JP4726853B2 - Resin member assembly structure using hook engagement - Google Patents

Description

  The present invention relates to an assembly structure of a resin member in which a plurality of resin covers or resin plates are assembled by hook engagement in an electronic device storage device represented by a facsimile, a printer, a copying machine, an image reading device, and the like.

  Conventionally, in the assembly of resin covers, as shown in Japanese Patent No. 3334350 (Patent Document 1), a structure in which resin covers are combined with a screw member has been proposed. It is undeniable that becomes complicated.

For this reason, in addition to tightening with screws, or instead of tightening with screws, hook-shaped fitting using elastic deformation of resin has been often used recently for the purpose of cost reduction or the like.
However, when packing and transporting products containing parts fastened by hook-shaped fitting using the elastic deformation of resin members, the hook part may come off due to drop impact or vibration during packing or transportation. May occur.

Japanese Patent Laid-Open No. 2002-370787 (Patent Document 2) exists as a technique that can be easily and reliably packed due to the detachment of the hook portion or the like during packing. This technology is a technology for packing from the top of a product, and includes a cover body having flexibility and a pair of connecting rods for connecting both end portions of the cover body so as to keep each of them in an extended state. Locking means for locking the pair of connecting rods is provided so as to hold the cover body in an extended state so as to cover and hold the product as the packaged material.
However, such a technique does not prevent the hook of the product itself from slipping off, but packs a product that is easily detached with a hook or the like, and is a technique unrelated to the present invention.

In addition, referring to FIG. 7, the hook portion 41 provided with two resin members (first resin member 4 and second resin member 5) on the first resin member 4 side and the second resin member 5. When the recess 51 provided on the side is configured to be detachable by engaging / disengaging, the tool 6 such as a minus driver is inserted from the tool insertion hole 52 opened to the outside of the product, If the engagement can be released by pressing the hook portion 41 fitted in the recess 51, the resin members can be easily attached and detached. In this case, as shown in FIG. In addition, the tool 6 may enter the inside of the device beyond the engagement position of the hook portion 41 and damage the board or the like inside the device, or the hook portion 41 may be damaged by the tool 6 as shown in FIG. That the hook part is squeezed too much Jill.
Patent No. 3334350 JP 2002-370787 A

In order to solve such a problem, the present invention is elastic as shown in FIG. 5 in which the coupling between the first resin member 4 and the second resin member 5 protrudes from the first resin member 4 in the pressing direction. The hook portion 41 is deformed in a direction different from the pressing direction by deformation, and a concave portion 51 formed on the second resin member 5 side and provided at the pressing storage position of the hook portion 41. In the assembly structure of the resin member in which the first resin member 4 and the second resin member 5 are coupled and held at a predetermined position by engaging with the recess 51,
The recessed portion 51 is formed by an insertion portion extending in the pressing direction and a protruding portion protruding from the insertion portion in a direction in which the hook portion 41 is elastically deformed,
A tool insertion hole 52 for inserting a tool to disengage the engagement between the hook portion 41 and the recess 51 opens from the surface of the second resin member 5 to face the protruding portion of the recess 51. Te is provided, of the recess 51 of the tool insertion hole 52 as the tool of the tool when inserted into the tool insertion hole 52 is prevented from entering toward the inside than the recess 51 An inner protective wall 53 is provided on the back side of the second resin member extending to the middle of the insertion portion along the insertion portion on the side facing the insertion portion ,
The hook portion 41 is arranged so that the tip of the hook portion 41 enters between the tip of the inner protective wall 53 and the protruding portion of the recess 51 in the engaged state in which the hook portion 41 is engaged with the recess 51. It is characterized by being.
According to this, the connection between the first resin member and the second resin member can be easily attached and detached with a tool, and the tool insertion hole 52 can be removed when the engagement between the hook portion 41 and the recess 51 is released. Even if the tool is inserted from the Z direction, the inserted tool hits the inner protective wall 53 and is prevented from entering the inner direction from the recess 51, so that the inside of the apparatus is not damaged by the tool.

According to the second aspect of the present invention, there is an easily breakable portion such as the circuit board 42 on the back side of the tool insertion hole 52, and the front side of the easily breakable portion and the easily breakable portion by the tool. The internal protective wall 53 is provided at a position to prevent erroneous contact.
According to this, it is possible to effectively prevent the tool from coming into contact with a portion of the circuit board 42 or the like disposed inside the device that is easily damaged and does not particularly need to be damaged.

