JP2010151541A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for achieving control of abnormal sound generation. <P>SOLUTION: A combination meter 100 includes: a display plate 30 having an opening part 31 and displaying an index 32; a rear case 60 having the end part 61a of a cylinder part 61 projecting from the opening part 31 to the front of the display direction of the display plate 30, a locking claw 63 disposed on the end part 61a in a convex shape, and a display plate support face 65a for supporting the display plate 30 from the back of the display direction; and a fixing ring 70 fit to the end part 61a, having a locking face 73, the movement of which to the front of the display direction is controlled by making a contact to the locking claw 63 and a bias part 71 freely displaceable to the display direction and biasing the display plate 30 to the display plate support face 65a side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device that includes a display plate that displays an index and a support member that includes a support portion that supports the display plate from the rear side in the display direction.

  Conventionally, when a display device configured to support the display panel from the rear side in the display direction by the support part of the support member is installed in an environment where vibration is input, the separation and collision that occur between the display panel and the support part are repeated. There is a known problem that abnormal noise occurs due to the noise. In order to suppress the occurrence of this abnormal noise, the present inventors have conceived a display device as disclosed in Patent Document 1.

  The display device disclosed in Patent Document 1 is in contact with a protrusion, a support member further including a protrusion protruding from the opening of the display plate to the front side in the display direction, and a protrusion provided in a convex shape from the protrusion. A regulating surface that is restricted from moving forward in the display direction; and a fitting member that has a clamping surface that clamps the display plate together with the supporting portion, and that fits into the protruding portion of the supporting member. Note that the opening formed in the display plate is, for example, for penetrating a pointer shaft for driving a pointer that rotates along the front surface in the display direction of the display plate.

In the display device disclosed in Patent Document 1, the fitting member whose movement toward the front side in the display direction is regulated by bringing the regulating surface into contact with the convex portion provided in the protruding portion together with the support portion by the clamping surface. Is fixed. With this configuration, the effect of suppressing the occurrence of abnormal noise is obtained by preventing the display plate from being separated from the support portion in an environment where vibration is input to the display device.
JP 2008-20413 A

  Now, in the display device as disclosed in Patent Document 1, there is a dimensional limitation for securely fitting the fitting member to the protruding portion. More specifically, the dimension from the clamping surface of the fitting member to the regulation surface must be smaller than the dimension from the front surface in the display direction of the display plate to the position where it contacts the regulation surface of the convex portion. In addition, the protrusion and the fitting member are required to have a clearance fit.

  As described above, when the fitting between the protruding portion and the fitting member is a clearance fit, the fitting member reaches the position where the regulating surface can contact the convex portion due to external input such as vibration. Move forward in the display direction. At a relative position to the protrusion of the fitting member, a gap is generated between the clamping surface and the front side surface of the display plate in the display direction. Therefore, the fitting member does not completely hold and fix the display plate together with the support member by the holding surface, and in an environment where vibration is input to the display device, the separation of the display plate from the support member may not be prevented. there were.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a display device that can suppress generation of abnormal noise.

  To achieve the above object, according to the first aspect of the present invention, there is provided a display plate having an opening and displaying an indicator, a protrusion protruding from the opening toward the display direction front side of the display plate, and a protrusion protruding , A support member having a support part for supporting the display board from the rear side in the display direction, a first restricting part that is in contact with the convex part and is restricted from moving forward in the display direction, and freely displaceable in the display direction The display device includes a biasing portion that biases the display plate toward the support portion and a fitting member that fits into the protruding portion.

  According to this invention, the fitting member is fitted to the protruding portion that protrudes forward in the display direction from the opening of the display plate. The fitting member whose movement to the front side in the display direction is regulated by bringing the first regulating part into contact with the convex part provided in a convex shape on the projecting part urges the display plate to the support part by the urging part. More specifically, since the urging portion is freely displaceable in the display direction, the display plate can be reliably urged toward the support portion in contact with the display plate. Thus, the display plate urged toward the support portion by the fitting member maintains the contact state without being separated from the support portion even in an environment where vibration is input. Therefore, it is possible to provide a display device in which the generation of abnormal noise due to the collision between the display plate and the support member is suppressed.

