WO2001040648A1

WO2001040648A1 - Cam device, automatic chemical feed device with the cam device, and tray mounting structure of the automatic chemical feed device

Info

Publication number: WO2001040648A1
Application number: PCT/JP2000/006125
Authority: WO
Inventors: Alikhan Abulkassov; Tetsuya Nomoto
Original assignee: Saraya Co., Ltd.
Priority date: 1999-11-30
Filing date: 2000-09-08
Publication date: 2001-06-07
Also published as: TW475030B; JP2001153036A

Abstract

An automatic chemical feed device automatically feeding chemical contained in a chemical container with a manual pump mechanism by detecting the operating action of a user with a sensor to operate a pump drive mechanism, the pump drive mechanism comprising a cam device having a cam plate driven by a motor and a cam follower member performing reciprocating linear motion in conjunction with the rotating motion of the cam plate, wherein a specified portion at the peripheral edge of the cam plate is formed with a spiral curve specified by an equation τ= a(4x)υτ is radius vector, υ is declination, and a is constant) in two-dimensional polar coordinates having an origin at the rotating center of the cam plate, whereby, because such a cam device capable of maintaining the moving speed of the linear motion at a constant when the rotating motion is converted to the linear motion is assembled, the status of delivery of chemical during the period of chemical delivery can be uniformed and stabilized.

Description

TECHNICAL FIELD The present invention relates to an automatic chemical liquid supply device equipped with a power supply device and a cam device, and a tray mounting structure of the automatic chemical liquid supply device.

The present invention relates to a cam device including a cam plate and a cam follower member that performs a linear motion in conjunction with the rotation of the cam plate, an automatic chemical solution supply device incorporating the cam device, and a tray mounting structure of the automatic chemical solution supply device. About. Background art

Conventionally, as a supply device (so-called dispenser) for supplying a chemical solution such as a lab solution or a disinfectant solution for cleaning or disinfecting a hand or a fingertip, a use operation of a user (user), specifically, 2. Description of the Related Art There is known an automatic chemical liquid supply device that detects a user's hand reaching operation and the like and can automatically supply a chemical liquid.

For example, Japanese Patent Application Laid-Open No. 9-14129 / 29 discloses a chemical solution container provided with a manual pump mechanism widely used in homes and the like for the quantitative supply of stone liquid and the like, and the manual pump mechanism described above. A crank-type pump driving mechanism to be driven, and a detection sensor for detecting a user's use operation by sensing human hands and the like, and the manual pump mechanism is driven according to a detection signal from the detection sensor, There is disclosed a configuration in which a chemical solution in a chemical solution container can be automatically supplied.

By adopting such a configuration, the supply of the chemical solution can be automated by driving the pump mechanism in a non-contact manner, and a more clean and sanitary supply of the chemical solution can be performed. In addition, the replenishment of chemicals and the change of the type can be easily performed by replacing the entire container, and the risk of inconveniences such as contamination by foreign matter and contamination during the replacement is minimized. Can be. Further, the power supply to the pump drive mechanism and the detection sensor for driving the pump mechanism of the chemical solution container is performed by a battery (dry battery) built in the device, so that the chemical solution supply device can be easily moved. Thus, the device can be installed at a desired place. By the way, as is well known, the pump mechanism of the chemical solution container as described above is attached to a sealing cap for sealing the opening of the container, sucks and discharges the chemical solution inserted into the container and stored therein. A suction pipe, a discharge nozzle for discharging the sucked chemical solution to the outside, and an operation unit (pressing head) in which an inlet side of the discharge nozzle is connected to an outlet side of the suction pipe. By pushing the pressing head substantially along the axis of the outlet side portion of the suction pipe, a certain amount of the chemical solution is discharged for each pushing operation.

The automatic chemical liquid supply device automatically performs the pressing operation of the pressing head. For example, in the device disclosed in the above-mentioned conventional publication, a crank mechanism connected to an electric motor is provided to perform the pressing operation. The push-in operation of the pad is automated.

The inventor of the present invention has been conducting research and development for further improving the performance of an automatic chemical liquid supply device incorporating such a chemical liquid container with a pump mechanism, and has been examining the state of discharge of the chemical liquid from a discharge nozzle. It was found that it is important to maintain the pushing speed when pushing the pushing head of the pump mechanism as constant as possible during the pushing stroke in order to make the pump head uniform and stable during the period. .

In particular, when the chemical solution in the container is ejected in the form of a mist or foam (so-called spray pump or forming pump), if the pushing speed fluctuates more than a certain degree during the stroke, the spray angle is too small. If the chemical does not spread sufficiently, or the particle size of the foam is too coarse to produce a sufficiently fine foam, the spray of the chemical does not become a good mist or foam, and in extreme cases, Partially dripping into a liquid makes it difficult to disinfect or wash hands, and also significantly impairs usability.

Therefore, when using such a pump, it is more important to keep the pushing speed of the pressing head as constant as possible to maintain a good discharge state. The quality of this discharge state is usually evaluated visually, but the state of the latter half of the push-in stroke, especially the state at the end, has a large effect on this evaluation. Therefore, it is particularly important to keep the pushing speed in the latter half of the stroke including the vicinity of the discharge end point constant.

In the automatic chemical liquid supply device disclosed in the above-mentioned conventional publication, the driving operation of the pump mechanism (the pressing operation of the pressing head) is performed by a crank mechanism connected to an electric motor. However, in this case, the rotational motion of the electric motor is caused by engaging the base end of the crank with a projection provided near the periphery of the disk rotated by the electric motor via the gear mechanism. Is converted into vertical reciprocating motion of the crank, and the pump mechanism is driven and operated at the tip of the crank. The movement of the tip of the crank during the pushing stroke is such that the rotation speed of the motor is constant. If there is, it will be performed at irregular speed.

Therefore, the pushing speed at which the pushing head of the pump mechanism is pushed in varies greatly between the start and the end of the stroke, and the state of discharge of the chemical solution from the discharge nozzle is changed during the discharge period. It is difficult to achieve uniform and stable.

In addition, the driving operation of the pump mechanism is performed not by the crank mechanism as described above, but by a cam plate that is rotationally driven by a motor, and a cam follower member that slides on a peripheral portion of the cam plate to perform a linear reciprocating motion. It is also conceivable to use a cam device having the following.

In this case, for example, as shown in FIG. 32, the cam plate 144 has a configuration in which the peripheral shape is a simple circle, and the rotation axis 144 s is offset (eccentric) from the center of the circle. Is the most common.

However, as shown in FIG. 33, in this case as well, if the rotation speed of the cam plate 144 is constant, the linear movement operation of the cam follower during the stroke period is not uniform. When this cam plate 144 is used, the cam follower performs the pushing operation while the cam plate 144 rotates 180 degrees, and returns while rotating the remaining 180 degrees. The operation will be performed.

Such a cam device is affected by a spring mounted in a manual pump mechanism of a chemical solution container when actually used in an automatic chemical solution supply device. That is, the spring exerts a reaction force on the pump pushing operation, and the spring force assists the return operation. For this reason, as in the case of the above-mentioned circular eccentric cam, if the pushing operation is performed only by rotating the cam plate 144 by 180 degrees, the load increases, and the driving force is applied to the cam plate 144. This has a negative effect on the life of the motor and its reduction gear. In addition, when a dry battery is used as the power supply, Life is also shortened.

