JP7275975B2 - instrumentation - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to an instrument device mounted on a vehicle such as an automobile.

2. Description of the Related Art A vehicle such as an automobile is equipped with an instrument device for displaying information necessary for driving, such as a speedometer and an engine tachometer. An instrumentation device uses, for example, a hook and a structure for hooking the hook to connect and integrate multiple structures.

For example, an instrument device may have a dial with indicators such as scales and numbers, a pointer shaft passing through a hole provided in the dial, and a pointer connected to the tip of the pointer shaft to indicate the index. Such an instrument device uses a ring-shaped mounting member having a hook in order to prevent the dial from floating, which may interfere with the hands. Specifically, by attaching the attachment member to the periphery of the hole described above, the hook is caught on a member such as the light guide or the case located behind the dial. The attachment member is attached to a dial plate as a member to be attached, a light guide body, a case, or the like, and can be fixed by sandwiching them.

JP-A-2005-214823

Today's instrument devices tend to have larger pointers in order to improve the design of the pointers. For this reason, the attachment member tends to be large, and the number of hooks to be hooked on the attached member tends to increase. When the number of hooks increases, the task of removing the attachment member is not easy, and there is a problem that the work efficiency is lowered.

The present disclosure has been made in consideration of such circumstances, and an object thereof is to provide a measuring instrument device capable of improving work efficiency.

In order to solve the above-described problems, the pointer-type instrument device of the present disclosure includes: a member to be mounted having a hole having a hole axis that matches the mounting direction; a mounting member that is fixed to the member to be mounted by being mounted, the mounting member comprising a peripheral wall extending in an axial direction coinciding with the hole axis, and a rear end side of the peripheral wall with respect to the mounting direction. a surface extending in a direction perpendicular to and away from the axis of the peripheral wall, and a pressing portion that presses the member to be attached in the mounting direction; a base surface extending in an approaching direction; an elastic member provided on a surface of the base surface facing the mounting direction and extending with an inclination with respect to the mounting direction; a hook provided at the tip of the elastic member; a through hole provided in a surface overlapping with the elastic member when viewed in the mounting direction, the mounting member being fixed to the mounted member via the holding portion and the hook, and the elastic When the member overlaps the through hole and is pressed substantially in the mounting direction, the member bends in a direction in which the hook is not caught on the mounted member.

In the instrument device of the present disclosure, working efficiency can be improved.

The front view which shows the measuring instrument device which is embodiment of the measuring instrument device of this indication. Sectional drawing which follows the II-II line of FIG. Sectional drawing which follows the III-III line of FIG. FIG. 4 is a perspective view of a combined light guide and mounting member; FIG. 4 is a perspective view showing the light guide from the front; The perspective view shown from the back of a light guide. The perspective view shown from the front of an attachment member. The perspective view shown from the back of an attachment member. Explanatory drawing at the time of removing an attachment member using a removal tool. Sectional drawing corresponding to FIG. 3 of the measuring instrument apparatus as a modification.

An embodiment of the instrument device of the present disclosure will be described based on the accompanying drawings. The instrument device of the present disclosure is mounted, for example, on vehicles such as automobiles and motorcycles, ships, agricultural machinery, and construction machinery. In this embodiment, the instrument device of the present disclosure will be described using an example in which the instrument device is installed in the instrument panel of an automobile.

FIG. 1 is a front view showing a meter device 1 that is an embodiment of the meter device of the present disclosure.
FIG. 2 is a cross-sectional view taken along line II--II of FIG.
FIG. 3 is a cross-sectional view taken along line III--III in FIG.

In the following description, "front (front)", "rear (rear)", "upper", "lower", "right" and "left" are According to the definitions "Fr.", "Re.", "To.", "Bo.", "R" and "L". The side where the instrument device 1 is visually recognized by the user is defined as "front".

The instrument device 1 has a speedometer 2 and an engine tachometer 3 . The speedometer 2 is a pointer-type (mechanical) instrument that displays the speed of the vehicle. The engine speed meter 3 is a pointer-type instrument that displays the engine speed of the vehicle.

The instrument device 1 mainly has a case 10 , a dial 20 , a circuit board 30 , a light guide 40 and a mounting member 50 .

The case 10 has an outer case 11 and an inner case 15 .

