JP2013088798A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure strength of an entire display system unit of omnidirectional bending orthogonal to an axial direction, reduce the weight, and secure a shortest electrical connection path between a control system unit and a head unit.SOLUTION: A single columnar body 13n with a communication part is disposed inward globes 13a-13d, the communication part of the single columnar body 13n extends across the respective layers of a display unit 13 in an axial direction (Z direction) and communicates the inner space of a control system unit 11 to the inner space of a head unit 12.

Description

  The present invention includes a display system unit having a hollow cylindrical globe extending in the axial direction, and a control system unit that is disposed on one side in the axial direction of the display system unit and performs light emission control of a light source group of the display system unit. The present invention relates to a display device.

  Conventionally, a group of LEDs is stacked in a plurality of stages in the axial direction (the vertical direction in use and coincides with the vertical direction in the reference drawing, the same applies hereinafter), and is covered with a tower-shaped light-transmitting glove. There has been known a structure in which the display system unit is mounted on the upper part of the control system unit.

  As a specific configuration of the tower-type indicator lamp, the control system unit reads the instruction signal in the display section operation instruction section, and transmits a digital signal corresponding to the instruction signal to each display section of the display system unit via the signal line. In addition, there is one that applies a display unit operating voltage to each display unit via a power supply line (see, for example, Patent Document 1).

  In addition, the reflecting member that constitutes a part of the light emitting diode unit has a conical shape, and six connection pins hanging straight from the adjacent light emitting diode unit are straight in the external space (a part of the light path of the light emitting diode). A signal lamp having a configuration in which the lamps are arranged on a line and connected to (inserted into) corresponding connectors has also been known (see, for example, Patent Document 2).

  The former configuration will be described below with reference to FIGS. 10 (a) and 10 (b).

  FIG. 10A is a diagram schematically showing a conventional whole configuration in a partial cross section, and FIG. 10B is a diagram showing a partial configuration of a part of a light emitting unit adjacent in the vertical direction in a partial cross section. is there.

  As shown in FIG. 10 (a), the display system unit extending in the axial direction has a total of four display sections so that four different colors can emit light. Light emitting parts of a predetermined color are respectively mounted in gloves that can be separated from each other.

  Here, the globe 310 of the display unit 410, the globe 320 of the display unit 420, the globe 330 of the display unit 430, and the globe 340 of the display unit 440 are connected to each other so as to be separable from each other by screwing of the male screw ms and the female screw fs. It is placed on the base member B.

  The light emitting unit 210 is located inside the globe 310, the light emitting unit 220 is located inside the globe 320, the light emitting unit 230 is located inside the globe 330, and the light emitting unit 240 is located inside the globe 340. It is installed.

  Moreover, in each light emission part, it mounts so that several LED may stand upright on the upper surface of the board | substrate which comprises the part.

  And in each light emission part, the connector 200 is inserted and fixed to the hole of the center part of each board | substrate, and the main control part MC is connected via the lowest connector C by stacking the light emission part up and down. Are connected to the signal line Cc and the power supply lines Ca and Cb.

  Thereby, each board | substrate is electrically and mechanically connected in series.

  FIG. 10B shows an enlarged connection state of the board 110 and the board 120 adjacent to each other via the connector 200 in the vertical direction.

  As is apparent from this figure, the connector male part 202 of the connector 200 positioned on the upper side is connected to the connector female part 201 of the connector 200 positioned on the lower side so as to be separable.

  Each connector 200 is obtained by holding three conductors a, b, and c on an insulating resin body.

  Each conductor is formed in a rod shape as a whole, a portion located in the connector female portion 201 is formed in a female shape so as to be plugged, and a portion located in the connector male portion 202 is formed in a plug shape. It protrudes downward.

  Therefore, in the connector 200 and the connectors 200 adjacent to each other vertically, the plug portions protruding downward from the conductors a, b, and c of the upper connector are respectively formed as female portions of the conductors a, b, and c of the lower connector. Can be inserted and inserted.

  In this manner, the display portions 410 to 440 are connected electrically and mechanically by stacking the portions excluding each globe in multiple stages so as to be separable from each other.

  JP 2006-30739 A   Japanese Patent No. 3071419

  However, in the conventional configuration described above, it is easy to replace the existing display unit with another one or add a new display unit between the layers, but the connectors adjacent to each other so as to be separable. There was a problem due to the presence of a boundary between 200.

  In other words, when installed in an environment that is susceptible to external vibrations or when inertial force is generated due to a drop impact, displacement stress acts intensively on the boundary, making it easy to separate and separate each other was there.

  For example, in the case of a semiconductor die chip mounting device or a chip mounter device, the pickup head is frequently moved and stopped at a speed of several times per second by driving the motor. There was a possibility that a serious problem would become remarkable.

  In particular, the plurality of connectors 200 connected in multiple stages in series support a light emitting unit including a plurality of LEDs and substrates arranged in each layer, and the lower end of the connected connector 200 is a main control. As described above, when the inertial force acts on the entire display device as described above, the pendulum phenomenon using the fixed portion at the lower end of the connector 200 as a fulcrum as the display unit becomes multistage. Is likely to occur.

  As a result, when displacement in the direction orthogonal to the axial direction occurs in each connector 200, stress concentrates on the boundary portion where the connector male portion 202 of the three conductors a, b, and c is fitted to the connector female portion 201. And it acts as a deformation stress.

  As a result, the parallelism between the connector male part 202 and the connector female part 201 cannot be maintained, and the contact failure between the three conductors, the shearing of the base part of the three conductors a, b, c, or the three There is also a risk of causing an insulation failure due to deformation of the resin body that secures insulation between the conductors.

  Temporarily, in order to solve the above-described problem, in addition to the connector 200 for connection, an attempt to provide a member for mechanically reinforcing the connection between the layers on the outer peripheral side not only makes the structure more complicated, It was also clear that the light emitted from the LED of the light emitting part and traveling in the circumferential direction was blocked on the way, and a sufficient amount of light could not be obtained.

  Further, as another example, a single elongated screw is used to penetrate through the members constituting each layer so that the layers of the display unit can be separated, and the bolts are tightly attached from above and below with bolts. The configuration is also known.

  However, in such a structure, it is necessary to ensure electrical connection between the respective layers by a male pin and a female socket provided outside the long screw.

