Manually guided working instrument

Abstract

The invention relates to a manually guided working instrument, comprising a drive motor (2), a production material tank and a motor carrier (3), wherein the drive motor (2) is held on the motor carrier. The production material tank comprises a first housing section (21) and a second housing section (22). The first housing section (21) is constructed integrally with the motor carrier (3). At least a part of the second housing section (22) is formed of a light-transmissive material in order to identify the filling condition of the production material tank. The motor carrier (3) comprises a light-transmissive optical guide element (11, 111) for guiding light into the production material tank.

Description

Technical Field

[0001] The invention relates to manually guided working instruments. Background Art

[0002] For manually guided working devices having a production material tank which is formed integrally with a motor carrier and which can contain, for example, lubricating oil for lubricating components of the working device or fuel for driving an internal combustion engine, it is desirable to be able to detect the filling status of the production material tank in a simple manner.

[0003] A production material tank having a manually guided working device integrated into a cover part of the production material tank or a second housing section is known from DE 10 2006 048 550 A1.

[0004] It is also known to form the second housing section of the production means tank completely from a light-transmissive material in order to detect the filling level of the production means tank.

[0005] Despite the light-transmissive material of the second housing section with the insertion opening, the filling status of the production material tank is still only barely discernible. Summary of the invention

[0006] The invention is based on the object of developing the working device in such a way that the filling level of the production material tank can be well detected.

[0007] The object is achieved by a manually guided working device comprising a drive motor, a production material tank and a motor carrier, wherein the drive motor is held on the motor carrier, wherein the production material tank has a first housing section and a second housing section, wherein the first housing section is constructed integrally with the motor carrier, wherein at least a portion of the second housing section is formed from a light-transmissive material for identifying the filling condition of the production material tank, and wherein the motor carrier has a light-transmissive optical waveguide element for guiding light into the production material tank.

[0008] The present invention is configured such that the motor carrier has a light-permeable optical waveguide element for guiding light into the means of production tank. More light reaches the means of production tank through the light-permeable optical waveguide element. The light-permeable optical waveguide element is capable of receiving light and guiding the light into the means of production tank. The light-permeable optical waveguide element does not have to be a light conductor in the physical sense, in which light is transported over a short or long distance by reflection at the interface of the light conductor. More precisely, in the case of the light-permeable optical waveguide element according to the present invention, it is sufficient that it is formed of a light-permeable material at which visible light is scattered. Light falling on the light-permeable optical waveguide element can be transmitted to the means of production tank through the light-permeable optical waveguide element. The falling light is irradiated into the means of production tank through the light-permeable optical waveguide element. Additionally, the light falling on the light-permeable optical waveguide element can be guided into the means of production tank through the light-permeable optical waveguide element also from a position of the motor carrier that is away from the means of production tank by scattering in the light-permeable optical waveguide element. The light-permeable optical waveguide element collects light and guides it into the means of production tank. Therefore, the light-permeable optical waveguide element can also be referred to as a light collecting element.

[0009] By guiding light into the production material tank by means of the light-conducting element, it is possible to easily detect the filling level of the production material tank through the second housing section of the production material tank which is at least partially formed from a light-transmissive material.

[0010] Advantageously, the light-conducting element is arranged such that it guides light into the first housing section of the production material tank, thereby producing a background illumination that enables good recognizability of the filling situation through the second housing section.

[0011] The first housing section of the production material tank can be at least partially covered by a light-impermeable element of the working device. In this case, it can be particularly advantageous to guide light into the production material tank, in particular into the first housing section, via a light-conducting element. The light can be transmitted via the light-conducting element to the area of ​​the first housing section of the production material tank that is covered by the light-impermeable element.

[0012] Advantageously, the entire second housing section of the production means tank is formed by a light-transmissive material. This makes it simple to identify the filling situation of the production means tank through the second housing section.

