JPH0726571Y2 - Locking structure of stopper - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper locking structure for mounting a cover for a fluorescent lamp to a base member.

[0002]

2. Description of the Related Art Generally, as a method of attaching a cover of a fluorescent lamp to a base member, a screw hole into which a screw can be screwed is formed in the base member, and the screw is inserted into the cover to insert the screw. By screwing the end portion into the screw hole, the cover is locked to the base member via the screw.

[0003]

In the mounting method described above, when the cover is fixed to the base member, the tip of the screw shaft portion of the screw is screwed into the screw hole so that the head portion of the screw is fixed. It is necessary to screw the screw to the base member until it comes into pressure contact with the cover, and therefore it takes time and effort to tighten the screw, especially when the mounting work is at a high place. It is difficult to work together and workability is poor.

The present invention was developed in view of the above circumstances, and an object of the present invention is to provide a stopper locking structure capable of locking the stopper in the engaging hole of the fixing member with one touch. To provide.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, however, in a stopper locking structure in which an engaging hole 8 formed in a base member 1 is inserted and locked, the stopper 3 is replaced by a head 4 And an insertion shaft portion 5 having a circular cross section that is inserted into the engagement hole 8, a locking groove 60 extending in the circumferential direction is formed on the outer peripheral surface of the insertion shaft portion 5, and the insertion shaft portion 5 is formed. A notch 7 extending in the axial direction is provided on one side of the outer peripheral surface of the
Is formed from an arcuate inner surface 81 that is larger than the diameter of the arcuate outer peripheral surface of the insertion shaft portion 5 and an engagement inner surface 82 that corresponds to the cutout portion 7 of the insertion shaft portion 5. The distance L1 from the center position in the length direction through the center of the engaging hole 8 to the arcuate inner surface 81 is made substantially equal to the diameter L2 of the groove bottom of the locking groove 60 in the insertion shaft portion 5. It is a feature.

[0006]

According to the present invention, when the member to be attached is attached to the base member 1, after the insertion shaft portion 5 of the stopper 3 is inserted into the attachment member, the notch 7 of the insertion shaft portion 5 is removed. The insertion shaft portion 5 is further axially inserted into the engagement hole 8 in accordance with the engagement inner surface 62 of the engagement hole 8, and the stopper 3 is angularly rotated in the circumferential direction at a desired position. Only then, the engaging inner surface 82 and the arcuate inner surface 81 of the engaging hole 8 are immediately fitted into the locking groove 60 facing the inner peripheral surface of the engaging hole 8 to fix the stopper 3. It can be locked to the base plate 1.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the drawings, 1 is a base plate, 2 is a member to be attached to the base plate 1, and the member to be attached 2 is attached to the base plate 1 via a stopper 3.

The stopper 3 is composed of a cylindrical head portion 4 and an insertion shaft portion 5 standing upright from the head portion 4 and having a circular cross section. A screw 6 is provided around the outer periphery of the insertion shaft portion 5. Install the screw 6
While the thread groove of the insertion shaft portion 5 is used as the locking groove 60, a part of the outer circumference of the insertion shaft portion 5 is cut in the axial direction to form a smooth cutout portion 7 extending in the axial direction on one side of the outer peripheral surface of the insertion shaft portion 5. Is provided.

On the other hand, the base plate 1 includes an arcuate inner surface 81 larger than the diameter of the arcuate outer peripheral surface of the insertion shaft portion 5 and an engagement inner surface 82 corresponding to the cutout portion 7 of the insertion shaft portion 5. The engaging hole 8 is formed, and the distance L1 from the center position of the engaging inner surface 82 in the longitudinal direction through the center of the engaging hole 8 to the arc-shaped inner surface 81 is set to the insertion shaft portion 5 at the distance L1. It is made equal to the diameter L2 of the groove bottom of the locking groove 60.

Reference numeral 21 in the drawing denotes an insertion hole formed in the member 2 to be attached, through which the insertion shaft portion 5 can be inserted.

In order to assemble the attached member 2 to the base plate 1, the insertion shaft portion 5 of the stopper 3 is inserted from the insertion hole 21 of the attached member 2 into the engagement hole 8 of the base plate 1. When inserting the insertion shaft portion 5 into the engagement hole 8, the notch 7 of the insertion shaft portion 5 is aligned with the engagement inner surface 62 of the engagement hole 8 as shown in FIG. 1. As a result, the insertion shaft portion 5 can be freely inserted into the engagement hole 8 in the axial direction. Then, the upper surface of the mounted member 2 is brought into contact with the lower surface of the base plate 1, and the insertion shaft portion 5 is engaged with the engagement hole 8 until the head 4 of the stopper 3 comes into contact with the lower surface of the mounted member 2. The stopper 3 in the circumferential direction.
When rotated once, as shown in FIG. 2, the engaging inner surface 82 and the arcuate inner surface 81 of the engaging hole 8 are immediately formed in the locking groove 60 facing the inner peripheral surface of the engaging hole 8. By fitting, the stopper 3 can be locked to the base plate 1.

In the above embodiment, however, the thread groove of the screw 6 provided around the outer circumference of the insertion shaft portion 5 is used as the locking groove 60. The engaging inner surface 82 and the arcuate inner surface 81 of the engaging hole 8 are fitted in the engaging groove 60, and the stopper 3 is screwed into the base plate 1 side for a predetermined stroke, so that the mounted member 2 is stopped by the stopper member 2. As a result of being pushed toward the base plate 1 side by the screwing of the tool 3, the attached member 2 can be firmly attached to the base plate 1.

