JP4858780B2 - Display device - Google Patents

Description

  The present invention relates to a display device that displays various information through a display panel including a flat display such as a liquid crystal display panel.

As this type of display device, for example, a device described in Patent Document 1 below is known. This display device has a circuit board having a connector (insertion connection part) and a terminal part (connection member) made up of a card edge type connector (a circuit board having a conduction pattern) inserted and connected to the connector. A display panel composed of a liquid crystal display panel (liquid crystal cell) that displays predetermined information based on signal input through the terminal portion, and a cell case (first case) that holds the display panel with at least the connector side of the terminal portion exposed. Body) and a main case (second case body) for attaching and fixing the cell case. The cell case holding the display panel is assembled and fixed to the main case, and at the same time, the terminal portion is inserted and connected to the connector. It is like that.
Also, in this type of display device, as described in Patent Document 2 below, for example, the terminal portion of the display panel is formed from a plurality of lead terminals (connection members), and each of these lead terminals is a circuit. Some of them are electrically connected by being inserted into a plurality of insertion contact portions of a connector (insertion connection portion) provided on the substrate.
Japanese Patent Laid-Open No. 08-129165 (FIG. 1) JP 09-061800 (FIG. 8)

However, the display device described in Patent Document 1 has an advantage in that it is not necessary to perform a dedicated connection work when electrically connecting the terminal portion to the circuit board, but the cell case can be assembled to the main case. In terms of assembly workability, it is difficult to assemble the cell case because the insertion and connection of the terminal part to the connector is not made, and the mutual position between the terminal part and the connector may shift during assembly. Improvement was desired.
In particular, as in the display device described in Patent Document 2, in the type in which a plurality of lead terminals are inserted into the respective insertion contact portions of the connector, it is difficult to align the terminal portion and the connector. Has the disadvantage that it requires skilled workers.

  The present invention has been made in view of this point, and its main object is to provide a display device capable of improving the connection and assembly workability of the display panel.

In order to achieve the above object, the present invention has a circuit board having an insertion connection portion and a plurality of connection members inserted and connected to the insertion connection portion, and displays predetermined information based on signal input through the connection member. A display panel, a first case body that holds the display panel in a state where at least the insertion connection portion side of the connection member is exposed, and a second case body that attaches and fixes the first case body A display device in which the connection member is inserted and connected to the insertion connection portion by assembling and fixing the first case body to the second case body. The first case body and the second case Guide means for guiding the first case body to the second case body when the first case body is assembled and fixed to the second case body to each of the bodies, and the guide means as a reference Serial and positioning means for positioning the connecting member into the insertion connection portion with the first case member to position the second case body, the provided, said positioning means of said first case member and said connecting member First positioning means for positioning first, and second positioning means for positioning the first case body and the connection member next to the first positioning means, and by the first positioning means During positioning of the first case body and the connection member, the first case body and the connection member are not positioned by the second positioning, and the first case body and the connection member are not positioned by the second positioning means. The positioning of the first case body and the connecting member by the first positioning means is not performed when the connecting member is positioned.

  In the present invention, the guide means may be a single and columnar first guide portion provided on one of the first case body or the second case body along the insertion connection direction of the connection member, A single and cylindrical second guide part that is provided on the other side of the first case body or the second case body along the first guide part and guides and inserts the first guide part. It is characterized by becoming.

  Further, the present invention provides a shape in which the first and second guide portions are capable of restricting movement of the first case body in the rotation direction with reference to the guide means before positioning by the positioning means. Or it has a control means which controls the movement to the rotation direction on the basis of the guide means of the 1st case body, It is characterized by the above-mentioned.

  In the invention, it is preferable that the positioning means positions the first case body in a rotation direction with reference to the guide means.

  In the invention, the positioning means is located around the guide means and formed in one of the first and second cases, and the contact part or the fitting part and the first and second cases. It consists of a to-be-contacted part or a to-be-fitted part formed in the other of these.

  According to the present invention, it is possible to provide a display device that can achieve the initial object and can improve the connection and assembly workability of the display panel.