[0013] Advantageously, the light-guiding element is translucent. As a result, the light-guiding element is only partially light-permeable. The light-guiding element can then effectively scatter light and at the same time transmit part of the light. In this way, the light-guiding element can advantageously perform its two functions, collecting light and transmitting light. A translucent light-guiding element is light-permeable, but not sight-permeable or image-permeable. Advantageously, the light-guiding element transmits less than 50% of visible light when measured in accordance with standard ISO 2471. In particular, the light-guiding element transmits more than 20% of visible light when measured in accordance with standard ISO 2471.

[0014] In an advantageous development of the invention, the light guide element is formed from plastic. As a result, the light guide element can be produced simply and cost-effectively. Complex shapes of the light guide element can also be realized in a simple manner by using plastic.

[0015] The light guide element is preferably made of a fiber-reinforced plastic. Advantageously, the plastic contains between 30% by weight and 40% by weight of fibers, in particular between 33% and 37%. Preferably, the fibers are glass fibers. As a result, the light guide element can have a high light transmittance, that is, a high transmission ratio for visible light, while at the same time having sufficient strength.

[0016] Preferably, less than 0.1 weight percent of pigment is mixed into the plastic, thereby achieving a high light transmittance.

[0017] In an advantageous development of the invention, the light-conducting element is part of the outer wall of the motor carrier. As a result, the light-conducting element can be designed to be integrated with the motor carrier in a simple manner. This reduces the number of components of the working device and enables simple assembly of the working device. By integrating the light-conducting element into the outer wall of the motor carrier, the light-conducting element can be designed in such a way that it does not protrude from the motor carrier.

[0018] Suitably, the light-guiding element extends over at least a portion of the wall thickness of the outer wall of the motor carrier. Advantageously, the light-guiding element extends over the entire wall thickness of the outer wall of the motor carrier. Thus, the entire wall thickness of the motor carrier in the region of the light-guiding element can be used to collect and transmit light into the production material tank.

[0019] In an advantageous development of the invention, the light-conducting element extends over at least 5%, in particular at least 20%, of the outer surface of the motor carrier. As a result, light can be guided into the production material tank via the surface of the motor carrier.

[0020] Advantageously, the light-guiding element includes the entire first housing section of the production material tank. As a result, light can be guided particularly well into the first housing section of the production material tank. In this way, a particularly effective background illumination of the second housing section can be provided, since the light-guiding element includes the entire first housing section. The filling condition can be detected particularly well through the second housing section.

[0021] In an advantageous development of the invention, the light-guiding element includes the entire motor carrier. As a result, a large amount of light can be guided into the production material tank in a simple manner.

[0022] Suitably, the means of production tank is an oil tank. It can also be arranged that the means of production tank is a fuel tank.

[0023] The working device can be a motor chain saw and include both an oil tank and a fuel tank. Advantageously, the light-conducting element of the oil tank and the light-conducting element of the fuel tank are formed by a common structural component.

[0024] Advantageously, the motor carrier carries the tool.

[0025] The motor carrier is expediently designed to be translucent both in a region remote from the production means tank and in a region adjacent to the production means tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Further features of the invention are derived from further technical solutions, descriptions and drawings showing embodiments of the invention, which will be described in detail later. Among them:

[0027] Figure 1 A schematic perspective view of a manually guided working device according to the invention is shown,

[0028] Figure 2 A schematic perspective view of a manually guided working device according to the prior art is shown,

[0029] Figures 3 to 5 A schematic perspective view of an alternative embodiment of a manually guided working instrument according to the invention is shown,

[0030] Figure 6 Shown from Figure 4 The working instrument is perpendicular to the rotation axis of the drive motor along the Figure 4 A schematic side view of the handle on the dorsal side in the direction of arrow VI,

[0031] Figure 7 Shown from Figure 4 The working instrument is perpendicular to the rotation axis of the drive motor along the Figure 4 Schematic side view in the direction of arrow VII to the front side of the working instrument,

[0032] Figure 8 Shown from Figure 4 The working instrument is perpendicular to the rotation axis of the drive motor along the Figure 4 Schematic side view in the direction of arrow VIII to the upper side of the working instrument,

[0033] Fig. 9 Shown from Figure 4 The working instrument is parallel to the rotation axis of the drive motor along the Figure 4 A schematic side view showing the direction of the arrow IX in the figure on the cover molding of the working instrument,

