Extraction device and processing area

Abstract

Extraction device (100) for extracting dust particles comprising comprising a main body (110) with an extraction tunnel (112) having an intake opening and a discharge opening (130), wherein the dust particles occurring in front of the intake opening during operation can be captured and discharged from the discharge opening (130) through the extraction tunnel (112); a light arrangement (200) for illuminating a processing area (406), wherein the light arrangement (200) has a frame (210) along which at least one light element (220) is arranged, which extends substantially over the entire frame (210), wherein the frame (210) centrally encloses a viewing opening (230), wherein the light element (220) is directed towards the processing area (406) during operation; characterized by the fact that The light arrangement (200) for the light element (220) comprises at least one lens (224) by means of which the light of the light element (220) is directed.

Description

Field of invention

[0001] The invention relates to an extraction device for extracting dust particles and to such an extraction device having a processing area. State of the art

[0002] Extraction systems, particularly for dental workstations, are known from the prior art and are used especially during grinding operations to extract airborne grinding particles. When processing dental workpieces, it is also necessary to protect the operator, in particular, from the entry of grinding particles into their respiratory tract and eyes. Especially at high rotational speeds of the rotating grinding or milling tools, highly accelerated grinding particles are repeatedly released in an almost uncontrollable manner. These are often carried towards the operator, who must therefore wear at least eye and mouth protection. This protective equipment, however, provides insufficient protection and also makes working conditions more difficult or worse, particularly hindering unimpeded breathing and a clear field of vision. Additional protective shields can be used to provide further protection.However, this further restricts the field of vision and darkens the work area, thereby reducing product quality. Additional lighting can be used to illuminate the work area, but the simultaneous need for extraction and shielding components makes good illumination difficult. Furthermore, shadows are cast by the operator and these components, leading to uneven illumination of the work area and a deterioration of visibility. Ceiling-mounted lights are often positioned too far from the work area, resulting in insufficient illumination. Additionally, they cast shadows on workpieces with cavities that the operator needs to machine, as the light comes from above, and the operator rotates the workpiece to look into the cavities.With light sources that have a mounting arm attached to the worktable, the light also comes from above and creates the same shadows in cavities. If this light source is moved and rotated to better illuminate the cavities of the workpiece, it obstructs the worker's path or forces them into an unergonomic posture.

[0003] Solutions known from the prior art therefore offer poor occupational safety and at least limited visibility, resulting in low product quality. Furthermore, solutions known from the prior art are prone to malfunctions. Description of the invention

[0004] The object of the present invention is therefore to overcome the problems known from the prior art, i.e. to provide a robust solution that enables good occupational safety and good visibility, as well as leading to high product quality and a more ergonomic way of working.

[0005] The problem is solved by a suction device according to claim 1. Further features that further develop the invention are contained in the dependent claims.

[0006] An extraction device according to the invention for extracting dust particles comprises a main body with an extraction tunnel having an extraction opening and a discharge opening, wherein the dust particles occurring in front of the extraction opening during operation can be captured and discharged through the extraction tunnel from the discharge opening, preferably a coupling device for attaching the main body to a work area, a light arrangement for illuminating a processing area, in particular in the line of sight / direction of view of the operator on the workpiece to be processed, wherein the light arrangement has a frame along which at least one light element is arranged, preferably a plurality of light elements, which are in particular designed as LEDs, which extends substantially over the entire frame, wherein the frame centrally encloses a viewing opening, wherein the light element is directed towards the processing area during operation, andwherein the light arrangement for the light elements comprises a lens by means of which the light from the light elements is directed, in particular onto the processing area.

[0007] A single, elongated light element can be provided, adapted to the frame geometry, i.e., shaped in a curved form. Such a light element could be, for example, a light strip. Alternatively, several light elements can be provided, positioned side by side and following the frame geometry, e.g., several adjacent light elements, such as LEDs.

[0008] The frame surrounding the viewing opening in the center is arranged around the viewing opening.