  Therefore, the structure for connecting the electrodes in sequence between the respective substrates becomes more complicated, and the influence of external vibration and drop impact as described above also acts on the connection portion of the male pin and the female socket. In addition, another problem of blocking the light emitted from the LED has occurred.

  The present invention solves the above-mentioned problem, and while ensuring the strength and weight reduction of the entire display system unit against bending in all directions orthogonal to the axial direction, the control system unit and the control system unit are shortest through the communication portion. It is an object of the present invention to provide a display device that can ensure electrical connection with a head unit.

  In order to solve the above-described conventional problems, according to the display device of the present invention, a display system unit having a hollow cylindrical glove extending in the axial direction and a light source group positioned inside the globe is provided. And a control system unit that controls the light emission of the light source group of the display system unit. The head unit is disposed on the other side in the axial direction of the display system unit, and A single columnar body having a portion is disposed inside the globe, and the communication portion of the single columnar body is characterized in that the internal space of the control system unit communicates with the internal space of the head unit.

  Thereby, weight reduction is realizable, ensuring the intensity | strength of the display system unit with respect to the bending in all directions.

  In addition, an electrical connection path between the control system unit and the head unit, for example, a power supply connection path and a signal transmission path, can be secured in advance through the communication portion, and the displacement stress described above is directly connected to the connection path. In contrast, it can be prevented from acting as a deformation stress, and a stable conduction state can be maintained accordingly.

  According to the display device of the present invention, in addition to the above configuration, the display system unit has a hollow cylindrical globe and a plurality of light source groups that are covered with the globe and stacked apart from each other along the axial direction. The control system unit preferably performs light emission control of the light source group of each layer of the display system unit, and the communication portion of the single columnar body preferably extends across the layers of the display system unit along the axial direction.

  Thereby, since it is not the structure which can be divided | segmented for every layer, weight reduction is realizable, ensuring the intensity | strength of the display system unit with respect to the bending in all directions.

  In other words, even if inertial force due to external vibration or drop impact acts on multiple light source groups or circuit boards, a single columnar body extends in the axial direction and becomes a fulcrum. The displacement in the direction perpendicular to the axial direction of the light source group and the circuit board due to the pendulum phenomenon is reduced, and at the same time, the concentration of the displacement stress can be suppressed.

  In addition, an electrical connection path between the control system unit and the head unit, for example, a power supply connection path and a signal transmission path, can be secured in advance through the communication portion, and the displacement stress described above is directly connected to the connection path. In contrast, it can be prevented from acting as a deformation stress, and a stable conduction state can be maintained accordingly.

  For example, if the control system unit and the head unit are connected via a lead wire accommodated in a communication portion of a single columnar body, the conductor as described in the background art becomes an insulating resin body. There is no need for complicated structures such as using multiple embedded sockets or connecting pins and sockets on the circuit board on which each light source group of the light emitting unit is mounted. In addition, the problem that the stress due to the displacement is concentrated and applied to the connection point of the electrical connection path can be solved extremely effectively.

  According to the display device of the present invention, in addition to the above-described configuration, the single columnar body is formed of a conductive metal material having elasticity, and an orthogonal cross-sectional shape by a plane orthogonal to the axial direction is a U-shape or U It is preferable that the space surrounded by the inner peripheral surface and the virtual plane connecting both ends along the axial direction constitutes a communicating portion.

  Thereby, even if the displacement of the light source group or the circuit board caused by the vibration applied from the outside or the impact of the drop acts on the single columnar body, the displacement stress is absorbed by the elastic deformation and the local stress concentration can be suppressed.

  In addition, the so-called shielding effect that the influence of radio noise entering from the outside to the signal transmitted between the head unit and the control system unit is reduced can be effectively obtained, and a stable pulse signal with little distortion can be transmitted. .

  That is, a signal transmission path for data communication can be secured in a stable state.

  On the other hand, a form in which the cross-sectional shape is a U-shape or a U-shape, that is, a form in which the communicating portion located on the inner peripheral side of a single columnar body is opened along the axial direction (connected to the external space) Therefore, for example, in the process of assembling the apparatus according to the present invention, the operation of accommodating the signal cable constituting the electrical connection path between the control system unit and the head unit described above becomes easy.

  According to the display device of the present invention, in addition to the above configuration, the upper end portion of the single columnar body is connected to the lower portion of the head unit, and the lower end portion of the single columnar body is connected to the upper portion of the control system unit. By being connected, the control system unit preferably supports the head unit via a single columnar body.

  As a result, the head unit is firmly supported with respect to the control system unit by a single columnar body that is not divided for each layer, so that inertial force due to external vibration, drop impact, etc. is applied to the head unit. Since the pendulum phenomenon is reduced, the displacement of the electrical connection path between the head unit and the control system unit can be reduced.

  According to the display device of the present invention, in addition to the above-described configuration, the head unit has a wireless data communication function with an external device, and is accommodated in the communication portion of the single columnar body with the control system unit. It is preferable to perform data communication via a signal cable for data communication.

  As a result, it is not necessary to go through a circuit board divided for each layer as a signal transmission path for data communication, and it can be accommodated in a communication portion of a single columnar body and arranged in the shortest straight line. Stable wireless data communication can be realized without being affected by the displacement of the light source group or the circuit board caused by vibration or a drop impact.

  According to the display device of the present invention, in addition to the above configuration, the head unit preferably has a pair of movable parts that can tilt in a horizontal direction orthogonal to the axial direction.

  This makes it possible to use the balance principle and to prevent the head unit from swinging due to externally applied vibration.

  For example, when the pair of movable parts are tilted in a direction perpendicular to the axial direction (vertical direction) and opposite to each other, the swinging can be prevented more remarkably.

  According to the display device of the present invention, in addition to the above configuration, at least one of the pair of movable parts preferably includes an antenna having a wireless data communication function with an external device.

  Thus, even if the head unit is configured with a metal casing that inhibits radio wave propagation, not only wireless data communication with an external device can be realized, but also the communication distance can be extended.

  According to the display device of the present invention, in addition to the above-described configuration, the single columnar body is made of a conductive metal material having elasticity, and is electrically connected to the ground terminal of the control system unit. preferable.