[0034] Fig.10 and 11 Shown from Figure 4 A schematic perspective view of a motor carrier of a manually guided working device and a shaped cover part mounted thereon,

[0035] Figures 12 to 16 Shown from Fig.10 and 11 A schematic side view of a motor carrier and a cover molding,

[0036] Figures 17 to 19 Shown from Fig.10 and 11 Schematic perspective view of a motor carrier and a shaped covering part located remote from the motor carrier. DETAILED DESCRIPTION

[0037] Figure 1 In the schematic perspective illustration, a manually guided working device 1 is shown with a production material tank 4. The manually guided working device 1 comprises Fig. 9 The drive motor 2 shown in FIG. The drive motor 2 is held at the motor carrier 3. In the embodiment, the drive motor 2 is an internal combustion engine. However, it can also be arranged that the drive motor is an electric motor. Figure 1 As shown in the figure, the production means tank 4 has a first housing section 21 and a second housing section 22. The first housing section 21 is constructed in one piece with the motor carrier 3. The one-piece construction of the first housing section 21 and the motor carrier 3 is achieved in particular by manufacturing the motor carrier 3 including the first housing section 21 by a casting process (advantageously by an injection molding process). The second housing section 22 is constructed in one piece with a cover molded part (Abdeckformteil) 31. The motor carrier 3 is made of plastic. The cover molded part 3 is made of plastic. In the embodiment, the working instrument 1 is a motor chain saw. The manually guided working instrument can also be any other manually guided working instrument with a production means tank, in which the first housing section is constructed in one piece with the motor carrier.

[0038] The production material 5 is present in the production material tank 4. The production material can be, for example, oil or fuel for an internal combustion engine. Figure 1The production means tank 4 contains oil as production means 5. In order to identify the filling condition of the production means tank 3, in an embodiment, the entire second shell section 22 is formed of a light-transmissive material. In an embodiment, the entire second shell section 22 of the production means tank 4 is formed of a translucent material. The translucent material is only partially light-transmissive. It partially transmits light, but is not transparent. In an embodiment, more than 20% of visible light is transmitted by the translucent material. Less than 50% of visible light is transmitted by the translucent material. The transmission value is measured according to standard ISO2471. Between 50% and 80% of visible light is absorbed in the translucent material. Light passes from the outside 50 of the working instrument 1 through the translucent material of the second shell section 22 into the inner space 20 of the production means tank 4. This Figure 1 5 is indicated by arrow 52. On the outside of the second housing section 22, the filling condition of the production means tank 4 can be detected based on the comparison between the area of ​​the production means tank 4 with production means 5 and the area of ​​the production means tank 4 without production means 5. In this way, it is easy to determine how much production means 5 is still present in the production means tank 4.

[0039] The first housing section 21 of the production material tank 4 is at least partially covered by a light-impermeable element 23 of the working device 1. In the embodiment, the light-impermeable element 23 is a sprocket cover. The light-impermeable element of the working device can also be a colored layer, for example. In working devices according to the prior art, due to such light-impermeable elements, insufficient light reaches the production material tank in order to easily identify the filling status of the production material tank in the second housing section of the production material tank.

[0040] In order to bring more light into the interior 20 of the production material tank 4 , in particular into the interior of the first housing section 21 of the production material tank 4 , the motor carrier 3 has a light-transmissive first optical waveguide element 11 for guiding light into the production material tank 4 .

[0041] The first light guide element 11 is distinguished in that it collects light only away from the first housing section 21 of the production material tank 4. The light is received into the first light guide element 11 in the following area of ​​the outer wall 6 of the motor carrier 3, which does not limit the capacity of the production material tank 4. Figures 3 to 19 In contrast, the second light-conducting element 111 shown in FIG. 4 does not collect light directly at the first housing section 21 of the production material tank 4 .