In the invention according to claim 2, the fitting member has a second restricting surface that is inserted into the protruding portion from the front side in the display direction and contacts the front surface in the display direction of the display plate to restrict movement toward the rear side in the display direction. The urging portion includes a flexible beam that is provided in a beam shape along the second restriction surface and can be bent in the display direction, and a protrusion that protrudes rearward from the flexible beam in the display direction. And
According to this invention, the operation | work which inserts a fitting member into a protrusion part from the display direction front side is completed because the 2nd control surface of a fitting member contacts the display direction front surface of a display board. In this insertion operation, the protrusion that protrudes further to the rear side in the display direction from the flexible beam provided in a beam shape along the second restriction surface comes into contact with the front surface in the display direction of the display board before the second restriction surface. The urging portion including the protrusion is displaced forward in the display direction while bending the flexible beam that can be bent in the display direction. The amount of displacement of the urging portion toward the front side in the display direction becomes maximum at the position where the second restricting surface restricts the movement of the fitting member toward the rear side in the display direction, and is limited to the amount of protrusion or less of the protrusion. Thus, if the maximum displacement amount of the urging portion in the inserting operation of the fitting member is defined, damage to the urging portion can be suppressed. Therefore, the fitting member in a state of being fitted to the protruding portion can surely urge the display plate toward the support portion by the urging portion. Therefore, it is possible to further reliably suppress the generation of noise due to the collision between the display board and the support member.

  According to a third aspect of the present invention, the protrusion forms a spherical contact surface that makes point contact with the front surface of the display plate in the display direction. According to the present invention, the urging portion that makes point contact with the front surface of the display plate in the display direction by the protruding portion formed with the spherical contact surface surely faces the display plate toward the rear side in the display direction, that is, the support portion side. Can be energized. Thus, by forming the spherical contact surface on the projection, it is possible to realize the biasing of the display plate toward the support portion via the biasing portion by the fitting member with a simple configuration.

  The invention according to claim 4 is characterized in that the flexible beam is formed by a notch provided in the fitting member along the display direction. According to this invention, the flexible beam of the biasing portion is formed by providing the fitting member with the notch portion along the display direction. According to the fact that the flexible beam can be formed by a slight change in the shape of providing the notch, the fitting member can easily obtain the action of urging the display panel as described above to the support. .

  The invention according to claim 5 is characterized in that the fitting member has a plurality of the urging portions. According to the present invention, when the plurality of urging portions provided on the fitting member urge the display plate toward the support portion, the urging force for urging the display plate toward the support portion is easily improved. Can do. Therefore, even in an environment where vibration is input, the display panel can reliably maintain the state in contact with the support portion without being separated from the support portion. Therefore, it is possible to reliably suppress the generation of abnormal noise due to the collision between the display board and the support member.

  The invention according to claim 6 is characterized in that the plurality of urging portions are arranged at equal intervals on the fitting member. According to the present invention, when the plurality of urging portions arranged on the fitting member at equal intervals urge the display plate toward the support portion, the peripheral edge of the opening of the display plate is evenly placed on the support portion side. It will be energized. Therefore, even in an environment where vibration is input, the display panel can maintain a state in contact with the support portion without being separated from the support portion. Therefore, the generation of abnormal noise due to the collision between the display board and the support member can be more reliably suppressed.

  Here, the opening of the display plate and the fitting member are shielded from the front side in the display direction by the shielding member. This shielding member prevents the appearance of the display device from deteriorating caused by visual recognition of the opening and the fitting member from the front side in the display direction.

  The invention according to claim 7 is a display device including a shielding member that shields the opening and the fitting member from the front side in the display direction, and the biasing portion is formed along the outer shape of the fitting member. It is characterized by. According to this invention, the enlarging of the fitting member due to the provision of the urging portion is suppressed by forming the urging portion along the outer shape of the fitting member. Therefore, the appearance of the display device is hardly deteriorated due to the biasing portion of the fitting member being viewed from the front side in the display direction without being shielded by the shielding member. Therefore, it is possible to obtain a display device in which the generation of abnormal noise is suppressed without impairing the appearance.

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

  FIG. 1 is a front view of a speedometer 20 constituting a combination meter 100 according to an embodiment of the present invention. The combination meter 100 is a display device that is housed in an instrument panel provided in a vehicle interior of a vehicle and is arranged with the front side shown in FIG. 1 facing the driver's seat side.

(Basic configuration)
The basic configuration of one embodiment of the present invention will be described below.

