JP2530790Y2 - Pointer structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer structure suitable for, for example, a light emitting pointer of an analog meter used for various instruments such as automobiles.

[0002]

2. Description of the Related Art For example, Japanese Utility Model Publication No.
There is one disclosed in Japanese Patent Application Laid-Open No. 2-22812. The pointer structure is shown in FIGS. In this case, a rod-shaped balance weight support 3 is formed on the pointer reflection surface 5 located in the direction of the pointer shaft 7 of the pointer indicator 2, and the rod-shaped balance weight support 3 is fixed to a hole provided in the balance weight 4. Then, the pointer reflecting surface 5 is
And the balance weight 6.
Thus, the balance weight 4 is always mounted on the rod-shaped balance weight support portion 3 at a predetermined position, and the weight balance of the entire pointer is maintained in balance by attaching the balance weight 4.

[0003]

However, in the conventional structure as shown in FIGS. 5 and 6, since the balance weight 4 is fixed to the rod-shaped balance weight support 3 provided on the pointer reflecting surface 5, The balance weight support 3 can take up only a small space, and the long light emitting pointer of the pointer indicating unit 2 which has high social needs in recent years cannot maintain the overall balance because the weight of the balance weight 4 is light. A long luminous pointer becomes heavier by the length of the pointer, so a large balance weight is needed to balance this weight. Also, poor weight balance of the pointer degrades pointing accuracy). There are drawbacks that are difficult to deal with.

Further, a rod-shaped balance weight support 3 provided on the pointer reflecting surface 5 of the light transmitted through the light guide 8 is provided.
Is not guided to the pointer indicating unit 2, and thus does not become an effective pointer reflection surface. Therefore, in order to transmit a sufficient amount of light to the pointer indicating unit 2, the cross-sectional area of the rod-shaped balance weight support 3 must be reduced. In this case, the balance weight support 3 becomes thin. It is difficult to secure the rigidity and it is not suitable for automatic assembly.

[0005] Therefore, in the first or second aspect of the present invention, a sufficient press-fitting space is ensured by ensuring a sufficient balance weight storage space to meet the demands of the long pointer indicating portion, and by eliminating excessive frictional force at the time of press-fitting. It is an object of the present invention to provide a pointer structure capable of performing high-precision automatic assembly without fluctuation of the assembly position in the device. It is another object of the present invention to provide a pointer structure which does not impair the amount of light guided to the pointer indicating portion.

[0006]

According to the present invention, a base (21) which is press-fitted and fixed to a pointer shaft (7) of an instrument main body, and an axial direction of the pointer shaft (7) are provided to solve the above object. A pointer indicating portion (2) extending orthogonally and in one direction from the base portion (21), and positioned in a direction opposite to the extension of the pointer indicating portion (2) of the base portion (21), to balance the weight of the entire pointer. Balance weight support portion (3) for inserting and holding the balance weight (4), and the base portion (21) covering the upper surface side and peripheral side surface of the balance weight support portion (3).
The balance weight support (3) has a vertical surface (3) substantially perpendicular to the extending direction of the pointer indicator (2).
a), an inclined surface (3b) inclined with respect to the vertical surface (3a) and extending in the axial direction of the pointer shaft (7), and an inclined surface (3b) substantially perpendicular to the vertical surface (3a). An inner side surface (3c) extending in the axial direction is formed, and the balance weight (4) has a vertical back surface (4a) facing and abutting on the vertical surface (3a), and the balance weight (4) is inclined with respect to the vertical back surface. A projecting inclined surface (4b) extending in the axial direction of the pointer shaft (7) and abutting against the inclined surface (3b);
a) a wall vertical surface (4c) which is substantially perpendicular to a) and extends in the axial direction of the pointer shaft (7) and faces the inner side surface (3c); and the wall vertical surface (4) of the balance weight (4) is formed.
(c) and the inner surface (3c) of the balance weight support (3) does not abut on each other.

[0007]

According to the present invention, the balance weight (4) and the balance weight support portion (3) abut the inclined surface (3b) and the projecting inclined surface (4b), and the inner surface (3c) and the wall vertical surface (4c). ) Does not come into contact, so the contact area is reduced,
A large frictional force at the time of press-fitting into the balance weight support (3) is eliminated, and press-fitting is easy.