[0042] The first optical waveguide element 11 is arranged transversely to the working instrument 1. Figure 1 The longitudinal direction 100 of the rotation axis 34 of the hidden drive motor 2 extends in the direction from the handle 9 to the production material tank 4. Figure 1The first optical waveguide element 11 extends in a bent manner in a plane perpendicular to the rotation axis 34. The first optical waveguide element 11 has an end 16 facing the handle 9 of the working instrument 1. Starting from the end 16 of the first optical waveguide element 11, the first optical waveguide element 11 first extends in the longitudinal direction 100 in the direction away from the handle 9 and then bends downward in the vertical direction 90. The first optical waveguide element 11 extends to the interior space 20 of the production material tank 4. The first optical waveguide element 11 guides light to the interior space 20 of the production material tank 4. In accordance with Figure 1 In the embodiment of the present invention, the first light guide element 11 is connected to the hidden back wall of the first shell section 21 of the production means tank 4 at a light inlet portion of the first shell section 21, which is also not shown. At least a portion of the light received by the first light guide element 11 is guided into the production means tank 4 at the light inlet portion. The light inlet portion is in the upper region of the production means tank 4 in the parking position of the manually guided working instrument 1. In the case of an incompletely filled production means tank 4, the light inlet portion is arranged above the production means 5 in the parking position of the manually guided working instrument 1. As a result, light is guided from the first light guide element 11 through the light inlet portion to a region of the production means tank 4 in which the production means 5 are not present.

[0043] The motor carrier 3 has an outer wall 6. The first light guide element 11 is part of the outer wall 6. The first light guide element 11 extends at least through a part of the wall thickness of the outer wall. The entire first light guide element 11 is translucent. When visible light falls on the light guide element, more than 30% of the falling light is transmitted. When visible light falls, less than 50% of the falling light is transmitted by the first light guide element 11. As a result, a large amount of the falling light is scattered in the first light guide element 11 and is transmitted inside the first light guide element 11 via a subsequent scattering process. Figure 1 In FIG. 5 , the visible light falling on the first light-guiding element 11 is indicated by arrows 51 .

[0044] As in Figure 1 As shown in FIG. 5 , the light falls on the first light guide element 11 at a location far from the production material tank 4 along the arrow 51 and is transmitted from there to the production material tank 4 by scattering. Figure 1In the embodiment of the present invention, the light collected by the first light guide element 11 in this way enters the interior space 20 of the production means tank 4 at the light inlet position at the back wall of the first shell section 21 of the production means tank 4. As a result, a background illumination is generated. This background illumination illuminates the interior space of the second shell section 22 of the production means tank 4 starting from the back wall of the first shell section 21 facing away from the second shell section 22. As a result, the contrast between the area of ​​the second shell section 22 in which the production means 5 are present and the area of ​​the production means tank 4 in which the production means 5 are not present is improved. As a result, the filling condition of the production means tank 4 can be clearly identified from the outside 50 of the working device 1 at the second shell section 22 of the production means tank 4.

[0045] For comparison Figure 1 The manually guided working instrument 1 according to the present invention and the prior art shown in Figure 2 A manually guided working instrument 201 according to the prior art is shown in the figure. Structural components of the manually guided working instrument 201 according to the prior art that are equivalent to the manually guided working instrument 1 according to the present invention are denoted by the same figure marks. Unlike the manually guided working instrument 1 according to the present invention, the manually guided working instrument according to the prior art does not have a translucent first light-guiding element 11 that is part of the outer wall 6 of the motor carrier 3. Instead, the manually guided working instrument 201 according to the prior art includes a motor carrier 203. The outer wall of the motor carrier 203 is not transparent and does not have a translucent light-guiding element at any position. The production material tank 204 of the manually guided working instrument 201 includes a first shell section 221 and a second shell section 22. The first shell section 221 is part of the motor carrier 203. The first shell section 221 does not have a light entrance portion into the production material tank 204. As shown by Figure 2 As shown by the arrow 52 in FIG. 2 , light can only pass through the translucent second housing section 22 and reach the production material tank 204 .

