JP2007317572A - Indicating light - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indicating light capable of preventing a pair of terminals from being inserted one side at a time in mounting a light source unit to an appliance body. <P>SOLUTION: The appliance body 1 has support parts 24 each used as a support of rotation of a vessel body 9 around one straight line along a direction in which a pair of terminals 14 are arranged when the terminals 14 are inserted into a connector 15 by bringing the upper ends on the back surfaces of the vessel bodies 9 into contact with opening edges of the front surface. The light source unit 4 is provided with a restricting projection 23 composed of a projecting piece 23a projecting rearward from the back surface of the vessel body 9, and an extended piece 23b extended upward from a tip of the projecting piece 23a. The restricting projection 23 prohibits the insertion of the terminal 14 into the connector 15 by coming into contact with a restricting piece 22 formed on the appliance body 1 when the rotation of the vessel body 9 using the support part 24 as the support is not caused in mounting the light source unit 4 to the appliance body 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an indicator lamp in which a light source unit having a light source is detachably attached to a fixture body having a lighting device.

  In recent years, as an indicator lamp mainly used for a guide light that informs the location of a blame of a building, as shown in FIG. 5A, a front opening that houses a lighting device 5 that turns on a light source 3 (see FIG. 6). The rectangular main body 1, the rectangular display panel 6, and a rectangular light guide plate 7 that is disposed on the back side of the display panel 6 and guides light incident from one end face to the display panel 6 (see FIG. 6). ) Having a display unit 2 attached to the front surface of the instrument body 1 and a container 9 holding a light source 3 disposed opposite to the one end face of the light guide plate 7. The thing provided with the light source unit 4 attached to the front surface of the instrument main body 1 so that attachment or detachment is possible is provided. As shown in FIG. 6, since the light from the light source 3 incident on the light guide plate 7 is emitted forward from substantially the entire front surface of the light guide plate 7, the display lamp A illuminates the entire surface of the display panel 6 evenly. Can do.

By the way, the light source unit 4 has a pair of flat terminal 14 which protruded back from the back surface of the container body 9 as shown in FIG. The pair of terminals 14 are arranged in opposite directions at both ends in the direction along the one end surface of the light guide plate 7 in the back surface of the container body 9. These terminals 14 are connected to the light source 3, and are inserted into the pair of connectors 15 provided in the fixture body 1 and connected to the lighting device 5 from the front, whereby the light source 3 and the lighting device 5 are connected via the connector 15. And electrically connect. In order to ensure electrical connection between the flat terminal 14 and the connector 15, the connector 15 has a structure in which the terminal 14 is sandwiched in the thickness direction, and the connector 15 has little play in the thickness direction of the terminal 14. . Here, the light source unit 4 is attached to the instrument main body 1 from the front of the instrument main body 1, and is removed from the instrument main body 1 to the front when the light source 3 is replaced (for example, refer to Patent Document 1).
JP 2002-23671 (page 5-8, FIG. 1)

  Although the indicator lamp A described in Patent Document 1 has a structure in which the light source unit 4 is attached to the instrument body 1 from the front, a pair of terminals 14 are inserted one by one when the light source unit 4 is attached. There is. In this case, the following problems occur.

  That is, in the state of FIG. 8 in which only one terminal 14 is inserted into the connector 15, the terminal 14 to be inserted later is inserted obliquely from the front with respect to the connector 15, so that it is inserted later. Terminal insertion is difficult to connect. Thus, if it is difficult to insert and connect the terminal 14, the terminal 14 is not completely inserted into the connector 15, and the indicator lamp A is used in an unstable electrical connection between the light source 3 and the lighting device 5. There is a possibility of being.

  This invention is made | formed in view of the said reason, Comprising: When attaching a light source unit to an instrument main body, it aims at providing the indicator lamp from which a pair of terminal is not inserted one by one.

