JP2001180329A - Parts assembly structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a parts assembly structure that is compact in shape and is efficient in assembly work. SOLUTION: A case 1 houses a measuring instrument 2, an odometer and a trip meter for indicating vehicle travel distances, an operating shaft 12 for resetting the distance indication of the trip meter, and the like. The front opening of the case 1 has a facing plate 7 for covering the gap between the measuring instrument 2 and another and between the measuring instrument 2 and the case 1, and a transparent plate 8. A circuit board 9 carries a bulb 10 for illuminating the measuring instrument 2, a tact switch 11 and the like. The operating shaft 12 has a substantially cylindrical operating portion 14, a pressure portion 15 for pushing the tack switch 11, a bottomed and substantially cylindrical boss portion 16 encircling the operating portion 14 in the middle of the operating shaft 12, and the like. The boss portion 16 has at the tip a sectional face 27 that is unlevel or is gently V-shaped with high and low points connected by curves. The rear surface of the facing plate 7 has a substantially cylindrical inserting portion 26 formed around a through hole 13 defined therein, and the lower end of the inserting portion 26 is inserted in the boss portion 16 of the operating shaft 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for assembling components constituting, for example, an instrument device for a vehicle.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 8, an instrument system for a vehicle includes an instrument 2 such as a speedometer or a tachometer in a synthetic resin case 1 and a so-called odometer or trip meter which indicates the traveling distance of the vehicle. (Not shown) is stored. These meters 2 are an instrument main body 3, a light guide plate 4 disposed in front of the instrument main body 3, a display plate 5 disposed in front of the light guide plate 4, and a rotating device according to the operation of the instrument main body 3. The moving pointer 6 is provided. 7 is the gap between each instrument 2 and the instrument 2
Reference numeral 8 denotes a see-through plate that covers the gap between the case 1 and the case 1, and 8 is a see-through plate that covers the front opening side of the case 1. Reference numeral 9 denotes a circuit board which is electrically connected to the meter 2 and has mounted thereon electronic components for driving the meter 2 and a bulb 10 as a light source for illuminating the display panel 5 and the pointer 6. It also has.

[0003] In such a meter device, the accumulator is often employed as an electronic display using a liquid crystal or the like, and is used for operations such as switching display of the accumulator and resetting a distance display to zero. Operating shaft 1 made of synthetic resin
2 is provided. The distal end side of the operation shaft 12 protrudes upward from insertion holes 13 and 13A provided in the dial plate 7 and the see-through plate 8. The operation can be performed by pressing the tact switch 11 provided on the circuit board 9 with the operation shaft 12. Here, FIG.
2 shows a cross section in a direction orthogonal to the operation shaft 12.

The operating shaft 12 has a cylindrical operating portion 14, a pressing portion 15 for pressing the tact switch 11, a bottomed cylindrical boss portion 16 provided around the operating portion 14 in the middle of the operating shaft 12, Two arm pieces 17 projecting outward from the periphery of the part 16
And an engaging portion 19 which is engaged with an engaging portion 18 of the case 1 described below below the arm piece 17. The locking portion 19 includes a locking piece 20 provided to be elastically deformable in the left-right direction, and a locking claw 21 protruding at a right angle to the tip of the locking piece 20. As shown in FIG. 9, two arm pieces 17 are provided in a direction orthogonal to the direction in which the locking pieces 20 are provided, and a bending piece 22 that can be elastically deformed vertically below the arm pieces 17 is provided. , The tip of which contacts the case 1.

The case 1 is provided with an engaging portion 18 at a position corresponding to the locking piece 20. As shown in FIG.
The tip of the bending piece 22 and the operating shaft 12 are provided between the ribs 23.
Does not move significantly in the left-right direction. Further, a peripheral wall 25 having an inclined surface is provided around the hole 24 through which the pressing portion 15 is inserted, so that the pressing portion 15 can be easily inserted into the hole 24 when the operation shaft 12 is set in the case 1. In addition,
A cylindrical insertion portion 2 is provided around the insertion hole 13 on the back side of the return plate 7.
The lower end of the insertion portion 26 is inserted into the boss 16 of the operation shaft 12. By doing so, even when the bulb 10 is turned on, the light is prevented from leaking upward through the insertion hole 13 provided in the dial plate 7.