The outer case 11 (not shown in FIGS. 2 and 3) is made of black resin (eg, polypropylene). The outer case 11 accommodates the dial 20, the hands 33, the inner case 15 and the circuit board 30 in its internal space. The outer case 11 has an opening 13 on the front side, and the opening 13 is covered with the translucent plate 12 . The outer case 11 protects the inside from dust and the like.

The middle case 15 is made of white synthetic resin (for example, polypropylene). The middle case 15 fixes the dial 20 in the internal space of the outer case 11 and acts as a light shielding wall for the light sources 35 and 36 .

The dial 20 is a thin plate-like member and has a base material and a light shielding layer. The base material is, for example, a transparent polycarbonate resin, and is a transparent thin plate. The light-shielding layer is a printed layer printed with black light-shielding ink and formed on the front surface (or back surface) of the substrate. The light shielding layer has a blanked character portion corresponding to the shape of the index 21 . The indicators 21 are numbers, letters, symbols, and scales. The index 21 is lit and displayed by transmitting light from the index light source 35 .

The dial 20 has a circular pointer shaft hole 22 that exposes a pointer shaft 32 at approximately the center of the speedometer 2 and the engine tachometer 3 . The pointer shaft hole 22 (hole) has a hole axis that coincides with the front to rear direction as the mounting direction. Hereinafter, the "mounting direction" may simply be referred to as the direction from the front to the back or the front-back direction (when the direction is irrelevant).

The circuit board 30 is provided behind the dial 20 (on the mounting direction side of the mounting member 50). The circuit board 30 mainly includes a pointer driving section 31, an indicator light source 35, a pointer light source 36, and a control section including drivers for the pointer driving section 31 and the light sources 35 and 36, and the like.

The control unit has a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc., and executes predetermined arithmetic processing according to a program written in the ROM, for example. The control unit, for example, acquires various vehicle information from an ECU (Electronic Control Unit) of the vehicle. Based on the acquired information, the control unit drives the pointer driving unit 31 and lights the light sources 35 and 36 .

The pointer drive unit 31 rotates the pointer shaft 32 in accordance with the input running speed of the vehicle and engine speed. The pointer shaft 32 is made of a metal rod-shaped member that extends forward (extends) perpendicularly to the circuit board 30 . The pointer shaft 32 extends in a direction coinciding with the hole axis of the pointer shaft hole 22 . The pointer shaft 32 is connected to the pointer 33 at its tip.

The pointer 33 points to the scale of the index 21 by rotating on the front surface 20 a of the dial 20 . The pointer 33 is made of translucent resin (for example, polycarbonate resin) and is illuminated by the light from the pointer light source 36 to emit light.

The indicator light source 35 and pointer light source 36 are provided on the front surface 30a of the circuit board 30, and are, for example, top-view type (upper surface emitting type) LEDs (Light Emitting Diodes). A required number of index light sources 35 are provided behind the index 21 . A transparent diffusion plate 38 made of polycarbonate resin, for example, is provided in front of the index light source 35 . The index light source 35 diffuses the light of the index light source 35 with a diffusion plate 38 to indirectly illuminate the index 21 . The pointer light source 36 guides light to the pointer 33 through the light guide 40 and indirectly illuminates the pointer 33 . Four pointer light sources 36 are provided around the pointer driving portion 31 (pointer shaft 32). The pointer light source 36 is arranged at a position around the pointer shaft 32 corresponding to the position of an elastic member 56 to be described later.

The circuit board 30 also has a positioning hole 39 for positioning the light guide 40 .

The light guide 40 is made of transparent resin (for example, polymethyl methacrylate (PMMA)). The light guide 40 is positioned and fixed to the circuit board 30 on the outer circumference of the pointer shaft 32 . The light guide 40 guides the light from the pointer light source 36 to the pointer 33 . Details of the light guide 40 will be described later.

The mounting member 50 is a ring-shaped member made of black resin (for example, polycarbonate resin). The attachment member 50 is a member for pressing the dial plate 20 from the front to the rear by being attached to the pointer shaft hole 22 . The mounting member 50 is fixed to the dial plate 20 and the light guide member 40 by being attached to the dial plate 20 and the light guide member 40 as members to be attached from the front to the rear through the pointer shaft hole 22 . be done.

Next, details of the light guide 40 and the mounting member 50 will be described.

4 is a perspective view of the combined light guide 40 and mounting member 50. FIG.
FIG. 5 is a perspective view showing the light guide 40 from the front.
FIG. 6 is a perspective view showing the light guide 40 from behind.
FIG. 7 is a front perspective view of the mounting member 50. FIG.
FIG. 8 is a perspective view showing the mounting member 50 from the rear.

