vacuum cleaner

Abstract

To provide a vacuum cleaner capable of improving dust recognition property.SOLUTION: A vacuum cleaner 100 includes: a fan motor for generating suction force; a suction port body 200 for sucking dust sucked by the fan motor; and a dust case 2 (dust collection part) communicating with the suction port body 200 so as to collect sucked dust. The suction port body 200 includes an irradiation part 202 for irradiating a cleaned surface. The irradiation part 202 irradiates a floor surface with light in a state where green light is mixed with white light.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a vacuum cleaner. [Background technology]

[0002] For example, when cleaning with a vacuum cleaner, the user visually checks the surface to be cleaned, such as the floor or shelf, and collects dust and other debris. If the visibility of the debris from the user's perspective is low, some areas may be left uncleaned, or cleaning efficiency may decrease due to cleaning areas that do not contain any debris. Therefore, a technology described in Patent Document 1 is known as a technology for improving the visibility of debris on the surface to be cleaned.

[0003] Patent Document 1 describes an electric vacuum cleaner that includes a suction body having an inlet for sucking in gas containing dust, and a light-emitting diode arranged on the suction body, and the light-emitting diode is arranged on the suction body so that when the suction body is placed in contact with the suction body or approximately parallel to the floor surface, the irradiation range of light emitted from the light-emitting diode and irradiated to the outside of the suction body expands downward from a direction extending approximately parallel to the floor surface. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2008 / 035478 Summary of the Invention [Problem to be solved by the invention]

[0005] The technology described in Patent Document 1 does not take into consideration the range of illumination of the light-emitting diode on the floor surface, which results in the problem that the emitted light does not reach the surface to be cleaned sufficiently, causing dust to be overlooked.

[0006] SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a vacuum cleaner that can improve the range of light irradiation on the surface to be cleaned and improve the visibility of dust. [Means for solving the problem]

[0007] The vacuum cleaner of the present invention is an electric vacuum cleaner comprising: a fan motor that generates suction force; a suction body that sucks up dust sucked by the fan motor; and a dust collecting unit that communicates with the suction body and collects the sucked up dust, wherein the suction body comprises an illumination unit that illuminates a surface to be cleaned; The irradiation unit includes a lens including a central lens and an outer lens arranged outward in the left-right direction from the central lens, and the outer lens is inclined so as to face outward in the left-right direction with respect to the front of the suction mouth body, The illumination unit illuminates the floor surface with a mixture of green and white light. 。 [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a vacuum cleaner that can improve the recognition of dust. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of the appearance of an electric vacuum cleaner according to a first embodiment of the present invention. [Figure 2] 1 is a top view of an operation unit provided in an electric vacuum cleaner according to a first embodiment of the present invention. [Figure 3] FIG. 1 is a perspective view of a suction mouthpiece according to a first embodiment of the present invention, as viewed from above. [Figure 4] FIG. 1 is a perspective view of a suction mouthpiece according to a first embodiment of the present invention, as viewed from below. [Figure 5] FIG. 10 is a perspective view of the suction mouth body from above with the upper case and lens fixing member removed. [Figure 6] FIG. 6 is a perspective view of the suction mouthpiece in FIG. 5, showing a state in which the lens fixing member is attached. [Figure 7] FIG. 10 is an enlarged side view of the front part of the suction mouth body with the upper case and bumper removed. [Figure 8] FIG. 2 is a perspective view of the upper case as seen from the rear side. [Figure 9] This is a color wheel of the Munsell color system that describes the hue of the light that is emitted. [Figure 10] 1 is a block diagram of an electric vacuum cleaner according to a first embodiment of the present invention. [Figure 11] 1 is a front view of a lens fixing member according to a first embodiment of the present invention, as viewed from the front. [Figure 12] FIG. 2 is a rear view of the lens fixing member according to the first embodiment of the present invention, as seen from the rear. [Figure 13] FIG. 2 is a bottom view of the lens fixing member according to the first embodiment of the present invention, as viewed from below. [Figure 14] FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. [Figure 15] FIG. 10 is a front view of a lens fixing member according to a second embodiment of the present invention. [Figure 16] FIG. 10 is a perspective view of a lens fixing member according to a second embodiment of the present invention, as viewed from behind. [Figure 17] FIG. 10 is a perspective view of a lens fixing member according to a third embodiment of the present invention, as viewed from the front. [Figure 18] FIG. 10 is a perspective view of a lens fixing member according to a third embodiment of the present invention, as viewed from behind. [Figure 19] 19 is a cross-sectional view taken along line XIX-XIX in FIG. 18. [Figure 20] FIG. 10 is a front view of a lens fixing member according to a fourth embodiment of the present invention, as viewed from the front. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Like elements are designated by like reference numerals and similar descriptions will not be repeated.