[0009] According to the invention, a light element directed towards the processing area means that it illuminates the processing area. If several light elements are provided, they are preferably all directed towards the processing area.

[0010] According to the invention, the machining area is defined as the area in which the workpiece is machined, e.g. milled, while the working area can be, for example, a worktable or a workstation in a dental laboratory.

[0011] Parts or components of the extraction system that are located away from the work area during operation are described as being positioned at the top. Accordingly, parts positioned at the bottom are close to the worktable, parts located at the front are close to the operator during operation, and parts located at the rear are farther away from the operator during operation.

[0012] An extraction device according to the invention offers in particular the advantage that the light arrangement can be positioned directly and safely near the extraction opening, thereby improving the visibility conditions in the processing area compared to known solutions.

[0013] The frame features at least one circuit board and incorporates numerous lighting elements integrated into the circuit board. This allows light to be directed onto the work area from a variety of directions, thus better preventing shadows on the workpiece.

[0014] The frame features a separate lens for each light element. This allows for even better alignment of the light from each element, as different lens settings (alignment, focus) can be used. The lenses are preferably designed as elements that widen away from the light element.

[0015] Furthermore, the lenses are preferably formed integrally with the underside of the frame. This simplifies the assembly of the frame.

[0016] The light frame may have an opening which is preferably at least 7 cm, more preferably at least 10 cm, and even more preferably at least 15 cm wide. In particular, the opening may extend across the entire width of an extraction opening of the extraction device or of a main body of the extraction device, or even beyond. This may improve visibility.

[0017] Preferably, the light arrangement that solves the problem underlying the invention can be attached to an extraction device or furthermore has a stand element by means of which the light arrangement can be positioned on a work area.

[0018] The features described below, which define the extraction device according to the invention, can be transferred in the same way to the light arrangement that solves the problem underlying the invention.

[0019] Preferably, the extraction device also has a transparent protective cover positioned in front of the light element. This protects the light element from damage caused by grinding dust, thereby increasing its robustness.

[0020] Preferably, the upper part of the viewing aperture is also frameless or transparent. This allows the field of vision to be enlarged or improved.

[0021] Preferably, the light element extends over a lower area of ​​the frame. This improves visibility in the processing area, thereby increasing product quality.

[0022] Preferably, the extraction device further comprises a transparent protective screen which is attached to the extraction device in front of the viewing opening and, in particular, is detachably mounted on the device. The transparent protective screen is also free of light elements in its upper area. In this way, occupational safety can be increased without impairing visibility in the work area.

[0023] Preferably, the frame is attached to the main body by means of the transparent protective plate, in particular via a clamping or screw mechanism. Alternatively, the transparent protective plate can be attached to the main body by means of the frame. Another alternative is that the frame and the transparent plate can be attached to the main body independently, preferably with a common fastening device for both. With the three aforementioned preferred embodiments, it is possible to easily remove the frame with the transparent protective plate from the main body, thus enabling quick and safe cleaning.

[0024] Preferably, the frame is essentially U-shaped, horseshoe-shaped, or O-shaped. This improves visibility in the work area.

[0025] Preferably, the frame has two lateral legs, which are further preferably curved and particularly preferably curved inwards. In this way, the visible area of ​​the machining area can be increased, thereby improving visibility in the machining area.

[0026] Preferably, the parts of the light element arranged along the frame are inclined towards each other. If several light elements are provided, they are preferably arranged inclined towards each other. Inclined towards each other means that the parts of the light element or the light elements are essentially directed towards a common point or a common central area of ​​the processing area. In this way, the lighting conditions in the processing area can be improved, thereby simultaneously improving the visibility conditions in the processing area.

[0027] Preferably, all parts of the light element, or all light elements, have the same inclination. This increases the uniformity of illumination in the work area, thereby improving visibility in that area.