  Thereby, even if the displacement of the light source group or the circuit board caused by the vibration applied from the outside or the impact of the drop acts on the single columnar body, the displacement stress is absorbed by the elastic deformation and the local stress concentration can be suppressed.

  In addition, the so-called shielding effect that the influence of radio noise entering from the outside to the signal transmitted between the head unit and the control system unit is reduced can be effectively obtained, and a stable pulse signal with little distortion can be transmitted. .

  That is, a signal transmission path for data communication can be secured in a stable state.

  According to the display device of the present invention, in addition to the above-described configuration, in the control system unit, the operation panel unit and the indicator are within an outer peripheral range that falls within a central angle of 180 ° centered on one of the directions in which the pair of movable parts tilt. It is preferable to arrange the parts.

  This makes it easy for the operator to visually check the indicator part within the same field of view while adjusting the tilting state (tilting angle) of the movable part, and in addition, setting of various switches arranged in the operation panel part In addition, connecting an external device such as a personal computer to the configuration setting pin jack facilitates UP / DOWN loading of firmware.

  According to the display device of the present invention, it is possible to ensure the strength and weight of the entire display system unit against bending in all directions orthogonal to the axial direction, and at the shortest time between the control system unit and the head unit via the communication portion. An electrical connection between them can be secured.

1 is an overall perspective view of a display device according to Embodiment 1 of the present invention. The simplified sectional view seen from the back side of the Y direction of the display device in Embodiment 1 of the present invention The block diagram which shows the mutual relationship of the control system unit, the display system unit, and the head unit in Embodiment 1 of this invention 1 is an exploded perspective view of a control system unit and a part of a display system unit of a display device according to Embodiment 1 of the present invention. 1 is an exploded perspective view of a part of a display system unit and a head unit of a display device according to Embodiment 1 of the present invention. (A) Internal perspective view showing a state in which a signal cable is accommodated in a communication part of a single columnar body, (b) Internal side view showing a state in which a signal cable is accommodated in a communication part of a single columnar body (A) The figure which shows the accommodation state of the signal cable in case the orthogonal cross-sectional shape of a columnar body is U-shape, (b) The accommodation state of the signal cable in the case where the orthogonal cross-sectional shape of a columnar body is U-shape is shown. (C) The figure which shows the accommodation state of the signal cable in case the orthogonal cross-sectional shape of a columnar body is donut shape (a columnar body is a cylindrical pipe shape). Comparison of ray tracing, luminance image, and luminance distribution in three modes with different reflecting member shapes The block diagram which shows the relationship between the display apparatus in Embodiment 1 of this invention, and an external apparatus. (A) The figure which showed the conventional whole structure schematically with a partial cross section, (b) The figure which showed the structure of a part of light emission part adjacent to the upper and lower sides with a partial cross section.

  Hereinafter, in order to describe an embodiment of the present invention, it will be described with reference to the drawings.

(Embodiment 1)
1 is an overall perspective view of the display device according to the first embodiment of the present invention, and FIG. 2 is a simplified cross-sectional view of the display device according to the first embodiment of the present invention as viewed from the rear side in the Y direction. FIG. 4 is a block diagram showing the mutual relationship among the control system unit, the display system unit, and the head unit according to the first embodiment of the present invention. FIG. 4 shows the control system unit and display of the display device according to the first embodiment of the present invention. 5 is an exploded perspective view of a part of the system unit, FIG. 5 is an exploded perspective view of a part of the display system unit and the head unit of the display device according to Embodiment 1 of the present invention, and FIG. FIG. 6B is an internal side view showing a state where the signal cable is accommodated in the communication portion of the columnar body, and FIG. 6B is an internal side view showing a state where the signal cable is accommodated in the communication portion of the single columnar body. Fig. 7 (a) shows that the cross-sectional shape of the columnar body is U-shaped. FIG. 7B is a diagram showing the signal cable housing state when the orthogonal cross-sectional shape of the columnar body is U-shaped, and FIG. Fig. 8 is a diagram showing a signal cable housing state when the orthogonal cross-sectional shape of the columnar body is a donut shape (the columnar body is a cylindrical pipe shape), and Fig. 8 shows three types of ray tracing and luminance in which the shape of the reflecting member is changed. FIG. 9 is a block diagram showing the relationship between the display device and the external device in the first embodiment of the present invention.

  First, the display device 10 in FIG. 1 has a so-called tower shape as a whole, and includes a control system unit 11 positioned below and a head unit 12 positioned above, and an intermediate portion (slightly below the head). And a display system unit 13 that is narrowly mounted.

  Here, in order to facilitate the following description, the width direction of the display device 10 is the X direction, the depth direction is the Y direction, the axial direction that is also the height direction is the Z direction, and the X direction, the Y direction, and the Z direction are: It is defined as directions orthogonal to each other.

  First, in the display system unit 13 located in the middle part, the clear globes 13a to 13d are stacked in four stages so as to be disassembled in the vertical direction on the drawing (coincident with the Z-axis direction, hereinafter referred to as the axial direction). Constitutes the outer periphery of each stage (each layer) of the display system unit.

  The globes 13a to 13d are all the same shape and have a substantially cylindrical hollow cylindrical shape.

  Each globe has a concave and convex surface formed along the inner circumferential direction on the inner surface, thereby diffusing the transmitted light in a direction perpendicular to the axial direction from the center toward the circumference, and the outer surface. Has an uneven surface along the axial direction, and has a lens function for diffusing transmitted light in the axial direction.

  Furthermore, a hollow cylindrical glove extending in the axial direction as a whole is configured by stacking them in a four-stage axial direction with a seal member (see FIG. 5) interposed therebetween.

  As will be described in detail later, as the four light source groups 13e to 13h (see FIG. 2) built in the globes 13a to 13d of each layer, a plurality of LEDs that emit red, yellow, and green light from the upper level to the lower level. (Six) are mounted in an annular shape, and the lowermost layer includes a mixture of LEDs emitting blue light and LEDs emitting white light.

  As a result, the four light source groups 13e to 13h are stacked so as to be separated from each other along the axial direction, and are covered with the globe composed of the four globes 13a to 13d described above.

  On the other hand, a head unit 12 having a wireless data communication function with an external device is disposed adjacently above the display system unit 13 in the axial direction.

