JP3972458B2 - Locking structure and component fixture - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking structure for attaching a component to a main body and a component fixture.
[0002]
[Prior art]
Conventionally, a screw is frequently used as a component mounting tool for mounting a component to a main body. However, in general, since a plurality of screws are required, there are disadvantages that the number of parts increases and the number of screwing steps increases. Therefore, a dedicated component fixture has been used.
FIGS. 5A, 5B, 6A, and 6B are a partial cross-sectional side view and a plan view showing an example of a conventional component fixture.
This component fixture is composed of two components, a strike 20 attached to the main body shown in FIG. 5 and a latch 30 attached to the component shown in FIG.
[0003]
In the strike 20, a substantially cylindrical latching convex portion 22 having an outer diameter smaller than the outer diameter of the flange 21 is integrally provided on one side of the disc-shaped flange 21, and the other side of the flange 21 is provided. A substantially cylindrical main body convex portion 23 having an outer diameter smaller than the outer diameter of the flange 21 is integrally provided.
The leading end of the latching convex portion 22 is formed in a spherical shape. The main body convex portion 23 is formed with a plurality of rows (three rows in this example) of protrusions 23a having a triangular cross section along the entire outer periphery.
[0004]
In the latch 30, a substantially cylindrical component projection 32 having an outer diameter smaller than the outer diameter of the flange 31 is integrally provided on one side of the ring-shaped flange 31. The strike convex part 33 having a substantially hollow truncated cone shape having a minimum inner diameter smaller than the diameter of the tip part of the latch convex part 22 of the strike 20 and lower than the height of the latch convex part 22 is integrally formed. Is provided.
The component protrusions 32 are formed with substantially triangular pyramidal protrusions 32a at equal angular intervals (in this example, at intervals of 60 degrees) from the middle of the outer peripheral portion to the open end. In the strike convex portion 33, cuts 33a are formed at equiangular intervals (in this example, at intervals of 120 degrees) from the fixed end to the open end.
[0005]
A case in which a speaker grille is attached to, for example, a television housing using the component mounting tool including the strike 20 and the latch 30 having such a configuration will be described with reference to FIG.
Here, the mounting portion of the speaker grille 50 of the television housing 40 has a diameter smaller than the outer diameter of the protruding portion 23a formed on the main body convex portion 23 of the strike 20, and is the smallest of the main body convex portion 23. A hole 41 having an inner diameter larger than the outer diameter is provided in advance. Furthermore, the speaker grille 50 has an inner diameter that is smaller than the maximum outer diameter of the protrusion 32 a formed on the component convex portion 32 of the latch 30 and is substantially the same as the minimum outer diameter of the component convex portion 32. The hole 51 is provided in advance.
[0006]
First, the main body convex portion 23 of the strike 20 is aligned with the hole 41 provided in the housing 40 of the television set, and the main body convex portion 23 is perforated until the end surface of the flange 21 of the strike 20 contacts the wall end surface of the hole 41. Press fit into 41. As a result, the protrusion 23a formed on the main body projection 23 is elastically deformed in the hole 41 and frictionally engaged with the inner wall of the hole 41, so that the strike 20 is difficult to be detached from the housing 40 of the television.
On the other hand, the component convex portion 32 of the latch 30 is aligned with the hole 51 provided in the speaker grille 50, and the component convex portion 32 is placed in the hole 51 until the end surface of the flange 31 of the latch 30 contacts the wall end surface of the hole 51. Press fit into. As a result, the protrusion 32 a formed on the component projection 32 is once elastically deformed in the hole 51 and then restored outside the hole 51 and is caught by the wall end surface of the hole 51, so that the latch 30 is detached from the speaker grille 50. It becomes difficult.
[0007]
Next, the latch convex portion 22 of the strike 20 is inserted into the strike convex portion 33 of the latch 30, and the constricted portion near the distal end portion of the latch convex portion 22 contacts the distal end portion of the strike convex portion 33. The latch convex portion 22 is press-fitted into the strike convex portion 33. As a result, the strike convex portion 33 is elastically deformed once at the tip portion of the latch convex portion 22 and then restored by the constricted portion and is caught by the constricted portion, so that the strike 20 is difficult to come off from the latch 30. As described above, the speaker grill 50 can be attached to the housing 40 of the television.
[0008]
[Problems to be solved by the invention]
Since the above-described conventional component fixture is composed of two components, that is, the strike 20 and the latch 30, there is a drawback that the number of components increases and the number of mounting steps increases. Moreover, in the conventional component fixture, since the tip spherical portion of the latch convex portion 22 of the strike 20 is configured to lock the space between the TV housing 40 and the speaker grille 50, the area of the lock portion is wide. There was a drawback that the fastening force was low.
