JP2016090295A - Instrument device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an instrument device that improves a degree of arrangement freedom of components.SOLUTION: An instrument device comprises: a display unit 10 that displays a travelling status of a vehicle; a first circuit substrate 12a that electrically connects to the display unit 10; a case 13 that houses the display unit 10 and the first circuit substrate 12a; a magnet 14 that rotates together with a rotation cable 9 transmitting revolutions of a vehicle speed; and a hole IC15 that detects revolutions of a detected body. The instrument device has a cover 40 that houses a second circuit board 12b different from the first circuit substrate 12a, in which the hole IC15 is provided in the second circuit substrate 12b, and the magnet 14 and the hole IC15, and further comprises a shield part 50 that is arranged in the second circuit substrate 12b. The first circuit substrate 12a and the second circuit substrate 12b are connected by a connection member 70 having flexibility.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an instrument device that displays the speed of a moving body, and more particularly to an instrument device that displays the speed of a two-wheeled vehicle.

  Conventionally, an instrument device that displays the speed of a moving body such as a two-wheeled vehicle receives a detection signal from a rotation detector provided on a hub of a front wheel of the two-wheeled vehicle via a wiring cord. The instrument device displays the speed of the two-wheeled vehicle based on the sent detection signal (see, for example, Patent Document 1).

In this conventional instrument device, the rotation detector employs a Hall IC or MR element as a sensor. Since the place where the rotation detector is installed is a hub of a front wheel of a two-wheeled vehicle, a waterproof and dustproof structure has to be applied to protect the sensor, and there is a problem that costs are increased. Thus, there has been an instrument device that has been made paying attention to such a problem (for example, Patent Document 2).
JP-A-9-229714 JP 2008-32615 A

  In a conventional instrument device, a speedometer that displays the speed of the vehicle, a circuit board that is electrically connected to the speedometer, a case that houses the speedometer and the circuit board, and rotation of the speed of the vehicle are transmitted. It is known that a magnet that rotates together with a rotating cable and a Hall IC that detects the rotation of the magnet are provided, and the Hall IC is provided on a circuit board and accommodated in a case.

  Since such an instrument device is such that the magnet is arranged at a position away from the speedometer so that the magnetic field from the magnet does not affect the speedometer, the arrangement of components on the circuit board accommodated in the case There was a problem that the degree of freedom was lost.

  Therefore, the present invention has been made paying attention to such a problem, and an object thereof is to provide an instrument device having an improved degree of freedom in arranging components.

  An instrument device according to the present invention includes a display that displays a traveling state of a vehicle, a first circuit board that is electrically connected to the display, and a case that houses the display and the first circuit board. In a meter device comprising: a detected object that rotates together with a rotating cable that transmits rotation of a vehicle speed; and a detection unit that detects the rotation of the detected object, a second that is different from the first circuit board The circuit board and the detection unit are provided on the second circuit board, and a cover for accommodating the detected object and the detection unit is provided, and a shielding unit disposed on the second circuit board is further provided. The first circuit board and the second circuit board are connected by a connecting member.

  Moreover, the said shielding part is arrange | positioned at the said to-be-detected body side of a said 2nd circuit board.

  Moreover, the said shielding part has an opening part for the said detection part to expose.

  Moreover, the said shielding part is arrange | positioned on the opposite side to the said to-be-detected body side of a said 2nd circuit board.

  As described above, according to the instrument device of the present invention, it is possible to provide an instrument device in which the degree of freedom of component placement is improved.

Explanatory drawing of the two-wheeled vehicle carrying the instrument apparatus of embodiment of this invention. Sectional drawing of the meter apparatus of the embodiment. Sectional drawing of the instrument apparatus of other embodiment of this invention.

  FIG. 1 shows the basic configuration of the present invention, and will be described by taking a two-wheeled instrument device as a moving body as an example.

  The two-wheeled vehicle 1 includes a frame 2 made of metal such as aluminum, an internal combustion engine (engine) 3 that uses gasoline as fuel, a fuel tank 4 that stores gasoline, a seat 5 on which a driver of the two-wheeled vehicle 1 sits, and a front wheel 6. And two front forks 7 that rotatably hold the front wheel 6, an instrument device 8, and a rotating cable 9 that transmits the rotation of the front wheel 6 to the instrument device 8. The engine 3, the fuel tank 4, and the seat 5 are attached to the frame 2, and the two front forks 7 are attached to the frame 2 so as to be steerable to the left and right.

