JP4725434B2 - Prism for switch - Google Patents

Description

  The present invention relates to a switch prism used in an indicator lamp portion of a switch device.

  2. Description of the Related Art Conventionally, there is known a handle type switch that is installed on an indoor wall surface or the like and performs switching operation of turning on / off an indoor lamp by pressing a handle that is swingably provided (for example, Patent Document 1).

  In this type of handle type switch, light from a light source provided in the switch device is emitted from a light transmitting window provided on the surface of the switch device, and light emitted from the light transmitting window is further emitted by a prism. Light is emitted to a display window provided on a handle that covers the surface of the switch device, and the display window is used as a display lamp.

That is, the prism functions as a light guiding means between the light transmission window and the display window, and is particularly effective when the light transmission window and the display window are shifted up and down due to the structure. In Patent Document 1, the prism is also used as light distribution means for appropriately distributing outgoing light in the vertical direction.
JP 2004-95366 A

  In the above-mentioned Patent Document 1, the light distribution characteristic in the vertical direction can be adjusted as appropriate. However, in this type of conventional switch including this Patent Document 1, the light distribution characteristic in the left-right direction is not particularly adjusted. In some cases, the left and right viewing angles of the lamp become narrow.

  Therefore, an object of the present invention is to obtain a switch prism capable of adjusting the left and right light distribution characteristics in a switch prism that guides light from a switch device to a display window provided on a handle.

According to the first aspect of the present invention, in the switch prism that guides light emitted from the switch device toward a display window provided on a handle disposed on the surface of the switch device , the switch device includes: viewed from the front of being attached to the wall and a vertical light distribution unit for adjusting the vertical direction of the light distribution, and a lateral direction light distribution unit for adjusting the lateral direction of the light distribution, with each comprising separately, the left and right The direction light distribution unit is provided on the front side in the light traveling direction from the vertical direction light distribution unit.

According to a second aspect of the present invention, the first prism includes a first prism and a second prism disposed on the front side of the light traveling direction from the first prism, and the first prism includes a plurality of incident beams. The light incident from the first part is guided to one outgoing part, and the left and right light distribution part is formed in the incoming part of the second prism or the outgoing part of the first prism, and the outgoing part of the second prism The above-mentioned vertical direction light distribution part is formed in.

In the invention of claim 3 , comprising a plurality of incident portions and one emission portion, the light incident from the plurality of incidence portions is guided to one emission portion, and at least of the plurality of incidence portions The left-right direction light distribution part is formed in any one of the above, and the up-down direction light distribution part is formed in the emission part.

In the invention of claim 4, the vertical light distribution section has a light distribution segment corresponding to each of the plurality of incident sections.

In the invention of claim 5 , the vertical light distribution section has an inclined surface inclined by a predetermined angle with respect to the vertical surface, and one of the lower limit light and the upper limit light of the emission range is on the inclined surface. On the other hand, the light is guided to the vertical light distribution section so that the light passes through and exits substantially vertically and the other is refracted by the inclined surface and exits at a predetermined angle.

The invention according to claim 6 is characterized in that the left-right light distribution part has a flat surface, a pair of inclined surfaces, and a surface in which a curved surface is continuous.

According to the first aspect of the present invention, since the left and right direction light distribution section is provided, the left and right light distribution characteristics can be adjusted appropriately. In addition, since the vertical light distribution unit and the horizontal light distribution unit are separately provided, it is possible to improve visibility by giving each of them efficient light distribution characteristics. Also, since the left / right light distribution part is provided in front of the vertical light distribution part, the light distribution characteristic in the left / right direction can be improved without degrading the efficiency of the light distribution characteristic in the vertical direction. it can.

According to the second aspect of the present invention, after the light is guided by the first prism, the vertical and left and right light distribution characteristics can be adjusted, so that the light guide loss can be reduced.

According to the invention of claim 3, the light can be guided to the emitting portion and the light distribution characteristics of the top and bottom and the left and right can be adjusted by one prism, so that the configuration is simplified and the productivity is improved. Can do.

According to the invention of claim 4 , it is possible to adjust the light distribution characteristic more appropriately for the light incident from each incident portion.

According to the invention of claim 5 , it is easier to make a wide emission range (light distribution range) in the vertical direction by using the passage and refraction on the inclined surface, and by using the light guide to the vertical light distribution unit. Can be set.

