JP2006317409A - Instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an instrument for preventing an internal rotary device for rotating a pointer from being vibrated to an electrical wiring board. <P>SOLUTION: The instrument 1 comprises a dial 2; the pointer 3 that is rotated along the front of the dial 2; the electrical wiring board 4 that is arranged at the rear of the dial 2 and has an engagement hole 41; the internal rotary device 5 that has an engagement member 52 that is inserted into the engagement hole 41, is pressed against an engagement inner surface 41a of the engagement hole 41, and is engaged to the electrical wiring board 4, and rotates the pointer 3; and a constraint member that comes into contact with a contacting inner surface 41b that opposes an engagement inner surface 41a in the engagement hole 41 and is provided so that the engagement member 52 engaged to the electrical wiring board 4 is constrained to the printed wiring board 4, thus preventing the internal rotary device 5 from being vibrated to the electrical wiring board 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an instrument in which a turning inner unit for turning a pointer is attached to an electric wiring board.

  2. Description of the Related Art Conventionally, there is an instrument that engages an electric wiring board by inserting an engaging member formed in a rotating inner unit that rotates a pointer into an engaging hole formed in the electric wiring board. This is to attach the rotating inner unit to the electric wiring board by using the elastic force of the engaging member, and can easily attach the rotating inner unit to the electric wiring board as compared with the screw connection. is there. In addition, the terminal pin protruding from the rotating inner unit is inserted into the mounting hole (land hole) of the electric wiring board and soldered, thereby electrically connecting the rotating inner unit to the electric wiring board. .

  However, since the engaging member is inserted and fitted into the engaging hole, when the ambient temperature becomes low and the engaging member is thermally contracted, the fitting between the engaging member and the engaging hole is loosened and rattled. There was a problem.

  The present inventor has proposed an instrument that prevents the rotating internal unit attached to the electric wiring board from rattling with respect to the electric wiring board due to a change in ambient temperature in this type of instrument (Patent Document). 1).

Specifically, an engagement member that engages with the electric wiring board, and an elastic member that elastically deforms so as to increase the engagement force between the engagement member and the electric wiring board, on the resin case of the rotating inner unit Form. As a result, the engaging force between the engaging member and the electric wiring board is increased by the elastic force of the elastic member, so that the engaging member rattles against the electric wiring board regardless of the change in the ambient temperature. This can be suppressed.
JP 2001-324356 A

  However, when the instrument according to the prior art is applied to a vehicle, the turning inner unit may vibrate with respect to the electric wiring board due to the actual vehicle vibration of the vehicle. This is because the acceleration caused by the actual vehicle vibration acts on the rotating internal unit, thereby applying a load to the rotating internal unit. This load also acts on the rotating inner unit in the direction opposite to the engaging force between the engaging member and the electric wiring board.

  This engagement force is increased by the elastic force of the elastic member, but since the elastic member is arranged away from the engagement portion of the engagement member and the electric wiring board, the effect of increasing this engagement force is It cannot be said that the load due to the actual vehicle vibration is sufficient. When the load due to the actual vehicle vibration is larger than the engagement force, the turning inner unit fluctuates (vibrates) with respect to the electric wiring board. This problem is remarkable in a two-wheeled vehicle in which large vibrations occur.

  As a result, a load due to actual vehicle vibrations acts on the soldering portion of the terminal pin, so that the soldering portion may be damaged, resulting in poor electrical continuity.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an instrument that does not vibrate a rotating inner unit that rotates a pointer with respect to an electric wiring board.

  In order to achieve the above object, the present invention employs the following technical means.

  The instrument according to claim 1 is inserted into the dial, the pointer rotating along the front surface of the dial, the electric wiring board disposed behind the dial and having the engagement hole, and the engagement hole. A rotating inner unit that has an engaging member that is pressed against the engaging inner surface of the engaging hole and engages the electric wiring board and rotates the pointer, and an abutting inner surface that faces the engaging inner surface in the engaging hole. It is set as the structure provided with the restraint member provided so that the engaging member which contact | abutted and engaged with the electrical wiring board may be restrained with respect to an electrical wiring board.

  In this configuration, the engagement member engaged with the electrical wiring board is restrained with respect to the electrical wiring board by the restraining member that is in contact with the contact inner surface of the engagement hole facing the engagement inner surface. That is, since the engaging member can be directly restrained with respect to the electric wiring board by the restraining member at a position close to the engaging inner surface, the rotating inner unit can be reliably restrained with respect to the electric wiring board, and the rotating inner unit can be electrically It is possible to prevent vibration with respect to the wiring board.