As shown in FIG. 5 and FIG. 6, the invention according to claim 3 is provided with a plurality of the hook portions 41, and the coupling position with the second resin member 5 is regulated by one hook portion 41 a, and the other There are a plurality of types of first resin members 4 having different protruding positions of the hook portions 41b for each model,
The coupling adjustment recess 51b that engages with the other hook portion 41b is formed with a width that allows the other hook portion 41b of the first resin member 4 of each model to be engaged, and the internal protection The wall 52 is provided so as to extend in the width direction of the coupling adjustment recess 51b.
Thus, even if the first resin member 4 is provided with a plurality of hook portions 41, one hook portion 41a is used for restricting the coupling position, and the protruding position of the other hook portion 41b is different for each model. By providing a wide width of the coupling adjustment recess 51b in accordance with the projecting position of the hook portion 41b for each model, the first resin member 4 and the second resin member 5 of each model are in a predetermined position. Even when the tool is inserted in a position where the hook 41b of the coupling adjustment recess 51b is not engaged, the inner protective wall 52 is placed in the width direction of the coupling adjustment recess 51b. Since the extension is provided, it is possible to effectively prevent the tool from entering the apparatus.

The invention according to claim 4 is characterized in that the internal protective wall 53 is provided at a position that restricts the insertion direction of the tool inserted into the tool insertion hole 52.
As described above, since the insertion direction of the tool is regulated by the internal protective wall 53, the tool can be smoothly inserted into the position where the engagement between the hook portion 41 and the concave portion 51 is disengaged. The work efficiency is improved.

The invention according to claim 5 restricts the movement of the tool so that the amount of elastic deformation of the hook portion 41 is within an allowable range when the engagement between the hook portion 41 and the concave portion 51 is released by the tool. The internal protective wall 53 is provided at a position to be provided.
As described above, since the movement of the tool is restricted by the internal protective wall 53 so that the elastic deformation amount of the hook portion 41 is within the allowable range, the hook portion 41 is excessively deformed due to excessive twisting of the tool. It can be prevented from being damaged.

  As described above, according to the present invention, the connection between one resin member (cover) and another resin member (cover) prevents the hook from coming off using the hook portion and the corresponding recess. In addition, it is possible to provide an assembly structure of a resin member in which the hook portion does not come off even when a drop impact or vibration is applied during packing or transportation. In addition, when one resin member and another resin member are configured to be detachable, the connection between the two resin members is released by releasing the engagement between the hook portion and the corresponding recess. Therefore, it is possible to provide an assembly structure of a resin member in which a tool inserted for removing the tool does not enter the apparatus.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
[Reference example]

FIG. 1 is a schematic sectional view of a frame cover of an image input apparatus according to a reference example of the present invention, and FIG. 2 is a perspective view of a principal part showing a specific apparatus configuration.
As shown in the figure, this apparatus is configured such that the first resin member 1 (hereinafter referred to as the frame upper cover 1) and the second resin member 2 (hereinafter referred to as the frame lower cover 2) are coupled to each other from the frame upper cover 1. The first hook portion 11 extends as if projecting in the pressing direction toward the vertically downward direction, and is deformed in a direction orthogonal to the extending direction.
As shown in FIG. 2, two first hook portions 11 are extended on the frame upper cover 1 end side, and the hook engaging convex portion 11a is bent inward at the tip.
Further, a rectangular hollow protrusion 26 is erected at a position facing the engagement convex portion 11a of the hook portion 11 of the lower frame cover 2, and the engagement of the hook portion of the hollow protrusion 26 is established. By providing a concave portion (hole) 21 at the wall surface position facing the convex portion 11a and engaging the engaging convex portion 11a of the first hook portion 11 with the concave portion (hole) 21, the frame upper cover 1 and the frame lower cover The cover 2 is configured to be coupled and held at a predetermined position.
The frame lower cover 2 has an extension part 22 extending as an attachment part of a third member 3 (hereinafter referred to as an operation panel cover). The operation panel cover 3 is provided so as to cover the upper surface of the extension part 22. ing.
Various operation keys 39 and a display unit (not shown) are attached to the operation panel cover 3. FIG. 2 shows a state before the display unit is attached.

The operation panel cover 3 has an upper surface that is inclined more gently toward the front side than the base side to form an extending portion 32, and a rib 31a is extended to the base side, and the vertical is hanging downward. The horizontal rib 31b is extended from the middle position of the wall 35, and the tips of the ribs 31a and 31b are at arbitrary positions on the back side of the first hook portion 11 on the opposite side of the engaging portion side to the recess (hole) 21. The first hook portion 11 is made to act so as to prevent elastic deformation in a direction in which the first hook portion 11 is detached from the engagement recess 21.
The frame upper cover 1, the frame lower cover 2, and the operation panel cover 3 are all formed of a resin member that can be elastically deformed.