According to the invention of claim 6 , light distribution in three directions corresponding to a flat surface and a pair of inclined surfaces is possible, and a curved surface connecting between the pair of inclined surfaces is provided, so that the three directions are provided. Light distribution in the direction between them is also possible.

  (First Embodiment) FIG. 1 is an exploded perspective view of a switch including a prism according to this embodiment, and FIG. 2 is a side view (partial sectional view) showing the positional relationship between each switch device in the switch and the prism. 3 is a schematic diagram (side view) showing an optical path in the first prism, FIG. 4 is a schematic diagram (side view) of a vertical light distribution unit, and FIG. 5 is a diagram showing the first prism and the second prism. FIG. 6 is a schematic view (plan view) of the light distribution unit in the left-right direction.

  The handle type switch 1 of this embodiment is formed in a rectangular shape as a whole in a front view, and the handle 4 is exposed on the surface in a state surrounded by a decorative plate 5.

  This handle type switch 1 is constructed by assembling each part with a mounting frame 2 as a base. The mounting frame 2 is fixed by screwing or the like to a construction surface such as a wall (not shown) or an embedding box (not shown) embedded in the construction surface.

  In the present embodiment, the three switch devices 3 (3U, 3M, 3L) are respectively locked to the mounting frame 2 in a state where the switch devices 3 (3U, 3M, 3L) are inserted vertically adjacent to the substantially rectangular opening 2a. .

  Each switch device 3 is provided with a box-shaped vessel body 3a and has a substantially rectangular parallelepiped appearance as a whole. A rectangular opening 3b is formed in the front surface 3e of the container 3a, and the push button handle 3c is exposed from the opening 3b. The push button handle 3c is swingably supported by the container body 3a, and switching of the contacts in the container body 3a is performed by operating the push button handle 3c.

  Moreover, a substantially rectangular light-transmitting window 3d is formed on the front surface 3e of the container 3a, and a light-emitting body (for example, an LED bare chip; illustrated) provided in a lamp module (not shown) built in the container 3a. It receives light from (not shown) and transmits (emits) light toward the display window 4 c of the handle 4.

  The decorative plate 5 is made of, for example, synthetic resin formed into a substantially rectangular frame shape, and functions as a frame surrounding the periphery of the handle 4. That is, a rectangular opening 5a is formed at the center, and three handles 4 (4U, 4M, 4L) are arranged adjacent to each other so as to fill the opening 5a.

  Each handle 4 functions as an operation unit that is pressed by a finger or the like and transmits the pressing operation to the push button handle 3c. In the present embodiment, the handle 4 is supported by the switch device 3 through the claws 4b and the like so as to cover the front surface 3e of the container 3a, and is configured to swing in conjunction with the push button handle 3c. ing.

  Each handle 4 (4U, 4M, 4L) is provided in one-to-one correspondence with a plurality (three in the present embodiment) of switch devices 3. That is, in this embodiment, the three switch devices 3 (3U, 3M, 3L) are arranged side by side in the longitudinal direction (vertical direction) of the opening 2a of the mounting frame 2, and the longitudinal direction of the mounting frame 2 (vertical direction) The same number (that is, three) of split-type handles 4 (4U, 4M, 4L) are provided.

  Here, as shown in FIG. 1, in this embodiment, the vertical widths of the three handles 4 are wider than the vertical widths of the three switch devices 3. Accordingly, the transparent window 3d of the switch device 3M located at the center overlaps the display window 4c of the handle 4M, but the display window 4c of the handle 4U corresponding to the transparent window 3d of the switch device 3U located above. Is shifted upward, and the display window 4c of the corresponding handle 4L is shifted downward with respect to the light transmitting window 3d of the switch device 3L located on the lower side.

  Therefore, in the present embodiment, as shown in FIGS. 2A to 2C, when the prism 8 is provided on the back side of each handle 4 and the switch device 3 and the handle 4 are vertically displaced. In addition, the light emitted from the translucent window 3d is reliably guided to the display window 4c and can be emitted from the display window 4c. As is clear from FIGS. 2A to 2C, the same prism 8 is used for the upper, middle, and lower stages.

  The prism 8 can be obtained by molding a light-transmitting synthetic resin. In the present embodiment, the prism 8 includes a first prism 6 on the switch device 3 side and a second prism 7 on the display window 4c side. Has been. In the present embodiment, the first prism 6 mainly has a function of guiding light from a plurality of incident portions (the bottom surfaces 6b and 6b and the inner surface 6h of the recess 6a) toward an end surface 7a as one emission portion. The second prism 7 mainly has a function of adjusting the light distribution characteristic.

