JP2001264124A - Measuring instrument for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring instrument for vehicles which enables mounting of an internal machine on a fixing member without requiring a mounting member. SOLUTION: In the measuring instrument for vehicles which is provided with an internal machine 50 to transmit the rotation of a rotor 56 to a pointer shaft 57 through a plurality of gears 58 and a fixing member 40 on which the internal machine 50 is mounted to drive a pointer 20 mounted at the tip of a pointer shaft 57 protruded from case members 51 and 52 of the internal machine 50, the internal machine 50 is provided with shaft members 53a and b which rotatably support at least each of a gear 58 or the rotor 56 while each one end thereof is protruded from one side thereof facing the fixing member 40 and the fixing member 40 has through holes 40a and b which each one end of the protruded shaft members 53a and b pierce. The one end of the shaft members 53a and b protruding from the through holes 40a and b is fixed on the fixing member 40 and the internal machine 50 is mounted on the fixing member 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument system for a vehicle, and more particularly, to an internal unit for transmitting rotation of a rotor to a pointer shaft through a plurality of gears, and a fixing member to which the internal unit is attached. A vehicle instrument device for driving a pointer attached to a tip of the pointer shaft protruding from a case member of the inner machine.

[0002]

2. Description of the Related Art Generally, a vehicle is equipped with a vehicle instrument for displaying measured values such as a vehicle speed and an engine speed. This instrument system for vehicles has scales and numbers on the surface,
A dial provided with indices such as characters or symbols, a pointer disposed on the front of the dial, an inner unit for driving the pointer according to the measured amount, and a circuit pattern provided for fixing the inner unit And a wiring board (corresponding to a fixing member).

[0003]

However, in the conventional instrument system for a vehicle, the internal unit is attached to the wiring board with an attachment member such as a screw or a screw, so that the number of parts used in the instrument system for the vehicle increases. For example, when the number of inner units used in a vehicle instrument device increases, the number of mounting members increases accordingly. Also, when a plurality of plate-shaped mounting pieces are provided on the mounting surface of the inner machine with the fixing member, and the tip of the mounting piece protruding from the fixing member is bent to mount the inner machine to the fixing member, the components constituting the inner machine are provided. There was a problem that the score increased.

Accordingly, the present invention has been made in view of the above-described problems,
It is an object of the present invention to provide a vehicle instrument device that can attach an inner machine to a fixed member without requiring an attachment member.

[0005]

According to a first aspect of the present invention, there is provided an in-vehicle instrument for transmitting rotation of a rotor to a pointer shaft through a plurality of gears. A fixing member to which the inner machine is attached,
A vehicle instrument device that drives a pointer attached to a tip of the pointer shaft protruding from a case member of the inner unit, wherein the inner unit rotatably supports at least one of the rotor or the gear, A shaft member having one end protruding from one side surface of the case member facing the fixing member, the fixing member including a through hole through which one end of the protruding shaft member penetrates, and the shaft member protruding from the through hole; Is fixed to the fixing member, and the inner machine is attached to the fixing member.

According to the vehicle instrument device of the present invention, the shaft member is provided in the inner machine with one end protruding from one side surface of the case member facing the fixed member. Then, one end of the shaft member protruding from the inner machine is protruded from the through hole of the fixing member, and the inner machine is mounted on the fixing member by fixing one end of the protruding shaft member to the fixing member.

Accordingly, one end of the shaft member supporting the rotor and the gear is protruded from the case member of the inner machine, and one end of the protruded shaft member is protruded from the through hole of the fixed member to be fixed to the fixed member. Since the machine is mounted on the fixing member, mounting members such as screws and screws are not required, and the number of parts used in the vehicle instrument device can be reduced. Further, since it is not necessary to provide a screw hole for screwing in the inner machine, the shape of the inner machine can be simplified. Also,
The existing shaft member can be made to protrude from the inner machine, and a through hole through which the protruded shaft member penetrates can be provided only by fixing the fixing member. Need not be provided, and the number of components constituting the internal machine does not increase. Therefore, it is possible to provide a vehicle instrument device in which the inner machine can be attached to the fixed member without requiring an attachment member.

According to a second aspect of the present invention, there is provided a vehicle instrument apparatus as set forth in the first aspect, wherein the one end of the shaft member is in contact with an outer wall of the case member at the other end of the shaft member. It is characterized in that a detachment preventing portion for restricting the movement of the shaft member in a direction is provided.

According to the second aspect of the present invention, the slip-off preventing portion provided at the other end of the shaft member of the inner unit contacts the outer wall of the case member of the inner unit. The movement of the member in one end direction is restricted. Therefore, the movement of the shaft member in one end direction is regulated by fixing the stopper member of the shaft member in contact with the outer wall of the case member of the inner machine, thereby preventing the movement of the inner machine attached to the fixing member. can do. Therefore, the accuracy of attaching the inner machine to the fixing member can be further improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle instrument device according to the present invention will be described below with reference to FIGS.

