Liquid material discharge device

Abstract

The present invention provides a liquid material discharge device in which the operation of a valve element follows the high-speed operation of an actuator without using a strong spring. The present invention provides a liquid material discharge device including a valve rod (105) having a valve body provided at a front end portion and an abutting portion, a liquid chamber in which the valve body is allowed to move in and out, a nozzle communicating with the liquid chamber, a valve seat (108) having a hole communicating the liquid chamber with the nozzle, an arm (121) separably abutting against the valve rod, and a valve driving device allowing the valve body to move in and out with respect to the valve seat by rotating the arm (121), the liquid material discharge device including a linking device (201) linking the valve rod (105) to the arm (121), the linking device (201) including a pressing portion pressing the abutting portion against the arm (121).

Description

Technical Field

[0001] This invention relates to a liquid material dispensing device, which dispenses liquid material from a nozzle by moving a valve body disposed on a valve stem relative to a valve seat. Background Technology

[0002] A known dispensing device ejects liquid material in droplets from a nozzle connected to an orifice in the valve seat by moving a valve body mounted on a valve stem back and forth relative to a valve seat. In such a dispensing device, the valve body mounted on the valve stem moves forward at high speed by an actuator such as an air pressure or a piezoelectric element, thus ejecting minute amounts of liquid droplets.

[0003] The aforementioned dispensing device has a mechanism that does not directly connect the actuator and the valve stem, but transmits the driving force generated by the actuator toward the valve stem.

[0004] For example, Patent Document 1 relates to an injection device comprising: a drive pin that reciprocates via an actuator; a nozzle having a fluid outlet; a module body having a fluid inlet, a portion supporting the nozzle, and a fluid chamber; a valve seat having an opening in communication with the fluid outlet; a movable element having a portion defining the boundary of the fluid chamber; and a valve element housed within the fluid chamber and mounted on the movable element; the valve element moves toward the valve seat through contact with the drive pin and a portion of the movable element; the injection device further comprises a potential energy amplification element configured to contact the movable element and apply an axial spring force to the movable element; the valve element and the movable element are configured to be moved away from the valve seat by the axial spring force.

[0005] Furthermore, Patent Document 2 relates to a liquid material dispensing device comprising: a liquid chamber connected to a dispensing outlet for supplying liquid material; a plunger whose front end moves back and forth within the liquid chamber; an elastic body that applies potential energy to the plunger upwards; an arm that presses the plunger downwards; and an arm driving device that actuates the arm; the liquid material dispensing device is configured such that when the arm rises, the plunger also rises due to the additional force of the potential energy of the elastic body.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2013-46906

[0009] Patent Document 2: International Publication No. 2017 / 122683 Summary of the Invention

[0010] The problem the invention aims to solve

[0011] The devices described in the aforementioned documents have a potential energy supplement, namely a spring, which moves the valve element and plunger, which have been moved downwards by the actuator, back to their original position (upwards). In these devices, in order to eject a large number of droplets in a short time, the valve element needs to be actuated at high speed by the actuator.

[0012] However, if the valve element's moving speed is set to high speed, although the spring can return the valve element to its original position, its movement may not be able to follow the actuator's movement, resulting in separation or collision between the actuator and the valve element, thus preventing the droplet from being ejected. To address this issue, increasing the spring constant to make it follow the actuator's movement could be considered, but a spring with a larger spring constant requires more force to operate, thus increasing the load on the actuator.

[0013] Furthermore, in piezoelectric actuators, increasing the force typically results in a smaller displacement. Therefore, if a spring with a large spring constant is used, the distance the valve element can move becomes shorter, potentially making it impossible to guarantee the required movement distance (stroke).

[0014] Therefore, the object of the present invention is to provide a liquid material dispensing device that can make the valve element follow the high-speed action of the actuator even without the use of a strong spring.

[0015] Technical means to solve the problem

[0016] The liquid material dispensing device of the present invention comprises: a valve stem having a valve body and an abutment portion disposed at a front end; a liquid chamber for the valve body to move forward and backward; a nozzle communicating with the liquid chamber; a valve seat having an orifice communicating with the liquid chamber and the nozzle; an arm detachably abutting against the valve stem; and a valve driving device for moving the valve body forward and backward relative to the valve seat by rotating the arm. The liquid material dispensing device is characterized by comprising: a connecting device for connecting the valve stem to the arm; the connecting device having a pressing portion for pressing the abutment portion against the arm.

[0017] In the liquid material dispensing device, the arm may also have a receiving portion for receiving the abutment portion of the valve stem.

[0018] If the arm is rotated, the abutting portion of the valve stem rotates relative to the receiving portion.

[0019] In the liquid material dispensing device, the pressing part may also be composed of a plate-shaped elastomer.

[0020] In the liquid material dispensing device, the receiving portion may be formed on the upper surface of the arm, the arm having a through hole through which the valve stem is inserted in the receiving portion, the abutting portion being wider than the valve stem, and the upper surface of the abutting portion being flat and the lower surface being circular.

[0021] In the liquid material dispensing device, the receiving portion of the arm may be formed on the lower surface of the arm, the abutting portion may be wider than the valve stem, and the lower surface of the abutting portion may be flat while the upper surface may be circular.

[0022] In the liquid material dispensing device, the pressing part may also have a notch for arranging the valve stem.

[0023] In the liquid material dispensing device, the connecting device may further include: a locking portion extending in the same direction as the pressing portion; and a connecting portion connecting the locking portion and the pressing portion; and clamping the arm portion through the locking portion and the pressing portion.

[0024] In the liquid material dispensing device, the locking part may also have a top that abuts against the arm.

[0025] In the liquid material dispensing device, the arm may also have a recess for receiving the top of the locking part.

[0026] In the liquid material dispensing device, the locking part may have a plurality of tops that abut against the arm and a recess located between the plurality of tops, and the arm may have a protrusion that is received by the recess of the locking part.

[0027] In the liquid material dispensing device, the pressing part may also have a top that abuts against the abutting part.

[0028] In the liquid material dispensing device, there may also be a connecting member that connects the connecting device to the arm, and the connecting portion has a hole through which the connecting member is inserted.

[0029] In the liquid material dispensing device, the connecting device may also include: a fixing part that is continuous with the pressing part; and a connecting member that fixes the fixing part to the arm.

[0030] In the liquid material dispensing device, the fixing part may extend in a direction substantially orthogonal to the pressing part and be fixed to the front end of the arm by a webbing member.

[0031] In the liquid material dispensing device, the webbing component may also be fixed to the upper or lower surface of the arm.

[0032] In the liquid material dispensing device, the pressing part may also have a top that abuts against the abutting part.

[0033] In the liquid material dispensing device, the top of the pressing part may also be configured as an end.

[0034] In the liquid material dispensing device, it may also include a shaft portion that rotatably fixes the connecting device to the arm.

[0035] In the liquid material dispensing device, the pressing part may also be composed of a pair of bridge parts provided on the arm.

[0036] In the liquid material dispensing device, the pressing part may be a plate-shaped elastomer with a recess, and the abutting part may consist of a first abutting part that abuts against the arm and a second abutting part that is provided in a manner that protrudes from the valve stem and is pressed by the recesses of the pair of bridges.

