JPH0743654Y2 - Eddy current indicator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an eddy current indicator, and more particularly to a reinforcement and vibration isolation device for an eddy current indicator for a speedometer of a vehicle or the like.

[Conventional technology]

Generally, in an eddy current type indicator, a rotating shaft is borne by a bottom wall of a U-shaped frame whose both ends are open via a bearing member, and a magnet is fixed to the upper end of the rotating shaft. It is formed so that rotation from an intended rotating portion such as a vehicle mission or a wheel is transmitted via a flexible cable. A plate is installed on both ends of the U-shaped frame on the opening side, and an upper end side of a pointer shaft is pivotally supported by the plate, and an induction member is fixed to the lower end side of the U-shaped frame in correspondence with a magnet fixed to the rotary shaft. ing.

Therefore, the rotation from the vehicle is transmitted to the rotary shaft via the flexible cable, the magnet is rotated together with the rotary shaft, the eddy current action generated by the rotary motion of the magnet is guided to the induction member, and the rotation of the rotary shaft is interlocked. The pointer shaft side is operated.

The bearing member is composed of a tubular boss portion made of zinc die-casting and a bearing portion for rotatably supporting the rotating shaft, and the lower end side of the tubular boss has a screw thread or the like that can be connected and fixed to a nut portion on the flexible cable side. The cable coupling part is formed and a fixing part for fixing to the frame side is formed on the upper end side of the tubular boss.The fixing part is caulked and fixed toward the frame, and the bearing member is fixed to the frame. There is.

[Problems to be solved by the device]

Therefore, the bearing member is fixed to the frame only by caulking and fixing by the fixing portion formed on the upper end side of the cylindrical boss portion in the central portion of the bottom wall of the frame, and in the vicinity of both side walls erected from the bottom wall. Since there is no fixing means in the bottom wall portion of the above and it has a free end, it may vibrate and float due to the vibration of a vehicle or the like. The floating of the bottom wall near the both side walls causes resonance of both side wall portions of the frame, and this resonance may cause vibration to be transmitted to the pointer shaft side through the plate and the indication of the pointer may fluctuate. In addition, in a two-wheeled vehicle equipped with such an eddy current type indicator, a flexible cable is routed along the vehicle body, and when the vehicle falls down or comes into contact with an external property, that is, by an external force. If the bearing member side of the indicator instrument connected to the flexible cable is impacted by the applied tension, the frame part that fixes the boss may be deformed and the indicator instrument may become inoperable. The eddy current type indicator of Japanese Utility Model Laid-Open No. 59-49965 is known as a means for doing this. However, although this eddy current indicating instrument can alleviate external impact, a mechanism for suppressing the frame resonance phenomenon has not been solved yet.

The object of the present invention is to disperse the impact applied to the boss portion from the outside of the instrument to the bottom wall by the reinforcing plate without locally concentrating the impact on the fixing portion between the frame and the bearing member,
In addition, the present invention provides an eddy current type indicator that can suppress the floating of the bottom wall of the frame due to vibration and can suppress the resonance of both side walls.

[Means for Solving the Problems]

In the present invention, a plate is installed at the open end of a U-shaped frame to form a frame body of an indicating instrument, and a rotary shaft is rotatably supported by a bearing member at the center of the bottom wall of the frame. A magnet is provided on the upper end of the rotary shaft, at least the upper end side of the pointer shaft is rotatably supported on the plate, and a guide member is disposed below the pointer shaft with a small clearance between the magnet and the guide shaft. In an eddy current indicator instrument having a pointer fixed to the upper end and rotating the induction member by the action of an eddy current generated by the rotational movement of the magnet, the bearing member has a reinforcement extending in a plane along the bottom wall of the frame. The plate is integrally formed, and projecting portions are formed on the surface portions of the reinforcing plate near both side walls of the frame, and the upper end portion of the bearing member is caulked and fixed to the central portion of the bottom wall of the frame. With the above reinforcing plate Each projecting part provided is fixed by crimping to the bottom wall located near both side walls of the frame, so that the impact from the outside of the instrument is locally concentrated on the fixing part between the boss part and the frame. Instead, it is dispersed on the frame bottom wall, and the mounting strength between the frame bottom wall and the reinforcing plate is increased to increase the strength of the entire frame structure, thereby suppressing the resonance action from the lateral direction that is applied when the pointer is operated. It is intended to keep the instruction of the guide good.