  The instrument according to claim 2 is configured such that the engaging member includes an engaging portion which is inserted through the engaging hole and engages with the electric wiring board on the distal end side thereof.

  Even in this configuration, the above-described effects can be obtained.

  The instrument according to claim 3 has a configuration in which the engaging portion has a claw shape and the restraining member is provided on the back side of the engaging portion in the engaging member.

  Even in this configuration, the above-described effects can be obtained.

  The instrument according to claim 4, wherein the engaging portion is formed from a resin material, and the restraining member is formed by thermally crimping the engaging portion after engaging the engaging member with the electric wiring board. To do.

  In this configuration, since the restraining member is formed by caulking the engaging portion, the above-described effects can be easily obtained.

  The meter according to claim 5 is configured such that the restraining member is provided after the engaging member is engaged with the electric wiring board.

  In this configuration, since the restraining member is provided after the engaging member is engaged with the electric wiring board, the above-described effects can be obtained by simply adding the restraining member.

  The instrument according to claim 6 is configured such that the restraining member is formed by melting and solidifying the hot melt adhesive.

  With this configuration, the above-described effects can be obtained more easily.

  The instrument according to claim 7 is an elastic member that applies an elastic force to the engaging member so that the restricting member restrains the engaging member engaged with the electric wiring board with respect to the electric wiring board. The configuration.

  In this configuration, the engaging member engaged with the electric wiring board is restrained with respect to the electric wiring board by directly applying an elastic force thereto. As a result, the engaging member is securely restrained with respect to the electric wiring board, so that the rotating inner unit attached to the electric wiring board can be reliably restrained with respect to the electric wiring board, and the rotating inner unit is electrically connected. It is possible to prevent vibration with respect to the wiring board.

  Hereinafter, the case where the combination meter 1 which is a meter according to the present invention is applied to a two-wheeled vehicle meter will be described with reference to the drawings.

  FIG. 1 is a front view of a combination meter 1 which is a meter according to an embodiment of the present invention.

  2 is a cross-sectional view taken along line II-II in FIG.

  FIG. 3 is a plan view of the movement 5 which is a rotating inner unit in FIG.

  4A is a side view of the wedge 6 that is a restraining member in FIG. 2, and FIG. 4B is a plan view of the wedge 6.

  A combination meter 1 that is an instrument is arranged in front of the driver's seat of a two-wheeled vehicle and displays various information related to the two-wheeled vehicle. As shown in FIG. 1, the combination meter 1 according to the present embodiment constitutes a speedometer that displays a traveling speed.

  The combination meter 1 includes a dial 2 for displaying information and allowing a driver to visually recognize the character. The dial 2 is formed with letters (including numbers) and scales.

  As shown in FIG. 2, the dial 2 is provided with a through hole 21 through which the shaft 51 of the movement 5 is inserted, and an electric wiring is provided behind the dial 2 (lower side indicated by an arrow in FIG. 2). A printed circuit board 4 that is a plate and a movement 5 are arranged. The movement 5 is mounted on the printed circuit board 4. The rotating inner unit includes a movement 5 and a shaft 51.

  The movement 5 is composed of a resin case 50 and a rotating inner machine main body (for example, a cross-coil actuator or a stepping motor) built in the resin case 50, and an external electric signal (in this embodiment, a signal related to a traveling speed). ) To rotate the shaft 51 by an angle corresponding to. The shaft 51 extends through the through hole 21 of the dial 2 to the front side, that is, the upper side indicated by the arrow in FIG. 2, and the pointer 3 is fixed to the tip thereof.

  The resin case 50 is preferably made of a resin that is not easily creeped by heat because it is close to the rotating inner machine main body that generates heat, and is preferably an elastic resin having high strength because it directly receives the vibration of the rotary inner machine main body. For this reason, the resin case 50 of this embodiment is suitable using polyphenylene oxide resin (PPO resin) or the like.

  Next, the configuration of the resin case 50 will be described in relation to the printed circuit board 4.

  As shown in FIGS. 2 and 3, the two engaging members 52 are substantially L-shaped along the axial direction of the shaft 51 from a symmetrical position around the shaft 51 in the outer peripheral portion on the bottom wall side of the resin case 50. And is integrally formed with the resin case 50. Both engaging members 52 are formed to face each other, and each has a claw-shaped engaging portion 52a on the tip side.

  The distance between the centers of the engagement holes 41 of the printed circuit board 4 is set so that the engagement portions 52 a of the engagement member 52 can be inserted into the engagement holes 41. In addition, both positioning pins 54 are formed on the upper wall of the resin case 50 so as to be fitted into positioning holes (not shown) of the printed circuit board 4.