[0037] In the liquid material dispensing device, the pressing part may be a rod-shaped elastic body, and the abutting part may have a circular upper surface and a circular lower surface.

[0038] In the liquid material dispensing device, the valve stem may have a reduced diameter portion forming a stepped portion, and the pressing portion may press the stepped portion.

[0039] In the liquid material dispensing device, the valve driving device may also have a piezoelectric actuator.

[0040] In the liquid material dispensing device, the valve body can be moved forward by the valve driving device, thereby dispensing a drop of liquid from the nozzle.

[0041] The effects of the invention

[0042] According to the present invention, a liquid material dispensing device can be provided, which can make the movement of the valve element follow the high-speed movement of the actuator even without the use of a strong spring.

[0043] In addition, it can also ensure the required stroke amount depending on the application. Attached Figure Description

[0044] Figure 1 This is a partial cross-sectional view illustrating the ejection device equipped with the connecting device of the first embodiment.

[0045] Figure 2 A partially enlarged view illustrating the detailed configuration of the connecting device in the first embodiment.

[0046] In this diagram, (A) is a top view, (B) is a sectional view of the side section, and (C) is a bottom view.

[0047] Figure 3 The side view is provided to illustrate the installation and removal method of the connecting device according to the first embodiment, wherein (A) and (B) represent the installation method, and (C) and (D) represent the disassembly method.

[0048] Figure 4 This is a partially enlarged cross-sectional view illustrating the connecting device of the second embodiment.

[0049] Figure 5 In the diagram, (A) is a partially enlarged view of the connecting device of the third embodiment in which the storage part is provided on the lower surface of the arm, and (B) is a partially enlarged view of the connecting device of the fourth embodiment in which the storage part is provided on the upper surface of the arm.

[0050] Figure 6 In the diagram, (A) is a partially enlarged view of a connecting device according to a fifth embodiment, in which a storage portion is provided on the lower surface of the arm and a recess is provided on the upper surface of the arm; (B) is a partially enlarged view of a connecting device according to a sixth embodiment, in which a storage portion is provided on the lower surface of the arm and a protrusion is provided on the upper surface of the arm; (C) is a partially enlarged view of a connecting device according to a seventh embodiment, in which a storage portion is provided on the upper surface of the arm and a recess is provided on the lower surface of the arm; and (D) is a partially enlarged view of a connecting device according to an eighth embodiment, in which a storage portion is provided on the upper surface of the arm and a protrusion is provided on the lower surface of the arm.

[0051] Figure 7 In the diagram, (A) is a partially enlarged view of a connecting device according to a ninth embodiment, in which a storage part is provided on the lower surface of the arm and a pressing part is used as the top; (B) is a partially enlarged view of a connecting device according to a tenth embodiment, in which a storage part is provided on the lower surface of the arm and a pressing part is used as the end; (C) is a partially enlarged view of a connecting device according to an eleventh embodiment, in which a storage part is provided on the upper surface of the arm and a pressing part is made convex; and (D) is a partially enlarged view of a connecting device according to a twelfth embodiment, in which a storage part is provided on the upper surface of the arm and a pressing part is used as the end.

[0052] Figure 8 In the diagram, (A) is a partially enlarged view of the connecting device of the thirteenth embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is the top; (B) is a partially enlarged view of the connecting device of the fourteenth embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is the end; (C) is a partially enlarged view of the connecting device of the fifteenth embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is the top; and (D) is a partially enlarged view of the connecting device of the sixteenth embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is the end.

[0053] Figure 9 In the diagram, (A) is a partially enlarged view of the connecting device of the seventeenth embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is the top; (B) is a partially enlarged view of the connecting device of the eighteenth embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is the end; (C) is a partially enlarged view of the connecting device of the nineteenth embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is the top; and (D) is a partially enlarged view of the connecting device of the twentieth embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is the end.

[0054] Figure 10 In the diagram, (A) is a partially enlarged view of the connecting device of the twenty-first embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is at the top; (B) is a partially enlarged view of the connecting device of the twenty-second embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is at the end; (C) is a partially enlarged view of the connecting device of the twenty-third embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is at the top; and (D) is a partially enlarged view of the connecting device of the twenty-fourth embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is at the end.

[0055] Figure 11 In the figures, (A) is a partially enlarged view of the connecting device of the twenty-fifth embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is arranged parallel to the front-back direction of the arm; (B) is a partially enlarged view of the connecting device of the twenty-sixth embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is arranged parallel to the front-back direction of the arm; (C) is a partially enlarged view of the connecting device of the twenty-seventh embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is arranged parallel to the width direction of the arm; and (D) is a partially enlarged view of the connecting device of the twenty-eighth embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is arranged parallel to the width direction of the arm. Furthermore, in each figure, the right side represents the front view and the left side represents the side view.

[0056] Figure 12 In the figures, (A) is a partially enlarged view of the connecting device of the twenty-ninth embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is arranged parallel to the front-back direction of the arm; (B) is a partially enlarged view of the connecting device of the thirtieth embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is arranged parallel to the front-back direction of the arm; (C) is a partially enlarged view of the connecting device of the thirty-first embodiment, in which the storage part is provided on the lower surface of the arm and the pressing part is arranged parallel to the width direction of the arm; and (D) is a partially enlarged view of the connecting device of the thirty-second embodiment, in which the storage part is provided on the upper surface of the arm and the pressing part is arranged parallel to the width direction of the arm. Furthermore, in each figure, the right side represents the front view and the left side represents the side view.

[0057] Figure 13 This is a partially enlarged view illustrating the connecting device of the thirty-third embodiment. Detailed Implementation

[0058] The following describes how to implement the present invention.

[0059] Furthermore, for ease of explanation, the following will refer to the nozzle side as "lower", the arm side as "upper", the valve device side as "front", and the valve drive device side as "rear".

[0060] <First Implementation>

[0061] (Dispensing device)

[0062] like Figure 1 As shown, the first embodiment of the ejection device 101 relates to a jet ejection device, which uses a valve device 102, a valve drive device 103, and a base member 104 provided with these devices as main components, and ejects liquid material 117 in a droplet manner.

[0063] The valve device 102 is disposed on the front side of the base member 104 and is mainly composed of a valve body 106 and a valve seat 108. The lower end of the valve stem 105 of the valve body 106 is located in a liquid chamber 112 disposed below the front of the base member 104. Although the valve body 106 is exemplified as a cylindrical shape with a flat front end, it is not limited to this shape. For example, it may also be spherical, concave, pointed, or have a protrusion provided at a position opposite to the discharge port 111.