[0028] Preferably, the extraction opening is covered with a grille. This prevents small objects, such as tool parts, or larger grinding particles from unintentionally entering the extraction tunnel and becoming lost or clogging it. This improves the safety and reliability of the extraction system.

[0029] Preferably, the extraction device also features a magnifying element in the area of ​​the viewing opening, which is in particular frameless or has a transparent frame. This allows for further improvement of visibility in the work area.

[0030] A machining area according to the invention comprising a worktable can be coupled to a suction device as described above. Brief description of the characters Fig. Figure 1a shows an extraction device in an isometric view from the front. Fig. 1b shows the in Fig. 1a Extraction device shown in an isometric view from the rear. Fig. 1c shows the in the Fig. 1a and Fig. 1b shows the extraction device in a top view. Fig. 1d shows the in the Fig. Extraction device shown in 1a to 1c in a side view. Fig. 1e shows the in the Fig. 1a to 1d shows an extraction device coupled with a work area in a top view. Fig. 1f shows the in Fig. 1e Extraction device shown in a side view. Fig. 2 shows the ones in the Fig. Extraction device shown in 1a to 1d in a side sectional view. Fig. Figure 3a shows a light arrangement in an isometric view from the front. Fig. 3b shows the in Fig. 3a Light arrangement shown in an isometric view from behind. Fig. Figure 4a shows a main body in an isometric view. Fig. 4b shows the one in Fig. 4a Main body shown in a front view. Fig. 4c shows the one in the Fig. 4a and Fig. 4b main body shown in a rear view. Fig. 4D shows the in Fig. The main body shown in 4a to 4c is in a side section view. Fig. Figure 5a shows a switch housing in a front view. Fig. 5b shows this in Fig. 5a Switch housing shown in a side sectional view. Fig. Figure 6a shows a suction funnel in a rear view. Fig. 6b shows the one in Fig. 6a shows the extraction funnel in a side sectional view. Fig. 6c shows the one in the Fig. 6a and Fig. 6b shows the extraction funnel in a top view. Fig. 6d shows the one in the Fig. The extraction funnel shown in 6a to 6c is viewed from below. Fig. Figure 7a shows an extraction device with a transparent protective plate in an isometric view from the front. Fig. 7b shows the in Fig. 7a Extraction device shown in an isometric view from the rear. Fig. Figure 8 shows an isometric view of another embodiment of a suction device. Fig. Figure 9 shows a rear frame half for light elements. Fig. Figure 10a shows a second front frame half for optical elements. Fig. Figure 10b shows an enlarged section of the Fig. 10a shown second, front frame half. Fig. 11a shows a section AA from Fig. 10b. Fig. 11b shows a section BB from Fig. 10b. Description of preferred embodiments

[0031] Fig. Figure 1a shows an extraction device 100 in an isometric front view. The extraction device 100 is aligned along a longitudinal direction 501 extending from front to back, a lateral direction 503 extending from left to right, and a vertical direction 505 extending from bottom to top. The extraction device 100 has a main body 110 to which a light assembly 200 is attached at the top by means of a clamping mechanism 150. The light assembly 200 has a frame 210, which, in the illustrated embodiment, is U-shaped or horseshoe-shaped around a viewing opening 230. Below the clamping mechanism 150, the extraction device 100 has an electrical circuit 240. The electrical circuit 240 can, for example, be housed in a switch casing and attached to the main body 110 via this casing (see Figure 1a). Fig. 5a and Fig. 5b) or it can be attached directly to the light assembly 200 and form a unit with it. The extraction device 100 also has an extraction funnel 120, which is also connected to the main body 110 at the top. The extraction funnel 120 is located behind the clamping mechanism 150 and is additionally attached to the main body 110 by means of this mechanism. The frame 210 has an opening 214 at the top, which can be approximately the width of the extraction funnel 120.