[0009]
Furthermore, when an impact is applied to the conventional component mounting tool, since the area of the lock portion is narrow, the impact force concentrates there, and there is a disadvantage that the probability that the latch convex portion 22 of the strike 20 is damaged increases. . In addition, in the conventional component mounting tool, when the relative mounting position of the TV casing 40 and the speaker grille 50 varies, the mutual positions of the strike 20 and the latch 30 also vary, so the fastening force rapidly decreases. For example, the speaker grill 50 may fall off from the housing 40 while the television is being transported.
[0010]
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a locking structure and a component fixture that have a simple structure, a high fastening force, and a low risk of breakage or dropout. .
[0011]
[Means for Solving the Problems]
The above object is a locking structure according to the present invention, which is a locking structure comprising an engaging portion provided in a component fixture attached to a main body and an engaging hole provided in a component. engaging portion includes a stopper portion of a hollow frustoconical planted in a direction away from the body, contiguous with the stopper portion, and the fitting portion of the cylindrical shape having an outer diameter of the small diameter and the diameter of the stopper portion, The cross section formed over the entire circumference of the outer peripheral portion of the open end of the fitting portion includes a semicircular projection. Further, the engaging portion is provided with a predetermined number of cuts at equal intervals in the axial direction of the fitting portion up to a predetermined portion of the protrusion, the fitting portion, and the stopper portion. Engaging holes is continuous with the first hole portion of the stopper portion and the same shape, the first hole portion, have a inner diameter and length outside diameter and substantially the same fitting portion, a first hole and it includes a second hole portion having a chamfered portion, to the end opposite the section. When the engaging portion is inserted into the engaging hole portion, the protrusion of the engaging portion is elastically deformed by being guided by the first hole portion of the engaging hole portion, and the protrusion is the second hole. This is achieved by locking to the chamfered part of the part .
Further, the above object is the component mounting tool of the present invention, in which the one end side is mounted on the main body and the engaging portion is provided on the other end side, and the engaging portion is provided on the component. In the component fixture in which the part is attached to the main body by being inserted into the engaging hole and locked, the engaging part is a hollow truncated cone that is implanted in a direction away from the main body. A stopper portion having a shape, a cylindrical fitting portion that is continuous with the stopper portion and has an outer diameter that is the same as the small diameter of the stopper portion, and the entire circumference of the outer peripheral portion of the open end of the fitting portion. cross section is provided with a semicircular protrusion. Further, the engaging portion is provided with a predetermined number of cuts at equal intervals in the axial direction of the fitting portion up to a predetermined portion of the protrusion, the fitting portion, and the stopper portion. Engaging hole portion includes a first hole portion of the stopper portion and the same shape, the continuous to the first hole portion, have a outer diameter substantially the same inner diameter and the length of the fitting portion, the first and a second hole portion having a chamfered portion at an end portion of the hole opposite when the engaging portion is inserted into the engaging hole, the engaging portion, the projection is the engagement hole This is achieved by being guided and elastically deformed by the first hole portion of the portion, and the projection engaging with the chamfered portion of the second hole portion.
[0012]
According to the above configuration, since the component and the main body are attached by the protrusion provided on the integrally formed convex portion, the structure can be simplified and the fastening force can be increased. .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.
[0014]
1A, 1B, and 1C are a side view, a plan view, and a partial cross-sectional side view showing an embodiment of a component fixture of the present invention.
This component fixture 10 is composed of one component, and a substantially cylindrical main body convex portion 12 having an outer diameter smaller than the outer diameter of the flange 11 is formed on one side of the ring-shaped flange 11. A substantially hollow truncated cone-shaped stopper portion 13 having an outer diameter smaller than the outer diameter of the flange 11 and the stopper portion 13 are provided on the other side of the flange 11, and the stopper 13 has a smaller diameter. A component convex portion 15 which is an engaging portion composed of a substantially cylindrical fitting portion 14 having the same outer diameter is integrally provided.
[0015]
The main body convex portion 12 is formed with a plurality of rows (6 rows in this example) of protrusions 12a having a triangular cross section along the entire outer periphery. The component convex portion 15 has cuts 15a formed at equal angular intervals (in this example, at intervals of 120 degrees) from the middle of the stopper portion 13 to the open end of the fitting portion 14, and at the open end of the fitting portion 14. A protrusion 15b having a semicircular cross section is formed over the entire circumference of the outer peripheral portion.
[0016]
A case where a speaker grille is attached to, for example, a television casing using the component mounting member 10 having such a configuration will be described with reference to FIG.