[0064] On the other hand, an abutment portion 107 is provided at the upper end of the valve stem 105, and the abutment portion 107 abuts against the arm 121 of the valve drive device 103 in a separable manner. In this embodiment, the abutment portion 107 is circular in plan view and is formed to have a larger diameter than the valve stem 105 body. However, the shape of the abutment portion 107 does not need to be circular in plan view, as long as it is wider than the valve stem 105 body. The upper surface of the abutment portion 107 that abuts against the arm 121 is formed as a curved surface (with a circular surface), and can accommodate changes in the contact position and angle caused by the rotation of the arm 121 (reference numerals 122, 123). The valve stem 105 is inserted through a cylindrical bushing 114 and an annular sealing member 115 disposed in the insertion hole 113. The upper surface of the liquid chamber 112 has a hole communicating with the insertion hole 113, and a nozzle 110 with a discharge port 111 is installed at the lower end. Valve seat 108 is disposed on the upper surface of nozzle 110, forming the bottom surface of liquid chamber 112. A through hole 109 is provided in valve seat 108, connecting liquid chamber 112 with outlet 111 of nozzle 110. Figure 1Although the valve seat 108 and the nozzle 110 are separate, the inner bottom surface of the nozzle 110 can also be integrated with the valve seat 108. A liquid inlet 116 for supplying liquid material 117 is provided on the side of the liquid chamber 112. The liquid inlet 116 is connected to a liquid material supply source such as a storage container (not shown).

[0065] The valve actuation device 103 consists of two actuators (118, 119) arranged in a front-rear direction on a base member 104. The lower ends of the actuators (118, 119) are connected to a rocking mechanism (not shown), and the upper ends are fixed to the arm 121. The actuators (118, 119) are piezoelectric actuators constructed from piezoelectric elements of the same specification. These actuators actuate the valve in the lamination direction (in...) by applying a voltage. Figure 1 The arm 121 is a rod-shaped member extending from the actuators (118, 119) toward the valve device 102, and is fixed to the base member 104 by means of a clamping actuator (118, 119) using a fixing member 120 disposed between the two actuators (118, 119). The arm 121 abuts against the abutment portion 107 at the upper end of the valve stem 105 via a recessed receiving portion 209 on its lower front surface, and is connected to the valve stem 105 via a connecting device 201 described later. The receiving portion 209 is formed to be larger than the abutment portion 107 of the valve stem 105, thereby allowing changes in the position or angle of the valve stem 105 caused by the rotation of the arm 121. The depth of the receiving portion 209 is formed to be the same as the thickness of the abutment portion 107 of the valve stem 105. The valve stem 105 is connected to the arm 121 of the connecting device 201, so that the displacement of the actuator (118, 119) can be transmitted to the valve stem 105 via the arm 121, thereby enabling the valve body 106 to move forward and backward relative to the valve seat 108.

[0066] From the viewpoint of protecting the operator and the device, the dispensing device 101 in this embodiment is covered by the cover 124, which is indicated by the dashed line.

[0067] Figure 1 The ejection device 101 operates in roughly the following manner.

[0068] The position of the valve body 106 when the first actuator 118 on the front side and the second actuator 119 on the rear side do not produce displacement is set to the neutral position.

[0069] If the setting is such that the first actuator 118 on the front side extends and the second actuator 119 on the rear side retracts or does not move, then the arm 121 is centered on the fixing member 120 and faces upward (from...). Figure 1When viewed from the direction of rotation (counterclockwise), the arm 121 rotates, and the front of the arm 121 rises (symbol 122). If the arm 121 rises, the valve stem 105 connected to the connecting device 201 rises, and the valve body 106 moves in a direction away from the valve seat 108 (in this embodiment, this direction is called the backward direction). The position of the valve body 106 at this time is set as the rising position.

[0070] If the first actuator 118 on the front side is set to a retracted displacement or no displacement state, and the second actuator 119 on the rear side is extended displacement, then the arm 121 will move downwards with the fixing member 120 as the center (from...). Figure 1 When viewed from the direction of rotation (clockwise), the arm 121 rotates, and the front of the arm 121 descends (symbol 123). When the front of the arm 121 descends, the valve stem 105 connected to the connecting device 201 is pressed down by the arm 121 and descends, and the valve body 106 moves toward the direction of approaching the valve seat 108 (in this embodiment, this direction is called the forward direction). The position of the valve body 106 at this time is set as the descending position.

[0071] The stroke is the distance traveled from the rising position to the neutral position, from the neutral position to the falling position, or from the rising position to the falling position.

[0072] By combining the above actions, the valve body 106 can move forward and backward within the liquid chamber 112. Specifically, by applying an inertial force to the liquid material 117 located below the valve body 106 through the aforementioned descent action, the liquid material 117 can be discharged from the discharge port 111 of the nozzle 110.

[0073] The stroke amount can be adjusted by adjusting the displacement of the two actuators (118, 119). Then, by adjusting the stroke amount, the amount of liquid material 117 ejected from the outlet 111 of the nozzle 110 can be adjusted.

[0074] (Connecting device)

[0075] (1) Composition

[0076] like Figure 2 As shown, the connecting device 201 of the dispensing device 101 in the first embodiment is composed of a pressing part 202, a locking part 203, and a connecting part 204. The connecting device 201 is formed entirely of a plate-shaped elastic body and can be oriented in the direction of rocking of the arm 121 (see reference). Figure 1 They can deform elastically in the same direction. In other words, the pressing part 202 and the locking part 203 can deform in the direction of widening or narrowing.

[0077] The pressing part 202 is curved toward the arm 121 in a convex or peak-shaped manner, and its top 205 contacts the abutment part 107 of the valve stem 105. The top 205 contacts the lower surface of the abutment part 107 in the front-back direction at a position approximately the same as the central axis 210 of the valve stem 105. Since the valve stem 105 is located at the center of the abutment part 107, a notch 207 is provided to avoid the valve stem 105. The pressing part 202 applies a force (in the case of abutment part 107) to the abutment part 107. Figure 2 An upward force is applied to the receiving portion 209, which is located on the lower front surface of the arm 121, and the abutment portion 107 is located at the upper end of the valve stem 105. In other words, the abutment portion 107 of the valve stem 105 is clamped between the receiving portion 209 of the arm 121 and the pressing portion 202 of the connecting device 201. The pressing portion 202 is curved due to its convex or peak-shaped form, thus allowing for appropriate pressing force.

[0078] A locking part 203 is provided at the position of the clamping arm 121 opposite to the pressing part 202. Like the pressing part 202, the locking part 203 is convex or forms a peak shape, curving towards the arm 121, and its top 206 contacts the arm 121. The position where the top 206 of the locking part 203 abuts is approximately the same as the central axis 210 of the valve stem 105 in the front-rear direction. In other words, the top 206 of the locking part 203 is located symmetrically to the top 205 of the pressing part 202. The locking part 203 provides a force that presses the arm 121 against the valve stem (in... Figure 2 (In the middle, the force pointing downwards).

[0079] The pressing part 202 and the locking part 203 are connected to each other by the connecting part 204 in a side-view "C" shape. If it is presented in another way, the pressing part 202 and the locking part 203 are formed in a symmetrical shape with the connecting part 204 as the center, except for the notch 207.