  The combination meter 100 includes a speedometer 20 that displays information related to vehicle information, and instruments (not shown) such as a tachometer, a water temperature gauge, an oil temperature gauge, a fuel gauge, and a voltmeter. The display of the speedometer 20 is formed by a display board 30 that displays the indicator 32, a pointer 40 that rotates along the front side of the display board 30 in the display direction, a decorative ring 36 provided on the outer edge of the display board 30, and the like. . The indicator 32 displayed by the display board 30 includes a scale portion 32a, a numeric portion 32b, and a character portion 32c. The scale portions 32a are arranged on the display plate 30 radially and at equal intervals with the rotation center of the pointer 40 as a base point. The scale part 32a displays a rectangular design whose longitudinal direction is the direction in which the pointer 40 extends. The number portion 32 b displays a design imitating a number, and is arranged on the rotation center side of the pointer 40 on the display plate 30 with respect to the scale portion 32 a. The character portion 32 c displays a design imitating a character representing a unit of speed, and is disposed on the display board 30 below the center of rotation of the pointer 40. Thus, by indicating the indicator 32 displayed on the display board 30 with the rotating pointer 40, the speedometer 20 can display information on the traveling speed of the vehicle. In addition, the decoration ring 36 can indicate the boundary between the speedometer 20 and other instruments in the combination meter 100 on the display. In addition, the scale part 32a, the number part 32b, the character part 32c, and the pointer | guide 40 are light-emitted and displayed.

  FIG. 2 shows the mechanical configuration of the combination meter 100. The combination meter 100 includes a housing 50 and a circuit board 80 in addition to the display board 30 and the pointer 40 described above. Furthermore, the combination meter 100 includes a fixing ring 70 for attaching the display board 30 to the housing 50.

  The housing 50 is configured by assembling a plurality of members such as the rear case 60, the rear cover 57, the front case 53, the front panel 51, and the like.

  The rear case 60 is made of a resin material such as polypropylene. The rear case 60 includes display panel support surfaces 65a and 65b, a cylindrical portion 61, a locking claw 63, and a substrate support surface 66. The display plate support surfaces 65 a and 65 b are formed on the front side in the display direction of the rear case 60 and are in contact with the rear surface in the display direction of the display plate 30. The rear case 60 supports the display plate 30 from the rear side in the display direction by the display plate support portions 65a and 65b. The display plate support portion 65 a is in contact with the center portion of the display plate 30, and the display plate support portion 65 b is in contact with the outer edge portion of the display plate 30.

  The cylindrical portion 61 of the rear case 60 is formed in a cylindrical shape along the display direction. An end portion 61 b on the rear side in the display direction of the cylindrical portion 61 is in contact with the circuit board 80. Further, the end portion 61a on the front side in the display direction of the cylindrical portion 61 protrudes from the opening portion 31 of the display plate 30 described later to the front side in the display direction. From the end 61a, a convex locking claw 63 is formed toward the radially outer side. The locking claws 63 are provided at two opposing positions in the circumferential direction of the end portion 61a. The board support surface 66 is formed on the rear side of the rear case 60 in the display direction, and is in contact with the front side of the circuit board 80 in the display direction.

  The rear cover 57 is a bottomed container formed of a resin material such as polypropylene. The rear cover 57 is assembled to the rear side of the rear case 60 in the display direction by, for example, a fixing claw (not shown). The rear cover 57 accommodates the circuit board 80 disposed on the rear side in the display direction of the rear case 60 and prevents adhesion of dust, dust, and the like from the rear side in the display direction to the circuit board 80.

  The front case 53 is formed in a cylindrical shape from a resin material such as polypropylene. On the inner surface side of the front case 53, an anti-glare portion 53a for anti-glare is formed by a black coating that suppresses reflection of light and a texture that diffusely reflects light. The rear side of the front case 53 in the display direction is assembled to the front side of the rear case 60 in the display direction by a fixing claw (not shown) or the like. In addition, a front panel 51 is assembled on the front side of the front case 53 in the display direction by a fixing claw (not shown) or the like. The front panel 51 is formed of a light-transmitting material such as a colorless and transparent acrylic resin, and has a good appearance by a method of forming an antireflection film for preventing reflection of extraneous light or the like on the surface.

  The circuit board 80 is made of a paper phenolic or glass epoxy hard substrate. The circuit board 80 is provided with a wiring pattern (not shown) made of a predetermined copper foil material on both sides and a hole 80a penetrating in the display direction. A stepper motor 81, a meter controller 85, and the like are mounted on the rear surface of the circuit board 80 in the display direction. The stepper motor 81 has a pointer shaft 81a extending through the hole 80a of the circuit board 80 and the cylindrical portion 61 of the rear case 60 to the front side in the display direction of the display panel 30. Light emitting diodes 82a and 82b are mounted on the front surface of the circuit board 80 in the display direction. The light-emitting diodes 82a and 82b are chip-type light-emitting diodes, and emit light beams toward the front side in the display direction.