[0046] Figures 3 to 19 Involving basis Figure 1 The working device 101 is an alternative embodiment of the working device 101. The reference numerals of the corresponding components of the working devices 1 and 101 are selected identically. Only the reference numerals related to the light guide element are different from each other. The statements related to the remaining components of the working devices 1 and 101 that are not related to the light guide element can be transferred to the corresponding other working devices. Figures 5 to 10 As shown in the figure, the working device 101 also includes a first production material tank 4. For lubricating the saw chain (not shown) Figure 4 ) is present in the first production material tank 4 as the first production material 5. It can be configured that the working instrument 1 and the working instrument 101 also include Figure 6The second production material tank 14 shown in FIG. is used to operate in Fig. 9 The fuel of the drive motor 2 shown in the figure, which is constructed as an internal combustion engine, is used as the second production means 15 ( Figure 6 ) exists in the second production material tank 14.

[0047] As from Figure 4 and 5 As can be seen in , the working device 101 includes a second light-conducting element 111 .

[0048] according to Figures 3 to 19 The second optical guide element 111 of the manually guided working instrument 101 is distinguished from Figure 1 The first optical waveguide element 11 also extends through the first housing section 21 of the production material tank 4. Figures 3 to 19 The second light guide element 111 of the working device 101 collects light not only in the area of ​​the outer wall 6 of the motor carrier 3 that is far away from the production material tank 4 and / or the first housing section 21 of the production material tank 4, but also in the area of ​​the outer wall 6 of the motor carrier 3 that limits the production material tank 4. The second light guide element 111 is made of the same material as the first light guide element 11 of the working device 1. Figure 1 All statements regarding the first light-guiding element 11 of the manually guided working device 1 also apply according to Figures 3 to 19 The second optical guide element 111 of the manually guided working instrument 101.

[0049] The optical guide elements 11, 111 are part of the motor carrier 3. The motor carrier 3 is a load-bearing structural component of the manually guided working instrument 101. The motor carrier 3 carries the drive motor 2. The drive motor 2 is fixed to the motor carrier 2. A guide rail (not shown) is also directly fixed to the motor carrier 3. The motor carrier 3 carries a tool. The tool is a saw chain. The saw chain is guided in the guide rail. The motor carrier 3 absorbs the forces acting on the saw chain and the guide rail.

[0050] The second housing section 22 of the first production material tank 4 is formed completely from a light-transmissive material. The light-transmissive material is the translucent material already described for the first embodiment and has a transmission value for visible light described there, measured according to standard ISO 2471, of between 20% and 50%. This enables the filling condition of the first production material tank 4 to be detected. Figure 3 As shown by arrow 53 in FIG. 1 , light can pass through the first housing section 21 of the production material tank 4 and fall onto the production material tank 4. Fig.17 and 18 The interior 20 is shown in FIG.

[0051] The second light guide element 111 of the manually guided working instrument 101 can be subdivided into a first sub-light guide element 121 and a second sub-light guide element 122. The first sub-light guide element 121 is arranged away from the production material tank 4, 14 and extends to the production material tank 4, 14. The first sub-light guide element 121 is part of the motor carrier 3. The motor carrier 3 is translucent in the area of ​​the first sub-light guide element 121. Figure 1 The first light guide element 11 shown in FIG. 4 also has a first sub-light guide element 121 which is arranged away from the production material tank 4 .

[0052] The second sub-light guide element 122 is part of the first shell section 21 of the production material tank 4. The first shell section 21 of the production material tank 4 has Fig.17 The outer wall 26 shown in FIG. The outer wall 26 separates the interior space 20 of the first production material tank 4 from the outside 50 of the manually guided working instrument 101. The second sub-light guide element 122 is part of the outer wall 26 of the first shell section 21 of the production material tank 4. In the area of ​​the second sub-light guide element 122, the outer wall 26 of the first shell section 21 of the production material tank 4 is translucent. Figures 3 to 19 In the embodiment of the present invention, the entire outer wall 26 of the first shell section 21 of the production material tank 4 is translucent. Figures 3 to 19 In the embodiment of FIG. 4 , the motor carrier 3 is also designed to be translucent in the region adjacent to the production means tank 4 . Figure 1 The first light-conducting element 11 shown in FIG. 4 does not have a second partial light-conducting element which is designed as part of the first housing section 21 of the production material tank 4 .