  Next, the instrument device 8 will be described with reference to FIG. The instrument device 8 includes a speedometer 10 that displays the speed of the two-wheeled vehicle 1, a liquid crystal display 11 that displays a travel distance of the two-wheeled vehicle 1, and the first electrically connected to the speedometer 10 and the liquid crystal display 11. A circuit board 12a, a case 13 that accommodates the speedometer 10, the liquid crystal display 11 and the first circuit board 12a, and a detected rotation that rotates together with the rotating cable 9 that transmits the rotation of the front wheel, which is the rotation of the vehicle speed. A second circuit board 12b different from the first circuit board 12a on which the magnet 14 which is a body and the Hall IC 15 which is a detection unit for detecting the rotation of the magnet 14 are arranged; And a shielding part 50 to be arranged. The magnet 14 and the Hall IC 15 are accommodated by a cover 40. Reference numeral 16 denotes a dial, and reference numeral 17 denotes a control unit that controls the speedometer 10 and the liquid crystal display 11.

  The speedometer 10 is a pointer-type meter provided with a pointer 18. The speedometer 10 includes, in addition to the pointer 18, a dial plate 16 having scales and characters (not shown) indicated by the pointer 18, and an instrument body 19 that rotationally drives the pointer 18.

  The dial 16 includes a through hole 20 and a window portion 21. The through-hole 20 passes through the rotary shaft 22 that connects the pointer 18 and the instrument body 19.

  The instrument main body 19 includes a cross coil instrument main body, a stepping motor, and the like, and is driven by a drive process of the control unit 17.

  The liquid crystal display 11 may display the remaining fuel amount, the engine coolant temperature, the time, and the like in addition to the travel distance described above. The liquid crystal display 11 includes a liquid crystal display element 23, a support 24 that holds the liquid crystal display element 23, and a wiring member 25 that electrically connects the liquid crystal display element 23 and the first circuit board 12a. . Reference numeral 26 denotes a light source that illuminates the liquid crystal display element 23 from behind, and for example, a light emitting diode is preferable.

  The support 24 is made of a white synthetic resin and has a box shape to support the liquid crystal display element 23 and to form a space for making the light of the light emitting diode 26 uniform.

  The wiring member 25 has conductivity such as conductive rubber. The wiring member 25 supplies an electric signal from the first circuit board 12 to the liquid crystal display element 23.

  The liquid crystal control line 121 is wired on the surface of the first circuit board 12a, one of which is electrically connected to the wiring member 25 and the other is electrically connected to the control unit 17 provided on the first circuit board 12a. To do.

  The case 13 includes a back case 13a and a front cover 13b. The back case 13a and the front cover 13b are assembled so as to perform waterproof and dustproof functions for a motorcycle. In addition, it is not a complete sealing structure, and it is possible to ventilate the air inside and outside the case 13 by providing a filter (not shown) that does not transmit water but transmits gas. The back case 13 a does not transmit light, and is made of, for example, black synthetic resin, and forms the back side of the instrument device 8. The front cover 13b is made of a synthetic resin that transmits light, and is colorless in this embodiment. The front cover 13 b forms the front side of the instrument device 8.

  The magnet 14 has a disk shape, and a rotating shaft 28 passes through the center thereof. The magnet 14 rotates with the rotating shaft 28. The magnet 14 is magnetized, and a plurality of N poles and S poles are provided in the radial direction around the rotation center. In the present embodiment, the N pole and the S pole are combined to provide eight magnetic poles.

  The rotary shaft 28 is made of metal, and is rotatably supported by the back case 13a by a bearing 29. A recess 28a is provided on the side of the rotating shaft 28 opposite to the side on which the magnet 14 is provided. The end 9a of the rotary cable 9 is inserted into the recess 28a. The recess 28a has a quadrangular cross-sectional shape in the direction perpendicular to the longitudinal direction, and the end 9a inserted into the recess 28a also has a shape that matches the recess 28a. The rotation of the rotary cable 9 is transmitted to the rotary shaft 28, and the rotary shaft 28 rotates. The bearing 29 is also made of metal and has a cylindrical shape. The bearing 29 includes a groove 30 on the outer periphery, and the back case 13a is fitted in the groove 30 and the bearing 29 is fixed to the back case 13a. Reference numeral 31 denotes a retaining ring which has a metal donut shape and prevents the rotating shaft 28 from coming off the bearing 29.

