JPH09287979A - Fixing structure of facing for instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure of a facing for an instrument improving durability, without restriction in the design of the facing. SOLUTION: The fixing structure of facing for an instrument brings both peripheral edges 102, 111 of case 101 side and facing 110 side into contact with one another, inserts a snap pawl 10 into a case pawl support 1 to elastically engage, inserts a screw member 7 from the side of the instrument to the protrusion 2 of the support 1 and the pawl 10, engages it with the threaded hole 3 opened at the case side peripheral edge 102 of the support 1 to fix the facing 110 to the case 101, thereby avoiding the damage of the facing 110 by the clamping force of the member 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gauge head fixing structure which is fixed to a case accommodating an internal unit in an instrument mounted on a vehicle or the like.

[0002]

2. Description of the Related Art FIG. 6 shows an instrument mounted on a conventional vehicle or the like. This instrument is configured by fixing a dial 110 to a case 101 accommodating an internal machine and the like by screwing with a screw 120. In the instrument thus configured, a window (not shown) is opened in the front part of the dial 110, and when viewed in the direction of arrow A, the front part of the case 101 is seen through the window. The dial etc. (not shown) provided on the can be visually recognized.

As shown in FIGS. 7 and 8, the fixing structure of the end piece 110 at this time is such that a bracket 103 having a screw insertion hole 104 is projectingly formed on a case side peripheral edge portion 102 constituting an opening portion of the case 101. And return 110
Of the facing side peripheral edge portion 1 that abuts the case side peripheral edge portion 102.
11, a bracket 112 having a boss portion 113 in which a female screw portion 114 is engraved is formed in a protruding manner so as to correspond to the bracket 103 on the case 101 side, and the facing surfaces 102a and 102a of the case side and the facing side peripheral portions 102 and 111, and 1
11a and the brackets 103 and 112 are brought into close contact with each other, and the screw 120 inserted through the screw insertion hole 104 is screwed into the female screw portion 114 by the driver 200 (see FIG. 6) to fix the dial 110 to the case 101. Has become.

As described above, in the conventional fixing structure of the dial 110, the screw 120 is attached from the front side of the instrument (in the same direction as the arrow A).
When the driver tries to attach the driver, the driver 200 causes the front corner 110a of the dial 110 due to the design of the dial 110.
Since it is impossible to tighten the screw because it interferes with, the screw is to be tightened from the rear side.

[0005]

However, in the fixing structure of the dial 110, which is screwed from the rear surface side as described above, the threaded portion (female screw portion 114) of the screw 120 has a material 110 whose material strength is inferior to that of the case 101. Therefore, there is a possibility that cracks B may be generated in the boss portion 113 as shown in FIG. 8 at the time of screw tightening, and durability is inferior even if cracks B are not generated. Have

The dial 110 is formed of a black material in which carbon is mixed with a synthetic resin material of the base material, but it is considered that the material strength is inferior to that of the case 101 due to the mixing of carbon.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a fixed structure of a dial end for an instrument, which is free from restrictions on the design of the dial and has improved durability. There is.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is a cross-section substantially U-shaped projectingly formed on a case side peripheral edge portion constituting an opening of a case accommodating an internal unit and the like. A square tube-shaped case claw receiver formed so as to project to the side surface of the instrument by the character-shaped protrusion and the case-side peripheral edge,
A tongue-shaped snap claw that is formed on the facing side peripheral edge portion that abuts against the case side peripheral edge portion of the dial and is elastically engaged by being inserted into the case claw receiver, and the projecting portion and the snap claw from the side surface side of the instrument. It is characterized by comprising a screw member which is inserted and screwed into a screw hole 3 formed in a peripheral portion of the case claw receiver on the case side.

Therefore, according to the first aspect of the present invention, both the peripheral portions on the case side and the facing side are brought into contact with each other, the snap claws are inserted into the case claw receivers for elastic engagement, and the screw members are provided on the side surface of the instrument. The tab can be fixed to the case by inserting the protrusion of the case claw receiver and the snap claw from the side and screwing the screw into a screw hole formed in the peripheral edge of the case claw receiver on the case side.