[0032] Fig. 1b shows the in Fig. Figure 1a shows an extraction device 100 in an isometric rear view. The light arrangement 200 further comprises three light elements 220, which are arranged behind the frame 210 and completely cover its rear side. The light elements are designed here as strips or, for example, as neon tubes, illuminating the work area 400. However, a large number of light elements 210 can also be provided, which, for example, can be designed as LEDs arranged side by side. Thus, 20 to 40 light elements can also be provided behind a transparent pane. The light elements 210 are inclined towards the viewing opening 230, the inclination preferably being chosen such that a uniformly pronounced light area is formed at the bottom, particularly on a work area 400 (see Figure 1a). Fig. 1e and Fig. 1f). The further designs of the light element 210 and the directed illumination of the processing area 406 are described below with reference to the Fig. 8-11b is explained in more detail. The centrally or lower light element 220 is connected to the frame 210 in a lower area 216. The extraction device 100 also has an extraction tunnel 112 that runs from a discharge opening 130 through the main body 110 to the extraction funnel 120. The extraction device 100 also has a coupling device 140 that is connected to the main body 110 at its lower end. The extraction device 100 also has an electrical connection 160 that can be connected to the main body 110 at the front, upper end of the coupling device 140. The extraction device 100 also has a grille 124 that is arranged behind and covers the extraction funnel 120.

[0033] Fig. 1c shows the in the Fig. 1a and Fig. 1b shows the extraction device 100 in a top view. Fig. 1d shows the in the Fig. Extraction device 100 shown in 1a to 1c in a side view.

[0034] Fig. 1e shows the in the Fig. Extraction device 100 shown in 1a to 1d coupled with a working area 400 in a top view. Fig. 1f shows the in Fig. Figure 1e shows a side view of the extraction device 100. The working area 400 has a coupling receptacle 410 located at the bottom of the working area 400, by means of which the working area 400 is coupled or connected to the extraction device 100 via the coupling device 140. The working area 400 is also electrically connected to the extraction device 100 via the electrical connection 160.

[0035] Fig. 2 shows the ones in the Fig. The extraction device 100 shown in 1a to 1d is depicted in a side sectional view 610-610. The sectional view 610-610 corresponds to that shown in Fig. Section line 1c marked with reference numeral 610. The main body 110 also has a cable duct 170, which runs through the extraction tunnel 112 and via which the electrical connection 160 is electrically connected to the electrical circuit 240 and thus to the light elements 210.

[0036] Fig. Figure 3a shows a light arrangement 200 in an isometric view from the front. Fig. 3b shows the in Fig. 3a shows the light arrangement 200 in an isometric view from behind. The light arrangement shown in the Fig. 3a and Fig. The light arrangement shown in 3b corresponds to that shown in the Fig. 1a to 2 as part of the extraction device 100, the light arrangement 200 is shown. The light arrangement 200 further comprises a connecting device 212 by means of which the light arrangement 200 is attached to the main body 110.

[0037] Fig. Figure 4a shows a main body 110 in an isometric view. The in Fig. The light arrangement shown in 4a corresponds to that shown in the Fig. Figures 1a to 2 show the main body 110 as part of the extraction device 100. The main body 110 has an extraction funnel receptacle 114 in its upper region, by means of which the extraction funnel 120 can be connected to the main body 110. The main body 110 is curved forwards by approximately 180°, i.e., the opening direction of the extraction funnel receptacle 114 is essentially parallel to the opening direction of the discharge opening 130.

[0038] Fig. 4b shows the one in Fig. Figure 4a shows the main body 110 in a front view. The main body 110 has two clamping receptacles 118 in its upper region. The main body 110 also has a connection receptacle 116 into which the electrical circuit 240 can be received.

[0039] Fig. 4c shows the one in the Fig. 4a and Fig. 4b shows the main body 110 in a rear view. Fig. 4D shows the in Fig. The main body 110 shown in 4a to 4c is depicted in a side sectional view 620-620. The sectional view 620-620 corresponds to the one shown in Fig. 4b with the section line marked with reference numeral 620.