  As shown in FIG. 3, the first prism 6 has a bottom surface 6b and a top surface 6c that are parallel to each other, and has a shape that extends vertically in a side view. A trough-shaped recess 6a is formed at the center in the vertical direction of the bottom surface 6b, and a substantially center portion of the back surface 6h of the recess 6a bulges toward the bottom surface 6b. Further, the inner side surfaces 6g and 6g of the recess 6a are inclined surfaces that slightly bulge.

  The upper and lower outer surfaces 6f and 6f between the bottom surface 6b and the top surface 6c are perpendicular to the vertical direction so that the vertical width gradually decreases from the bottom surface 6b and 6b side toward the top surface 6c and 6c side. Is inclined by approximately 45 °.

  In addition, a protrusion 6d is formed at the center in the vertical direction of the top surface 6c. An end face 6e of the protruding portion 6d serves as an emission portion of the first prism 6.

  On the other hand, as shown in FIG. 2, the second prism 7 includes a substantially rectangular columnar body portion 7 d and leg portions 7 e and 7 e that protrude in the vertical direction from the upper and lower ends of the first prism 6 side. At the same time, a substantially trapezoidal concave portion 7b is formed at a substantially central portion in the vertical direction on the first prism 6 side in a relatively shallow side view. The main body 7d is loosely inserted into the opening of the display window 4c of the handle 4, the end surface 7a is exposed from the display window 4c, and the end surface 7a and the surface 4a of the handle 4 are substantially flush with each other. is there. In the second prism 7, the back surface 7c of the recess 7b is an incident portion, and the end surface 7a is an emission portion.

  Here, as shown in FIG. 2 (a), in the upper stage, the light transmission window 3d of the switch device 3 is disposed at a position overlapping the lower bottom surface 6b of the first prism 6, and this lower side. The bottom surface 6b is an incident part.

  In the upper first prism 6, light is guided as shown by a two-dot chain line in FIG. That is, the light incident in the substantially horizontal direction from the lower bottom surface 6b as the incident portion is reflected by the lower outer surface 6f and the inner side surface 6g and guided to the protruding portion 6d, and from the end surface 6e as the emitting portion. Emitted. At this time, in the present embodiment, the angle from the outer surface 6f and the inner surface 6g functioning as a reflecting surface in the first prism 6 and the angle (shape such as a bulging shape) of the inner surface 6g are appropriately adjusted, so The angle of attack of the emission range lower limit light Ul is set to about 5 ° with respect to the horizontal direction, and the elevation angle of the emission range upper limit light Uu is set to about 30 ° with respect to the horizontal direction.

  The light emitted from the end surface 6e as the emitting portion is incident on the back surface 7c as the incident portion of the second prism 7, but both the end surface 6e and the back surface 7c are straight in the vertical direction and parallel to each other. Thus, the light traveling direction (angle) hardly changes in the vertical direction. Further, light is not reflected in the second prism 7, and the traveling direction (angle) of the light does not change in the vertical direction up to the end face 7a.

  Here, in the present embodiment, as shown in FIG. 4, a vertical light distribution unit that distributes light in the vertical direction is formed on the end surface 7 a of the second prism 7.

  In this vertical direction light distribution section, a plurality of (that is, three) light distribution segments 7aU, 7aM, 7aL corresponding to the upper, middle, and lower stages are set, and the light distribution segment 7aU corresponding to the upper stage has an end face 7a. It is set on the lower side.

  This light distribution segment 7aU has a plurality of upper and lower sawtooths having an obliquely upward inclined surface (plane) 7a1 inclined approximately 30 ° with respect to the vertical direction and a horizontal surface (plane) 7a3 extending substantially horizontally in the vertical direction. (Only two stages are shown in FIG. 4). At this time, by reducing the height of the saw blade (the horizontal surface 7a3 is shortened in the horizontal direction) and making it finer, the unevenness on the surface can be made inconspicuous and the inside becomes difficult to see, so that the light emitting means (LED, etc.) It is possible to suppress the occurrence of a so-called back-eye state in which the light-emitting means can be seen to move depending on the angle seen from the back side, and to make it appear as if light is emitted from the end surface 7a, thereby reducing the sense of discomfort.