[0080] The distance between the top 205 of the pressing part 202 and the top 206 of the locking part 203, when the connecting device 201 is not installed on the arm 121, is smaller than the vertical width of the arm 121. With this configuration, when the connecting device 201 is installed on the arm 121, the elasticity allows the force that presses the valve stem 105 against the arm 121 to be applied. In other words, the connecting device 201 swayably clamps and fixes the valve stem 105 relative to the arm 121. On the other hand, the distance between the end of the pressing part 202 and the end of the locking part 203, when the connecting device 201 is not installed on the arm 121, is larger than the vertical width of the arm 121. With this configuration, the connecting device 201 can be easily installed on the arm 121 (see reference). Figure 3When the connecting device 201 is fully installed on the arm 121, that is, when the top 205 of the pressing part 202 contacts the lower surface of the abutment part 107 at a position approximately the same as the central axis 210 of the valve stem 105, the connecting part 204 contacts the front end face of the arm 121.

[0081] (2) Loading and unloading methods

[0082] The following describes the method for installing and removing the valve stem 105 using the connecting device 201 of the first embodiment.

[0083] (Installation Method)

[0084] When installing the valve stem 105 onto the arm 121, firstly, the abutment portion 107 of the valve stem 105 moves toward the arm 121 until it abuts against the receiving portion 209 of the arm 121. Figure 3 (A)). In this state, when the connecting device 201 is moved toward the arm 121, the ends of the pressing part 202 and the locking part 203 contact the front end of the arm 121, and elastic deformation widens the gap between the pressing part 202 and the locking part 203. Figure 3 (B)). Upon further movement, the space between the pressing part 202 and the locking part 203 expands to the vertical width of the arm 121, and the abutting part 107 of the valve stem 105 is clamped and fixed between the receiving part 209 of the arm 121 and the pressing part 202 of the connecting device 201. When the connecting part 204 of the connecting device 201 moves to abut against the front end face of the arm 121, the installation is complete (see [reference]). Figure 2 (B)). To facilitate the installation of the connecting device 201, an inclined or circular shape that narrows as it faces the front end of the arm 121 may also be provided.

[0085] (Disassembly method)

[0086] When detaching the valve stem 105 from the arm 121, first, move the connecting device 201 forward to remove the force that presses the abutment portion 107 of the valve stem 105 against the receiving portion 209 of the arm 121. Figure 3 (C)). If the connecting device 201 is detached from the arm 121, the space between the pressing part 202 and the locking part 203 becomes narrower due to elasticity. Then, if the valve stem 105 is separated from the arm 121, the disassembly is completed. Figure 3 (D)).

[0087] (Effects and benefits)

[0088] In the connecting device 201 of the first embodiment described above, the arm 121 and the valve stem 105 are constantly subjected to a contacting force due to the connecting device 201. Therefore, even if the arm 121 is moved at high speed by the actuators (118, 119), there will be no problem of the valve stem 105 separating from the arm 121. Therefore, even if the arm 121 is driven at high speed by the actuators (118, 119), the valve stem 105 can follow its movement. Furthermore, when the actuators (118, 119) are actuated, since it is not necessary to overcome the resistance of the spring, the stroke amount required for the valve body 106 to move relative to the valve seat 108 can be ensured. In addition, since it is not necessary to drive the actuators (118, 119) to resist the force of the spring, the load on the actuators (118, 119) is small. Furthermore, since the arm 121 is fixed to the valve stem 105 by clamping the arm 121 only through the connecting device 201, it is easy to perform the more frequent installation and removal operations when the valve stem 105 is replaced for adjustment, maintenance, etc.

[0089] <Second Implementation>

[0090] The connection device 201 of the second embodiment has a different point at which the valve stem 105 is fixed above than the connection device 201 of the first embodiment.

[0091] In the connecting device 201 of the second embodiment, such as Figure 4 As shown, a receiving portion 209 is recessed on the upper front surface of the arm 121. A hole 211 is also provided, extending from the bottom surface of the receiving portion 209 to the lower surface of the arm 121. The valve stem 105 is inserted into this through hole 211 and fixed by the connecting device 201. While the valve stem 105 has an abutment portion 107 at its upper end as in the first embodiment, the point at which the circular surface is positioned on the side (lower surface) where the abutment portion 107 connects to the valve stem 105 differs from the first embodiment. In the second embodiment, by contacting the circular surface of the abutment portion 107 with the bottom surface of the receiving portion 209, changes in the contact position or angle due to rotation of the arm 121 can be tolerated.

[0092] Since the abutment portion 107 is on the upper surface side of the arm 121, the connecting device 201 is connected to the first embodiment ( Figure 2 In contrast, a pressing part 202 is provided on the upper side and a locking part 203 is provided on the lower side. Furthermore, a notch 208 is provided in the locking part 203 for the valve stem 105 to pass through. The installation and removal of the valve stem 105, except for the working part where the valve stem 105 is inserted from above, can be performed in roughly the same way as in the first embodiment.

[0093] Even in the connecting device 201 of the second embodiment, the same function as the connecting device 201 of the first embodiment can be achieved. In addition, since the abutting portion 107 of the valve stem 105 is supported by the storage portion 209 of the arm 121, it can prevent the valve stem 105 from falling off during loading and unloading.

[0094] <Third and Fourth Embodiments>

[0095] The connecting device 201 of the third and fourth embodiments differs from the connecting device 201 of the first and second embodiments in that it has a connecting member (screw) 213 that is inserted into the connecting portion 204.

[0096] exist Figure 5 In the connecting device 201 of the third embodiment shown in (A), a storage portion 209 is provided on the lower surface of the arm 121, and a screw hole 214 is provided above the front of the arm 121 in a manner that avoids the storage portion 209.

[0097] exist Figure 5 In the fourth embodiment of the connecting device 201 shown in (B), a storage part 209 is provided on the upper surface of the arm 121, and a screw hole 214 is provided below the front of the arm 121 in a manner that avoids the storage part 209.

[0098] In either the third or fourth embodiment, a hole 212 through which the connecting member 213 passes is provided at the connecting portion 204 of the connecting device 201 at a position corresponding to the screw hole 214. When installing the valve stem 105, similar to the first and second embodiments, after installing the connecting device 201 onto the arm 121, the connecting member 213 is installed and fixed. During disassembly, after removing the connecting member 213, similar to the first and second embodiments, the connecting device 201 is detached from the arm 121.

[0099] Even the connecting device 201 in the third and fourth embodiments can achieve the same function as the connecting device 201 in the first and second embodiments. In addition, by adding the connecting member 213, the valve stem 105 can be reliably fixed to the arm 121 compared to the case without the connecting member 213.

[0100] <Fifth to Eighth Implementation Methods>

[0101] The connecting device 201 of the fifth to eighth embodiments differs from the connecting device 201 of the first to fourth embodiments in that it has uneven points formed on the upper or lower surface of the arm 121.

[0102] In the connecting device 201 of the fifth embodiment, as Figure 6As shown in (A), in the configuration where the valve stem 105 is mounted from below, a recess 215 is provided on the upper surface of the arm 121, which follows the shape of the top 206 of the locking portion 203. In the fifth embodiment, during installation, the top 206 of the locking portion 203 is inserted into the recess 215, thereby limiting the offset of the connecting device 201, particularly the offset in the front-rear direction.

