CN217145653U - Display device - Google Patents

Abstract

The utility model provides a can prevent the bad display device of outward appearance. A display device (1) according to an embodiment includes: a dial having a see-through portion; a display element disposed behind the see-through portion; a circuit board which is disposed behind the display element, is electrically connected to the display element, and has a ground line; a conductive member (80) which allows static electricity charged in the dial to flow to the ground; and a case (15) that supports the dial and the display element on the front side and has a support section (90) that supports the conductive member (80) between the circuit board and the dial. The conductive member (80) has: a first connection section (81) electrically connected to the dial; a second connection portion (82) electrically connected to the ground line; an intermediate portion (83) disposed between the first connection portion (81) and the second connection portion (82); a first connecting portion (84) that connects the first connecting portion (81) and the intermediate portion (83); and a second connection section (85) that connects the intermediate section (83) and the second connection section (82), and is supported in the front-rear direction by the support section (90) being sandwiched between the first connection section (81) and the intermediate section (83).

Description

Display device

Technical Field

The utility model relates to a display device that supplies vehicle to use etc.

Background

For example, patent document 1 discloses a display device having a conductive member for flowing static electricity carried on a display panel to a ground line of a circuit board in order to suppress erroneous display of a liquid crystal display. The conductive member is reliably in contact with the display panel and therefore in a state where tension is applied to the display panel. In addition, the display device has a ring liner member covering a non-display area of the display panel. The display panel is pressed by the ring lining member so as not to be floated by the tension from the conductive member.

Documents of the prior art

Patent document

Patent document 1: japanese patent application laid-open No. 2010-127800

The member for pressing the display panel, such as the above-described grommet member, is preferably disposed as close as possible to the position where the tension is applied to the conductive member. However, due to design of the display device and design constraints, there is a possibility that the member for pressing the display panel cannot be disposed at an appropriate position. In this case, the display device cannot suppress the floating of the display panel, and the appearance of the display device may be impaired.

SUMMERY OF THE UTILITY MODEL

The present invention has been made in view of such circumstances, and an object thereof is to provide a display device capable of preventing a poor appearance.

In order to solve the above problem, the display device of the present invention includes: a dial having a face direction facing the front-rear direction and having a see-through portion; a display element disposed behind the see-through portion so as to be visible from the front; a circuit board disposed at the rear of the display element, electrically connected to the display element, and having a ground line; a conductive member that causes static electricity charged to the dial to flow to the ground; and a case that supports the dial and the display element on a front side and has a support portion that supports the conductive member between the circuit substrate and the dial, the conductive member having: the first connecting part is electrically connected with the dial plate; a second connection part electrically connected to the ground wire; an intermediate portion disposed between the first connection portion and the second connection portion; a first connecting portion that connects the first connecting portion and the intermediate portion; and a second coupling portion that couples the intermediate portion and the second coupling portion and is supported in the front-rear direction by sandwiching the support portion between the first coupling portion and the intermediate portion.

Drawings

Fig. 1 is a front view of a display device according to an embodiment of the present invention.

Fig. 2 is a sectional view taken along line II-II of fig. 1.

Fig. 3 is a perspective view mainly showing the circuit board, the middle case, and the dial.

Fig. 4 is an explanatory view of the ground terminal and the conductive member particularly enlarged.

Fig. 5 is a perspective view illustrating the conductive member.

Fig. 6 is a sectional view in the front-rear direction of the conductive member of fig. 5.

Fig. 7 is an explanatory view particularly showing the conductive member supporting portion before the conductive member is mounted.

Fig. 8 is a cross-sectional view taken along line VIII-VIII of fig. 7 after the conductive member is mounted.