  The head unit 12 has a pair of movable portions 12a on the side of the head that can tilt in a horizontal direction (Y direction) whose rotation center axis is parallel to the X axis and orthogonal to the axial direction.

  Furthermore, an antenna having a wireless data communication function with an external device (not shown) is built in at least one of the movable parts 12a.

  On the other hand, a control system unit 11 that performs light emission control of the four light source groups 13e to 13h is disposed adjacent to the lower side of the globe 13d located in the lowermost layer of the display system unit 13.

  In addition, an opening 11a in which a plurality of long holes are arranged along the outer peripheral surface is provided on the front side (the front side in the Y direction) of the control system unit 11 in order to pass a predetermined buzzer sound to the front side. It has been.

  Below the opening 11a, an indicator 11b for displaying the power-on state (power display) of the apparatus, wired access, wired link, wireless access, and wireless link is arranged. The outer surface of the control system unit 11 expands in a streamline direction toward the direction and is connected to a cylindrical bottom portion 11c (see FIG. 4) having the maximum outer diameter.

  Further, the cylindrical bottom portion 11c is covered from the outer peripheral side by a sealing member 11n made of silicon rubber having waterproofness and buffering properties.

  And the enlarged diameter part and the front side of the lower part are partially flattened to constitute the operation panel part 11d.

  In the operation panel, slide the upper slide hook upward to release the locked state of the front cover, open the front hinge with the lower hinge as a fulcrum, and install various switches (not shown). Setting is possible.

  Further, if an external device such as a personal computer is connected to a configuration setting pin jack (not shown), firmware can be UP / DOWN loaded.

  Further, in the control system unit 11, the operation panel unit 11 d and the indicator unit 11 b are within an outer peripheral range that falls within a central angle of 180 ° with the forward direction in the tilting direction (Y direction) of the movable unit 12 a of the head unit 12 described later as the center. Is arranged.

  As a result, the operator can easily see the access and link states within the same field of view by adjusting the tilting state (tilting angle) of the movable portion 12a and the light emission state of the indicator portion 11b.

  Similarly, operations such as UP / DOWN loading of firmware can be facilitated by connecting an external device such as a personal computer to various switch settings and configuration setting pin jacks arranged in the operation panel 11d.

  The control system unit 11 converts an AC voltage or a DC voltage supplied from an external power line (not shown) through a power connector into a predetermined DC voltage that can drive each circuit board. PS substrate 11f that supplies voltage to the substrate of the stage, IF substrate 11e that performs lighting control of each layer of the display system unit 13 according to the input signal of the external device via the signal input / output connector, and connection via the wired input connector I / O processing with a network cable corresponding to the Ethernet (registered trademark, the same applies hereinafter), I / O processing with the wireless LAN board 11g, further, light emission processing of the indicator unit 11b and buzzer device 11o (see FIG. 4) A CPU board 11h for performing ON / OFF processing or the like is mounted (see FIG. 3).

  As described above, by arranging the control system unit 11 containing many components below, it is necessary to provide a mounting mechanism necessary for mounting this device on an external device or to connect to an external device. It becomes easy to insert various network cables such as a power line and Ethernet from the lower side and perform wiring via the connector, and a low center of gravity can be achieved at the same time.

  Next, with reference to FIG. 2 and FIG.

  First, the four layers (four steps) of the globes 13a to 13d extending in the axial direction are located on the outer peripheral portion of the display system unit 13, and the hollow 13i has a light source group composed of an assembly of a plurality of LEDs for each layer. 13e to 13h are stacked and separated from each other along the axial direction, and are covered with globes 13a to 13d corresponding to the LED aggregates for each layer.

  On the other hand, the light source groups 13e to 13h for each layer are viewed from the bottom side of the circuit boards 13j to 13m electrically connected to the IF board 11e built in the control system unit 11 (from the bottom to the top). 6) A single columnar body 13n indicated by a broken line is mounted so as to surround the ring, and is composed of an assembly of 6 chip-type LEDs in the case of a single color and 12 chips in the case of 2 colors. Has been.

  Further, from the upper stage to the lower stage, the reflecting members 13p to 13s (in FIG. 2, only the uppermost reflecting member 13p is shown, and the reflecting members 13q to 13s are omitted. FIG. 4 shows an exploded perspective view of all the reflecting members 13p to 13s. A) is provided.

  These reflecting members 13p to 13s reflect light emitted from the light source groups 13e to 13h downward along the axial direction in a direction perpendicular to the axial direction from the center toward the circumference.

  Here, as the reflecting members 13p to 13s, for example, a methacrylic resin or polycarbonate resin having a mirror-smoothness and a metal material such as aluminum or silver deposited thereon, and a bright nickel-chrome plating is applied to the aluminum surface. What improved the reflectance, such as what rubbed (aluminum mirror) and the surface of the steel plate which carried out the bright nickel-chromium plating or the bright nickel-gold plating, is preferable.

  Further, the outer peripheral surfaces of the reflecting members 13p to 13s are three-step inclined surfaces (S1 from the top) having a predetermined inclination angle (flare angle) with respect to the central optical axis (parallel to the axial direction) of the LED indicated by a one-dot chain line. , S2, S3) and connecting curved surfaces (P1, P2 from above) connecting them (see the uppermost stage in FIG. 8).

  Here, each of the inclined surfaces (S1, S2, S3) has an inclination angle (flare angle) ranging from 30 ° to 60 ° with respect to the central optical axis of the LED parallel to the axial direction indicated by the alternate long and short dash line. ).

  In addition, it is preferable to set the inclination angle on the outer peripheral side larger than the inclination angle on the inner peripheral side close to each of the light source groups 13e to 13h, and 30 ° <the inclination angle θS1 of the inclined surface S1 <the inclination angle θS2 of the inclined surface S2. The inclination angle S3 of the inclined surface S3 is set so as to satisfy the relationship of <60 °.

  Accordingly, the viewing angle in the vertical direction of the light reflected on the respective inclined surfaces (S1, S2, S3) and passing through the globes 13a to 13d and radiated to the outside does not increase more than necessary, and is within an appropriate viewing angle. The effect that it fits in is exhibited.

  Further, the two connection curved surfaces (P1, P2) are configured such that the radius r1 of the connection curved surface P1 on the inner peripheral side is a mounting radius r of a plurality of LEDs (hereinafter, a virtual circle passing through 6 to 12 LEDs mounted in a ring shape). The radius r2 of the connection curved surface P2 on the outer peripheral side is set larger than the mounting radius r.