Further, the vertical back surface (4a) formed on the balance weight and the vertical surface (3a) formed on the balance weight support portion are press-fitted and held so as to surely adhere to each other. Adjustment of the attachment position can be eliminated, and variation in the balance of the entire pointer due to press-fitting of the balance weight can be greatly improved.

As described above, when the present structure is employed, the press-fitting position of the balance weight is determined by the inclined surface, the projected inclined surface, and
The vertical plane and the vertical back are automatically determined to press each other when inserting.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an embodiment of the present invention; FIG. Above an internal mechanism (for example, a coil-type mechanism) (not shown) used for the analog meter, a light guide 8 (for example, polycarbonate resin) having excellent light transmission property is disposed. Is formed with a shaft hole 20 through which the pointer shaft 7 protruding upward from the internal mechanism is inserted.

On the front side of the light guide 8 substrate, a dial 10 having translucency is provided in a laminated manner.
A dial hole 23 lacking a position corresponding to the light guide reflection surface 9 formed in the light guide 8 is formed in
Display indices 24 such as translucent scales and characters are formed on the surface of the dial 10.

A base 21 is disposed above the pointer shaft 7 through a shaft press-fit hole 22. The base 21 has a pointer indicating portion 2 and a balance weight support portion 3 each made of a material having translucency. (For example, a polycarbonate resin). The pointer indicating portion 2 is formed substantially in parallel with the dial 10, and the other one of the balance weight bearing portions 3 provided in the opposite direction to the pointer indicating portion 2 is provided with a pointer 1. In order to maintain the weight balance, a balance weight 4 (for example, lead) having a specific gravity greater than that of the material of the pointer indicating portion 2 is attached and held.

The balance weight support 3 and the base 2
A pointer cap 6 formed of a light-blocking member (for example, polyacetal) that covers the top surface and the peripheral side surface is attached to 1.

At a position located on the base end side of the pointer indicating section 2, the base is inclined approximately 45 degrees upward from the base 21,
The pointer reflecting surface 5 having the base end side of the pointer indicating portion 2 as a focal point is formed, and the shaft hole 20 in the light guide 8 is also provided.
The light-guiding reflection surface 9 that is inclined approximately 45 degrees from the base 21 toward the light source 11 is formed.

Next, the structure of the balance weight support 3 will be described with reference to FIGS. Reference numeral 3a denotes a vertical surface provided on the balance weight support portion 3 and substantially perpendicular to the pointer indicating portion 2, and is in close contact with a vertical back surface 4a formed on the balance weight 4, and 3b is provided on the balance weight support portion 3. And is in contact with the projecting inclined surface 4b formed on the balance weight 4. Reference numeral 4c denotes a wall vertical surface formed on the balance weight 4, and this surface does not come into contact with the inner side surface 3c of the balance weight support 3.

According to the above configuration, the irradiation light from the light source 11 enters the light guide 8 and is reflected by the light guide reflection surface 9 formed on the light guide 8 as shown by the arrow in FIG. It is led to the base 21 side through the dial hole 23 formed in the dial 10. Thereafter, the irradiation light incident on the base 21 side is reflected by the pointer reflecting surface 5 formed on the pointer indicator 2, and is guided in the axial direction of the pointer indicator 2, so that the entire pointer indicator 2 emits light. I do.

Further, by disposing the pointer reflecting surface 5 and the balance weight support 3 at positions symmetrical to each other with respect to the pointer shaft 7 as in the above configuration, a rod-shaped balance weight support as in the prior art is provided. The cross-sectional integral of the section 3 can be guided to a sufficient amount of light from the light source 11 to the pointer indicating section 2 without being affected by the fact that the section 3 is not guided to the pointer indicating section 2. Therefore, a large space that allows insertion of the balance weight 4 having a sufficient size can be secured.

As shown in FIGS. 1 and 3, a projecting inclined surface 4b is formed at the end of the balance weight 4, and an inclined surface 3b is formed on the balance weight support 3 so as to be in contact with the projecting inclined surface 4b. Further, by forming a vertical surface 3a in contact with a vertical back surface 4a formed on the balance weight 4, and having the structure in which the balance weight 4 is tightly enclosed by the inclined surface 3b and the vertical surface 3a, the balance weight has been conventionally improved. Sufficient rigidity can be imparted to the support 3.