  According to the reference example, in the fitting fastening including the hook 11 and the recess (hole) 21 using the elastic deformation of the frame upper cover 1 and the frame lower cover 2, the assembly is performed after the frame upper cover 1 and the frame lower cover 2 are fastened. Ribs 31a and 31b as elastic deformation preventing means are provided on the base side of the operation panel cover 3 to be provided, and the ribs 31a and 31b are located on the back side of the hook portion 11 so as to prevent the hook portion 11 from coming off. Since the protrusion is provided, it is possible to prevent the first hook portion 11 and the recess (hole) 21 from coming off even when a drop impact or vibration is applied during packing or transportation.

  Further, the operation panel cover 3 and the lower frame cover 2 have the extension portions 32 and 22 extending in the forward direction as described above, and the operation panel cover is provided on the front side of the extension portions 32 and 22. 3 and the lower frame cover 2 have a second hook 33 and a second engaging recess 23 provided on the left and right in the width direction, and the second hook 33 is detached from the engaging recess 23. Since the direction is the base side direction opposite to the front side direction, the elastic deformation preventing ribs 31a and 31b are provided in the first direction even if the operation panel cover 3 is moved in an impact direction in which the second hook 33 is removed. The first hook portion 11 is pushed in the engaging direction by colliding with the rear surface side of the hook portion 11, and the second hook 33 is also prevented from being detached from the engaging position.

  Therefore, according to such a reference example, the direction in which the second hook 33 is detached from the engagement recess 23 is the engagement pressing direction of the first hook 11. In any direction, the first hook portion 11 can be pressed in the engaging direction via the elastic deformation preventing ribs 31a and 31b located on the base side. None of the hook portions 11 is detached.

Then, after assembling the frame upper cover 1 and the frame lower cover 2, the operation panel cover 3 has the base side of the L-shaped rib 14 lower surface (facing surface) 14 a of the frame upper cover 1 and the frame lower cover 2. After being inserted into the rectangular gap between the base surfaces 25, the second hook 33 is engaged with and fixed to the engagement recess 23 of the lower frame cover 2.
Therefore, if the operation panel cover 3 is assembled before or simultaneously with the frame upper cover 1 and the frame lower cover 2, the deformation preventing ribs 31a and 31b obstruct the frame upper cover 1 and the frame lower cover 2. However, since the operation panel cover 3 is assembled after the frame upper cover 1 and the frame lower cover 2 are assembled, the deformation preventing ribs 31a and 31b are connected to the first hook portion 11. Can be close to the back.

  Further, the lower surface (facing surface 14a) of the L-shaped rib 14 of the frame upper cover 1 is located on a surface orthogonal to the hook pressing direction (A direction), and faces the locking surface 34 on the operation panel cover 3 side. The engaging surface 34 and the lower surface of the L-shaped rib 14 (facing surface 14a) with the hook portion 11 of the first resin member 1 engaged with the recess 21 of the lower frame cover 2 ) Is close or in contact. As a result, even if a drop impact during conveyance or vibration is applied in the pressing direction, it is absorbed by the locking surface 34 and the facing surface 14a, and the impact applied to the hook portion 11 is reduced.

Each of the upper surface of the operation panel cover 3 and the lower surface of the lower frame cover 2 has extension portions 32 and 22 extending in the front direction, and the operation panel on the front side of the extension portions 32 and 22. The cover 3 and the lower frame cover 2 are connected to each other by the second hook 33 and the second engagement recess 23, and on the base side of the operation panel cover 3, a vertical for providing elastic deformation ribs 31a and 31b. The wall 35 is suspended and the lower surface 35a of the vertical wall 35 is fixed to the base surface 25 of the frame lower cover 2 to function as a position restricting portion (25, 35a).
According to this reference example, the position restricting portion (25, 35a) where the operation panel cover 3 and the frame lower cover 2 are fixed is formed on the vertical wall 35 which is the attachment portion of the ribs 31a, 31b. Therefore, even if a drop impact during transportation or a vibration in the pressing direction is directly applied to the operation panel cover 3, the position control parts (25, 35a) where the operation panel cover 3 and the lower frame cover 2 are fixed are absorbed. The impact applied to the hook part 11 is alleviated.
Thus, when the third member is the operation panel cover, it is possible to prevent damage to the operation keys and the display panel arranged on the operation panel.