The light guide 40 has a light guide portion 41 , a positioning protrusion 45 , a hook receiving surface 46 , a leg accommodation portion 47 and a support portion 48 . The light guide portion 41 is positioned at the center of the light guide 40 . The positioning projection 45 , the hook receiving surface 46 , the leg accommodation portion 47 , and the support portion 48 are partially connected to the outer circumference of the light guide portion 41 , so that they are arranged with a certain gap 49 from the light guide portion 41 . be.

The light guide portion 41 is a substantially annular member that has a hole 42 in the center for the pointer shaft 32 to pass through and extends a certain length in the front-rear direction. The light guide section 41 has a light receiving section 43 and an emitting section 44 . The light receiving portion 43 is formed on the rear end surface of the light guide portion 41 . The light receiving section 43 faces the pointer light source 36 and receives light from the pointer light source 36 . The emitting portion 44 is formed on the front end face of the light guiding portion 41 . The emitting portion 44 emits the light that has entered the inside of the light guide portion 41 from the light receiving portion 43 toward the pointer 33 .

The positioning projections 45 are three rod-shaped members extending rearward. The positioning protrusions 45 are inserted into the positioning holes 39 of the circuit board 30 and are hooked on the rear surface 30 b of the circuit board 30 to position the light guide 40 on the circuit board 30 .

The hook receiving surface 46 is a rearward facing surface that receives the hook 57 when the mounting member 50 is attached to the light guide 40 . The hook receiving surfaces 46 are provided at four locations according to the number and positions of the hooks 57 .

The leg accommodating portion 47 accommodates the positioning leg 58 of the mounting member 50 when the mounting member 50 is mounted on the light guide 40 . The leg housings 47 are provided at three locations according to the number and positions of the positioning legs 58 .

The support portions 48 are members having an inverted L-shaped cross section and are provided at three locations. The support portion 48 is sandwiched and fixed between the circuit board 30 and the middle case 15 in order to fix the light guide 40 in the case 10 .

The mounting member 50 has a base portion 51 , elastic members 56 , hooks 57 and positioning legs 58 .

The base portion 51 is a substantially annular member that has a hole 59 for the pointer shaft 32 to pass through and that extends a certain length in the front-rear direction. The base portion 51 has a peripheral wall 52 , a pressing portion 53 and a base surface 55 .

The peripheral wall 52 is a cylindrical member extending in the front-rear direction. The peripheral wall 52 extends in an axial direction coinciding with the hole axis of the pointer shaft hole 22 . The pressing portion 53 is provided at the front end of the peripheral wall 52 (on the rear end side with respect to the mounting direction) and extends by a certain amount in a direction perpendicular to and away from the axis of the peripheral wall 52 . The pressing portion 53 presses the dial 20 from the front to the rear by sandwiching the dial 20 together with the middle case 15 . The base surface 55 is provided at the rear end of the peripheral wall 52 (front end side with respect to the mounting direction) and extends in a direction perpendicular to and approaching the axis of the peripheral wall 52 . That is, the pressing portion 53 and the base surface 55 have a surface direction perpendicular to the front-rear direction.

The inner edge of the base surface 55 forms a hole 59 surrounding the pointer shaft 32 . The base surface 55 is radially outward of the base surface 55 with respect to the position where the elastic member 56 is provided (the position of the root 56a of the elastic member 56 and the position where the elastic member 56 extends from the rear surface of the base surface 55). It has a through hole 54 . The through-holes 54 are provided according to the number of the elastic members 56 , and are provided at positions overlapping (opposing to) the elastic members 56 when viewed in the front-rear direction. Through hole 54 has a diameter smaller than the width of elastic member 56 . As a result, when viewed from the front, only the elastic member 56 is visible through the through hole 54, and the other members are shielded.

The elastic member 56 is provided on the surface (rear surface) of the base surface 55 facing the front to rear direction, and extends (extends) rearward (mounting direction). The elastic member 56 extends with an inclination with respect to the front-rear direction. Specifically, the elastic member 56 extends radially outward of the base surface 55 and toward the base portion 51 side (in a direction away from the axis of the peripheral wall 52) with an inclination such that the tip thereof widens. The elastic members 56 are provided at four locations on the base surface 55 . Since the elastic member 56 has elasticity, it bends radially inward (to approach the axis of the peripheral wall 52) when the portion overlapping the through hole 54 is pressed substantially from the front to the rear.