  By the way, as described above, in the upper stage, the elevation angle of the emission range upper limit light is approximately 30 ° with respect to the horizontal direction even when it reaches the end surface 7a, and therefore, as shown by a two-dot chain line in FIG. The emission range upper limit light Uu enters the inclined surface 7a1 substantially perpendicularly, and is emitted at the same angle without being refracted.

  On the other hand, the angle of attack of the emission range lower limit light Ul is approximately 5 ° with respect to the horizontal direction even when it reaches the end surface 7a. In this case, the emission range lower limit light Ul is indicated by a two-dot chain line in FIG. As shown by, the inclined surface 7a1 is refracted obliquely downward, and the angle of attack with respect to the horizontal direction is approximately 30 °.

  That is, in the upper stage, the emission surface upper limit light Uu passes through the inclined surface 7a1 substantially vertically and exits at an elevation angle of approximately 30 ° with respect to the horizontal direction by the inclined surface 7a1 of the light distribution segment 7aU. The light Ul is refracted by the inclined surface 7a1 and is emitted at an angle of attack of about 30 ° with respect to the horizontal direction. Thus, the angle setting of the emission range, that is, the light distribution range can be facilitated by causing the emission range upper limit light Uu to travel straight on the inclined surface 7a1.

  Next, as shown in FIG. 2C, in the lower stage, the light transmission window 3d of the switch device 3 is disposed at a position overlapping the upper bottom surface 6b of the first prism 6, and this upper bottom surface. 6b becomes an incident part.

  Here, in this embodiment, as will be apparent from FIG. 2, the shape and arrangement of each part in the lower stage are symmetrical with the shape and arrangement of each part in the upper stage with respect to a horizontal line (horizontal plane) passing through the vertical center of the display window 4c. It has become. That is, in the first prism 6 in the upper stage, light is guided as shown by a one-dot chain line in FIG. 3, and the light incident in the substantially horizontal direction from the upper bottom surface 6b as the incident portion is The light is reflected by the upper outer surface 6f and the inner surface 6g, guided to the protruding portion 6d, and emitted from the end surface 6e as the emitting portion. At this time, as described above, the angle and shape (bulging shape or the like) of the outer surface 6f and the inner surface 6g functioning as the reflecting surfaces in the first prism 6 are appropriately adjusted. The angle of attack of the outgoing range lower limit light Ll of the outgoing light from 6e is about 30 ° with respect to the horizontal direction, and the elevation angle of the outgoing range upper limit light Lu is about 5 ° with respect to the horizontal direction.

  Also in the lower stage, the light emitted from the end surface 6e as the emitting portion reaches the end surface 7a of the second prism 7 with almost no angle change in the vertical direction. However, it reaches the upper light distribution segment 7aL in the end face 7a.

  The light distribution segment 7aL has sawtooths having a slanting downwardly inclined surface (plane) 7a1 inclined approximately 30 ° with respect to the vertical direction and a horizontal surface (plane) 7a3 extending substantially horizontally in the vertical direction. (Only two stages are shown in FIG. 4).

  Therefore, in the lower stage, the emission range upper limit light Lu is refracted by the inclined surface 7a1 by the inclined surface 7a1 of the light distribution segment 7aL and is approximately 30 ° with respect to the horizontal direction, as shown by a one-dot chain line in FIG. On the other hand, the emission range lower limit light Ll is emitted at an elevation angle of approximately 30 ° with respect to the horizontal direction through the inclined surface 7a1 while being emitted at an elevation angle. As described above, in the lower stage, the angle of the emission range, that is, the light distribution range can be easily set by causing the emission range lower limit light Ll to travel straight on the inclined surface 7a1.

  As shown in FIG. 2 (b), in the middle stage, the light transmission window 3d of the switch device 3 is arranged at a position overlapping the inner surface 6h of the concave portion 6a of the first prism 6, and this inner surface. 6h becomes an incident part.

  Here, the concavo-convex shape of the back surface 6h is set so that the angle of attack of the emission range lower limit light Ml of the emitted light from the end surface 6e and the elevation angle of the emission range upper limit light Mu are both approximately 20 ° with respect to the horizontal direction. ing.

  In the middle stage, since the transparent window 3d and the display window 4c are overlapped, there is no need to guide the light in the vertical direction by reflecting the light from the outer surface 6f or the inner surface 6g. Can be performed relatively easily only by setting the concave-convex shape of the back surface 6h.