[0011] The various components of the present invention do not necessarily have to be independent entities, and it is acceptable for one component to be made up of multiple members, for multiple components to be made up of one member, for one component to be part of another component, or for part of one component to overlap with part of another component. [Example]

[0012] FIG. 1 is a perspective view of the exterior of a vacuum cleaner 100 according to a first embodiment of the present invention. The vacuum cleaner 100 can be used in various forms, such as a handheld form or a stick form, and can clean surfaces (not shown) such as floors and the tops of shelves. In the following example, the surface to be cleaned is assumed to be, for example, flooring. The vacuum cleaner 100 is not limited to the example shown in the figure, and may also be a robot vacuum cleaner. The vacuum cleaner 100 may also be a canister type, a paper bag type, or a cyclone type.

[0013] The support base 70 on which the vacuum cleaner 100 is stored stores the vacuum cleaner 100 in a stick state with the extension tube 300 (accessory) and standard suction nozzle body 200 (accessory) connected to it, and is configured with a base 71 and a stand 72. Two electrical systems 261, 261 (FIG. 10) that connect the control device 500 (FIG. 10) and the irradiation unit 202 (FIG. 3) are arranged inside the peripheral wall of the extension tube 300. The vacuum cleaner 100 can be used by connecting a small suction nozzle (accessory), a broom-type suction nozzle (accessory), an extension hose (accessory), or the like, all of which are not shown. The suction nozzle body 200 is a power brush type in which a rotating brush 201 (FIG. 4) is rotated by a brush motor 233 (FIG. 5).

[0014] The electric vacuum cleaner 100 comprises a vacuum cleaner main body 1, a suction body 200, a dust case 2 (dust collection section), and a storage battery 3 that stores DC power. The vacuum cleaner main body 1 comprises a main body 10, a motor case 11, and a handle 12. The main body 10 is connected to the suction body 200 via an extension tube 300, and dust on the floor is sucked up through the suction body 200 by the suction force generated by a fan motor (not shown) housed in the motor case 11. The sucked-up dust is collected in the dust case 2 that communicates with the suction body 200. Power used by the motor is supplied by the storage battery 3. A control device 500 (FIG. 10), which will be described later, is provided in the vacuum cleaner main body 1 (specifically, the main body 10). A user can clean the floor by gripping the handle 12 and moving the suction body 200 in the desired direction. The cleaner body 1 is provided with an operating section 121 including buttons 124 and 125 (first operating section, FIG. 2) on the front side of the handle 12 (FIG. 1).

[0015] 2 is a top view of an operating unit 121 provided in the vacuum cleaner 100 according to the first embodiment of the present invention. The operating unit 121 includes buttons 124 and 125 for changing the operation mode by controlling the rotation speed of the fan motor housed in the motor case 11 (FIG. 1) to vary the suction force through the suction port 203 (FIG. 4). The button 124 drives the motor to achieve a predetermined suction force. The button 125 drives the motor to achieve a suction force stronger than the suction force when the button 124 is pressed.

[0016] When the motor housed in motor case 11 (FIG. 1) and rotating brush 201 (FIG. 4) are both stopped, pressing buttons 124, 125 drives the motor to provide the corresponding suction force. Rotating brush 201 rotates at the same rotation speed in either case. Furthermore, while vacuum cleaner 100 is operating, pressing buttons 124, 125 for a predetermined time or longer (for example, for one second or longer) within a predetermined time period (for example, within five seconds) increases the driving force of each button for a predetermined time period.