[0040] Fig. Figure 5a shows a switch housing 162 in a front view. The switch housing 162 has a switch receptacle 164 into which a switch, as shown in Figure 5a, is inserted. Fig. The electrical circuit 240 shown in Figure 1a is receptacleable and accessible to an operator. The switch housing 162 is also receptacleable in the terminal receptacle 116 or attachable to it with the main body 110.

[0041] Fig. 5b shows this in Fig. 5a shows the switch housing 162 in a side sectional view 630-630. The sectional view 630-630 corresponds to the one in Fig. 5a section line marked with reference numeral 630. The switch housing 162 further has a frame receptacle 166 into which the frame 210 can be at least partially received. The frame receptacle 166 has a groove 167 into which the frame 210, in particular its connecting device 212, can be at least partially received or recessed (cf. Fig. 3a and Fig. 3b).

[0042] Fig. Figure 6a shows a 120 mm extraction funnel in a rear view. The one in Fig. The extraction funnel 120 shown in 6a corresponds to the one in the Fig. The extraction funnel 120 shown in Figures 1a to 2 is part of the extraction device 100. The extraction funnel 120 has a tunnel opening 121 which, in the operating or assembled state, projects into the extraction tunnel 112. The extraction funnel 120 is in Fig. 6a is shown without the grid 124. The extraction funnel 120 also has a grid receptacle 122 into which the grid can be inserted (see Figure 6a). Fig. 1b).

[0043] Fig. 6b shows the one in Fig. The extraction funnel 120 shown in Figure 6a is depicted in a side sectional view 640-640. The sectional view 640-640 corresponds to the one shown in Figure 6a. Fig. Section line 6a marked with reference numeral 640. The suction funnel 120 has a funnel-shaped opening that tapers from the grid receptacle 122 to the tunnel opening 121.

[0044] Fig. 6c shows the one in the Fig. 6a and Fig. 6b shows the extraction funnel 120 in a top view. Fig. 6d shows the one in the Fig. The extraction funnel 120 shown in Figures 6a to 6c is depicted in a bottom view. The extraction funnel 120 also has two clamping openings 128 which can be coupled to the two clamping receptacles 118. The extraction funnel 120 can be attached to the main body 110 by means of the two clamping openings 128 and the two clamping receptacles 118 (see Figure 6a to 6c). Fig. 4b). A different number of clamping receptacles 118 and clamping openings 128 may also be provided for this purpose, e.g. one or three, four or more than four.

[0045] Fig. Figure 7a shows an extraction device 100 with a transparent protective plate 300 in an isometric view from the front. Fig. 7b shows the in Fig. Figure 7a shows the extraction device 100 in an isometric rear view. The transparent protective plate 300 is attached to the frame 210 by means of the clamping mechanism 150 in such a way that the viewing opening 230 is covered (see Figure 7a). Fig. 1a) Since the transparent protective plate 300 is transparent, it prevents dust from passing through the viewing opening 230, but an operator can still see through the viewing opening 230.

[0046] Fig. Figure 8 shows a second embodiment of an extraction device 100, in which a processing area 406 is depicted. Here, this area is not positioned just above the tabletop, but rather somewhat higher. In principle, the processing area 406 can be located at any point, provided that the light frame 210 can illuminate the processing area 406. Here, the processing area 406 is positioned higher, above a shield 402. The shield 402 can be attached to the main body or to another component, such as the extraction tunnel 112, for example, by means of a screw mechanism 404.

[0047] In Fig. Figure 9 shows the top surface 211 of a frame 210. In this particular embodiment, the frame has a circuit board 222 and a plurality of light elements 220, in particular LEDs, which are arranged on the circuit board 222 and thus supplied with power. A stabilizing element 215 can be formed on the outside of the light elements to stabilize the frame 210. The stabilizing element 215 can, for example, be designed as a metal rod bent according to the shape of the frame.