  FIG. 1 to FIG. 13 show a case where the display device according to the present invention is applied to, for example, an automotive instrument device as one embodiment of the present invention. FIG. 1 is a front view of the instrument device, and FIG. FIG. 3 is an exploded perspective view of the main part of the holding member and the frame member, FIG. 4 is a front view of the main part of the frame member, FIG. 5 is a front view of the holding member, and FIG. 6 is a rear view of the holding member. 7 is a front view of the holding member when viewed from the direction of the arrow Y in FIG. 3, FIG. 8 is a sectional view taken along the line BB in FIG. 5, FIG. 9 is a sectional view taken along the line CC in FIG. FIG. 10 illustrates the assembly of the holding member to the frame member. FIG. 10 is an exploded cross-sectional view when the leading end of the guided portion of the holding member is inserted into the entrance portion of the guide portion of the frame member. FIG. 12 is an exploded sectional view showing a positioning state by the positioning means of FIG. Exploded cross-sectional view showing a state, FIG 13 is a cross-sectional view after completion of assembly. 3, 5, and 6 show a state in which a cover member and a display panel described later are removed.

  1 and 2, the instrument device includes a back cover 1, a circuit board 2, a frame member (second case body) 3, a pointer-type display unit 4 disposed on the circuit board 2, and a circuit. The display unit 5 disposed on the substrate 2, the pointer type instrument 4, a decorative frame 6 that covers a required portion of the display unit 5, and the pointer type instrument 4 and the display unit 5 provided on the decorative frame 6 are seen through. A see-through cover 7 is provided to cover it.

  The back cover 1 is made of a synthetic resin and covers the back side of the circuit board 2.

  The circuit board 2 is made of a hard circuit board having a circuit pattern (not shown), and light sources 21, 22, and 23 that illuminate the pointer-type meter 4 and the display unit 5 on the side opposite to the side covered with the back cover 1, respectively. A connector (insertion connecting portion) 24 is mounted.

Each of the light sources 21 to 23 is made of, for example, a light emitting diode, and the connector 24 has a plurality of insertion connection terminals (not shown) in a housing made of synthetic resin.
In the present embodiment, the connector 24 is applied as the insertion connection portion. However, any component or structure can be applied as long as a lead terminal (connection member) of the display panel 51 described later is inserted and connected. For example, the circuit board 2 It is also possible to provide a hole portion into which a lead terminal (connecting member) is inserted and soldered, and this hole portion may serve as an insertion connection portion.

  The frame member 3 is made of a synthetic resin material such as milky white, for example, and functions as a main frame and reflector of the entire instrument device, details of which will be described later.

  The pointer-type meter 4 has a main body portion disposed on the back side of the circuit board 2 and a pointer shaft that protrudes to the front side of the circuit board 2, and is connected to the pointer shaft of the stepping motor 41 to measure the amount. Accordingly, the pointer 42 is rotated around its axis, and the display plate 44 is provided with an indicator portion 43 to be indicated by the pointer 42. The pointer 42 is illuminated by the light source 21 and the display plate 44 is illuminated by the light source 22, respectively. The

  The display unit 5 includes a display panel 51, a light guide plate 52 that guides light behind the display panel, and a holding member (first case body) 53 that houses and holds the light guide plate 52 and the display panel 51. The cover member 54 is mounted on the holding member 53 and exposes a required portion of the display panel 51.

  The display panel 51 is composed of, for example, a liquid crystal display panel, and a plurality of lead terminals (connection members) 511 for supplying driving power to a plurality of electrodes arranged on one side thereof are connected and fixed in a row. The display panel 51 extends in the direction of the circuit board 2 that is 90 degrees different from the display panel 51, and each end thereof is inserted into the connector 24 and connected to the insertion connection terminal.

  The light guide plate 52 includes a portion extending along the display panel 51 and a portion extending from the portion to be bent toward the circuit board 2 so that an end thereof faces the light source 23, and the light from the light source 23 is displayed on the display panel 51. Guide and illuminate.

  The holding member 53 is made of, for example, milky white synthetic resin material and is attached to the frame member 3, and the detailed structure thereof will be described later.

  The decorative frame 6 is made of, for example, a black synthetic resin material, and the see-through cover 7 is made of a synthetic resin material having translucency.