  According to the first aspect of the present invention, there is provided a display unit having a plate-shaped display panel and a light guide plate that is disposed on the back side of the display panel and guides light incident from one end surface to the display panel, and a lighting device that lights the light source A box-shaped instrument body having a front opening and a light source that is disposed opposite to the one end face of the light guide plate and that is formed in a rectangular parallelepiped shape that is long in the longitudinal direction of the one end face of the light guide plate. A light source unit provided with a pair of flat-plate terminals arranged opposite to each other at both ends in the longitudinal direction of the back surface of the vessel body, the light source unit being connected to the connector provided on the instrument body By attaching and connecting a pair of terminals, the display unit and the instrument body are detachably attached to the instrument body so as to cover the front surface of the instrument body. When the terminal is inserted into the connector by contacting one end part farther away from the connector, the terminal has a fulcrum part that serves as a fulcrum for rotating the instrument around a straight line along the direction in which the pair of terminals are aligned. Is formed of a protruding piece that protrudes from the back surface of the container along the protruding direction of the terminal, and an extended piece that extends from the tip of the protruding piece to the guide protrusion side along the width direction of the back surface of the container. The instrument main body is provided with a regulation piece arranged between the back surface of the instrument body and the extension piece in a state in which the instrument body is attached.

  According to this configuration, the device body is provided with the restriction protrusion, and the device body is provided with the restriction piece. Therefore, when the light source unit is attached to the device body, the device body is rotated with the fulcrum portion as a fulcrum. If not accompanied, the extension piece of the restricting projection comes into contact with the restricting piece, thereby prohibiting the insertion of the terminal into the connector. Therefore, when the light source unit is attached to the instrument body, the pair of terminals are inserted into the connector as the vessel rotates with the fulcrum portion as a fulcrum. Here, since the fulcrum part becomes a fulcrum of rotation of the instrument around a straight line along the direction in which the pair of terminals are arranged, when the pair of terminals is inserted into the connector along with the rotation of the instrument with the fulcrum part as a fulcrum, The pair of terminals are inserted into the connector at the same time. As a result, the pair of terminals are not inserted one by one.

  According to a second aspect of the present invention, in the first aspect of the present invention, the restricting protrusion is formed on the restricting piece by bringing the extending piece into contact with the restricting piece in a state where the light source unit is attached to the instrument body. It is characterized by engaging.

  According to this configuration, the restricting protrusion engages with the restricting piece in a state where the light source unit is attached to the instrument main body. Therefore, when the light source unit is removed from the instrument main body, the instrument body rotates with the fulcrum as a fulcrum. If it does not exist, it will be prohibited that the terminal comes out of the connector by engaging the restricting projection with the restricting piece. Therefore, when removing the light source unit from the instrument body, the pair of terminals are pulled out of the connector as the vessel rotates with the fulcrum portion as a fulcrum. Here, since the fulcrum part becomes a fulcrum of rotation of the instrument around a straight line along the direction in which the pair of terminals are arranged, when the pair of terminals is removed from the connector along with the rotation of the instrument with the fulcrum part as a fulcrum, The pair of terminals are pulled out from the connector at the same time, and the pair of terminals are never pulled out one by one. As a result, it is possible to avoid the problem that the external force applied to the light source unit to remove the light source unit concentrates on the terminal in a state where only one terminal is inserted into the connector.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the protruding dimension of the terminal is such that when the light source unit is attached to the instrument body, the light source unit takes out light from the light source. The terminal is set such that the terminal starts to contact the connector in a state where the one end face of the light guide plate is not opposed to each other.

  According to this configuration, when the light source unit is attached to the fixture body, the light from the light source does not enter the light guide plate and the display panel does not shine when the terminal starts to contact the connector. Therefore, if the light source unit is not completely attached, the display panel does not shine and the light source unit is not attached completely, indicating that the light source unit is not completely attached. There is an advantage that the user of the lamp can be informed, and the use of the indicator lamp can be avoided when the light source unit is not completely installed.