FIG. 1 is an exploded perspective view of the vehicle instrument device according to the present invention, FIG. 2 is an enlarged perspective view of the inner machine of FIG. 1, and FIG. 3 is an exploded perspective view of FIG. FIG. 4 is an enlarged cross-sectional view of the inner machine portion taken along the line AA in FIG.

In FIG. 1, reference numeral 1 denotes a vehicle instrument device mounted on a vehicle. The vehicle instrument device 1 has a scale indicating a vehicle speed, an engine speed, and the like, and an index such as a number, a character or a symbol on a surface thereof. The dial 10 has a dial 10 disposed at a position indicated by the arrow. In front of each dial 10, a pointer 2
0 is arranged. On the back side of the dial 10, light transmitted through a scale or an index of the dial 10, light guided inside the hands 20 to shine the hands 20, or the like is transmitted from an illumination light source (not shown) to the dial. 10, a light guide plate 30 for guiding light to the pointer 20 is arranged.

A wiring board 40 provided with a wiring pattern is arranged on the back side of the light guide plate 30. On the back side of the wiring board 40, the pointer 20 is rotated according to the measured amount. Machine 50 is installed. Then, the dial 10, the hands 20, the light guide plate 30, the wiring board 40, and the inner unit 50 described above.
Are integrally assembled and attached to the case 60.
The vehicle instrument device 1 further includes a dial facing the dial 10 and a pointer 20 on the dial 10.
Has a protective cover (both not shown) for protecting the device.

As shown in FIG. 2 and FIG.
Has an upper case 51 and a lower case 52 formed of synthetic resin or the like. The upper case 51 and the lower case 52 are formed by a pair of fitting holes 51 a of the upper case 51.
The fitting projection 52 of the lower case 52 corresponding to each
a and a pair of engaging holes 51b of the upper case 51 are fixed by engaging with engaging projections 52b provided on the outer wall of the lower case 52.

On the upper surface of the upper case 51, there are provided a convex portion 51c having a through hole through which a pointer shaft 57 to be described later penetrates, and through holes 51d and 51e through which a rotor shaft member 53a and a gear shaft member 53b pass. Have been. The lower case 52 has a bearing 52c that rotatably fits a pointer shaft 57 described later, a first through hole 52d through which the rotor shaft member 53a penetrates, and a second through hole through which the gear shaft member 53b penetrates. It has two through holes 52e.

The shaft member 53a for the rotor and the shaft member 53b for the gear are formed such that one end thereof protrudes from the upper case 51 when the inner machine 50 is assembled to the wiring board 40. By making the portion fixed to the lower case 52 a knurl, the rotor shaft member 53a is formed.
In addition, the gear shaft member 53b is prevented from rotating. Further, the other end of the gear shaft member 53b is
In order to prevent the gear shaft member 53b from moving out of the lower case 52, a disc-shaped slip-off preventing portion 53b1 is provided to restrict the movement of the gear shaft member 53b in one end direction.

Reference numeral 54 denotes a stator.
For example, a metal plate such as a silicon steel plate is laminated and formed in a frame shape corresponding to the shape of the lower case 52. The stator 54 has first and second extending portions 54a, 54b.
And a hole 54c through which the gear shaft member 53b passes.

Reference numeral 55 denotes a coil mounted on the extension portion 54a of the stator 54. The coil 55 is formed by winding a copper wire 55b around a bobbin 55a formed of a synthetic resin such as plastic, and pressing a terminal 55c pressed into the bobbin 55a. , 55d
In addition, both ends of the copper wire 55b, that is, the winding start and the winding end are electrically connected by means of soldering or the like.

Reference numeral 56 denotes a rotor serving as a drive source of the inner unit 50. The rotor 56 is formed of a plastic magnet and has a through hole (not shown) through which the rotor shaft member 53a passes. A rotor gear 56a having a through hole connected to the through hole of the rotor 56 is mounted on the upper surface of the rotor 56.

Reference numeral 57 denotes a pointer shaft to which the pointer 20 is attached at the tip. The pointer shaft 57 is formed of a metal member. A pointer gear 57a made of, for example, plastic is fixed to the pointer shaft 20 by press-fitting. I have. One end of the pointer shaft 57 protrudes from the protrusion 51 c of the upper case 51, and the other end is fitted to the bearing 52 c of the lower case 52.

Reference numeral 58 denotes a gear for transmitting the rotation of the rotor 56 to the pointer shaft 57. The gear 58 is made of, for example, a synthetic resin such as plastic, and is engaged with a large gear meshing with the rotor gear 56a of the rotor 56, with the pointer gear 57a, and A small gear smaller in diameter than the large gear is integrally formed.