Description of the symbols

1 display device

2 Speedometer (SP)

3 Engine revolution counter (TA)

10 casing

11 outer case

12 opening

13 light-transmitting plate

5b light source substrate

14 outer edge

15 middle shell

16 penetration port

17 Panel support part

18 ring receiving part

19 front surface

20 ring lining

30 dial

31 appearance of the plate

32 number

33 symbol

34 graduation

35 perspective part

37 outer edge

40 ring part

41 anterior side supporting part

42 rear side supporting part

44 Ring hook

45 inner peripheral surface

50 circuit board

51 front surface

52 light source

55 pointer

56 ground terminal

57 front surface

60 display panel (display element)

61 Flexible substrate

70 light guide

71 diffusion plate

80 conductive member

81 Dial connecting surface (first connecting part)

82 ground connection surface (second connecting part)

83 middle surface (middle part)

84 front connecting surface (first connecting part)

85 rear connecting surface (second connecting part)

86 front convex part

87 rear convex part

88a, 88b, 88c, 88d boundaries

89 clamping space

90 conductive parts support (support)

91 clamped part

92 upper and lower walls

93 convex part accommodation space (concave part)

94 anticreep wall (restriction)

95. 97 outer edge

96 corner

98 sides

99 up-down supporting part

Detailed Description

Embodiments of a display device according to the present invention are described with reference to the drawings. The display device of the present invention can be applied to, for example, a display device mounted on a vehicle such as an automobile or a two-wheeled vehicle, a ship, an agricultural machine, or a construction machine.

Fig. 1 is a front view of a display device 1 according to an embodiment of the present invention.

Fig. 2 is a sectional view taken along line II-II of fig. 1.

Fig. 3 is a perspective view mainly showing the circuit board 50, the middle case 15, and the dial 30.

In the following description, "front (front)", "rear (back)", "upper", "lower", "right", and "left" are defined as "Fr.", "Re.", "To.", "Bo.", "R", and "L" in fig. 1 to 8. The side of the display device 1 that is visible to the user is referred to as "front".

The display device 1 has a speedometer (hereinafter referred to as "SP") 2 and an engine tachometer (hereinafter referred to as "TA") 3. SP2 is a pointer type (mechanical type) instrument that is disposed on the right side of the front view and displays the speed of the vehicle. TA3 is a pointer instrument disposed on the left side of the front view and displaying the engine speed of the vehicle. In the present embodiment, the description will be given mainly of the structure on the TA3 side associated with the display device 1, and the detailed description of the structure on the SP2 side will be omitted.

The display device 1 mainly has: case 10, ring bush 20, dial 30, ring portion 40, circuit board 50, display panel 60, light guide 70, and conductive member 80.

The housing 10 has an outer housing 1 and a middle housing 15.

The outer case 11 (not shown in fig. 2) is made of synthetic resin (e.g., polypropylene) such as black. The case body 11 accommodates various components such as the dial 30 and the circuit board 50 in the internal space.

The middle case 15 is a member having a substantially circular shape when viewed from the front, and is made of a synthetic resin (e.g., polypropylene) such as white. The middle case 15 fixes (places) the dial 30 in the internal space of the outer case 11 or functions as a light shielding wall of the light source 52. The middle case 15 mainly includes a transmission port 16 (fig. 7), a panel support portion 17 (fig. 7), a ring receiving portion 18, and a conductive member support portion 90.

The transmission port 16 transmits light from the light source 52 in accordance with the position of the mark 33 formed on the dial 30. The panel support portion 17 is a recess provided on the front surface 19 (fig. 7), and supports the display panel 60 on the front side.

The loop receiving portion 18 fixes the loop portion 40 to the forward facing outer edge 14 of the middle housing 15 by hooking the loop hooks 44. A required number of ring receivers 18 are provided at required positions of the outer rim 14.

The conductive member support portion 90 (support portion) supports the electrical component 80 between the circuit substrate 50 and the dial 30. The details of the conductive member support portion 90 will be described later.

The ring liner 20 is made of light-shielding synthetic resin (e.g., polypropylene) such as black. The ring liner 20 covers the front surface side of the outer case 11, and shields unnecessary regions in the case 10 from the user. Specifically, the ring bush 20 shields the area other than the dial 30 when viewed from the front. Further, the collar 20 and the dial 30 do not overlap in the front-rear direction. The ring liner 20 has an opening 12 at the front, the opening 12 being covered by the light-transmitting plate 13.