  That is, the radius r1 of the connecting curved surface P1 on the inner peripheral side and the radius r2 of the connecting curved surface P2 on the outer peripheral side satisfy the relationship r1 <r <r2.

  In this way, by setting the LED mounting radius r so as to overlap with the radius range where the second (middle) inclined surface S2 is located among all three inclined surfaces, the second (middle) The inclined surface S2 is located on the central optical axis with the largest light quantity.

  By such a device, the brightness of light directed toward the outer circumference after reflection is not greatly biased in the vertical direction, and good uniformity is ensured within an effective viewing angle.

  In addition, if there are a plurality of virtual circles of LEDs mounted in a ring shape and they are concentric circles, the average value of the mounting radii r of the LEDs only needs to satisfy the above range.

  In addition, the shape when any or all of the three-step inclined surfaces (S1, S2, S3) described above are cut by a plane parallel to the axial direction may be a substantially arc shape, It may be convex toward the inner periphery.

  The inclination angle (flare angle) at that time is a straight virtual side face that short-circuits the minimum radius part on the inner peripheral side and the maximum radius part on the outer peripheral side, and corresponds to the inclination angle of the virtual side face. And

  Further, the reflecting members 13p to 13s are combined so that a pair of members divided into two on an axial plane (XZ plane) passing through the single columnar body 13n sandwiches the single columnar body 13n. As an umbrella shape (see the uppermost stage in FIGS. 4 and 8).

  As a result, most of the light emitted from the LED is reflected in a direction perpendicular to the axial direction and from the center toward the circumference, so that reflection and diffusion of light in an unnecessary direction such as an axial direction or an inward direction is prevented. The amount of light transmitted through the globes 13a to 13d and radiated to the outside of the apparatus can be further increased.

  That is, it is possible to effectively improve the sensitivity (discriminability) to the operator for the luminescent color to be displayed.

  Further, as described above, the control system unit 11 converts the AC voltage or DC voltage supplied from the external power supply line through the lower power connector into a predetermined DC voltage that can drive each circuit board. A PS substrate 11f for supplying voltage is mounted on the next-stage substrate.

  Similarly, the light source of the display system unit 13 is based on a predetermined lighting control program of the CPU board 11h in accordance with an input signal (open collector input or PNP / NPN type input) of the external device via the lower signal input / output connector. An IF board 11e that performs switch-like lighting control such as lighting, extinguishing, and blinking of the groups 13e to 13h is mounted.

  Furthermore, input / output processing with a network cable compatible with Ethernet or the like connected via a lower wired input connector, input / output processing with the wireless LAN board 11g, further light emission processing of the indicator unit 11b and buzzer BZ (buzzer device) CPU board 11h that performs ON / OFF processing etc. is mounted on the upper part of 11o, and wireless LAN board 11g connected to a signal cable such as a coaxial cable is also mounted on the upper part, and these are connected via a connector. ing.

  On the other hand, a single columnar body 13n having a communication portion (see FIGS. 4, 6, and 7) is disposed inside the globes 13a to 13d, and the communication portion is a display system unit along the axial direction. The internal space 11y of the control system unit 11 and the internal space 12y of the head unit 12 communicate with each other.

  As will be described in detail later, the upper end portion of the single columnar body 13n is coupled to the lower portion of the head unit 12, and the lower end portion of the single columnar body 13n is coupled to the upper portion of the control system unit 11. Thus, the control system unit 11 supports the head unit 12 via the single columnar body 13n.

  Further, the intermediate portion of the signal cable indicated by a broken line as the signal transmission path for the data communication described above is accommodated in the communication portion of the single columnar body 13n, and the upper end portion of the signal cable is built in the movable portion 12a. Connected to the antenna, the lower end of the signal cable is connected to the top of the wireless LAN board 11g.

  Thereby, since the signal cable can be accommodated in the communication portion of the single columnar body 13n and can be arranged linearly in the shortest time, there is no need to route (detour) the circuit boards 13j to 13m arranged for each layer. .

  In addition, stable wireless data communication can be realized without being affected by the displacement of the light source groups 13e to 13h and the circuit boards 13j to 13m caused by vibrations applied from the outside or impacts of dropping.

  In addition, the single columnar body 13n is preferably a hot rolled mild steel plate, for example, as an electrically conductive metal material having elasticity, but may also be a cold rolled mild steel plate, stainless steel, aluminum, aluminum alloy, copper alloy, etc. I do not care.

  As a result, even if the displacement of the light source groups 13e to 13h and the circuit boards 13j to 13m caused by the vibration applied from the outside or the impact of the drop acts on the single columnar body 13n, the displacement stress is absorbed by the elastic deformation and the local stress is obtained. Concentration can be suppressed.

  The single columnar body 13n is preferably electrically connected to the ground terminal (frame ground) of the control system unit 11 via the main frame 11j (see FIG. 4) or a conducting wire.

  As a result, the so-called shielding effect that the influence of radio noise entering from the outside to the signal transmitted between the head unit 12 and the control system unit 11 is reduced can be effectively obtained, and a stable pulse signal with less distortion. Can be transmitted.

  Next, the internal configuration will be described in more detail with reference to FIG.

  The resin-made front case 11i that constitutes the front side of the control system unit 11 (the front side in the Y direction) is provided with the aforementioned opening 11a, indicator 11b, and operation panel 11d.

  Further, a main frame 11j made of a metal material such as a hot rolled mild steel plate, a cold rolled mild steel plate, stainless steel, aluminum, an aluminum alloy, or a copper alloy is disposed inside the front case 11i.

  The main frame 11j has an annular portion at the bottom, L-shaped bent portions on the left and right as viewed from the Y direction, and a through hole is formed in each.

  Also, a bottom cover 11k is disposed directly above the annular portion at the bottom of the main frame 11j, and the CPU substrate 11h, IF substrate 11e, and PS substrate 11f described above are mounted in parallel to each other and in parallel to the axial direction. Is placed.

  On the other hand, the buzzer device 11o incorporates a buzzer BZ in the upper part and a member constituting a resonance space in the lower part, and the opening part on the front side (Y direction side) is arranged to face the opening part 11a of the front case 11i. Four screw fastenings are made.

