JPH08255986A - Fixing structure of flat member - Google Patents

Abstract

PURPOSE: To provide the fixing structure of a flat member, which enhances the operability of a final fixing operation. CONSTITUTION: In the fixing structure of a flat member 100, coupling claws 1 erected and installed on a fixing plate 101 are coupled to coupling recessed parts 104 formed at both ends of the flat member 100, and the flat member 100 is fixed temporarily onto the fixing plate 101 in the width direction and in the up-and-down direction. In the fixing structure, the coupling claws 1 are formed of elastic supports 2 erected and installed on the fixation plate 101 and elastic coupling pieces 3 which are installed to extend obliquely to lower parts from upper ends of the coupling supports 2 with its tip ends coupled to the coupling recessed parts 104.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat plate-shaped member, such as a rigid printed circuit board (hereinafter referred to as an HPC substrate), which is temporarily fixed in advance when it is fixed on a fixed plate such as an instrument case. Regarding the fixed structure of.

[0002]

2. Description of the Related Art Generally, a flat plate-shaped member such as an HPC board on which predetermined electric and electronic parts are mounted is fixed in a predetermined instrument case, and wiring (for example, FPC) on the outer side of the case is fixed.
The HPC board and the HPC board are connected to each other by a screw penetrating the case.

4 to 6 show a fixing structure of such a conventional general flat plate member.
An HPC board 100 on which electronic components are mounted is provided, and engaging recesses 104 are cut out at both edges of the HPC board 100.

Further, on the lower side of the HPC board 100,
The HPC is projected substantially at a right angle to the HPC board 100.
A plurality of terminals 102 connected to a predetermined electric circuit of the substrate 100 are fixed, and screw holes 103 are formed in each of the terminals 102.

On the other hand, the case 101 as a fixing plate to which the HPC board 100 is fixed is classified into a side engaging type shown in FIG. 4 and an end engaging type shown in FIG.

A side engaging type case 101 shown in FIG.
On the inner surface of the, a gap 108 corresponding to the thickness of the HPC substrate 100 is formed.
A pair of ribs 107 provided upright to form the HPC substrate 100.
A plurality of pairs are formed at appropriate intervals corresponding to the longitudinal direction, and a pair of locking claws 106 are formed corresponding to the width dimension position of the HPC substrate 100 in the longitudinal direction. The locking claws 106 are formed so as to be opposed to both end side surfaces of the HPC board 100, and a hook-shaped head portion 106 a that engages with the engagement recess 104 is formed at the upper end. Case 1
On the inner surface of 01, the terminal 102 of the HPC board 100
A plurality of screw fastenings 105 are provided corresponding to the screw holes 103.

Further, as shown in FIG. 5, a pair of ribs 107 and screwing holes 105 are provided on the inner surface of the end face engaging type case 101 in the same manner as the side engaging type, and A pair of locking claws 109 are formed in correspondence with the widthwise position of the HPC board 100 in the longitudinal direction. The locking claws 109 are formed so as to project toward the end faces of both ends of the HPC board 100, and hook-shaped heads 109a that engage with the engaging recesses 104 are formed at the upper ends.

The HPC board 100 is fixed to each of these types of cases 101 as follows.

That is, the terminal 102 is located on the lower side, and the lower edge of the HPC substrate 100 is provided with a pair of ribs 107.
The HPC board 10 is pushed into the gap 108 of the
0 of the engaging recess 104 to the locking claws 106, 109 of each type
By engaging with the hook-shaped heads 106a and 109a of the HPC substrate 100, the HPC board 100 is fixed to the pair of ribs 107 and the locking claw 10.
It is sandwiched by 6 or 109 and is held in the width direction and the vertical direction by the engagement of the locking claw 106 or 109 and the engaging recess 104, and is temporarily fixed to each type of case 101. At this time, the side engaging type case 101 (FIG. 4)
, The hook-shaped head portion 106a of the locking claw 106 is the HPC.
The engagement concave portion 104 is engaged from the side surface side of the board 100, and in the case 101 (FIG. 5) of the other end surface engagement type, the hook-shaped head 109a of the locking claw 109 is from the end surface side of the HPC board 100. It is adapted to engage with the engaging recess 104.