  In the present invention, since the device body is provided with the restriction protrusion and the device body is provided with the restriction piece, when the light source unit is attached to the device body, the device body must be rotated about the fulcrum portion. For example, when the extending piece of the restricting protrusion comes into contact with the restricting piece, the insertion of the terminal into the connector is prohibited. Therefore, when the light source unit is attached to the instrument body, the pair of terminals are inserted into the connector as the vessel rotates with the fulcrum portion as a fulcrum. Here, since the fulcrum part becomes a fulcrum of rotation of the instrument around a straight line along the direction in which the pair of terminals are arranged, when the pair of terminals is inserted into the connector along with the rotation of the instrument with the fulcrum part as a fulcrum, The pair of terminals are inserted into the connector at the same time. As a result, there is an advantage that the pair of terminals are not inserted one by one.

  In the following embodiment, the indicator lamp used for the guide light that informs the location of the blame of the building is illustrated, but the indicator lamp of the present invention is not limited to the guide lamp, and changes the design of the display panel. Can be used for various purposes.

  The indicator lamp A according to the present embodiment has a rectangular parallelepiped instrument main body 1 having a front opening, a display unit 2 attached to the front of the instrument main body 1, and a light source 3, as in the conventional configuration of FIG. The light source unit 4 attached to the front surface of the instrument main body 1 with the display unit 2 is provided. The instrument main body 1 houses a lighting device 5 for lighting the light source 3. In the present embodiment, as shown in FIG. 1, two display units 2 and two light source units 4 are provided, and the display unit 2 and the light source unit 4 are also attached to the back side of the instrument body 1. Since the same configuration is adopted on the front side and the back side of the instrument body 1, the display unit 2 and the light source unit 4 attached to the front side of the instrument body 1 will be described below.

  As shown in FIG. 1, the display unit 2 is arranged on a rectangular display panel 6 on which a design for guiding to a blame is written on a translucent acrylic plate, and on the back side of the display panel 6. The light guide plate 7 has a rectangular light guide plate 7 that guides light incident from the upper end surface to the display panel 6. The light guide plate 7 is attached to the instrument main body 1 in a direction facing the instrument main body 1. Here, a frame body 8 that covers the peripheral surface excluding the upper end surfaces of the display panel 6 and the light guide plate 7 is attached to the display panel 6 and the light guide plate 7 so that light does not leak from other than the front surface of the display panel 6. .

  The light source unit 4 has a container 9 that is formed in a rectangular parallelepiped shape that is long in the longitudinal direction of the upper end surface of the light guide plate 7 (hereinafter referred to as the left-right direction) and holds the light source 3 at a position facing the upper end edge of the light guide plate 7. Then, it is attached to the instrument main body 1 so as to cover the front surface of the instrument main body 1 together with the display unit 2. Here, a straight-tube cold cathode fluorescent lamp that is long in the longitudinal direction of the upper end surface of the light guide plate 7 is used as the light source 3 of the light source unit 4, and the lower surface is opened around the light source 3 to guide light from the light source 3. A reflecting plate 10 that controls light distribution toward the upper end surface of the light plate 7 is disposed.

  A plate-like mounting bracket 11 is disposed on the lower surface of the upper wall of the instrument body 1. Two through holes 12 (see FIG. 5A) penetrating the mounting bracket 11 and the upper wall of the instrument main body 1 are formed, and the instrument main body 1 is screwed into these through holes 12 (see FIG. 5). (Not shown) is attached to the ceiling B. A storage battery 13 (see FIG. 5 (a)) for supplying power to the lighting device 5 at the time of a power failure of the commercial power source is provided in the appliance main body 1. The lighting device 5 normally turns on the light source 3 using the commercial power source as a power source. At the time of a power failure of the commercial power source, the power source is switched from the commercial power source to the storage battery 13 to light the light source 3.

  The lighting device 5 in the instrument body 1 and the light source 3 of the light source unit 4 are connected by the following configuration. That is, the difference between the center part of the back surface of the container 9 of the light source unit 4 in the vertical direction and the left and right ends connected to the electrodes (not shown) provided at the both ends of the light source 3, respectively. A pair of plug-in terminals 14 are provided so as to protrude rearward, and the pair of terminals 14 is inserted into and connected to a pair of connectors 15 provided on the instrument body 1 and connected to the lighting device 5. The device 5 and the light source 3 are connected.

