JP6872147B2 - Instrument - Google Patents

Description

The present invention relates to an instrument mounted on a vehicle or the like.

Vehicles such as automobiles and motorcycles are equipped with instruments having a speedometer, a tachometer, and a liquid crystal display device that digitally displays necessary information. The instrument has a rod-shaped knob, and receives user instructions such as display switching and reset via the knob. The operation of the knob is transmitted to the switch on the circuit board, and the instruction is executed.

Japanese Unexamined Patent Publication No. 2012-59377

The knob is attached to the circuit board. Further, since the circuit board is covered with a member such as a case, the member such as the case is provided with a through hole for the knob to penetrate.

Here, when a member such as a case is attached to the circuit board after the knob is attached to the circuit board, the member such as the case is attached to the circuit board through the step of inserting the rod-shaped knob into the through hole. However, when the through hole is inserted, the knob comes into contact with the case, so that the knob moves, and this knob may come into contact with an element on a circuit board such as a switch and be damaged.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide an instrument capable of improving workability at the time of assembly.

In order to solve the above-mentioned problems, the instrument according to the present invention is attached to the substrate, the front surface, the back surface facing the substrate, the through hole, and the back surface side of the through hole. A case having a protrusion provided in the through hole and protruding toward the center from the peripheral edge of the through hole, a shaft having a base inserted into the through hole, attached to the substrate, and fixed to the substrate, and the above. A knob having a first collar provided on the shaft and a second collar provided on the base side of the shaft with a notch, and the protrusion has the knob. When it is inserted from the back surface side to the front surface side, it contacts the first collar to hinder the attachment to the substrate, and when the knob is inserted from the front surface side to the back surface side, the first in the notch. It can be mounted on the substrate without contacting the collar of 2.

In the instrument according to the present invention, workability at the time of assembly can be improved.

It is an embodiment of the instrument which concerns on this invention, and is the perspective view explaining the whole structure. An exploded perspective view of the instrument of FIG. Enlarged perspective view of the middle case. Enlarged perspective view of the knob. Top view of the knob and inner case mounted on the circuit board. FIG. 5 is a vertical cross-sectional view taken along the line VI-VI of FIG.

An embodiment of the instrument according to the present invention will be described with reference to the accompanying drawings. The instrument according to the present invention is mounted on a vehicle such as an automobile or a motorcycle, a ship, or an agricultural machine. In the present embodiment, an example in which the instrument according to the present invention is mounted on an automobile will be described.

FIG. 1 is an embodiment of an instrument according to the present invention, and is a perspective view illustrating an overall configuration.

FIG. 2 is an exploded perspective view of the instrument 1 of FIG.

FIG. 3 is an enlarged perspective view of the middle case 31.

FIG. 4 is an enlarged perspective view of the knob 10.

In the following description, the "front side" means the front side in FIG. 1, and the "back side" means the back side in FIG.

The instrument 1 includes a speedometer 2, a tachometer 3, and a liquid crystal display device 4. The liquid crystal display device 4 is arranged so as to be sandwiched between the speedometer 2 and the tachometer 3.

The speedometer 2 and the tachometer 3 have a pointer 11, a dial 12, and a decorative member 13. The pointer 11 (omitted in FIG. 2) rotates with the pointer axis as the axis. The dial 12 is, for example, a thin plate and has an index 16 indicated by a pointer 11. The dial 12 is provided on the back side of the pointer 11, and is a scale, characters, symbols, and the like. The decorative member 13 is provided on the front surface side of the dial 12 so as to surround the operating region of the pointer 11. The decorative member 13 is, for example, a synthetic resin having a ring shape. The surface of the decorative member 13 has a metallic mirror luster in order to enhance the decorativeness. The luster is imparted by plating such as chrome plating.

The liquid crystal display device 4 (hereinafter, simply referred to as “display device 4”) includes, for example, a liquid crystal display element in which liquid crystal molecules are sealed between a pair of glass substrates. A plurality of electrode terminals that are electrically connected to the flexible printed circuit board 22 are provided at the ends of the liquid crystal display element.

