JPH0842547A - Screw for mounting panel - Google Patents

Abstract

PURPOSE:To facilitate the rotation of a mounting screw, brought into an approaching state, by providing a rotary knob part in which a recessed part is formed, a shaft part rotatably and slidably contained therein, a mounting screw part having a knob shaft part to the other end of which a panel is attached, and a spring member to press the shaft part against mounting screw part side. CONSTITUTION:When a rotary knob part 38 is operated and the recessed part 44 of an annular edge par 42 and the lock part 26 of a shaft part 12 are registered with each other, a shaft part 12 is pressed through the force of a spring member 50 and a protrusion edge part 16 is slid until it brought into contact with an annular edge part 42, and most thereof is exposed from the rotary knob part 38 and the whole of a screw 10 is lengthened. When the rotary knob part 38 is rotated in a pressed state and the recessed part 44 and the lock part 26 are brought into a position where they are not registered with each other, the lock part 26 is brought into contact with the annular edge part 42 and the hole of the screw 10 is shortened. Thus, when the screw 10 for mounting is arranged in the vicinity, only the rotary knob part 38 of the screw 10 for mounting desired to be rotated for control is protruded from the other and easy operation is practicable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel mounting screw, and more particularly to a panel mounting screw suitable for use in mounting a card module on a chassis of an electronic equipment chassis.

[0002]

2. Description of the Related Art A card module has a connector attached to one end of a circuit board and a panel attached to the other end opposite to the connector at a right angle. The card module is inserted into the electronic device, and the connector of the card module is connected to the connector inside the electronic device housing. Since this connection also mechanically attaches the card module to the electronic device housing, there are cases where no other means for attaching the card module is provided. However, in this case, the connection of the connector may gradually become incomplete due to vibration.

In order to keep the card module securely connected to the electronic device, the panel of the card module is fixed to the chassis of the electronic device housing with a mounting screw.
Usually, the screw has a relatively large diameter rotary knob so that it can be tightened to some extent with a finger.

[0004]

A plurality of card modules are usually mounted in parallel with an electronic device housing, and in the mounted state, the screws are arranged in a straight line. The panel width of each module is designed to be as narrow as possible so that a large number of modules can be mounted in the housing, so that the mounting screws of adjacent card modules are close to each other. Therefore, when the card module sandwiched between the card modules on both sides is attached or detached, it may be difficult to operate the rotary knob of the screw.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a panel mounting screw that allows a plurality of finger operating mounting screws arranged in proximity to be easily rotated.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a rotary knob portion having at one end thereof an annular edge portion having a recess formed therein, a protruding edge portion extending outward at one end, and a locking portion protruding to a side surface. Have,
A panel mounting screw including a shaft portion that is rotatably and slidably accommodated in the rotary knob portion, a mounting screw portion that is mounted to the other end of the shaft portion, and a spring member that presses the shaft portion toward the mounting screw portion. Is.

[0007]

When the rotary knob is operated to align the concave portion of the annular edge portion with the locking portion of the shaft portion, the shaft portion is pressed by the spring member and slides until the protruding edge portion abuts on the annular edge portion. Then, most of it is exposed from the rotary knob and the entire screw becomes longer, and when the rotary knob is pressed and rotated, the recessed part of the annular edge and the locking part of the shaft part are not aligned. , The locking portion comes into contact with the annular edge portion to shorten the entire screw. Therefore, when the mounting screws are arranged close to each other, only the rotary knob portion of the mounting screw which is desired to be rotated can be protruded from other parts to be easily operated.

[0008]

1 is an exploded perspective view showing a mounting screw 10 of the present invention. The slide shaft 12 has a cylindrical portion 14 provided with a through hole along the central axis and a projecting edge portion 16 provided around one end of the cylindrical portion. At the other end, the cylindrical portion 14 has a flat surface portion 22 provided with a central opening 18 that is connected to the through hole and a cutout portion 20 that passes through the central opening. The diameter of the central opening 18 is smaller than the diameter of the through hole of the cylindrical portion 14. Around the cylindrical portion 14, a groove 24 is formed along the axial direction.
Is provided. The locking pin 26, which is a round bar, is housed in the groove 24. The diameter of the locking pin 26 is larger than the depth of the groove 24, and the locking pin 26 is exposed from the groove 24.

The mounting screw portion 28 includes a first disk portion 30 and a first disk portion 30.
A male screw portion 32 extending from the center of the disc portion 30 to one side, and the other side of the first disc portion 30 are connected to the first disc portion, and a female screw is cut at the center, and the female screw is sandwiched in a diametrical direction. It has the 2nd disc part 34 in which the extending projection part 36 was provided. The diameter of the second disc portion 34 is smaller than the diameter of the first disc portion 30.