  Each of the pair of terminals 14 is formed in a flat plate shape, and is arranged in the direction in which the thickness direction thereof coincides with the left-right direction so as to face each other in the left-right direction. Each connector 15 is opened forward, and the terminal 14 of the light source unit 4 is inserted into the connector 15 from the front. Here, in the insertion hole 16 (see FIG. 5B) into which the terminal 14 is inserted in the connector 15, the dimension in the thickness direction (left-right direction) of the terminal 14 is substantially the same as the thickness dimension of the terminal 14. The dimension in the width direction (vertical direction) of the terminal 14 is larger than the width dimension of the terminal 14.

  In order to ensure electrical connection between the flat terminal 14 and the connector 15, the connector 15 includes a blade receiving member (not shown) made of a metal plate in the insertion hole 16. The terminal 14 is clamped in the thickness direction. This blade receiving member has a main plate arranged along the left and right side surfaces of the insertion hole 16, and is formed in a shape in which upper and lower ends of the main plate are folded back to one side in the thickness direction of the main plate, The terminal 14 inserted into the insertion hole 16 is inserted between the main plate of the blade receiving member and the folded portion. Thereby, although the terminal 14 is inserted into the connector 15, the movement in the left-right direction is prohibited, but the terminal 14 is slightly movable in the up-down direction.

  Further, on the inner side surface of the front end portion of each of the left and right side walls of the instrument body 1, a cross section orthogonal to the left and right direction is a vertical piece extending in the vertical direction and a horizontal piece extending rearward from the lower end portion of the vertical piece. A pair of locking pieces 17 (see FIG. 5A) formed in an L-shape project in pairs so as to line up in the vertical direction. On the other hand, each portion corresponding to the locking piece 17 on the back surface of the display unit 2 has a cross section perpendicular to the vertical direction with a main piece protruding rearward and a claw piece extending outward from the tip of the main piece. Engagement pieces 18 (see FIG. 5A) each having a L-shape project from each other.

  Below, the procedure which attaches the display unit 2 and the light source unit 4 with respect to the instrument main body 1 is demonstrated.

  The position of the display unit 2 is adjusted so that the instrument body 1 and the display unit 2 are aligned in the left-right direction, and the engagement pieces 18 of the display unit 2 corresponding to the locking pieces 17 of the instrument body 1 are shifted upward. When the display unit 2 is slid downward while the lower surface is shifted upward from the lower surface of the instrument body 1 and the back surface of the display unit 2 is in contact with the instrument body 1, the claw pieces of the engagement pieces 18 are moved. The engagement piece 18 is engaged with the engagement piece 17 in contact with the back surface of the vertical piece and the upper surface of the horizontal piece of the engagement piece 17, and the display unit 2 is attached to the instrument body 1. In this state, the movement of the display unit 2 in the left-right direction, the lower direction, and the front-rear direction with respect to the instrument body 1 is restricted.

  Thus, in a state where only the display unit 2 is attached to the instrument main body 1, a gap having a slightly smaller vertical width than the light source unit 4 is formed above the display unit 2 on the front surface of the instrument main body 1. A recess 19 (see FIG. 5B) into which the upper end of the display unit 2 is inserted is formed in the lower part of the light source unit 4, and the light source unit 4 is arranged on the front surface of the instrument body 1 so as to fill the gap. Removably attached to.

  In the indicator lamp A of the present embodiment, the container 9 of the light source unit 4 includes a pair of guide protrusions 20 protruding rearward from the upper ends of the left and right ends as shown in FIG. 2, and FIG. When the guide projections 20 are inserted into the instrument main body 1 as shown in FIG. 2, the guide projections 20 come into contact with the left and right side walls of the instrument main body 1 to restrict the movement in the left-right direction. When the guide protrusion 20 contacts the lower surface of the wall and the bottom surface of the recess 19 contacts the upper surface of the display unit 2, the movement in the vertical direction is restricted. The body 9 is in contact with the corner portion of the guide projection 20 in a state where the upper surface of the guide projection 20 is in contact with the corner portion between the front surface and the lower surface of the upper wall of the opening periphery of the instrument body 1. It is attached to the instrument body 1 as shown in FIG. Here, the corner portion between the front surface and the lower surface of the upper wall of the instrument body 1 functions as a fulcrum portion 24 that serves as a fulcrum for rotation of the vessel body 9.