The dial 30 is a thin plate-like substantially perfect circular member having a planar direction facing in the front-rear direction. The dial 30 has a base material and a light shielding layer. The base material is, for example, a thin plate made of transparent force-concentrating resin. The light-shielding layer is a printed layer printed with black light-shielding ink formed on the front surface (or the back surface) of the base material. The light shielding layer has a hollow character portion corresponding to the shape of the external appearance 31. The appearance 31 comprises numerals 32, markings 33 and graduations 34. The exterior 31 is lighted and displayed by transmitting light from the light source 52.

The dial 30 has a see-through portion 35 for visually recognizing the display panel 60. The see-through portion 35 is formed by an opening formed in a portion of the dial 30 corresponding to the display panel 60 or an area where a light shielding layer is not formed.

The ring portion 40 is made of synthetic resin (e.g., polypropylene) having a ring shape such as black. The ring portion 40 has a front-side support portion 41, a rear-side support portion 42, and a ring hook 44 (fig. 2). The front-side support portion 41 and the rear-side support portion 42 are disposed forward with respect to the ring hook 44.

The front-side support portion 41 is a projection projecting radially inward from the inner peripheral surface 45 of the ring portion 40. The front-side supporting portion 41 is formed along the circumferential direction of the ring portion 40. The front support portion 41 restricts forward movement of the dial 30 on the outer edge 37 side of the dial 30.

The rear-side support portion 42 is a projection projecting radially inward from the inner peripheral surface 45 of the ring portion 40. A required number of rear-side support portions 42 are arranged at required positions in the circumferential direction of the ring portion 40. The rear support portion 42 restricts the movement of the dial 30 in the rearward direction on the outer edge 37 side of the dial 30. Thereby, the dial 30 is fixed and held by the front support portion 41 and the rear support portion 42.

The ring hook 44 fixes the ring portion 40 to the middle housing 15. The ring hook 44 is formed to protrude radially inward from the inner peripheral surface 45, and engages with the ring receiving portion 18 to fix the ring portion 40 in the front-rear direction. A required number of the ring hooks 44 are arranged at a required position in the circumferential direction of the ring portion 40.

The circuit board 50 is disposed rearward of the dial 30 and the middle case 15. The circuit board 50 is disposed behind the display panel 60 and electrically connected to the display panel 60. The circuit board 50 mainly includes a pointer driving unit (not shown), a light source 52, and a control unit including a pointer driving unit, a driver of the light source 52, and the like.

The control Unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and executes predetermined arithmetic Processing in accordance with a program written in the ROM, for example. The Control Unit acquires various pieces of vehicle information from, for example, an ECU (Electronic Control Unit) of the vehicle. The control section drives the pointer driving section and lights the light source 52 on the basis of the acquired information.

The pointer driving unit rotates the pointer shaft in accordance with the input running speed of the vehicle and the input engine speed. The pointer shaft is formed of a metal rod-like member extending (elongated) forward perpendicularly to the circuit board 50. The pointer shaft is connected at the front end to a pointer 55. The pointer 55 indicates the scale 34 by rotating on the front surface of the dial 30.

The Light source 52 is provided on the front surface 51 of the circuit board 50, and is, for example, a top-view (top-surface-emission) LED (Light Emitting Diode). The light sources 52 are provided in the required number behind the dial 30.

The circuit board 50 has a ground pattern (ground) and a ground terminal 56. Here, fig. 4 is a particularly enlarged explanatory view of the ground terminal 56 and the conductive member 80.

The ground pattern is electrically connected to the dial 30 via the ground terminal 56 and the conductive member 80, and discharges electricity charged to the dial 30. The ground terminal 56 is fixed to the circuit board 50 (ground pattern) by soldering. The ground terminal 56 is formed by bending a conductive metal plate into a zigzag shape, for example, and has elasticity in the front-rear direction.

