JPH055281Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to, for example, a configuration in which a light shielding plate is attached to an instrument case to make the illumination light from the lighting of a vehicle instrument substantially uniform. , relates to press-fit structures in instruments.

[Conventional technology]

Figure 1 is a cross-sectional view of a conventional example of this type of structure, and Figure 2 shows its main parts, showing a type of structure in which a light-shielding plate is attached to the instrument case to make the illumination light of vehicle instruments almost uniform. It shows.

In the figure, 1 is an instrument case, the instrument body 2,
A pointer 3 that rotates with the meter body 2, a dial plate 4 fixed to the upper part of the meter body 2, and the like are housed.
A lighting lamp 5 is attached to the bottom wall of the instrument case 1 via a socket 6 to illuminate the instruments at night. A plurality of struts 7 are formed rising from the bottom wall of the instrument case 1 around the illumination light 5, and a press-fit pin 8 is formed at the tip of the strut 7.
The tip part is hemispherical, and the part near the support 7 is cylindrical. Reference numeral 9 denotes a light-shielding plate as a press-fitting member, and this light-shielding plate 9 has a press-fit hole 10 formed at a position corresponding to the press-fit pin. It is fixedly attached to the instrument case 1, and suppresses the unbalance of illumination that occurs when only the part of the dial plate 4 close to the light 5 is brightly illuminated when the instrument is illuminated by the light 5, and it is possible to control the illumination imbalance in the case where only the part of the dial 4 close to the light 5 is brightly illuminated. Light passage hole 1 in place
1 is drilled.

[The problem that the idea attempts to solve]

When press-fitting the light shielding plate 9 into the press-fitting pin 8,
The press-fit hole 10 of the light shielding plate 9 is inserted into the hemispherical guide portion 8A.
This is a press-fit fixation that utilizes the fitting force between the light-shielding plate 9 and the press-fit pin 8, which is inserted into the base portion 8B of the cylindrical shape and then press-fitted into the base portion 8B.

At this time, the diameter of the press-fit pin 8 is formed to be larger than the diameter of the press-fit hole 10 so that the press-fit hole 10 will not separate from the press-fit pin 8 even due to fairly severe vibrations, etc., so that a large fitting force can be obtained when fixing. Because of this, a fairly strong press force is required for press-fitting.

By the way, for example, when proceeding with other work while aligning the light shielding plate 9, the light shielding plate 9, which is known to be removed from the press-fit pin 8 many times, should not be fixed to the press-fit pin 8. This makes it easier to remove and work on. However, in order to fix the above, first
The press-fitting hole 10 must be press-fitted up to B, and the press-fitting force required at this time is considerable for the reasons mentioned above, and the press-fitting and removal operations are time-consuming. I then pushed the light shielding plate 9 into the guide part 8A, and when I pushed it in a little, the instrument case 1
Even if the light shielding plate 9 is slightly moved, the light shielding plate 9 easily comes off from the press-fit pin 8 and becomes misaligned.

That is, the shape of the press-fitting pin 8 is such that a guide portion 8A for inserting and a root portion 8B for firmly fixing the press-fitting hole 10 are formed continuously with the guide portion 8A, so that it is temporarily or lightly fixed. In other words, the optimum fitting force for temporary fixing cannot be obtained, which makes temporary fixing work difficult and impairs workability.

[Means to solve the problem]

The present invention has been made to solve the above-mentioned disadvantages, and includes forming a plurality of press-fit pins in the case body of instruments, providing press-fit holes at positions corresponding to the press-fit pins in a press-fit member attached to the instruments, and In a device that fixes a press-fit member to instruments by press-fitting a press-fit pin into a press-fit hole, the press-fit member includes a guide portion formed by making the tip of the press-fit pin smaller in diameter than the diameter of the press-fit hole; Forming a temporary fixing part having a diameter between the diameter of the guide part and the diameter of the base part, which allows the press-fitting member to be temporarily fixed, between the base part and the base part having a diameter larger than the diameter of the press-fit hole to be fixed. It is characterized by what it did.

[Action]

Since the press-fitting pin is provided with a temporary fixing portion that can fix the press-fitting hole with an optimal fitting force for press-fitting into the press-fitting hole, the press-fitting member can be temporarily fixed to the press-fitting pin reliably and easily.

〔Example〕

FIG. 3 is a sectional view showing a first embodiment of the present invention.

In the figure, 21 is a press-fit pin protruding from the instrument case (not shown), and from its tip, the guide portion 2
1A, the temporary fixing part 21C, and the root part 21B are formed in this order. In other words, the temporary fixing part 21C is the guide part 21
The connecting portion between A and the root portion 21B is formed in a continuous arc shape. Reference numeral 22 denotes a light-shielding plate which is a press-fitting member, and this light-shielding plate 22 is provided with a press-fitting hole 22A.

The guide portion 21A of the press-fit pin 21 is formed to have a smaller diameter as it approaches the tip of the press-fit pin 21, making it easier to insert into the press-fit hole 22A.

Further, in the base portion 21B, the light shielding plate 22 is connected to the press-fit pin 2.
This is the fixed position of the press-fit hole 22A when it is assembled and fixed to the press-fit hole 22A, and is formed to be larger than the diameter of the press-fit hole 22A.

Further, the temporary fixing part 21C is formed between the guide part 21A and the base part 21B in order to temporarily fix it to the light shielding plate 22, and its diameter is somewhat smaller than that of the base part 21B, and the press-fit hole 22A is formed between the guide part 21A and the base part 21B. It is slightly larger than that of .

Next, the assembly of the light shielding plate 22 will be explained.