  That is, in the light source unit 4, one end portion (upper end portion) far from the display unit 2 in the width direction of the back surface of the body 9 is brought into contact with the fulcrum portion 24 (corner portion) of the instrument body 1, and the fulcrum portion 24 is The instrument body 9 is attached to the instrument body 1 by rotating the instrument body 9 in a direction to bring the lower part of the instrument body 9 closer to the instrument body 1 around a straight line along the direction in which the pair of terminals 14 are arranged as a fulcrum. As described above, when the light source unit 4 is attached to the instrument main body 1 by rotating the container body 9 with the fulcrum portion 24 of the instrument main body 1 as a fulcrum, the pair of terminals 14 of the light source unit 4 are accompanied by the rotation of the instrument body 9. At the same time, it is inserted into the connector 15.

  Further, when removing the light source unit 4 from the instrument body 1, if a force as indicated by an arrow X in FIG. 9 is applied to the light source unit 4 and the pair of terminals 14 are pulled out one by one, only one terminal 14 is connected to the connector. Since the external force applied to the light source unit 4 in order to remove the light source unit 4 in the state of FIG. 8 inserted into 15 is concentrated on the one terminal 14, a large force is applied to the one terminal 14. May cause the terminal 14 to be deformed. If the terminal 14 is deformed, when the light source unit 4 is attached again, there is a problem that it becomes difficult to insert and connect the terminal 14 to the connector 15.

  On the other hand, in this embodiment, in a state where the light source unit 4 is attached to the instrument body 1, the container body 9 is rotated in the direction opposite to that at the time of attachment with the contact portion of the guide projection 20 with the fulcrum part 24 as a fulcrum. Then, the light source unit 4 can be removed from the instrument body 1. Thus, if the light source unit 4 is removed from the instrument body 1 by rotating the container body 9 with the fulcrum part 24 of the instrument body 1 as a fulcrum, the pair of terminals 14 of the light source unit 4 are simultaneously rotated with the rotation of the container body 9. The connector 15 is pulled out.

  A removal groove 21 into which a part of a coin can be inserted is recessed in the rear end edge that contacts the front end edge of the instrument body 1 on both the left and right side surfaces of the container body 9. With the light source unit 4 attached to the instrument main body 1, if a part of a coin is inserted into the removal groove 21 and a force is applied in the direction in which the instrument body 9 is separated from the instrument main body 1, it is easy. Since a gap can be formed between the instrument body 1 and the light source unit 4, the light source unit 4 can be easily removed by inserting a finger or the like into the gap and rotating the body 9.

  By the way, both front and rear end portions of the mounting bracket 11 provided on the lower surface of the upper wall of the instrument body 1 are bent downward as regulating pieces 22. And in the container 9 of the light source unit 4, the restriction projections 23 that abut against the restriction pieces 22 along the protruding direction of the terminals 14, as shown in FIG. They are provided so as to protrude from the positions closer to each other. The restricting projection 23 includes a protruding piece 23a that protrudes rearward from the back surface of the container body 9, and an extending piece 23b that extends upward from the tip of the protruding piece 23a along the back surface of the container body 9. The positional relationship with the regulating piece 22 is set so that the regulating piece 22 is disposed between the back surface of the vessel body 9 and the extending piece 23b in a state where the vessel body 9 is attached to the instrument body 1. .

  Here, the light source unit 4 is attached to the instrument main body 1 in such a manner that a gap formed above the display unit 2 is filled on the front surface of the instrument main body 1 after the display unit 2 is attached to the instrument main body 1. Therefore, when attached to the instrument main body 1, the guide projection 20 is inserted into the instrument main body 1 as described above, thereby restricting the movement of the body 9 in the vertical and horizontal directions. Therefore, when the terminal 14 is inserted into the connector 15, the extension piece 23 b comes into contact with the restriction piece 22 unless the container body 9 rotates with the fulcrum portion 24 of the instrument body 1 as a fulcrum. The insertion of the terminal 14 into is prohibited. For example, when the light source unit 4 is moved straight in the front-rear direction with respect to the instrument body 1 and is about to be attached, the back surface of the extension piece 23b comes into contact with the front surface of the restriction piece 22 as shown in FIG. 14 insertion is prohibited.