The operating characteristics of the circular eccentric cams shown in FIGS. 32 and 33 will be described later in further detail.

By the way, a so-called Archimedes spiral curve defined by the following formula in polar coordinates as one kind of a spiral two-dimensional curve that can be drawn with a geometric regularity is conventionally known. . In this equation, the symbol r is the radius vector, Θ is the argument, and a is a constant.

r = a Θ… ①

In the Archimedes spiral curve expressed by this formula, the moving speed V (= dr / dΘ) with respect to the angle change of the point moving on the curve is constant (v = a).

In other words, by applying this Archimedes spiral curve to the peripheral shape of the cam plate, if the rotational speed of the cam plate is constant, the rotational movement of the cam plate is converted into the linear movement of the cam driven member that slides on the peripheral edge. This makes it possible to keep the moving speed constant.

In addition, when the driving operation of the manual pump mechanism of the automatic chemical liquid supply device is performed by a motor driven cam device, the cam plate is rotated so that the rotation angle of the cam plate corresponding to the pump pushing operation period becomes larger than 180 degrees. By setting the peripheral shape of the drive motor, the load on the drive motor and its reduction gear can be reduced, the life can be improved, and the current consumption can be reduced.

In addition, the above-mentioned automatic chemical liquid supply device may be a table-mounting type which is used by being mounted on a flat place such as a table, but a wall-mounting type which is fixed to a vertical wall is not rare. In the case of the wall-mounted type, a tray is provided at the lower end of the device case so as to protrude vertically forward with respect to the case, in order to improve the convenience of the user.

Such trays need to be cleaned or disinfected on a regular basis, for example, to maintain sanitary conditions.For thorough cleaning or disinfection, remove the tray from the equipment case. It is desirable. However, conventionally, to remove this tray, the device itself must be removed from the vertical wall and the tray must be removed from the device case, and cleaning and disinfecting the tray is troublesome and troublesome. Was difficult.

The present invention has been made in view of the above problems, and focuses on the characteristics of the Archimedes spiral curve to convert the rotational motion of a cam plate into a linear motion of a cam driven member that slides on a peripheral edge of the cam plate. To provide a cam device capable of keeping the moving speed of the linear motion constant at the time of injection, and to make the ejection state of the chemical solution uniform and stable during the ejection period by incorporating the cam device. To provide an automatic chemical liquid supply device that can reduce the load on the drive motor and, consequently, reduce the current consumption. Furthermore, an automatic chemical liquid supply device that can easily attach and detach the tray The purpose of the present invention is to provide a tray mounting structure. Disclosure of the invention

In order to achieve the above object, a cam device according to a first aspect of the present invention includes a cam plate having a predetermined peripheral shape, a rotation center set at a predetermined portion, and a sliding contact with the peripheral portion of the cam plate. A cam driven member having a sliding portion to be obtained, and a peripheral portion of the cam plate provided on the assumption that the driven member performs a linear motion in conjunction with the rotation of the cam plate. Is a two-dimensional polar coordinate display with the rotation center as the origin, and is formed by a spiral curve defined by the equation r = a6 (r is radial, Θ is declination, and a is a constant) It is characterized by.

Also, an automatic chemical solution supply device according to the second invention of the present application includes a chemical solution container having a manual pump mechanism, a pump drive mechanism for driving the manual pump mechanism, and electric power for supplying drive power to the pump drive mechanism. A supply unit, a detection sensor for detecting a user's use operation, and a control unit for controlling the operation of the pump drive mechanism in accordance with an output signal from the detection sensor, wherein the detection sensor detects the user's use operation In such a case, the manual pump mechanism is driven by the pump driving mechanism, and an automatic chemical liquid supply device capable of automatically supplying the chemical liquid in the chemical liquid container is assumed. An electric motor connected to the control unit is provided, and a cam plate connected to an output shaft of the electric motor is slidably contactable with a peripheral portion of the cam plate. To perform the setting by reciprocating linear motion in conjunction with the rotation of the cam plate A cam device having a cam driven member for driving the manual pump mechanism, wherein the predetermined portion of the peripheral shape of the cam plate is expressed in two-dimensional polar coordinates with the center of rotation of the cam plate as an origin, and an equation r = a It is characterized by being formed by a spiral curve defined by Θ (r is radial, Θ is declination, and a is a constant).

Further, in the automatic chemical liquid supply device according to a third invention of the present application, in the second invention, the manual pump mechanism is configured to have a pushing operation in conjunction with a reciprocating linear operation of a cam driven member accompanying rotation of the cam plate. And a return operation, and a cam plate peripheral portion corresponding to a region including at least a substantially middle to a substantially end point in a pushing stroke of the head portion is formed by the spiral curve. It is characterized by

Further, in the automatic chemical liquid supply device according to a fourth invention of the present application, in the second invention, the manual pump mechanism is interlocked with a reciprocating linear operation of a cam driven member accompanying rotation of the cam plate. And a head portion for performing a pushing operation and a returning operation, and a rotation angle of the cam plate corresponding to a pushing operation period of the head portion is larger than 180 degrees. The present invention is characterized in that the peripheral shape of the cam plate is set.

Further, according to a fifth aspect of the present invention, there is provided the automatic chemical liquid supply device according to any one of the second to fourth aspects, wherein the cam driven member performs a vertical linear motion. When the rotation of the plate is stopped, a fall prevention mechanism for preventing the cam driven member from falling due to its own weight is provided.

Further, the tray mounting structure of the automatic chemical liquid supply device according to the sixth invention of the present application includes: a chemical liquid container having a manual pump mechanism; a pump driving mechanism for driving the manual pump mechanism; and a driving mechanism for driving the pump driving mechanism. A power supply unit for supplying electric power, a detection sensor for detecting a user's use operation, and a control unit for controlling the operation of the pump driving mechanism according to an output signal from the detection sensor; When the user detects the use operation of the user, the manual pump mechanism is driven by the pump drive mechanism, and the bottom side of the case body of the automatic chemical liquid supply device capable of automatically supplying the chemical liquid in the chemical liquid container. A tray that detachably attaches a tray that projects almost vertically to the front A lay mounting structure, wherein a mounting surface to the bottom surface side of the case body is provided at a rear portion of the tray, a base extending substantially vertically upward at a predetermined portion of the mounting surface, and a base substantially extending from a front end side of the base. A locking hook having a locking portion projecting vertically is provided, while an intermediate vertical wall having a slot portion through which the locking portion of the locking hook can be inserted is provided on the bottom side of the case body. When the tray is mounted on the bottom side of the case body, there are provided front and rear vertical walls which are located in front of and in the middle of the middle and are longer in the upper and lower directions than the base of the locking hook, respectively. The locking portion of the locking hook is inserted into the slot portion of the intermediate vertical wall and locked, and the front and rear vertical walls have their ends facing the mounting surface of the tray. It is characterized by having.

Further, the tray mounting structure for an automatic chemical liquid supply device according to the seventh invention of the present application is the above-mentioned sixth invention, wherein the predetermined height projecting vertically in the middle of the locking portion of the locking hook is provided. Are provided.

