JPH029590Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printed circuit board holder for attaching a printed circuit board to a support member of an electronic device or the like at regular intervals, and particularly to a printed circuit board holder whose one end can be temporarily fixed to the support member.

Conventionally, in order to attach a printed circuit board to a support member, a distance collar (holder) having a through hole has been clamped and tightened. However, such a mounting means requires that the distance collar be sandwiched between the printed circuit board and the support member, and that the mounting hole of the printed circuit board, the through hole of the distance collar, and the screw hole of the support member must be aligned. Moreover, since it is usually installed in multiple locations, there are disadvantages such as difficulty in work and inefficiency. Therefore, a device has been proposed in which the holder can be temporarily fixed to the printed circuit board. These holders usually consist of two members, and are capable of sandwiching and holding a printed circuit board between the two members.

However, in conventional holders, such as those of the type shown in FIG. The thickness is limited to a certain value, and various thicknesses cannot be accommodated. Further, when the thickness of the printed circuit board is thinner than the gap, there is a problem that the printed circuit board becomes loose and cannot be installed reliably. Further, for example, in a conventional holder of the type shown in FIG. 2, the gap between the spacing member and the fitting member 10 can be applied depending on the thickness of the printed circuit board 6. However, since the engagement of both members depends on the frictional resistance between the two members by pressing the annular protrusion 12 of the spacing member 8 against the inner wall of the circular hole of the fitting member 10, they may come off when an impact is applied. There were problems such as easily damaging the printed circuit board and the electronic components attached to it.

The present invention was developed against this background, and the purpose of the present invention is to provide a device that can be mounted on printed circuit boards of various thicknesses and that does not cause play between the board and the printed circuit board. The object of the present invention is to provide a printed circuit board holder that can be mounted reliably.

The gist of the present invention, which was made to achieve such an object, is to provide a spacing member having a shaft-like protrusion at one end and a fitting hole in the axial direction, and a shaft portion. It consists of a fitting member having a flange at one end and a through hole through which a screw is inserted in the axial direction,
In addition, the shaft-shaped protrusion of the spacing member can be fitted into the mounting hole of the printed circuit board, and the length of the shaft-shaped protrusion is equal to or smaller than the thickness of the printed circuit board, and the shaft of the fitting member can be fitted into the mounting hole of the printed circuit board. A sawtooth shape that fits into the fitting hole of the member so as to be rotatable within a certain range, and further includes a locking protrusion on either the fitting hole or the shaft portion, and the other side has a sawtooth shape that can be latched to the locking protrusion. A plurality of locking teeth are provided, and these locking teeth engage the end face of the collar of the fitting member and the proximal end of the axial protrusion of the spacing member in response to relative rotation between the spacing member and the fitting member. The locking teeth are arranged in a stepped manner in the axial direction so that the distance to the end face can be adjusted, and one side of the locking teeth is formed along the axial direction of the spacing member or the fitting member. The locking protrusion is characterized in that its end portion is serrated so that it can be locked with the locking teeth.

Hereinafter, one embodiment of the present invention will be described in detail with reference to enlarged drawings.

In FIG. 3, 14 is a spacing member;
A shaft-like projection 18 having a circular cross section is protruded from one end of the spacer 16, and a fitting hole 20 passes through the axial center of the shaft-like projection 18. Further, on the side of the shaft-like projection 18 of the fitting hole 20, there is a pair of locking projections 22 that are point symmetrical with respect to the axis.
is provided protrudingly, and its tip is serrated.
The shaft-like protrusion 18 is sized to fit into a mounting hole provided on the printed circuit board, and its height is equal to or smaller than the thickness of the printed circuit board.