  The display panel 30 is made of a light-transmitting material such as colorless and transparent polycarbonate, and is formed by performing light-shielding printing on the surface of a sheet material formed to a thickness of about 0.5 millimeters. A portion corresponding to the index 32 on the display board 30 is a light-transmitting portion that is not subjected to light-shielding printing. The light transmitting part can transmit the light beam emitted from the light emitting diode 82b. With this configuration, the display board 30 can display the scale portion 32a, the numeric portion 32b (see FIG. 1), and the character portion 32c by light emission. In addition, the display plate 30 has an opening 31 that is fitted to the outside of the cylindrical portion 61 of the rear case 60. The peripheral edge 31a of the opening 31 is in contact with the display plate support surface 65a of the rear case 60 on the rear side in the display direction.

  The pointer 40 has a pointer part 41 and a cap part 43. The pointer portion 41 is made of a light transmissive material such as acrylic resin. The pointer portion 41 is opposed to the light emitting diode 82a with the pointer 40 attached. With this arrangement, the luminous flux emitted from the light emitting diode 82a is incident on the pointer portion 41. By emitting the light beam incident on the pointer unit 41 to the front side in the display direction, the pointer 40 is displayed in a light-emitting manner. The cap portion 43 is a disk-shaped member that is formed of a light-shielding material such as black ABS resin and is curved in a convex shape toward the front side in the display direction. The pointer 40 is attached to the stepper motor 81 by fitting the cap portion 43 to the tip of the pointer shaft 81a. The cap part 43 shields the opening part 31 of the display board 30, the cylindrical part 61 of the rear case 60, and the fixing ring 70 from the front side in the display direction, and conceals them for visual recognition.

  The fixing ring 70 is formed in a cylindrical shape from a resin material such as polyacetal resin, has an annular outer shape, and includes a locking surface 73 and a display plate pressing surface 75. The outer diameter of the annular fixing ring 70 is smaller than the outer diameter of the disc-shaped cap portion 43. The fixing ring 70 is inserted into the cylindrical portion 61 of the rear case 60 from the front side in the display direction with its axial direction aligned with the display direction, and is engaged with the end portion 61a. The locking surface 73 is a surface formed on the inner peripheral side of the fixing ring 70 toward the front side in the display direction, and contacts the locking claw 63 of the rear case 60 to lock the fixing ring 70 to the end portion 61a. ing. Such contact between the locking surface 73 and the locking claw 63 restricts the movement of the fixing ring 70 toward the front side in the display direction. Further, the display plate pressing surface 75 is an end surface on the rear side in the display direction of the fixing ring 70, and the display plate 30 on the front side in the display direction of the display plate 30 is applied to the fixing ring 70 by applying a backward insertion force in the display direction. Can touch. According to the contact between the display plate pressing surface 75 and the front surface of the display plate 30 in the display direction, the movement of the fixing ring 70 to the rear side in the display direction is restricted.

  Further, the fixing ring 70 has a dimensional restriction for securely fitting to the end portion 61a. In the fixing ring 70, the dimension from the display plate pressing surface 75 to the locking surface 73 is more specific than the dimension from the front surface in the display direction of the display plate 30 to the position contacting the locking surface 73 of the locking claw 63. Specifically, the reference dimension is about 0.1 millimeters smaller. In addition, the minimum inner peripheral diameter D7 (see FIG. 5) of the fixing ring 70 fitted to the end portion 61a is larger than the outer peripheral diameter d6 (see FIG. 5) of the portion excluding the locking portion 63 of the end portion 61a. Is also big. Therefore, the fixing ring 70 is fitted to the end portion 61a with a clearance fit. This originates in the structure straddling the latching claw 63 provided in the end 61a when the fixing ring 70 is inserted into the end 61a from the front side in the display direction.

  FIG. 3 shows the electrical configuration of the combination meter 100. The combination meter 100 includes a meter control unit 85, a stepper motor 81, light emitting diodes 82a and 82b, and the like. The combination meter 100 is connected to an external battery 95, an ignition relay 94, an on-board controller area network (CAN) 91, and a grounded ground wiring 98.