According to the first aspect of the present invention, the predetermined portion of the peripheral shape of the cam plate is expressed in two-dimensional polar coordinates with the origin being the rotation center of the cam plate, and the equation r = a Θ (where r is the radial radius and Θ is the Since the angle is defined by a spiral curve (a so-called Archimedes spiral curve) defined by a constant (a is a constant), in the above-mentioned predetermined portion of the peripheral portion of the cam plate, a point moving on the curve forming the peripheral shape is used. Is constant with respect to the angle change of

(v = dr / d6 = a), it is possible to keep the moving speed constant when converting the rotational motion of the cam plate into the linear motion of the cam driven member.

Further, according to the second invention of the present application, the predetermined portion of the peripheral shape of the cam plate incorporated in the pump drive mechanism of the automatic chemical liquid supply device is displayed in two-dimensional polar coordinates with the rotation center of the cam plate as the origin, Since it is formed by a spiral curve (so-called Archimedes spiral curve) defined by the equation r == a Θ (r is radial, Θ is declination, and a is a constant), the cam plate peripheral edge For the above-mentioned predetermined portion, the moving speed V with respect to the angle change of the point moving on the curve forming the peripheral shape becomes constant (v = dr Z d 0 = a), and the rotational movement of the cam plate is changed to the reciprocating straight line of the cam driven member. It becomes possible to keep the moving speed constant when converting to motion.

Thereby, the operation speed when the manual pump mechanism of the chemical liquid container is operated via the cam driven member in a range corresponding to the predetermined portion of the peripheral portion of the cam plate. Is maintained constant, and the discharge state of the chemical solution can be made uniform and stable. Further, according to the third invention of the present application, basically, the same effects as those of the second invention can be obtained. In particular, a cam plate peripheral portion corresponding to a range including at least a substantially middle to a substantially end point in a pushing stroke of a head portion that performs a pushing operation and a returning operation in conjunction with the reciprocating linear operation of the cam follower member. It is formed by the Archimedes spiral curve described above. Therefore, in the above range, which is important for evaluating the discharge state of the chemical solution, the moving speed when converting the rotational motion of the cam plate into the reciprocating linear motion of the cam driven member is kept constant, whereby the pushing speed of the head portion is reduced. Is maintained constant, and the discharge state of the chemical solution can be made uniform and stable. Further, according to the fourth invention of the present application, basically the same effects as those of the second invention can be obtained. In addition, the rotation angle of the cam plate corresponding to the pushing operation period of the head portion, which performs the pushing operation and the returning operation in conjunction with the reciprocating linear operation of the cam driven member, is larger than 180 degrees. Since the peripheral shape of the cam plate is set so that the same work is performed at a larger rotation angle as compared with a conventional general eccentric circular cam plate, the driving force is applied to the cam plate. The applied motor load and current consumption can be reduced.

Further, according to the fifth invention of the present application, basically, the same effect as any one of the second to fourth inventions can be obtained. In addition, the cam follower performs a linear motion in the vertical direction, and a fall prevention mechanism for preventing the cam follower from falling due to its own weight when the rotation of the cam plate is stopped. The cam follower does not fall by its own weight even when the rotation of the cam plate is stopped, for example, when replacing the chemical solution container, etc.

Further, according to the sixth invention of the present application, the mounting surface at the rear portion of the tray has a base extending substantially vertically upward and substantially vertically rearward from the front end side of the base (that is, with respect to the mounting surface). (Approximately parallel to each other). A locking hook having a locking portion that protrudes is provided. When the tray is mounted on the bottom side of the case body, a locking hook provided on the mounting surface of the tray is provided. The stopper is inserted into the slot of the intermediate vertical wall provided on the bottom side of the case body and locked, and the front ends of the front and rear vertical walls on the bottom side of the case body are Since it is opposed to the mounting surface of the tray, the vertical movement of the tray can be reliably restricted, and when removing the tray from the case body, pull the tray forward and lock the locking hook. After the part is removed from the slot of the intermediate vertical wall, the tray can be easily removed by moving the tray downward.

In other words, the tray can be easily attached to and detached from the case body.For example, in the case of a wall-mounted type, the tray can be removed while the case body is fixed to the wall, and the tray can be easily cleaned or disinfected. Become.

Further, according to the seventh invention of the present application, basically, the same effects as those of the sixth invention can be obtained. In addition, since a small convex portion having a predetermined height protruding in the vertical direction is provided in the middle of the locking portion of the locking hook, the locking portion has a slot portion of the intermediate vertical wall. In the state where the locking portion is inserted and locked, it is possible to prevent the locking portion from accidentally falling out of the slot portion. In this case, when removing the tray, the mounting surface of the tray is elastically displaced in the vertical direction so that the locking portion can be relatively easily pulled out of the slit portion of the intermediate vertical wall, so that the small convex portion is formed. Height is set. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an overall perspective view of an automatic chemical solution supply device according to an embodiment of the present invention. FIG. 2 is a perspective view showing a state in which a front cover of the automatic chemical liquid supply device is opened.

FIG. 3 is an explanatory side view of a chemical solution container used in the automatic chemical solution supply device.

FIG. 4 is a block diagram for explaining an outline of the overall configuration of the automatic chemical liquid supply device.

FIG. 5 is an explanatory front view showing a main part of a pump driving mechanism of the automatic chemical liquid supply device.

FIG. 6 is an explanatory side view of a main part of the pump drive mechanism.

FIG. 7 is an explanatory front view of a cam driven member of the pump drive mechanism.

FIG. 8 is a plan view of the cam driven member, as viewed in the direction of arrows Y8-Y8 in FIG. FIG. 9 is a side view of the force driven member, as viewed in the direction of the arrows Y9-Y9 in FIG.

FIG. 10 is an explanatory front view of a slide guide for guiding the sliding operation of the cam driven member.

FIG. 11 is a plan view of the slide guide, as viewed in the direction of the arrow 11 in FIG. 10.

FIG. 12 is a side view of the slide guide as viewed in the direction of the arrow Y12-Y12 in FIG.

FIG. 13 is an explanatory front view showing a state where the cam follower is assembled to a slide guide.

FIG. 14 is an explanatory rear view showing a state where the cam follower is mounted on a slide guide.

FIG. 15 is a bottom view showing the assembled state of the cam follower to the slide guide, as viewed in the direction of the arrow Y15-Y15 in FIG.

FIG. 16 is an enlarged explanatory view of a portion # 16 in FIG.

FIG. 17 is an explanatory front view of a slide guide to which a cam driven member is attached, showing another example of the cam driven member drop prevention mechanism.

FIG. 18 is an enlarged explanatory view of a portion # 18 in FIG.

FIG. 19 is an explanatory front view of the cam plate according to the present embodiment.

FIG. 20 is an explanatory diagram showing a stroke of the linear movement of the cam follower member with respect to the rotation angle of the cam plate.

FIG. 21 is a part of a series of explanatory views showing the downward movement fl≡ of the cam driven member due to the rotation of the cam plate, and is a front explanatory view at the start of rotation of the cam plate (rotation angle is 0 degrees). .

FIG. 22 is a part of a series of explanatory views showing the lowering operation of the cam driven member by the rotation of the cam plate, and is a front explanatory view when the rotation angle of the cam plate is 90 degrees. FIG. 23 is a part of a series of explanatory views showing the lowering operation of the cam driven member by the rotation of the cam plate, and is a front explanatory view when the rotation angle of the cam plate is 180 degrees. Fig. 24 is a series of charts showing the lowering operation of the cam follower due to the rotation of the cam plate. FIG. 7 is a part of an explanatory diagram showing a front view when the rotation angle of the cam plate is 270 degrees. FIG. 25 is a graph showing the operation characteristics of the automatic chemical liquid supply device according to the present embodiment.