A hook 57 is provided at the tip of the elastic member 56 . A portion of the hook 57 protrudes in a direction away from the axis of the peripheral wall 52 and hooks onto the hook receiving surface 46 of the light guide 40 to fix the mounting member 50 to the light guide 40 .

The positioning leg 58 extends rearward from the base surface 55 substantially perpendicular to the base surface 55 . The positioning legs 58 function as positioning when attached to the light guide 40 . The positioning leg 58 positions the mounting member 50 on the light guide 40 by being housed in the leg housing portion 47 of the light guide 40 .

Next, details of attachment and detachment of the attachment member 50 to and from the light guide 40 will be described.

The mounting member 50 is mounted on the circuit board 30, the light guide 40, the inner case 15, and the dial 20, which are stacked in this order from the rear, and extends from the front to the rear as the mounting direction, so that the pointer shaft hole of the dial 20 is installed. 22 is inserted. At this time, the mounting member 50 is preferably positioned on the light guide 40 by inserting the positioning legs 58 so as to be accommodated in the leg accommodation portions 47 of the light guide 40 . The elastic member 56 is guided from the gap 49 and hooked on the hook receiving surface 46 . Thereby, the mounting member 50 is fixed to the light guide 40 . The holding portion 53 holds the dial 20 together with the hook 57 via the middle case 15 and the light guide 40 to prevent the dial 20 from floating. That is, the mounting member 50 is fixed to the dial 20 and the light guide 40 via the pressing portion 53 and the hook 57 .

The mounting member 50 is removed using a separately prepared removal tool 70 .

9A and 9B are explanatory diagrams for removing the mounting member 50 using the removal tool 70. FIG.

The removal tool 70 is a substantially cylindrical member having a shape that can be inserted into the concave portion of the base portion 51 . The removal tool 70 has four push pins 72 at four locations corresponding to the through holes 54 of the rear end surface 71 . The push pin 72 is a rod-shaped member having a diameter that allows insertion into the through hole 54 and extending rearward perpendicular to the rear end surface 71 . When the push pin 72 is inserted into the through hole 54 from the front to the rear, the push pin 72 contacts the portion of the elastic member 56 that overlaps the through hole 54 and presses the elastic member 56 substantially from the front to the rear. The dimensions of the push pin 72 are determined at least so that the hook 57 is released from the hook receiving surface 46 when the push pin 72 applies force to the elastic member 56 .

When the remover 70 is inserted into the base portion 51 of the mounting member 50, the elastic member 56 receives force from the push pin 72 and bends in a direction approaching the axis of the peripheral wall 52 starting from the root 56a. That is, the elastic member 56 bends in a direction to release the hook 57 from being caught on the hook receiving surface 46 . Since the pressing pins 72 are provided correspondingly to the through holes 54, that is, to correspond to the elastic members 56, all the elastic members 56 are bent at the same time. As a result, all the hooks 57 are released from the hook receiving surface 46 of the light guide 40 . The mounting member 50 is removed from the light guide 40 by being pulled out in the removal direction (back to front direction) opposite to the mounting direction.

It is preferable that the removing tool 70 and the mounting member 50 can be taken out from the light guide 40 integrally by appropriately setting the dimensions of the removing tool 70 . That is, when the removal tool 70 is pulled out in the removal direction, it is preferable that the attachment member 50 and the removal tool 70 are caught and the attachment member 50 is pulled out together with the removal tool 70 in the removal direction. This improves the working efficiency of removal.

Such a measuring instrument device 1 can be easily removed even when the number of hooks 57 for fixing the mounting member 50 and the light guide 40 as a member to be mounted is large, and work efficiency at the time of rework is improved. can be improved.