〔Example〕

1 and 2 show a first embodiment of the present invention, in which a rotary shaft 4 is rotated through a bearing member 3 at the center of a bottom wall 2 of an instrument frame 1 bent in a U shape. The rotating shaft 4 is freely supported and supported, and a magnet 5 is fixed to the upper end of the rotating shaft 4.
Is a flexible cable (not shown) for rotation from the vehicle
It is formed so as to be rotationally driven via. The instrument frame 1 is provided on the side wall 1a, 1b opening side of the instrument frame 1 described above.
A plate 6 forming a part of the plate 6 is erected and fixed by a caulking portion 7, and an upper bearing portion 8 is formed at the center of the plate 6 and a lower bearing portion 9 is formed at the center of the upper end of the rotary shaft 4. The pointer shaft 10 is supported by the bearings 8 and 9. Further, a guide member 11 is provided on the lower end side of the pointer shaft 10 so as to face the magnet 5 fixed to the rotary shaft 4 with a small clearance, and a pointer 12 is press-fitted and fixed on the upper end of the pointer shaft. An inner end of a mustache spring 13 is fixed at a substantially central position of 10, and an outer end thereof is fixed to a beard holder 14 provided on the instrument frame 1 side, and the induction member 11 is generated by an eddy current action generated by the rotational movement of the magnet 5. The elastic force of the mustache spring 13 is balanced and the rotation instruction is given.

Reference numeral 15 is a dial plate having a surface fixed to the plate 6 with screws or the like and a display portion such as a scale or a number.

The bearing member 3 is formed on a cylindrical boss portion 16 made of zinc die casting or the like that is directly fixed to the instrument frame 1 side and a bearing portion 17 made of a sintered alloy that supports the rotary shaft 4, On the lower end side of the cylindrical boss portion 16, a cable coupling portion 18 that is connected and fixed to the nut portion of the flexible cable is formed, and on the upper end portion of the cylindrical boss portion 16, the central portion of the bottom wall 2 on the instrument frame 1 side. A fixing portion 19 for crimping and fixing is formed, and a reinforcing plate 20 that planarly extends along the bottom wall 2 of the instrument frame 1 is integrally formed below the fixing portion 19 so as to project. Further, the reinforcing plate 20 is formed with a projecting portion 21 which is caulked and fixed to the bottom wall 2 in the vicinity of the side walls 1a and 1b of the instrument frame 1. The projecting portion 21 and the tubular boss portion are formed.
By fixing the fixing portions 19 of the 16 to the bottom wall 2 of the frame 1 by caulking, the bottom wall 2 of the frame 1 and the reinforcing plate 20 are held in planar contact with each other and fixed at positions near both side walls 1a, 1b. ing.

Therefore, the fixing portion 19 of the bearing member 3 is caulked and fixed to the central portion of the bottom wall 2 of the frame 1, and the protruding portions 21 provided on the reinforcing plate 20 are located near both side walls 1a and 1b of the frame. The bottom wall 2 and the reinforcing plate are fixed to the bottom wall 2 by caulking and fixing.
20 and 20 are integrally fixed, and each side wall 1 of the frame 1
Since the protruding portion 21 in the vicinity of a and 1b is fixed to the bottom wall 2 by caulking, the bottom wall 2 can be prevented from rising and the resonance phenomenon of the side walls 1a and 1b due to this lifting can be suppressed. The differential of the pointer 12 can be kept more stable than that of. In addition, when the motorcycle falls,
External pressure is directly applied to the flexible cable, and this external pressure is transmitted to the bearing member 3 connected to the flexible cable,
The reinforcing plate 20 formed integrally with the tubular boss portion 16 of the bearing member 3 even if an impact force is applied in the direction orthogonal to the axial direction.
Thus, the force applied to the bottom wall 2 of the instrument frame 1 can be dispersed, so that the bending of the fixed position and the deformation of the instrument frame 1 due to the impact of the bearing member 3 on the instrument frame 1 can be prevented.

FIG. 3 shows a second embodiment, in which a rotary shaft 33 is mounted on a bottom wall 31 of an instrument frame 30 formed in a U shape via a bearing member 32.
Is rotatably supported, and a magnet 34 is fixed to the upper end of the rotating shaft 33. The side wall of the instrument frame 30
A plate 35 is erected and fixed on the opening side of 30a, 30b, and an upper bearing portion 36 is formed at the center of the plate 35 and a lower bearing 37 is formed at the center of the upper end of the rotary shaft 33.
A pointer shaft 38 is pivotally supported by 36 and 37.

A guide member 39 is provided at the lower end of the pointer shaft 38 so as to face the magnet 34 fixed to the rotary shaft 33 with a small clearance.
, And the needle 40 is press-fitted and fixed at the upper end, and the inner end of the beard spring 41 is fixed at a substantially central position of the pointer shaft 38, and the outer end thereof is fixed to the beard holder 42 provided on the instrument frame 30 side.
The action of eddy current generated by the rotational movement of the magnet 34 balances the elastic force of the guide member 39 and the elastic force of the beard spring 41 to instruct the rotation.