  Further, on the upper wall of the resin case 50, four terminal pins 53 are formed so as to be inserted and soldered to land holes (not shown) of the printed board 4 (not shown). Each terminal pin 53 is connected to each connection terminal of the rotary inner machine body at the inner end thereof.

  The wedge 6 which is a feature of the present invention and is a restraining member is formed by punching or bending from an elastic material having elasticity (spring force, elastic force) such as a thin steel plate (for example, a plate thickness of 0.3 mm). Thus, the shape shown in FIG. 4 is formed.

  In the above configuration, the assembly of the movement 5 to the printed circuit board 4 and the attachment of the wedge 6 to these are performed as follows.

  As shown in FIG. 2, the printed circuit board 4 is held on the upper side of the movement 5. In this state, the shaft 51 is inserted into the through hole 42 of the printed circuit board 4 from the back side. Thereafter, each positioning portion of the resin case 50 is positioned in each positioning hole portion of the printed circuit board 4 so that the engaging portions 52 a of the both engaging members 52 of the resin case 50 are opposed to the respective engaging holes 41 of the printed circuit board 4. The pins 54 are fitted at the tips thereof, and the terminal pins 53 of the resin case 50 are inserted into the land holes of the printed circuit board 4.

  In this state, both engaging portions 52 a are inserted into the engaging holes 41 of the printed circuit board 4 while elastically deforming both engaging members 52, and both engaged members 52 are engaged with the printed circuit board 4. The engagement member 52 is pressed against the engagement inner surface 41 a of the engagement hole 41 in the direction of the X axis in FIG. 2 by the elastic force, and the engagement portion 52 a is against the upper surface 43 of the printed circuit board 4. It is pressed in the direction of the Y axis in FIG. Thereby, the engaging member 52 engages with the printed circuit board 4, and the movement 5 is attached to the printed circuit board 4.

  Thereafter, the wedges 6 are attached to the movement 5 and the printed circuit board 4 with the engagement holes 41, and the terminal pins 53 are soldered to the lands of the printed circuit board 4. This soldering is desirably performed after the wedge 6 is attached, in order to prevent the elastic force of the wedge 6 from being applied to the solder portion.

  Each wedge 6 has its one end in contact with the contact inner surface 41b facing the engagement inner surface 41a in each engagement hole 41 and the other end in contact with the back surface of the engagement member 52. 4 is attached.

  The engagement member 52 is pressed against the engagement inner surface 41a of the engagement hole 41 in the direction of the X axis in FIG. 2 by the elastic force (spring force) of the wedge 6, and the engagement member 52 (the engagement portion 52a). ) Is pressed against the upper surface 43 of the printed circuit board 4 in the direction of the Y-axis in FIG. As described above, the engagement member 52 is pressed against the engagement inner surface 41 a of the engagement hole 41 by the elastic force, and the engagement member 52 (engagement portion 52 a) is pressed against the upper surface 43 of the printed circuit board 4. It is done.

  That is, the wedge 6 effectively uses the engagement space (vacant space) between the engagement member 52 and the printed circuit board 4 to increase the engagement force for engaging the engagement member 52 with the printed circuit board 4. The engaging member 52 is restrained with respect to the printed circuit board 4.

  Since the engagement member 52 is directly restrained by the wedge 6 with respect to the printed circuit board 4 at a position close to the engagement inner surface 41a of the engagement hole 41 (the back surface of the engagement member 52), the engagement member 52 is attached to the printed circuit board 4. The movement 5 can be reliably restrained with respect to the printed circuit board 4, and the movement 5 can be prevented from vibrating with respect to the printed circuit board 4.

  The above-described combination meter 1 which is a meter according to an embodiment of the present invention includes a dial 2, a pointer 3 that rotates along the front surface of the dial 2, and an engagement hole disposed behind the dial 2. A printed circuit board 4 that is an electric wiring board having 41, and an engagement member 52 that is inserted into the engagement hole 41 and pressed against the engagement inner surface 41 a of the engagement hole 41 to engage with the printed circuit board 4 and the pointer 3 And the engagement member 52 that is in contact with the contact inner surface 41 b facing the engagement inner surface 41 a in the engagement hole 41 and engaged with the printed circuit board 4 is attached to the printed circuit board 4. And a restraining member provided so as to restrain it.

Thereby, it is possible to prevent the movement 5 from vibrating with respect to the printed circuit board 4.
(Modification)
FIG. 5 is a cross-sectional view showing a first modification of FIG.

  FIG. 6 is a cross-sectional view showing a second modification of FIG.