[0017] Operation unit 121 includes lamp 122 that flashes to indicate a decrease in the remaining battery charge of storage battery 3 (FIG. 1), and lamp 123 that flashes to indicate a clogged filter (not shown) housed in dust case 2 upon detecting a decrease in suction power. Operation unit 121 also includes button 126 that stops the operation of vacuum cleaner 100 by stopping the drive of both the motor housed in motor case 11 (FIG. 1) and rotating brush 201 (FIG. 4).

[0018] As will be described in more detail later, suction mouth body 200 (Fig. 3) is equipped with illuminating unit 202 (Fig. 3) that can irradiate light toward the surface to be cleaned, and illuminating unit 202 emits light when buttons 124, 125 corresponding to the current operating mode are pressed. When buttons 124, 125 are pressed and the motor and rotating brush 201 are operating, illuminating unit 202 emits light and illuminates the floor surface, making it easier to recognize dirt on the floor surface and improving the operability of vacuum cleaner 100.

[0019] Next, the configuration of the suction body 200 will be described. Fig. 3 is a perspective view of the suction body according to Example 1 of the present invention as seen from above, and Fig. 4 is a perspective view of the suction body according to Example 1 of the present invention as seen from below. Fig. 5 is a perspective view of the suction body as seen from above with the upper case and lens fixing member removed, and Fig. 6 is a perspective view of the suction body in Fig. 5 with the lens fixing member attached. Fig. 7 is an enlarged side view of the front part of the suction body as seen from above with the upper case and bumper removed, and Fig. 8 is a perspective view of the upper case as seen from the back side.

[0020] Suction body 200 comprises lower case 241 having suction port 203 that opens toward the surface to be cleaned, upper case 242 arranged above lower case 241, and connecting pipe 205 arranged behind lower case 241 and upper case 242. An air passage 204 that communicates with suction port 203 is formed inside connecting pipe 205. A bumper 248 is provided between lower case 241 and upper case 242 to keep lower case 241 and upper case 242 airtight and to absorb impact when suction body 200 collides with furniture or the like.

[0021] The suction port 203 of the lower case 241 is provided with a rotating brush 201 that is driven to rotate by a brush motor 233. Below the lower case 241 are provided wheels 206 and 207 for contacting the surface to be cleaned and moving the suction body 200, and a floor switch 234 for stopping the rotation of the rotating brush 201 when the suction body 200 leaves the surface to be cleaned.

[0022] An irradiation unit 202 configured to be able to irradiate light toward the front side is provided in front of the suction mouth body 200. The irradiation unit 202 is composed of a plurality of LEDs 221 (LEDs 2211a, 2211b, 2212a, 2212b) as light-emitting units, and a plurality of lenses 223 (lenses 2231a, 2231b, 2232a, 2232b) that are arranged in front of the plurality of LEDs 221 and correspond to each of the plurality of LEDs 221. The plurality of lenses 223 (lenses 2231a, 2231b, 2232a, 2232b) are fixed to a lens fixing member 220. This lens fixing member 220 constitutes a part of the irradiation unit 202.

[0023] The multiple LEDs 221 (LEDs 2211a, 2211b, 2212a, 2212b) are mounted on a substrate 222. The substrate 222 is supported by a support 231 so that the flat surface of the substrate 222 stands upright in the vertical direction. The support 231 is formed on the lower case 241 so as to sandwich both longitudinal ends of the substrate 222 from the front and back. Furthermore, as shown in FIG. 7 , the support 231 is arranged so that its upper portion is inclined at a predetermined angle θ1 relative to its lower portion so that it is positioned in front of the suction body 200. Similarly, the substrate 222 attached to the support 231 is arranged so that its upper portion is inclined at a predetermined angle θ1 relative to its lower portion so that it is positioned in front of the suction body 200.

[0024] In Example 1, the flat surface of the substrate 222 is erected in the vertical direction, allowing the multiple LEDs 221 to face forward. Furthermore, the substrate 222 does not extend across the entire width of the suction body 200 in the left-right direction, and is therefore disposed in the center. Air flows through the center of the suction body 200 toward the air passage 204 inside the connecting pipe 205.

[0025] A plurality of recesses 243 are formed on the upper end surface of the substrate 222 .