FIG. 26 is an overall perspective view showing a state in which the automatic chemical liquid supply device according to the present embodiment is equipped with a tray.

FIG. 27 is an exploded perspective view of the device case and the tray of the automatic chemical solution supply device. FIG. 28 is an explanatory rear view of the device case.

FIG. 29 is a bottom view of the device case, as viewed in the direction of the arrow Y29-Y29 in FIG.

FIG. 30 is a cross-sectional view of a main part of the case main body and the tray for explaining the tray mounting operation of the device case to the case main body.

FIG. 31 is an explanatory sectional view of a main part showing a state in which the tray is attached to the case main body. FIG. 32 is an explanatory front view of a circular eccentric cam plate according to a conventional example.

FIG. 33 is an explanatory view showing a stroke of a linear movement of a cam follower member with respect to a rotation angle of a cam plate according to the conventional example.

Fig. 34 is a part of a series of explanatory views showing the lowering operation of the cam follower member due to the rotation of the cam plate according to the conventional example, and the frontal explanation at the start of rotation of the cam plate (rotation angle is 0 degree). FIG.

FIG. 35 is a part of a series of explanatory views showing the lowering operation of the cam follower member due to the rotation of the cam plate according to the conventional example, and is a front explanatory view when the rotation angle of the cam plate is 90 degrees.

FIG. 36 is a part of a series of explanatory views showing the descending operation of the cam follower member due to the rotation of the cam plate according to the conventional example, and is a front explanatory view when the rotation angle of the cam plate is 180 degrees.

FIG. 37 is a part of a series of explanatory views showing a descending operation of a cam driven member due to rotation of a cam plate according to the conventional example, and is a front explanatory view when the rotation angle of the cam plate is 2700 degrees.

FIG. 38 is a graph showing the operation characteristics of an automatic chemical liquid supply device according to a comparative example incorporating the above-described conventional cam plate. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an overall perspective view of an automatic chemical solution supply device according to the present embodiment, and FIG. 2 is a view [view] showing a state where a front cover of the device is opened. As shown in these figures, the above-mentioned automatic chemical liquid supply device 1 houses a battery box 2 for storing a dry battery as a power supply and a control unit ゃ electric motor described later in a substantially rectangular parallelepiped device case 10. A chemical container 20 having a manual pump mechanism is accommodated in a space beside these boxes 2 and 3, and the manual pump mechanism is provided behind the chemical container 20. A pump drive mechanism (to be described later) for driving is provided.

The device case 10 is made of, for example, resin and includes a front cover 12 that can be opened and closed with respect to the case body 11 having a predetermined depth. At the top of the front cover 12, a vertically elongated nozzle slot 13 for projecting a discharge nozzle 26 of the chemical solution container 20 to the front of the apparatus, and a detection sensor 32 and an indicator 33 described later are respectively provided on the front of the apparatus. Circular openings 14 and 15 are provided to protrude (see FIG. 2).

A substantially transparent front panel 16 is fitted under the slot 13 and the openings 14 and 15, and is housed in the apparatus case 10 through the panel 16. The main body 21 of the chemical solution container 20 can be visually recognized, and the type of the chemical solution currently used can be identified even with the front cover 12 closed.

Then, when replenishing the chemical or changing its type, the entire container is replaced. Therefore, it is easy to supply the chemical solution and change the type thereof, and at the same time, it is possible to minimize the possibility of inconvenience such as mixing of foreign substances and contamination.

When using the device, when closing the front side of the case body 11 with the front cover 1 2 above, use the keyholes 1 2h provided on the upper end 1 a of the front cover 12 and the case body 1 Align the key hole 1 1h formed at the upper end of 1 with these key holes

With the 11h and 12h superimposed, insert the lock key 17 from above and rotate it. As a result, the front cover 1 and 2 are locked (locked) to the case body 11. As shown in FIG. 3, for example, the chemical solution container 20 includes a container body 21 for storing a chemical solution, a sealing cap 22 for sealing an opening of the container body 21, and a chemical solution in the container body 21. And a manual pump mechanism 23 for sucking out and discharging to the outside.

The pump mechanism 23 includes a suction pump section 24 fixed to the sealing cap 22 and a press head having a piston pipe 25 p inserted reciprocally with respect to the pump section 24. 25 (pressing operation unit), and a discharge nozzle 26 connected to the pressing head 25 to discharge the sucked chemical solution to the outside. The lower end of the pump unit 24 has a container. A suction pipe 27 inserted into the liquid medicine of the main body 21 is connected.

Then, the pressing head 25 is pushed substantially along the axis of the container body 21 (that is, the piston tube 25 p is pushed into the pump section 24), so that each pushing operation is performed. A certain amount of the chemical is discharged from the nozzle 26.

The manual pump mechanism 23 has the same configuration as the well-known conventional one and performs the same function, and therefore, further detailed description and illustration are omitted.

FIG. 4 is a block diagram for explaining an outline of the configuration of the automatic chemical liquid supply device 1. The automatic chemical solution supply device 1 includes a control unit 30 which is a control circuit board on which various electric components or electronic components are arranged, for example, on a circuit board. Stored in Box 3.

The control unit 30 is electrically connected to, for example, four D1 type batteries as a power source 31 housed in the battery box 2. Further, in addition to the detection sensor 32 and the indicator 33 described above, various switches such as a sensor switch 34 and a mode switch 35 are electrically connected to the control unit 30. The detection sensor 32 is, for example, of an infrared type. The detection sensor 32 detects a user's use operation by detecting a human hand Hd or a fingertip using infrared light. It is set to be input to 0. The indicator 33 indicates whether or not the device 1 is normally operable. When the device 1 is normally operable, the indicator 33 indicates, for example, green, and the voltage of the power supply 31 is lower than the set value. When normal operation cannot be performed below, for example, it is lit red to notify You.

Further, the sensor switch 34 turns on / off (〇N / OFF) the operation of the detection sensor 32, and is normally ON. However, when the device is inspected or the chemical solution container 20 is replaced, the sensor switch 34 is turned ON. If the operation of the detection sensor 32 should be stopped, it is switched to the OFF side. The sensor switch 34 is attached to, for example, a side surface of the device case 10.

The mode switch 35 is used to select and set the discharge mode of the chemical solution. By switching the mode switch 35, the detection sensor 32 detects the operation of the user once. The user can select how many times the chemical solution should be ejected.

Further, the control unit 30 further includes a pump driving mechanism 4 for driving the manual pump mechanism 23 of the chemical liquid container 20 to automatically discharge the chemical liquid in the container body 21 from the discharge nozzle 26. 0 is electrically connected.

The pump driving mechanism 40 includes an electric motor 41 connected to a power supply 31 via a control unit 30 and driven and controlled according to a control signal from the control unit 30, and an output shaft of the motor 41. A reduction gear unit 42 for transmitting the rotation of the gear at a predetermined reduction ratio, and a cam device 43 rotationally driven by the rotational force transmitted via the gear unit 42.