  The meter control unit 85 is composed of a microcomputer that operates according to a program. The meter control unit 85 has a power supply system that is always in conduction with the battery 95 and a power supply system via an ignition relay 94, and is supplied with power from the battery 95. In addition, the meter control unit 85 is connected to the CAN 91 mounted on the vehicle, and acquires information on the vehicle speed output to the CAN 91 and information on the ON / OFF state of the ignition switch 93. The meter control unit 85 is connected to the light emitting diodes 82a and 82b, and applies a voltage to the light emitting diodes 82a and 82b based on the acquired information on the ON / OFF state of the ignition. Further, the meter control unit 85 is connected to the stepper motor 81, and calculates a rotation direction, a rotation angle, and a rotation speed at which the pointer shaft 81a (see FIG. 2) should rotate based on the acquired information on the vehicle speed. Then, the pulse power corresponding to the calculation result is output to the stepper motor 81.

  The light emitting diodes 82a and 82b are semiconductor elements that convert electric energy into light energy. The light emitting diodes 82a and 82b emit light beams when a voltage is applied from the meter controller 85. Further, the stepper motor 81 includes a rotor that rotates in synchronization with the input pulse power. The pointer shaft 81a of the stepper motor 81 is integral with the rotor, and rotates to a desired angle in the direction to be rotated in accordance with the pulse power input from the meter control unit 85.

  Here, a power supply control circuit 92 is provided on the CAN 91. The power supply control circuit 92 is connected to a battery 95, an ignition switch 93, an ignition relay 94, an engine control circuit (not shown), and the like. The power supply control circuit 92 is supplied with power from the battery 95, detects a pressing operation of the ignition switch 93 by the driver, applies a voltage to the ignition relay 94, and puts the relay 94 in an energized state. To do. Further, the power supply control circuit 92 outputs information on the ON / OFF state of the vehicle ignition on the CAN 91 based on the detected pressing operation of the ignition switch 93 by the driver.

  According to the above configuration, when the driver operates the ignition switch 93, the power supply control circuit 92 turns on the ignition state of the vehicle. At this time, the power supply control circuit 92 applies a voltage to the ignition relay 94 to make the battery 95 and the meter control unit 85 conductive. At the same time, information that the ignition state of the vehicle is ON is output on the CAN 91. After acquiring the information that the ignition state of the vehicle is ON, the meter control unit 85 starts acquiring information regarding the vehicle speed through the CAN 91. The meter control unit 85 applies a voltage to the light emitting diodes 82 a and 82 b based on the information acquired from the CAN 91 and outputs the pulse power of the stepper motor 81. By the operation of the meter control unit 85, the light emitting diodes 82a and 82b emit light beams, and the stepper motor 81 rotates the pointer shaft 81a at an angle corresponding to the vehicle speed.

  According to the operation of the combination meter 100 described above, the pointer 40, the scale portion 32a, the number portion 32b, and the character portion 32c shown in FIG. 1 emit light. Further, the tip of the pointer portion 41 of the pointer 40 can point to one of the plurality of scale portions 32a by rotating the pointer shaft 81a to an angle corresponding to the vehicle speed. Thus, a display in which the tip of the pointer 40 indicates the scale portion 32a corresponding to the vehicle speed is formed on the speedometer 20 of the combination meter 100.

  Further, when the operation of the ignition switch 93 shown in FIG. 3 is performed again by the driver, the power supply control circuit 92 turns off the ignition state of the vehicle. At this time, the power supply control circuit 92 stops the application of the voltage to the ignition relay 94 and stops the conduction between the battery 95 and the meter control unit 85. At the same time, information indicating that the ignition state of the vehicle is OFF is output on the CAN 91. After acquiring the information that the ignition state of the vehicle is OFF, the meter control unit 85 stops applying the voltage to the light emitting diodes 82a and 82b, and returns the pointer shaft 81a to the stepper motor 81. Outputs pulse power. By the operation of the meter control unit 85, the light emitting diodes 82a and 82b stop emitting the light flux, and the pointer shaft 81a of the stepper motor 81 is returned to zero.

  According to the operation of the combination meter 100 described above, the pointer 40, the scale portion 32a, the number portion 32b, and the character portion 32c shown in FIG. 1 are turned off. In addition, the pointer 40 returns to zero. Therefore, the speedometer 20 of the combination meter 100 stops displaying the vehicle speed.

(Characteristic part)
Hereinafter, the fixing ring 70 which is a characteristic part of the combination meter 100 according to an embodiment of the present invention will be described in detail.