[0026] The lens fixing member 220 is arranged so that its front flat portion stands upright in the vertical direction. A plurality of extension portions 2201 extending toward the rear of the suction body 200 are formed above the lens fixing member 220, and each of the plurality of extension portions 2201 has a plurality of protrusions 2202 extending from the center of the extension portion 2201 toward the rear of the suction body 200. Shoulders 2203 are formed on both the left and right sides of the protrusions 2202. A protrusion 2204 protruding downward is formed below the lens fixing member 220.

[0027] When fixing the lens fixing member 220 to the lower case 241 of the suction mouth body 200, first, the protrusion 2204 of the lens fixing member 220 is inserted into the groove 244 formed in the lower case 241. This supports the lens fixing member 220 on the lower case 241. Then, the convex portion 2202 of the lens fixing member 220 is inserted into the recess 243 of the substrate 222. After that, the upper case 242 is attached from above the lower case 241. As shown in FIG. 8, the rear surface of the upper case 242 is formed with a groove 245 recessed upward, a plurality of substrate restricting ribs 246 protruding downward from above the rear surface of the upper case 242 behind the groove 245, and a plurality of lens fixing member restricting ribs 247 protruding downward from above the rear surface of the upper case 242 in front of the groove 245.

[0028] When the convex portion 2202 of the lens fixing member 220 is inserted into the concave portion 243 of the substrate 222, left-right movement of the lens fixing member 220 is restricted. Furthermore, shoulder portions 2203 formed on both the left and right sides of the convex portion 2202 come into contact with the front flat portion of the substrate 222, thereby restricting rearward movement of the lens fixing member 220. Furthermore, when the upper case 242 is attached to the lower case 241, the upper end of the substrate 222 is inserted into the groove portion 245, and multiple substrate restricting ribs 246 are positioned behind the flat portion of the substrate 222, thereby restricting rearward movement of the substrate 222. Furthermore, when the upper case 242 is attached to the lower case 241, the lens fixing member 220 is covered by the upper case 242, thereby restricting upward movement of the lens fixing member 220, and multiple lens fixing member restricting ribs 247 are positioned behind the flat portion of the lens fixing member 220, thereby restricting rearward movement of the substrate 222. When suction body 200 is moved to clean the surface to be cleaned, lens fixing member 220 may collide with furniture or the like, and the impact force may be transmitted to base plate 222 via extension portion 2201 and shoulder portion 2203, potentially damaging base plate 222. However, in Example 1, multiple lens fixing member restricting ribs 247 are provided on the rear surface of upper case 242, so that the impact force received by lens fixing member 220 can be received by lens fixing member restricting ribs 247, and the impact force received by lens fixing member 220 can be prevented from being transmitted to base plate 222 and damaging base plate 222.

[0029] As described above, according to the configuration of the first embodiment, the positions of the plurality of LEDs 221 (LEDs 2211a, 2211b, 2212a, 2212b) and the plurality of lenses 223 (lenses 2231a, 2231b, 2232a, 2232b) are fixed and a predetermined distance is maintained, so that variation in the light from the LEDs 221 (LEDs 2211a, 2211b, 2212a, 2212b) incident on the lenses 223 can be suppressed and the irradiation range on the surface to be cleaned can be stabilized. Furthermore, even if the lens fixing member 220 receives an impact force, the impact can be received by the lens fixing member restricting rib 247, so that change in the distance between the plurality of LEDs 221 (LEDs 2211a, 2211b, 2212a, 2212b) and the plurality of lenses 223 (lenses 2231a, 2231b, 2232a, 2232b) can be suppressed.

[0030] In Example 1, as described above, the substrate 222 is arranged so that its upper portion is inclined at a predetermined angle θ1 relative to its lower portion so that it is positioned in front of the suction body 200. Accordingly, the center line L1 of the lens 2232b is inclined at a predetermined angle θ2 relative to the horizontal line so that its front portion faces downward relative to its rear portion, as shown in FIG. 7. This configuration allows the light from the LED 2212b passing through the lens 2232b to be irradiated toward the surface to be cleaned in Example 1. Although not shown, the center lines of the lenses 2231a, 2231b, and 2232a are also inclined in a similar manner so that they face the surface to be cleaned.