[0053] Figures 10 to 19 The motor carrier 3 and the shaped cover part 31 are shown in different views. The motor carrier 3 and the shaped cover part 31 together form the middle part of the working device 101. The middle part of the working device 101 is arranged on a guide rail (not shown) of the working device 101 and on the Figure 4 In the mounted state of the working device 101, the cover molded part 31 is arranged on the motor carrier 3. The cover molded part 31 and the motor carrier 3 are adjacent to each other in the direction of the rotation axis 34. The cover molded part 31 and the motor carrier 3 are fixedly connected to each other. Figure 4 In the working device 101, the drive motor 2 constructed as an internal combustion engine is installed in Fig.10 The first housing section 21 of the first production means tank 4 and the first housing section 41 of the second production means tank 14 are integrally constructed with the motor carrier 3. The drive motor 2 is arranged in the longitudinal direction 100 between the first housing section 21 of the first production means tank 4 or the motor carrier 3 and the first housing section 41 of the second production means tank 14 or the motor carrier 3.

[0054] In accordance with Fig.10 Arrows XII, XIII, XIV, XV and XVI are drawn in the schematic perspective view of the middle part of the Figures 12 to 16 In the middle part, the arrows are respectively assigned to the following figures, and the Arabic numerals of the figures correspond to the Roman numerals of the arrows.

[0055] Fig.11 The position of the second optical waveguide element 111 is described again. The second optical waveguide element 111 is connected to the second production means tank 14. The second production means tank 14 has a first housing section 41 and a second housing section 42. The first housing section 41 is constructed in one piece with the motor carrier 3. The second housing section 42 is constructed in one piece with the cover molded part 31.

[0056] As in Fig.12 As shown in , the motor carrier 3 has an outer wall 6 with a varying wall thickness d. The outer wall 6 is at least partially visible from the outer side 50 of the working device 101, in particular in the region of the second optical waveguide element 111. The second optical waveguide element 111 extends at least in sections over the entire wall thickness d of the outer wall 6. As a result, light can be irradiated through the outer wall 6 through the following region of the outer wall 6, in which the second optical waveguide element 111 is arranged and in which the second optical waveguide element 111 extends over the entire wall thickness d of the outer wall 6. Advantageously, the second optical waveguide element 111 is at least partially not covered by other structural components of the manually guided working device 101 in the mentioned region. The second optical waveguide element 111 is at least partially visible from the outer side 50 of the manually guided working device 101 on the surface of the manually guided working device 101. The outer wall 6 of the motor carrier 3 partially limits the production material tank 4 at Fig.17 The interior space 20 is shown in FIG.

[0057] Fig.13 Shown along the Fig.10 The direction of the arrow XIII drawn in the figure is a side view of the middle part formed by the motor carrier 3 and the cover shaped part 31. That is, the line of sight is parallel to the Fig.11 The axis of rotation 34 drawn in the figure points to the cover molded part 31. In this view, the positions of the first production means tank 4 and the second production means tank 14 can be clearly seen. The first production means tank 4 is located in the middle part and is away from Figure 2 The second production material tank 14 is located on the side of the middle part facing the handle 9. In the installed state of the working device 101, a first production material tank 4 and a second production material tank 14 are arranged between them. Figure 7 The drive motor 2 is schematically drawn in.

[0058] The second housing section 42 of the second production means tank 14 is formed entirely of a light-transmissive material.

[0059] In accordance with Figure 1 and 3 In the embodiments of the invention, the entire shaped cover part 31 is made of a light-permeable material. The entire shaped cover part 31 is made of the translucent material described. The entire shaped cover part 31 has the transmission value between 20% and 50% for visible light, which has been described and measured according to the standard ISO 2471. By making the entire shaped cover part 31 light-permeable, the shaped cover part 31 can be manufactured simply.

[0060] In the mounted state of the manually guided working device 101, the cover molded part 31 is covered by components of the manually guided working device 101 outside the area of ​​the production material tank 4, 14, so that light is prevented from entering the cover molded part 31 next to the production material tank 4, 14 in the parking position. Fig. 9 , it is shown that the cover molded part 31 is covered by a housing component 32 outside the region of the production material tank 4 , 14 .