At this time, the screw member is screwed in from the side of the instrument without any interference with the dial and the case.
There are no restrictions on the design of the dial and the case when screwing.

The screw member is inserted into the snap claw and screwed into the case side peripheral edge of the case claw receiver to prevent the snap claw from coming off from the case claw receiver. Since the engaged state is maintained, it is possible to avoid damage to the dial due to the fastening force of the screw member.

According to a second aspect of the present invention, there is provided the instrument head fixed structure according to the first aspect, wherein the snap claw has a base end side and a tip end side of the case claw receiver on a case side peripheral edge. The case-side peripheral edge portion or the projecting portion, which is elastically brought into contact with one of the facing surface and the other facing surface of the projection portion and the protruding portion, and has a claw portion formed on the tip end side, which has the facing surface with which the tip end side contacts And is connected to the case claw receiver.

Therefore, in the snap claw according to the second aspect of the invention, the base end side of the lower surface and the front end side of the upper surface of the snap claw are elastically contacted with the respective facing surfaces of the case side peripheral edge portion and the projecting portion, and the claw portion is formed. The first that is engaged with the protrusion and is connected to the case pawl receiver
The connected state and the base end side of the upper surface and the tip end side of the lower surface are elastically contacted with the facing surfaces of the protrusion and the case side peripheral edge portion respectively, and the claw portion is engaged with the case side peripheral edge portion to form the case pawl receiver. It can be connected to the case claw receiver in any one of the connecting states of the second connecting state. In any of these connection modes, the snap claws are obliquely inserted into the case claw receivers, and are elastically contacted without rattling between the facing surfaces of the case side peripheral edge portion and the protrusions.

According to a third aspect of the present invention, there is provided an instrument end cap fixing structure according to the second aspect, wherein a rib extending along an inserting direction of the snap claw is formed on one side surface of the snap claw. It is characterized in that the rib is elastically brought into contact with a peripheral surface of the case side or an opposing surface of the projection and is connected to the case pawl receiver.

Therefore, in the third aspect of the invention, the rib is formed on the lower surface or the upper surface of the snap claw. Unlike the thick portion formed on the entire one side surface of the snap claw, the rib does not impair the elasticity of the snap claw and does not hinder the snap action of the snap claw. The snap claw is inserted into the case claw receiver by elastically contacting the ribs formed on the lower surface with the peripheral edge of the case side, or by making the ribs formed on the upper surface elastically contact the protrusions and then inserted by the ribs on the case side. It can be held in a tight fit condition between the opposing surfaces of the peripheral portion and the protrusion, and the engagement of the claw portion with the case claw receiver can be stably maintained.

Further, the invention according to claim 4 is the fixing structure for the instrument end piece according to claim 2 or 3, wherein the base end side of the snap claw is elastically contacted with the peripheral surface of the case side or the opposing surface of the projection. A taper surface serving as a receiving surface is formed in the inserting direction of the snap claw, and the snap claw is connected to the case claw receiver by elastically contacting the base end side of the snap claw with the taper surface. There is.

Therefore, in the invention according to claim 4, the snap claw is guided by the tapered surface to be inserted into the case claw receiver, and the claw portion is properly engaged. The bending in the engaging direction is restricted by the tapered surface, and the engagement of the claw portion can be stably maintained.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a vehicular measuring instrument adopting a facing fixing structure as an embodiment of the present invention. This instrument is configured by fixing a dial 110 to an opening of a case 101 accommodating an internal unit and the like, and a window portion (not shown) opened in a front portion of the dial 110 is viewed in a direction of an arrow A. By doing so, a dial plate or the like (not shown) provided on the front portion of the case 101 can be seen through the window.

