JPH0249592Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a balance weight mounting structure for a meter pointer attached to a vehicle meter such as an automobile.

[Conventional technology]

Generally, in the pointer structure of this type of meter, the base side of the pointer is fixed to the upper end of the pointer shaft of the meter by means such as press fitting. Further, the pointer has an indicator portion extending relatively from the center of the pointer shaft in one direction substantially perpendicular to the axis.

In addition, when a meter is operating, if the weight balance of the pointer itself is greatly disrupted, the indicating characteristics are likely to be adversely affected, so a balance weight is usually provided at the base of the pointer, which is located in the direction opposite to the direction of extension of the indicating section of the pointer. , to maintain the weight balance of the entire pointer mechanism.

[Problem that the invention attempts to solve]

Incidentally, in order to maintain the weight balance of the entire pointer mechanism, a pointer cap is placed over the base of the pointer, as is known from, for example, Japanese Utility Model Application No. 55-40377. The wall thickness of the pointer cap located in the direction opposite to the direction of extension of the pointer cap is increased so that it functions as a balance weight.

However, in the conventional structure described above,
For example, if the pointer cap is made of a material with approximately the same specific gravity as the pointer, it will function as a slight balance weight, but it will compensate for the unbalance of the pointer's overall pointing part, which is located away from the center of rotation of the pointer. However, as a result, the balance of the pointer remains unbalanced, which affects the indicating characteristics of the pointer.

In addition, taking this point into account, if the pointer cap is made of a material with a higher specific gravity than the pointer, the weight of the entire pointer will increase, putting a strain on the pivot point of the pointer shaft formed on the indicating instrument, and causing bearing wear. There is a problem in that the torque of the indicating instrument is affected and the follow-up performance of the indicating instrument becomes poor.

In addition, as a balancer mechanism for other pointers, for example, in the case of a pointer structure in which the base side of the pointer is not covered with a pointer cap,
As disclosed in Publication No. 154552, a balance weight is heat welded, a claw is provided on the base side of the pointer,
A balance weight is attached to the back side of the base of the pointer using this pawl, but since the parts of the pointer itself are small, there are difficulties in assembling or fixing the pointer.

In addition, regarding the pointer balancer structure in which the base side of the pointer is covered with a pointer cap to hide the base side of the pointer and improve the external shape, for example, Japanese Utility Model Application Publication No. 56-35088, As disclosed in Publication No. 56-114497, etc., a balance weight larger than the specific gravity of the pointer is individually fixed to the pointer cap located on the side opposite to the indicating part of the pointer,
Alternatively, a separate balance weight is fixed to the base of the pointer, but even in the structure of fixing the balance weight of this pointer, the balance weight is mainly assembled and fixed by means such as gluing or welding. However, it is difficult to assemble it.

[Means to solve the problem]

The purpose of this invention is to solve the above-mentioned problems, and therefore, in a device in which a pointer is attached to the pointer shaft of a meter, the pointer is made of a synthetic resin material, and the pointer has a A mounting part for placing a balance weight on the upper surface portion of the base of the pointer, which is located in the direction opposite to the direction of extension of the pointer indicator, and has a base attached to the pointer and an indicator extending from the base in a direction orthogonal to the pointer axis. A pointer cap is formed to cover the upper surface and circumferential side of the base of the pointer, and a balance weight having a specific gravity larger than the pointer and the pointer cap is sandwiched between the placement part provided at the base of the pointer and the pointer cap. The balance weight mounting structure of the instrument pointer is characterized by the ability to hold the balance weight.

〔Example〕

Embodiments of the present invention will be described in detail below based on the accompanying drawings.

In this embodiment, a luminescent type pointer structure will be explained as an example. An indicating instrument (not shown) is disposed below a light-transmitting light guide 20 that serves as a fixing member of the instrument, and is housed and fixed in a housing. ing. Further, a through hole 21 is bored in the middle of the light guide 20, and a light guide reflection surface 22 is formed on the inner wall of the through hole 21 in a conical shape.

A thin plate 23 on which scales, numerical values, etc. are applied except for the surface portion of the light guide 20 corresponding to the light guide reflective surface 22.
is disposed in close contact with the light guide 20, and a pointer shaft 24 forming a part of an indicator (not shown) is inserted from below into the through hole 21 formed in the light guide 20. A translucent pointer 25 made of acrylic resin or the like is fixed to the upper end of the pointer shaft 24 .

The pointer 25 is formed with a base 26 into which the pointer shaft 24 is press-fitted, and a pointer 26 is integrally formed from the base 26 of the pointer 25 in substantially parallel to the thin plate 23 closely disposed on the surface of the light guide 20. 27 is formed.

