented from being inclined with respect to the valve seat 32.

However, the flexible arm portion 110 can press the valve body 31 against the plate with a position offset in the radial direction with respect to the rotation axis of the valve body 31 as a fulcrum and a side opposite to the fulcrum as a point of force, and in the configuration of the arm portion 110 having this flexibility, even in the configuration in which the contact portion 311 of the valve body 31 reaches the tip end side of the arm portion 110 when the outlet port 36 is in the closed state, the valve body 31 may be inclined with respect to the valve seat 32 by the pressing force of the arm portion 110 or the like. As in the valve element driving device 1 of the present embodiment, the arm portion 110 has a position closer to the rotation center of the valve element 31 in the radial direction than the distal end portion 110a as a point of force, and thus, even with such a configuration, it is possible to effectively suppress the inclination of the valve element 31 with respect to the valve seat 32.

The present invention is not limited to the above-described embodiments, and can be realized by various configurations without departing from the spirit thereof. For example, in order to solve part or all of the above-described technical problems or achieve part or all of the above-described effects, technical features in embodiments corresponding to technical features in the respective aspects described in the summary of the invention may be appropriately replaced or combined. In addition, if this technical feature is not described as an essential content in the present specification, it can be deleted as appropriate.

Claims

1. A valve element driving device is characterized by comprising:

a plate connected to a tube for fluid flow;

a housing forming a flow path for the fluid together with the plate;

a valve body that is rotatable in a direction of a rotation axis that is a direction facing the plate at a position facing the connection port of the pipe on the plate;

a drive source that rotates the valve element;

a transmission member that transmits a rotational force for rotating the valve body from the drive source to the valve body; and

a holding portion of the valve body, the holding portion having a flexible arm portion capable of pressing the valve body against the plate with a position offset from a rotation axis of the valve body in a radial direction intersecting the rotation axis direction as a fulcrum and with a side opposite to the fulcrum as a point of force,

the arm portion has a position closer to a rotation center of the valve body in the radial direction than a front end on a side opposite to the fulcrum as the force point.

2. The valve core drive device according to claim 1,

the force point is formed by warping the arm portion in the rotation axis direction to a side opposite to a side where the valve element is located.

3. The valve core driving device according to claim 1 or 2,

the arm portion is provided with a hole to be fitted with the rotary shaft.

4. The spool drive device according to any one of claims 1 to 3,

the holding portion forms the fulcrum by bending the arm portion toward the side where the valve element is located in the rotation axis direction.

5. The spool drive device according to any one of claims 1 to 4,

the holding portion forms the force point by bending the arm portion in the rotation axis direction to a side opposite to a side where the valve element is located.

6. The spool drive device according to any one of claims 1 to 3,

the holding portion forms the fulcrum by bending the arm portion to a side where the valve element is located in the rotation axis direction, and forms the force point by bending the arm portion to a side opposite to the side where the valve element is located in the rotation axis direction, and the fulcrum and a bending direction at the force point are parallel.

7. The spool drive device according to any one of claims 1 to 6,

the plate has a plurality of the connection ports at positions opposed to the valve element,

the valve body is capable of opening and closing the plurality of connection ports provided at the opposing positions.