  The Hall IC 15 serving as a detection unit is mounted on the second circuit board 12b and is electrically connected to a wiring pattern (not shown) provided on the second circuit board 12b. The Hall IC 15 includes a Hall element 15a and a protective portion 15b made of a synthetic resin. The protection unit 15b covers the hall element 15a in order to protect the hall element 15a. The Hall element 15a is a kind of sensor using a semiconductor and detects magnetism. In this embodiment, the rotation of the magnet 14 is detected by detecting the change in the magnetic field accompanying the rotation of the magnet 14.

  The control unit 17 is an integrated circuit such as an IC, is mounted on the first circuit board 12a, and is electrically connected to the liquid crystal control line 121 provided on the first circuit board 12a. The control unit 17 includes a circuit unit 17a that is a main unit and a protection unit 17b that protects the circuit unit 17a. The protection unit 17b covers the circuit unit 17a in order to protect the circuit unit 17a.

  The cover 40 is a metal cup-shaped enclosure member, and the rotation shaft 28 passes through the center thereof. The cover 40 has an opening composed of a disc-shaped bottom and a cylindrical standing wall. The cover 40 is held on the rotation shaft 28. The cover 40 is a magnetic metal that attenuates the magnetic field from the magnet 14, and prevents malfunction of the speedometer 10 due to magnetic interference from the magnet 14 to the instrument body 19. The cover 40 accommodates the magnet 14 and the Hall IC 15 inside thereof.

  Connectors 60 and 61 are disposed on the surface (front surface) of the first circuit board 12a on which the liquid crystal display 11 is disposed and the surface (rear surface) of the second circuit board 12b on the magnet 14 side, respectively. , 61 is connected to a flexible connection member 70 such as a flexible printed wiring board.

  Further, a shielding part 50 made of a metal plate material is arranged on the magnet 14 side of the second circuit board 12b. The shielding unit 50 shields the magnetic field generated from the magnet 14 from affecting the speedometer 10 and the like. The shielding unit 50 is disposed on the back surface side of the second circuit board 12b, for example, using an adhesive or the like with a ground pattern 122 described later interposed therebetween. The shielding part 50 has an opening 51 cut out so that the Hall IC 15 is not interfered with.

  The first circuit board 12a and the second circuit board 12b are electrically connected to each other by connecting a flexible connecting member 70 to the connectors 60 and 61 disposed on the respective surfaces. The connector 60 in this embodiment is disposed on the dial 16 side (front surface side) of the first circuit board 12a, and the connector 61 is disposed on the magnet 14 side (back surface side) of the second circuit board 12b. .

  A ground pattern 122 is formed on the second circuit board 12b. The ground pattern 122 allows static electricity to escape from the cover 40 to the ground pattern 122 so that static electricity is not induced to the liquid crystal control line 121 on the first circuit board 12a on which the speedometer 10 and the liquid crystal display 11 are disposed. Is for. In addition, the ground pattern 122 is preferably disposed on the back surface of the second circuit board 12b and between the shielding portion 50 and having the same size as the shielding portion 50. Moreover, the shielding part 50 and the cover 40 (the front-end | tip of an upright wall) have a some clearance in the location which mutually opposes. The shielding part 50 should not be in contact with the cover 40 and should face at least a part of the cover 40.

  As another example, an example will be described in which the shielding unit 50 is disposed on the side opposite to the magnet 14 side of the second circuit board 12b. As shown in FIG. 3, the shielding part 50 is disposed on the front surface side of the second circuit board 12b, and the Hall IC 15 and the ground pattern 122 are disposed on the back surface side. The shielding unit 50 is disposed on the surface side of the second circuit board 12b using, for example, an adhesive. The ground pattern 122 is formed on the back surface of the second circuit board 12b with a gap at a location facing the cover 40 (the tip of the standing wall). The ground pattern 122 only needs to face at least a part of the cover 40 so as not to contact the cover 40 and to have a slight gap. The size and shape of the ground pattern 122 and the ground pattern 122 from the cover 40 to the ground pattern 122 are sufficient. The gap can be changed as appropriate.