  As shown in FIGS. 4A and 4B, the fixing ring 70 can be displaced in the display direction and urges the display plate 30 toward the display plate support surface 65a of the rear case 60 (see FIG. 2). One urging portion 71 is further provided. The three urging portions 71 are arranged at equal intervals of 120 degrees in the circumferential direction of the fixing ring 70. The urging unit 71 is provided in a cantilever shape along the display plate pressing surface 75, and is a flexible beam 71a that can be freely bent in the display direction, and a protrusion 71b that protrudes rearward in the display direction from the flexible beam 71a. It has. The flexible beam 71 a is formed by a notch 77 provided in the fixing ring 70. The notch 77 has a depth direction along the display direction, and is formed in an arc shape that follows the annular outer shape of the fixing ring 70. In addition, the notch part 77 does not need to penetrate in the depth direction. The protrusion 71b protrudes about 0.2 millimeters, for example, toward the rear side in the display direction along the insertion direction with the display plate pressing surface 75 of the fixing ring 70 as a reference. In addition, the protrusion 71 b includes a contact surface 71 c formed in a spherical shape, and is in point contact with the front surface (see FIG. 2) of the display plate 30 in the display direction.

  The operation for inserting and fitting the fixing ring 70 as described above into the end portion 61a of the rear case 60 from the front side in the display direction will be described with reference to FIG.

  An operator applies a radial load to the fixing ring 70 to elastically deform the fixing ring 70 into an elliptical shape. The operator fixes the fixed ring 70 in a state in which the major axis direction (vertical direction in FIG. 5) of the deformed fixing ring 70 is aligned with the radial direction of the cylindrical portion 61 in which the pair of locking claws 63 are formed. The ring 70 is inserted into the end portion 61a. As a result, the locking surface 73 of the fixing ring 70 straddles the locking claw 63, and the tip of the projection 71 b of the urging portion 71 is in contact with the display direction front surface of the display plate 30. Note that the application of the load by the operator may be stopped at the stage of being inserted to the rear side in the display direction with respect to the locking claw 63. As the operator continues to push the fixing ring 70 backward in the display direction, the urging portion 71 having the protrusion 71b is pushed forward in the display direction by the display plate 30 while bending the flexible beam 71a. Displace to the front of the display direction. When the insertion operation is continued, the display plate pressing surface 75 of the fixing ring 70 comes into contact with the front surface of the display plate 30 in the display direction, and the displacement of the fixing ring 70 to the rear side in the display direction is restricted. In a contact state between the display plate pressing surface 75 of the fixing ring 70 and the front surface of the display plate 30 in the display direction, the urging portion 71 is displaced to the front in the display direction by about 0.2 mm, which is the height of the protrusion 71b. Will be. Through the above steps, the operation of inserting the fixing ring 70 into the end portion 61a from the front side in the display direction is completed.

  In the present embodiment described so far, the fixing ring 70 whose movement toward the front side in the display direction is controlled by bringing the locking surface 73 into contact with the locking claw 63 brings the urging portion 71 into contact with the display plate 30. The display plate 30 can be reliably urged toward the display plate support surface 65 a of the rear case 60. Specifically, the urging portion 71 in the above embodiment contacts the display plate 30 in a state of being displaced about 0.1 millimeters in the display direction, and the display plate 30 is supported by the elastic force generated by the displacement. It is biased toward the 65a side. Thus, the display plate 30 urged toward the display plate support surface 65a side of the rear case 60 by the fixing ring 70 contacts without being separated from the display plate support surface 65a even in an environment where vibration is input. Maintain state. Therefore, it is possible to provide the combination meter 100 in which the generation of noise due to the collision between the display plate 30 and the rear case 60 is suppressed.

  In addition, in this embodiment, the operation of fitting the fixing ring 70 to the end portion 61a is completed by the contact between the display plate pressing surface 75 of the fixing ring 70 and the display direction front surface of the display plate 30. In this operation, the displacement amount of the urging portion 71 toward the front side in the display direction is maximized at the position where the movement of the fixing ring 70 toward the rear side in the display direction is restricted by the display plate pressing surface 75, and the protrusion amount of the protrusion portion 71b. Is limited to about 0.2 millimeters or less. Thus, if the maximum displacement amount of the urging portion 71 during the fitting operation of the fixing ring 70 is defined, damage to the urging portion 71 can be suppressed. Therefore, the fixing ring 70 fitted to the end portion 61 a of the cylindrical portion 61 can surely urge the display plate 30 toward the display plate support surface 65 a of the rear case 60 by the urging portion 71. Therefore, the generation of abnormal noise due to the collision between the display plate 30 and the rear case 60 can be more reliably suppressed.