On the other hand, the fitting member 24 has a flange 28 provided at one end of the shaft 26, through which a machine screw insertion hole 30 is passed in the axial direction, and the flange 28 has a stepped hole with a slightly larger diameter than the insertion hole. 31 is formed. Shaft 26
can be fitted into the fitting hole 20, and a pair of continuous locking teeth 32 are formed point-symmetrically with respect to the axis on its outer circumference, and the locking protrusion 2 of the spacing member
It is said that it can be latched with 2. That is, the locking teeth 32 are arranged so that the tip of each tooth faces toward the flange 28, and the distance between the locking teeth 32 and the end surface of the flange 28 is smaller in diameter with a certain level difference from the outer peripheral surface of the shaft 26. A recessed portion 36 is formed, and one end of the recessed portion 36 is located at a certain distance in the arc direction from the locking tooth 32 near the open end of the shaft portion 26. Therefore, 1
The pair of locking protrusions 22 can be fitted into the pair of recesses 36, and within that range, the fitting member 24 and the spacing member 14 can be rotated relative to each other. As shown unfolded in FIG. 6, each side of the locking teeth 32 is serrated and faces toward the axis of the fitting member 24, so that the locking teeth 32 can be latched onto the locking protrusion 22. As a result, there is an advantage that the latch is very difficult to come off due to impact or the like. The arrangement direction of multiple locking teeth is
The distance between the end surface of the flange portion 28 and the proximal end surface of the shaft-shaped protrusion 18, that is, the gap that can sandwich the printed circuit board, can be adjusted according to the relative rotation between the fitting member 24 and the spacing member 14. is inclined to. Therefore, by relative rotation of both members 14 and 24, the printed circuit board can be held and temporarily fixed to the holder. In this way, since the gap can be adjusted, it is possible to hold printed circuit boards having different thicknesses according to various standards. Furthermore, instead of the locking teeth 32 and the locking protrusion 22, arcuate locking teeth 38 and a locking protrusion 40 may be used as shown in FIG. The locking protrusion may be a cylindrical protrusion.
As described above, since the locking teeth and the locking protrusion engage with each other, the locking is reliable and can be prevented from loosening due to impact, etc. However, on the other hand, when it is removed, the spacing member 14 A certain force may be applied between the fitting member 24 and the fitting member 24 to mutually rotate it. The actual locking teeth are not very large, so the lock can be easily removed. That is, there is an advantage that the printed circuit board can be firmly tightened and can be easily removed. It is also possible to provide the locking teeth on the spacing member and the locking protrusion on the fitting member.

Next, how to use the substrate holder of this embodiment will be explained. As shown in FIG. 8, first the printed circuit board 40
When the shaft-shaped protrusion of the spacing member 14 is fitted into the mounting hole, and then the shaft part 26 of the fitting member 24 is fitted and rotated clockwise, the locking teeth and the locking protrusion engage, ensuring a secure fit. It is latched. Next, the protrusion 44 of the support member 42 of the electronic equipment is fitted into the hole of the spacing member 14, and the machine screw 46 is tightened and fixed.
Since the board holder can be reliably attached to the printed circuit board 40 without play, alignment of the screw holes at multiple locations is simple and easy when attaching it to the support member 42.
It is possible to improve work efficiency.

Although one embodiment of the invention has been described above, the invention is not limited to such an embodiment in any way, and it goes without saying that it can be implemented in various forms without departing from the gist of the invention.

As described in detail above, according to the present invention, the shaft portion of the fitting member is inserted into the fitting hole of the spacing member, and the serrated locking teeth are locked with the locking protrusion. The retaining tooth cooperates with the locking protrusion to ensure temporary fixation, and on the other hand, it can be easily removed by opening the fitting holding member and the spacing holding member in opposite directions with a force above a certain level.

In addition, in the present invention, since the plurality of locking teeth are formed in a sawtooth shape and are inclined stepwise in the axial direction, the fitting member and the spacing member can be rotated relative to each other, and the axial center By slightly moving it in the direction, the locking position of the locking teeth changes, and the fitting member and the spacing member are temporarily fixed at the changed position, thus making it possible to accommodate various printed circuit board thicknesses.
Highly versatile.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional views showing a conventional example of a holder for a printed circuit board. FIG. 3 is an enlarged perspective view of a spacing member used in an embodiment of the present invention;
5 and 5 are enlarged perspective views of the fitting member used in the same embodiment, FIG. 6 is a detailed view of the locking teeth of the fitting member, and FIG. 7 is a locking member that can be used in place of the locking teeth described above. A detailed view of the retaining tooth, FIG. 8, is a sectional view showing the usage state of the same embodiment. 14... Spacing member, 18... Axial protrusion, 2
0... Fitting hole, 22... Locking protrusion, 24... Fitting member, 26... Shaft portion, 28... Flange portion, 32,3
8...Latching teeth.

Claims (1)

[Claims for Utility Model Registration] A spacing member having a shaft-like protrusion at one end and a fitting hole in the axial direction, and a spacing member having a flange at one end of the shaft and threaded in the axial direction. and a fitting member provided with a through hole passing through the spacing member, and the axial protrusion of the spacing member can be fitted into the mounting hole of the printed circuit board, and the length of the axial protrusion is equal to the thickness of the printed circuit board. or smaller, the shaft portion of the fitting member is fitted into the fitting hole of the spacing member so as to be rotatable within a certain range, and a locking protrusion is provided on either the fitting hole or the shaft portion; The other side is provided with a plurality of serrated locking teeth that can be latched to this locking protrusion, and these locking teeth engage the collar of the fitting member in response to relative rotation between the spacing member and the fitting member. arranged so as to be inclined stepwise in the axial direction so as to be able to adjust the distance between the end face of the protrusion and the proximal end face of the shaft-shaped protrusion of the spacing member;
Moreover, one side of the locking tooth is formed along the axial direction of the spacing member or the fitting member, and the locking protrusion has a serrated end that can be locked with the locking tooth. A printed circuit board holder characterized by: