JP2018019779A - Discharge device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge device including a sensor unit disposed with a sensor part and making the sensor unit compact while securing visibility of light radiated from a light source.SOLUTION: A discharge device 3 includes a sensor unit 320 disposed with a sensor part 32 having a light emission part 32a and a light receiving part 32b. The discharge device 3 includes: a light source part 33 disposed in the sensor unit 320 and radiating light; and a light guide member 323 disposed on a side in a light radiation direction of the light source part 33. The light source part 33, the light emission part 32a and the light receiving part 32b are disposed in one substrate 322.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a discharge device.

  Conventionally, a sensor unit in which a sensor (sensor unit) for detecting a hand is arranged, a water soap discharging unit that discharges soap when a hand is detected by the sensor, and the amount of water soap in the tank have been reduced. 2. Description of the Related Art A soap dispenser is known that includes a replenishment light (light source) such as an LED that lights up when the water soap is replenished (see, for example, Patent Documents 1 and 2). In the ejection devices disclosed in Patent Documents 1 and 2, a hand detecting sensor and a replenishing lamp (light source) such as an LED are disposed at different locations.

JP 2006-271404 A JP-A-4-28313

  It is preferable that the LED (light source) for notifying the timing of replenishment of the soap with water is arranged near the soap soap discharge section so that it can be easily seen by the administrator who performs the maintenance work of the discharge device. On the other hand, there are many cases where a sensor for detecting a hand is arranged near the soap and water discharge section. For this reason, it is conceivable that an LED (light source) for notifying the timing of replenishing soap with water is arranged near the sensor for detecting the hand.

When the LED for notifying the timing of replenishing the soap with water and the sensor for detecting the hand are arranged at close positions, the sensor window of the sensor may be shared with the LED window. In this case, in addition to arranging the sensor and the sensor substrate on the inner side of the sensor window, it is necessary to arrange the LED and the LED substrate, etc., which are close to the sensor window on the inner side of the sensor window. There is a risk that the portion will be enlarged.
On the other hand, if the LED is disposed at a position deeper from the sensor window in order to suppress the enlargement of the portion near the sensor window, the light emitted from the LED may be difficult to see from the outside.
Therefore, there is a demand for an ejection device that can make the sensor unit compact while ensuring the visibility of the light emitted from the LED (light source).

  An object of the present invention is to provide a discharge device that includes a sensor unit in which a sensor unit is disposed and that can make the sensor unit compact while ensuring the visibility of light emitted from a light source.

  The present invention provides a sensor unit (for example, a later-described sensor) in which a sensor unit (for example, a later-described sensor 32) having a light-emitting unit (for example, a later-described light-emitting unit 32a) and a light-receiving unit (for example, a later-described light-receiving unit 32b) is disposed. A discharge device (e.g., a water soap discharge device 3 to be described later) provided with a sensor unit 320), which is disposed in the sensor unit and irradiates light (for example, a notification LED 33 to be described later); The present invention relates to a discharge device including a light guide member (for example, a light guide member 323 described later) disposed on the light irradiation direction side.

  The light source unit, the light emitting unit, and the light receiving unit are preferably arranged on one substrate (for example, a sensor substrate 322 described later).

  The light source unit, the light emitting unit, and the light receiving unit are preferably arranged side by side.

  The sensor unit includes a sensor window (for example, a sensor window member 373d described later) disposed in front of the light emitting unit and the light receiving unit, and the ejection device further includes an ejection unit from which liquid is ejected. The discharge portion is connected to a front end surface portion (for example, a front end surface portion 372 described later) extending in the vertical direction and a lower end portion of the front end surface portion, and is inclined downward toward the rear from the front end surface portion. And an inclined surface portion (for example, an inclined surface portion 373 described later) on which the sensor window is disposed.

  ADVANTAGE OF THE INVENTION According to this invention, the discharge apparatus which is provided with the sensor unit by which the sensor part is arrange | positioned and can ensure the visibility of the light irradiated from a light source can be provided compactly can be provided.

1 is an overall perspective view of a hand washing apparatus according to an embodiment of the present invention. It is a perspective view which shows the water soap discharge instrument of the water soap discharge apparatus which concerns on one Embodiment of this invention. It is a front view of the water soap discharge instrument of the water soap discharge device concerning one embodiment of the present invention. It is sectional drawing which shows the inside of a sensor unit. It is a perspective view which shows the positional relationship of the main components of a sensor unit.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment. FIG. 1 is an overall perspective view of a hand-washing apparatus 1 according to an embodiment of the present invention. FIG. 2 is a perspective view showing the water soap dispenser 30 of the water soap dispenser 3 according to one embodiment of the present invention. FIG. 3 is a front view of the water soap dispenser 30 of the water soap dispenser 3 according to one embodiment of the present invention. FIG. 4 is a cross-sectional view showing the inside of the sensor unit 320. FIG. 5 is a perspective view showing the positional relationship of the main components of the sensor unit 320.

  The water soap dispenser 3 according to the present embodiment is installed together with a water discharge device such as an automatic water faucet in a hand wash device 1 installed in a toilet or a washroom of a public facility such as a railway station, for example, and an object such as a human hand Is detected by a sensor, and water soap is automatically discharged based on the detection signal.

  As shown in FIG. 1, the hand washing apparatus 1 according to the present embodiment includes a water discharge device 20, a water soap discharge device 3, a bowl 101, and a table 110. The water soap discharge device 3 (liquid discharge device) includes a water soap discharge device 30 (liquid discharge portion), a water soap supply portion 40, an air supply portion 50, a control unit 60, and a part of the water soap discharge device 3. And a metal housing 70 for housing the housing.

The stand 110 constitutes the lower part of the hand washing apparatus 1. Inside the stand 110, a part of the soap dispenser 3 is housed in a state surrounded by the metal casing 70, and equipment such as a drain pipe and other pipes (not shown) are housed.
Moreover, the hand-washing part 10 is arrange | positioned above the stand 110. FIG. The hand-washing unit 10 includes a bowl 101, a water discharge device 20, and a water soap dispenser 30.

  The water discharge device 20 has a sensor 22 for detecting an object and a water discharge port 23 on the distal end side of the water discharge device main body 21. The water discharge device 20 automatically discharges water (or hot water) from the water discharge port 23 when an object such as a human hand enters the detection range of the sensor 22 and the sensor 22 detects the object.

  As shown in FIG. 1, the water soap dispenser 30 includes a sensor 32 that detects an object, a notification LED 33 that emits light, and a discharge port 34 on the distal end side of the instrument body 31 (main body). . The water soap dispenser 30 constitutes a part of a water soap dispenser 3 to be described later. The internal structure of the water soap dispenser 30 will be described later.

  The discharge port portion 34 discharges bubbles formed by mixing soap and water (air) and air from the tip portion.

  The sensor 32 is electrically connected to a control unit 60 described later, and transmits a detection signal to the control unit 60 when an object is detected. The water soap dispenser 30 automatically discharges water soap from the discharge port 34 when an object such as a human hand enters the detection range of the sensor 32 and the sensor 32 detects the object.

  The notification LED 33 notifies the timing of replenishment of water soap into the water soap tank 41 that stores water soap. The notification LED 33 is electrically connected to a control unit 60 described later, and is based on a signal output from the control unit 60 to which a liquid level signal of water soap detected by a liquid level sensor (not shown) is input. Then, the timing of replenishment of the water soap into the water soap tank 41 is notified by, for example, blinking, turning on and off.

  The bowl 101 receives water discharged from the water discharging device 20 and used for hand washing, or water soap discharged from the water soap discharging device 30 and used for hand washing, and then discharged. A drain port 102 is formed in a substantially central recess of the bowl 101. The drain port 102 communicates with a drain pipe (not shown). The water or water soap received by the bowl 101 is guided to the drain outlet 102 and discharged from the drain outlet 102 to the outside such as a sewer through the drain pipe.

The configuration of the water soap dispenser 3 according to this embodiment will be described.
As shown in FIG. 1, the water soap dispenser 3 includes a water soap dispenser 30, a water soap supply unit 40, an air supply unit 50, a control unit 60, a part of the water soap supply unit 40, and a control unit. And a metal housing 70 for housing 60.

  The water soap supply unit 40 includes a water soap tank 41 (tank), a water soap pump 42 (pump), and a water soap supply pipe 43. The water soap tank 41 stores water soap supplied to the water soap dispenser 30.

  For example, as shown in FIG. 1, the metal housing 70 is disposed in the lower part of the base 110 in a state in which the water soap tank 41, the water soap pump 42 and the control unit 60 of the water soap supply unit 40 are accommodated. The The metal housing 70 is formed of a metal material.

The water soap supply pipe 43 is a pipe connecting the water soap tank 41 and the water soap dispenser 30, and water soap circulates therethrough. In the middle of the water soap supply pipe 43, a water soap pump 42 is provided.
The water soap pump 42 sends the water soap stored in the water soap tank 41 toward the water soap discharge device 30.

  The air supply unit 50 includes an air pump 51 and an air supply pipe 52. The air supply pipe 52 is a pipe that supplies air for forming water soap bubbles to the water soap discharge device 30. The air pump 51 has a drive unit such as a motor, compresses air by driving the drive unit, and pumps the air downstream through the air supply pipe 52. The air pump 51 is electrically connected to the control unit 60 and supplies air to the water soap dispenser 30 based on a control signal transmitted from the control unit 60.

The control unit 60 includes a CPU and a memory, and controls the water soap discharge device 3 by controlling the operations of the water soap discharge device 30, the water soap pump 42, and the air pump 51. The control unit 60 includes a control IC and a circuit board on which the control IC and the like are mounted.
The control unit 60 transmits a control signal to the soap and water pump 42 and the air pump 51 based on the detection signal from the sensor 32.
When the liquid level sensor (not shown) detects a decrease in the liquid level of the water soap stored in the water soap tank 41, the control unit 60 notifies the LED 33 so that the detection result blinks or lights up. To control.

The water soap dispenser 30 will be described.
As shown in FIGS. 2 to 4, the water soap discharge device 30 includes a device main body 31 and a discharge port portion 34. As shown in FIG. 4, the instrument main body 31 includes a sensor unit 320 including a sensor 32 and a notification LED 33, a holding member 35, and a main body case 37.

As shown in FIGS. 2 to 4, the main body case 37 is a substantially cylindrical metal member. The sensor unit 320 and the holding member 35 are accommodated inside the main body case 37.
As shown in FIG. 2, the main body case 37 includes a cylindrical peripheral surface portion 371, a distal end surface portion 372 formed at the upper portion on the distal end side, and an inclined surface portion 373 formed at the lower portion on the distal end side.

  As shown in FIG. 2, the cylindrical peripheral surface portion 371 is formed in a cylindrical shape extending from the proximal end portion 371 a to the distal end side. The cylindrical peripheral surface portion 371 is open on the proximal end portion 371a side, and a distal end surface portion 372 and an inclined surface portion 373 are provided on the distal end side.

  The distal end surface portion 372 is disposed on the upper end of the distal end of the main body case 37 and extends in the vertical direction. The front end surface portion 372 is formed of a substantially semicircular plate material whose upper side is convex.

  The inclined surface portion 373 is formed at the lower part of the front end of the main body case 37. The inclined surface portion 373 extends from the lower end portion of the distal end surface portion 372 so as to be inclined downward toward the rear on the proximal end portion 371a side. The inclined surface portion 373 is formed in a substantially semicircular shape having a convex downward side.

  The inclined surface portion 373 includes a frame portion 373a formed in a substantially semicircular frame shape, and a decorative cover 373b disposed inside the frame portion 373a. The decorative cover 373b is formed in a substantially semicircular plate shape corresponding to the shape of the inner portion of the frame portion 373a.

  The decorative cover 373b includes a sensor opening 373c and a discharge port opening 373e. The sensor opening 373c is formed on the upper side of the inclined surface of the inclined surface portion 373. The discharge port opening 373e is formed on the lower side of the slope of the inclined surface portion 373.

  The sensor opening 373c is formed to open in a rectangular shape with both corners at the lower end cut. A sensor window member 373d made of a permeable material is disposed in the sensor opening 373c. The sensor window member 373d constitutes a part of the sensor unit 320, and the sensor 32 and the notification LED 33 are disposed inside the sensor window member 373d as shown in FIG.

  The discharge port opening 373e is formed in a circular shape. The discharge port portion 34 is inserted into the discharge port portion opening 373 e when the discharge port portion 34 is attached to the instrument main body 31.

  As shown in FIG. 4, the holding member 35 is disposed inside the main body case 37, holds the sensor unit 320, and holds the discharge port portion 34 in a detachable manner. The holding member 35 is formed of a resin member.

  The sensor housing portion 353 is formed so as to communicate with the sensor opening 373 c of the inclined surface portion 373 in the main body case 37. The sensor accommodating portion 353 is formed in a concave shape having substantially the same shape and size as the outer shape of the sensor unit 320. By inserting the sensor unit 320 into the sensor housing portion 353, the sensor unit 320 is held by the holding member 35.

Next, the sensor unit 320 will be described.
As shown in FIGS. 4 and 5, the sensor unit 320 includes a sensor case 321, a sensor substrate 322, a sensor 32 (sensor unit) having a light emitting unit 32a and a light receiving unit 32b, and a notification LED 33 as a light source unit. A light guide member 323, a light emitting unit side lens 324a corresponding to the light emitting unit 32a, a light receiving unit side lens 324b corresponding to the light receiving unit 32b, a slit plate 325, and a rear side constituent member 326.

  The sensor case 321 is formed in a box shape, and the sensor case 321 includes a sensor substrate 322, a sensor 32 having a light emitting unit 32a and a light receiving unit 32b, a notification LED 33 as a light source unit, a light guide member 323, and a light emitting unit side. The lens 324a, the light receiving unit side lens 324b, the slit plate 325, and the rear side component member 326 are accommodated. In the present embodiment, the light emitting unit 32 a and the light receiving unit 32 b of the sensor 32 and the notification LED 33 are mounted on the mounting surface of one sensor substrate 322 by being mounted on the mounting surface of one sensor substrate 322. ing.

  A sensor window member 373d is provided on one end surface of the sensor case 321 (front surface in FIG. 4). The sensor window member 373d extends in the left-right direction X. The sensor window member 373d is disposed in the sensor opening 373c (see FIG. 3) of the inclined surface portion 373 of the main body case 37 when the sensor unit 320 is attached to the soap and water discharge apparatus 3. In the present embodiment, the one end surface side of the sensor case 321 where the sensor window member 373d is provided is also referred to as the front end side (front side, front side), and the side of the sensor case 321 where the sensor window member 373d is provided. The opposite side is also referred to as the rear side (back side).

  The sensor substrate 322 is supported by the rear side constituent member 326, the sensor case 321 and the like inside the sensor unit 320. As shown in FIGS. 4 and 5, the sensor substrate 322 is formed in a plate shape, and the outer shape is formed in a substantially rectangular shape. The sensor substrate 322 is disposed to be inclined at the same inclination angle as the inclined surface portion 373 in the main body case 37. The sensor substrate 322 extends in the left-right direction X when viewed from the user of the water soap dispenser 30.

  As shown in FIG. 4, the mounting surface of the sensor substrate 322 faces the sensor window member 373 d side in the sensor case 321. On the mounting surface of the sensor substrate 322, light emission of a sensor 32, which will be described later, from one side in the left-right direction X (left side in the paper surface of FIGS. 4 and 5) to the other side (right side in the paper surface in FIGS. 4 and 5). The unit 32a, the notification LED 33, and the light receiving unit 32b of the sensor 32 are arranged in this order.

As described above, the notification LED 33 is used to supply water soap to the water soap tank 41 based on a signal output from the control unit 60 to which a liquid level signal of water soap detected by a liquid level sensor (not shown) is input. The replenishment timing is notified by blinking, turning on and off, for example.
The notification LED 33 is disposed between the light emitting unit 32 a and the light receiving unit 32 b of the sensor 32 in the left-right direction X of the sensor unit 320. The notification LED 33 is arranged at the approximate center in the left-right direction X in the sensor unit 320. The notification LED 33 irradiates light toward the sensor window member 373d side. The notification LED 33 is configured by, for example, an LED (Light Emitting Diode).

  The light guide member 323 is disposed between the notification LED 33 and the sensor window member 373d. The light guide member 323 is separated from the notification LED 33 and is disposed on the light irradiation direction S side of the notification LED 33. The light guide member 323 is formed in a cylindrical shape and extends in the light irradiation direction S of the notification LED 33. The light guide member 323 enters the light emitted from the notification LED 33 from the rear end 323a, guides it in the irradiation direction S, and emits the light from the front end 323b. The light guide member 323 is made of, for example, an acrylic resin.

  The light guide member 323, the notification LED 33, and the sensor substrate 322 are arranged between the sensor window member 373 d and the sensor substrate 322 in the light irradiation direction S of the notification LED 33 from the sensor window member 373 d side. The LED 33 and the sensor substrate 322 are arranged in this order.

The sensor 32 includes a light emitting unit 32a and a light receiving unit 32b. The light emitting unit 32a is arranged on one side of the notification LED 33 in the left-right direction X (left side of the left-right direction X in FIGS. 4 and 5), and the light receiving unit 32b is on the other side of the notification LED 33 in the left-right direction X (FIGS. 4 and 5). 5 on the right side in the left-right direction X). In other words, the light emitting unit 32a and the light receiving unit 32b are arranged adjacent to both sides of the notification LED 33 across the notification LED 33 in the left-right direction X.
An example of the sensor 32 is an infrared sensor. The sensor 32 emits light from the light emitting unit 32a, and the light receiving unit 32b receives reflected light from the detected object such as a human hand by the emitted light, and whether or not the detected object is within a predetermined detection range. Is detected.

  The light emitting unit side lens 324a is disposed between the light emitting unit 32a and the sensor window member 373d. The light emitting unit side lens 324a is spaced apart from the light emitting unit 32a and is disposed on the light emitting direction side of the light emitting unit 32a.

  The light receiving unit side lens 324b is disposed between the light receiving unit 32b and the sensor window member 373d. The light receiving unit side lens 324b is arranged on the light side that is separated from the light receiving unit 32b and enters the light receiving unit 32b in the light receiving unit 32b.

  The slit plate 325 is disposed on the front side (sensor window member 373d) of the light emitting unit 32a of the sensor 32 and the notification LED 33. The slit plate 325 is formed in a plate shape parallel to the sensor substrate 322. The slit plate 325 extends in the left-right direction X (direction orthogonal to the light irradiation direction S of the notification LED 33). The slit plate 325 extends so as to connect the space between the light emitting unit 32 a and the light emitting unit side lens 324 a of the sensor 32 and the space between the notification LED 33 and the light guide member 323 in the left-right direction X.

As shown in FIG. 5, the slit plate 325 includes a light emitting unit side slit 325a and a notification LED side slit 325b. The light emitting unit side slit 325a and the notification LED side slit 325b are formed in a slit shape so as to narrow the light irradiation range of the light emitting unit 32a or the notification LED 33.
The light emitting portion side slit 325a is disposed between the light emitting portion 32a of the sensor 32 and the light emitting portion side lens 324a, and is formed in a slit shape extending in the right-left direction X and the direction orthogonal to the irradiation direction S of the notification LED 33.
The notification LED side slit 325 b is disposed between the notification LED 33 and the light guide member 323 and is formed in a slit shape extending in the left-right direction X.

According to the water soap dispenser 3 according to the present embodiment described above, the following effects can be obtained.
The water soap discharge device 3 according to the present embodiment is a water soap discharge device 3 including a sensor unit 320 in which a sensor unit 32 having a light emitting unit 32a and a light receiving unit 32b is arranged. And a light guide member 323 disposed on the light irradiation direction S side of the notification LED 33.
That is, in the sensor unit 320 of the present embodiment, when the notification LED 33 is disposed in the sensor unit 320, the light guide member 323 is disposed on the light irradiation direction S side in the notification LED 33.

Therefore, the light of the notification LED 33 can be guided forward by the light guide member 323 in a state where the notification LED 33 is disposed on the back side of the sensor unit 320. Thereby, the light from the notification LED 33 can be guided to a position that is easily visible to the administrator who performs the maintenance work. Therefore, the visibility of the light irradiated from the notification LED 33 can be ensured.
Further, since the notification LED 33 can be disposed on the back side of the sensor unit 320, a space for disposing the notification LED 33 need not be provided on the front end side (front side, front side) of the sensor unit 320. For this reason, the sensor unit 320 can be compactly formed because it is not necessary to provide a space for disposing the notification LED 33 in addition to a space for disposing other members on the front end side (front side, near side) of the sensor unit 320.
Therefore, according to the water soap ejection device 3 according to the present embodiment, the sensor unit 320 can be formed compactly while ensuring the visibility of the light emitted from the notification LED 33.

  Further, in the water soap dispenser 3 according to the present embodiment, the notification LED 33, the light emitting unit 32 a, and the light receiving unit 32 b are arranged on one sensor substrate 322. Therefore, since the notification LED 33, the light emitting unit 32a, and the light receiving unit 32b are arranged on one sensor substrate 322, the sensor unit 320 can be made compact. Moreover, since it arrange | positions on one sensor board | substrate 322, the cost which a sensor board requires can be reduced rather than using two sensor boards.

  Moreover, in the water soap discharge apparatus 3 which concerns on this embodiment, alerting | reporting LED33, the light emission part 32a, and the light-receiving part 32b are arrange | positioned along with. Therefore, since the notification LED 33, the light emitting unit 32a, and the light receiving unit 32b are arranged in a line, the sensor unit 320 can be formed more compactly than when the notification LED 33, the light emitting unit 32a, and the light receiving unit 32b are not arranged side by side.

  Moreover, in this embodiment, the light emission part 32a, alerting | reporting LED33, and the light-receiving part 32b are arrange | positioned in this order. Therefore, by disposing the notification LED 33 between the light emitting unit 32a and the light receiving unit 32b, light emitted from the notification LED 33 can be emitted at a conspicuous position in the sensor unit 320.

  Further, in the water soap dispenser 3 according to the present embodiment, the sensor window member 373d is disposed on the inclined surface portion 373. Therefore, the notification LED 33 can be disposed at a position that is difficult for the user of the water soap dispenser 30 who does not want to visually recognize the light from the notification LED 33, and can be visually recognized by bending slightly for the administrator who performs the maintenance work. Can be placed.

The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the embodiment, in order to adjust the intensity of the light guided to the notification LED 33, the surface roughness of the tip surface of the light guide member 323 can be processed.

  Moreover, in the said embodiment, although the sensor board | substrate 322 was comprised by one, it is not limited to this. For example, two or more sensor substrates may be configured.

  Moreover, in the said embodiment, the light emission part 32a of the sensor 32, alerting | reporting LED33, and the light-receiving part 32b of the sensor 32 are changed from one side (left side in the paper surface of FIG.4 and FIG.5) to the other side (FIG.4 and FIG.4). Although they are arranged in this order toward the right side in FIG. 5, the arrangement order is not limited to this, and can be arranged in any order. For example, the light emitting unit 32a and the light receiving unit 32b may be arranged next to each other, and the notification LED 33 may be arranged at either one of the both sides or the other side, and the order of the above embodiments is reversed. The light receiving unit 32b of the sensor 32, the notification LED 33, and the light emitting unit 32a of the sensor 32 may be arranged in this order.

  Moreover, in the said embodiment, although alerting | reporting LED33 and the light guide member 323 were demonstrated in the water soap discharge instrument of the water soap discharge apparatus, it is not limited to this. For example, the present invention may be applied to a light source and a light guide member such as an automatic faucet for hand washing, a notification LED used in a cleaning device used in a toilet, and the like. Further, it may be a light source that is not intended for notification and is simply used as hand illumination.

  In the above embodiment, the front end surface portion 372 extends in the vertical direction. However, the vertical direction may be a vertical direction or a slightly inclined direction from the vertical direction.

3 Water soap dispenser (ejection device)
32 Sensor (Sensor part)
32a Light emitting part 32b Light receiving part 33 Notification LED (light source part)
34 Discharge port part (discharge part)
320 sensor unit 322 sensor substrate (substrate)
323 Light guide member 372 Tip surface portion 373 Inclined surface portion 373d Sensor window member (sensor window)

Claims (4)

A discharge device including a sensor unit in which a sensor unit having a light emitting unit and a light receiving unit is disposed,
A light source unit that is disposed in the sensor unit and emits light;
A light guide member disposed on a light irradiation direction side of the light source unit.   The ejection device according to claim 1, wherein the light source unit, the light emitting unit, and the light receiving unit are disposed on one substrate.   The ejection device according to claim 1, wherein the light source unit, the light emitting unit, and the light receiving unit are arranged side by side. The sensor unit has a sensor window disposed in front of the light emitting unit and the light receiving unit,
The discharge device further includes a discharge unit for discharging liquid,
The discharge device according to any one of claims 1 to 3, wherein the discharge portion includes an inclined surface portion that is inclined and extends downward toward the rear and on which the sensor window is disposed.

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