Further, the wall vertical surface 4c of the balance weight 4
And the inner surface 3c of the balance weight support 3 is provided with a gap, so that the balance weight 4
It is possible to eliminate the frictional force generated between the inner surface 3c and the wall vertical surface 4c at the time of press-fitting. Thus, it is possible to provide a pointer structure that can easily cope with automatic assembly.

Further, the vertical back surface 4a of the balance weight 4 can be securely brought into close contact with the vertical surface 3a of the balance weight support portion 3 by the inclined surface 3b, so that the assembly position of the balance weight 4 does not fluctuate. However, the accuracy of the unbalance moment can be improved.

FIG. 4 is a perspective view showing a main part of another embodiment of the present invention. In this embodiment, 3d is a chamfer formed diagonally above the balance weight support 3. By providing the chamfered portion 3d, automatic positioning of the balance weight 4 at the time of press-fitting (inserting) the balance weight 4 is further facilitated.

[0022]

As described above, in the first or second aspect of the present invention, a vertical surface, an inclined surface, and an inner surface are formed on the balance weight support portion, and the vertical back surface, the projecting inclined surface, And, by forming a wall vertical surface so that the wall vertical surface and the inner surface do not abut each other, the wall vertical surface and the inner surface when the balance weight is pressed into the balance weight support portion are formed. Since it is possible to eliminate the frictional force generated between the mutual surfaces, it is possible to easily perform insertion by automatic assembly.

In addition, since a large space for inserting a large balance weight can be secured in the balance weight support portion, a balance weight having a size sufficient for a long pointer indicating portion is inserted. It is possible to do.

Further, since the vertical back surface can be securely held in close contact with the vertical surface by the inclined surface formed in the balance weight support portion, a change in the mounting position of the balance weight can be eliminated, and the balance of the entire pointer can be varied. There is an excellent effect that the unbalance moment can be greatly reduced.

According to the third aspect, in addition to the above effects, it is possible to secure a sufficient amount of emitted light without impairing the amount of light guided to the pointer indicating unit.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part taken along line AA of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is an enlarged perspective view of a main part showing another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a main part showing a conventional device.

6 is an exploded perspective view of FIG. 5 showing a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pointer 2 Pointer indicating part 3 Balance weight support part 3a Vertical surface 3b Inclined surface 3c Inner surface 3d Chamfered part 4 Balance weight 4a Vertical back surface 4b Projection inclined surface 4c Wall vertical surface 5 Pointer reflecting surface 6 Pointer cap 7 Pointer shaft 21 Base

Claims (3)

(57) [Scope of request for utility model registration] 1. A base portion (21) which is press-fitted and fixed to a pointer shaft (7) of an instrument body, and a pointer indicator which is substantially orthogonal to the axial direction of the pointer shaft (7) and extends from the base portion (21) in one direction. Part (2) and the pointer indicating part (2) of the base part (21)
And a balance weight support (3) for inserting and holding a balance weight (4) for balancing the weight of the entire pointer, and an upper surface side and a peripheral side surface of the balance weight support (3). Cover the base (21)
A pointer cap having a pointer cap (6) attached to the balance weight supporting portion (3); a vertical surface (3a) substantially perpendicular to an extending direction of the pointer indicating portion (2);
An inclined surface (3b) that is inclined with respect to the vertical surface (3a) and extends in the axial direction of the pointer shaft (7), and extends substantially perpendicular to the vertical surface (3a) in the axial direction of the pointer shaft (7). An inner surface (3c) is formed, and the balance weight (4) is provided with the vertical surface (3a).
A vertical back surface (4a) contacting and abutting against the vertical back surface; and a projecting inclined surface (4b) inclined with respect to the vertical back surface and extending in the axial direction of the pointer shaft (7) and abutting against the inclined surface (3b). ,
A wall vertical surface (4c) which is substantially perpendicular to the vertical back surface (4a) and extends in the axial direction of the pointer shaft (7) and is opposed to the inner side surface (3c) is formed.
The vertical wall (4c) of the wall and the inner surface (3c) of the balance weight support (3) do not come into contact with each other. 2. The pointer structure according to claim 1, wherein the balance weight bearing (3) has a chamfer (3d) formed on the vertical surface (3a) and the inner surface (3c). . 3. The base (2) of the pointer indicating section (2).
1) The pointer structure according to claim 1 or 2, wherein a reflection surface (5) for guiding light for causing the pointer indicator to emit light is formed at the side end.