extraction device

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 ceramic workstations, are known from the prior art and are used especially during grinding operations to extract airborne ceramic particles. When processing dental ceramics, it is also essential that the operator is protected, particularly from the inhalation of ceramic particles into their respiratory tract and eyes. Especially at high rotational speeds of the grinding or milling tools, highly accelerated ceramic particles are frequently released in an almost uncontrollable manner. These particles are often propelled towards the operator, who must therefore wear at least eye and mouth protection. However, this protective equipment 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.The extraction device should be positioned so that it acts as a kind of shield for the operator. 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 the aforementioned components, leading to uneven illumination of the work area and a deterioration of visibility.

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

[0004] For example, theDE 90 14 485 U1 An extraction hood for extracting grinding dust generated during the processing of workpieces in the fields of dental technology, jeweling, engraving and related professions, consisting of a hood section closed at the lid end and in the direction towards the user's body and equipped with a viewing window and a light source at the lid end, which is open on both sides and in the direction away from the user's body, and with a grate arranged at the bottom, which opens into an extraction chamber below, wherein the extraction hood is connected to a toggle lever system under spring tension, which maintains any desired position and wherein a drawer, which can be covered by a dust filter opposite the extraction nozzle, is arranged below the grate at the bottom of the extraction hood as a storage space for precious metal grinding dust.

[0005] The WO 2021 / 243455 A1 reveals a lighting system with a negative pressure inlet, comprising a lighting structure with at least one light-emitting element, which so The lighting structure is dimensioned to illuminate a specific area and includes a lighting support structure extending from one end of the structure, allowing for repositioning of the lighting structure relative to the other end. The lighting structure incorporates an air duct extending along its length, which can be connected to a vacuum system at the other end. Description of the invention

[0006] 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 conditions as well as leading to high product quality.

[0007] The problem is solved by a suction device according to claim 1 and a processing area according to claim 13. Further features that further develop the invention are contained in the dependent claims.

[0008] 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, a coupling device for attaching the main body to a processing area, a light arrangement for illuminating the processing area, wherein the light arrangement has a frame along which at least one light element is arranged, extending 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, and wherein the light arrangement is attached to the top of the main body by means of a clamping mechanism, and an electrical circuit for activating and deactivating the light arrangement.wherein the frame has an opening at the top, so that the frame (210) is essentially U-shaped or horseshoe-shaped. The opening extends in particular over the entire width of the suction opening or the main body.

[0009] 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, for example, be a light strip. Alternatively, several light elements can be provided, lying side by side and following the frame geometry, for example, several LEDs arranged side by side to form a strip.

[0010] The frame surrounding the viewing opening in the center is arranged around the viewing opening.

[0011] 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.

[0012] According to the invention, the light arrangement in the area of ​​the opening is designed without light elements.

[0013] According to the invention, the processing area is understood to be, for example, a worktable or workplace in a dental laboratory, or the place where, for example, the dental ceramic is processed / milled.

[0014] Parts or components of the extraction system that are located away from the processing area during operation are described as being positioned at the top. Accordingly, parts positioned at the bottom are close to the processing area, those at the front are close to the operator during operation, and those at the rear are farther away from the operator during operation.

[0015] 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.

[0016] The opening is preferably at least 7 cm wide, more preferably at least 10 cm wide, and even more preferably at least 15 cm wide. This improves visibility.

[0017] The problem is further solved by a lighting arrangement for an extraction device, for illuminating a work area, wherein the lighting arrangement has a frame along which at least one light element is arranged, extending substantially over the entire frame, the frame enclosing a viewing opening in the center, the light element being directed towards the work area during operation, and an electrical circuit for activating and deactivating the lighting arrangement, wherein the frame has an opening at the top, which extends in particular over the entire width of an extraction opening of the extraction device or of a main body of the extraction device. It is also possible to attach such a lighting arrangement directly to a dental tool, e.g., a drill, thereby minimizing shadowing by the tool itself.

[0018] 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 processing area.

[0019] 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.

[0020] 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 ceramic dust, thereby increasing the robustness of the extraction device.

[0021] Preferably, the upper part of the viewing aperture is also frameless or transparent. This allows the field of vision to be enlarged or improved.

[0022] Preferably, the light element extends over a lower area of ​​the frame. This improves visibility in the processing area, thereby increasing product quality.

[0023] Preferably, the extraction device further comprises a transparent protective plate which is attached to the extraction device in front of the viewing opening and, in particular, is detachably attached to the extraction device. The transparent protective plate 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.

[0024] Preferably, the frame is attached to the transparent protective plate. This allows for a minimal installation space, ensuring that visibility in the processing area is not impaired despite additional protective elements.

[0025] Preferably, the frame is attached to the main body by means of the transparent protective plate, in particular via a clamping 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.

[0026] Since the frame is essentially U-shaped or horseshoe-shaped, visibility in the processing area can be improved.

[0027] 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.

[0028] 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.

[0029] In this way, the lighting conditions in the processing area can be improved, which in turn can improve the visibility conditions in the processing area.

[0030] 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.