[0006] The assembling of the instrument device configured as described above is as follows.
The case 1 is placed on the circuit board 9 and the operation shaft 1 is placed in the case 1.
2 and the instrument 2 are stored, and the insertion hole 13 of the return plate 7 is inserted.
Through the operation unit 14 of the operation shaft 12 to connect the return plate 7 to the instrument 2
Assemble to the front side of. In the same manner, the transparent plate 8 is
To the front opening side of The dimensional relationship between the insertion holes 13 and 13A provided in the dial plate 7 and the see-through plate 8 and the operation unit 14 is not that in which the operation shaft 12 is fixed to the case 1 or that the operation shaft 12 is securely positioned. Therefore, there is a possibility that the operation unit 14 and the facing plate 7 or the see-through plate 8 may be assembled in a tilted or misaligned manner. It has become. When the tact switch 11 is pressed, the operating portion 14 of the operating shaft 12 protruding forward from the insertion hole 13A of the see-through plate 8 is pushed downward as described above, so that the bending piece 22 is bent. The operation shaft 12 moves down, and the pressing portion 15 presses the tact switch 11 to reset the distance display of the trip meter to zero. Thereafter, the operation shaft 12 returns to the original position due to the elasticity of the bending piece 22.

[0007]

However, when assembling the return plate 7 as described above, if the operating shaft 12 is tilted or displaced and is mounted on the case 1, the position of the boss 16 of the operating shaft 12 may be reduced. In contrast, the insertion portion 26 of the return plate 7 is to be inserted in a state where it is biased to one side.
Then, the lower end of the insertion portion 26 abuts on the tip of the boss portion 16, and the insertion portion 26 may not enter the boss portion 16 smoothly. Alternatively, even when the operation shaft 12 is not tilted or displaced, if the insertion portion 26 of the return plate 7 is to be inserted in a state of being biased to one side, the insertion portion 26 similarly does not smoothly enter the boss portion 16. Sometimes. This tendency is stronger because the boss 16 of the operation shaft 12 and the insertion portion 26 of the return plate 7 are not visible when the return plate 7 is assembled.

As one method for solving such a state, even if there is a radial displacement between the operation shaft 12 and the insertion portion 26 of the return plate 7, the insertion portion 26 provided on the return plate 7 is provided. It is sufficient to provide a large guide to the boss 16 so that the boss 16 can be smoothly inserted into the boss 16 of the operation shaft 12, but it is necessary to increase the radial dimension of the boss 16 and, The device may become large or affect lighting.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide an assembling structure of parts having a compact shape and good assembling workability.

[0010]

According to the present invention, there is provided a first component having a substantially cylindrical boss portion and a first component having an insertion portion inserted into the boss portion of the first component. And an assembling structure with the second component, wherein a cut surface at the tip of the boss portion is formed at a height.

Further, the cut surface has a chamfer at a corner on the center side of the boss.

The cut surface has an inclined surface inclined toward the center of the boss.

In addition, a restricting portion for preventing the periphery of the insertion portion from moving outside the periphery of the boss portion is provided between the first component and the second component.

[0014] Further, there is provided an assembling structure of a first component having a substantially cylindrical or hollow square boss portion and a second component having an insertion portion inserted into the boss portion of the first component. The cut surface at the tip of the boss has an inclined surface inclined toward the center of the boss, and a restricting portion for preventing the periphery of the insertion portion from moving outside the periphery of the boss. And the second component.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to each embodiment. In the same manner as in the conventional example, an instrument device for a vehicle is used, and the same or corresponding parts as those in the conventional example are denoted by the same reference numerals. , And a detailed description thereof will be omitted. In each embodiment, the first component is an operation axis, and the second component is a return plate.