Moreover, since the through hole 54 is provided, there is a possibility that the light from the pointer light source 36 may leak from the through hole 54 unintentionally. In response to this, in the instrument device 1, the diameter of the through hole 54 is made smaller than the width of the elastic member 56, and the light source 36 is arranged at a position corresponding to the position of the elastic member 56 with respect to the pointer shaft 32. . Thereby, the instrument device 1 can reduce light leakage from the through-hole 54 by the elastic member 56 . Further, since the mounting member 50 is positioned on the light guide 40, it can be indirectly positioned with the pointer light source 36 via the light guide 40 positioned with respect to the pointer light source 36 (circuit board 30). As a result, the instrument device 1 can accurately arrange the mounting member 50 with respect to the pointer light source 36, and can reduce light leakage due to positioning errors.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

For example, an example has been described in which the mounting member is the mounting member 50 for pressing the dial 20 from the front to the rear, and the mounted members are the dial 20 and the light guide 40, but the instrument device is not limited to this. any member in the For example, FIG. 10 is a sectional view corresponding to FIG. 3 of the instrument device 100 as a modification. The same reference numerals are given to the configurations and parts corresponding to those of the instrument device 1 described above, and overlapping descriptions are omitted.
In the instrument device 100 , the members to be attached to the attachment member 50 are the dial 20 and the middle case 101 . The inner case 101 in this case has a hook receiving surface 102 for the hook 57 . In this case, the positioning legs 58 are housed in leg housings provided in the middle case 101 .

1, 100 Instrument device 2 Speedometer 3 Engine tachometer 10 Case 11 Outer case 12 Translucent plate 13 Openings 15, 101 Inner case 20 Dial (mounted member)
20a front surface 21 indicator 22 pointer shaft hole (hole)
30 Circuit board 30a Front surface 30b Rear surface 31 Pointer drive unit 32 Pointer shaft 33 Pointer 35 Pointer light source 36 Pointer light source (light source)
38 diffusion plate 39 positioning hole 40 light guide (mounted member)
41 Light guide part 42 Hole 43 Light receiving part 44 Light emitting part 45 Positioning protrusions 46, 102 Hook receiving surface 47 Leg accommodating part 48 Support part 49 Gap 50 Mounting member 51 Base part 52 Peripheral wall 53 Holding part 54 Through hole 55 Base surface 56 Elastic member 56a Root 57 Hook 58 Positioning leg 59 Hole 70 Remover 71 Rear end face 72 Push pin

Claims (6)

a mounted member having a hole having a hole axis that matches the mounting direction;
a mounting member fixed to the mounting member by being mounted in the mounting direction through the hole in the mounting member;
The mounting member is
a peripheral wall extending in an axial direction coinciding with the hole axis;
a pressing portion provided on the rear end side of the peripheral wall with respect to the mounting direction and extending in a direction perpendicular to and away from the axis of the peripheral wall, the pressing portion pressing the member to be mounted in the mounting direction;
a base surface provided on the distal end side of the peripheral wall with respect to the mounting direction and extending in a direction perpendicular to and approaching the axis;
an elastic member provided on a surface of the base surface facing the mounting direction and extending with an inclination with respect to the mounting direction;
a hook provided at the tip of the elastic member;
a through hole provided in the base surface at a position overlapping the elastic member when viewed in the mounting direction;
The mounting member is fixed to the mounted member via the holding portion and the hook,
The measuring instrument device, wherein the elastic member bends in a direction in which the hook is not caught on the attached member when a portion overlapping the through hole is pressed substantially in the attaching direction. The tip of the elastic member is inclined in a direction away from the shaft, and when the portion overlapping the through hole is pressed, the elastic member approaches the shaft so as to release the hook from the attached member. 2. The instrumentation of claim 1, wherein the instrumentation is flexed in a direction. a dial plate having a pointer shaft hole and an index;
a circuit board provided on the mounting direction side with respect to the dial;
a pointer driving unit provided on the circuit board and having a pointer shaft extending in a direction coinciding with the hole axis;
a light source provided around the pointer shaft on the circuit board for illuminating the dial side;
a pointer that is connected to the pointer shaft and rotates on the dial to indicate the index and is illuminated by light from the light source;
a light guide provided between the dial and the circuit board for guiding the light from the light source to the pointer;
The mounted members are the dial and the light guide,
the hole is the pointer shaft hole,
The mounting member is mounted in the mounting direction through the pointer shaft hole, so that the pressing portion presses the face of the dial plate opposite to the circuit board facing side in the mounting direction, and the hook 2. The instrument device according to claim 1, wherein said member is fixed to said light guide to fix said dial in said mounting direction. The instrument device according to claim 1, wherein said through hole has a diameter smaller than the width of said elastic member. 4. The instrument device according to claim 3, wherein said light source is arranged at a position corresponding to a position of said elastic member with respect to said pointer axis. The light guide is positioned on the circuit board,
4. The instrumentation apparatus of claim 3, wherein said mounting member is positioned on said light guide.

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