The HPC board 100 temporarily fixed to each type of case 101 in this way is inserted into the screwing hole 105 from the bottom side of the case 101 and is screwed into the screw hole 103 of the terminal 102. (See FIG. 6), it is permanently fixed and predetermined wiring is performed.

[0011]

However, in the fixing structure of the plate-like member at the time of the above-mentioned temporary fixing, the structure shown in FIG.
The locking claw 106 is integrally formed with the case 101 by the synthetic resin material of the case 101 as shown in FIG.
Along with the movement of the HPC substrate 100 in the temporary fixing of 00, the elasticity of the resin is used to bend the locking claw 106 to the side opposite to the engaging direction (arrow a side), and then returns. Although the hook-shaped head portion 106a of the retaining pawl 106 is engaged with the engaging concave portion 104 to temporarily fix the retaining pawl 106, the locking pawl 106 cannot return to its original position only by the elasticity of the resin (see FIG. 6)), or the locking claw 106 may be broken. When such a situation occurs, the hook-shaped head portion 106a of the locking claw 106 is engaged with the engaging recess 104.
Therefore, the HPC board 100 separates from the case 101 (in the direction of arrow b) at the time of the main fixing shown in FIG. 6, and the work cannot be performed, resulting in a decrease in the workability of the main fixing. Cause

Such a problem similarly occurs in the end surface engaging type locking claw 109 shown in FIG. In FIG. 6, reference numeral 110 is a flexible printed circuit board provided on the bottom side of the case 101.

Further, in the conventional fixing structure of the flat plate-shaped member, since the locking claws 106 (109) are engaged with the engaging recesses 104 with a clearance required for the engagement, after the temporary fixing. The HPC board 100 is wobbled in the direction C shown in FIG. 4, and as a result, the screw hole 103 of the terminal 102 and the screwing hole 105 formed in the case 101 are inaccurately aligned and the main fixing is performed. There is also a problem that the workability is deteriorated.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a fixing structure for a flat plate-shaped member which has improved workability in the main fixing.

[0015]

In order to achieve the above-mentioned object, the invention according to claim 1 is such that an engaging claw erected on a fixed plate is formed at both ends of a flat plate-like member. In the fixing structure of the flat plate member for engaging the concave portion and temporarily fixing the flat plate member on the fixing plate in the width direction and the vertical direction, the locking claw is erected on the fixing plate. It is characterized in that it is formed of an elastic strut and an elastic engagement piece extending obliquely downward from the upper end of the elastic strut and having a tip end thereof engaged with the engagement recess.

The invention according to claim 2 is the fixing structure for a flat plate member according to claim 1, wherein the elastic engaging piece has an outer shape of an engaging edge portion of the engaging concave portion at a tip thereof. It is characterized in that it is provided with an engagement portion formed in a shape corresponding to.

Further, the invention according to claim 3 is the same as claim 1.
Alternatively, the flat member fixing structure according to the second aspect is characterized in that the elastic engagement piece and an upper surface thereof are formed into an inclined flat surface for guiding the flat member.

[0018]

The invention according to claims 1 to 3 has the above-mentioned structure and therefore has the following effect.

That is, according to the first aspect of the present invention, since the locking claw is formed of the elastic column and the elastic engaging piece, the amount of bending of the locking claw which is bent by the movement of the flat plate member is determined by the elastic column and the elastic column. It can be shared by the joint pieces to reduce the amount of bending of the support column and the engaging pieces themselves, and the elastic claws return to their original positions with sufficient elasticity to engage the elastic engaging pieces. The flat plate-shaped member can be temporarily fixed on the fixing plate by securely engaging with the recess.

Further, since the locking claw can reduce the amount of bending of the elastic column and the elastic engaging piece itself, the breakage resistance is improved by that amount, and the breakage is prevented and the flat plate is prevented. The member can be securely temporarily fixed.

Further, since the locking claw is formed by elastically forming both the support pillar and the engaging piece, the bending quantity of the locking claw which is bent by the movement of the flat plate-shaped member is sufficient by the supporting pillar and the engaging piece. Since it can be absorbed, the protrusion height can be reduced accordingly, and the breakage strength can be further improved.