  That is, when the light source unit 4 is attached to the instrument body 1 by providing the restriction protrusions 23 and the restriction pieces 22, the back surface of the container body 9 is necessarily inclined obliquely downward as shown in FIG. Then, after the guide projection 20 is brought into contact with the fulcrum part 24 of the instrument body 1, the container body 9 is rotated with the fulcrum part 24 as a fulcrum, so that the pair of terminals 14 are simultaneously rotated with the rotation of the container body 9. Accordingly, there is an advantage that the pair of terminals 14 is not inserted one by one as in the conventional configuration.

  Further, the restricting protrusion 23 is set to a dimension such that the extending piece 23b is caught by the restricting piece 22 as shown in FIG. 1B in a state where the light source unit 4 is attached to the instrument main body 1. That is, when the light source unit 4 is attached to the instrument main body 1, the extension piece 23 b gets over the regulation piece 22 as the container body 9 rotates, and the extension piece 23 is attached in the state where the light source unit 4 is attached to the instrument main body 1. When the front surface of 23 b comes into contact with the back surface of the restriction piece 22, the restriction protrusion 23 is engaged with the restriction piece 22.

  Here, since the light source unit 4 is removed from the instrument main body 1 with the display unit 2 attached to the instrument main body 1, the guide protrusion 20 is formed as described above when the light source unit 4 is removed from the instrument main body 1. By being inserted into the instrument main body 1, the movement of the container body 9 in the vertical and horizontal directions is restricted. Therefore, when the terminal 14 is withdrawn from the connector 15, if the device body 9 is not rotated about the fulcrum portion 24 of the instrument body 1, the restricting protrusion 23 is engaged with the restricting piece 22 from the connector 15. The terminal 14 is prohibited from coming off. For example, when the light source unit 4 moves straight forward and backward with respect to the instrument body 1 and is about to be removed, the extension piece 23b comes into contact with the restriction piece 22 as shown in FIG. Is prohibited from coming off.

  That is, by providing the restriction protrusion 23 and the restriction piece 22, when removing the light source unit 4 from the instrument main body 1, the container body 9 inevitably has the fulcrum part 24 as a fulcrum as shown in FIG. Since the pair of terminals 14 are rotated, the pair of terminals 14 are simultaneously removed from the connector 15 as the container body 9 is rotated. Therefore, there is an advantage that the pair of terminals 14 is not pulled out one by one. At the same time, the extended piece 23b functions as a stopper for the terminal 14 by engaging with the restricting piece 22, and the terminal 14 will not come out of the connector 15 unless the container body 9 is rotated as described above. Absent.

  Further, here, the base end of the projecting piece 23a is arranged so that the locus of the distal end portion of the extending piece 23b does not overlap the restricting piece 22 when the light source unit 4 is attached and detached while rotating the vessel 9 with the fulcrum part 24 as a fulcrum. In order to increase the projecting dimension of the extending piece 23b from the projecting piece 23a on the distal end side of the projecting piece 23a, while setting the projecting dimension of the extending piece 23b from the projecting piece 23a on the side small, 23b is formed in a shape in which the tip surface (upper surface) is inclined so that the protruding dimension from the protruding piece 23a increases toward the tip side of the protruding piece 23a. That is, according to this shape, in the case where the body 9 is rotated with the fulcrum part 24 as a fulcrum by setting the projecting dimension of the extending piece 23b on the base end side of the projecting piece 23a to be small. While the light source unit 4 can be attached and detached without bringing the extending piece 23b into contact with the regulating piece 22, the fulcrum portion 24 can be supported by setting the protruding dimension of the extending piece 23b on the distal end side of the protruding piece 23a to be large. When the container body 9 is not rotated, the back surface of the extending piece 23b can be brought into contact with the front surface of the restricting piece 22 to reliably prevent the terminal from being inserted into the connector 15.