  The display unit 5 is disposed in front of the pointer-type meter 4 so that the tip end side of the pointer 42 is exposed, and displays information such as a travel distance and an outside temperature on the display panel 51.

  Next, the detailed structure of the holding member 53 and the frame member 3 will be described.

  First, as shown in FIGS. 3 and 5 to 9, the holding member 53 accommodates a terminal support portion 531 that aligns the lead terminals 511 by inserting each lead terminal 511 and a light source 23 side portion of the light guide plate 52. Thus, the light introduction part 532 extending toward the circuit board 2 side, and the light introduction part 532 is a column-shaped object extending toward the circuit board 2 side (along a guide part to be described later) at a predetermined interval. A guide portion (first guide portion) 533, an abutting portion 534 formed using the outer wall portion of the light introducing portion 532 extending in the same direction as the guided portion 533, and the guided portion 533 in the same direction An insertion protrusion 535 formed using the extending protrusion, an elastic claw-shaped engagement part 536 formed using another protrusion extending in the same direction as the insertion protrusion 535, and the engagement part 536 Located around each said protrusion Further it has a receiving portion 537 which is formed by utilizing the other protrusion extending in the same direction as the.

  The guided portion 533 is combined with a later-described guide portion (second guide portion) of the frame member 3 to guide the holding member 53 to the frame member 3 when the holding member 53 is assembled and fixed to the frame member 3. When the observer views the display unit 5 from the normal reading direction, as shown in FIGS. 3 and 6, the display unit 5 (display panel 51) has a line-symmetric shape when viewed from the front. The extension axis AX2 that is located on the line symmetry axis AX1 and passes through the extension center of the guided portion 533 extends in a direction perpendicular to the line symmetry axis AX1.

  In addition, a plurality of (four in this example) rotation restricting ribs 538 are formed in the guided portion 533 at equal intervals (equal angles) with the extension axis AX2 as the center. In combination with the rotation restricting groove, the restricting means R (see FIG. 10) for restricting the movement of the holding member 53 in the rotation direction with reference to the guide means G is configured.

  Further, the inside of the guided portion 533 is formed in a hollow shape, and a screw to be described later is screwed into the hollow portion.

  The abutting portion 534 is combined with a later-described abutted portion of the frame member 3 so that the holding member 53 is first positioned on the frame member 3 with respect to the guide means G, and the lead terminal 511 is first attached to the connector 24. The first positioning means P1 (positioning means P) for positioning is configured (see FIG. 11).

  The insertion protrusion 535 is combined with a later-described inserted portion of the frame member 3 to position the holding member 53 on the frame member 3 next to the first positioning means P1 with respect to the guide means G, and the lead terminal 511. The connector 24 constitutes second positioning means P2 (positioning means P) for positioning next to the first positioning means P1 (see FIG. 12).

  The engaging portion 536 is formed by using another protruding portion extending in the same direction as the insertion protrusion 535, and engages with a later-described engaged portion of the frame member 3 to attach and fix the holding member 53 to the frame member 3. To do.

  The receiving portion 537 is formed by using still another protruding portion positioned around the engaging portion 536 and extending in the same direction as each protruding portion, and the holding member 53 is attached to the frame member 3 through the engaging portion 536. When the frame member 3 is fixed, the frame member 3 comes into contact with a wall surface of a mounting portion, which will be described later, and the mounting portion of the frame member 3 is positioned between the claws of the engaging portion 536 and the holding member 53 is fixedly fixed through the engaging portion 536. Is possible.

  Each of the contact portion 534, the insertion protrusion 535, the engagement portion 536, and the receiving portion 537 is formed in pairs so as to face each other with the line symmetry axis AX1 interposed therebetween. The protrusions 535, the engaging portions 536, and the receiving portions 537 are distributed around the guided portion 533 so that the distance from the guided portion 533 (extension axis AX2) is equal (see FIG. 6).