[0103] In the connecting device 201 of the sixth embodiment, as Figure 6 As shown in (B), in the configuration where the valve stem 105 is mounted from below, a protrusion 216 is provided on the upper surface of the arm 121, and a locking portion 203 is formed by bending into a "W" (or "M") shape along the shape of the protrusion 216. In the sixth embodiment, during installation, the recess 217 formed in the center of the "W" (or "M") shape of the locking portion 203 fits into the protrusion 216 of the arm 121, thereby limiting the offset of the connecting device 201, especially the offset in the front-rear direction.

[0104] In the connecting device 201 of the seventh embodiment, as Figure 6 As shown in (C), in the configuration where the valve stem 105 is mounted from above, a recess 215 is provided on the lower surface of the arm 121, which follows the shape of the top 206 of the locking portion 203. In the seventh embodiment, during installation, the top 206 of the locking portion 203 is inserted into the recess 215, thereby limiting the offset of the connecting device 201, particularly the offset in the front-rear direction.

[0105] In the connecting device 201 of the eighth embodiment, as Figure 6 As shown in (D), in the configuration where the valve stem 105 is mounted from above, a protrusion 216 is provided on the lower surface of the arm 121, and a locking portion 203 is formed by bending into a "W" (or "M") shape along the shape of the protrusion 216. In the eighth embodiment, during installation, the recess 217 formed in the center of the "W" (or "M") shape of the locking portion 203 fits into the protrusion 216 of the arm 121, thereby limiting the offset of the connecting device 201, especially the offset in the front-rear direction.

[0106] In the fifth to eighth embodiments, it can prevent the connecting device 201 from shifting or disengaging from the arm 121. Furthermore, since the feeling of the top 206 or recess 217 of the connecting device 201 being inserted into the recess 215 or protrusion 216 of the arm 121 can be transmitted to the operator, it is easy to confirm whether it is secure.

[0107] <Ninth to Twelfth Embodiments>

[0108] The connecting device 201 of the ninth to twelfth embodiments discloses the configuration of the connecting device 201 that is fixed to the arm 121 by the fixing part 218 and the connecting member 213.

[0109] Figure 7 The connecting device 201 of the ninth embodiment shown in (A) includes: a pressing portion 202, which is bent toward the arm 121 in a convex or mountain-shaped manner and contacts the abutment portion 107 of the valve stem 105 by means of its top 205; and a fixing portion 218, which is connected to the pressing portion 202 and is shaped along the end face of the arm 121. A screw hole 214 is provided in the arm 121 so as to avoid the storage portion 209, and a hole 212 through which the connecting member 213 passes is provided in the fixing portion 218 at a position corresponding to the screw hole 214. When the top 205 of the pressing portion 202 contacts the abutment portion 107 of the valve stem 105 and the fixing portion 218 contacts the end face of the arm 121, it can be fixed by installing the connecting member 213. A notch 207 is provided in the pressing portion 202 to avoid the valve stem 105.

[0110] exist Figure 7 The connecting device 201 of the tenth embodiment shown in (B) includes: a pressing portion 219, which is bent into a hook shape toward the arm 121 and has an end contact with the abutment portion 107 of the valve stem 105; and a fixing portion 218, which is connected to the pressing portion 219 and is shaped along the end face of the arm 121. A screw hole 214 is provided in the arm 121 to avoid the receiving portion 209, and a hole 212 through which the connecting member 213 passes is provided in the fixing portion 218 at a position corresponding to the screw hole 214. When the end of the hook-shaped pressing portion 219 is in contact with the abutment portion 107 of the valve stem 105 and the fixing portion 218 is in contact with the end face of the arm 121, it can be fixed by installing the connecting member 213. A notch 220 is provided in the pressing portion 219 to avoid the valve stem 105.

[0111] exist Figure 7 The connecting device 201 of the eleventh embodiment shown in (C) and in Figure 7 The connecting device 201 of the twelfth embodiment shown in (D) is connected to... Figure 4 Similarly, the second embodiment shown discloses a configuration in which the valve stem 105 is mounted from above.

[0112] The connecting device 201 of the ninth to twelfth embodiments described above, in the state where the connecting device 201 is fixed to the arm 121, is configured such that the top 205 of the pressing part 202 or the end of the hook-shaped pressing part 219 is located inside the surface of the arm 121, so that after the valve stem 105 is temporarily fixed to the arm 121, it can be fixed by the connecting member 213. Since it is a structure that fixes without clamping, it can be fixed with less force compared to the connecting device 201 of the first to eighth embodiments which have clamping structures. Furthermore, in the tenth embodiment ( Figure 7 (B) or the twelfth embodiment ( Figure 7 The hook-shaped pressing part 219 disclosed in (D) and the connecting device 201 in the first to fourth embodiments can also be replaced by the pressing part 202.

[0113] <Implementation Methods Thirteen to Sixteen>

[0114] The connecting device 201 of the thirteenth to sixteenth embodiments differs from the connecting device 201 of the ninth to twelfth embodiments in that it further includes a shaft portion 221.

[0115] In embodiments thirteen to sixteen, such as Figure 8 As shown, a shaft portion 221 is provided at the end opposite to the pressing portion (202, 219) of the fixing portion 218, so that the connecting device 201 is rotatable in the same direction R as the rocking direction of the arm 121. The shaft portion 221 is constructed by inserting a shaft rod through a through hole provided in the arm 121 and the connecting device 201, and fixing the shaft rod by a fixing member. When it is necessary to replace the valve stem 105, the valve stem 105 can be easily replaced by rotating the connecting member 213 in the loosening direction and rotating it around the shaft portion 221.

[0116] In the thirteenth and fourteenth embodiments, since the storage portion 209 is provided on the lower surface of the arm 121, the shaft portion 221 is provided near the upper surface of the arm 121.

[0117] In the fifteenth and sixteenth embodiments, since the storage portion 209 is provided on the upper surface of the arm 121, the shaft portion 221 is provided near the lower surface of the arm 121.

[0118] In the thirteenth to sixteenth embodiments described above, since the connecting device 201 is frequently connected to the arm 121, there is no possibility of losing the connecting device 201. Alternatively, the connecting member 213 can be configured to be unable to be detached from the fixing part 218; in this configuration, there is no need to worry about losing the connecting member 213.

[0119] <Seventeenth to Twentieth Embodiments>

[0120] The connecting device 201 of the seventeenth to twentieth embodiments differs from the connecting device 201 of the ninth to twelfth embodiments at the point where the connecting member 213 is connected to the upper or lower surface of the arm 121.

[0121] exist Figure 9The connecting device 201 of the seventeenth embodiment shown in (A) includes: a pressing part 202, which is bent into a convex shape (or a peak shape) toward the arm 121 and contacts the abutment part 107 of the valve stem 105 by means of its top 205; and a fixing part 218, which is connected to the pressing part 202 and is shaped along the lower surface of the arm 121. A notch 207 is provided in the pressing part 202 to avoid the valve stem 105. A screw hole 214 and a receiving part 209 are provided on the lower surface of the arm 121. A hole 212 through which the connecting member 213 passes is provided at the position corresponding to the screw hole 214 in the fixing part 218. When the top 205 of the pressing part 202 contacts the abutment part 107 of the valve stem 105 and the fixing part 218 contacts the lower surface of the arm 121, it can be fixed by installing the connecting member 213.