[0031] In Example 1, a plurality of LEDs 2211a, 2211b and LEDs 2212a, 2212b are provided, which are arranged alternately. In Example 1, white LEDs are used for LEDs 2211a, 2211b, and green LEDs are used for LEDs 2212a, 2212b. That is, from left to right in the left-right direction (width direction) of the suction body 200, the LEDs are arranged in the order green-white-green-white-green-white-green. In other words, the LEDs arranged in the suction body 200 are arranged so that a white LED is located in the center and green LEDs are located on both the left and right sides of the white LED, forming a green-white-green combination.

[0032] In Example 1, multiple color LEDs, including green and white, are turned on simultaneously, and the floor surface is irradiated with light from a mixture of multiple color LEDs. The reason for selecting multiple color LEDs, including green and white, will be explained below.

[0033] Figure 9 shows a hue circle of the Munsell color system (hereinafter referred to as the Munsell color circle where appropriate) that describes the hue of the emitted light. The Munsell color circle is a circular Munsell color chart with a center P0, and in the example shown, there are 20 hues, with the circumference divided into 20 equal parts. The symbols on the circumference represent hues (synonymous with "color"), with R representing red, Y representing yellow, G representing green, B representing blue, and P representing purple.

[0034] For example, if the irradiating unit 202 irradiates light of an absorption color that is easily absorbed by the surface to be cleaned, the surface to be cleaned will absorb the light, making it easier for the user to see the light reflected by the dirt and to confirm the location of the dirt. Therefore, for example, the irradiating unit 202 irradiates light of a non-similar color, which has a hue that belongs to a region of the 20 hues on the Munsell color wheel shown in Fig. 9 as the light of the absorption color of the surface to be cleaned, outside the region between the two hues adjacent to the hue corresponding to the color of the surface to be cleaned. By irradiating light of a non-similar color, the surface to be cleaned will be more likely to absorb the light, suppressing reflection and making the dirt more noticeable, thereby improving the visibility of the dirt.

[0035] For example, for a hue C1 of the surface to be cleaned, the 20 hues adjacent to hue C1 are hues 5YR and 10YR. If the area between hue 5YR and hue 10YR, including hue C1, is defined as being similar in color to the hue C1 of the surface to be cleaned, the irradiation unit 202 irradiates light of a non-similar color, which is a hue belonging to the area other than the similar color. Note that when a single color light is irradiated, any one color can be selected from the non-similar colors, and when multiple colors of light L are irradiated, any two or more colors can be selected.

[0036] In the first embodiment, the irradiating unit 202 simultaneously lights up LEDs of multiple colors, including green (5G) and white, and irradiates the floor surface with light that is a mixture of the LEDs of multiple colors.

[0037] For example, if the surface to be cleaned is wooden flooring, the color is generally close to the color of wood between yellow (5Y) and purple (5P). Therefore, if light of a hue other than the range between 5Y and 5P, specifically light of a hue between yellow-green (7.5GY) and blue (5B), for example, is irradiated, the color difference between the dirt and the surface to be cleaned can be increased, making the dirt more noticeable. Therefore, in Example 1, a green LED is provided as the irradiating unit 202.

[0038] Fig. 10 is a block diagram of the electric vacuum cleaner according to the first embodiment of the present invention. The buttons 124, 125 of the operation unit 121 and the storage battery 3 are connected to the control device 500 of the vacuum cleaner body 1. When the buttons 124, 125 of the operation unit 121 are pressed, the control device 500 receives power from the storage battery 3 and supplies the power to the suction body 200 through two power supply systems 261, 261 wired to the extension tube 300. The suction body 200 receives power at the connection terminal 251 and supplies the power to the board 222. The LED 2212 emits green light using the power supplied to the board 222. On the other hand, the LEDs 2211a, 2211b emit white light using the power adjusted by the input adjustment unit 2215. The LEDs 2212a and 2212b emit green light when the substrate 222 receives the maximum power, while the LEDs 2211a and 2211b emit white light when the power is reduced from the maximum power. Simultaneously activating the white LEDs 2211a and 2211b and the green LEDs 2212a and 2212b at maximum power results in color unevenness, reducing the visibility of dust. Therefore, in the first embodiment, the input adjustment unit 2215 adjusts the power supplied to the white LEDs 2211a and 2211b to suppress color unevenness. Because the white LEDs 2211a and 2211b and the green LEDs 2212a and 2212b vary in the amount of light emitted, the input adjustment unit 2215 individually adjusts the power supplied to the white LEDs 2211a and 2211b by changing the resistance value. This configuration enables the first embodiment to obtain light with suppressed color unevenness.