Further, since the elastic engaging piece of the locking claw engages with the engaging concave portion in the elastic contact state, the flat plate-like member can be temporarily fixed without rattling.

Further, according to a second aspect of the present invention, an engaging portion formed in a shape corresponding to the outer shape of the engaging edge portion of the engaging recess is provided at the tip of the elastic engaging piece of the locking claw. Therefore, at the time of temporary fixing, the engaging portion elastically contacts the engaging edge portion, and the flat plate member can be temporarily fixed in a more stable state.

Further, according to the third aspect of the present invention, since the upper surface of the elastic engagement piece is formed as an inclined flat surface that guides the flat plate-shaped member, a wide insertion guide for the flat plate-shaped member can be secured, and the flat plate can be secured. It is possible to accurately and easily guide the strip-shaped member to the temporarily fixed portion.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the illustrated embodiments.

1 to 3 show a fixing structure of a flat plate-shaped member as one embodiment. This fixing structure is the same as the above-mentioned conventional end face engaging type fixing structure (see FIG. 5) except that the locking claw 1 is different. For this reason, the same components are assigned the same reference numerals as those of the conventional fixed structure, and redundant description will be omitted.

That is, in the fixing structure shown in FIGS. 1 and 2, the engaging claws 1, which are erected on the case 101 as a fixing plate, are formed at both end edges of the HPC substrate 100 as a flat plate member. The HPC board 1 is engaged with the mating recess 104.
00 is temporarily fixed on the case 101 in the width direction and the vertical direction.

At this time, as in the conventional structure, the HPC board 100 is formed with engagement recesses 104 at both edges thereof, and is connected to a predetermined electric circuit of the HPC board 100 at the lower side thereof. A plurality of terminals 102 are fixed and screw holes 103 are formed in each terminal 102. As shown in FIG. 3 (a), the engagement recess 104 has a chamfered slope portion 104 a at the upper part of the opening at the lower part of both side end surfaces 100 a of the HPC board 100, and an upper surface facing the upper and lower surfaces substantially in parallel. 104b, lower surface 104c
Is formed by cutting out in a substantially U-shape.

Further, the case 101 has a gap 1 corresponding to the wall thickness of the HPC substrate 100 on the inner surface thereof, as in the conventional structure.
A plurality of ribs 107 each having 08 are provided opposite to each other, and a plurality of screw holes 105 are provided corresponding to the screw holes 103 of the terminal 102 of the HPC board 100.

Also, the locking claw 1 is located at a position corresponding to the width dimension position in the longitudinal direction of the HPC board 100, as in the case of the end surface engagement type described above, on both side end surfaces 100 of the HPC board 100.
The protrusion is formed so as to face a.

Unlike the conventional structure, the locking claw 1 is provided with an elastic column 2 standing upright on the case 101, extending obliquely downward from the upper end of the elastic column 2, and engaging the tip thereof. The elastic support pieces 2 and the elastic engagement pieces 3 that engage with the recesses 104 are formed.
It is made of a synthetic resin material forming No. 1 and is integrally formed with the case 101.

At this time, the root portion 2a of the elastic strut 2 with respect to the case 101 and the root portion 3c of the elastic engagement piece 3 with respect to the elastic strut 2 improve the strength of the elastic strut 2 and the elastic engagement piece 3 against each bending. Therefore, the elastic engagement piece 3 is formed to have a length such that the tip of the elastic engagement piece 3 abuts the lower surface 104c and engages with the engagement recess 104 when the HPC board 100 is temporarily fixed. ing.

The tip of the elastic engaging piece 3 may be formed as a mere flat surface which abuts the lower surface 104c of the engaging concave portion 104, but it is preferably located below the tip of the elastic engaging piece 3 as in this embodiment. The protrusion 4 is formed as a substantially L-shaped engagement portion 3a corresponding to the outer shape of the engagement edge portion 104d of the engagement recess 104.