The display panel 60 (display element) is disposed on the panel support portion 17 of the middle case 15. The display panel 60 is fixed to the middle case 15 by a hook (not shown), for example. The display panel 60 is disposed behind the see-through portion 35 so that the display screen can be viewed from the front.

The display panel 60 is a segment type liquid crystal display panel formed in a quadrangular shape. The display panel 60 includes a pair of glass substrates in which a liquid crystal layer is sealed. The pair of glass substrates have transparent electrodes made of ITO (Indium Tin Oxide) or the like. The display panel 60 includes a pair of polarizing plates (polarizing filters) sandwiching a pair of glass substrates. The display panel 60 is connected to a circuit board via a Flexible substrate 61 such as an FPC (Flexible Printed circuit). Thereby, the display panel 60 displays predetermined information.

The light guide 70 is made of a transparent synthetic resin, such as Polymethyl methacrylate (PMMA). The light guide 70 is fixed to the middle case 15, for example, on the outer periphery of the pointer shaft. The light guide 70 guides the light of the light source 52 to the exterior 31. A transparent diffusion plate 71 made of, for example, polyethylene resin is disposed in front of the light guide 70. The light from the light source 52 is further diffused by the diffuser plate 71, and the exterior 31 is illuminated so as not to have luminance unevenness.

The conductive member 80 is, for example, a conductive member made of metal, and causes static electricity charged to the dial 30 to flow to the ground pattern. Here, fig. 5 is a perspective view illustrating the conductive member 80. Fig. 6 is a sectional view of the conductive member 80 of fig. 5 along the front-rear direction.

The conductive member 80 has a dial attachment surface 81, a ground attachment surface 82, an intermediate surface 83, a front coupling surface 84, and a rear coupling surface 85.

The dial connection face 81 (first connection portion) is a face electrically connected to the dial 30. The dial attachment surface 81 has a front protrusion 86 protruding rearward and toward the conductive member support portion 90. The front convex portion 86 has a curved (spherical) shape.

The ground connection surface 82 (second connection portion) is a surface that is electrically connected to the ground pattern by being in contact with the front surface 57 (fig. 4) of the ground terminal 56.

The intermediate surface 83 (intermediate portion) is disposed between the dial connection surface 81 and the ground connection surface 82. The intermediate surface 83 has a rear protrusion 87 protruding forward and toward the conductive member support portion 90. The rear protrusion 87 has a curved surface (spherical surface) shape and is formed to face the front protrusion 86.

The front connection surface 84 (first connection portion) is a surface that connects the dial connection surface 81 and the intermediate surface 83 in the front-rear direction. The rear connecting surface 85 (second connecting portion) is a surface connecting the intermediate surface 83 and the ground connection surface 82 in the front-rear direction.

The surfaces 81-85 of the conductive member 80 are formed by sequentially bending a rectangular plate-like member having a length longer than a width into a substantially right angle and forming a boundary with a fold. Specifically, the conductive member 80 is a single plate-shaped member bent at a boundary 88a between the dial attachment surface 81 and the front attachment surface 84, a boundary 88b between the front attachment surface 84 and the intermediate surface 83, a boundary 88c between the intermediate surface 83 and the rear attachment surface 85, and a boundary 88d between the rear attachment surface 85 and the ground attachment surface 82.

When the dial attachment surface 81 is used as a starting point, the conductive member 80 is bent at each of the boundaries 88a, 88b, 88c, and 88d to form a substantially S-shape toward the rear. The conductive member 80 is bent so that the dial attachment surface 81, the intermediate surface 83, and the ground attachment surface 82 have substantially the same size. Therefore, the dial connection surface 81, the intermediate surface 83, and the ground connection surface 82 are arranged parallel to each other and overlap each other when viewed in the front-rear direction. As a result of the bending, the rear connecting surface 85 is positioned on the side of the intermediate surface 83 facing the side on which the front connecting surface 84 is formed, and the front connecting surface 84 and the rear connecting surface 85 have a parallel planar direction.