[0122] Figure 9 The connecting device 201 of the eighteenth embodiment shown in (B) includes a pressing part 219, which is bent into a hook shape toward the arm 121 and contacts the abutment part 107 of the valve stem 105 at its end. Regarding other configurations, it is similar to... Figure 9 The connecting device 201 of the seventeenth embodiment shown in (A) is the same.

[0123] exist Figure 9 The connecting device 201 of the nineteenth embodiment shown in (C) includes: a pressing part 202, which is bent into a convex shape (or a peak shape) toward the arm 121 and contacts the abutment part 107 of the valve stem 105 by means of its top 205; and a fixing part 218, which is connected to the pressing part 202 and is shaped along the upper surface of the arm 121. A receiving part 209 having a through hole 211 and a screw hole 214 are provided on the upper surface of the arm 121. A hole 212 through which the connecting member 213 passes is provided at the position corresponding to the fixing part 218 and the screw hole 214. When the valve stem 105 is inserted into the through hole 211, the top 205 of the pressing part 202 contacts the abutment part 107 of the valve stem 105, and the fixing part 218 contacts the upper surface of the arm 121, it can be fixed by installing the connecting member 213.

[0124] exist Figure 9 The connecting device 201 of the twentieth embodiment shown in (D) has a pressing portion 219 that is bent into a hook shape toward the arm 121 and contacts the abutment portion 107 of the valve stem 105 at its end. Other configurations are similar to those in… Figure 9 The connecting device 201 of the nineteenth embodiment shown in (C) is the same.

[0125] In the connecting device 201 of the seventeenth to twentieth embodiments described above, since the connecting member 213 is not connected to the front end face of the arm 121, the actual length of the arm 121 can be reduced.

[0126] <Implementation Methods 21 to 24>

[0127] The connecting device 201 of the twenty-first to twenty-fourth embodiments differs from the connecting device 201 of the seventeenth to twentieth embodiments in that it further includes a shaft portion 221.

[0128] In the connecting device 201 of the twenty-first to twenty-fourth embodiments, such as Figure 10 As shown, a shaft portion 221 is provided at the end opposite to the fixing portion 218 and the pressing portions (202, 219), so that the connecting device 201 is rotatable in the same direction R as the rocking direction of the arm 121. In the twenty-first to twenty-fourth embodiments, since the connecting device 201 is frequently connected to the arm 121, there is no possibility of losing the connecting device 201. Alternatively, the webbing member 213 can be made so that it cannot be detached from the fixing portion 218; in this state, there is no concern about losing the webbing member 213.

[0129] <Implementation Methods 25 to 28>

[0130] In embodiments 25 to 28, a connecting device 201 fixed to the arm 121 is disclosed.

[0131] like Figure 11 As shown in (A), the connecting device 201 of the twenty-fifth embodiment is configured to include a pair of pressing portions 202, which are formed from a plate-shaped elastic body viewed from the side as an "M". A groove 223 extending in the width direction of the arm 121 and a deep groove 222 recessed approximately at the center of the upper surface of the groove 223 are formed on the lower surface of the arm 121. The deep groove 222 functions as a first receiving portion for receiving the first abutting portion 224, and the groove 223 functions as a second receiving portion for receiving the second abutting portion 225.

[0132] A pair of pressing portions 202 are provided in the groove 223 of the crossbar. Two identical pressing portions 202 are arranged parallel to each other with a gap in the width direction of the arm 121. The pressing portions 202 are fixed to the lower surface of the arm 121 by fixing bridge portions 230 extending from both ends. The valve stem 105 has: a first abutment portion 224 located at the upper end and having a circular surface; and a rod-shaped second abutment portion 225 protruding to both sides from the central axis 210 of the valve stem 105 below the first abutment portion 224. In other words, the second abutment portion 225 is configured to protrude horizontally from the valve stem 105, and a cross shape is formed between the valve stem 105 and the second abutment portion 225. The length of the second abutment portion 225 is shorter than the width of the arm 121 and the gap between the grooves 223, but longer than the gap between the parallel connecting devices 201.

[0133] To install the valve stem 105 onto the arm 121, firstly, with the extension direction of the second abutment portion 225 of the valve stem 105 aligned with the extension directions of the two pressing portions (202, 202), the first abutment portion 224 of the valve stem 105 is positioned to abut against the deep groove 222 of the arm 121. In other words, the second abutment portion 225 of the valve stem 105 is moved between the two pressing portions (202, 202). Next, while maintaining the first abutment portion 224 of the valve stem 105 abutting against the deep groove 222 of the arm 121, the valve stem 105 is rotated about its central axis 120. Then, the second abutment portion 225, while elastically deforming the pressing portion 202 in a downward expansion manner, moves past the "M"-shaped protrusion 227 and engages with the "M"-shaped recess 226. If the second abutment portion 225 is inserted into the "M"-shaped recess 226, the pressing portion 202 exerts an elastic force to press the valve stem 105 upward, thereby fixing the valve stem 105 to the arm 121. Thus, in the connecting device 201 of the twenty-fifth embodiment, fixation can be achieved by simply inserting the valve stem 105.

[0134] In the connecting device 201 of the twenty-sixth embodiment, such as Figure 11 As shown in (B), the connecting device 201 is provided on the upper surface of the arm 121. The difference from the twenty-fifth embodiment is that the arm 121 does not have a deep groove 222, but instead has a hole 211 through which the valve stem 105 is inserted. Since the valve stem 105 is inserted into the groove 223 from above, it is unnecessary to provide a first abutment portion 224 with a circular shape on the valve stem 105.

[0135] In the connecting device 201 of the twenty-seventh embodiment, as Figure 11 As shown in (C), two pressing parts (202, 202) are arranged in a direction orthogonal to the long side direction of arm 121. In other words, in the twenty-seventh embodiment, the arrangement direction of the two pressing parts (202, 202) is perpendicular to the direction of the long side of arm 121. Figure 11 The connecting device 201 of the twenty-fifth embodiment shown in (A) is 90 degrees out of phase.

[0136] In the connecting device 201 of the twenty-eighth embodiment, such as Figure 11 As shown in (D), two pressing parts (202, 202) are also arranged in a direction orthogonal to the long side direction of arm 121. In other words, in the twenty-eighth embodiment, the arrangement direction of the two pressing parts (202, 202) is perpendicular to the direction of the long side of arm 121. Figure 11 The connecting device 201 of the twenty-sixth embodiment shown in (B) is 90 degrees out of phase.

[0137] In the twenty-sixth to twenty-eighth embodiments described above, the same as in the twenty-fifth embodiment, the valve can be fixed by simply rotating the valve stem 105.