Further, the elastic engagement piece 3 is not limited in its cross-sectional shape as long as an appropriate bending can be obtained, but its upper surface preferably guides the HPC substrate 100 as in this embodiment. It is formed in a cross-sectional shape so as to form the inclined flat surface 3b.

HP is attached to the case 101 formed in this way.
The C substrate 100 is temporarily fixed as follows.

That is, in the HPC board 100, as shown in FIG. 2, the inclined surface portions 111 formed at the corners at the lower ends of the HPC substrate 100 are brought into contact with the inclined flat surfaces 3b of the pair of locking claws 1, respectively. The positioning is roughly performed, and then the lower side edge portion of the HPC substrate 100 is moved downward to be inserted into the gap 108 of the rib 107.
The engagement recess 104 of the HPC board 100 is temporarily fixed to the case 101 by engaging the elastic engagement piece 3 of the locking claw 1.

In this temporary fixing process, the pair of locking claws 1
Is moved by the movement of the HPC board 100 as shown in FIG.
However, the elastic strut 2 and the elastic engaging piece 3 are also flexed during this sag, and the elastic strut 2 and the elastic engaging piece 3 share the amount of flexure of the locking claw 1, so that the strut 2 and the engaging piece 3 The amount of bending of 3 itself can be reduced, and the locking claw 1 can return to its original position with sufficient elasticity. Therefore, when the engagement concave portion 104 reaches the tip position of the elastic engagement piece 3 by the movement of the HPC board 100, the engagement claw 1 returns to the original position and is provided at the tip of the elastic engagement piece 3. Engagement part 3a
Engages with the engaging edge portion 104d of the engaging recess 104 to form the HPC.
The board 100 can be reliably temporarily fixed to the case 101.

In this way, the locking claw 1 has its elastic support 2
Also, since the amount of bending of the elastic engagement piece 3 itself can be reduced, the breakage resistance is improved accordingly, and the HPC board 100 can be reliably temporarily fixed while preventing breakage.

Further, since the locking claw 1 is formed by elastically forming the column 2 and the engaging piece 3, the HPC board 100
Since the amount of bending of the locking claw 1 that bends due to the movement of can be sufficiently absorbed by the support column 2 and the engaging piece 3, the protrusion height H is correspondingly increased.
(See FIG. 3A) can be lowered to further improve the breakage resistance.

Further, in this embodiment, since the upper surface of the elastic engaging piece 3 is formed as the inclined flat surface 3b for guiding the HPC board 100, a wide insertion guide for the HPC board 100 can be secured, It is possible to accurately and easily guide the HPC substrate 100 to the temporarily fixed portion.

The HPC substrate 100 thus obtained
3A, the engaging portion 3a provided at the tip of the elastic engaging piece 3 has the engaging edge portion 1 of the engaging concave portion 104 as shown in FIG.
04d is elastically engaged with the screw hole 103 of the terminal 102 and the screw fixing hole 105 provided in the case 101.
The HPC substrate 100 can be temporarily fixed in a state in which they are exactly matched with each other in the longitudinal direction (direction of arrow c in FIG. 1) and in the up-down direction (direction of arrow d in FIG. 1) without rattling.

Therefore, in the fixing structure of the present embodiment, a screw (not shown) is then inserted into the screwing hole 105 of the case 101 from the bottom surface side of the case 101 to make the screw hole 1 of the terminal 102.
It is possible to easily perform main fixing by screwing into 03, and workability at the time of main fixing is improved.

Moreover, in the fixing structure of this embodiment, the elastic engaging piece 3 has the inclined flat surface 3 as shown in FIG. 3 (a).
It is in an engaged state in which b is elastically contacted with the inclined surface portion 104a of the engagement concave portion 104, and a more stable fixing structure is provided.
In this way, the slope portion 1 formed in the opening of the engaging recess 104
04a is originally designed as a relief portion when the elastic engagement piece 3 engages with the engagement concave portion 104, but has a function as a receiving portion of the elastic engagement portion 3 as in the present embodiment. By doing so, a more stable fixing structure can be obtained.

