JP4630609B2 - Locking structure - Google Patents

Description

  The present invention relates to a locking structure that locks a case, a turn, and a front glass constituting a meter device, for example, and particularly prevents dust from entering the meter device from the position of the locking structure. .

  As a conventional locking structure of this type, for example, as shown in FIG. 4, there is known a structure in which a front glass 105 is locked to a turnover (upper housing) 100 constituting a meter device (similar techniques include, for example, , See Patent Document 1 and Patent Document 2.) As shown in FIG. 4, the facing 100 has an opening 100 a, and a latch receiving portion 103 having an arm through hole 102 is provided at an appropriate position on the outer peripheral wall 101 surrounding the opening 100 a. The front glass 105 is assembled so as to close the opening 100a of the facing 100. An elastic locking arm 106 having a claw portion 106a for locking at the tip is provided on the peripheral edge of the front glass 105.

  In order to lock the facing 100 and the front glass 105, first, the elastic locking arm 106 of the front glass 105 is inserted into the arm through hole 102 of the facing 100 while being elastically deformed. Then, when the claw portion 106 a of the elastic locking arm 106 passes through the arm through hole 102, the elastic locking arm 106 is bent and returned and the claw portion 106 a is locked to the locking receiving portion 103.

As a result, the facing 100 and the front glass 105 are assembled, and the opening 100 a of the facing 100 is closed with the front glass 105. Further, since the claw portion 106a of the elastic locking arm 106 protrudes below the arm through hole 102 of the locking receiving portion 103 in an exposed state, it is easily elastic when the operator presses the claw portion 106a with a finger or the like. The locking arm 106 can be unlocked.
Japanese Patent Laying-Open No. 2001-153687 (first page, FIG. 3) JP 2000-74702 A (first page, FIG. 1)

  However, in the conventional locking structure shown in FIG. 4, it is necessary that the width W of the arm through hole 102 of the locking receiving portion 103 be at least a size that allows the elastic locking arm 106 to pass through while being elastically deformed. Therefore, as shown in FIG. 4, a gap δ is generated on the side of the elastic locking arm 106 that is deformed in the arm through hole 102 in a state where the claw 106 a is locked. Then, as indicated by an arrow A in FIG. 4, the dust reaches the upper part of the latch receiving part 103 from the lower part of the latch receiving part 103 through the gap δ of the arm through hole 102, and then above the latch receiving part 103. There is a problem that the reached dust enters the opening 100a through the gap between the outer peripheral wall 101 of the facing 100 and the front glass 105.

  Here, in order to prevent intrusion of dust, it is conceivable to reduce the width W of the arm through hole 102 of the latch receiving portion 103 as much as possible. However, when the width W of the arm through hole 102 is reduced, the elastic deformation of the elastic locking arm 106 is limited. When the elastic bending deformation of the elastic locking arm 106 is restricted, the assembling property to the payback 100 is deteriorated.

  Then, the objective of this invention aims at providing the latching structure which can improve dustproof property, maintaining the assembly | attachment property to the base body of an assembly | attachment body.

According to the first aspect of the present invention, a latch receiving portion having an arm through hole is provided on one outer peripheral surface of the base body and the assembly body assembled to the base body, and the other outer peripheral surface is bent. An elastic locking arm that is deformable and has a claw portion is provided, the elastic locking arm is inserted into the arm through hole, and the elastic locking arm is bent at a position where the claw portion has passed through the arm through hole. In the locking structure in which the claw portion is locked to the locking receiving portion by return deformation, the locking receiving portion is provided with a dust-proof wall portion covering the claw portion protruding from the arm through hole, In the wall portion, the elastic engagement when releasing the engagement state of the claw portion to the engagement receiving portion on the side where the elastic engagement arm bends and deforms in the movement area of the elastic engagement arm. It provided a concave surface that forms a deflection space of the stop arm, the dust-proof wall To the claw opening exposing the claw portion protruding from the arm through holes provided, and wherein the pawl opening provided at a position facing the concave surface to form a bending space of the elastic locking arm To do.

Invention of Claim 2 is the latching structure described in Claim 1, Comprising: The said dust-proof wall part is the back surface wall part arrange | positioned at the back surface side of the said nail | claw part, and the right and left of the said nail | claw part. A pair of side wall portions disposed on the side surface side and a bottom wall portion disposed on the bottom surface side of the claw portion are provided.

The invention according to claim 3 is the locking structure according to claim 1 or 2 , wherein the base body is a turn of a meter device, and the assembly is mounted on the turn. It is characterized by being glass.