  As shown in FIGS. 3 and 4, the frame member 3 includes a reflecting portion 31 that reflects light from the light source 22, an opening portion 32 that exposes a predetermined area of the circuit board 2 including the connector 24, and the opening portion 32 and the reflecting portion. A mounting portion 33 having a bent cross section formed between the guide portion and a guide portion (second guide portion) 34 formed in a position corresponding to the guided portion 533 within the mounting portion 33. Attached part 35 formed in the position corresponding to the abutting part 534 in the portion 33 and the inserted part 36 also formed in the corresponding position of the insertion protrusion 535 in the mounting part 33 And an engaged portion 37 formed at a position corresponding to the engaging portion 536 in the portion 33. Note that the abutted portion 35 and the receiving portion 537 have two locations corresponding to the abutting portion 534, respectively, and the inserted portion 36 and the engaged portion 37 correspond to the insertion protrusion 535 and the engaging portion 536, respectively. The positions of the abutted part 35, the receiving part 537, the inserted part 36, and the engaged part 37 from the guide part 34 (extension axis AX2) formed in two or a pair in this way are set to be the same. ing.

  The guide portion 34 is formed of a cylindrical portion that extends along the extended axis AX2 along the guided portion 533 and can be inserted into the guided portion 533, and is combined with the guided portion 533 as described above to thereby hold the holding member. When assembling and fixing 53 to the frame member 3, a guide means G for guiding the holding member 53 to the frame member 3 along the extension axis AX2 which is the assembling direction is configured. Further, the guide portion 34 is formed with a rotation restricting groove 341 corresponding to the rotation restricting rib 538, and is combined with the rotation restricting groove 341 so that the rotation direction with reference to the guide means G of the holding member 53 as described above. The restricting means R for restricting the movement to is configured. At this time, the width of the rotation restricting groove 341 is formed to be slightly larger than the width of the rotation restricting rib 538, and as a result, as shown in FIG. The member 53 is slightly rotatable with respect to the extension axis AX2, and in this sense, the guide means G and the restricting means R determine the most position of the holding member 53 with respect to the frame member 3.

  The contacted portion 35 constitutes the first positioning means P1 (positioning means P) in combination with the contact portion 534 as described above. The guided portion 533 is guided from the state shown in FIG. When the insertion is further guided along the portion 34, as shown in FIG. 11, the abutment portion 534 first abuts, so that the holding member 53 is first attached to the frame member 3 with the guide means G as a reference. The lead terminal 511 is first positioned on the connector 24 while positioning. The first positioning means P1 performs positioning until positioning by the second positioning means P2.

  The inserted portion 36 constitutes the second positioning means P2 (positioning means P) by being combined with the insertion protrusion 535 as described above, but the state shown in FIG. 11 (first positioning means P1). When the guided portion 533 is further inserted and guided along the guide portion 34 from the positioning state of FIG. 12, the insertion protrusion 535 is inserted into the inserted portion 36 as shown in FIG. As a reference, the holding member 53 is positioned on the frame member 3 after the first positioning means P1, and the lead terminal 511 is positioned on the connector 24 while the lead terminal 511 is positioned on the connector 24 and next to the first positioning means P1. Inserted. The second positioning means P2 performs positioning until and after the mounting and fixing of the holding member 53 and the connection of the lead terminals 511 are completed.

  In the positioning state by the second positioning means P2, the contact portion 534 is inclined so as to gradually move away from the contacted portion 35 toward the display panel 51 so that the positioning by the first positioning portion P1 is not performed. In addition, a hole-shaped escape portion 38 that escapes the contact portion 534 is formed on the circuit board 2 side of the contacted portion 35, and the contact portion 534 is positioned by the second positioning means P <b> 2. A space is formed between the contact portion 35 and the contacted portion 35. The escape portion 38 may be an inclined surface that escapes the contact portion 534.

  When the guided portion 533 is further inserted and guided along the guide portion 34 from the state shown in FIG. 12, the engaging portion 536 penetrates the engaged portion 37 and is engaged as shown in FIG. The claw of the engaging portion 536 engages with the peripheral back surface of the portion 37, the receiving portion 537 abuts against the wall surface of the attaching portion 33, and the attaching portion 33 is sandwiched between the receiving portion 537 and the claw of the engaging portion 536, As a result, the holding member 53 is (temporarily) attached and fixed to the frame member 3 and the lead terminal 511 is inserted by a predetermined insertion amount of the connector 24, and the insertion connection of the lead terminal 511 to the connector 24 is completed.