  As described above, the display 10 that displays the traveling state of the vehicle, the first circuit board 12a that is electrically connected to the display 10, and the case 13 that houses the display 10 and the first circuit board 12a. And a magnet 14 that rotates together with the rotating cable 9 that transmits the rotation of the vehicle speed, and a Hall IC 15 that detects the rotation of the object to be detected, and is arranged so as to face the first circuit board 12a. The second circuit board 12b and the Hall IC 15 are provided on the second circuit board 12b, and has a cover 40 for accommodating the magnet 14 and the Hall IC 15, and is a shielding portion disposed on the second circuit board 12b. 50, and the first circuit board 12a and the second circuit board 12b are connected by a connecting member 30 having flexibility, so that the arrangement of components on the circuit board 12 can be reduced. Degrees it is possible to provide an instrument device with improved.

  Further, since the shielding part 50 is arranged on the magnet 14 side of the second circuit board 12b, the first circuit board 12a and the second circuit board 12b can be arranged close to each other even from the magnet 14. Can be shielded so as not to affect the second circuit board 12b, and an instrument device can be provided in which the degree of freedom of arrangement of components on the circuit board 12 is improved.

  Further, since the shielding part 50 has the opening 51 for exposing the Hall IC 15, even when the shielding part 50 is arranged on the magnet 14 side of the second circuit board 12 b, the Hall IC 15. Therefore, it is possible to arrange the shielding portion 50 and provide an instrument device with an improved degree of freedom in arranging components on the circuit board 12.

  Further, since the shielding part 50 is arranged on the side opposite to the magnet 14 side of the second circuit board 12b, the first circuit board 12a and the second circuit board 12b can be arranged close to each other. The magnetic field from the magnet 14 can be shielded so as not to affect the second circuit board 12b, and the first circuit board 12a and the second circuit board 12b can be arranged apart from each other. It is possible to provide an instrument device with an improved degree of freedom in arrangement.

  In this embodiment, the cover 40 is held on the rotary shaft 28 and rotated. However, the cover 40 is not held on the rotary shaft 28, and the cover 40 and the bearing 29 are integrated, and the shielding portion 50 is used. Alternatively, it may be a structure that is placed on the second circuit board 12b.

8 Instrument device 9 Rotating cable 10 Speedometer (indicator)
11 Liquid crystal display (display)
12a First circuit board 12b Second circuit board 13 Case 14 Magnet (detected body)
15 Hall IC (detector)
15a Hall element 17 Control part 40 Cover 50 Shielding part 51 Opening part 60, 61 Connector 70 Connection member 121 Liquid crystal control line 122 Ground pattern

An instrument device according to the present invention includes a display that displays a traveling state of a vehicle, a first circuit board that is electrically connected to the display, and a case that houses the display and the first circuit board. In a meter device comprising: a detected object that rotates together with a rotating cable that transmits rotation of a vehicle speed; and a detection unit that detects the rotation of the detected object, a second that is different from the first circuit board a circuit board, prior Symbol a cover for housing the said detector and the object to be detected, the second, further comprising a shielding portion disposed on a circuit board of a first circuit board and the second The circuit board is connected by a connecting member.

Claims (4)

An indicator that displays the driving status of the vehicle;
A first circuit board electrically connected to the display;
A case for housing the indicator and the first circuit board;
A detected object that rotates together with a rotating cable that transmits rotation of the vehicle speed;
In a measuring instrument comprising a detection unit that detects rotation of the detected object,
A second circuit board different from the first circuit board;
The detection unit is provided on the second circuit board, and has a cover that accommodates the detection target and the detection unit,
A shielding portion disposed on the second circuit board;
The first circuit board and the second circuit board are connected by a connecting member. The instrument device according to claim 1, wherein the shielding portion is disposed on the detected body side of the second circuit board. The instrument device according to claim 2, wherein the shielding unit has an opening for exposing the detection unit. The instrument device according to claim 1, wherein the shielding portion is disposed on a side opposite to the detected body side of the second circuit board.

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