  According to the first aspect of the present invention, the dust-proof wall portion prevents dust from entering the gap of the arm through hole from the periphery of the lock receiving portion, so that the width of the arm through hole of the lock receiving portion is set narrow. Intrusion of dust can be suppressed without doing so. Therefore, according to invention of Claim 1, dustproofness can be improved, maintaining the assembly | attachment property to the base body of an assembly | attachment body. In addition, according to the first aspect of the present invention, the dust-proof wall functions as a protector that prevents inadvertent contact with the claw. Can be prevented.

Moreover, securing a sufficient elastic deflection space of the resilient locking arm at the position of the concave surface, and since in terms other than the concave can reduce the gap between the elastic locking arms, reducing the penetration probability to arms through hole of dust can do. Accordingly, the dustproofness can be further improved while maintaining the ease of assembly of the assembly to the base body.

Furthermore, the operator can easily press the nail portion by inserting a finger or the like into the nail opening. Therefore, the engagement / release operation of the claw portion can be easily performed.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the intrusion of dust from other than the front side of the latch receiving portion can be prevented, so that the dust resistance is very excellent.

According to the invention of claim 3, the same effect as that of the invention of claim 1 or claim 2 can be obtained in the locking structure in the case of assembling the front glass in turn of the meter device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show an embodiment in which the locking structure of the present invention is applied to a locking structure of a meter device. FIG. 1 is a perspective view of the main part before assembling the turning plate 2 and the front glass 1 of the meter device, and FIG. FIG. 3 is a sectional view showing a state immediately before the claw portion 4 of the elastic locking arm 3 is locked to the locking receiving portion 6 or a state in which the locking is released.

  As shown in FIG. 1, in the present embodiment, a front glass 1 that is an assembly is assembled to a turn 2 that is a base body in a state of closing an opening 2 a of the turn 2.

  As shown in FIG. 1, an elastic locking arm 3 that can be bent and deformed is provided at a predetermined position of the front glass 1. A claw portion 4 is provided at the tip of the elastic locking arm 3. The nail | claw part 4 is provided in the taper shape which narrows a width | variety gradually toward the front end side. The rear end surface 4 a of the claw portion 4 is formed as a surface perpendicular to the extending direction of the elastic locking arm 3.

  The turnback 2 has an opening 2a provided with a meter display unit (not shown). A substantially box-shaped locking receiving portion 6 is provided at a suitable position on the outer peripheral surface of the outer peripheral wall 5 forming the opening 2a. The latch receiving portion 6 is provided with an arm through hole 7 penetrating downward from above. A dust-proof wall portion 8 surrounding the claw portion 4 protruding from the arm through hole 7 when the elastic locking arm 3 is assembled is integrally provided below the locking receiving portion 6. The dust-proof wall portion 8 includes a back wall portion 8 a disposed on the back surface side of the claw portion 4, a pair of side wall portions 8 b and 8 b disposed on both side surfaces of the claw portion 4, and a bottom surface of the claw portion 4. It is comprised from the bottom wall part 8c arrange | positioned at the side.

  The back wall 8a is disposed on the side where the elastic locking arm 3 is bent and deformed. The back wall 8 a is provided with a concave surface 9 that is recessed from the other surface in the moving area of the elastic locking arm 3.

  The dustproof wall 8 is provided with a claw opening 10 through which the claw 4 protruding from the arm through hole 7 is exposed when the elastic locking arm 3 is assembled. The claw opening 10 opens in a direction B2 (shown in FIG. 3) in which the elastic locking arm 3 is bent and returned. The size of the nail opening 10 is set to a size that allows the operator's finger to be inserted.

  In such a configuration, as shown in FIG. 3, when the elastic locking arm 3 of the front glass 1 is inserted into the arm through hole 7 of the facing 2, the elastic locking arm 3 is elastically deformed and the arm of the facing 2 is penetrated. When the claw portion 4 of the elastic locking arm 3 advances through the hole 7 and passes through the arm through hole 7, the elastic locking arm 3 is bent and returned and deformed as shown in FIG. 6 is locked. Thereby, the front glass 1 is assembled | attached to the turning glass 2, and the opening part 2a of the turning glass 2 is block | closed with the front glass 1. FIG.

  As shown by an arrow “a” in FIG. 2, when dust in the vicinity of the lower part of the latch receiving part 6 moves toward the arm through hole 7 of the latch receiving part 6, the dust hits the dust-proof wall part 8. The dust hitting the dustproof wall 8 is redirected in a direction along the outer surface of the dustproof wall 8. That is, the dust-proof wall portion 8 prevents dust from entering the gaps between the arm through holes 7 from the periphery of the latch receiving portion 6. Therefore, since the intrusion of dust can be prevented without setting the width W of the arm through hole 7 of the latch receiving portion 6 to be narrow, the dustproofness can be improved while maintaining the assembling property of the front glass 1 to the turnover 2. Can do.