The conductive member 80 is bent so that the front coupling surface 84 and the rear coupling surface 85 have different lengths in the front-rear direction. Thus, the distance between the dial connection surface 81 and the intermediate surface 83 and the distance between the ground connection surface 82 and the intermediate surface 83 are different.

Next, the conductive member support portion 90 of the center housing 15 will be described in detail. Fig. 7 is an explanatory view particularly showing the conductive member support portion 90 before the conductive member 80 is attached. Fig. 8 is a sectional view taken along line VIII-VIII of fig. 7 after the conductive member 80 is mounted.

The conductive member support portion 90 is formed on the outer edge 14 side in the vicinity of the panel support portion 17 (display panel 60). The conductive member support portion 90 has a clamped portion 91 and upper and lower support portions 99.

The clamped portion 91 has upper and lower walls 92 and a retaining wall (restricting portion) 94. The upper and lower walls 92 are a pair of walls facing each other in the up-down direction. The outer shape of the clamped portion 91 is defined by the dimensions and the interval of the upper and lower walls 92, and is substantially rectangular parallelepiped. The substantially rectangular parallelepiped outer shape has substantially the same shape as the shape of the holding space 89 formed by the dial attachment surface 81, the front attachment surface 84, and the intermediate surface 83 of the conductive member 80. A boss accommodating space 93 is formed between the upper and lower walls 92. The convex portion accommodating space 93 is a concave portion for accommodating the front convex portion 86 and the rear convex portion 87.

The separation preventing wall 94 is substantially orthogonal to the upper and lower walls 92, and is disposed in a space between the upper and lower walls 92 so that the sandwiched portion 91 has a substantially H-shape when viewed from the front. The separation preventing wall 94 is formed along a direction from the front end to the rear end of the clamped portion 91. The detachment prevention wall 94 restricts movement (movement in the left-right direction) of the front protrusion 86 and the rear protrusion 87 accommodated in the front protrusion accommodating space 93 from the protrusion accommodating space 93.

The upper and lower walls 92 have outer edges 95 that contact the conductive member 80 and corners 96. The release preventing wall 94 also has an outer edge 97 that contacts the conductive member 80 (the front protrusion 86, the rear protrusion 87). These outer edges 95, 97 and the corner 96 have an R shape (chamfer).

The upper and lower support portions 99 are disposed in parallel with a surface 98 facing the lower side of the clamped portion 91 at a predetermined distance. The predetermined distance is a length by which the front coupling surface 84 of the conductive member 80 can be inserted between the vertical support portion 99 and the surface 98, and the vertical movement is restricted.

Next, an operation of the display device 1 in the mounting and an operation in the mounted state of the conductive member 80 will be described.

As shown in fig. 7, the conductive member 80 is attached to the conductive member support portion 90 while sliding from the right to the left. Specifically, the conductive member 80 is attached to the conductive member support portion 90 such that the front coupling surface 84 is inserted between the clamped portion 91 and the upper and lower support portions 99, and the clamped portion 91 is accommodated in the clamping space 89.

At this time, the operator may attach the conductive member 80 in the forward and backward direction in the reverse direction. However, in the conductive member 80, the distance between the dial attachment surface 81 and the intermediate surface 83 and the distance between the ground attachment surface 82 and the intermediate surface 83 are not the same. Therefore, the display device 1 can reduce erroneous mounting by the operator. In addition, the outer edge 95 and the corner 96 of the upper and lower walls 92 that contact the conductive member 80 have an R shape. Therefore, the conductive member 80 does not catch on the clamped portion 91 and slides smoothly. When the conductive member 80 further slides, the front protrusion 86 and the rear protrusion 87 pass over the outer edge 97 having the R shape of the detachment prevention wall 94 and are accommodated in the protrusion accommodating space 93.

As a result, the conductive member 80 is supported by the clamped portion 91 in the front-rear direction by clamping the clamped portion 91 between the dial attachment surface 81 and the intermediate surface 83. The retaining wall 94 acts on the front convex portion 86 and the rear convex portion 87, and the conductive member 80 is supported in the removal direction (left-right direction) of the conductive member 80. Further, the upper and lower support portions 99 also support the conductive member 80 in the upper and lower directions. This makes it possible to restrict the movement of the conductive member 80 even when vibration generated during traveling or the like acts on the conductive member 80.