  In the first modified example, as shown in FIG. 5, a hot melt part 61 formed by melting and solidifying a hot melt adhesive is provided instead of the wedge 6. Specifically, after the engagement member 52 is engaged with the printed circuit board 4, that is, after the movement 5 is attached to the printed circuit board 4, the hot melt adhesive is melted and solidified to form the hot melt portion 61. .

  The hot melt adhesive is a thermoplastic resin adhesive that does not contain a solvent, and fills at least the space between the contact inner surface 41b of the engagement hole 41 and the rear surface of the engagement member 52 in a molten state having a low viscosity. Application is performed so as to cover the engaging portion 52 a of the engaging member 52 and the upper surface 43 of the printed circuit board 4. The hot melt adhesive is immediately solidified by cooling from the contact surface with the atmosphere, the printed circuit board 4, and the engagement member 52, so that a problem of flowing out from the engagement hole 41 does not occur. In addition, polyurethane etc. can be used as a hot-melt-adhesive.

  Thereby, the above-described effects can be easily obtained.

  In the second modified example, as shown in FIG. 6, instead of the wedge 6, a heat caulking portion 62 formed by heat caulking the engaging portion 52 a is provided. Specifically, after the engagement member 52 is engaged with the printed circuit board 4, that is, after the movement 5 is attached to the printed circuit board 4, the engagement portion 52 a is thermally crimped to form the thermal crimping portion 62. . The heat crimping portion 62 is formed so as to contact at least the contact inner surface 41 b of the engagement hole 41.

  Thereby, the above-described effects can be easily obtained.

  In carrying out the present invention, the present invention can be applied to instruments employed in automobiles and other vehicles, without being limited to motorcycle instruments.

  The meter according to the present invention includes an electric wiring board having an engagement hole, and an engagement member that is inserted into the engagement hole and pressed against the engagement inner surface of the engagement hole to engage with the electric wiring board. A rotating inner unit for rotating the engagement member, and an engagement member that is in contact with the contact inner surface that faces the engagement inner surface in the engagement hole and that is engaged with the electric wiring board is constrained to the electric wiring board. And a restraining member.

  As long as this feature is satisfied, the present invention is not limited to the above-described example, and various other modifications can be considered.

FIG. 1 is a front view of a combination meter 1 which is a meter according to an embodiment of the present invention. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a plan view of the movement 5 which is a rotating inner unit in FIG. 43A is a side view of the wedge 6 that is a restraining member in FIG. 2, and FIG. 4B is a plan view of the wedge 6. FIG. 5 is a cross-sectional view showing a first modification of FIG. FIG. 6 is a cross-sectional view showing a second modification of FIG.

Explanation of symbols

1 Combination meter
2 Dial, 21 Through-hole, 3 Pointer 4 Printed circuit board (electrical wiring board), 41 Engagement hole, 41a Engagement inner surface, 41b Contact inner surface,
42 through hole, 43 upper surface 5 movement (rotating inner machine), 50 resin case, 51 shaft 52 engaging member, 52a engaging portion, 53 terminal pin, 54 positioning pin 6 wedge (restraint member, elastic member), 61 hot Melt part, 62 Heat caulking part

Claims (7)

Dial,
A pointer that rotates along the front surface of the dial;
An electrical wiring board disposed behind the dial and having an engagement hole;
A rotating inner unit that has an engaging member that is inserted into the engaging hole and is pressed against the engaging inner surface of the engaging hole to engage with the electric wiring board, and rotates the pointer;
A restraining member provided to restrain the engaging member that is in contact with the abutting inner surface facing the engaging inner surface in the engaging hole and that is engaged with the electric wiring board with respect to the electric wiring board. Instrument characterized by that.   The instrument according to claim 1, wherein the engagement member includes an engagement portion that is inserted into the engagement hole and engages with the electric wiring board on a distal end side thereof. The engaging portion has a claw shape,
The instrument according to claim 2, wherein the restraining member is provided on a back side of the engaging portion in the engaging member. The engaging portion is formed of a resin material;
The instrument according to claim 2 or 3, wherein the restraining member is formed by caulking the engaging portion after engaging the engaging member with the electric wiring board.   The instrument according to any one of claims 1 to 3, wherein the restraining member is provided after the engaging member is engaged with the electric wiring board.   The instrument according to claim 5, wherein the restraining member is formed by melting and solidifying a hot melt adhesive.   The restraining member is an elastic member that applies an elastic force to the engaging member so as to restrain the engaging member engaged with the electric wiring board with respect to the electric wiring board. The instrument according to any one of claims 1 to 6.

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