Further, the bearing member 32 is formed by a tubular boss portion 43 that is directly fixed to the instrument frame 30 side and a bearing portion 44 that pivotally supports the rotating shaft 33, and the tubular boss portion 43 is attached to the instrument case 45. Drive on the side of the drive shaft 47 which is inserted into the hole 46 and which supports the drive shaft 47 which is orthogonal to the rotary shaft 33 and which is connected to a flexible cable (not shown) and which connects both shafts 33, 47 to each other. Gear box with built-in gear 48 and driven gear 49 on the rotating shaft 33 side
50 is fitted into the cylindrical boss portion 43 from the outside of the instrument case 45. Further, at the upper end of the cylindrical boss portion 43, a fixing portion 51 for crimping and fixing to the central portion of the bottom wall 31 of the instrument frame 30 is formed, and below the fixing portion 51, the bottom wall of the instrument frame 30 is formed. A reinforcing plate 52 extending in a plane along 31 is integrally formed to project. Also, the reinforcing plate 52 has the above instrument frame.
A bottom wall 31 in the vicinity of each side wall 30a, 30b of 30 is formed with a protruding portion 53 for caulking and fixing, and each side wall 30a, 30b is formed.
A screw 54 for fixing the gear box 50, the instrument case 45 and the reinforcing plate 52 is screwed to the bottom wall 31 in the vicinity of the bottom wall 31 and the reinforcing plate 52 in the vicinity of the side walls 30a and 30b. Is the protruding part 5
It is fixed by the caulking fixed part by 3 and the screwing fixed part by the screw 54, and by fixing the fixing part 51 by caulking at the substantially central position of the bottom wall 31,
The reinforcing plate 52 and the bottom wall 31 of the instrument frame 30 can be integrally fixed, and the same operational effect as the above-described first embodiment can be obtained.

In each embodiment, the protruding portions 21 and 53 are formed on the side walls 1a, 1b and 3 respectively.
It is only necessary to fix the frame bottom walls 2 and 31 close to 0a and 30b and the reinforcing plates 20 and 52, and the shape, size and number of them may be appropriately set.

[Effect of device]

A plate is installed at the open end of the frame formed in a U shape to form a frame body of the indicating instrument, and a rotary shaft is rotatably supported by a bearing member in the center of the bottom wall of the frame. Is provided at the upper end of the pointer shaft, at least the upper end side of the pointer shaft is rotatably supported by the plate, and a guide member is disposed below the pointer shaft with a small clearance between the magnet and the guide shaft. And an eddy current indicator instrument that rotates the induction member by the action of an eddy current generated by the rotational movement of the magnet.In the bearing member, a reinforcing plate that extends in a plane along the bottom wall of the frame is integrated. Along with the formation, projecting portions are respectively formed on the surface portions of the reinforcing plate close to both side walls of the frame, and the upper end portion of the bearing member is caulked and fixed to the central portion of the bottom wall of the frame, and Set on the reinforcing plate By caulking and fixing the projecting portion to the bottom wall located in the vicinity of both side walls of the frame, the bottom wall of the frame and the reinforcing plate can be integrally fixed to suppress the resonance action, and the bearing due to impact can be suppressed. It is possible to prevent the bending of the fixed position of the portion and the deformation of the frame, and to stabilize the indication of the pointer.

[Brief description of drawings]

1 and 2 show the first embodiment, FIG. 1 is an overall sectional view, FIG. 2 is an overall perspective view, and FIG. 3 is an overall sectional view of the second embodiment. 1,30 …… Instrument frame 1a, 1b, 30a, 30b …… Side wall 2,31 …… Bottom wall, 3,32 …… Bearing member 4,33 …… Rotating shaft, 5,34 …… Magnet 6,35… … Plate, 8,36 …… Upper bearing part 9,37 …… Lower bearing part, 10,38 …… Indicator shaft 11,39 …… Induction member, 12,40 …… Indicator 20,52 …… Reinforcing plate, 21,53 …… Projection part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliographic references Sho 59-49965 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A plate is installed at an open end of a U-shaped frame to form a frame body of an indicating instrument, and a rotary shaft is axially supported by a bearing member at a central portion of a bottom wall of the frame. Then
A magnet is provided on the upper end of the rotary shaft, at least the upper end side of the pointer shaft is rotatably supported on the plate, and a guide member arranged with a small clearance with the magnet is provided below the pointer shaft. In an eddy current indicator instrument having a pointer fixed to the upper end and rotating the induction member by the action of an eddy current generated by the rotational movement of the magnet, the bearing member has a reinforcement extending in a plane along the bottom wall of the frame. The plate is integrally formed, and projecting portions are formed on the surface portions of the reinforcing plate near both side walls of the frame, and the upper end portion of the bearing member is caulked and fixed to the central portion of the bottom wall of the frame. At the same time, the eddy current indicator instrument is characterized in that the respective protruding portions provided on the reinforcing plate are fixed by swaging to the bottom wall located near both side walls of the frame.