Here, the mounting portion of the speaker grille 50 of the television housing 40 has a smaller diameter than the outer diameter of the protruding portion 12a formed on the main body convex portion 12 of the component fixture 10, and the main body convex portion 12 has. A hole 42 having an inner diameter larger than the minimum outer diameter is provided in advance. Further, as shown in FIG. 3, the speaker grill 50 has a first hole 52 a that is substantially the same shape as the stopper portion 13 of the component convex portion 15 of the component fixture 10, and a hole 52 a that is continuous with the hole 52 a. A hole 52 which is an engagement hole portion formed by a hole 52b which is a second hole having an inner diameter substantially the same as the minimum outer diameter of the joint portion 14 is provided in advance.
[0017]
First, the convex portion 12 for the main body of the component fixture 10 is aligned with the hole 42 provided in the housing 40 of the television set, and the convex portion for the main body until the end surface of the flange 11 of the component fixture 10 contacts the wall end surface of the hole 42. The part 12 is press-fitted into the hole 42. As a result, the protrusion 12a formed on the main body projection 12 is elastically deformed in the hole 42 and frictionally engaged with the inner wall of the hole 42, so that the component fixture 10 is difficult to be detached from the housing 40 of the television. . At this time, an adhesive may be poured into the hole 42 to fix the component fixture 10.
[0018]
Next, the component convex portion 15 of the component fixture 10 is inserted into the hole 52 provided in the speaker grill 50, and the outer peripheral portion of the stopper portion 13 of the component convex portion 15 is set to the inner peripheral portion of the hole 52a. The component convex portion 15 is press-fitted into the hole 52 until contact is made. As a result, the fitting portion 14 of the component convex portion 15 is once elastically deformed in the hole 52b, and then restored when the protrusion 15b formed on the fitting portion 14 goes out of the hole 52b to be restored to the hole 52b. At the same time, the projection 15b is caught on the wall end surface which is a chamfered portion of the hole 52b, so that the component fixture 10 is difficult to come off from the speaker grille 50. As described above, the speaker grill 50 can be attached to the housing 40 of the television.
When the speaker grill 50 is removed from the housing 40 of the television, for example, a minus driver is inserted into the hole 52 and rotated so that the protrusion 15b formed on the fitting portion 14 of the component convex portion 15 is removed. It should be separated from the wall end face of the hole 52b.
[0019]
4A and 4B are a side view and a plan view showing another embodiment of the component fixture of the present invention, and the same components as those of the component fixture shown in FIG. Description is omitted.
Compared with the component fixture 10 of FIG. 1, the component fixture 16 differs from the configuration in that the main body convex portion 12 is not provided and the flange 11 is provided with a main body attachment screw hole 17. It has become.
[0020]
When, for example, the speaker grille 50 is attached to the television housing 40 using the component fixture 16 having such a configuration, the speaker grille attachment portion of the television housing 40 has a hole 42 as shown in FIG. There is no need to provide in advance, and the component fixture 16 is attached in advance using screws. 1 is inserted into the hole 52 provided in the speaker grille 50, and the stopper portion 13 of the component protrusion 15 is inserted. The component convex portion 15 is press-fitted into the hole 52 until the outer peripheral portion comes into contact with the inner peripheral portion of the hole 52a. As a result, the fitting portion 14 of the component convex portion 15 is once elastically deformed in the hole 52b, and then restored when the protrusion 15b formed on the fitting portion 14 goes out of the hole 52b to be restored to the hole 52b. At the same time, the protrusion 15b is caught on the wall end surface of the hole 52b, so that the component fixture 16 is difficult to come off from the speaker grille 50. As described above, the speaker grill 50 can be attached to the housing 40 of the television.
[0021]
Whereas the conventional component fixture is composed of two parts, the strike 20 and the latch 30, the component fixtures 10 and 16 of the present embodiment are composed of a single component. The number of mounting steps can be reduced, and the simple shape of a substantially cylindrical shape eliminates the need for a complicated mechanism such as a slide portion in the mold for molding, thus reducing the manufacturing cost. be able to.
Moreover, in the conventional component fixture, since the tip spherical portion of the latch convex portion 22 of the strike 20 is configured to lock the space between the TV housing 40 and the speaker grille 50, the area of the lock portion is wide. The fastening force was low, but in the component fixtures 10 and 16 of this embodiment, the space between the TV casing 40 and the speaker grille 50 is locked by the circumferential portion of the projection 15b of the component projection 15. Since it is comprised so that the area of a lock | rock part can be taken widely, the fastening force can be raised.
[0022]
Further, when an impact is applied to the conventional component mounting tool, the area of the lock portion is small, so that the impact force is concentrated there, and the probability that the latch convex portion 22 of the strike 20 is damaged is high. Even if an impact is applied to the component fittings 10 and 16, since the area of the lock portion is large and the impact force is dispersed, damage can be prevented.