  The main fixing of the holding member 53 is performed by screwing and fixing the guided portion 533 to the three parts of the back cover 1, the circuit board 2, and the frame member 3 through screws 8, as shown in FIG. 2.

  As described above, in the present embodiment, the circuit board 2 having the connector (insertion connecting portion) 24 and the plurality of lead terminals (connection members) 511 inserted and connected to the connector are provided through the lead terminals (connection members) 511. A display panel 51 for displaying predetermined information based on the received signal input, a holding member (first case body) 53 for holding the display panel 51 in a state where at least the connector 24 side of the lead terminal 511 is exposed, and the holding member In the display device in which the lead terminal 511 is inserted and connected to the connector 24 by assembling and fixing the holding member 53 to the frame member 3, the holding member 53 is provided. When the holding member 53 is assembled to the frame member 3 and fixed to each of the frame members 3, the holding member 53 is proposed to the frame member 3. Guide means G for positioning and positioning means P for positioning the holding member 53 on the frame member 3 and positioning the connector 24 on the lead terminal 511 with reference to the guide means G are provided. And the holding member 53 can be assembled to the frame member 3, and the positioning member P can be used to position the holding member 53 with respect to the frame member 3 and the lead terminal 511 with respect to the connector 24. As a result, the display panel can be connected. And assembly workability | operativity can be improved.

  In this embodiment, the positioning means P first positions the holding member 53 and the connector 24 first, and the second positioning means P positions the holding member 53 and the connector 24 next to the first positioning means P. Since the positioning means P can be divided by being configured with the positioning means P2, the positioning means P is prevented from becoming too long along the extension axis AX2, and the strength decreases as the positioning means P becomes longer, Accordingly, it is possible to prevent the positioning accuracy from being lowered. The number of positioning means P may be two or more.

  In the present embodiment, when the holding member 53 and the lead terminal 511 are positioned by the first positioning means P1, the positioning of the holding member 53 and the lead terminal 511 by the second positioning P2 is not performed, and the second positioning means P2 When the holding member 53 and the lead terminal 511 are positioned by the first positioning means P1, the holding member 53 and the lead terminal 511 are not positioned by the first positioning means P1, thereby simultaneously positioning the first and second positioning means P1 and P2. The difficulty in assembling due to (simultaneous contact) can be eliminated, and the assembling property can be improved.

  In this embodiment, the guide means G is a single and columnar guided portion 533 provided on the holding member 53 along the insertion / connection direction of the lead terminal 511, and the frame member 3 extends along the guided portion 533. By being provided with a single and cylindrical guide portion 34 that is provided and guides the guided portion 533, the guide means G is single, and assembly is performed under the guidance of the single guide means G. Therefore, the assembling property can be improved. The guide means G can also be configured by providing a guided portion on the frame member 3 and providing the guide portion 34 on the holding member 53.

  Further, in the present embodiment, the guided portion 533 and the guide portion 34 have the restricting means R for restricting the movement of the holding member 53 in the rotation direction with reference to the guide means G before the positioning means P is positioned. Thus, since the holding member 53 can be positioned in the rotation direction with reference to the extension axis AX2, the assembling property can be improved. It is desirable that the restricting means R has a slight margin (movable allowance) when positioning in the rotational direction, and that the positioning means P performs accurate positioning.

  Further, the restricting means R sets the guided portion 533 and the guide portion 34 to a non-rotatable shape such as a triangular, square, or D-shaped cross section, thereby rotating the holding member 53 in the rotation direction with reference to the guide means G. The movement may be restricted.

  Further, in the present embodiment, the positioning means P can position the holding member 53 in the rotation direction with reference to the guide means G, so that the positioning accuracy can be improved.

  Further, in the present embodiment, the positioning means P includes the abutting part 534 formed on the holding member 53 and the abutted part 35 formed on the frame member 3 so as to be positioned around the guide means G. Can be improved.