Next, the wiring board (fixing member) 40 of the inner machine 50
A description will be given of attachment to the camera. First, the coil 55 is attached to each of the first and second extension portions 54a and 54b of the stator 54, and the rotor shaft member 53a and the rotor shaft member 53a are respectively inserted from the first through hole 52d and the second through hole 52e of the lower case 52. The gear shaft member 53b is penetrated and fixed. At this time, the slip-off preventing portion 53b1 of the gear shaft member 53b is
It is fixed so as to be in contact with the outer wall of the lower case member 52. Then, the gear shaft member 53 b is positioned by penetrating the hole 54 a of the stator 54, and the stator 54 is positioned in the lower case 5.
Attach to 2.

The rotor 56 is rotatably fitted to the rotor shaft member 53a, and the pointer shaft 57 to which the pointer gear 57a is fixed is rotatably mounted on the bearing 52c of the lower case 52.
Fits. The large gear of the gear 58 meshes with the rotor gear 56 a of the rotor 56, and the small gear is the pointer gear 5.
7a so as to mesh with the gear shaft member 53b.
Rotatably attached to

The tip of the pointer shaft 57 is projected from the projection 51c of the upper case 51, one end of the rotor shaft member 53a is inserted into the through hole 51d, and one end of the gear shaft member 53b is inserted into the through hole 51e.
From the terminals 55c, 55 of the coil 55.
d is projected from the through hole, the fitting projection 52a of the lower case 52 is fitted and positioned in the fitting hole 51a of the upper case 51, and the engaging hole 51b of the upper case 51 is
The upper case 51 and the lower case 52 are fixed by engaging with the second engaging projections 52b.

The wiring board 40 of the inner machine 50 thus formed
To the convex part 51 of the upper case 51 of the inner unit 50.
c, and a rotor shaft member 53 protruding from the upper case 51.
a, The gear shaft member 53b and the terminals 55c and 55d are passed through the respective predetermined through holes of the wiring board 40. Then, with the upper surface of the upper case 51 and the back surface of the wiring board 40 in contact with each other, the protruding rotor shaft member 53a, the gear shaft member 53b, and the terminals 55c and 55d are soldered on the surface of the wiring board 40. I do. The terminals 55c and 55d are electrically connected by soldering to the wiring board 40.

The inner machine 50 attached to the wiring board 40
The terminal 55 is provided through a wiring pattern provided on the wiring board 40.
c, 55 d, and the electric signal corresponding to the measured amount is supplied to the coil 55, whereby the rotation of the rotor 56 corresponding to the measured amount is transmitted to the pointer shaft 57 via the gear 58. The pointer 20 attached to the tip of the pointer shaft 57 is driven according to the measured amount.

As described above, the rotor shaft member 53
a and one end of each of the gear shaft members 53 b are provided in the inner machine 50 so as to protrude from one side surface of an upper case (corresponding to a case member) 51 facing the wiring board (corresponding to a fixing member) 40. The rotor shaft member 53 protruding from the inner unit 50
a and one end of each of the gear shaft members 53b are protruded from the through holes 40a and 40b of the wiring board 40, and one end of each of the protruding rotor shaft members 53a and the gear shaft members 53b is soldered to the wiring board 40. Then, the inner machine 50 is attached to the wiring board 40.

Accordingly, one end of the rotor shaft member 53a and the gear shaft member 53b supporting the rotor 56 and the gear 58 is made to protrude from the upper case (corresponding to a case member) 51 of the inner machine 50, and the protruding rotor One end of the shaft member 53a and the gear shaft member 53b is connected to a wiring board (corresponding to a fixing member) 4
By soldering to 0, since the inner machine 50 is attached to the wiring board 40, attachment members such as screws and screws can be omitted.

Since the inner unit 50 is attached to the wiring board 40 by one end of the rotor shaft member 53a and the gear shaft member 53b, the terminals 55c and 55d soldered to the wiring board 40 for electrical connection. Therefore, the occurrence of cracks in the soldered portion can be prevented.

Further, since it is not necessary to provide a screw hole or the like for screwing the inner unit 50, the shape of the inner unit 50 can be simplified. In addition, the existing rotor shaft member 53
a and the gear shaft member 53b can be protruded from the inner machine 50 and the wiring board 40 can be provided only by providing through holes 40a and 40b therethrough. There is no need to provide a new mounting member on the machine 50, and the number of components constituting the inner machine 50 does not increase.

Therefore, since the mounting member is not required, the number of parts in the vehicle instrument device 1 can be reduced as compared with the conventional case, and the cost can be reduced. In particular, as the number of inner units 50 used in the vehicle instrument device 1 increases, the degree of contribution to cost reduction can be improved.