[0048] In Fig. Figure 10a shows the underside 213 of the frame 210. The underside 213 serves as a transparent cover for the top side 211, allowing the light elements 220 to shine through the cover. The top side can be designed entirely as an elongated lens, so that the light from the light elements is directed and focused. This is particularly advantageous when a light strip is used instead of individual light elements. However, it is preferred that a plurality of light elements 220 are provided and each light element 220 has its own lens 224.

[0049] Fig. Figure 10b shows such a lens 224 in magnification. The lens 224 can be cylindrical or prism-shaped and preferably widens from a small side at the light element to a larger side at which it is attached to the transparent cover. This can be done, for example, by gluing, but in particular, the cover is manufactured as a single piece with the lenses 224. In this case, the material of the lens 224 and the underside 213 is the same. Here, the lenses 224 are configured as a four-sided pyramid that widens in size.

[0050] The lenses 224 are specifically aligned to focus the light from the associated light element 220 and emit it onto the processing area 406. In particular, the focal points of the lenses are arranged next to each other in the processing area 406, so that the entire processing area 406 is illuminated, but virtually no light is lost outside the processing area 406.

[0051] In Fig. 11a is section AA from Fig. Figure 10b shows a frame 210 arranged between two lenses 224, with the top and bottom of the frame attached to each other, so that the section shows the complete frame 210. The connection can be achieved, for example, via a click element 226, which fastens the top and bottom of the frame 210 together. The circuit board 222, the stabilizing element 215, the top 211, and the bottom 213 are shown here.

[0052] In Fig. 11b is the BB section from Fig. Figure 10b shows the complete frame 210. The light element 210 is mounted on the circuit board 222, with the lens 224 formed on the light element. The light element 210 lies in the smaller side of the lens and emits the light into the lens 224. The lens then widens towards the transparent cover of the underside 210. Reference symbol list 100 extraction device 110 Main body 112 extraction tunnels 114 Extraction funnel holder 116 Connection 118 Clamping device 120 extraction funnels 121 Tunnel opening 122 Grid view 124 grids 128 clamping opening 130 Drainage opening 140 coupling device 150 clamping mechanisms 160 electrical connection 162 switch housings 164 Switch holder 166 frame shot 167 Nut 170 cable duct 200 light arrangement 210 frames 211 Top 212 Connecting device 213 Underside 214 Breakthrough 215 Stabilizing element 216 lower range 218 lateral thigh 220 light element 222 Circuit board 224 lens 226 click element 230 viewing aperture 236 upper area 240 electrical circuit 300 transparent protective plates 400 work area 402 sign 404 Screw mechanism 406 processing area 410 coupling device 501 Longitudinal direction 503 Latitude 505 Altitude 610-610 Sectional view 620-620 sectional view 630-630 Sectional view 640-640 Sectional view

Claims

[1] Extraction device (100) comprising dust particles comprising a main body (110) with an extraction tunnel (112) having an intake opening and a discharge opening (130), wherein the dust particles occurring in front of the intake opening during operation can be captured and discharged from the discharge opening (130) through the extraction tunnel (112); a light arrangement (200) for illuminating a processing area (406), wherein the light arrangement (200) has a frame (210) along which at least one light element (220) is arranged, which extends substantially over the entire frame (210), wherein the frame (210) centrally encloses a viewing opening (230), wherein the light element (220) is directed towards the processing area (406) during operation; characterized by , that The light arrangement (200) for the light element (220) comprises at least one lens (224) by means of which the light of the light element (220) is directed. [2] Extraction device (100) according to claim 1, wherein the frame has at least one printed circuit board (222) and a plurality of light elements (220) are provided which are formed on the printed circuit board (222). [3] Extraction device (100) according to claim 2, wherein the frame has a separate lens (224) for each light element (220). [4] Extraction device (100) according to claim 3, wherein the lenses are designed as elements that widen away from the light element. [5] Suction device (100) according to one of claims 3 or 4, wherein the lenses are formed integrally with the underside (213) of the frame (210).

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