As shown in FIGS. 2 (a), 2 (b) and 3, the end face fixing structure as one embodiment adopted in this instrument has a case-side peripheral edge portion forming the opening 105 of the case 101. A square tubular case nail receiver 1 formed on 102
A tongue-shaped snap claw 10 elastically engaged with the case claw receiver 1 formed on the case-side peripheral part 111 of the dial 110 that abuts the case side peripheral part 102, and the case claw receiver 1 and the snap claw 10 are inserted. The screw member 7 is screwed to the case-side peripheral edge portion 102 and is generally configured.

The case claw receiver 1 has a case-side peripheral edge portion 102.
The projecting portion 2 having a substantially U-shaped cross section that is formed to project and the case-side peripheral edge portion 102 are formed into a rectangular tube shape. The protrusion 2 includes a flat portion 2a and side walls 2b provided on both sides of the flat portion 2a. The side wall 2b extends from the case-side peripheral edge portion 102 so as to project to the side surface of the instrument. It is formed integrally with the side peripheral edge portion 102.

The case claw receiver 1 is a case-side peripheral portion 1
02, a screw hole 3 is formed in a U-shaped recess 4, and a flat portion 2a of the protrusion 2 facing the case-side peripheral edge portion 102 has a U-shaped screw insertion portion 5 facing the screw hole 3. It is formed by notching in a shape.

This case claw receiver 1 is preferably a snap claw 1 on the case side peripheral portion 102 of the case claw receiver 1.
A tapered surface 6 is formed which is a receiving surface in the insertion direction of 0. The tapered surface 6 is formed on the inlet side portion of the snap claw 10 of the case claw receiver 1 while avoiding the drilled portion of the screw hole 3.

Further, the snap claw 10 is integrally formed at a portion corresponding to the case claw receiver 1 on the facing side peripheral portion 111 so as to project like a tongue piece toward the case claw receiver 1 side. The snap claw 10 is formed with a claw portion 12 projecting to the upper surface side at the tip end thereof, and a substantially U-shaped screw insertion hole 11 is bored in the plane portion thereof.

The snap claw 10 is preferably provided on the lower surface side thereof with the snap claws 1 on both sides of the screw insertion hole 11.
The rib 13 is formed along the insertion direction of 0 (see FIG. 2).
(B)). Unlike the thick portion formed on the entire lower surface of the snap claw 10, the rib 13 does not impair the elasticity of the snap claw 10 and does not hinder the snap action of the snap claw 10.

Further, the screw member 7 is inserted through the head portion 7a which engages with the flat portion 2a of the protrusion 2 via the washer 8, the screw insertion portion 5 and the screw insertion hole 11, and the tip portion is made into the screw hole 3. It is formed having a shaft portion 7b to be screwed.

The screw insertion portion 5 and the screw insertion hole 11 are formed in the above-mentioned U-shape in consideration of die cutting at the time of molding.

To fix the dial 110 having the snap claw 10 to the case 101 having the case claw receiver 1 as described above, the following procedure is performed.

First, the dial 110 is arranged on the side of the opening 105 of the case 101 so as to oppose the peripheral edges 111 and 102 of the dial and the case, and the snap claw 10 and the case claw receiver 1, respectively. Then, the dial 110 and the case 101 are pressed so as to approach each other. By this pressing, the snap claw 10 is guided by the tapered surface 6 on the inlet side of the case claw receiver 1 and inserted into the case claw receiver 1, and the facing surfaces 111a and 102a of the facing side and the case side peripheral edge portions 111 and 102 contact each other. At the same time, the claw portion 12 of the snap claw 10 projects toward the outlet side of the case claw receiver 1 and elastically engages with the flat portion 2a of the protrusion 2.

Thereafter, the screw member 7 is inserted from the side surface direction of the instrument (the direction of arrow C in FIG. 1), the shaft portion 7b thereof is inserted into the screw insertion portion 5 of the projection 2 and the screw insertion hole 11 of the snap claw 10. Moreover, the head portion 7a is locked to the flat portion 2a of the protrusion 2 via the washer 8, and the tip of the shaft portion 7b is screwed into the screw hole 3
Install by screwing on. This allows the dial 110 to be fixed to the case 102.