  The above-described constituent members are assembled so that the silicon rubber sealing member is interposed between the front case 11i and the rear case (not shown) so as to be sandwiched from the front and rear, and the pair of mount plates 11m are interposed inside. Then, it is fixed to the lower part of the cylindrical bottom portion 11c by four screws from below.

  Thereafter, the cylindrical bottom portion 11c is covered from the outer peripheral side by a sealing member 11n made of silicon rubber having waterproofness and buffering properties.

  On the other hand, the lower end portion of the single columnar body 13n having the communication portion (L-shaped left and right bent portions when viewed from the X direction) is placed on the bent portion forming the upper portion of the main frame 11j. The two bolts inserted through the through-holes from above are fixed by fastening nuts (not shown) from below.

  Further, the single columnar body 13n having the communication portion is disposed inside the globes 13a to 13d as the assembled state, and the communication portion of the single columnar body 13n is connected to the internal space 11y of the control system unit 11. Since the internal space 12y of the head unit 12 communicates with the head unit 12, a signal cable (see FIG. 5) such as a coaxial cable is accommodated in the communicating portion, so that an electrical connection can be made with the shortest path.

  Here, since the single columnar body 13n is single, weight reduction can be realized while ensuring the strength of the display system unit 13 against bending in all directions.

  Further, after the signal cable is once accommodated in the communication portion in which the front side in the X direction of the single columnar body 13n is opened, it has a buffering property, an insulating property, a heat resistance property, or the like as necessary. However, the rectangular pipe member 13t may be inserted from above to cover the side of the single columnar body 13n.

  Thereby, for example, the interaction (physical interference) between the single columnar body 13n and the circuit boards 13j to 13m can be further reduced.

  Then, after covering the pipe member 13t, the center holder 13u whose center is opened in a rectangular shape is fitted into the outside of the pipe member 13t, and thereafter, the constituent members of the display system unit 13 to be described later are assembled.

  Further, on the right side of FIG. 4, a perspective view in which the reflecting members 13p to 13s are each divided into two parts from the upper stage to the lower stage is shown.

  Here, as described above, each of the reflection members 13p to 13s is composed of a pair of members divided into two by a plane (XZ plane) parallel to the axial direction passing through the single columnar body 13n. After being combined so as to sandwich the columnar body 13n, it has an umbrella-like form as a whole.

  Thus, the circuit board which drives the light source groups 13e-13h (refer FIG. 2), for example in the assembly process of the display system unit 13, by comprising the reflective members 13p-13s by a pair of members divided into two. After the single columnar body 13n is inserted in advance through the central rectangular openings 13j to 13m, the circuit boards 13j to 13m adjacent to each other can be easily connected with a flat cable or the like (FIG. 6A). )reference).

  Then, it is combined with the circuit boards 13j to 13m via the upper and lower hooks provided on each of the pair of divided members of the reflecting members 13p to 13s.

  For example, for the reflecting member 13q, the circuit board 13l is held in a groove formed on the inner surfaces of the pair of members, each lower hook is fitted into the hook hole of the circuit board 13l from above, and each upper hook is By fitting into the hook hole of the circuit board 13k from below, the circuit board 13k and the circuit board 13l are regulated at predetermined positions according to the height dimension of the reflecting member 13q, and they are firmly coupled. The

  Thereby, since the flat cable is located inside the pair of reflecting members 13p to 13s divided into two, the reflected light is radiated to the outside more uniformly in all directions without blocking the light emitted from the LED. It has the effect of being able to.

  In addition, with such a simple configuration, there is no need to provide fixing means such as bolts and nuts as separate members when assembling the pair of two divided members into an umbrella-like form, so disassembly and assembly are extremely It becomes easy.

  Furthermore, the design change is made such that the total length of the single columnar body 13n is appropriately changed from a single layer of one lamp to a multilayer of five or more lamps including four layers of gloves 13a to 13d (see FIG. 5) according to the present embodiment. It can easily cope with various specification changes.

  Next, with reference to FIG. 5, the structure of a part of the globes 13a to 13d and the head unit 12 constituting the display system unit 13 will be described.

  As described above, the globes 13a to 13d constitute a hollow cylindrical globe that extends in the axial direction as a whole by overlapping four stages (four layers) with a seal member interposed therebetween in the axial direction.

  In addition, a sealing member is also interposed in the upper part of the uppermost globe 13a, and a lower unit 12b of the head unit 12 is interposed.

  Further, after the disk member 12c is placed inside the lower unit 12b, a bolt (see FIG. 4) is inserted into the through hole at the center from below, and the washer is sandwiched and screwed into the nut.

  Here, the bolt is previously inserted from below into the central through hole of the upper end portion (L-shaped bent portion when viewed from the Y direction) of the single columnar body 13n.

  Accordingly, the upper end portion of the single columnar body 13n is connected to the lower portion of the head unit 12, and the lower end portion of the single columnar body 13n is connected to the main frame 11j constituting the control system unit 11 as described above. It becomes the structure connected with the upper part.

  Thereby, the head unit 12 is supported by the control system unit 11 via the single columnar body 13n.

  As a result, the head unit 12 is firmly supported with respect to the control system unit 11 by the single columnar body 13n that is not divided for each layer, so that the inertial force due to externally applied vibration, drop impact, etc. Since the pendulum phenomenon is reduced even if it is added to 12, the displacement relative to the electrical connection path (for example, a signal cable such as a coaxial cable) between the head unit 12 and the control system unit 11 can be reduced.

  The upper unit 12d is mounted on the upper side of the lower unit 12b, and then the upper unit 12d is attached. The pair of movable parts 12a is disposed in the recesses on the side of the head in the horizontal direction (Y direction). ) Can be tilted.

  Further, a signal cable such as a coaxial cable is hooked at a predetermined fixed place inside the control system unit 11 by two insulators inserted downward.

  Next, with reference to FIG. 6A and FIG. 6B, a state in which the signal cable is accommodated in the communication portion of the single columnar body 13n will be described.

  Here, the single columnar body 13n having an U-shaped orthogonal cross-section has a communication portion opened along the axial direction on the near side in the X direction, and a state in which a communication cable is wound around the communication portion. In addition, a pipe member 13t having a rectangular cross section inserted from above and having a rectangular cross section is covered over the entire periphery.