  The positioning means P can be configured in any way as long as the holding member 53 can be positioned on the frame member 3 and the connector 24 can be positioned on the lead terminal 511 with the guide means G as a reference. As described above, a fitting portion such as the insertion protrusion 535 provided on the holding member 53 and a fitting portion such as the insertion portion 36 provided on the frame member 3 may be used.

The front view of the instrument apparatus by the 1st Embodiment of this invention. AA sectional drawing of FIG. The principal part disassembled perspective view of the holding member and frame member in the embodiment. The principal part front view of the frame member in the embodiment. The front view of the holding member in the embodiment. The rear view of the holding member in the embodiment. The front view when the holding member in the embodiment is seen from the arrow Y direction in FIG. BB sectional drawing of FIG. CC sectional drawing of FIG. The exploded sectional view at the time of inserting the tip of the guided part of a holding member into the entrance part of the guide part of a frame member, explaining attachment of a holding member to a frame member in the embodiment. Explanatory sectional drawing which demonstrates the assembly | attachment to the frame member in the embodiment, and shows the positioning state by the 1st positioning means. Explanatory sectional drawing which demonstrates the assembly | attachment to the frame member in the embodiment, and shows the positioning state by the 2nd positioning means. Sectional drawing after completion | finish of an assembly explaining the assembly | attachment to the frame member of the holding member in the embodiment.

Explanation of symbols

1 Back cover 2 Circuit board 3 Frame member (second case body)
4 Pointer type display unit 5 Display unit 6 Cosmetic frame 7 Transparent cover 8 Screw 21, 22, 23 Light source 24 Connector (insertion connection unit)
31 Reflecting portion 32 Opening portion 33 Mounting portion 34 Guide portion (second guide portion)
35 Contacted part 36 Inserted part 37 Engaged part 38 Escaped part 41 Stepping motor 42 Pointer 43 Indicator part 44 Display panel 51 Display panel 52 Light guide plate 53 Holding member (first case body)
54 Cover member 341 Rotation restriction groove 511 Lead terminal (connection member)
531 Terminal support portion 532 Light introduction portion 533 Guided portion (first guide portion)
534 Contact portion 535 Insertion protrusion 536 Engagement portion 537 Receiving portion 538 Rotation restricting rib G Guide means AX1 Axisymmetric line AX2 Extension axis P Positioning means P1 First positioning means P2 Second positioning means R Restricting means

Claims (5)

A circuit board having an insertion connection;
A display panel having a plurality of connection members inserted and connected to the insertion connection portion and displaying predetermined information based on signal input through the connection members;
A first case body that holds the display panel in a state where at least the insertion connection portion side of the connection member is exposed;
A second case body for attaching and fixing the first case body;
In the display device in which the connection member is inserted and connected to the insertion connection portion by assembling and fixing the first case body to the second case body,
When assembling and fixing the first case body to the second case body to each of the first case body and the second case body,
Guide means for guiding the first case body to the second case body;
Positioning means for positioning the first case body on the second case body on the basis of the guide means and positioning the connection member on the insertion connection portion ;
The positioning means first positions the first case body and the connecting member, and the second positioning means positions the first case body and the connecting member next to the first positioning means. And positioning means
When the first case body and the connection member are positioned by the first positioning means, the first case body and the connection member are not positioned by the second positioning, and the second positioning means performs the positioning. The display device, wherein the first case body and the connection member are not positioned by the first positioning means during positioning of the first case body and the connection member.   A single column-shaped first guide portion provided on one of the first case body or the second case body along the insertion connection direction of the connection member, and the first guide A single and cylindrical second guide portion that is provided on the other side of the first case body or the second case body along the portion and that guides and inserts the first guide portion. The display device according to claim 1.   The first and second guide portions have a shape capable of restricting movement of the first case body in the rotation direction with reference to the guide means before the positioning means performs positioning, or the first guide portion. 2. A display device according to claim 1, further comprising restricting means for restricting movement of the case body in the rotational direction with reference to the guide means.   The display device according to claim 1, wherein the positioning unit positions the first case body in a rotation direction with reference to the guide unit. The positioning means is formed on the other of the first and second cases and an abutting portion or fitting portion formed on one of the first and second cases and positioned around the guide means. The display device according to claim 4, comprising a contacted portion or a fitted portion .

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