When it is necessary to release the fixing structure described above and separate the facing 110 from the case 101 at the time of maintenance, the following is performed.

First, the screw member 7 is unscrewed to remove the screw member 7. Next, the claw portion 12 projecting to the outlet side of the case claw receiver 1 is pushed in the anti-engaging direction (downward in FIG. 3) against the elastic force of the snap claw 10 so that the claw portion 12 and the projection 2 are separated. The tab 110 can be separated from the case 101 by releasing the engagement with the flat portion 2a and pulling out the snap claw 10 from the case claw receiver 1.

According to the fixing structure of this embodiment, since the screw member 7 is screwed in from the side of the instrument without any interference with the dial 110 and the case 102, the design of the dial 110 and the case 102 is restricted. Without
It can be easily assembled. This, in turn, is the return 11
0 and the design freedom of the case 102 are expanded.

At this time, the screw member 7 is inserted through the snap claw 10 to prevent the snap claw 10 from coming off the case claw receiver 1, and the snap claw 10 and the case claw receiver 1
Since it maintains the engagement state with, the damage of the dial 110 due to the fastening force of the screw member 7 can be avoided, and the fixing structure has improved durability.

Moreover, in this embodiment, the engagement of the snap claw 10 with the case claw receiver 1 is obtained with the rib 13 on the lower surface side of the snap claw 10 abutting on the tapered surface 6, so that the snap claw 10 The taper surface 6 restricts the bending of the case 10 in the anti-engagement direction, and the rib 13 forms the case-side peripheral edge portion 102.
The snap claw 10 can be held in a tight fit state between the opposing surfaces of the projection 2 and the projection 2, and the engagement of the claw 12 can be maintained stable against external factors such as vibration. A fixed structure can be obtained.

Further, the snap claw 10 has its claw portion 12 projecting the case claw receiver 1 toward the outlet side so that the flat portion 2a of the projection 2 is formed.
Since the engagement state can be easily confirmed from the outside, it is easy to find the engagement failure, and the engagement failure can be corrected during the assembling process to be always suitable. It is possible to secure a correct engagement state.

FIG. 4 shows a fixing structure as another embodiment of the present invention.

In this fixing structure, a taper surface 6 is provided on the lower surface of the flat portion 2a of the projection 2 constituting the case pawl receiver 1 (a surface facing the case side peripheral edge portion 102). The rib 13 is provided on the upper surface side of the snap claw 10 and the claw portion 12 is provided so as to project to the lower surface side.
The other structure is the same as that of the one embodiment described above, except that the claw portion 12 of the snap claw 10 is engaged with the edge portion 102b of the case side peripheral portion 10 of the case claw receiver 1.

The fixing structure of this embodiment also has the same operation and effect as in the one embodiment.

FIG. 5 shows a modification of the above-described embodiment. An example of this change is the screw insertion part 5, and the screw insertion hole 1.
The other structure is the same as that of the above-described embodiment, except that both 1 are configured by round holes.

This modification also has the same effects as the above-described embodiment.

Furthermore, as an embodiment of the present invention,
Both the taper surface 6 and the rib 13 described above, or a fixing structure not provided with either one are included, and in this embodiment as well, there is no restriction on the design of the dial 110, and durability is maintained. It is possible to provide an improved fixation structure for the end piece for an instrument.

[0043]

According to the present invention, as described in detail above, the following effects can be obtained.

That is, according to the first aspect of the invention, the screw member is screwed in from the side direction of the instrument in which there is no interference between the dial and the case, so that the degree of freedom in designing the dial and the case can be increased. In addition, the snap claws are inserted and screwed into the screw holes on the peripheral edge of the case to prevent the snap claws from coming off the case claw receivers. Since the end piece is fixed to the case while maintaining the fitting state, damage to the end piece due to the fastening force of the screw member can be avoided, and therefore, there is no restriction on the end piece design, and for instruments with improved durability It is possible to provide a fixed structure of the end piece.