The instrument 1 further includes a case 6, a visor 7, a cover plate 8, a circuit board 9, and a knob 10.

The case 6 has an inner case 31 and an outer case 32. A dial 12, a decorative member 13, a pointer 11, and a visor 7 are arranged on the front side of the middle case 31. A display device 4, a circuit board 9, and an outer case 32 are arranged on the back surface 31a (FIG. 6) of the inner case 31. The middle case 31 is attached to the circuit board 9 so that the back surface 31a side faces each other. Further, the middle case 31 has a through hole 31c and a protrusion 31d. The shaft 41 of the knob 10 penetrates the through hole 31c. The protrusion 31d is provided on the back surface 31a side of the through hole 31c. The protrusion 31d projects from the peripheral edge of the through hole 31c toward the center of the through hole 31c. When the knob 10 is inserted from the back surface 31a side to the front surface 31b side, the protrusion 31d comes into contact with the first flange 42 (described later) and hinders the attachment to the circuit board 9. When the knob 10 is inserted from the front surface 31b side to the back surface 31a side, the protrusion 31d enables attachment to the circuit board 9 without contacting the second flange 43 (described later) in the notch 43a. The protrusion 31d is inclined so as to increase in height from the front surface 31b of the middle case 31 toward the back surface 31a. The outer case 32 covers the circuit board 9 from the back side of the instrument 1 and is fixed to the inner case 31.

The visor 7 blindfolds the gap between the dial 12 and the case 6. The cover plate 8 is made of, for example, a transparent synthetic resin. The cover plate 8 covers the opening 7a of the visor 7 so that dust and the like do not enter the speedometer 2, the tachometer 3, and the display device 4.

The circuit board 9 is a hard substrate made of, for example, a glass epoxy-based material. The circuit board 9 is electrically connected to each electrode terminal of the glass substrate of the display device 4 via the flexible printed circuit board 22. The circuit board 9 has a light source for transmitting and illuminating the index 16 and transmitting and illuminating a liquid crystal display element and the like. Further, the circuit board 9 has a push-type front switch provided on the front surface of the circuit board 9 and a rotary rear switch provided on the back surface (both not shown). When these switches are pressed or rotated, they perform processes such as resetting the meter, switching the display contents, and adjusting the brightness.

The knob 10 is made of a rod-shaped opaque resin. The knob 10 is inserted into the through hole 31c of the inner case 31 and the through hole of the dial 12, the visor 7, and the cover plate 8 and is rotatably and pushably attached to the circuit board 9. The knob 10 has a shaft 41, a first collar 42, and a second collar 43. The shaft 41 is a rod-shaped member, and has a base portion 45 fixed to the circuit board 9 on one end side and an operation portion 46 operated by the user on the other end side. The first collar 42 is a collar-shaped member provided on the shaft 41. The first collar 42 shields the member on the back side of the inner case 31 in the through hole 31c, that is, the circuit board 9. The second collar 43 is a collar-shaped member provided on the shaft 41 on the base 45 side of the first collar 42 of the shaft 41. The second brim 43 has a notch 43a. Further, the knob 10 has a hook 47, a front switch operation unit 48, and a rear switch operation unit 49. The hook 47, the front switch operating unit 48, and the rear switch operating unit 49 are provided on the second collar 43. The hook 47 is hooked on the circuit board 9 and fixes the knob 10 to the circuit board 9. The front switch operation unit 48 presses the front switch of the circuit board 9. The rear switch operation unit 49 rotates the rear switch of the circuit board 9. In these switch operation units 48 and 49, the knob 10 further has a spring 50 (FIG. 6) that pushes back the pressing of the knob 10 by the user.

Next, the operation of the instrument 1 in the present embodiment when the knob 10 and the inner case 31 are attached to the circuit board 9 will be described.