[0138] <Implementation Methods 29 to 32>

[0139] like Figure 12 As shown in (A), the connecting device 201 of the twenty-ninth embodiment is constructed by fixing bridge portions 231a and 231b, which are formed by cylindrical elastic bodies provided on the lower surface of the arm 121. A groove 223 extending in the short side direction (width direction) of the arm 121 is provided on the lower surface of the arm 121, and the fixing bridge portions 231a and 231b are provided horizontally across the groove 223. Two identical members are provided parallel to each other in the short side direction (width direction) of the arm 121, spaced apart, and one end is fixed by a fixing member 232a, while the other end is fixed by a fixing member 232b. The valve stem 105 has an abutment portion 107 at its upper end with a diameter larger than that of the valve stem 105. The upper and lower surfaces of the abutment portion 107 are respectively provided with circular surfaces. The diameter of the abutment portion 107 is relatively small due to the width W of the arm 121 and the opening width of the groove 223, so it can be accommodated within the groove 223. In other words, the groove 223 corresponds to the accommodating portion in the first embodiment.

[0140] Furthermore, the interval between the two fixing bridge portions 231a and 231b is set to be slightly smaller than the diameter of the abutment portion 107. For example, there are cases where the diameter of the abutment portion 107 is approximately equal to the distance between the centers of the two fixing bridge portions 231a and 231b, or the diameter of the abutment portion 107 is approximately equal to the distance between the outermost edges of the two fixing bridge portions 231a and 231b. Additionally, the interval between the two fixing bridge portions 231a and 231b and the upper surface of the groove 223 is smaller than the thickness of the abutment portion 107 of the valve stem 105. For example, an example is a reduction in the thickness of the curved surface (raised portion) of the abutment portion 107.

[0141] The valve stem 105 is installed on the arm 121 as follows: If the valve stem 105 is brought closer to the arm from its initial contact with the upper surface of the abutment portion 107 of the valve stem 105 against the two fixing bridge portions 231a, 231b, the two fixing bridge portions 231a, 231b elastically deform along the curved surface of the upper surface of the abutment portion 107, expanding in the direction of arm width. If the deformation reaches the diameter of the abutment portion 107, in other words, if the deformation extends to the end of the curved surface of the upper surface of the abutment portion 107, the abutment portion 107 of the valve stem 105, through the two fixing bridge portions 231a, 231b, contacts the upper surface of the groove 223. At this point, the two fixing bridge portions 231a, 231b return to their original shape along the curved surface of the lower surface of the abutment portion 107. Since the distance between the two fixing bridge portions 231a, 231b and the upper surface of the groove 223 is set to be less than the thickness of the abutment portion 107, the valve stem 105 is fixed to the arm 121 by the upward pressing force exerted by the two fixing bridge portions 231a, 231b on the abutment portion 107. Thus, the valve stem 105 can be fixed to the arm 121 with the simple operation of pressing the abutment portion 107 of the valve stem 105 into the connecting device 201.

[0142] In the connecting device 201 of the thirtieth embodiment, as Figure 12 As shown in (B), the connecting device 201 is disposed on the upper surface of the arm 121. It is connected to... Figure 12 The difference in the twenty-ninth embodiment shown in (A) is that a hole 211 through which the valve stem 105 is inserted is provided in the arm 121. In other words, the valve stem 105 is installed by inserting it into a groove 223 provided on the upper surface of the arm 121. In the thirtieth embodiment, it is also fixed to the arm 121 by simply inserting the valve stem 105 into the connecting device 201.

[0143] In the connecting device 201 of the thirty-first embodiment, as Figure 12 As shown in (C), the fixing bridge portions 231a and 231b, which are mounted across the groove 223, are arranged in the short side direction of the arm 121. In other words, the connecting device 201 of the thirty-first embodiment, and the... Figure 12 In the twenty-ninth embodiment shown in (A), the connecting device 201 is 90 degrees apart in the directions in which the fixing bridge portions 231a and 231b extend. In the thirty-first embodiment, the arm 121 can also be fixed by simply pressing the valve stem 105 into the connecting device 201.

[0144] exist Figure 12 The connecting device 201 of the thirty-second embodiment shown in (D) is also similar to that of the thirty-first embodiment, with the fixing bridge portions 231a and 231b, which are mounted transversely on the groove 223, arranged in the short side direction of the arm 121. In other words, the connecting device 201 of the thirty-second embodiment, like that of the thirty-first embodiment, has fixing bridge portions 231a and 231b arranged transversely on the groove 223 in the short side direction of the arm 121. Figure 12 In the thirtieth embodiment shown in (B), the connecting device 201 is 90 degrees apart in the directions in which the fixing bridge portions 231a and 231b extend. In the thirty-second embodiment, the arm 121 can also be fixed by simply inserting the valve stem 105 into the connecting device 201.

[0145] <Thirty-third Implementation>

[0146] Up to the thirty-second embodiment, although it is disclosed that the abutment portion 107 of the valve stem 105 is wider than the width of the valve stem 105, it is not necessary to make the abutment portion 107 wider than the width of the central portion of the valve stem 105.

[0147] like Figure 13 As shown, the valve stem 105 of the connecting device 201 in the thirty-third embodiment has: an abutment portion 107, which has the same diameter as the valve stem 105; and a reduced diameter portion 228, which is disposed below the abutment portion 107.

[0148] The upper surface of the abutment portion 107 is formed as a circular surface so that it can rotatably rotate relative to the storage portion 209 when the arm 121 rotates. The reduced diameter portion 228 is configured to have a smaller diameter than the abutment portion 107, and the connection portion between the reduced diameter portion 228 and the abutment portion 107 forms a stepped portion 229. The shape of the reduced diameter portion 228 is not limited to the cylindrical shape shown, as long as it can engage with the pressing portion 219, for example, it can be a groove or a through hole. The reduced diameter portion 228 is formed at a predetermined distance from the lower surface of the arm 121 when the abutment portion 107 abuts against the storage portion 209 of the arm 121. The connecting device 201 includes a pressing portion 219 that bends into a hook shape toward the arm 121. By arranging the connecting device 201 such that the end of the pressing portion 219 abuts against the stepped portion 229 of the valve stem 105, the valve stem 105 is fixed to the arm 121. Here, a notch for receiving the reduced diameter portion 228 may also be provided in the pressing portion 219. Since it is a structure that does not rely on clamping for fixation, it can be fixed with less force compared to the connecting device 201 of the first to eighth embodiments which have a clamping structure.

[0149] The storage portion 209 of the arm 121 is rotatably sized to accommodate the abutment portion 107 of the valve stem 105. The valve stem 105 can be mounted to the arm 121 with the abutment portion 107 of the valve stem 105 abutting against the storage portion 209 of the arm 121, while the end of the hook-shaped pressing portion 219 is hooked onto the stepped portion 229 of the valve stem 105, and the locking portion 203 moves toward the upper surface of the arm 121. This configuration is effective for situations where the arm 121 is small and the size of the storage portion 209 cannot be adequately ensured, or where it is desirable to reduce the weight of the valve stem 105.