As will be described in detail later, the cam device 43 includes a cam plate 44 having a predetermined peripheral shape and a rotation center set at a predetermined position, and a sliding member capable of slidingly contacting the peripheral portion of the cam plate 44. A cam follower member 45 having a contact portion, and the cam follower member 45 performs a linear motion as the cam plate 44 rotates.

The cam follower member 45 is positioned such that its top plate 45a comes into contact with the upper end of the pressing head 25 of the pump mechanism 23 of the chemical solution container 20, as indicated by the phantom line in FIG. The pump mechanism 23 is driven by the cam follower member 45 performing a linear motion.

As shown in FIGS. 5 and 6, the electric motor 41, the reduction gear unit 43, and the cam plate 44 of the pump drive mechanism 40 are mounted on a single flat base plate 49. I have. The reduction gear unit 43 includes an input gear 43A that engages with the motor gear 41G coupled to the motor output shaft 41s, and an output gear 43 coupled to the rotating shaft 44s of the cam plate 44. 3 C, and an intermediate gear 43 B positioned between the output gear 43 C and the input gear 43 A and interlocking with both gears 43 A and 43 C, and the motor output shaft 41 The rotation of s is reduced at a predetermined reduction ratio and transmitted to the rotating shaft 44 s of the cam plate 44.

The rotation shaft 44 s of the cam plate 44 is pivotally supported (rotatably supported) on a base plate 49 via a bearing 48. A projection 44 p is provided on the lower surface of the cam plate 44, for example, a limit switch (not shown) is disposed in the vicinity to measure the rotation angle or the number of rotations of the cam plate 44. I can do it.

As shown in FIGS. 7 to 9, the cam driven member 45 includes a slide plate 45 b slidably supported by a guide case 46 described below, and an upper end of the slide plate 45 b. And a top plate 45a projecting substantially at right angles to the base plate to form a substantially L-shaped basic shape in side view.

The overall shape of the slide plate 45b is rectangular in a front view. A concave portion 45c having a predetermined depth is formed on the back side of the slide plate 45b. When the pump driving mechanism 40 is assembled, the cam plate 44c is formed in the concave portion 45c. Is stored, and the inner surface 45 d of the vertical wall of the concave portion 45 c slides on the peripheral portion of the cam plate 44. The cam follower member 45 is integrally formed of, for example, a synthetic resin. The top plate 45a and the slide plate 45b are composed of a plurality of large and small reinforcing ribs 45e and 45b. They are interconnected by f.

As shown in FIGS. 10 to 12, the slide guide 46 for supporting the cam driven member 45 so as to be freely slidable up and down has a substantially rectangular shape as a whole. The guide groove part 46b that guides the left and right ends of the slide plate 4 5b so that it can slide freely in the vertical direction, the width corresponding to the top plate 45a, and the depth corresponding to the vertical stroke. And a guide case 45a formed with an opening 45c that is open at the top. On the back side of the guide case 45a, a step 45d of a predetermined width is installed so as to bridge the lower end of the upper end of the guide case 45a. I'm sick.

The slide guide 46 is mounted on the upper surface of the base plate 49 of the pump drive mechanism 40 by using fixing screws (not shown) by the mounting holes 46 f formed in the tabs 46 e at the four corners. 4 4 side).

FIGS. 13 and 14 show the state where the cam follower 45 with the cam plate 44 housed in the recess 45 c is assembled to the slide guide 46 from the front side and the rear side, respectively. It is the schematic explanatory drawing shown. The assembled state shown in FIGS. 13 and 14 shows a state where the cam follower member 45 is located at the upper end position of the stroke in the vertical reciprocation.

As shown in these figures, a spring 47 for supporting the cam driven member 45 is interposed between the slide guide 46 and the cam driven member 45.

As shown in detail in FIGS. 15 and 16, the spring 47 has upper and lower mounting portions 47 b and 4 extending at a predetermined angle from the spring body portion 47 a wound in a coil shape. 7c, and is mounted between the front wall of the guide case 46a of the slide guide 46 and the slide plate 45b of the cam driven member 45. The end of the upper mounting portion 47b is locked in the locking hole 45h of the slide plate 45b, and the end of the lower mounting portion 47c is engaged with the guide case 46a. Locked in the hole 46h. The spring coefficient of the spring 47 can sufficiently support the own weight of the cam driven member 45, and can be used when the cam driven member 45 performs a downward movement by the action of the pump driving mechanism 40. However, it is properly set so as not to apply an excessively large biasing force and hinder its smooth operation.

In the case of the cam plate 44 according to the present embodiment, the peripheral shape is a shape obtained by slightly deforming the egg shape, and as shown in FIGS. 13 and 14, the cam driven member 45 is In the state of being located at or near the upper end position of the stroke in the vertical reciprocating motion, the cam plate 44 is not in sliding contact with the upper side of the vertical wall inner surface 45 d of the cam driven member 45.

Therefore, for example, when replacing the chemical solution container 20, the drive of the motor 41 is stopped and the rotation of the cam plate 44 is stopped, and the chemical solution container is placed under the top plate 45a of the cam driven member 45. If you remove 20, you can use the spring 4 7 If there is no cam follower member 45, it will fall by its own weight to a position where the upper side of the vertical wall inner surface 45 d abuts the upper edge of the cam plate 44.

For this reason, when replacing the chemical container 20, it is necessary to remove the old container 20 and then set the new chemical container below the top plate 45a while lifting the top plate 45a from the drop position. The replacement work becomes troublesome. In addition, it is not preferable from the viewpoint of hygiene that a human touches the top plate 45a which is in direct contact with the chemical solution container 20.

However, in the present embodiment, since the spring 47 is provided to support the cam driven member 45, the cam driven member 45 is located at or near the upper end position of the stroke in the vertical reciprocating motion. Even if the chemical solution container 20 is removed from below the top plate 45a of the cam follower member 45 in the state of, the cam follower member 45 is supported by the urging force of the spring 47, It will not fall under its own weight.

Therefore, when replacing the chemical container 20, even when the old container 20 is removed, the top plate 45a is positioned at or near the upper end of the stroke in the vertical reciprocation of the cam follower 45. The new chemical container can be set below the top plate 45a without touching the top plate 45a. That is, the replacement work is simple and can be performed hygienically.

FIG. 17 and FIG. 18 show another example of the fall prevention mechanism of the cam driven member. In this example, a locking hook 5 that can be elastically displaced in the width direction of the opening 56 c (the left-right direction in FIGS. 17 and 18) is provided at the upper opening end of the opening 56 c of the slide guide 56. 6 k is provided in a body, and a hook portion 56 m having a substantially triangular shape in a front view is formed at the tip side of the locking hook 56 k. On the other hand, the left and right outer ribs 55 e of the cam follower 55 are set such that the lower end 55 k can engage with the tip hook 56 m of the locking hook 56 k. .

When the cam follower 55 is located at or near the upper end of the stroke in the vertical reciprocating motion, the lower end 55 k of the rib 55 e is connected to the tip hook of the locking hook 56 k. The cam follower 55 is held in that position by being locked to the portion 56m.

In addition, the cam follower 55 is lowered by the rotation of the cam plate 44. The lower end 55 k of the rib 55 e descends along the upper tapered surface 56 t of the tip hook 56 m of the locking hook 56 k and cantilever at the upper end. The supported locking hook 56 k is elastically displaced so that the tip hook 56 m moves outward, so that the cam follower 55 can be lowered without any trouble. The cam driven member 55 and the slide guide 56 have the same configuration as those of the above-described members 45 and 46 except for the mechanism for preventing the cam driven member from falling.

When the automatic chemical liquid supply device 1 having the above configuration is operable as usual (the indicators 33 and 33 are displayed in green), and the user extends his hand below the discharge nozzle 26 to use the device 1 ( In FIG. 2, the detection sensor 32 detects this use operation and outputs a detection signal to the control unit 30.

Then, the electric motor 41 of the pump drive mechanism 40 is driven based on the detection signal, and the rotational force is transmitted to the cam device 43 via the reduction gear unit 42 to rotate the force plate 44. Driven. The rotational movement of the cam plate 44 is converted into a linear movement of the cam follower member 45, and the cam follower member 45 presses the pressing head 25 of the pump mechanism 23 of the chemical solution container 20 (pressing operation). Then, a certain amount of the chemical is discharged from the discharge nozzle 26 toward the user's hand. In the present embodiment, as described above, when the cam driven member 45 pushes the pressing head 25 of the pump mechanism 23, the cam is driven so that the pushing speed is as constant as possible during the pushing stroke. The peripheral shape of the plate 4 4 is set. Hereinafter, the elevational movement of the cam plate 44 and the cam driven member 45 accompanying the rotation of the cam plate 44 will be described.

FIG. 19 is an explanatory front view of the cam plate 44. As shown in this figure, the cam plate 44 according to the present embodiment has a peripheral shape obtained by slightly deforming the oval shape, and is centered on the axis of the rotating shaft 44 s (rotation center C s). It is driven to rotate in the direction of the arrow (clockwise in FIG. 19).

That is, when the electric motor 41 is driven, the cam plate 44 rotates in the direction of the arrow around the point C s, and starts at the point P o (rotation angle: φ = 0 °) and starts at the point P 1 (rotation). Angle: ψ = 105 degrees), Point Ρ 2 (rotation angle: φ = 135 degrees), Point Ρ 3 (rotation Angle: φ = 262.5 degrees), and slides along the inner surface 45 d of the vertical wall of the cam driven member 45 along a curve that defines the peripheral shape.

FIGS. 21 to 24 show the state of sliding contact between the periphery of the cam plate 44 and the inner surface 45 d of the vertical wall of the cam driven member 45 along with the rotation of the cam plate 44, and the cam driven portion. The vertical movement (downward movement) of the material 45 is shown in the order of the rotation angles φ = 0, 90, 180, and 270 degrees.

FIG. 20 shows a change in the amount of lowering L of the cam follower member 45 with respect to the rotation angle as the cam plate 44 rotates. FIG. 20 and FIG. 33 to be described later show the operating characteristics when the cam device is driven with no load (that is, not when the pump mechanism of the chemical solution container is driven by being incorporated in the automatic chemical solution supply device). _{C In the} present embodiment, a predetermined portion of the curve defining the peripheral shape of the cam plate 44 (specifically, a portion in the range from the point P1 to the point P3) SA is the cam plate 4 A two-dimensional polar coordinate display with the rotation center C s as the origin, and a spiral curve defined by the equation r = a Θ (r is a radial, Θ is a declination, a is a constant) (so-called Archimedes spiral curve) It is formed with.

The Archimedes spiral curve, the angular position of theta = 0 degree as to the starting point (r = 0), 0 = 1 5 0 degrees (point P 1) 6 = 3 0 7 . 5 degrees (point! ³ 3 The range up to) is applied as a curve defining the peripheral shape of the cam plate 44.

Regarding the constant a in the Archimedes spiral curve r = aΘ, the larger the constant a, the larger the outer circumference of the cam plate 44 and the greater the load on the electric motor 41. The distance b between the outer periphery (point Ρο) of the force plate 44 at the rotation start point (rotation angle φ = 0 °) of the cam plate 44 and the rotation center C s increases as the cam follower member 45 increases. Is reduced.

In the present embodiment, in order to secure a stroke length of, for example, 18 mm [mm] with respect to the pushing amount of the pump mechanism 23 of the chemical solution container 20 and to make the cam plate as compact as possible. The above constants a and b were set to a = 4.2 [mm] and b = 4.7 [mm].

Also, of the peripheral shape of the cam plate 44, a portion other than the portion SA defined by the Archimedes spiral curve (that is, from the point P3 to the point P1 including the point Po). In order to obtain a smooth rotation of the cam plate 44, the curves having different radii of curvature were formed by connecting several curves 4 smoothly. As described above, a predetermined portion (specifically, a portion in a range from the point P1 to the point P3) of the curve defining the peripheral shape is obtained by setting the rotation center C s of the cam plate 44 to the origin. A cam plate 44 formed by an Archimedes spiral curve was set. For the portion SA defined by the Archimedes spiral curve in the peripheral portion of the cam plate 44, the moving speed V with respect to the angle change of the point moving on the curve forming the peripheral shape is constant (v = dr Z d 0 = a), so as can be clearly understood from FIG. 20, the moving speed (that is, the inclination in the graph of FIG. 20) when converting the rotational motion of the cam plate 44 into the descending motion of the cam follower member 45. Is constant.

Thereby, the descending speed of the cam follower 45 can be made constant over a stroke range corresponding to the predetermined portion SA defined by the Archimedes spiral curve in the peripheral portion of the cam plate 44. The operation speed at the time of operating the manual pump mechanism 23 of the chemical liquid container 20 via 45 can be kept constant, and the discharge state of the chemical liquid can be made uniform and stable.

The stroke range corresponding to the predetermined portion SA is at least substantially at the middle (point) of the pressing stroke of the pressing head 25 performing the pressing operation and the returning operation in conjunction with the reciprocating linear operation of the cam driven member 45. From P 2: rotation angle ψ = 135 degrees) to the substantially end point (point Ρ 3: rotation angle ψ = 262.5 degrees). Strictly speaking, the end point of the pushing stroke (that is, at the time of maximum pushing) is the rotation angle = 264.

It is set to correspond to 5 degrees.

Therefore, in the above-mentioned range which is important for evaluating the discharge state of the chemical solution, the moving speed at the time of converting the rotational movement of the cam plate 44 into the reciprocating linear movement of the cam follower member 45 is made constant, whereby By keeping the pressing speed of the head 25 constant, the discharge state of the chemical solution can be made uniform and stable.

Further, as can be clearly understood from FIGS. 20 and 21 to 24, the rotation angle φ of the cam plate 44 corresponding to the pressing operation period of the pressing head 25 is 264.5 degrees, and 1 It is larger than 80 degrees.

In addition, in the case where the chemical solution is discharged a plurality of times by one detection of the detection sensor 32, Since the pause period (waiting time) is shorter than the discharge period, the time loss can be reduced accordingly.

FIGS. 32 to 38 show the operating characteristics of a circular eccentric cam plate 144 as a comparative example and an automatic chemical liquid supply device incorporating the same.

As shown in FIG. 32, in this comparative example, the peripheral shape of the cam plate 144 is a simple circle, and the axis C s ′ (center of rotation) of the rotating shaft 144 s is offset from the center of the circle. (Eccentric).

In the case of the cam plate 144, the movement (movement of the pressing head) of the cam follower 144 accompanying the rotation thereof is not uniform as shown in FIG.

When the cam plate 144 of this comparative example is used, the pushing operation period (rotation angle φ = 0 degree) in the operation of one reciprocation of the cam driven member 144 (one rotation of the cam plate 144) is performed. From φ = 180 degrees) and the return operation period (rotation angle from φ = 180 degrees to ^ = 360 degrees). Therefore, when comparing such a general circular eccentric cam plate 144 with the cam plate 44 according to the present embodiment, the cam plate 44 of the present embodiment performs the same work more. Since the rotation is performed at a large rotation angle, the load on the motor 41 and the reduction gear unit 42 is reduced, and the current consumption is also reduced.

FIGS. 34 to 37 show the state of sliding contact between the peripheral edge of the cam plate 144 and the inner surface of the vertical wall 144 of the force driven member 144 along with the rotation of the cam plate 144. The vertical movement (downward movement) of the cam driven member 145 is shown in the order of rotation angles φ = 0 °, 90 °, 180 °, and 270 °.

Note that the cam driven member 144 and the slide guide 144 in this comparative example have exactly the same configuration as the cam driven member 45 and the slide guide 46 according to the present embodiment, and have the same operation. What to do. In the case of the cam plate 144 of this comparative example, the motor is stopped because the peripheral edge of the cam plate 144 is always in sliding contact with the inner surface 144 d of the vertical wall of the cam driven member 144. Thus, even if the rotation of the cam plate 144 stops, the cam driven member 144 is directly supported by the cam plate 144. Therefore, the above-described fall prevention mechanism is not required. Next, the characteristics of the automatic chemical liquid supply device 1 incorporating the cam plate 44 according to the present embodiment (Example of the present invention) and the automatic chemical liquid supply device incorporating the cam plate 144 according to the comparative example are described. Were compared. This comparative test was performed under exactly the same conditions except for the cam plate. The outline of the test conditions is shown below. 'Power supply: 6 volts [V] (4 x D-size alkaline batteries)

-Reduction ratio of reduction gear unit: 1 / 60.75

■ Drug container: with spray nozzle type manual pump

-Chemical solution: Hibiscol

-Material of cam plate, cam follower and slide guide: All resin

· Sliding contact lubricant: silicone grease

In this test, the motor load, voltage, current value, etc., during operation of the automatic chemical liquid supply device were measured. One example of the measurement results is shown in FIG. 25 (Example of the present invention) and FIG. 38 (Comparative example). Various characteristic values obtained based on this test were as follows.

-Average voltage (average value of initial 10 cycles)

Example of the present invention: 5.854 [V] / Comparative example: 5.627 [V]

-Average current (average value of initial 10 cycles)

Example of the present invention: 0.543 [A] Z Comparative example: 0.705 [A]

-Maximum load (during initial 10 cycles)

Example of the present invention: 2.504 [kgf] Z Comparative example: 2.408 [kgf]

· Current consumption for 100,000 cycles (calculated value based on data)

Inventive Example: 15908 CmAh] Z Comparative Example: 25777 [mAh]

.Pressing stroke time of pressing head 25

Example of the present invention: 0.78 [second] Comparative example: 0.90 [second]

As described above, in the example of the present invention, the current consumption is smaller and the battery life is longer than in the comparative example. In addition, the pressing stroke time of the pressing head 25 is shortened. Since the stroke length is the same, in other words, the pushing speed increases. In particular, when the chemical liquid is discharged in a spray state (a so-called spray pump) or when stones or the like are discharged in a foam state (a so-called forming pump), if the pushing speed is low, good discharge is achieved. In some cases, a state cannot be obtained. In the examples, it has been found that a sufficient pushing speed can be secured.

By the way, the above-mentioned automatic chemical solution supply device 1 can be used as a table mounting type device by mounting it on a flat place such as a table in the state shown in FIG. 1, but as shown in FIG. A tray 70 projecting substantially vertically forward from the case body 11 can be attached to the lower side of the case 10.

Further, as shown in FIG. 28, in the automatic chemical liquid supply device 1, a plurality of mounting holes 11 k are provided on the back surface of the case body 10 of the device case 10, and the device case 10 is mounted on a wall. It can be mounted and used as a wall-mounted device. In the case of this wall-mounted type, the tray 70 is mounted as a standard in order to enhance user convenience.

Hereinafter, an attachment structure for detachably attaching the tray 70 to the device case 10 will be described.

The tray 70 is more preferably made of resin, and has a concave receiving portion 71 at its front portion, as can be clearly seen from FIGS. 26 and 27, and has a tray 7 at its rear portion. A mounting portion 72 is formed for mounting 0 on the bottom side of the case body 11 of the device case 10. A pair of guide pieces 73 is provided substantially at the center of the left and right side edges of the upper surface (mounting surface) 72 a of the mounting portion 72. A locking hook 4 extending in the width direction is formed at a predetermined location in the front-rear direction of the mounting surface 72a.

As shown in detail in FIGS. 30 and 31, the locking hook 74 includes a base 74 a extending substantially vertically upward, and substantially vertically extending from the tip side of the base 74 a (that is, the mounting surface). It is formed substantially in an L-shape with the locking portion 74 b protruding. More preferably, a small convex portion 74c having a predetermined height and projecting downward is provided at an appropriate position in the middle of the locking portion 74b.

On the other hand, as can be clearly seen from FIGS. 27 and 29, the left and right vertical walls 61 and the front and rear vertical walls 6 2 and 6 3 are provided on the bottom side of the case body 11 of the device case 10. A tray attaching / detaching portion 60 having an intermediate vertical wall 64 extending in the left-right direction is provided. Each of the vertical walls 61, 62, 63, and 64 is formed to extend substantially vertically downward from the bottom surface 11 b of the case body 11.

The intermediate vertical wall 6 4 is located between the front vertical wall 6 2 and the rear vertical wall 6 3. It is arranged at the position corresponding to the locking hook 74. A slot portion 64 h through which the locking portion 74 b of the locking hook 74 can pass is formed in the intermediate vertical wall 64. In order to form the slot portion 64 h, the rear vertical wall 63 is also provided with a slot portion 63 h for die cutting.

When attaching the tray 70 to the tray attaching / detaching portion 60 of the case main body 11, first, as shown in detail in FIGS. 30 and 31, first attach the mounting portion 72 of the tray 70 to the case main body. 11. Position the tray below the tray attaching / detaching part 60 (see FIG. 30), and insert the locking part 74 b of the locking hook 74 into the slot part 64 h of the intermediate vertical wall 64. In this state, the front ends of the front and rear vertical walls 62 and 63 of the case body 11 face the mounting surface 72a of the tray 70 (see FIG. 31). In the width direction of the tray 70, the movement is regulated by the left and right guide pieces 73 guided by the inner surfaces of the vertical walls 61 on the left and right sides of the tray attaching / detaching portion 60.

The vertical length of the front and rear vertical walls 62 and 63 is set to be longer than the height of the base 74a of the locking hook 74, and the tray mounting state shown in FIG. 31 is set. In this state, the movement and rotation of the tray 70 in the vertical direction are reliably restricted.

When inserting the locking portion 74b into the slot portion 64h, more preferably, the mounting surface 72a is slightly upwardly elastic by lifting the locking hook 74. The insertion operation is performed with the displacement.