FIG. 5 is a plan view of the knob 10 and the inner case 31 attached to the circuit board 9.

FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG.

First, the middle case 31 is attached to the circuit board 9. Next, the base 45 of the knob 10 is inserted into the through hole 31c from the front surface 31b side of the middle case 31. At this time, the knob 10 is inserted so that the position of the notch 43a of the second collar 43 is aligned with the position of the protrusion 31d. Therefore, the protrusion 31d does not hinder the insertion of the knob 10. Further, the protrusion 31d is inclined so as to increase in height from the front surface 31b to the back surface 31a. Therefore, the second flange 43 can be smoothly inserted without being caught by the protrusion 31d. The hook 47 of the knob 10 is caught by being pushed into the hole 9a of the circuit board 9. As a result, the knob 10 is fixed to the circuit board 9 so that it can be rotated and pressed.

Here, the assembly procedure of the instrument 1 in the present embodiment is regulated so that the knob 10 is attached to the circuit board 9 after the middle case 31 is attached to the circuit board 9. That is, the knob 10 can be inserted only from the front surface 31b side of the middle case 31, and the insertion is hindered from the back surface 31a side. When the middle case 31 is attached to the circuit board 9 after the knob 10 is attached to the circuit board 9, the knob 10 wobbles or moves when it comes into contact with the middle case 31, and a switch or the like on the circuit board 9 or the like. This is because there is a risk of damaging the element of.

Regulation of the assembly procedure is realized by the knob 10 having a first collar 42 and a second collar 43, and the middle case 31 having a protrusion 31d. Specifically, when the knob 10 is inserted from the back surface 31a side of the inner case 31, that is, when the inner case 31 is attached to the circuit board 9 after the knob 10 is attached to the circuit board 9, the protrusion 31d is the first. It comes into contact with the collar 42 of 1 and hinders the attachment to the circuit board 9. On the other hand, when the knob 10 is inserted from the front surface 31b side of the middle case 31, that is, when the knob 10 is attached to the circuit board 9 after the middle case 31 is attached to the circuit board 9, the second collar 43 Since the notch 43a is provided, the protrusion 31d can be attached to the circuit board 9 without coming into contact with the second flange 43 in the notch 43a.

As a result, the assembly worker can intuitively understand the correct assembly procedure, and can prevent the element on the circuit board 9 from being damaged due to the incorrect assembly procedure. Therefore, the instrument 1 in the present embodiment can improve workability at the time of assembly.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

1 Instrument 2 Speedometer 3 Tachometer 4 Liquid crystal display device (display device)
6 Case 7 Visor 7a Opening 8 Cover plate 9 Circuit board 9a Hole 10 Knob 11 Pointer 12 Dial 13 Decorative member 16 Index 22 Flexible printed circuit board 31 Middle case 31a Back 31b Front 31c Through hole 31d Protrusion 32 Outer case 41 Axis 42 1st Tsuba 43 Second brim 43a Notch 45 Base 46 Operation unit 47 Hook 48 Front switch operation unit 49 Rear switch operation unit 50 Spring

Claims (3)

A board with a switch and
A case attached to the substrate and having a front surface, a back surface facing the substrate, a through hole, and a protrusion provided on the back surface side of the through hole and protruding from the peripheral edge of the through hole toward the center. When,
A shaft having a base portion inserted into the through hole, attached to the substrate, and fixed to the substrate, a first collar provided on the shaft, and the base side of the shaft from the first collar. A second brim with a notch provided and a knob with.
When the knob is inserted from the back surface side to the front surface side, the protrusion contacts the first collar to hinder the attachment to the substrate, and the knob is inserted from the front surface side to the back surface side. In this case, an instrument that can be mounted on the substrate without contacting the second collar in the notch. The instrument according to claim 1, wherein the protrusion is inclined so as to increase in height from the front surface toward the back surface. The instrument according to claim 1 or 2, wherein the first collar shields a member on the back surface side of the case in the through hole.

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