[0031] Preferably, the discharge opening is designed as a coupling device. This provides a space-saving and cost-effective solution.

[0032] Preferably, the extraction device further comprises an electrical connection for connecting the extraction device to the work area. An electrical connection is understood to be a connection through which the extraction device can be connected to an electrical power source, so that the lighting arrangement can be supplied with electrical current. This eliminates the need for a power supply or energy storage device in the immediate vicinity of the lighting arrangement, thereby reducing the required installation space and improving visibility.

[0033] Preferably, the electrical connection is located at the coupling device and is wireless. This eliminates the need for external power cables to supply the lighting system, which are particularly prone to malfunctions and short circuits in dusty working environments. This improves the safety and robustness of the extraction system.

[0034] Preferably, an electrical conductor runs from the electrical connection to the light element through the extraction tunnel. This also eliminates the need for external power cables to supply the lighting assembly with electricity.

[0035] Preferably, the electrical cable runs from the electrical connection to the lighting elements in a cable duct. This protects the electrical cable from rapidly moving ceramic particles in the extraction tunnel, thereby increasing the robustness of the extraction system.

[0036] Preferably, the extraction opening is shaped as an extraction funnel. This increases the extraction effect, thereby increasing the efficiency of the extraction device.

[0037] Preferably, the main body is curved forwards by approximately 180°. In this way, the main body itself can be used as an additional shielding component, thereby increasing the protective effect of the extraction device.

[0038] Preferably, the suction opening is covered with a grid. This prevents larger objects, such as tool parts or dental ceramic components, from unintentionally entering and clogging the suction tunnel. This improves the robustness of the suction device.

[0039] Preferably, the extraction device also includes 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 processing area.

[0040] 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

[0041] Fig. 1a shows an extraction device in an isometric view from the front. Fig. 1b shows the in Fig. 1aExtraction device shown in an isometric view from the rear. Fig. 1c shows the in the Fig. 1a and 1b Extraction device shown in a top view. Fig. 1d shows the in the Figs. 1a to 1c Extraction device shown in a side view. Fig. 1e shows the in the Figs. 1a to 1d The illustrated extraction device is 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 in the Figs. 1a to 1d Extraction device shown in a side sectional view. Fig. 3a shows a lighting 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. 4a shows a main body in an isometric view. Fig. 4b shows the in Fig. 4a Main body shown in a front view. Fig. 4c shows the one in the Figs. 4a and 4b Main body shown in a rear view. Fig. 4d shows the in Figs. 4a to 4c The main body is shown in a side sectional view. Fig. 5a shows a switch housing in a front view. Fig. 5b This shows in Fig. 5a Switch housings shown in a side sectional view. Fig. 6a shows a suction funnel in a rear view. Fig. 6b shows the in Fig. 6a The extraction funnel shown is in a side sectional view. Fig. 6c shows the one in the Figs. 6a and 6b The extraction funnel shown is in a top view. Fig. 6d shows the one in the Figs. 6a to 6c The extraction funnel shown is in a view from below. Fig. 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. Beschreibung der bevorzugten Ausführungsformen

[0042] Fig. 1a Figure 1 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 that 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 1). Fig. 5a und 5b The extraction device 100 further comprises an extraction funnel 120, which is also connected to the main body 110 at the top. The extraction funnel 120 is arranged behind the clamping mechanism 150 and additionally fastened to the main body 110 by means of this mechanism. The frame 210 has an opening 214 at the top, which is approximately the width of the extraction funnel 120.

[0043] Fig. 1b shows the in Fig. 1a The illustrated extraction device 100 is shown 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 three light elements 210 are inclined towards the viewing opening 230, the inclination preferably being selected such that a uniformly pronounced light area is formed at the bottom, in particular on a processing area 400 (see figure). Fig. 1e und 1f 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 extends 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 is 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 the extraction funnel 120 and covers it.

[0044] Fig. 1c shows the in the Fig. 1a und 1b Extraction device 100 shown in a top view. Fig. 1d shows the in the Fig. 1a bis 1c Extraction device 100 shown in a side view.

[0045] Fig. 1e shows the in the Fig. 1a bis 1d The illustrated extraction device 100 is coupled with a working area 400 in a top view. Fig. 1f shows the in Fig. 1e The extraction device 100 is shown in a side view. The working area 400 has a coupling receptacle 410, which is arranged at the bottom of the working area 400 and 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.

[0046] Fig. 2 shows the in the Fig. 1a bis 1d The extraction device 100 shown is depicted in a side sectional view 610-610. The sectional view 610-610 corresponds to the one in Fig. 1c The section line is 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.

[0047] Fig. 3a shows a light arrangement 200 in an isometric view from the front. Fig. 3b shows the in Fig. 3a The light arrangement shown is 200 in an isometric view from behind. The light arrangement shown in the Fig. 3a und 3b The light arrangement shown, 200, corresponds to that shown in the Fig. 1a bis 2 The light arrangement 200 shown as part of the extraction device 100. 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.

[0048] Fig. 4a shows a main body 110 in an isometric view. The in Fig. 4a The light arrangement shown, 200, corresponds to that shown in the Fig. 1a bis 2 The main body 110 is shown 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.