[0061] The second housing section 22 of the first production means tank 4 has a first tank opening 24 of the first production means tank 4. Fig.13 The first tank opening 24 shown in FIG. 1 opens a view into the interior space 20 of the first production means tank 4. The second housing section 42 of the second production means tank 14 has a second tank opening 44 in a similar manner. Figure 4 The internal space 40 of the second production material tank 14 can be identified. Fig. 9 As shown in the figure, the first tank opening 24 is closed by the first tank cover 25. The second tank opening 44 is closed by the second tank cover 45. It can be provided that the tank covers 25, 45 are light-transmissive and translucent. However, in the embodiment, the tank covers 25, 45 are not transparent to visible light.

[0062] exist Figures 17 to 19 In the figure, the motor carrier 3 and the cover molded part 31 of the middle part are shown away from each other. Figures 17 to 19It is clear that the interior space 20 of the first means of production tank 4 is formed not only by the motor carrier 3 but also by the cover molded part 31. The interior space 40 of the second means of production tank 14 is also formed not only by the motor carrier 3 but also by the cover molded part 31. Not only the motor carrier 3 but also the cover molded part 31 have cavities in order to form the first means of production tank 4. The motor carrier 3 and the cover molded part 31 also have cavities in order to form the second means of production tank 40. The cavities are consistent with each other at the connecting surface. When the motor carrier 3 and the cover molded part 31 are joined, the interior space 20 of the first means of production part 4 and the interior space 40 of the second means of production tank 14 are formed by the cavities of the motor carrier 3 and the cover molded part 31 that are consistent with each other.

[0063] As in Fig.19 As shown in FIG. 1 , the motor carrier 3 has an outer surface 7. The outer surface is at least partially formed from the outer surface of the motor carrier 3. Figure 4 The outer side 50 of the working instrument 101 shown in FIG. is visible. Fig.19 The second light-guiding element 111 shown in FIG. 1 extends over at least 5% of the surface 7. Figures 3 to 19 In the embodiment of the invention, the second light guide element 111 extends over at least 20% of the surface 7. It can be provided that the second light guide element 111 extends over less than 30% of the surface 7 of the motor carrier 3. Figures 3 to 19 This is not the case in the embodiment of the invention. The second light-guiding element 111 comprises the entire first housing section 21 of the first production material tank 4. Figures 3 to 19 In the exemplary embodiment, the second light-guiding element 111 comprises the entire motor carrier 3 . In the exemplary embodiment, the second light-guiding element 111 extends over the entire surface 7 of the motor carrier 3 that is visible from the outside. The second light-guiding element 111 is formed in the motor carrier 3 .

[0064] The optical guide elements 11, 111 of the working apparatus 1, 101 are arranged according to Figures 1 to 19 In an embodiment of the present invention, the optical waveguide elements 11 and 111 are made of plastic. The optical waveguide elements 11 and 111 are made of fiber-reinforced plastic. The fiber-reinforced plastic comprises between 30 weight percent (Gew.-%) and 40 weight percent fibers, in an embodiment more than 33 weight percent and up to and including 35 weight percent. In an embodiment, the fiber-reinforced plastic comprises more than 33 weight percent fibers. In an embodiment, the fibers are glass fibers. By applying a plastic having between 30 weight percent and 40 weight percent glass fibers to the optical waveguide elements 11, 111, the optical waveguide elements can be translucent and at the same time have the required strength and rigidity. It can also be provided that the optical waveguide elements are made of fiber-free plastic.

[0065] Less than 0.1 weight percent of pigment is mixed into the plastic of the light guide elements 11, 111. The material of the light guide elements 11, 111 contains the material PA6GF35natur. In the embodiment, the wall thickness of the motor carrier 3 in the region of the light guide elements 11, 111 is less than 2 mm. An optical brightener is mixed into the material of the light guide elements 11, 111. This results in a special white tint of the material. The optical brightener is a UV-active optical brightener.