In the embodiment described above, the screw 6 is provided around the outer circumference of the insertion shaft portion 5 and the thread groove of the screw 6 is used as the locking groove 60. A plurality of locking grooves 60 may be provided around the outer circumference in the circumferential direction.

Further, in the above-mentioned embodiments, a smooth cutout portion 7 extending in the axial direction is provided on one side of the outer circumference of the insertion shaft portion 5, and the smooth cutout portion is formed in the engaging hole 8 formed in the base plate 1. Although the engaging inner surface 82 corresponding to 7 is formed, as shown in FIG. 5, a notch 7 having a V-shaped cross section is provided on one side of the outer periphery of the insertion shaft portion 5 and the engaging hole 8 is formed. A chevron-shaped engagement inner surface 82 corresponding to the cutout portion 7 may be formed.

Further, in the above embodiment, the engaging inner surface 82
The distance L1 from the center position in the longitudinal direction through the center of the engaging hole 8 to the arc-shaped inner surface 81 is made equal to the diameter L2 of the groove bottom of the locking groove 60 in the insertion shaft portion 5, A distance L1 from the center position in the longitudinal direction of the engagement inner surface 82 to the arc-shaped inner surface 81 through the center of the engagement hole 8.
May be slightly shorter than the diameter L2 of the groove bottom of the locking groove 60 in the insertion shaft portion 5, or the center of the engagement hole 8 from the center position in the longitudinal direction of the engagement inner surface 82. The distance L1 through the arc-shaped inner surface 81 is shorter than the diameter of the arc-shaped outer peripheral surface of the insertion shaft portion 5,
Moreover, it may be longer than the diameter L2 of the groove bottom of the locking groove 60 in the insertion shaft portion 5.

[0016]

As described above, according to the present invention, in the locking structure of the stopper which is inserted and locked in the engaging hole 8 formed in the base member 1, the stopper 3 is attached to the head 4 and the engaging portion. A locking groove 60 that is formed from the insertion shaft portion 5 having a circular cross section that is inserted into the fitting hole 8 and that extends in the circumferential direction on the outer peripheral surface of the insertion shaft portion 5.
While forming a notch 7 extending in the axial direction on one side of the outer peripheral surface of the insertion shaft portion 5, the engagement hole 8 has a circle larger than the diameter of the arc-shaped outer peripheral surface of the insertion shaft portion 5. It is formed from an arc-shaped inner surface 81 and an engagement inner surface 82 corresponding to the cutout portion 7 of the insertion shaft portion 5, and passes from the center position of the engagement inner surface 82 in the longitudinal direction through the center of the engagement hole 8 to form the circle. Arc-shaped inner surface 8
By setting the distance L1 reaching 1 to be substantially equal to the diameter L2 of the groove bottom of the locking groove 60 in the insertion shaft portion 5,
When the attached member is attached to the base member 1, the notch portion 7 of the insertion shaft portion 5 inserted through the attached member is formed into the engagement hole 8.
The insertion shaft portion 5 is axially inserted into the engagement hole 8 in accordance with the engagement inner surface 62 of the above, and the stopper 3 is angularly rotated in the circumferential direction at a desired position, so that the engagement is immediately performed. The stopper 3 is locked to the base plate 1 by fitting the engagement inner surface 82 and the arc-shaped inner surface 81 of the engagement hole 8 into the locking groove 60 facing the inner peripheral surface of the hole 8. Therefore, the stopper 3 can be immediately locked to the engaging hole 8 in the base plate 1.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part showing an embodiment of a locking structure of a stopper according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing a state in which a member to be attached is attached to a base member by a fastener.

FIG. 3 is an explanatory view showing an example of a locking structure of the stopper.

FIG. 4 is an explanatory view showing a state in which a member to be attached is attached to a base member by a fastener.

FIG. 5 is an enlarged cross-sectional view of a main part showing another embodiment.

[Explanation of symbols]

 1 Base Member 3 Stopper 4 Head 5 Insertion Shaft 60 Locking Groove 7 Notch 8 Engagement Hole 81 Arc-Shaped Inner Surface 82 Engagement Inner Surface

Claims (1)

[Scope of utility model registration request] 1. A locking structure of a stopper adapted to be inserted and locked in an engagement hole 8 formed in a base member 1, wherein the stopper 3 is inserted into a head 4 and the engagement hole 8. And a locking groove 60 extending in the circumferential direction is formed on the outer peripheral surface of the insertion shaft portion 5, and the insertion shaft portion 5 is formed on one side of the outer peripheral surface in the axial direction. While the notch portion 7 extending to the inside is provided, the engagement hole 8 is provided with an arcuate inner surface 81 larger than the diameter of the arcuate outer peripheral surface of the insertion shaft portion 5, and the insertion shaft portion 5.
Of the engaging inner surface 82 corresponding to the notch portion 7 of the engaging inner surface 82, and the distance L1 from the center position in the longitudinal direction of the engaging inner surface 82 through the center of the engaging hole 8 to the arc-shaped inner surface 81 is A stopper locking structure characterized in that a diameter L2 of a groove bottom of the locking groove 60 in the insertion shaft portion 5 is made substantially equal.