According to the second aspect of the present invention, the snap claws are obliquely inserted into the case claw receivers, and there is no rattling between the facing surfaces of the case side peripheral portion and the protrusions. Since they are in contact with each other, the engagement of the claw portion can be stably maintained.

According to the third aspect of the present invention, the snap claws inserted into the case claw receivers are held by the ribs in a slightly fitted state between the peripheral edges of the case and the facing surfaces of the protrusions. The engagement of the snap claw with the case claw receiver can be stably maintained.

Further, according to the invention described in claim 4, since the snap claw is guided by the tapered surface to be inserted into the case claw receiver and the claw portion can be properly engaged, the assembly is easy. Further, after the insertion, the bending of the snap claw in the anti-engaging direction is restricted by the taper surface, and the engagement of the claw portion can be stably maintained.

[Brief description of drawings]

FIG. 1 is a side view of an instrument that employs a facing fixing structure of the present invention.

FIG. 2A is an exploded perspective view of a facing fixing structure as one embodiment of the present invention, and FIG. 2B is a perspective view of a part of a snap claw viewed from the lower surface side.

FIG. 3 is a vertical cross-sectional side view of an assembled state of the facing fixing structure of FIG.

FIG. 4 is a vertical cross-sectional side view of an assembled state of a facing fixing structure as another embodiment of the present invention.

FIG. 5 is an exploded perspective view of a modified example of the facing fixing structure of FIG. 2.

FIG. 6 is a side view of an instrument to which a conventional facing-end fixing structure is applied.

FIG. 7 is an exploded perspective view of the end fixing structure of FIG.

FIG. 8 is a cross-sectional view illustrating the operation of the endless fixing structure of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case claw receiver 2 Projection part 3 Screw hole 6 Tapered surface 7 Screw member 10 Snap claw 12 Claw part 13 Rib 101 Case 102 Case side peripheral part 110 Look back 111 Look back side peripheral part

Claims (4)

[Claims] 1. A projecting portion having a substantially U-shaped cross section, which is formed at a peripheral edge portion of a case, which constitutes an opening of a case accommodating an internal unit, and the peripheral edge portion of the case, so as to project to a side surface of the instrument. A formed rectangular tube-shaped case claw receiver, and a tongue-shaped snap claw that is formed on the dial-side peripheral edge portion that abuts the case-side peripheral edge portion of the dial and that is elastically engaged by being inserted into the case nail receiver, An instrument end piece characterized by comprising a screw member that is inserted through the protrusion and the snap claw from the side surface side of the instrument and screwed into a screw hole formed in the case side peripheral portion of the case claw receiver. Fixed structure. 2. The instrument backpack fixing structure according to claim 1, wherein the snap claw has one of a base end side and a tip end side of a case side peripheral portion of the case claw receiver and a protrusion. Of the case claw by elastically contacting the facing surface and the other facing surface of the case, and engaging the claw portion formed on the tip end side with the case side peripheral edge portion or the protrusion having the facing surface with which the tip end side abuts. Fixing structure for the end piece for instruments, which is connected to a receiver. 3. The instrument dial fixing structure according to claim 2, wherein a rib is formed on one side surface of the snap claw along an inserting direction of the snap claw, and the snap claw connects the rib to the case side peripheral edge. An end piece fixing structure for an instrument, which is elastically brought into contact with the facing surface of the projection or the projection and is connected to the case pawl receiver. 4. The instrument end cap fixing structure according to claim 2, wherein the snap claw insertion direction is provided on the facing surface of the case-side peripheral edge portion or the protrusion where the base end side of the snap claw elastically contacts. A fixing structure for the instrument end piece, wherein a taper surface serving as a receiving surface is formed, and the snap claw is connected to the case claw receiver by elastically contacting the base end side of the snap claw with the taper surface. .