  The dustproof wall portion 8 covers the periphery of the claw portion 4 protruding from the arm through hole 7. That is, the dust-proof wall portion 8 also functions as a protector that prevents inadvertent contact with the claw portion 4. Accordingly, it is possible to prevent inadvertent release of the claw portion 4 that is not intended by the operator.

  Since the concave wall 9 is provided on the dust-proof wall 8 within the moving area of the elastic locking arm 3 and on the side where the elastic locking arm 3 is bent and deformed, the elastic locking arm 3 is positioned at the position of the concave surface 9. The space δ1 (FIG. 2) with the elastic locking arm can be narrowed on a surface other than the concave surface 9, and the probability of dust entering the arm through hole 7 can be reduced. it can. Therefore, it is possible to further improve the dustproofness while maintaining the assemblability of the turning 2 and the front glass 1.

  The dust-proof wall portion 8 is provided with a claw opening portion 10 that exposes the claw portion 4 protruding from the arm through hole 7 so that an operator can easily insert the finger or the like into the claw opening portion 10 Can be pressed. Therefore, the engagement / disengagement operation of the claw portion 4 can be facilitated as in the conventional example.

  The dust-proof wall portion 8 includes a back wall portion 8 a disposed on the back surface side of the claw portion 4, a pair of side wall portions 8 b and 8 b disposed on both side surfaces of the claw portion 4, and a bottom surface of the claw portion 4. Since it is comprised from the bottom wall part 8c arrange | positioned at the side, since the penetration | invasion of the dust from other than the front side of the latching receiving part 6 can be blocked | prevented, it is very excellent in dustproof property.

  In the above-described embodiment, the case where the base body is the turning back 2 of the meter device and the assembly is the front glass 1 is shown. However, when the case of the meter device and the front glass are assembled, the case body is turned back. Of course, the present invention can also be applied to the case of assembling and other than these.

  Further, in the above-described embodiment, the elastic locking arm 3 is provided on the side of the front glass 1 that is an assembly, and the locking receiving portion 6 is provided on the side of the facing 2 that is the base body. You may provide the latching | locking part 3 and the elastic latching arm 3 in the turning 2 side.

It is a principal part perspective view before the turning-back in the latching structure which concerns on embodiment of this invention, and a front glass assembly | attachment. It is sectional drawing which shows the state which the nail | claw part of the elastic latching arm in the latching structure which concerns on embodiment of this invention latched to the latching receiving part. In the latching structure concerning an embodiment of the invention, it is a sectional view showing the state where the claw part of the elastic latching arm just before latching to the latch receiving part, or the state where it was released. It is sectional drawing of the latching structure of a prior art example.

Explanation of symbols

1 Front glass (assembly)
2 Look back (base body)
2a Opening portion 3 Elastic locking arm 4 Claw portion 6 Locking receiving portion 7 Arm through hole 8 Dust-proof wall portion 8a Back wall portion 8b Side wall portion 8c Bottom wall portion 9a Concave surface 10 Claw opening portion B1 Bending of elastic locking arm Direction of deformation B2 Direction of elastic return arm bending return deformation

Claims (3)

An engagement receiving portion having an arm through hole is provided on one outer peripheral surface of the base body and the assembly body assembled to the base body, and the other outer peripheral surface is flexibly deformable and has a claw portion. The elastic locking arm is provided, the elastic locking arm is inserted into the arm through-hole, and the claw portion is deformed by deformation of the elastic locking arm at a position where the claw portion passes through the arm through-hole. In the locking structure for locking to the locking receiving part,
The latch receiving portion is provided with a dustproof wall portion covering the claw portion protruding from the arm through hole,
In the dust-proof wall, the elastic locking arm is bent and deformed in the moving area of the elastic locking arm, and the locking state of the claw portion to the locking receiving portion is released. Provide a concave surface that forms the bending space of the elastic locking arm ,
The dust-proof wall is provided with a claw opening that exposes the claw protruding from the arm through-hole, and the claw opening is provided at a location facing a concave surface that forms a bending space of the elastic locking arm. A locking structure characterized by being provided. The locking structure according to claim 1,
The dust-proof wall portion is disposed on the back surface wall portion disposed on the back surface side of the claw portion, the pair of side wall portions disposed on the side surfaces on both sides of the claw portion, and the distal end side of the claw portion. And a bottom wall portion . The locking structure according to claim 1 or 2, wherein
The locking structure according to claim 1, wherein the base body is a turn of a meter device, and the assembly is a front glass attached to the turn.

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