Further, the frame upper cover 1 and the frame lower cover 2 are provided with recesses 18 and 28 that are in contact with each other on the opposite side of the engagement portion 21 and the recesses are screwed together with screws 27. The engagement structure according to 29) can also be taken.
〔Example〕

The present embodiment will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the component same as the previous reference example.
FIG. 3 is an overall perspective view of an image reading apparatus in which the resin member assembly structure according to the present embodiment is used. In this image reading apparatus, a resin operation unit cover 4 (first resin member) on which an operation panel 4a having various operation keys is provided is located on the upper surface in the front side of the figure. The part cover 4 is also attached to the lower main body frame 5 (second resin member) made of resin. In the drawing, the back side is an image reading unit on which a document is placed, and an upper body frame 5b made of resin is attached on the lower body frame 5, and the document reading unit cover 5a is positioned thereon. Yes. When reading a document, the document reading unit cover 5a is lifted up, and the document is placed on a document reading table (not shown).

  FIG. 4 shows a cross-sectional view of the front side of this image reading apparatus (side on which the operation unit panel 4a is provided) viewed from the S direction. The operation portion cover 4 and the lower body frame 5 are engaged with a hook portion 41 protruding from the operation portion cover 4 and a recess 51 formed on the lower body frame 5 side. And the lower body frame 5 are coupled and held at a predetermined position. Two hook portions 41 and two concave portions 51 are provided on the operation portion cover 4 and the lower main body frame 5, respectively, and the concave portions 51 are provided at the press storage positions of the respective hook portions 41. When attaching the operation unit cover 4 to the lower main body frame 5, the positions of the hook portions 41 and the recesses 51 are aligned, and the operation unit cover 4 is placed on the lower main body frame 5 and pressed. Thereby, the hook part 41 fits into the recessed part 51, and the operation part cover 4 and the lower main body frame 5 are couple | bonded.

  Referring to FIG. 5 which is an enlarged view of a portion D in the drawing, and a tool for inserting a tool such as a flat-blade screwdriver in the lower main body frame 5 in order to disengage the engagement between the hook portion 41 and the recess 51. An insertion hole 52 is provided so as to open from the surface thereof. These tools are inserted into the tool insertion hole 52, the tip of the tool is hooked on the tip of the hook part 41, and the tool is twisted in the C direction. The hook portion 41 is detached from the recess 51, the engagement between the hook portion 41 and the recess 51 is released, and the operation portion cover 4 can be easily removed from the lower body frame 5. A circuit board 42 is attached to the internal space located on the back side of the operation unit cover 4, and the circuit board 42 exists on the back side when viewed from the tool insertion hole 52, but the lower body frame 5 Since the distance from the surface to the circuit board 42 is shorter than the length of a generally used tool, if the tool inserted into the tool insertion hole 52 enters beyond the recess 51, the tool breaks. There is a risk of it.

  However, an internal protective wall 53 is provided on the back side of the lower main body frame 5 so as to face the tool insertion hole 52, and the internal protective wall 53 is located on the front side of the circuit board 42. Even when the tool is inserted into the hole 52 from the Z direction in the figure, the tool hits the inner protective wall 53 and stops, so that the tool enters the inner direction from the recess 51 and contacts the circuit board 42. Can be prevented.

  Further, in order to disengage the engagement between the hook portion 41 and the recess 51, it is necessary to insert the tool in the Y direction in the figure and position the tip of the tool at the tip of the hook portion 41 and then pry it in the C direction. . Here, since the internal protective wall 53 extends in substantially the same direction as the Y direction, the insertion direction of the tool inserted into the tool insertion hole 52 is restricted in the Y direction by the internal protective wall 53, and the tool Can smoothly reach the tip of the hook portion 41.

  Further, after the tip of the tool reaches the tip of the hook part 41, the tool is squeezed to deform the hook part 41 in the C direction. However, the amount of movement of the tool is limited by the presence of the internal protective wall 53. Then, by restricting the movement of the tool so that the elastic deformation amount of the hook portion 41 is within the allowable range by the internal protective wall 53, it is possible to prevent the hook portion 41 from being damaged by excessively prying the tool.

  Next, referring also to FIG. 6, which is a bottom view of the lower main body frame 5, the operation portion cover 4 is provided with two hook portions 41, and the lower main body frame 5 is provided with each hook portion 41. Correspondingly, two recesses 51 are provided. There are a plurality of models of the image reading apparatus according to the present embodiment, and all of these models have the same main body, but only the operation unit including the operation unit cover 4 and the substrate 42 attached to the operation unit cover 4 is provided. Is different. Since the arrangement and size of the operation panel differ depending on the model, the protruding position of the hook 41 provided on the operation unit cover 4 also differs depending on the model, but the two hooks 41 (41a, 41b) have different positions. One of the hook portions 41a restricts the coupling position with the lower main body frame 5, and is engaged with a recess 51a having a width approximately equal to the width of the tip of the hook portion 41a.