First, when firmly fixing or final fixing is performed, the press-fit hole 22A is fixed at the root portion 21B. Due to the difference in diameter between the press-fit hole 22A and the base portion 21B, a large force is required for press-fitting. This is because the fitting force generated between the press-fitting hole 22A and the root portion 21B during press-fitting acts largely due to the difference in diameter. This large fitting force is a necessary condition for preventing the press-fit hole 22A from separating from the press-fit pin 21 even under severe vibration.

However, when light fixing or temporary fixing is performed temporarily, the press-fit hole 22A is fixed by the temporary fixing part 21C. The temporary fixing part 21C has a slightly larger diameter than the press-fitting hole 22A, but it is smaller than the diameter of the root part 21B, and the fitting force generated during press-fitting is very weak compared to the above-mentioned permanent fixing. It's done smoothly. Even if relatively weak vibrations occur when the instrument case is moved, the press-fit hole 22A will not separate from the press-fit pin 21 due to the above-mentioned fitting force, and removal can be done as easily as press-fitting. .

That is, it is important that the shape of the press-fit pin 21 is devised so that different types of fitting forces can be obtained depending on the different work purposes of temporary fixing and permanent fixing when press-fitting the press-fit hole 22A into the press-fit pin 21. , in this embodiment, a press-fit pin 2 is used as a specific example.
1 is provided with a temporary fixing part 21C, which allows for easy press-fitting and removal of the press-fitting hole 22A,
Since it is difficult to dislodge from the press-fit pin 21 even when subjected to light vibrations, the efficiency of the temporary fixing work of the press-fit hole 22A and other work performed during the temporary fixing can be improved.

In addition, in the case of a plate-like rigid press-fitting member as in this embodiment, when inserting the pin 21 into the press-fitting hole 22A, the guide portion 21 is inserted into the cylindrical press-fitting hole 22A.
By locating A, it is possible to stabilize the number of press-fit pins 21 and press-fit holes 22A without providing more than necessary numbers, and to achieve the effect that temporary fixation can be achieved.

The shape of the pin is as shown in the second embodiment in FIG.
E. Even if the surface of the temporary fixing part 21F is not smoothly continuous, it is sufficient if the press-fitting member 22 can be press-fitted therein.

That is, the connection portion between the outer peripheral flat surface of the guide portion 21D of the pin 21 and the inclined tapered flat surface of the temporary fixing portion 21F is a corner, and the tapered flat surface of the temporary fixing portion 21F and the root portion 21E The connection part with the flat surface part which becomes the outer shape is formed by the corner part which becomes the ridge line, but the inner diameter dimension of the press-fit hole 22A provided in the press-fit member 22, the guide part 21D provided in each of the above-mentioned pins 21, the root part 21E, Temporary fixing part 21
By forming the outer diameter dimension with F to be similar to that of the above-mentioned embodiment, good fitting force for temporary fixation and permanent fixation can be obtained.

Note that the present invention can be achieved with pin shapes other than those shown in the above-mentioned embodiments as long as the tip has a small diameter and the press-fit member can be temporarily fixed. For example, the third embodiment shown in FIG. As shown in the example, a pin 31 has a shape similar to that of a conventional pin and has a smaller diameter than a press-fit hole (not shown).A protrusion 32 is provided on the outer periphery of the pin 31, except for the tip, so that the diameter increases toward the base. The tip of the pin 31 may be formed into a guide portion 31A, and the protrusion 32 may be pressed into the press-fit hole to press-fit the pin 31.Also, even if the planar cross section of the pin is not circular, it may fit into the press-fit hole. It goes without saying that the press-fit hole does not have to be circular as long as it can be press-fitted.

In addition, the present invention is not only applicable to the installation by press-fitting the light shielding plate as shown in the above embodiments, but also to attaching the press-fitting member to the instrument case when press-fitting the press-fitting pin into the press-fitting hole of the press-fitting member. It can be applied if it is attached by pressing from above the case body of the same type.

[Effect of idea]

According to the present invention, by forming a temporary fixing part in the press-fitting hole of the press-fitting member on the press-fitting pin formed in the case body of the instruments, it becomes easy to temporarily fix the press-fitting member to the instruments, and this temporary fixing is possible. Even if the case body is moved in this state or weak vibrations are applied, it is possible to obtain a structure with excellent workability during manufacturing, in which the press-fit member is less likely to be misaligned.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views showing conventional examples;
The figures are a sectional view of the first embodiment of the present invention, FIG. 4 is a sectional view of the second embodiment, and FIG. 5 is a perspective view of the third embodiment. 21, 31, 41... Press-fit pin, 22... Press-fit member, 22A, 33A, 42... Press-fit hole, 21
A, 21D, 31A...Guide part, 21B, 21
E, 31B...root, 21C, 21F, 31C
...temporary fixing part.

Claims (1)

[Scope of utility model registration request] Forming multiple press-fit pins in the instrument case body,
A press-fit hole is provided at a position corresponding to the press-fit pin of a press-fit member to be attached to the instruments, and the press-fit member is fixed to the instruments by press-fitting the press-fit pin into the press-fit hole, wherein the tip of the press-fit pin is fixed to the instrument. a guide portion formed with a diameter smaller than the diameter of the press-fit hole;
A diameter between the diameter of the guide portion that allows the temporary fixation of the press-fit member and the diameter of the base portion is between the base portion and the base portion, which is larger in diameter than the diameter of the press-fit hole that permanently fixes the press-fit member. A press-fit fixing structure for instruments, characterized by forming a temporary fixing part.