  In this embodiment, the urging portion 71 that makes point contact with the front surface in the display direction of the display plate 30 by the projection 71b formed with the spherical contact surface 71c ensures that the display plate 30 is rearward in the display direction, that is, the rear case. 60 can be biased toward the display panel support surface 65a side. By thus forming the spherical contact surface 71c on the protrusion 71b, the urging of the display plate 30 toward the display plate support surface 65a via the urging portion 71 by the fixing ring 70 with a simple configuration. Can be realized.

  Furthermore, in this embodiment, the flexible beam 71a of the urging | biasing part 71 is formed by providing the notch part 77 provided in the fixing ring 70 with the depth direction along a display direction. According to the fact that the flexible beam 71a can be formed by a slight change in the shape of providing the notch 77, the action of urging the display plate 30 as described above toward the display plate support surface 65a of the rear case 60 is fixed. The ring 70 can be easily acquired. In this way, by forming the flexible beam 71a by the notch portion 77, specifically, as a measure against abnormal noise to be applied to the combination meter 100 in which the collision between the display plate 30 and the rear case 60 has become obvious, The present invention is particularly suitable.

  In addition, in the embodiment, when the three biasing portions 71 of the fixing ring 70 bias the display plate 30 toward the display plate support surface 65a of the rear case 60, the display plate 30 is moved toward the display plate support surface 65a. It is possible to easily improve the urging force for urging the power. In addition, according to the three urging portions 71 being arranged on the fixing ring 70 at equal intervals, the peripheral edge portion 31a of the opening portion 31 is equal to the display plate support surface 65a of the rear case 60 on the rear side in the display direction. Will be energized. Therefore, even in an environment where vibration is input, the display panel 30 can maintain a state of being in contact with the display panel support surface 65a without being separated from the rear case 60. Therefore, the generation of abnormal noise due to the collision between the display plate 30 and the rear case 60 can be more reliably suppressed.

  In addition, the opening 31 and the fixing ring 70 of the display board 30 must be shielded from the front side in the display direction by the cap portion 43 of the pointer 40 in order to prevent the appearance of the combination meter 100 from deteriorating. Therefore, in the present embodiment, the urging portion 71 is formed along the annular outer shape of the fixing ring 70, so that the increase in the size of the fixing ring 70 due to the provision of the urging portion 71 is suppressed. Therefore, the fixing ring 70 is not shielded by the cap portion 43 and the appearance is not easily deteriorated due to the biasing portion 71 being viewed from the front side in the display direction. Therefore, it is possible to obtain the combination meter 100 in which the generation of abnormal noise is suppressed without impairing the appearance. Further, according to the effect of preventing the appearance deterioration by suppressing the increase in the size of the fixing ring 70, it is used as a countermeasure against abnormal noise applied to the combination meter 100 in which the collision between the display plate 30 and the rear case 60 has become obvious. It is particularly suitable.

  In the present embodiment, the cap portion 43 is the “shielding member” according to the claims, the rear case 60 is the “support member” according to the claims, and the display plate support surface 65a is the “support portion” according to the claims. The end portion 61a of the cylindrical portion 61 on the front side in the display direction is the “protruding portion” described in the claims, the locking claw 63 is the “convex portion” described in the claims, and the fixing ring 70 is described in the claims. The locking surface 73 corresponds to the “first regulating portion” described in the claims, and the display plate pressing surface 75 corresponds to the “second regulating surface” described in the claims.

(Other embodiments)
Although one embodiment of the present invention has been described above, the present invention is not construed as being limited to this embodiment, and can be applied to various embodiments without departing from the scope of the invention.

  In the above-described embodiment, the urging portion 71 includes the flexible beam 71a provided in a cantilever shape and the protruding portion 71b protruding from the flexible beam 71a. However, the configuration of the urging unit 71 is not limited. For example, it may be a fixing ring having an urging portion having a flexible portion provided in a doubly supported beam shape or an urging portion having a member such as a separate coil spring.

  In the embodiment described above, by providing the fixing ring 70 with the display plate pressing surface 75 that restricts the movement toward the rear side in the display direction, the flexible beam 71a has a maximum deflection amount toward the front side in the display direction, and prevents damage. It had been. However, a fixing ring having a display plate pressing surface that does not define the maximum displacement amount of the flexible portion 71a or a fixing ring having no display plate pressing surface may be used.