Further, the pull-out preventing portion 5 of the gear shaft member 53b is provided.
By fixing the 3b1 in contact with the outer wall of the lower case 52 of the inner unit 50, the movement of the gear shaft member 53b in one end direction is restricted, so that the inner unit 50 attached to the wiring board 40 is prevented from moving. can do. Therefore, the mounting accuracy of the inner unit 50 to the lower case 52 can be further improved.

In the above-described embodiment, a case has been described in which only the gear shaft member 53b is provided with the slip-off preventing portion 53b1, but the present invention is not limited to this. It is also possible to provide a detachment prevention part at the end.

Further, in the above-described embodiment, the rotor gear 56a is formed integrally with the rotor 56, and the rotation of the rotor is controlled by the gear shaft member 53a via the rotor gear 56a.
However, the present invention is not limited to this. For example, an embodiment in which the outer peripheral surface of the rotor 56 is formed in a gear shape, and the rotor 56 and the rotor gear 56a are separately provided separately from each other. A shaft member is provided, and rotation of the rotor 56 is rotated by a belt pulley mechanism or the like.
Various other embodiments can be adopted, such as an embodiment for transmitting information to a user.

In the above-described embodiment, the inner machine 5
Although the wiring board 40 to which the inner unit 50 is attached has been described as a fixing member, the present invention is not limited to this, and the objects to which the inner unit 50 is attached are the dial 10, the light guide plate 30, and the case 60.
In such a case, the attachment target corresponds to the fixing member.

Further, in the above-described embodiment, the case where the inner unit 50 is attached to the wiring board 40 on the side surface from which the pointer shaft 57 protrudes has been described. However, the present invention is not limited to this. In the case where the fixing member is mounted on the side opposite to the side surface from which the pointer shaft 57 projects, it is possible to cope with this by making one end of the shaft member protrude from the opposite surface.

[0037]

As described above, according to the vehicle instrument system of the present invention, one end of the shaft member supporting the rotor and the gear is made to protrude from the case member of the inner machine. By fixing one end of the shaft member to the fixing member by protruding one end of the shaft member from the through hole of the fixing member, since the inner machine is attached to the fixing member, mounting members such as screws and screws are not required, and it is used for a vehicle instrument device. The number of parts can be reduced. Further, since it is not necessary to provide a screw hole for screwing in the inner machine, the shape of the inner machine can be simplified. In addition, since the existing shaft member can be protruded from the inner machine and a through hole through which the protruded shaft member penetrates can be provided only in the fixing member, it is possible to cope with the problem by adding a new hole to the inner machine for mounting on the fixing member. Since there is no need to provide a mounting member,
There is no increase in the number of parts constituting the internal machine. Therefore, an attachment member is not required, and the number of components in the vehicle instrument device can be reduced as compared with the related art, so that there is an effect that cost can be reduced. In particular, as the number of inner machines used in the vehicle instrument device increases, the degree of contribution to cost reduction can be improved.

According to the invention described in claim 2, according to claim 1
In addition to the effects of the invention described in (1), since the shaft member is prevented from coming off by being fixed in contact with the outer wall of the case member of the inner machine, the movement of the shaft member in one end direction is regulated, so that the shaft member is attached to the fixing member. It is possible to prevent the internal machine from moving. Therefore, there is an effect that the accuracy of attaching the inner machine to the fixing member can be further improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a vehicle instrument device according to the present invention.

FIG. 2 is an enlarged perspective view of the inner machine of FIG.

FIG. 3 is an exploded perspective view of FIG. 2;

FIG. 4 is an enlarged cross-sectional view of the inner unit in the direction of the arrow passing through line AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle instrument apparatus 20 Pointer 40 Wiring board (fixing member) 50 Inner unit 51 Upper case 52 Lower case 53a Rotor shaft member (shaft member) 53b Gear shaft member (shaft member) 56 Rotor 57 Pointer shaft 58 Gear

Claims (2)

[Claims] 1. An inner machine for transmitting rotation of a rotor to a pointer shaft via a plurality of gears, and a fixed member to which the inner machine is attached, the tip of the pointer shaft protruding from a case member of the inner machine. An instrument for a vehicle that drives a pointer attached to a vehicle member, wherein the inner unit rotatably supports at least one of the rotor or the gear, and one end of the case member facing one side of the fixed member. A fixing member provided with a through hole through which one end of the protruding shaft member penetrates, and an end of the shaft member protruding from the through hole fixed to the fixing member, Is mounted on the fixing member. 2. A detachment preventing portion is provided at the other end of the shaft member, which comes into contact with an outer wall of the case member and regulates movement of the shaft member in the one end direction.
2. The vehicle instrument device according to claim 1.