  Also in this middle stage, the light emitted from the end face 6e as the emitting portion reaches the end face 7a of the second prism 7 with almost no angle change in the vertical direction. However, it reaches the light distribution segment 7aM located at the center in the vertical direction in the end face 7a.

  The light distribution segment 7aM is mainly composed of a vertical surface 7a2 extending in the vertical direction, and is disposed on the upper side and is a part (lower region) of an inclined surface (plane) 7a1 that is inclined downward and inclined approximately 30 ° with respect to the vertical direction. And a part (upper region) of an inclined surface (planar surface) 7a1 that is disposed on the lower side and is inclined approximately 30 ° with respect to the vertical direction. In the light distribution segment 7aM, when the emission range upper limit light Mu having an elevation angle of about 20 ° with respect to the horizontal direction is incident on the vertical surface 7a2, the light is refracted upward, the elevation angle with respect to the horizontal direction becomes about 30 °, and the vertical surface 7a2 When the emission range lower limit light Ml having an angle of attack of about 20 ° with respect to the horizontal direction is incident, the light is refracted downward and the angle of attack with respect to the horizontal direction becomes about 30 °. That is, the vertical range 7a2 of the light distribution segment 7aM causes the emission range upper limit light Mu to be emitted at an elevation angle of approximately 30 ° with respect to the horizontal direction, while the emission range lower limit light Ml is horizontal, as indicated by a broken line in FIG. The light is emitted at an angle of attack of approximately 30 ° with respect to the direction.

  As described above, in this embodiment, for each of the upper, middle, and lower stages, almost the same emission range (light distribution range) that is ± 30 ° up and down with respect to the horizontal direction can be obtained. There is an advantage that a difference in appearance does not occur, a more reliable visibility is ensured, and a sense of incongruity can be reduced.

  On the other hand, in the present embodiment, as shown in FIG. 5, a left-right light distribution portion that distributes light in the left-right direction is formed on the back surface 7 c of the concave portion 7 b as the incident portion of the second prism 7. .

  The back surface 7c constituting the left and right light distribution portion is formed as a continuous surface of a flat surface 7c2, a pair of inclined surfaces 7c1 and 7c1, and a curved surface 7c3, and is a pair of inclined surfaces facing each other and inclined in opposite directions. The surfaces 7c1 and 7c1 and the curved surface 7c3 between them are smoothly continuous. According to this configuration, light distribution is possible in three directions corresponding to the flat surface 7c2 and the pair of inclined surfaces 7c1, and the curved surface 7c3 that connects the pair of inclined surfaces 7c1 is provided. Light distribution in the direction between the two is also possible. Even when a light source having a narrow emission range, such as an LED, is used, an intended emission range can be obtained by appropriately adjusting the inclination angle and the like. The left-right direction light distribution part can also be formed on the end face 6 e of the first prism 6.

  According to the above embodiment, since the left and right direction light distribution unit is provided, the left and right light distribution characteristics can be adjusted, and the vertical direction light distribution unit and the left and right direction light distribution unit are provided separately. More appropriate adjustment is possible. Moreover, since the emission range can be expanded in each light distribution unit, a wide emission range can be realized while reducing light guide loss using a light source with a narrow emission range such as an LED.

  In the present embodiment, since the left-right direction light distribution unit is provided on the front side of the light traveling direction from the up-down direction light distribution unit, the left-right direction light distribution characteristic is reduced without degrading the efficiency of the vertical light distribution characteristic. Can be good. Then, the adjustment of the light distribution characteristics in the upper and lower directions can be performed further on the light traveling direction side, and the switch device 3 and the display window 4c are shifted up and down to guide the light in the prism 8 in the vertical direction. In addition, since it is possible to adjust the light distribution characteristics in the upper and lower directions after light guiding in the vertical direction (that is, to expand the emission range to an appropriate range), it is possible to reduce the loss during light guiding (light guiding loss). it can. Further, the left and right light distribution characteristics can be adjusted more in front of the light traveling direction, and the light is guided when the display window 4c is wider in the left-right direction than in the vertical direction (that is, when the display window 4c is long in the horizontal direction). Loss can be reduced.