The ground connection surface 82 of the conductive member 80 is in contact with the ground terminal 56 in a state where the ground terminal 56 having elasticity is lightly compressed. Thus, the conductive member 80 receives some force in the front direction. However, since the movement of the conductive member 80 in the front-rear direction is restricted by the conductive member support portion 90, the conductive member 80 can be prevented from being lifted forward, and the dial 30 can be prevented from being lifted up by the dial attachment surface 81. Therefore, the display device 1 can prevent poor appearance.

Since the dial 30 does not float, it is not necessary to dispose a member for pressing the dial 30 rearward in the vicinity of the contact portion with the conductive member 80. Therefore, the display device 1 can also be designed with an increased degree of freedom.

Several embodiments of the present invention have been described, but these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the scope of claims and the equivalent scope thereof.

For example, the shape of the middle case 15 and the dial 30 and the arrangement of the display pattern 60 are examples, and are not limited thereto.

The conductive member support portion 90 having the held portion 91 and the upper and lower support portions 99 is shown as an example of the support portion, but the shape of the support portion is not limited to this. For example, the clamped portion 91 may be a solid rectangular parallelepiped having a size corresponding to the clamping space 89, and the space for accommodating the convex portion may be formed as a recess in the rectangular parallelepiped.

A convex portion may be formed on at least one of the dial attachment surface 81 (first attachment portion) and the intermediate surface 83 (intermediate portion). In addition, the relationship between the convex portion and the concave portion may be reversed. For example, the conductive member 80 may have a notch formed by press working as a concave portion and a cut-and-raised shape in which the support portion of the housing 10 is bent and raised as a convex portion.

The ground connection surface 82 is bent in a direction facing the intermediate surface 83, but may be bent in a direction opposite to the intermediate surface 83. The ground terminal 56 is in contact with the ground connection surface 82, but may be in contact with the rear connection surface 85 without the ground connection surface 82. The ground terminal 56 may not be provided, and the ground connection surface 82 may be in contact with the circuit board 50.

Claims (5)

1. A display device is characterized by comprising:

a dial having a face direction facing the front-rear direction and having a see-through portion;

a display element disposed behind the see-through portion so as to be visible from the front;

a circuit board disposed at the rear of the display element, electrically connected to the display element, and having a ground line;

a conductive member that causes static electricity charged to the dial to flow to the ground; and

a case that supports the dial and the display element on a front side and has a support portion that supports the conductive member between the circuit substrate and the dial,

the conductive member has:

the first connecting part is electrically connected with the dial plate;

a second connection part electrically connected to the ground wire;

an intermediate portion disposed between the first connection portion and the second connection portion;

a first connecting portion that connects the first connecting portion and the intermediate portion; and

a second coupling portion that couples the intermediate portion and the second coupling portion,

is supported in the front-rear direction by sandwiching the support portion by the first connecting portion and the intermediate portion.

2. The display device according to claim 1,

at least one of the first connecting portion and the intermediate portion includes: a convex portion that protrudes in a direction toward the support portion,

the support portion has: a recess that receives the protrusion; and a restricting portion that restricts movement from the concave portion of the convex portion.

3. The display device according to claim 1,

the first connecting portion is spaced apart from the intermediate portion by a distance different from a distance between the second connecting portion and the intermediate portion.

4. The display device according to claim 1,

the support portion has an outer edge or a corner portion that contacts the conductive member,

at least a portion of the outer edge or the corner has an R-shape.

5. The display device according to claim 1,

the conductive member is a single plate-shaped member bent at a boundary between the first connecting portion and the first connecting portion, a boundary between the first connecting portion and the intermediate portion, a boundary between the intermediate portion and the second connecting portion, and a boundary between the second connecting portion and the second connecting portion.

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