Accordingly, in the mounting state shown in FIG. 31, the locking portion 74b is urged downward by the elastic force of the mounting surface 72a after passing through the slot portion 64h, and Even if force is applied in the direction, it will not accidentally fall out of the slot 6 4 h.

Further, a small convex portion 74c having a predetermined height protruding downward is provided in the middle of the locking portion 74b of the locking hook 74, and the locking portion 74b is a slot portion. The small convex portion 74c is locked to the intermediate vertical wall 64 at the rear end side of the slot portion 64h while being locked through the hole 64h. This ensures that b does not accidentally fall out of the slot 64 h.

When the tray 70 is removed from the case body 11, the mounting surface 70 a of the tray 70 is elastically displaced upward so as to lift the locking hook 74 when removing the tray 70 from the case body 11. The above-mentioned locking portion 7 4 b is relatively easily removed from the slot portion 6 4 h of the intermediate vertical wall 64. It is set appropriately so that you can escape.

The tray 70 can be easily removed from the tray attaching / detaching portion 60 of the case body 11 by pulling out the locking portion 74b from the slot portion 64h in this manner.

As described above, according to the present embodiment, the tray 70 can be easily attached to and detached from the case main body 11 of the device case 10. For example, the automatic chemical solution supply device 1 can be a wall-mounted type. Even when used, the tray 70 can be removed while the case body 11 is fixed to the wall, so that the tray 70 can be easily cleaned or disinfected.

The present embodiment relates to a case where a cam device having a cam plate in which a part of a curve defining a peripheral shape is formed by an Archimedes spiral curve is used by being incorporated in an automatic chemical liquid supply device. However, the above-described cam device is not limited to such a case, and may be applied to other devices and devices where it is desired to convert at least a part of the rotational motion of the cam plate into linear motion at a constant speed. You can do it.

Thus, the present invention is not limited to the above embodiments. Needless to say, various improvements or design changes can be made without departing from the spirit of the invention. Industrial applicability

As described above, according to the cam device according to the present invention, the rotational speed of the cam plate when converting the rotational movement of the cam plate into the linear movement operation of the force driven member can be kept constant. It is effective to make the discharge state of the chemical liquid uniform and stable by incorporating it into an automatic chemical liquid supply device that operates the manual pump mechanism of the chemical liquid container via a member. Further, in the automatic chemical liquid supply device of the present invention, the operating speed at the time of operating the manual pump mechanism of the chemical liquid container via the cam driven member is kept constant, and the discharge state of the chemical liquid is made uniform and stable. Therefore, for example, it is effective for supplying a chemical solution in which it is required to keep the ejection state of the chemical solution in a good mist state or a foam state, and a load of a motor for applying a driving force to a cam plate of an automatic chemical solution supply device and This is effective for reducing current consumption. Further, the automatic chemical liquid supply device according to the present invention has a The tray mounting structure allows the tray to be easily attached to and detached from the case body.For example, in the case of a wall-mounted automatic chemical solution supply device, the tray can be removed while the case body is fixed to the wall, and the tray can be cleaned or disinfected. This is effective in making it easy to perform

Claims

The scope of the claims

1. A cam plate having a predetermined peripheral shape and a rotation center set at a predetermined portion, and a cam driven member having a sliding contact portion capable of slidingly contacting the peripheral portion of the cam plate. A cam device in which the cam follower member performs a linear motion in conjunction with

A predetermined part of the peripheral shape of the cam plate is a two-dimensional polar coordinate display with the rotation center as the origin, and is defined by a formula r = a 0 (where r is a radial radius, 0 is a declination, and a is a constant). A force device formed of a curved curve.

2. A drug solution container having a manual pump mechanism, a pump drive mechanism for driving the manual pump mechanism, a power supply unit for supplying drive power to the pump drive mechanism, and a detection sensor for detecting a user's use operation. A control unit that controls the operation of the pump driving mechanism in accordance with an output signal from the detection sensor. When the detection sensor detects a user's use operation, the pump driving mechanism causes the manual pump to operate. An automatic chemical solution supply device, wherein a mechanism is driven to automatically supply a chemical solution in the chemical solution container,

The pump drive mechanism includes an electric motor connected to the control unit, a cam plate connected to an output shaft of the electric motor, and a cam plate slidably provided on a periphery of the cam plate. A cam device having a cam driven member that drives the manual pump mechanism by performing a reciprocating linear operation in conjunction with the rotational operation of

A predetermined portion of the peripheral shape of the cam plate is expressed in a two-dimensional polar coordinate system with the center of rotation of the cam plate as an origin, and is defined by an equation r = a Θ (where r is a radius, Θ is a declination, and a is a constant). An automatic chemical liquid supply device characterized by being formed in a spiral curve.

3. The manual pump mechanism has a head portion that performs a pushing operation and a returning operation in conjunction with the reciprocating linear operation of the cam driven member accompanying the rotation of the cam plate. 3. The automatic chemical liquid supply device according to claim 2, wherein a peripheral portion of the cam plate corresponding to an area including at least a substantially middle to a substantially end point in the pushing stroke of the cam plate is formed by the spiral curve.

4. The manual pump mechanism has a head portion that performs a pushing operation and a returning operation in conjunction with the reciprocating linear operation of the cam follower member accompanying the rotation of the cam plate. The circumference and the 緣 shape of the cam plate are set so that the rotation angle of the cam plate corresponding to the pushing operation period is larger than 180 degrees. Automatic chemical liquid supply device.

5. The cam follower performs a linear motion in the vertical direction, and is provided with a fall prevention mechanism for preventing the cam follower from falling due to its own weight when the rotation of the cam plate is stopped. 5. The automatic chemical liquid supply device according to claim 2, wherein the automatic chemical liquid supply device is characterized in that:

6. A drug solution container having a manual pump mechanism, a pump drive mechanism for driving the manual pump mechanism, a power supply unit for supplying drive power to the pump drive mechanism, and a detection sensor for detecting a user's use operation. A control unit that controls the operation of the pump driving mechanism in accordance with an output signal from the detection sensor. When the detection sensor detects a user's use operation, the pump driving mechanism causes the manual pump to operate. A tray mounting structure in which a mechanism is driven to detachably mount a tray protruding substantially vertically forward on a bottom side of a case body of an automatic chemical liquid supply device capable of automatically supplying the chemical liquid in the chemical liquid container. ,

At the rear of the tray, a mounting surface for the bottom surface side of the case body is provided. At a predetermined portion of the mounting surface, a base extending substantially vertically upward, and a locking portion protruding substantially vertically from the distal end side of the base. And an intermediate vertical wall provided with a slot portion through which the engaging portion of the engaging hook can pass, and a front and a rear of the intermediate portion on the bottom side of the case body. Front and rear vertical walls which are longer in the vertical direction than the base of the locking hook,

When the tray is mounted on the bottom side of the case body, the locking portion of the locking hook is inserted into the slot of the intermediate vertical wall and locked, and the front and rear sides are locked. An automatic chemical liquid characterized in that a tip of a vertical wall faces a mounting surface of the tray.

7. The automatic chemical solution supply device according to claim 6, wherein a minute convex portion having a predetermined height is provided in the middle of the locking portion of the locking hook so as to project vertically.