  In the present embodiment, the first prism 6 guides the light incident from the bottom surfaces 6b and 6b and the back surface 6h as a plurality of incident portions to the end surface 6e as one emission portion, and the second prism 6 A left and right light distribution portion is formed on the back surface 7 c as the incident portion of the prism 7 or the end surface 6 e as the emission portion of the first prism 6, and the vertical distribution on the end surface 7 a as the emission portion of the second prism 7. Since the light portion is formed, the light distribution loss can be reduced because the light distribution characteristics in the vertical and horizontal directions can be adjusted after the light is appropriately guided in the vertical direction by the first prism 6. In addition, according to the present embodiment, since the light is distributed by one horizontal light distribution unit after being guided, the right and left light distribution varies depending on the size of the positional deviation between the light source and the display window. Can be suppressed. Further, there is an advantage that the light distribution part can be easily set by the amount of the boundary surface that is divided into the first prism 6 and the second prism 7 and increases. Furthermore, if the second prism 7 is made of a material having a high diffusion effect such as a milky white material, the diffusion effect can be enhanced without affecting the light guide by the first prism 6.

  In the present embodiment, since the first prism 6 has a vertically symmetrical shape, it can be the same in all the upper, middle, and lower stages.

  In the present embodiment, since the end surface 7a as the vertical light distribution portion is provided with the light distribution segments 7aU, 7aM, and 7aL corresponding to the bottom surfaces 6b and 6b and the back surface 6h as the plurality of incident portions, It is possible to adjust the light distribution characteristics more appropriately for the light incident from the incident portion.

  In the present embodiment, an inclined surface 7a1 that is inclined at a predetermined angle (± 30 ° in the present embodiment) with respect to the vertical surface is provided on the end surface 7a as the vertical light distribution unit, and the passage and refraction on the inclined surface 7a1 are performed. The light emission range (light distribution range) that extends evenly in the vertical direction with respect to the horizontal direction can be easily adjusted by adjusting the light guide to the light distribution unit in the vertical direction in the prism 8 (first prism 6). Can be realized.

  (Second Embodiment) FIG. 7 is a schematic view (side view) of a vertical light distribution section of a prism according to this embodiment. In the present embodiment, the same components as those in the first embodiment are provided. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted.

  The configuration according to this embodiment is exactly the same as that of the first embodiment, except that the shape of the vertical light distribution portion formed on the end surface 7a of the second prism 7 is different.

  The end surface 7a has the same shape as the upper-stage light distribution segment 7aU and the middle-stage light distribution segment 7aM of the first embodiment. That is, the end surface 7a has a plurality of saw teeth in the vertical direction in the vertical direction, with an obliquely upward inclined surface (plane) 7a1 inclined approximately 30 ° with respect to the vertical direction and a horizontal surface (plane) 7a3 extending substantially horizontally. It has the structure provided with the vertical surface 7a2 extended in a perpendicular direction on the upper side while arranging.

  In such a configuration, the light can be emitted obliquely upward by reflecting the light on the horizontal surface 7a3. Therefore, a simpler configuration can be achieved without providing two types of inclined surfaces as in the first embodiment. Thus, a wide light distribution range in the vertical direction can be secured.

  (Third Embodiment) FIG. 8 is a side view of a prism according to this embodiment. In the present embodiment, the same components as those in the first embodiment are provided. Therefore, the same components are denoted by the same reference numerals, and redundant description is omitted.

  The configuration according to the present embodiment is exactly the same as that of the first embodiment except that the prism 8 divided into the first prism 6 and the second prism 7 is replaced with an integrated prism 8A. is there.

  The prism 8A has a bottom surface 8b and a top surface 8c that are parallel to each other, and has a shape that extends vertically in a side view. A trough-shaped concave portion 8a is formed at the center in the vertical direction of the bottom surface 8b, and a substantially central portion of the back surface 8h of the concave portion 8a bulges toward the bottom surface 8b. Further, the inner side surfaces 8g, 8g of the recess 8a are inclined surfaces that slightly bulge.

  The upper and lower outer surfaces 8f, 8f between the bottom surface 8b and the top surface 8c are perpendicular to the vertical direction so that the vertical width gradually decreases from the bottom surface 8b, 8b side to the top surface 8c, 8c side. It is inclined approximately 45 °.

  In addition, a protrusion 8d is formed at the center in the vertical direction of the top surface 8c. An end face 8e of the protruding portion 8d becomes an emission portion of the prism 8. The protrusion 8d is loosely inserted into the opening of the display window 4c of the handle 4, the end surface 8e is exposed from the display window 4c, and the end surface 8e and the surface 4a of the handle 4 are substantially flush with each other. It is.