1 to 6 show a first embodiment of the present invention. The operating shaft 12 has a substantially cylindrical operating portion 14, a pressing portion 15 for pressing the tact switch 11, a substantially cylindrical bottomed boss portion 16 provided around the operating portion 14 in the middle of the operating shaft 12, and the boss portion. The arm 17 includes two arms 17 projecting outward from the periphery of the arm 16, and a locking portion 19 that is engaged below an arm 17 with an engaging portion 18 of the case 1 described below. The locking portion 19 includes a locking piece 20 provided to be elastically deformable in the left-right direction, and a locking claw 21 protruding at a right angle to the tip of the locking piece 20. Boss part 1
The cut surface 27 at the six tips is not a uniform height but a height (a gentle V-shape in the case of the present embodiment), and has a shape in which a high portion and a low portion are connected by a curve. Further, as shown in FIG. 4, the cut surface 27 has an R-shaped chamfer 28 at a corner on the center side of the boss 16. Also, as shown in FIG. 2, the direction orthogonal to the direction in which the locking pieces 20 are provided is
An arm 17 of the book and a bent piece 22 that can be elastically deformed in the vertical direction are provided below the arm 17, and the tip of the bent piece 22 is in contact with the case 1. The cut surface 27 may be an inclined surface 29 inclined toward the center of the boss 16 as shown in FIG. The boss portion 16 may have an approximate shape even if the cut end is not a circular cylinder.

The case 1 is provided with an engaging portion 18 at a position corresponding to the locking piece 20. As shown in FIG.
The tip of the bending piece 22 and the operating shaft 12 are provided between the ribs 23.
Does not move significantly in the left-right direction. Further, a peripheral wall 25 having an inclined surface is provided around the hole 24 through which the pressing portion 15 is inserted, so that the pressing portion 15 can be easily inserted into the hole 24 when the operation shaft 12 is set in the case 1. In addition,
A substantially cylindrical insertion portion 26 is provided around the insertion hole 13 on the back side of the return plate 7, and the lower end of the insertion portion 26 is
Is inserted into the boss portion 16. By doing so, even if the bulb 10 is turned on, the light is transmitted to the return plate 7.
So that it does not leak upward through the insertion hole 13 provided in the hole.

The assembling of the instrument device configured as described above is as follows.
After placing the case 1 on the circuit board 9 and storing the operating shaft 12 and the instrument 2 in the case 1 in the same manner as in the conventional example, the operating plate 14 of the operating shaft 12 is passed through the insertion hole 13 of the return plate 7 through the operating plate 14. 7 is attached to the front side of the instrument 2. At this time, since the boss portion 16 is substantially cylindrical and the cut surface 27 at the tip is high and low, the operating shaft 12 is slightly tilted or misaligned and is assembled to the case 1. Even when the lower end of the insertion portion 26 abuts against the cut surface 27 on the high side at the tip of the boss portion 16 in a state of being biased, or when the operation shaft 12 is not inclined or displaced, the insertion portion 2 of the return plate 7
6 Even if the lower end of the boss 16 abuts against the high cut surface 27 at the tip of the boss 16, the lower end moves along the cut surface 27 toward the center of the boss 16. The lower end of the insertion portion 26 is inserted into the boss portion 16. As described above, the lower end of the insertion portion 26 can easily enter the boss portion 16 only by raising or lowering the cut surface 27 at the tip of the boss portion 16 without increasing the diameter of the boss portion 16 and providing an invitation. Thus, the workability of assembling the return plate 7 is improved.