In addition, a base 26 located on the proximal end side of the indicator 27
is provided with a reflective surface 28 formed by a curvature that is inclined at approximately 45 degrees from the center of the base 26 toward the indicator 27 and focuses on the distal end of the indicator 27,
In addition, behind the pointer shaft 24 in the base 26, there is a pointer shaft 24 inside the light guide surface 22 of the light guide 20.
A light incident surface 29 is formed that stands up substantially parallel to the surface. This light incident surface 29 is formed in a plane perpendicular to the direction of extension of the indicator 27.
It may be formed into an arcuate curved surface whose basic axis is a line parallel to the pointer shaft 24 passing near the base end of the pointer, or may be formed into a convex condensing shape.

The pointer cap 30 covers the upper surface and the circumferential surface of the base 26, and its outer diameter is the same as the light guide reflective surface 2 of the light guide 20.
A balance weight 32 is formed in a size that hides 2 from the front line of sight position, and has a reflective mirror surface 31 inclined at approximately 45 degrees above the light guiding reflective surface 22 on the rear inner side of the light incident surface 29 on the substrate 26.
is fixed. That is, in order to maintain the weight balance of the entire pointer 25 including the indicator 27, the balance weight 32, which has a higher specific gravity than the material of the pointer 25 and the material of the pointer cap 30, is arranged on the rear side opposite to the indicator 27. I have to.

Further, an arbitrary number of light sources 33 are disposed at appropriate positions at the side end portion of the light guide 20.

In addition, in the present invention, the pointer base 2 is used as a means for fixing and holding the balance weight 32 described above.
By clamping and fixing the balance weight 32 between the pointer cap 30 and the mounting portion integrally provided at the appropriate location of the pointer 6, the balance weight 32 can be stopped at the same time when the pointer cap 30 is fitted onto the pointer 25. This provides a structure that allows for

That is, in this embodiment, the base 26 of the pointer 25
is formed with a thin mounting portion 34 projecting integrally from the lower end of the light entrance surface 29 and a rod-shaped mounting portion 35 projecting from the middle upper surface of the base 26. The pointer 25 is covered with a pointer cap 30. In order to support the balance weight 32 when fitting it, each of the above-mentioned mounting parts 34, 3
5 and the pointer cap 30 and are clamped and fixed. In this case, a groove 36 is formed at the upper end of the balance weight 32, and a rod-shaped mounting portion 3 is formed in the groove 36.
5 will fit into place and be securely fixed.

The mounting portion 34 is a flat plate that protrudes from the lower end of the light entrance surface 29 of the base 26, and is configured to evenly support the balance weight 32 on its upper surface. The balance weight 32 can be positioned reliably by forming two protruding rod-like projections to form a placing part and by forming step parts at both ends of the lower part of the balance weight 32 and engaging them in a corresponding manner. can.

Note that depending on the shape of the pointer and its important distribution, the size and shape of the balance weight may be appropriately set, and the mounting portion provided at the base of the pointer may also have a configuration consisting of only a flat surface.

In addition, when assembling, the balance weight 32 is placed on the placement parts 34 and 35 of the base 26 of the pointer 25,
Next, the pointer cap 30 can be assembled to the base portion 26 of the pointer 25 so as to overlap one after another, and the workability thereof can be improved.

Note that the balance weight is positioned and arranged on the pointer cap side, and in this state, the pointer cap is fitted on the pointer base side, and the balance weight is placed between the placement part provided at the pointer base and the pointer cap. It may also be held by being clamped.

[Effect of idea]

As described above, in the balance weight mounting structure of the instrument pointer of the present invention, a balance weight having a specific gravity larger than the pointer and the pointer cap can be held between the mounting part provided at the base of the pointer and the pointer cap. This makes it possible to easily assemble the pointer while reducing the size of the base of the pointer, which improves workability.Moreover, by reducing the weight of the entire pointer, the pointer operates better. be.

[Brief explanation of drawings]

The figure is a sectional view of an assembled state of an embodiment of the present invention. Light guide...20, Through hole...21, Light guide reflective surface...22, Thin plate...23, Pointer shaft...24, Pointer...25, Base...26, Indicator...27, Reflective surface ...28, Light entrance surface...29, Pointer cap...
30. Reflective mirror surface... 31. Balance weight...
32, light source...33, mounting section...34,35.

Claims (1)

[Scope of utility model registration request] In an instrument in which a pointer is attached to a pointer shaft, the pointer is made of a synthetic resin material, and the pointer has a base attached to the pointer shaft and an indicator extending from the base in a direction orthogonal to the pointer shaft. and a pointer cap that forms a mounting part for placing a balance weight on the upper surface of the base of the pointer located in the opposite extension direction of the pointer indicating part, and covers the upper surface and peripheral side of the base of the pointer. A balance weight mounting structure for an instrument pointer, characterized in that a balance weight having a specific gravity larger than that of the pointer and the pointer cap is sandwiched and held between a placement part provided at the base of the pointer and the pointer cap.