In addition, in the conventional component mounting tool, when the relative mounting position of the TV casing 40 and the speaker grille 50 varies, the mutual positions of the strike 20 and the latch 30 also vary, so the fastening force rapidly decreases. For example, there is a possibility that the speaker grille 50 may fall out of the housing 40 while the television is being transported. However, in the component fixtures 10 and 16 of the present embodiment, the component convex portion 15 is bent to absorb the above variation, Since the fastening force itself is high as described above, it is possible to prevent the dropout.
Further, when the speaker grille 50 is attached to the component attachments 10 and 16 of the present embodiment, a click feeling and a click sound are generated, so that the attachment reliability can be improved.
[0023]
In each of the above-described embodiments, the component projections 15 of the component fixtures 10 and 16 are configured as cylindrical members in which cuts 15a are formed at equal angular intervals in the axial direction. The present invention is not limited, and it may not be equiangular as long as two or more cuts can be formed, and the cross section may be configured as an elliptical or polygonal cylindrical member. Further, it may be constituted by a plurality of members arranged on the circumference and elastically deformable in the outer and inner circumferential directions.
Moreover, the component attachments 10 and 16 of each embodiment mentioned above are applicable not only when attaching the speaker grille 50 to the housing | casing 40 of a television but when attaching interior components in the inside of a car, for example. .
[0024]
【The invention's effect】
As described above, according to the present invention, a simple structure can be achieved, the fastening force can be increased, and breakage and dropout can be prevented.
[Brief description of the drawings]
FIG. 1 is a side view, a plan view, and a partially sectional side view showing an embodiment of a component fixture of the present invention.
2 is a cross-sectional side view showing a method of attaching the component fixture of FIG. 1;
3 is a cross-sectional side view showing a structure of a main body attached by the component fixture of FIG. 1. FIG.
FIGS. 4A and 4B are a side view and a plan view showing another embodiment of the component fixture of the present invention. FIGS.
FIGS. 5A and 5B are a partial cross-sectional side view and a plan view showing an example of a conventional component fixture. FIGS.
FIGS. 6A and 6B are a partial cross-sectional side view and a plan view showing an example of a conventional component fixture. FIGS.
7 is a cross-sectional side view showing a method of attaching the component fixture of FIGS. 5 and 6. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Component fixture, 11 ... Flange, 12 ... Main part convex part, 12a ... Projection part, 13 ... Stopper part, 14 ... Fitting part, 15 ... Parts Convex part, 15a ... notch, 15b ... projection, 40 ... television casing, 50 ... speaker grille, 42, 52, 52a, 52b ... hole

Claims (2)

A locking structure comprising an engagement portion provided in a component fixture attached to the main body and an engagement hole provided in the component,
The engaging portion is
A hollow frustoconical stopper portion planted in a direction away from the main body,
A cylindrical fitting portion that is continuous with the stopper portion and has an outer diameter that is the same as the small diameter of the stopper portion;
A projection formed in a semicircular cross section formed over the entire circumference of the outer peripheral portion of the open end of the fitting portion;
Equipped with a,
Up to a predetermined portion of the protrusion, the fitting portion, and the stopper portion, a predetermined number of cuts are provided at equal intervals in the axial direction of the fitting portion,
The engagement hole is
A first hole having the same shape as the stopper,
Continuous to said first hole portion, have a outer diameter identical inner diameter and length and of the fitting portion, the second hole portion having a chamfered portion at an end opposite to the first hole portion When,
Equipped with a,
When the engaging portion is inserted into the engaging hole portion, the engaging portion is elastically deformed by the protrusion being guided by the first hole portion of the engaging hole portion, and the protrusion is A locking structure characterized by locking to the chamfered portion of the two holes. A component fixture having one end attached to the main body and an engagement portion provided on the other end, and the engagement portion is inserted into and engaged with an engagement hole provided in the component. In the component fixture designed to mount the component on the main body,
The engaging portion is
A hollow frustoconical stopper portion planted in a direction away from the main body,
A cylindrical fitting portion that is continuous with the stopper portion and has an outer diameter that is the same as the small diameter of the stopper portion;
A projection formed in a semicircular cross section formed over the entire circumference of the outer peripheral portion of the open end of the fitting portion;
Equipped with a,
Up to a predetermined portion of the protrusion, the fitting portion, and the stopper portion, a predetermined number of cuts are provided at equal intervals in the axial direction of the fitting portion,
Engaging hole portion has a first hole of the same shape as the stopper portion, continuous to the first hole portion, have a outer diameter identical inner diameter and length and of the fitting portion, wherein and a second hole portion having a chamfered portion at the end opposite to the first hole portion,
When the engaging portion is inserted into the engaging hole portion, the engaging portion is elastically deformed by the protrusion being guided by the first hole portion of the engaging hole portion, and the protrusion is A component fitting that is locked to the chamfered portion of the two holes.

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