As shown in FIG. 4, since the cut surface 27 has a chamfer 28 having a curved surface at the corner on the center side of the boss 16, the insertion portion 26 of the return plate 7 is inserted into the boss 16. Easy to enter. As shown in FIG. 5, when the cut surface 27 is an inclined surface 29 inclined toward the center of the boss 16, the insertion portion 26 of the return plate 7 is more easily inserted into the boss 16. In this way, the chamfer 28 is applied to the cut surface 27,
By providing the inclined surface 29, even if the lower end of the insertion portion 26 of the return plate 7 abuts against the cut surface 27 on the lower side of the tip of the boss portion 16 in a state of being biased, the lower end side of the insertion portion 26 becomes the boss portion 1
6, the workability of assembling the return plate 7 is further improved.

Further, the boss 1 of the operation shaft 12 according to the present embodiment.
6 and the insertion portion 26 of the return plate 7 include a substantially cylindrical operating portion 14 at the center of a substantially cylindrical boss portion 16 as shown in each drawing.
Is located. A substantially cylindrical insertion portion 26 is inserted between the operation portion 14 and the boss portion 16, and the parts of the respective components are, as shown in FIG. Even if it is biased to one side, the outer periphery of the insertion portion 26 does not protrude from the outer periphery of the boss portion 16 with the operation portion 14 serving as a stopper, and the lower end of the insertion portion 26 is
6 is in contact with the cut surface 27. That is, the operation portion 14 of the operation shaft 12 serves as a restricting portion for the insertion portion 26 so that the periphery of the insertion portion 26 does not move outward from the periphery of the boss portion 16.

With this configuration, the return plate 7
Even if the maximum deviation occurs, the lower end of the insertion portion 26 is securely brought into contact with the cut surface 27 formed at a height, or the cut surface 27 provided with the R-shaped chamfer 28 or the inclined surface 29, so that it is visually observed. Even in places where the return plate 7 cannot be inserted, the insertion portion 26 of the return plate 7 can easily enter the boss portion 16 of the operation shaft 12, and the workability of assembling the return plate 7 is further improved.

FIG. 7 shows a second embodiment of the present invention, which is different from the first embodiment only in the operation axis, and the other parts are the same. Boss 16A of operation shaft 12A
Has a substantially cylindrical shape, and a cut surface 27 at the tip of the boss 16A has a uniform height and is an inclined surface 28 inclined toward the center of the boss 16A. The boss 16 of the operation shaft 12A is also provided.
A and the insertion portion 26 of the return plate 7 are the same as those in the first embodiment. Even if the return plate 7 is biased to one side with respect to the operation shaft 12A, the operation unit 14 serves as a stopper. Thus, the outer periphery of the insertion portion 26 does not protrude from the outer periphery of the boss portion 16A, and the lower end of the insertion portion 26 is in contact with the cut surface 27 of the boss portion 16A. That is, the operation portion 14 of the operation shaft 12A serves as a restricting portion for the insertion portion 26 so that the periphery of the insertion portion 26 does not move outward from the periphery of the boss portion 16A. The boss portion 16A is not limited to a cylindrical shape, but may be a square shape, and the insertion portion 26 of the dial plate 7 inserted into the boss portion 16A may not be a cylindrical shape.

With this structure, even if the return plate 7 is maximally deviated as in the first embodiment, the lower end of the insertion portion 26 reliably comes into contact with the cut surface 27, and the cut surface 27 Has a slope 29, the insertion portion 26 moves toward the center of the boss 16A along the slope 29 and is inserted into the boss 16A. Thus, the boss 16A
Without increasing the diameter of the boss 16A, the cut surface 27 at the tip of the boss 16A is merely an inclined surface 29 inclined toward the center.
The workability of assembling the return plate 7 is further improved.

The present invention is not limited to the above embodiments, and the same structure may be adopted when assembling the see-through plate and the return plate or the return plate and the case.

[0025]

According to the first aspect of the present invention, when the first component and the second component are assembled, the boss portion of the first component is mounted even if the assembly is performed with one side biased. Without increasing the diameter of the boss and providing an invitation, only the height of the cut surface at the tip of the boss portion is lowered, and the lower end of the insertion portion of the second component abutting in a state biased toward the cut surface is lowered, and By moving along the cut surface toward the center of the boss portion, the lower end side of the insertion portion easily enters the boss portion, and the workability of assembling parts is improved.

