JPH0710536U - Substrate fixing device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a substrate fixing device capable of fixing a substrate to a box with an appropriate tightening force. [Constitution] Box 1 formed by screw 6 and head 7
A male screw body 3 fixed to the bottom of the board, and a female screw body 4 for fixing the board with the board sandwiched between the head part and the screw part with the screw part penetrating the board 2. In the board fixing device including, a locking portion 8 that locks a female screw body in the direction in which the screw portion intersects with the male screw body so that the screw tightening is completed with the substrate sandwiched. Locked portions 8 that are locked to the locking portions are provided on the screw bodies.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a board fixing device for fixing a board to a box used for a distribution board, a control board, or the like.

[0002]

[Prior art]

 Conventionally, as a substrate fixing device for fixing a substrate to a box, a device generally composed of a male screw body (bolt) and a female screw body (nut) is used.

That is, the board is fixed by tightening the female screw body in a state where the screw portion of the male screw body fixed to the bottom of the box penetrates the board.

[0004]

[Problems to be solved by the device]

 In the board fixing device described above, the female screw body is fastened to the screw portion of the male screw body to fix the substrate, so that the tightening force of the female screw body must be appropriately set by the operator. For this reason, there is a risk that the female screw body will not be tightly tightened and the board will wobble, or that the female screw member will be over-tightened and the screw portion of the male screw member or the female screw member will break, making it impossible to attach again.

The present invention has been made in view of the above problems, and an object thereof is to provide a substrate fixing device that can fix a substrate to a box with an appropriate tightening force.

[0006]

[Means for Solving the Problems]

 In order to solve such a problem, a board fixing device according to claim 1 fixes a board to a box, and is a male member formed of a screw portion and a rotatable head and fixed to the bottom portion of the box. A board fixing device comprising: a screw body; and a female screw body that is screwed to the screw portion with the screw portion penetrating the substrate to fix the substrate with the board sandwiched between the head portion, A locking portion that locks the female screw body in the direction in which the screw portions intersect so that the screw tightening is completed with the board sandwiched between the male screw body and the female screw body. Each of the locked portions to be stopped is provided.

According to a second aspect of the present invention, there is provided the substrate fixing device, wherein the locking portion of the first aspect is spring-biased toward the surface of the screw portion that locks the locked portion.

[0008]

[Action]

 According to the configuration of claim 1, when the female screw body is tightened while the screw portion of the male screw body penetrates the substrate, the female screw body moves toward the head of the male screw body and is engaged. The stopper is locked by the locking part and the screw tightening is completed.

According to the configuration of claim 2, when the female screw body is tightened while the screw portion of the male screw body penetrates the substrate, the female screw body comes into contact with the locking portion so that the male screw body is engaged. When the locked part moves toward the inside of the screw part of the body and the locked part is located in front of the locked part, the locked part moves toward the surface of the screw part and the locked part is locked by the locked part. It

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. That is, the substrate fixing device for fixing the substrate 2 to the box 1 is composed of the male screw body 3 and the female screw body 4. As shown in FIG. 1, this board fixing device is fixed to a box in a state in which the male screw body 3 is fitted into a fixing bracket 5 having a substantially U-shaped cross section fixed to the box 1.

The male screw body 3 is formed in a substantially convex shape with a screw portion 6 and a rotatable head portion 7. The head portion 7 is arranged between the bottom portion of the box 1 and the fixing metal fitting 5, and the screw portion 6 is provided. It is possible to fix the substrate 2 by screwing the female screw body 4 in a state in which it is projected and penetrates the substrate 2. As shown in FIG. 2, the screw portion 6 has a hollow inside in a direction crossing the vicinity of the head portion 7, and the locking portion 8 (locking sphere) and the locking portion 8 are provided from one side. The coil spring 9 which biases the screw portion 6 toward the surface of the screw portion 6 is fitted therein, and then the lid body 10 is fitted therein so as to prevent the locking portion 8 and the coil spring 9 from coming out.

The female screw body 4 is for fixing the substrate 2 in a state where the screw portion 6 penetrates the substrate 2 and is screwed into the screw portion 6 so that the substrate 2 is sandwiched between the head portion 7 and the screw portion 6. . As shown in FIG. 3, the female screw body 4 has a female screw formed therein, and a locked portion 11 (locked groove) into which the locking portion 8 of the male screw body 3 is fitted. When the female screw body 4 is screwed into the screw portion 6 of the male screw body 3 with the board 2 sandwiched, the locked portion 11 is locked by the locking portion 8 and screw tightening is completed. It becomes a state. In other words, the design is such that the force that tightens the board 2 when the locked part 11 is locked by the locking part 8 is just the right force, so the work of fixing the board 2 to the box 1 is easy. Become.

If boards with different thicknesses are specified, it is possible to make the tightening force of the boards constant by making the thickness between the boards and the fixing metal pieces and the distance between the locking portion and the head substantially the same. it can. That is, when the thickness of the substrate is large, the distance between the head and the locking portion may be widened, and when the thickness of the substrate is small, the distance between the head and the locking portion may be narrowed.

Further, according to the present embodiment, since the locking portion is biased toward the surface of the screw portion that locks the locked portion, the work of tightening the female screw body to the male screw body can be performed. It will be easy.

[0015]

[Effect of device]

 According to the board fixing device of claim 1, when the female screw body is tightened with the screw portion of the male screw body penetrating the substrate, the female screw body moves toward the head of the male screw body, Since the locked portion is locked by the locking portion and the screw tightening is completed, the board can be fixed to the box with an appropriate tightening force.

According to the board fixing device of the second aspect, when the female screw body is tightened while the screw portion of the male screw body penetrates the substrate, the female screw body comes into contact with the locking portion. When the male screw moves toward the inside of the screw part and the locked part is located in front of the locking part, the locking part moves toward the surface of the screw part and the locked part engages with the locking part. Since it is stopped, the work of tightening the female screw body to the male screw body becomes easy in addition to the effect of the first aspect.

[Brief description of drawings]

FIG. 1 is an exploded view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing the male screw body of FIG.

FIG. 3 is a sectional view showing a female screw body of FIG.

[Explanation of symbols]

 1 Box 2 Board 3 Male screw body 4 Female screw body 6 Screw part 7 Head part 8 Locking part 11 Locked part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H02B 1/32 1/42

Claims (2)

[Scope of utility model registration request] 1. A male screw body for fixing a substrate to a box, the male screw body being fixed to the bottom of the box and formed by a screw portion and a rotatable head, and a state in which the screw portion penetrates the substrate. And a female screw body for fixing the substrate in a state where the substrate is sandwiched between the head portion and the screw portion, and a screw is provided in a state where the substrate is sandwiched in the male screw body. A locking portion that locks the female screw body in a direction in which the screw portions intersect so that the tightening is completed, and a locked portion that is locked to the locking portion is provided in the female screw body. Board fixing device. 2. The substrate fixing device according to claim 1, wherein the locking portion is spring-biased toward a surface of a screw portion that locks the locked portion.