[0039] Next, the configuration of the lens fixing member 220 that constitutes a part of the irradiation unit 202 will be described. Fig. 11 is a front view of the lens fixing member according to the first embodiment of the present invention as seen from the front, Fig. 12 is a rear view of the lens fixing member according to the first embodiment of the present invention as seen from the rear, Fig. 13 is a bottom view of the lens fixing member according to the first embodiment of the present invention as seen from below, and Fig. 14 is a cross-sectional view taken along line XIV-XIV in Fig. 12.

[0040] As described above, in Example 1, white light is emitted from the lenses 2231a and 2231b, and green light is emitted from the lenses 2232a and 2232b. The lenses 2231a and 2231b and the lenses 2232a and 2232b are formed in a conical shape so that the diameter increases from the light incident side (rear side) to the light emission side (front side). The lenses 2231a and 2231b and the lenses 2232a and 2232b have different lens diameters on the light emission side (front side). That is, the diameter D1 of the emission side (front side) of the lenses 2231a and 2231b is larger than the diameter D2 of the emission side (front side) of the lenses 2232a and 2232b (D1>D2). Furthermore, lenses 2231a, 2231b and lenses 2232a, 2232b are concave from the irradiation side (front side) toward the incident side (rear side), and the radii of curvature 2231aR, 2231bR on the irradiation side (front side) of lenses 2231a, 2231b that emit white light are larger than the radii of curvature 2232aR, 2232bR on the irradiation side (front side) of lenses 2232a, 2232b that emit green light (2231aR>2232aR, 2231bR>2232bR).

[0041] Therefore, the lenses 2231a and 2231b that emit white light have a lower refractive index and thus a higher degree of light collection. On the other hand, the lenses 2232a and 2232b that emit green light have a smaller radius of curvature than the lenses 2231a and 2231b that emit white light, resulting in a higher refractive index and a lower degree of light collection. In other words, the lenses 2232a and 2232b that emit green light have a wider angle of view than the lenses 2231a and 2231b that emit white light. In Example 1, lenses with different angles of view are used in combination to diffuse the green light absorbed by the surface to be cleaned and narrow the white light, thereby improving the visibility of dust. As described above, the power supplied to the white LEDs 2211a and 2211b is adjusted by the input adjustment unit 2215, so the green LEDs 2212a and 2212b are not over-irradiated, thereby suppressing color unevenness.

[0042] As described above, according to the first embodiment, the white LEDs 2211a, 2211b and the green LEDs 2212a, 2212b are turned on simultaneously to illuminate the surface to be cleaned. Therefore, for example, on wooden floors, the light from the green LEDs 2212a, 2212b is easily absorbed by the flooring to suppress reflection, and the light from the white LEDs 2211a, 2211b makes dirt more noticeable, so that it is possible to provide a vacuum cleaner with improved dirt visibility. [Example]

[0043] A second embodiment of the present invention will be described with reference to Figures 15 and 16. The same components as those in the first embodiment are designated by the same reference numerals, and detailed descriptions thereof will be omitted. Figure 15 is a front view of a lens fixing member according to the second embodiment of the present invention, and Figure 16 is a perspective view of the lens fixing member according to the second embodiment of the present invention as seen from the rear. The second embodiment differs from the first embodiment in the shape of the lenses arranged in the left-right direction.

[0044] In Example 1, all of the lenses placed on the lens fixing member 220 were formed in a conical shape, but in Example 2, the lens in the center of the suction mouth body 200 was formed in a conical shape, and the lenses on both sides of the conical lens were formed in a horizontally elongated shape extending in the left-right direction of the suction mouth body 200.