According to the second aspect of the present invention, even if the lower end of the insertion portion of the second component abuts against the cut surface on the lower side of the tip of the boss portion of the first component in a state biased, the lower end of the insertion portion is formed. The side is easy to enter into the boss portion, and the workability of assembling parts is further improved.

According to the third aspect of the present invention, even if the lower end of the insertion portion of the second component abuts against the cut surface on the lower side of the tip of the boss portion of the first component in a state of being biased, the lower end of the insertion portion. The side is easy to enter into the boss portion, and the workability of assembling parts is further improved.

According to a fourth aspect of the present invention, when assembling the first component and the second component, even if the assembling is performed in a state where the first component and the second component are biased to one side at the maximum, the second component is controlled by the regulating portion. The lower end of the insertion portion does not protrude beyond the periphery of the boss portion of the first component, and the lower end of the insertion portion abuts on the cut surface, and the lower end of the insertion portion is formed by the height of the cut surface, or the chamfer or the inclined surface. It ’s easier to get inside the boss,
The workability of assembling parts is improved.

According to a fifth aspect of the present invention, when assembling the first component and the second component, even if the assembly is performed in a state where the first component and the second component are biased to one side at the maximum, the second component is controlled by the regulating portion. The lower end of the insertion portion abuts on the cut surface without the outer periphery of the insertion portion protruding beyond the periphery of the boss portion of the first component, and the lower end side of the insertion portion is inserted into the boss portion by the inclined surface provided on the cut surface. It is easy to enter, and the workability of assembling parts is improved.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of an instrument device according to a first embodiment of the present invention.

FIG. 2 shows the same embodiment, and is a partial cross-sectional view of the instrument device in a direction orthogonal to FIG. 1;

FIG. 3 is an exemplary perspective view showing an operation shaft according to the embodiment;

FIG. 4 is a partial cross-sectional view showing a boss of the operation shaft of the embodiment.

FIG. 5 is a partial cross-sectional view of a boss of the operation shaft, showing a modification of the embodiment.

FIG. 6 is a partial sectional view showing an assembled state of the return plate of the embodiment.

FIG. 7 is a partial sectional view of an operation shaft showing a second embodiment of the present invention.

FIG. 8 is a partial sectional view showing a conventional meter device.

FIG. 9 is a partial cross-sectional view showing a conventional instrument device, which is orthogonal to FIG.

[Explanation of symbols]

 7 Return plate (second part) 12, 12A Operation shaft (first part) 14 Operation part (restriction part) 16, 16A Boss part 26 Insertion part 27 Cut surface 28 Chamfer 29 Inclined surface

Claims (5)

[Claims] 1. An assembling structure of a first component having a substantially cylindrical boss portion and a second component having an insertion portion inserted into the boss portion of the first component, wherein the first component has a boss portion. A part assembling structure, characterized in that the cut surface at the tip of the part is formed at a height. 2. The component mounting structure according to claim 1, wherein the cut surface has a chamfer at a corner on the center side of the boss. 3. The assembly structure according to claim 1, wherein the cut surface has an inclined surface inclined toward the center of the boss. 4. The device according to claim 1, wherein a regulating portion for preventing the periphery of the insertion portion from moving outside the periphery of the boss portion is provided between the first component and the second component.
The assembly structure of the component according to any one of the above. 5. An assembling structure of a first component having a substantially cylindrical or hollow angular boss portion, and a second component having an insertion portion inserted into the boss portion of the first component. The cut surface at the tip of the boss has an inclined surface inclined toward the center of the boss, and a restricting portion for preventing the periphery of the insertion portion from moving outward from the periphery of the boss.
A component assembling structure provided between the first component and the second component.