  Moreover, in the indicator lamp A of this embodiment, when the light source unit 4 is attached to the fixture main body 1, the protrusion dimension of the terminal 14 is the light from the light source 3 in the light source unit 4 as shown in FIG. It is set so that the terminal 14 starts to contact the connector 15 in a state where the surface to be taken out (the lower surface of the container body 9) and the upper end surface of the light guide plate 7 are not opposed to each other. Thereby, when attaching the light source unit 4 to the instrument main body 1, the light from the light source 3 does not enter the light guide plate 7 in a state where the container 9 is rotated and the terminal 14 starts to contact the connector 15. Therefore, the display panel 6 does not shine. As a result, if the light source unit 4 is not completely attached, an indication that the light source unit 4 is not completely attached is displayed to an operator who performs the attaching operation of the light source unit 4 or a user of the indicator lamp A. There is an advantage that it is possible to notify that the panel 6 does not shine, and it is possible to avoid using the indicator lamp A when the light source unit 4 is not completely installed.

  In the present embodiment, the connector 15 to which the light source unit 4 attached to the front side of the instrument body 1 is connected and the connector 15 to which the light source unit 4 attached to the back side of the instrument body 1 is connected are integrally configured. However, these connectors 15 may be provided separately. Further, the present invention may be applied to the indicator lamp A in which the display unit 2 and the light source unit 4 are attached only to the front side of the fixture body 1.

The structure of embodiment of this invention is shown, (a) is a side view of the principal part in the middle of attachment of a light source unit, (b) It is a side view of the principal part in the state which attached the light source unit. It is a perspective view of a light source unit same as the above. It is a side view of the principal part of the state which is going to attach the light source unit to the instrument main body same as the above by the incorrect attachment method. It is a side view of the principal part of the state which is going to attach the light source unit with the correct attachment method with respect to the instrument main body same as the above. (A) is a disassembled perspective view which shows the structure of a conventional structure, (b) is a disassembled perspective view which shows the principal part of (a). It is a side view same as the above. It is a top view same as the above. It is a top view which shows the other state same as the above. It is a perspective view same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instrument main body 2 Display unit 3 Light source 4 Light source unit 5 Lighting device 6 Display panel 7 Light guide plate 9 Body 14 Terminal 15 Connector 22 Restriction piece 23 Restriction protrusion 24 Support part 23a Projection piece 23b Extension piece

Claims (3)

  A box with a front opening that houses a plate-shaped display panel and a display unit that is disposed on the back side of the display panel and has a light guide plate that guides light incident from one end surface to the display panel, and a lighting device that turns on the light source And a device body that holds a light source opposed to the one end surface of the light guide plate and is formed in a rectangular parallelepiped shape that is long in the longitudinal direction of the one end surface of the light guide plate. A light source unit provided with a pair of flat-plate terminals arranged so as to face each other at both ends in the direction, and the light source unit inserts and connects the pair of terminals to the connector provided on the instrument body Is attached to the instrument body so as to cover the front surface of the instrument body together with the display unit, and the instrument body is attached to the opening periphery of the front surface at one end portion of the body farther from the display unit in the width direction of the rear surface. When the terminal is inserted into the connector by touching, it has a fulcrum part that serves as a fulcrum of rotation around the straight line along the direction in which the pair of terminals are aligned. There is provided a regulating projection formed by a projecting piece projecting along the projecting direction of the terminal and an extending piece extending from the tip end portion of the projecting piece to the guide projecting side along the width direction of the back surface of the body. The indicator lamp is characterized in that the appliance main body is provided with a regulating piece arranged between the back surface of the vessel body and the extending piece in a state where the vessel body is attached.   2. The display according to claim 1, wherein the restricting protrusion is engaged with the restricting piece by bringing the extending piece into contact with the restricting piece in a state where the light source unit is attached to the instrument body. light. The protruding dimension of the terminal is such that when the light source unit is attached to the instrument body, the surface from which the light from the light source is extracted and the one end surface of the light guide plate are not opposed to each other in the light source unit. The indicator lamp according to claim 1 or 2, wherein a terminal is set so as to start contact with the connector.

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