In the above-mentioned embodiment, the end face engaging type fixing structure has been described, but the present invention is not limited to this, and the locking claws 1 face the side surfaces of both ends of the HPC board 100. Even if the side engaging type fixing structure is installed upright as described above, the same operation efficiency as described above can be obtained.

[0045]

As described in detail above, according to the present invention, the following effects can be obtained.

That is, according to the first aspect of the present invention, since the locking claw is formed by the elastic column and the elastic engaging piece,
The amount of bending of the locking claw that bends due to the movement of the flat plate member is shared by the elastic column and the elastic engaging piece, and the amount of bending of the column and the engaging piece itself can be reduced. The locking claw is returned to its original position to securely engage the elastic engagement piece with the engagement recess to temporarily fix the flat plate member. Since the amount of flexure of the piece itself can be reduced, the breakage resistance is improved accordingly, and it is possible to prevent breakage and securely temporarily fix the flat plate-shaped member. Since both the support pillar and the engaging piece are formed to have elasticity, the amount of bending of the locking claw that is bent by the movement of the flat plate-shaped member can be sufficiently absorbed by the support pillar and the engaging piece. The protrusion height can be reduced to further improve the breakage resistance, and the locking claw Since the elastic engagement piece engages with the engagement recess in the elastic contact state, the flat plate member can be temporarily fixed in a state without rattling. It is possible to provide a fixing structure for the member.

According to the second aspect of the invention, an engaging portion formed in a shape corresponding to the outer shape of the engaging edge portion of the engaging recess is formed at the tip of the elastic engaging piece of the locking claw. Since it is provided, at the time of temporary fixing, the engaging portion can elastically contact the edge of the engaging concave portion to temporarily fix the flat plate member in a more stable state. As a result, in addition to the effect of the invention of claim 1. It is possible to provide a fixing structure for a flat plate-shaped member, which has further improved workability in the main fixing.

Further, according to the third aspect of the present invention, since the upper surface of the elastic engagement piece is formed as the inclined flat surface that guides the flat plate-shaped member, it is possible to secure a wide insertion guide for the flat plate-shaped member. The flat plate member can be accurately and easily guided to the temporarily fixed portion, and as a result, in addition to the effect of the invention according to claim 1 or 2, the flat plate member has further improved workability in the main fixing. A fixing structure for the member can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a fixing structure of a flat plate-shaped member as one embodiment.

FIG. 2 is an exploded perspective view of the fixing structure for the flat plate member of FIG.

3A and 3B are cross-sectional views of a locking claw used for the fixing structure of the flat plate-shaped member of FIG. 1, where FIG. 3A shows an engaged state and FIG. 3B shows a state of an engaging process.

FIG. 4 is an exploded perspective view of a conventional side engaging type flat member fixing structure.

FIG. 5 is a partial perspective view of a case used for a conventional fixing structure of an end-face engaging type flat plate member.

FIG. 6 is a partially cutaway side view illustrating main fixing of the fixing structure for the flat plate member of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Locking claw 2 Elastic support 3 Elastic engaging piece 3a Engaging part 3b Inclined flat surface 100 HPC board (flat plate member) 101 Case (fixing plate) 104 Engagement recess 104d Engagement edge (of engagement recess)

Claims (3)

[Claims] 1. A locking claw provided upright on a fixed plate is engaged with engagement recesses formed at both ends of the flat plate member so that the flat plate member is placed on the fixed plate in the width direction. And a fixing structure of a flat plate-like member that is temporarily fixed in the up-down direction, wherein the locking claws are elastic columns that are erected on the fixing plate,
A structure for fixing a flat plate-shaped member, characterized in that it extends obliquely downward from the upper end of the elastic column, and the tip of the elastic column is formed of an elastic engaging piece that engages with the engaging recess. 2. The fixing structure for a flat plate member according to claim 1, wherein the elastic engagement piece is formed at a tip thereof in a shape corresponding to an outer shape of an engagement edge portion of the engagement recess. A fixing structure for a flat plate-shaped member, comprising an engaging portion. 3. The fixing structure for a flat plate member according to claim 1, wherein the elastic engagement piece has an upper surface formed into an inclined flat surface for guiding the flat plate member. Fixing structure of flat plate member.