[0150] Furthermore, in the configuration of this embodiment, a combination of the third and fourth embodiments can be adopted ( Figure 5 The composition of the connecting member 213, and the fifth to eighth embodiments ( Figure 6 The upper or lower surface of arm 121 is provided with a concave-convex structure, or in embodiments thirteen to sixteenth ( Figure 8 The structure of the shaft portion 221 and the connecting component 213.

[0151] While preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the embodiments described above. Various changes and modifications can be made without departing from the technical concept of the present invention, and such changes or modifications are also included within the technical scope of the present invention.

[0152] Symbol Explanation

[0153] 101: Dispensing device

[0154] 102: Valve device

[0155] 103: Valve Actuator

[0156] 104: Base components

[0157] 105: Valve stem

[0158] 106: Valve body

[0159] 107: Contact part

[0160] 108: Valve seat

[0161] 109: Through hole (valve seat)

[0162] 110: Nozzle

[0163] 111: Spit out

[0164] 112: Liquid Chamber

[0165] 113: Through hole

[0166] 114: Bushing

[0167] 115: Sealing components

[0168] 116: Liquid Inlet

[0169] 117: Liquid Materials

[0170] 118: First Actuator

[0171] 119: Second Actuator

[0172] 120: Fastener

[0173] 121: Arm

[0174] 122: Direction of arm movement (top)

[0175] 123: Direction of arm movement (below)

[0176] 124: Cover

[0177] 201: Connecting device

[0178] 202: Pressing part

[0179] 203: Locking part

[0180] 204: Connecting part

[0181] 205: Top (pressing part)

[0182] 206: Top (locking part)

[0183] 207: Notch (pressing part)

[0184] 208: Notch (Closing Part)

[0185] 209: Storage Department

[0186] 210: Central axis of valve stem

[0187] 211: Through hole (arm)

[0188] 212: Through hole (connecting device)

[0189] 213: Structural components

[0190] 214: Screw hole

[0191] 215: concave part (arm)

[0192] 216:Protrusion (arm)

[0193] 217: Recess (Locking Part)

[0194] 218: Fixing part

[0195] 219: (Hook-shaped) pressing part

[0196] 220: Notch (hook-shaped pressing part)

[0197] 221: Shaft

[0198] 222: Deep Groove (First Storage Section)

[0199] 223: Groove (Second Storage Section)

[0200] 224: First contact section

[0201] 225: Second contact section

[0202] 226: Recess (pressing part)

[0203] 227: Protrusion (pressing part)

[0204] 228: Reduced diameter section (smaller diameter section)

[0205] 229: Stepped Section

[0206] 230: Fixed bridge (corrugated plate)

[0207] 231: Fixed bridge section (round rod)

[0208] 232: Fastener

[0209] R: Rotation direction of the connecting device

Claims

1. A liquid material dispensing device, characterized in that, have: A valve stem having a valve body and an abutment portion disposed at its front end; A liquid chamber, which allows the valve body to move forward and backward; A nozzle that communicates with the liquid chamber; A valve seat having an orifice connecting the liquid chamber and the nozzle; An arm that detachably abuts against the valve stem; and A valve actuation device that moves the valve body forward or backward relative to the valve seat by rotating the arm. The liquid material dispensing device includes: A connecting device is mounted and fixed to the arm, and connects the valve stem to the arm. The connecting device includes a pressing portion that presses the abutting portion against the arm. The arm has a receiving portion in which the valve stem abuts. When the arm is rotated, the abutment portion of the valve stem rotates relative to the receiving portion.

2. The liquid material dispensing device as described in claim 1, characterized in that, The pressing part is composed of a plate-shaped elastomer.

3. The liquid material dispensing device as described in claim 1 or 2, characterized in that, The storage portion is formed on the upper surface of the arm. The arm has a through hole through which the valve stem is inserted in the storage section. The abutting portion is wider than the valve stem, and the upper surface of the abutting portion is flat, while the lower surface is circular.

4. The liquid material dispensing device as described in claim 1 or 2, characterized in that, The arm's storage portion is formed on the lower surface of the arm. The abutting portion is wider than the valve stem, and the lower surface of the abutting portion is flat, while the upper surface is circular.

5. The liquid material dispensing device as described in claim 4, characterized in that, The pressing part has a notch in which the valve stem is disposed.

6. The liquid material dispensing device as described in claim 1, characterized in that, The connecting device further includes: a locking portion extending in the same direction as the pressing portion; and a connecting portion connecting the locking portion and the pressing portion, thereby clamping the arm portion through the locking portion and the pressing portion.

7. The liquid material dispensing device as described in claim 6, characterized in that, The locking portion has a top that abuts against the arm portion.

8. The liquid material dispensing device as described in claim 7, characterized in that, The arm has a recess that receives the top of the locking part.

9. The liquid material dispensing device as described in claim 6, characterized in that, The locking portion has multiple tops that abut against the arm portion and a recess located between the multiple tops. The arm portion has a protrusion that is housed within the recess of the locking portion.

10. The liquid material dispensing device as described in claim 6, characterized in that, The pressing part has abutting against the top of the abutting part.

11. The liquid material dispensing device as claimed in any one of claims 6 to 10, characterized in that, It includes a connecting member for connecting the connecting device to the arm. The connecting part has a hole through which the connecting member is inserted.

12. The liquid material dispensing device according to any one of claims 1 to 3, characterized in that, The connecting device includes: a fixing part that is continuous with the pressing part; and a connecting member that fixes the fixing part to the arm.

13. The liquid material dispensing device as described in claim 12, characterized in that, The fixing part extends in a direction substantially orthogonal to the pressing part and is fixed to the front end of the arm by a webbing member.

14. The liquid material dispensing device as described in claim 12, characterized in that, The webbing component is fixed to the upper or lower surface of the arm.

15. The liquid material dispensing device as described in claim 12, characterized in that, The pressing part has a top that abuts against the abutting part.

16. The liquid material dispensing device as described in claim 15, characterized in that, The top of the pressing part is configured as an end.

17. The liquid material dispensing device as described in claim 12, characterized in that, It is equipped with a shaft portion for rotatably fixing the connecting device to the arm.

18. The liquid material dispensing device as described in claim 1 or 2, characterized in that, The pressing part is composed of a pair of bridge parts disposed on the arm.

19. The liquid material dispensing device as described in claim 18, characterized in that, The pressing part is a plate-shaped elastic body with a concave portion. The abutting portion consists of a first abutting portion that abuts against the arm and a second abutting portion that is provided in a manner that protrudes from the valve stem and is pressed by the recesses of the pair of bridge portions.

20. The liquid material dispensing device as described in claim 18, characterized in that, The pressing part is a rod-shaped elastic body. The abutting portion has a circular upper surface and a circular lower surface.

21. The liquid material dispensing device according to any one of claims 1 to 3, characterized in that, The valve stem has a reduced diameter portion that forms a stepped section. The pressing part presses against the stepped part.

22. The liquid material dispensing device according to any one of claims 1 to 3, characterized in that, The valve driving device is configured with a piezoelectric actuator.

23. The liquid material dispensing device according to any one of claims 1 to 3, characterized in that, The valve body is moved forward by the valve drive device, thereby ejecting a drop of liquid from the nozzle.

Images