  For example, if a coaxial cable is used as the signal cable as shown in this figure, the upper coaxial connector is connected to an antenna (not shown) built in the left movable portion 12a, and the lower coaxial connector is connected. Is connected to the connector arranged on the wireless LAN board 11g of the control system unit 11 described above.

  The antenna is thus connected to the wireless LAN board 11g via the signal cable, so that it has a wireless data communication function with an external device (not shown), and the movable portion 12a is appropriately placed horizontally or directly below from above. Since tilting is possible in a range (a range having a rotation center axis parallel to the X axis and along the YZ plane), the tilt angle can be adjusted according to the transmission / reception state.

  As a result, even if the upper unit 12d of the head unit 12 is configured with a metal casing that does not easily reach radio waves, not only can wireless data communication with an external device be realized, but also the communication distance can be easily set. Can also be extended.

  Next, with reference to FIGS. 7A to 7C, the positional relationship among the single columnar body 13n, the communication portion, and the signal cable will be described using orthogonal sectional views.

  As shown in FIG. 7A, it is preferable that the single columnar body 13n has a U-shaped orthogonal cross section by a plane (XY plane) orthogonal to the axial direction.

  According to the present embodiment, the flat plate member made of the above-described metal material is pressed in the X direction, and is formed into a U shape with the communicating portion opened upward.

  In this case, the space surrounded by the inner peripheral surface of the single columnar body 13n and the virtual plane (YZ plane) passing through the broken lines L1-L2 connecting both ends (a, b) along the axial direction is in communication. Part.

  As a modification, FIG. 7B shows a case where the single columnar body 33n has a U shape as an orthogonal cross-sectional shape by a plane (XY plane) orthogonal to the axial direction.

  In this case, similarly, a space surrounded by the inner peripheral surface and a virtual plane (YZ plane) passing through broken lines L3-L4 connecting both ends (c, d) along the axial direction constitutes a communication portion. ing.

  Furthermore, as another modification, FIG. 7C shows a single columnar body 43n having a donut shape (columnar body is cylindrical pipe shape) as an orthogonal cross-sectional shape by a plane (XY plane) orthogonal to the axial direction. The case is shown.

  As is clear from FIGS. 7A to 7C, the cross-sectional area perpendicular to the axial direction of the communication portion of the single columnar bodies 13n, 33n, 43n is data between the control system unit 11 and the head unit 12. It is preferable that the cross-sectional area of the signal cable for communication is larger.

  As a result, the signal cable is narrowly mounted by the inner surfaces (inner walls) of the single columnar bodies 13n, 33n, and 43n that surround the outer periphery of the communication portion, and is not compressed. Even if the single columnar bodies 13n, 33n, 43n are greatly deformed by impact, the resistance due to disconnection or poor conduction is not easily affected by the deformation of the signal cable itself due to the interstitial gap resulting from the difference in the cross-sectional area. Factors that impair signal transmission, such as an increase in value, can be eliminated.

  Further, in any case, the case where, for example, a coaxial cable is used as the signal cable has been described. However, a twisted pair cable, a flat cable, or the like may be appropriately employed.

  In addition to accommodating only the signal cable described above, it is possible to mount another antenna having a different frequency band in addition to the head unit 12, for example, and the signal cable to be connected to the communication unit can be combined with the communication unit. It may be accommodated, or a lead wire for supplying a DC voltage for driving each LED assembly between the circuit boards 13j to 13m may be accommodated.

  Next, referring to FIG. 8, one or two steps, which are typical known techniques, are used for ray tracing, luminance image, and luminance distribution when three steps of inclined surfaces are formed on the outer peripheral surfaces of the reflecting members 13p to 13s. This will be described in comparison with the case where the inclined surface is formed.

  As the evaluation conditions, the shape of only the reflecting member is changed and compared, and the other parameters are the same (for example, the inner surface of the globe has an uneven surface with a uniform pitch along the inner circumferential direction, and the outer surface has a shaft. And a concavo-convex surface formed at a uniform pitch along the direction).

  Here, the straight line in the ray tracing shows a representative line representing the light emitted from the LED based on the Monte Carlo method, and reflects the locus of reflection and refraction of the light emitted from the LED. The distribution shows the luminance distribution on the globe surface by plotting the vertical position on the horizontal axis and the luminance on the vertical axis.

  The luminance image represents the luminance distribution as a plot on a two-dimensional plane so that it can be grasped in the positional relationship with the globe surface.

  As can be seen from this comparative view, when a one-step inclined surface is formed on the reflecting member, effective luminance can be obtained only in a narrow range from -4 mm to +13 mm, and lower luminance can be avoided. Absent.

  In addition, when a two-step inclined surface is formed on the reflecting member, a luminance distribution is recognized in a range from −10 mm to +13 mm, but a decrease in luminance at the center is inevitable and the uniformity is insufficient.

  As a cause, the connecting curved surface connecting the two-step inclined surfaces is a position substantially coincident with the central optical axis of the LED, and in this case, the portion where the central luminance is reduced is the connecting curved surface connecting the two-step inclined surfaces. Corresponds to the opposite portion, it is assumed that the light on the central optical axis is not effectively reflected in the direction of the outer peripheral side.

  On the other hand, when the three-step inclined surface is formed on the reflecting member as in the present embodiment, the discontinuity is recognized by the lens effect of the globe, but it is almost uniform over a range from about −10 mm to +13 mm. A luminance distribution is obtained.

  Next, the relationship between the present apparatus and an external apparatus when used in the infrastructure mode will be described with reference to FIG.

  Each of the two different external devices shown in the figure is equipped with a display device according to the present invention having a wireless communication function positioned as a slave station, each of which is a device for starting, operating, stopping, abnormal or malfunctioning of each external device The status is basically displayed.

  On the other hand, all of them are also connected to a remote IO (remote input / output device) via a network cable such as Ethernet. Data can be transmitted to the display device according to the present invention positioned as a master station side by communication.

  Similarly, the received data can be transferred to a higher-level PLC (Programmable Logic Controller), DCS (Distributed Control System) or the like via a network cable such as Ethernet.

  The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. The technical scope disclosed in different embodiments, respectively. Modifications of the embodiment obtained by appropriately combining the means are also included in the technical scope of the present invention.