[0045] Horizontally elongated lenses 2233 are formed on both the left and right sides of the cone-shaped lenses 2231a and 2232a. An incident recess 2233d extending in the left-right direction is formed behind (on the back surface) the horizontally elongated lens 2233. A plurality of LEDs (white LED 2211b, green LED 2212b) other than the LEDs 2211a and 2212a facing the lenses 2231a and 2232a face the incident recess 2233d. The white light and green light incident from the horizontally elongated lens 2233 are combined and irradiated from the front of the lens fixing member 220 across the entire width of the horizontally elongated lens 2233, irradiating the vicinity of the suction mouth body 200. Meanwhile, the light irradiated from the lenses 2231a and 2232a arranged in the center of the lens fixing member 220 irradiates a position farther away than the light irradiated by the horizontally elongated lens 2233.

[0046] According to the second embodiment, conical lenses 2231a and 2232a are arranged in the center of lens fixing member 220, and horizontally elongated lenses 2233 extending in the left-right direction are arranged on both the left and right sides of lens fixing member 220, thereby improving the visibility of dust located near suction body 200 and dust located far from suction body 200.

[0047] Furthermore, according to Example 2, by arranging horizontally elongated lenses 2233 extending in the left-right direction on both the left and right sides of the lens fixing member 220, light can be irradiated across the width of the lens fixing member 220, making it easier to recognize the width of the suction mouth body 200. [Example]

[0048] Example 3 of the present invention will be described with reference to Figures 17 and 18. The same components as in Example 1 are designated by the same reference numerals, and detailed description thereof will be omitted. Figure 17 is a perspective view of a lens fixing member according to Example 3 of the present invention as seen from the front, Figure 18 is a perspective view of the lens fixing member according to Example 3 of the present invention as seen from the rear, and Figure 19 is a cross-sectional view taken along line XIX-XIX in Figure 18. Example 3 differs from Example 1 in the shape of the lenses arranged on both the left and right sides of lens fixing member 220.

[0049] Of the multiple lenses, the center lines of the radii of curvature 2231aR, 2232aR of the irradiation side (front side) of the lens 2231a and lens 2232a arranged in the center of the suction body 200 face forward of the suction body 200.

[0050] The center lines of radii of curvature 2231cR, 2232cR on the irradiation side (front side) of lenses 2231c and 2232c arranged on both the left and right sides of the lenses (lens 2231a and lens 2232a) arranged in the center of suction body 200 are inclined by predetermined angles θ3 and θ4, respectively, with respect to the front of suction body 200 so as to face outward in the left and right directions of suction body 200. In Example 3, angles θ3 and θ4 are set to 15 degrees. White LED light is emitted from lens 2231c, and green LED light is emitted from lens 2232c.

[0051] According to the third embodiment, the center lines of the radii of curvature 2231cR, 2232cR on the irradiation side (front side) of the lenses 2231c and 2232c are inclined by angles θ3 and θ4, respectively, relative to the front of the suction body 200 so that they face outward in the left and right directions of the suction body 200, and the white LED 2211b and the green LED 2212b are turned on simultaneously to illuminate the surface to be cleaned. This improves the visibility of dirt on both the left and right ends of the suction body 200, and makes it possible to provide an electric vacuum cleaner that can reduce the amount of dirt left behind on both the left and right ends of the suction body 200. [Example]

[0052] Example 4 of the present invention will be described with reference to Fig. 20. The same components as in Example 1 are given the same reference numerals, and detailed description thereof will be omitted. Fig. 20 is a front view of a lens fixing member according to Example 4 of the present invention, as seen from the front. Example 4 differs from Example 1 in that the surface of lens fixing member 220 is textured.

[0053] 20, at least the surface of the lens fixing member 220 on the irradiation side is textured to form fine irregularities, giving the surface of the lens fixing member 220 a cloudy appearance. In Example 3, as in Example 1, white LED light and green LED light are emitted simultaneously, and the power supplied to the white LED light is adjusted to suppress color unevenness, but when the white LED light and green LED light are incident on the textured lens fixing member 220, the light is diffused by the finely formed irregularities, and the white LED light and green LED light mix together.