[0066] In order to improve the resistance of the light guide element 11 , 111 to UV light, a stabilizer is added to the granular material from which the plastic for the light guide element 11 , 111 is produced. This reduces the risk of discoloration of the light guide element 11 , 111 under the influence of UV light.

[0067] In the exemplary embodiment, the cover molded part 31 is made of the same material as the light-conducting elements 11 , 111 . As a result, a good light transmission with an aimed transmission value is achieved for the second housing section 22 of the first production means tank 4 and the second housing section 42 of the second production means tank 14 . By using a whitening agent for the material of the cover molded part 31 , the contrast effect between the production means 5 , 15 present in the production means tank 4 , 14 and the second housing section 22 , 42 is enhanced. As a result, the filling status of the production means tank 4 , 14 can be more clearly recognized.

[0068] Advantages and features emphasized for one exemplary embodiment may also be transferred to other exemplary embodiments or combined with features and advantages of other exemplary embodiments.

Claims

1. A manually guided working apparatus, comprising a drive motor (2), a production material tank and a motor carrier (3), wherein the drive motor (2) is held at the motor carrier, wherein: The production means tank has a first shell section (21) and a second shell section (22), wherein at least a portion of the second shell section (22) is formed of a light-transmissive material in order to identify the filling condition of the production means tank, wherein the motor carrier (3) has a light-transmissive optical element (11, 111) for guiding light into the production means tank, characterized in that the first shell section (21) is constructed integrally with the motor carrier (3), and the optical element (111) includes the entire first shell section (21) of the production means tank.

2. A manually guided working instrument according to claim 1, It is characterized in that The first housing section (21) of the production material tank is at least partially covered by a light-impermeable element (23) of the working device (1, 101).

3. The manually guided working instrument according to claim 1, It is characterized in that The entire second shell section (21) of the production material tank is formed of a light-transmissive material.

4. The manually guided working instrument according to claim 1, It is characterized in that The light guiding element (11, 111) is translucent.

5. The manually guided working instrument according to claim 1, It is characterized in that The light-conducting element (11, 111) is made of plastic.

6. The manually guided working instrument according to claim 5, It is characterized in that The optical waveguide element (11, 111) is made of fiber-reinforced plastic, wherein the plastic contains between 30 and 40 percent by weight of fibers.

7. The manually guided working instrument according to claim 5, It is characterized in that Less than 0.1 weight percent of pigment is admixed into the plastic.

8. The manually guided working instrument according to claim 1, It is characterized in that The motor carrier (3) has an outer wall (6), and the light guide element (11, 111) is part of the outer wall (6) of the motor carrier (3).

9. The manually guided working instrument according to claim 8, It is characterized in that The light-conducting element (11, 111) extends over at least a portion of the wall thickness (d) of the outer wall (6) of the motor carrier (3).

10. The manually guided working instrument according to claim 9, It is characterized in that The light-conducting element (11, 111) extends over the entire wall thickness (d) of the outer wall (6) of the motor carrier (3).

11. The manually guided working instrument according to claim 1, It is characterized in that The motor carrier (3) has an outer surface (7), and the light-conducting element (111) extends over at least 5% of the surface (7).

12. The manually guided working instrument according to claim 1, It is characterized in that The optical waveguide element (111) includes the entire motor carrier (3).

13. The manually guided working instrument according to claim 1, It is characterized in that The production means tank is an oil tank.

14. The manually guided working instrument according to claim 1, It is characterized in that The production means tank is a fuel tank.

15. The manually guided working instrument according to claim 1, It is characterized in that The working instrument is a motor chain saw, the production means tank is a first production means tank (4), the working instrument (1) includes a second production means tank (14), the first production means tank (4) is an oil tank, and the second production means tank (14) is a fuel tank.

16. A manually guided working instrument according to claim 15, It is characterized in that The light-guiding element (11, 111) of the oil tank and the light-guiding element (11, 111) of the fuel tank are formed by a single structural component.

17. The manually guided working instrument according to claim 1, It is characterized in that The manually guided working device (1, 101) has a tool, and the motor carrier (3) carries the tool.

18. The manually guided working instrument according to claim 11, It is characterized in that The light-guiding element (111) extends over 20% of the surface (7).

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