  On the other hand, the protruding position of the other hook portion 41b differs depending on each model. For this reason, the width c of the concave portion (coupling adjustment concave portion) 51b that engages with the hook portion 41b is formed longer than the width d of the concave portion 51a so as to be engageable with the hook portion 41b of each model. The inner protective wall 53 is provided extending in the width direction of the recess 51b. When the width of the recess 51b is increased, the difference between the width b of the tip of the hook portion 41b and the width c of the recess 51b is increased, and the tool insertion hole 52b is released when the engagement between the hook portion 41b and the recess 51b is released. Although there is a high possibility that the tool will be inserted into a position where the inner hook portion 41b does not exist, the inner protective wall 53 extends in the width direction of the concave portion 51b. Intrusion into the equipment can be prevented. This also allows the width of the recess 51b and the tool insertion hole 52b extending to the recess 51b to be made large, thereby increasing the degree of design freedom.

  In the above-described embodiments, the image input device and the image reading device have been described as examples. However, the present invention is not limited to this, and the present invention can be applied to all assembly structures of resin members using hook engagement.

1 is a schematic cross-sectional view of a frame cover of an image input apparatus according to a reference example of the present invention. It is a principal part perspective view which shows the specific apparatus structure of FIG. 1 is an overall perspective view of an image reading apparatus using an assembly structure of resin members according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of the front side portion of the image reading apparatus in FIG. 3 as viewed from the S direction. It is an enlarged view of D section of FIG. FIG. 4 is a bottom view of the lower main body frame of the image reading apparatus of FIG. 3. It is sectional drawing for demonstrating the assembly structure of the conventional resin member.

Explanation of symbols

1 First resin member (frame top cover)
2 Second resin member (frame lower cover)
3 Third member 4 First resin member (operation unit cover)
5 Second resin member (lower body frame)
6 Tool 11, 41 Hook part 14a Confronting surface 21, 51 Recess (hole)
31a, 31b Elastic deformation prevention means (rib)
22 and 32 extension part 23 2nd engagement recessed part 25 Position control part (base surface)
33 Second hook 34 Locking surface 35 Position restricting portion (vertical wall)
35a position restriction part (bottom surface)
42 Circuit board 52 Tool insertion hole 53 Internal protective wall

Claims (5)

The first resin member and the second resin member are coupled to each other by a hook portion that protrudes in the pressing direction from the first resin member and deforms in a direction different from the pressing direction by elastic deformation, and the second resin member side And the first resin member and the second resin member are positioned at a predetermined position by engaging the hook portion with the concave portion. In the assembly structure of the resin member that is coupled and held in
The concave portion is formed by an insertion portion extending in the pressing direction and a protruding portion protruding from the insertion portion in a direction in which the hook portion is elastically deformed,
A tool insertion hole for inserting a tool to disengage the engagement between the hook and the recess is provided to open from the surface of the second resin member so as to face the protruding portion of the recess , When the tool is inserted into the tool insertion hole, the insertion is performed on the side of the tool insertion hole facing the insertion portion of the recess so as to prevent the tool from entering inward of the recess. Providing an inner protective wall on the back side of the second resin member that extends in the inner direction along the portion to the middle of the insertion portion ,
The hook portion is arranged so that a tip of the hook portion enters between the tip of the internal protective wall and the protruding portion of the recess in an engaged state in which the hook portion is engaged with the recess. An assembly structure of resin members.   There is an easily breakable part such as a circuit board on the back side of the hole for inserting the tool, and the internal part is located at a position on the front side of the easily breakable part and preventing erroneous contact with the easily breakable part by the tool. 2. The resin member assembly structure according to claim 1, further comprising a protective wall. A plurality of the hook portions are provided, a coupling position with the second resin member is restricted by one hook portion, and there are a plurality of types of first resin members with different projecting positions of the other hook portion for each model,
The coupling adjustment recess that engages with the other hook part is formed with a width that allows the other hook part of the first resin member of each model to be engaged, and the inner protective wall is coupled with the coupling part. The resin member assembly structure according to claim 1, wherein the resin member assembly is provided so as to extend in a width direction of the adjustment concave portion.   The resin member assembly structure according to claim 1, wherein the inner protective wall is provided at a position that restricts an insertion direction of the tool to be inserted into the tool insertion hole.   The inner protective wall is provided at a position for restricting the movement of the tool so that the amount of elastic deformation of the hook is within an allowable range when the hook is disengaged from the recess by the tool. The assembly structure of the resin member according to claim 1.

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