[0054] In Example 4, when the surface of the lens fixing member 220 is embossed, the embossing is strengthened at the central portion 220a of the lens fixing member 220, and weakened from the central portion 220a toward the outer portion 220b located on the left-right outer side of the suction mouth body 200.

[0055] According to the fourth embodiment, the surface of the lens fixing member 220 is textured, so that light with less color unevenness can be irradiated onto the surface to be cleaned.

[0056] When the embossing is performed, it may be performed uniformly over the entire surface of the lens fixing member 220.

[0057] In the above-described first to fourth embodiments, white LED light and green LED light are used, but for example, all the LEDs 221 may be white LEDs and some of the lenses 2232a, 2232b, and 2232c may be green lenses.

[0058] It should be noted that the present invention is not limited to the above-described embodiment, but includes various modifications. The above-described embodiment has been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to an embodiment having all of the described configurations. [Explanation of symbols]

[0059] 1...vacuum cleaner body, 2...dust case, 3...storage battery, 10...main body, 11...motor case, 12...handle, 70...support stand, 71...base, 72...stand, 100...electric vacuum cleaner, 121...operation unit, 122, 123...lamp, 124, 125, 126...button, 200...suction body, 201...rotating brush, 202...irradiation unit, 203...suction port, 204...air duct, 205...connecting pipe, 206, 207...wheel, 220...lens fixing member, 220a...central portion, 220b...outer portion, 2201...extension portion, 2202...convex portion, 2203...shoulder portion, 2204...protrusion portion, 221, 2211a, 2211b, 2212a, 2212 b...LED, 2215...input adjustment unit, 222...board, 223, 2231a, 2231b, 2231c, 2232a, 2232b...lens, 2231aR, 2231bR, 2231cR, 2232aR, 2232bR, 2232cR...radius of curvature, 2233...horizontal lens, 2233d...incident recess, 231...support unit, 233...brush motor, 234...floor switch, 241...lower case, 242...upper case, 243...recess, 244, 245...groove, 246...board restriction rib, 247...lens fixing member restriction rib, 248...bumper, 251...connection terminal, 261...electrical system, 300...extension tube, 500...control device

Claims

1. An electric vacuum cleaner comprising: a fan motor that generates suction force; a suction body that sucks up dust sucked by the fan motor; and a dust collecting unit that communicates with the suction body and collects the sucked up dust, The suction body includes an illumination unit that illuminates the surface to be cleaned, the irradiation unit includes a lens including a central lens and an outer lens disposed outward in the left-right direction from the central lens, The outer lens is inclined so as to face outward in the left-right direction with respect to the front of the suction mouth body, The vacuum cleaner is characterized in that the irradiating unit irradiates a floor surface with a mixture of green and white light.

2. In claim 1, the irradiation unit includes a plurality of light-emitting units that emit green and white light, The vacuum cleaner is characterized in that the plurality of light-emitting elements include a green light-emitting element and a white light-emitting element arranged adjacent to each other.

3. An electric vacuum cleaner comprising: a fan motor that generates suction force; a suction body that sucks up dust sucked by the fan motor; and a dust collecting unit that communicates with the suction body and collects the sucked up dust, The suction body includes an illumination unit that illuminates the surface to be cleaned, the irradiation unit includes a plurality of light-emitting units that emit green and white light, the irradiation unit includes a lens including a central lens and an outer lens disposed outward in the left-right direction from the central lens, The outer lens is inclined so as to face outward in the left-right direction with respect to the front of the suction mouth body, The vacuum cleaner is characterized in that the irradiation unit has a green light-emitting unit and a white light-emitting unit arranged adjacent to each other.

4. In claim 2 or 3, The plurality of light-emitting units are configured to simultaneously light up LEDs of a plurality of colors, including green and white.

5. In claim 2 or 3, The plurality of light emitting parts are arranged in white at the center and in green on both sides of the center.

6. In claim 2 or 3, The vacuum cleaner is characterized in that the plurality of light emitting units are arranged such that LEDs that emit green light and LEDs that emit white light are alternately arranged.

7. In claim 2 or 3, The lens receives light from the light-emitting unit and irradiates it from the front of the suction body toward the surface to be cleaned.

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