[0049] Fig. 4b shows the in Fig. 4a The main body 110 is shown 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.

[0050] Fig. 4c shows the one in the Fig. 4a und 4b Main body 110 shown in a rear view. Fig. 4d shows the in Fig. 4a bis 4c The main body 110 shown is depicted in a side sectional view 620-620. The sectional view 620-620 corresponds to the one in Fig. 4b section line marked with reference numeral 620.

[0051] Fig. 5a Figure 1 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 164, can be inserted. Fig. 1a The electrical circuit 240 shown 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.

[0052] Fig. 5b This shows in Fig. 5a The switch housing 162 shown is in a side sectional view 630-630. The sectional view 630-630 corresponds to the one in Fig. 5a The section line marked with reference numeral 630. The switch housing 162 also 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 (see figure). Fig. 3a und 3b ).

[0053] Fig. 6a shows a 120 mm extraction funnel in a rear view. The one in Fig. 6a The illustrated extraction funnel 120 corresponds to the one shown in the Fig. 1a bis 2 The extraction funnel 120 is shown as 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 shown without the grid 124. The extraction funnel 120 also has a grid receptacle 122 into which the grid can be inserted (see figure). Fig. 1b ).

[0054] Fig. 6b shows the in Fig. 6a The extraction funnel 120 shown in a side sectional view 640-640. The sectional view 640-640 corresponds to the one in Fig. 6a The section line is 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.

[0055] Fig. 6c shows the one in the Fig. 6a und 6b The illustrated extraction funnel 120 is shown in a top view. Fig. 6d shows the one in the Fig. 6a bis 6c The extraction funnel 120 is shown in a view from below. 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). 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.

[0056] Fig. 7a Figure 1 shows a suction device 100 with a transparent protective plate 300 in an isometric view from the front. Fig. 7b shows the in Fig. 7a The extraction device 100 is shown 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). 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. Bezugszeichenliste

[0057] 100 Extraction device 110 Main body 112 Extraction tunnel 114 Extraction funnel mount 116 Connection mount 118 Clamp mount 120 Extraction funnel 121 Tunnel opening 122 Grille mount 124 Grille 128 Clamp opening 130 Drain opening 140 Coupling device 150 Clamping mechanism 160 Electrical connection 162 Switch housing 164 Switch mount 166 Frame mount 167 Groove 170 Cable duct 200 Light arrangement 210 Frame 212 Connecting device 214 Opening 216 Lower area 218 Side leg 220 Light element 230 Viewing opening 236 Upper area 240 Electrical circuit 300 Transparent protective plate 400 Machining area 410 Coupling mount 501 Longitudinal direction 503 Latitude 505 Height 610-610 Sectional view 620-620 Sectional view 630-630 Sectional view 640-640 Sectional view

Claims

1. Suction device (100) for sucking dust particles, comprising a main body (110) with a suction tunnel (112) having a suction opening and a discharge opening (130), wherein the dust particles present in front of the suction opening during operation can be collected and discharged through the suction tunnel (112) from the discharge opening (130); a coupling device (140) for fixing the main body (110) to a work area (400); a light assembly (200) for illuminating the work area (400), wherein the light assembly (200) comprises 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) enclosing a viewing aperture (230) centrally, the light element (220) being directed towards the working area (400) during operation, the light assembly being attached to the top of the main body (110) by means of a clamping mechanism (150); and an electrical circuit (240) for activating and deactivating the light assembly (200); characterised in that the frame (210) has an opening (214) at the top, so that the frame (210) is essentially U-shaped or horseshoe shaped.

2. Suction device (100) according to claim 1, wherein the light element (220) extends over a lower region (216) of the frame (210).

3. Suction device (100) according to one of the preceding claims, further comprising a transparent protective plate (300) which is attached in front of the viewing opening (230) and, in particular, detachably to the suction device (100).

4. Suction device (100) according to claim 3, wherein the frame (210) is attached to the transparent protective plate (300).

5. Suction device (100) according to one of claims 3 or 4, wherein the frame (210) is attached to the main body (110) by means of the transparent protective plate (300), in particular via the clamping mechanism (150).

6. Suction device (100) according to one of the preceding claims, wherein the parts of the light element (220) arranged along the frame (210) are inclined towards each other.

7. Suction device (100) according to one of the preceding claims, wherein the discharge opening (130) is designed as a coupling device (140).

8. Suction device (100) according to one of the preceding claims, further comprising an electrical connection (160) for electrically connecting the suction device (100) to the processing area (400).

9. Suction device (100) according to claim 8, wherein an electrical line runs from the electrical connection (160) to the light element (220) through the suction tunnel (112).

10. Suction device (100) according to one of the preceding claims, wherein the suction opening is formed as a suction funnel (120).

11. Suction device (100) according to one of the preceding claims, wherein the main body (110) is curved forward by substantially 180°.

12. Suction device (100) according to one of the preceding claims, wherein the suction opening is covered with a grille (124).

13. A processing area (400) comprising a suction device (100) according to one of the preceding claims and a worktable that can be coupled to the suction device (100).