  Here, the vertical light distribution portion is formed on the end surface 8e, and the horizontal light distribution portion is formed on the bottom surface 8b. The vertical light distribution part formed on the end face 8e can have the same shape as that of the first or second embodiment, and the horizontal light distribution part formed on the bottom surface 8b is the same as that of the first embodiment. Similar shapes can be used. Note that the light guide angle is increased by the provision of the left-right light distribution portion on the bottom surface 8b as the incident portion, but the light is set so as not to exceed the total reflection angle on the outer surface of the prism 8A and leaked to the outside (light guide loss). ) Does not occur.

  According to the present embodiment, the single prism 8A can guide the light to the emitting portion and adjust the vertical and horizontal light distribution characteristics, thereby simplifying the configuration and improving productivity. it can. In addition, the exit surface and the incident surface are reduced by the amount of integration, and scattering loss on the exit surface and the incident surface can be reduced.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made.

The disassembled perspective view of the switch containing the prism concerning embodiment of this invention. The side view (partial longitudinal cross-sectional view) which shows the positional relationship of each switch apparatus in the switch containing the prism concerning 1st Embodiment of this invention, and a prism. The schematic diagram (side view) which shows the optical path in the 1st prism which comprises the prism concerning 1st Embodiment of this invention. The schematic diagram (side view) of the up-down direction light distribution part of the prism concerning 1st Embodiment of this invention. The top view of the 1st prism and the 2nd prism which comprise the prism concerning 1st Embodiment of this invention. The schematic diagram (plan view) of the left-right direction light distribution part of the prism concerning 1st Embodiment of this invention. The schematic diagram (side view) of the up-down direction light distribution part of the prism concerning 2nd Embodiment of this invention. The side view of the prism concerning 3rd Embodiment of this invention.

Explanation of symbols

Ll, Ml, Ul Emission range lower limit light Lu, Mu, Uu Emission range upper limit light 3, 3L, 3M, 3U Switch device 4, 4L, 4M, 4U Handle 4c Display window 6 First prism 6b Bottom surface (incident part)
6e End face (outgoing part)
6h Back surface (incident part)
7 Second prism 7a End face (outgoing part)
7a1 Inclined surface 7aU, 7aM, 7aL Light distribution segment 7c Back surface (incident part)
7c1 Inclined surface 7c2 Flat surface 7c3 Curved surface 8, 8A Prism 8b Bottom surface (incident part)
8e End face (outgoing part)
8h back surface (incident part)

Claims (6)

In the switch prism that guides the light emitted from the switch device toward the display window provided on the handle arranged on the surface of the switch device,
Viewed from the front in a state in which mounting the switching device on the wall, the vertical light distribution unit for adjusting the vertical direction of the light distribution, and a lateral direction light distribution unit for adjusting the lateral direction of the light distribution, with each with separately ,
The switch prism, wherein the left-right light distribution part is provided on the front side in the light traveling direction from the vertical light distribution part. A first prism, and a second prism disposed on the light traveling direction side of the first prism,
The first prism guides light incident from a plurality of incident portions to one emission portion,
The left-right direction light distribution part is formed at the incident part of the second prism or the emission part of the first prism, and the up-down direction light distribution part is formed at the emission part of the second prism. The switch prism according to claim 1 . It comprises a plurality of incident portions and one exit portion, and guides light incident from the plurality of entrance portions to one exit portion,
And forming the lateral direction light distribution section in at least one of said plurality of incident portions, switch of claim 1, wherein the forming the vertical light distribution portion to the exit portion prism. 4. The switch prism according to claim 2, wherein the vertical light distribution portion includes a light distribution segment corresponding to each of the plurality of incident portions. 5. The vertical light distribution unit has an inclined surface inclined at a predetermined angle with respect to a vertical surface, and one of the lower limit light and the upper limit light of the emission range passes through and substantially perpendicular to the inclined surface. as the other is emitted at a predetermined angle is refracted at the inclined surface, to any one of claims 1-4 in which light to the vertical direction light distribution unit is characterized that it has to be guided The switch prism described. The right and left direction light distribution portion, a flat surface, a pair of inclined surfaces, and the switch prism according to any one of claims 1-5, characterized in that it has a curved surface was allowed to continuous surface.

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