The rotary knob portion 38 is formed by forming an internal thread around one end, which is an open end of the cylindrical portion 40, and providing an annular edge portion 42 extending inward at the other end. Ring edge 4
A concave portion 44 is formed on a part of the inner edge of the groove 2. The diameter of the opening 46 formed by the annular edge 42 is slightly larger than the diameter of the cylindrical portion 14 of the slide shaft 12.

With the locking pin 26 housed in the groove 24,
The slide shaft 12 is inserted into the rotary knob 38 from the open end side. Recess 4 of locking pin 26 and rotary knob 38
4, the locking pin 26 passes through the recess 44, the cylindrical portion 14 passes through the opening 46, most of which protrudes from the knob portion 38, and the protruding edge portion 16 forms the annular edge portion. Abut 42 and stop. When the locking pin 26 and the recess 44 of the rotary knob 38 are not aligned with each other, the locking pin 26 abuts the annular edge portion 42, and the cylindrical portion 1
4 only slightly protrudes from the knob 38.

In the notch 20 of the slide shaft 12 protruding from the knob 38, the protrusion 36 of the mounting screw 28 is provided.
The fixing screw 48 is screwed into the female screw of the mounting screw portion 30 through the opening 18 of the slide shaft 12 in a state in which the mounting screw portion 28 is fitted.
Fix to 2. When the cutout portion 18 and the protrusion portion 36 are fitted, the mounting screw portion 28 does not rotate with respect to the slide shaft 12. Next, the coil spring 50 is attached to the slide shaft 1.
2 is placed in the through hole. The disc-shaped lid 52 has a male screw cut around the periphery and is screwed to one end of the rotary knob 38.

2 and 3 are sectional views taken along the central axis of the mounting screw 10 of FIG. Mounting screw part 2 for screw 10
8 and the slide shaft 12 by inserting a panel 54 between them and fixing them with a fixing screw 48.
9 is attached to the panel 54 of the card module. After inserting the card module into the housing of the electronic device and connecting the connectors provided to them, the mounting screw part 2
The male screw 32 of No. 8 is screwed into a corresponding female screw (not shown) provided on the housing of the electronic device. At this time, by rotating the rotary knob 38 and aligning the recess 44 with the locking pin 26 and fitting them, the slide shaft 12 does not rotate with respect to the rotary knob 38, and the rotary knob 38 is rotated. The rotation operation of can be transmitted to the mounting screw. In this way, after the card module is attached to the electronic device casing, as shown in FIG. 3, the rotary knob 38 is pushed in the direction of the arrow to rotate the recess 44 and the locking pin 26 to a position where they are not aligned. As a result, the locking pin 26 comes into contact with the annular edge portion 42 of the rotary knob portion 38. This allows the screw 10 as a whole to be kept in a shortened state.

When a single card module is to be removed for the purpose of replacement, inspection, etc. from the state in which a plurality of card modules are thus mounted, the screw 10 of the card module is rotated. The part 38 into the recess 44
By rotating the locking pin 26 and the locking pin 26 so that they are aligned with each other, the particular rotary knob 38 projects from the rotary knob 38 of another card module. This facilitates the rotation operation of the specific rotary knob 38, and facilitates the work of removing the target card module.

Although the preferred embodiments of the present invention have been described above, it will be apparent to those skilled in the art that various modifications can be made without departing from the gist of the present invention. For example, the locking pin 26 may be formed integrally with the cylindrical portion 14.

[0016]

According to the present invention, when the mounting screws for finger operation are arranged close to each other, only the rotary knob portion of the mounting screw to be rotated can be protruded from the other to easily operate. can do.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a panel mounting screw of the present invention.

2 is a sectional view taken along the central axis of the panel mounting screw of FIG.

3 is a sectional view taken along the central axis of the panel mounting screw of FIG.

[Explanation of symbols]

 12 Shaft part 26 Locking part 28 Mounting screw 38 Rotating knob part 50 Spring member

Claims (1)

[Claims] 1. A rotary knob portion having at one end thereof an annular edge portion in which a concave portion is formed, a projecting edge portion extending outward at one end, and a locking portion protruding to a side surface, wherein the rotary knob portion is provided. A shaft portion that is rotatably and slidably accommodated, a mounting screw portion that is attached to the other end of the shaft portion with a panel sandwiched therebetween, and a spring member that presses the shaft portion toward the mounting screw portion side. Panel mounting screw characterized by.