  In the above embodiment, the protrusion 71 b included in the urging portion 71 forms a spherical contact surface that makes point contact with the front surface of the display plate 30 in the display direction. However, the shape of the protrusion is not limited. For example, the protrusion 71b may be in a line contact or surface contact with the front surface of the display panel 30 in the display direction. Specifically, the protrusion may protrude in a columnar shape from the flexible part toward the rear side in the display direction. Alternatively, it may be an urging portion that includes a flexible beam that is not provided with a protrusion but is inclined rearward in the display direction.

  In the above embodiment, three urging portions 71 are provided on the fixing ring 70 at equal intervals. However, the position where the urging portion 71 is provided and the number provided are not limited at all. One or more urging portions may be provided on the fixing ring, and may not be provided at regular intervals.

  In the above embodiment, the flexible beam 71a is formed along the notch that is provided along the display direction and penetrates in the display direction. However, the shape of the notch is not limited as long as an appropriate spring constant can be applied to the flexible beam 71a to urge the display plate. In addition, the flexible beam need not be formed by a notch. For example, the flexible beam may not have the outer shape of the fixing ring but may have a shape protruding in the radial direction from the outer edge. Furthermore, it may be a flexible part that is not shielded by the cap part 43 and that is visible from the front side in the display direction due to the shape protruding from the outer edge of the fixing ring.

  And in the said embodiment, it demonstrated based on the example which applied this invention to the speedometer 20 which comprises the combination meter 100. FIG. However, the present invention is not limited to the speedometer 20, and may be applied to various instruments constituting the combination meter, specifically, a tachometer, a water temperature gauge, an oil temperature gauge, a fuel gauge, and a voltmeter.

It is a front view of the combination meter by one Embodiment of this invention. It is a schematic diagram which shows the mechanical structure of the combination meter by one Embodiment of this invention, Comprising: It is the II-II sectional view taken on the line of FIG. It is a block diagram which shows the electric constitution of the combination meter by one Embodiment of this invention. It is a figure which shows the shape of the fixing ring which is the characterizing part of this invention. It is a figure explaining the fitting operation | work to the rear case of the fixing ring which is the characteristic part of this invention.

Explanation of symbols

20 Speedometer, 30 Display board, 31 Opening part, 31a Peripheral part, 32 Index, 32a Scale part, 32b Number part, 32c Character part, 36 Decoration ring, 40 Pointer, 41 Pointer, 43 Pointer cover (shielding member), 50 Case, 51 Front panel, 53 Front case, 53a Anti-glare part, 57 Rear cover, 60 Rear case (support member), 61 Cylindrical part, 61a End part (projection part), 61b End part, 63 Locking claw (convex part) , 65a Display board support surface (support part), 65b Display board support surface, 66 Substrate support surface, 70 Fixing ring (fitting member), 71 Energizing part, 71a Flexible beam, 71b Protrusion part, 71c Contact surface, 73 Locking surface (first restricting portion), 75 display plate pressing surface (second restricting surface), 77 notch portion, 80 circuit board, 80a hole portion, 81 stepper motor, 8 a pointer shaft, 82a, 82b emitting diodes, 85 meter control unit, 91 CAN, 92 power supply control circuit, 93 an ignition switch, 94 an ignition relay 95 battery, 98 ground wiring, 100 combination meter (display device)

Claims (7)

A display board having an opening and displaying an indicator;
A support member having a protrusion protruding from the opening to the front side in the display direction of the display plate, a protrusion provided in a protrusion on the protrusion, and a support portion for supporting the display plate from the rear side in the display direction;
A first restricting portion that is in contact with the convex portion and is restricted from moving forward in the display direction, and a biasing portion that is displaceable in the display direction and biases the display plate toward the support portion; And a fitting member fitted to the protruding portion. The fitting member is inserted into the protruding portion from the front side in the display direction, and has a second restriction surface that contacts the display direction front surface of the display plate and restricts the movement to the rear side in the display direction,
The urging portion includes a flexible beam which is provided in a beam shape along the second restriction surface and can be bent in the display direction, and a protrusion protruding from the flexible beam to the rear side in the display direction. The display device according to claim 1.   The display device according to claim 2, wherein the protrusion forms a spherical contact surface that makes point contact with the front surface of the display plate in the display direction.   The display device according to claim 2, wherein the flexible beam is formed by a notch portion provided in the fitting member along a display direction.   The display device according to claim 1, wherein the fitting member includes a plurality of the urging portions.   The display device according to claim 5, wherein the plurality of urging portions are arranged at equal intervals on the fitting member. A display device comprising a shielding member that shields the opening and the fitting member from the front side in the display direction,
The display device according to claim 1, wherein the urging portion is formed along an outer shape of the fitting member.

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