  For example, the display system unit has been described for five colors and four lamps (four layers). However, the display system unit may be a single layer (one lamp) to three layers, or five layers (five lamps) or more. One columnar body should just be arrange | positioned inside the globe (it is not limited to a center position).

  Moreover, although the case where two or more light source groups adjacent to each other among a plurality of light source groups are covered with a glove that can be separated for each layer has been described, the entire layer is covered with a single glove that cannot be separated. It is good also as a structure covered partially over two layers or more.

  For example, if the light emission colors of the LEDs of each light source groove are different from each other, they can be covered with a clear single glove that is not colored, so a boundary part such as a seal member between the layers of the glove becomes unnecessary, and the number of parts Can be greatly reduced.

  In addition, since the glove is single over a plurality of layers, the hollow sealing property can be further improved.

  Further, the gloves of each layer may be colored instead of being clear.

  Further, the orthogonal cross-sectional shape orthogonal to the axial direction of the single columnar body is preferably a U-shape or U-shape, but may be an arc shape, an M-shape, or any other shape. Any shape may be used as long as a communication portion that is a space surrounded by a surface and a virtual plane connecting both ends along the axial direction can be secured.

  The open side of the single columnar body (the side where the communicating portion is opened along the axial direction) may be covered with another member, or may be left open outward.

  Further, if the single columnar body is a pipe shape, the shape is not limited to the cylindrical shape as described above, and the orthogonal cross-sectional shape may be a rectangle, an ellipse or other shapes.

  In addition, the cross-sectional shape orthogonal to the axial direction of the globe may be any shape other than a donut shape whose inner and outer surfaces are concentric, for example, a flat shape, a rectangular shape, a race track shape, etc. Good.

  Moreover, while the upper end part of a single columnar body is connected with the lower part of a head unit, the lower end part of a single columnar body should just be connected with the upper part of a control system unit, and those connection methods are as follows. Is not limited to the fixing in which the bolt is screwed to the nut, and various known or commonly used techniques relating to joining such as caulking, adhesion, welding, welding, etc. may be used as appropriate.

  Furthermore, the control system unit may be designed to perform lighting control of the light source group of the display system unit based on data received from an external device via the head unit.

  This makes it possible to stably control various lighting controls including lighting, extinguishing, and blinking of each light source group according to various states such as startup, operation, standby, and abnormality, even with external devices that are spaced apart. Since it is realizable, the operator can grasp | ascertain the apparatus state easily.

  As described above, the display device according to the present invention communicates as a slave station in addition to the basic display function of displaying the device status such as startup, operation, stop, abnormality or failure of the connected external device, for example. With the function, the status information of the external device described above, the measured value information obtained via the remote input / output device or the data information from the personal computer is transmitted to the master station such as PLC or DCS via a wired network, It has a communication function as a master station, and is useful as a display device that receives data information transmitted from a slave station using wireless communication and transfers it to a PLC or DCS.

DESCRIPTION OF SYMBOLS 10 Display apparatus 11 Control system unit 11a Opening part 11b Indicator part 11c Cylindrical bottom part 11d Operation panel part 11e IF board 11f PS board 11g Wireless LAN board 11h CPU board 11i Front case 11j Main frame 11k Bottom cover 11m Mount plate 11n Seal member 11o Buzzer device 11y Internal space 12 of control system unit Head unit 12a Movable part 12b Lower unit 12c Disk member 12d Upper unit 12y Internal space of head unit 13 Display system units 13a, 13b, 13c, 13d Globe 13e, 13f, 13g, 13h Group 13i Hollow 13j, 13k, 13l, 13m Circuit boards 13n, 33n, 43n Single columnar bodies 13p, 13q, 13r, 13s Reflective member 13t Pipe member 13u Center holder S1, S2, S3 Inclined surface P1, P2 Connection curved surface θS1 Inclination angle θS2 of inclination surface S1 Inclination angle θS3 of inclination surface S2 Inclination angle r of inclined surface S3 Radius r2 of connection curved surface P1 Radius BZ of connecting curved surface P2 Buzzer

Claims (9)

A display system unit having a hollow cylindrical globe extending in the axial direction and a light source group positioned inward of the glove, and the light source group of the display system unit disposed on one side in the axial direction of the display system unit. A display device including a control system unit that performs light emission control,
A head unit is disposed on the other side in the axial direction of the display system unit, and a single columnar body having a communication portion is disposed inside the globe, and the communication portion of the single columnar body is A display device characterized in that the internal space of the control system unit communicates with the internal space of the head unit.   The display system unit includes the hollow cylindrical globe and a plurality of the light source groups that are covered with the globe and stacked apart from each other along the axial direction, and the control system unit includes the display The light emission control of the light source group of each layer of the system unit is performed, and the communication portion of the single columnar body extends across each layer of the display system unit along the axial direction. The display device described in 1.   The single columnar body is made of a conductive metal material having elasticity, and has a shape in which an orthogonal cross-sectional shape by a plane orthogonal to the axial direction is a U-shape or a U-shape, and its inner periphery 3. The display device according to claim 1, wherein a space surrounded by a side surface and a virtual plane connecting both ends along the axial direction constitutes the communication portion.   An upper end portion of the single columnar body is connected to a lower portion of the head unit, and a lower end portion of the single columnar body is connected to an upper portion of the control system unit, thereby the control system unit. The display device according to claim 1, wherein the head unit is supported via the single columnar body.   The head unit has a wireless data communication function with an external device, and is connected to the control system unit via a signal cable for data communication accommodated in the communication portion of the single columnar body. Data display is performed, The display apparatus of any one of Claim 1 to 4 characterized by the above-mentioned.   The display device according to claim 5, wherein the head unit includes a pair of movable parts that can tilt in a horizontal direction orthogonal to the axial direction.   The display device according to claim 6, wherein at least one of the pair of movable portions includes an antenna having a wireless data communication function with the external device.   The single columnar body is made of a conductive metal material having elasticity, and is electrically connected to a ground terminal of the control system unit. The display device described in 1.   7. The control system unit, wherein the operation panel unit and the indicator unit are arranged in an outer peripheral range that falls within a central angle of 180 [deg.] With one of the directions in which the pair of movable units tilt as a center. The display device described in 1.

Images